1_power electronics catalogue

POWER ELECTRONICS PRODUCTS LIST

PART - I : SCR RELATED PRODUCTS

1. SCR CHARACTERISTICS TRAINER

1. SCR, MOSFET, IGBT & TRIAC - Static characteristics module [PEC16M1-A]2. SCR VI Characteristics study trainer [PEC16M1B]3. TRIAC VI Characteristics study trainer [PEC16M1C]4. DIAC VI Characteristics study trainer [PEC16M1E]5. Transient Characteristics of SCR and MOSFET [VPET-216]6. Switching Characteristics of SIT. [VPET-217]7. Construction of SCR using two transistor. [PEC16M1F]

2. SCR TRIGGERING CIRCUITS TRAINERS

A. Types of Triggering Modules

1. R,R-C,UJT Triggering circuit module [PEC14M12]2. 555 Timer Triggering circuit module [PEC14M13]3. Single phase Triggering Module [PEC14M14]4. Single phase bridge firing circuit with PI control. [PEC14M14-PI] 5. Chopper firing circuit module [PEC14M16]6. Cyclo convertor Firing module [PEC14M17]7. Cosine firing circuit for SCR converter [PEC14M18]8. Microprocessor based Single phase SCR firing circuits [PEC18MP1]9. Microprocessor based Three phase SCR firing circuits [PEC18MP2]10. TCA-785 IC based Single phase SCR firing circuit [PEC14M30]11. TCA-785 IC based Three phase SCR firing circuit [PEC14M31]12. SCR Triggering circuit trainer [PEC14M12E]

B. Types of Power Modules

1. Device Module (SCR, TRIAC, DIAC & DIODE) [PEC14M15]2. L-C Module [PEC14M5A]3. SCR Module [VPET-106A]4. TRIAC Module [VPET-106C]5. DIODE Module [VPET-106D]

3. LOW VOLTAGE SCR APPLICATION TRAINER

1. Single Phase AC Voltage Controller Kit [PEC14M14AC]2. Single Phase AC Voltage Controller using TRIAC [PEC14M14AC#1]3. Single phase AC Voltage controller using SCR and TRIAC [PEC14M14AC#2]4. Single Phase Half Controlled Bridge Convertor with R, RL Load [PEC14M14HW]5. Single Phase Fully Controlled Bridge Convertor with R, RL Load [PEC14M14FW]6. Forced Commutation Circuits (Class A,B,C,D & E)

Commutation (Chopper) Circuit Module [PEC14M14CH]

7. SCR based DC Chopper circuit [PEC14M14CH#1]8. Single Phase Cyclo Convertor with R, RL Loads [PEC14M14CY]9. Single Phase SCR Full Bridge Inverter [PEC14M14#INV]10. SCR Series Inverter [PEC14M6]11. SCR Phase Parallel Inverter [PEC14M7]12. Morgan Chopper Circuit Trainer [PEC14M20]13. Jones Chopper Trainer Module [PEC14M21]14. UJT Firing Circuit for SCR Converter [PEC14M12A]15. Controlled HWR and FWR using RC firing [PEC14M12C]

4. HIGH VOLTAGE SCR APPLICATION TRAINER

1. Single Phase (Half & Fully) controlled bridge converter [PEC14HV4]2. Three Phase Half & Fully Controlled bridge converter [PEC14HV5] 3. Single Phase Dual converter [PEC14HV6]4. Thyristor chopper for SCR DC Drive [PEC14HV7]5. Single Phase Parallel Inverter (High Voltage) [PEC14M7HV]6. Three phase Parallel Inverter [PEC14HV12]7. Single Phase Series Inverter (High Voltage) [PEC14HV6]8. Single Phase Cyclo Convertor (High Voltage) [PEC14HV9]9. Single Phase Mc-Murray-Bed ford full bridge Inverter [VPET-111A]10. Three Phase Mc-Murray-Bed ford full bridge Inverter [VPET-111]11. Three Phase Cyclo convertor [PEC14HV11]12. Three phase Diode characteristics trainer [PEC14HV5D]

5. SCR BASED AC/DC DRIVES

1. Speed control of DC Shunt motor using Single phase fully controlled converter [PEC-04]

2. Speed control (V/F control) of Single phase AC Induction motor [PEC14HV4C] 3. Speed control (V/F control) of Three phase AC Induction motor [PEC14HV5C]4. Speed control of DC shunt motor using

Three phase Fully controlled converter [VPET-301]5. Armature and field control of DC shunt motor [VPET-302A]6. Closed loop speed control of PMDC Motor using SCR converter [PEC-03A]7. Speed control of DC shunt motor using SCR dual converter [PEC14HV6A]8. Thyristor chopper for DC motor drive [PEC14HV7]9. Speed control of single phase Induction motor

using cyclo converter [PEC14HV9]10. Speed control of Three phase slip ring induction motor

using Static Kramer drive [PEC16HV10B]11. DC Series motor controller using Jones Chopper. [PEC14M21A]12. AC Servo Motor position control trainer [PEC-02]13. Speed control of Two phase AC Servo motor [PEC-00A]14. Transfer function of AC Servo Motor [VPET-302]15. Transfer function of DC Servo Motor [VPET-300A]16. Transfer function of DC Motor & DC Generator trainer [PEC14HV1]17. Ward Leonard speed control system Transfer function [PEC14HV2]

18. Microcontroller based Slip Ring induction motor speed control using Static Krammer Drive [PEC16HV10B]

19. DSP Based Static Krammer Drive [PEC16HV10C] 6. STANDALONE SCR TRAINERS

1. UJT Characteristic and Oscillator study module [PEC14M5]2. Digital Measurement of phase angle [PEC14M19]3. AC solid state relay using Opto-coupler Isolation [PEC14M10] 4. SCR ring counter module [PEC14M11]5. Fast Recovery Diode Characteristics study module [VPET-304]6. AC phase control using SCR, DIAC & TRIAC [PEC14M22]7. SCR DC circuit breaker [VPET-100]8. Zero Voltage switching using SCR/TRIAC [PEC14M9]9. Optical TRIAC System [VPET-400]10. Automatic Lighting control using SCR & Opto

electronic components. [VPET-401]

PART - II : IGBT / MOSFET RELATED PRODUCTS

1. IGBT / MOSFET STATIC AND DYNAMIC CHARACTERISTICS TRAINER

1. BJT, IGBT, MOSFET - Characteristics trainer [PEC16M1]2. IGBT, MOSFET, SCR, & TRIAC - Static characteristics module [PEC16M1-A]3. IGBT characteristics trainer [VPET-202]4. Transient Characteristics of SCR and MOSFET [VPET-216]5. Characteristics of MOSFET & IGBT [VPET-202A]6. Measurement of pinch-off voltage of MOSFET [PEC16M1G].

2. IGBT / MOSFET BASED LOW VOLTAGE APPLICATION TRAINERS

1. Single phase MOSFET Module [PEC16M2]2. Single phase IGBT Module [PEC16M3]3. Single phase PWM Inverter control module # 1 [PEC16M4#1]4. PWM Inverter control module # 2 [PEC16M4#2]5. Chopper control circuitry module [PEC16M5]6. Three phase MOSFET Power module [PEC16M2#3]7 Three phase IGBT power Module [PEC16M3#3]8 Three phase PWM Inverter control module [PEC14M4#3N]9. IGBT based chopper circuit [PEC16M3/M5]10. Two phase IGBT Based chopper [PEC16M3A]11. DC Motor control using H-Bridge [PEC16M3C]

3. IGBT/MOSFET BASED HIGH VOLTAGE APPLICATION TRAINERS

1. Single phase IGBT based PWM Inverter [PEC16HV1#1]2. Single phase MOSFET based PWM Inverter [PEC16HV1A]3. Single phase input Three phase output IGBT based

PWM Inverter & V/F Control Trainer [PEC16HV2]

4. 3 phase input 3 phase output IGBT based PWM inverter and V/F controller [PEC16HV5]

5. Single phase input IGBT based chopper Trainer [PEC16HV3-S]6. Single phase input IGBT based Four Quadrant Chopper [PEC16HV3]7. 3 phase input IGBT based four quadrant chopper [PEC16HV7]8. 500VA on-line/off-line UPS Trainer Module [PEC16HV4]9. DSP based 500VA UPS Trainer [PEC16HVDS-UPS]10. IGBT Based Three phase PWM inverter [PEC16HV2A]

4. IGBT/MOSFET BASED AC/DC DRIVES

1. Speed control of single phase induction motor using IGBT inverter (V/F control) [PEC16HV1]

2. Speed control of Three phase induction motor using IGBT inverter (V/F control) [PEC16HV2]

3. Speed Control of Three phase induction motor using IGBT inverter [PEC16HV5]

4. Speed Control of DC shunt motor using IGBT using single Quadrant Chopper [PEC16HV3-S]

5. Speed Control of DC shunt motor using IGBT using Four Quadrant Chopper (Single phase input) [PEC16HV3]

6. Speed control of DC Shunt motor using IGBT using Four Quadrant chopper (Three phase input) [PEC16HV7]

7. Speed control of Slip Ring Induction motor using IGBT chopper [PEC14HV10-A]

8. DC Position control system [PEC-01]9. DSP Based DC Motor position control [VPET-107]10. Amplidyne characteristics trainer [VPET-403]11. Speed control and Electronic braking of DC shunt motor [VPET-404]12. Electrical braking of three phase induction motor [VPET-405]13. Synchro transmitter and receiver trainer [PEC-03]

5. DC-DC CONVERTER / SMPS TRAINER

1. Single & Multiple output SMPS Trainer [VSMPS-02]2. Buck-boost chopper [VPET-350]3. Push pull inverter [PEC16M11]4. Resonant converter trainer [VPET-315]5. Fly back converter [VPET-316]6. Boost Chopper [PEC16M10]7. Forward, Fly-back, Buck, Boost & Buck-boost

converter trainer [VPET-317]8. Computer SMPS Trainer [VSMPS-04]

PART - III : OTHER PRODUCTS

1. POWER ELECTRONICS TRAINERS FOR POLYTECHNICS

1. Single phase half controlled converter [VPET-204]2. Single phase fully controlled converter [VPET-205]3. Three phase half controlled converter [VPET-215]4. Three phase fully controlled converter [VPET-215A]5. SCR/TRIAC AC Phase Control trainer [VPET-203]6. Three phase AC Voltage controller trainer [VPET-215B]7. DC Chopper Trainer [VPET-208]8. Line Synchronized UJT Triggering Module [VPET-200]9. Lamp Control using DIAC & TRIAC [VPET-201]10. Basic Series inverter trainer [VPET-207]11. Single phase cyclo converter module [VPET-209]12. DC Motor speed control trainer [VPET-211]13. Speed control circuit for Universal Motor [VPET-212]14. Closed loop control of FHP AC Induction motor [VPET-213]15. DC Motor speed control trainer (Closed loop) [VPET-214]

PART - IV : POWER ELECTRONICS ACCESSORIES

1. Low Voltage Accessories

a. Resistive Load [PEC LVACC1]b. Inductive Load [PEC LVACC2]c. PMDC Motor (12V,24V PMDC) [PEC LVACC3]

2. High Voltage Accessories

a. Loading Rheostat (Single phase, Three phase) [PEC HVACC1]b. Variable Inductive Load [PEC HVACC2]c. Motor Load [PEC HVACC3]

OTHER PRODUCTS

a. Commercial AC/DC Drivesb. Eddy current dynamiter loadingc. Eddy current drived. CRO.

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6. CYCLO CONVERTER FIRINGMODULE (PEC14M17)

* Provision to vary frequency & phaseangle of SCR triggering pulses.

* Line synchronized IC based firingcircuit for phase control.

* Line synchronization achieved by stepdown (12 - 0 - 12V) transformer.

* One no potentiometer used to vary thefiring angle (180 - 0).

* Programmable IC for firing circuitfrequency variation.

* Two Nos toggle switch to selectfrequency 50Hz, 50 / 2Hz, 50 / 3Hz, 50/ 4Hz.

* Four Nos gate pulse to trigger fourSCR. 1:1:1 pulse transformer used forgate pulse isolation.

* All four pulses terminated on the frontpanel for external device module(PEC14M15) interface.

* Carrier logic circuit implemented,carrier frequency 4KHz.

* Debounce logic circuit implemented forSCR gate pulse ON/OFF.

* One no. toggle switch for SCR gatepulse ON/OFF.

* 230V, 50Hz AC input, fuse provided forover load protection.

* One no. rocker switch with LEDindication for power ON/OFF.

* By external interface with devicemodule(PEC14M15) and inductive load(PEC13ACC1) step - down cycloconverter experiment can be performed.

7. COSINE FIRING CIRCUIT FORSCR CONVERTER (PEC14M18)

* Line synchronized IC based cosine wavecrossing firing circuit.

* Line synchronization achieved by step -down transformer.

* Op-amp based integrator circuit forcosine wave generator.

* Four Nos gate pulse to trigger fourSCR. 1:1:1 pulse transformer used forpulse isolation.

* One No. potentiometer used to vary thefiring angle (180 - 0).

* All four pulses terminated on the frontpanel for external device module(PEC14M15) interface.

* Carrier logic circuit implemented forSCR self - starting. Carrier frequency4KHz.

* Debounce logic circuit implemented forSCR gate pulse ON/OFF.

* One no . toggle switch provided for SCRgate pulse ON/OFF.


* One No . rocker switch with LEDindication for power ON/OFF.

* By external interface with device module(PEC14M15) the following experimentscan be conducted.

1. Single phase half controlledconverter.

2. Single phase fully controlledconverter.

3. Single phase AC regulator.

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8. MICROPROCESSOR BASEDS I N G L E P H A S E S C RTRIGGERING CIRCUIT TRAINER(PEC18MP1)

* This trainer consists of (1) 8085microprocessor kit , (2) SCR firing pulseinterface chord with SCR device module.(PEC18MP1)

MICROPROCESSOR TRAINER

* 8085 Microprocessor (Micro - 85ebII).* 8KB RAM, 8KB - EPROM. One 8255

port to provide 24 TTL I / O lines.* 21 Keys multifunction key board with

double short characters for long life.* 6 Digit 7 segment display.

SCR FIRING PULSE INTERFACECHORD (PEC18MP1)

* One no. line synchronized ZCD generator.230V / 9V step down transformer used forline synchronization.

* One no. 26 pin header to interfacemicroprocessor kit.

* Two Nos pulse amplifier with pulseisolation circuits.

* Two Nos 1:1 pulse transformerprovided for gate pulse isolation.

* All four pulses terminated in the PCBfor SCR interface with

* Four Nos TYN612 SCR with snubbercircuit provided for power circuit.

* All A,K,G terminals are terminated forexternal power circuit configuration.

* One no. 230V / 24V AC, 2Ampprovided for SCR power circuit input.

* One no. fixed resistor / lamp used as aload.

SUGGESTED EXPERIMENTS

1. Single phase half / fully controlledconverter with R & L load,

2. Single phase AC regulator with R & Lload.

9. MICROPROCESSOR BASEDTHREE PHASE SCR TRIGGERINGCIRCUIT TRAINER (PEC18MP2)

This trainer consists of (1) 8085microprocessor kit, (2) SCR firing pulseinterface chord with SCR device module.(PEC18MP2).

* MICROPROCESSOR TRAINER :* 8085 Microprocessor (Micro - 85ebII)* 8 KB RAM, 8KB - EPROM. One 8255

port to provide 24 TTL I/O lines.* 21 Keys multifunction key board with

double short characters for long life.* 6 Digit 7 segment display.

SCR FIRING PULSE INTERFACECHORD (PEC18MP2)

* Three Nos line synchronized ZCDgenerator . 230V / 9V , Three phase stepdown transformer used for linesynchronization.

* One Nos 26 pin header to interfacemicroprocessor kit.

* Six Nos pulse amplifier with pulseisolation circuits.

* Six Nos 1:1 pulse transformer providedfor gate pulse isolation.

* All six pulses terminated in the PCB forSCR interface with ON/OFF switch.

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SCR POWER CIRCUIT (PEC14HV1#P)* Six Nos TYN612 SCR with snubber

circuit provided for power circuit.* All A,K,G terminals are terminated for

external power circuit configuration.* One no. three phase 230V / 24V AC,

2Amp provided for SCR power circuitinput.

SUGGESTED EXPERIMENTS1. Three phase fully controlled converter

with R & L load2. Three phase AC regulator with R & L

load

10. TCA-785 IC BASED SINGLEP H A S E S C R F I R I N GCIRCUIT(PEC14M24)* It consists of four number of isolated

triggering pulse to trigger four scr* TCA785 ic used for phase angle

variation* One number of 230/9v step-down

transformer provided for supplysynchronization

* One number of potentiometer providedfor phase angle or firing angle variation(180-0 Degree).

* Carrier logic implemented in thepulses for scr self starting.

* Pulse transformer provided for scrpulse isolation.

* 230v ac input,+15vdc for controlcircuit.

* Necessary test points provided forwave form measurement.

* All components are mounted in thePCB fixed with nice cabinets.

* Facility provided for external control(0-5)Vdc.

11. TCA-785 IC BASED THREE PHASESCR FIRING CIRCUIT(PEC14M25)* It consists of six number of isolated

triggering pulse to trigger six SCR* TCA785 IC used for phase angle

variation in all three phase outputs.

* One number of three phase 230/9vstep-down transformer provided forsupply synchronization

* One number of potentiometer providedfor phase angle or firing anglevariation (180-0 Degree).

* Carrier logic implemented in thepulses for SCR self starting.

* Pulse transformer provided for scrpulse isolation.

* 440v ac input,+15vdc for controlcircuit.

* Necessary test points provided forwave form measurement.

* All components are mounted in thepcb fixed with nice cabinets.

* Facility provided for external control(0-5vdc)

12. SCR TRIGGERING CIRCUITTRAINER (PEC14M12E)

This setup consists of the following basicfiring circuits to trigger SCR.

a. R, RC, Triggering circuits,b. Basic DC Triggering circuitc. UJT Triggering circuitd. Micro controller based triggering

circuita. R, RC Triggering circuit:

* One no. of resistor and one no. ofcapacitor forms R, RC firing circuit

* Potentiometer used for firing anglevariation

* Output terminated by connectors.* Necessary test points provided

b. Basic DC Triggering circuit :* Variable DC power supply with

protection.

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* One potentiometer used to vary theDC voltage as well as the firing angle.

* Necessary test points provided c. UJT Triggering Circuit :

* One no. of 2N2646 UJT used forfiring pulse generation.

* Variable R & C provided fortriggering circuits

* Potentiometer provided for firingangle variation.

* Pulse transformer provided for pulseisolation

* 4 Nos. of triggering pulses terminatedby suitable connectors.

* Necessary test points.

d. Microcontroller based Firing circuit :* dsPIC30F4011 based firing pulse

generation* One no. of pulse output with firing

angle variation (0-180)* One no. of digital key provided for

firing angle variation.

e. SCR Module :* One no. of SCR with snubber and heat

sink provided* Fixed R Load.* 24V/1A AC Source provided for

power circuit input

B. TYPES OF POWER MODULE

1. SCR, TRIAC, DIAC DEVICEMODULE (PEC14M15)

* It is a common device module, byinterface with external firing module it canbe used for different applications.

* Four Nos TYN1225 SCR with fuseprotection. A,K,G terminals of all SCRterminated individually for externalconnection.

* Four Nos diode with fuse protection .A,K of all diode terminals terminatedindividually for external connection.

* One no . BTA12 TRIAC with fuseprotection. MT1,MT2,G terminals areterminated individually for externalconnection.

* One no. DIAC with fuse protection.MT1,MT2 terminals are terminated forexternal connection.

* 24VDC / 2A unregulated power supplyfor device DC operation.

* One no. fuse provided for DC powersupply over current protection.

* One no. toggle switch for ON/OFF24VDC supply.

* Snubber circuit provided for all powerdevices.

* Low voltage isolation transformerprovided for power circuit inputInput : 230V AC , 50HZOutput : 24 - 0 - 24V AC, 3AMP.

* The following experiments can beconducted using external firing module

1. Line commutated converter /regulator applications.

2. Inverter applications.3. DC chopper applications.

2. L-C MODULE (PEC14M5A)

* Inductance : 120 :H @ 4 Amp * Air core inductor with six tappings.* Each tapping is percentage of 120mH

(0%, 10%, 20%, 30%, 50%, 75%,90%, 100%)

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* Combination of commutationcapacitors.

* Used for various commutation circuitsin chopper circuit.

* Housed in a box with socketstermination for all inductors andcapacitors tappings.

3. SCR MODULE (VPET-106A)

* It consist of one number of SCR(metal package)with heatsink isprovided . SCR rating is 1200v/50Amps.

* SCR with heatsink is fixed on a openwooden box with G,A,K terminals arebrought out by banana socket.

* RC snubber circuit and fuse areprovided

4. TRIAC Module (VPET-106C)

* It consist of one number of TRIAC(metal package)with heatsink isprovided.

* TRIAC with heatsink is fixed on aopen wooden box with G, MT1, MT2terminals are brought out by bananasocket.

* RC snubber circuit and fuse areprovided.

5. DIODE Module (VPET-106D)

* It consist of one number of diode (metalpackage)with heatsink is provided . Dioderating is 1200v /50Amps.

* Diode with heatsink is fixed on a openwooden box with A,K terminals arebrought out by banana socket.

* RC snubber circuit and fuse areprovided.

3. L O W V O L T A G E S C RAPPLICATION TRAINER

1. SINGLE PHASE AC VOLTAGECONTROLLER (PEC14M14AC)

* Consists of firing circuit, SCR powercircuit and load.

* Line synchronized IC based linear firingcircuit.

* Line synchronization achieved by 230 /9V step - down transformer.

* Two Nos firing pulses to trigger twoSCRs connected in anti - parallel.

* 1:1:1 Pulse transformer used for SCRgate pulse isolation.

* One Nos potentiometer used to vary thefiring angle (180 - 0).

* Carrier logic implemented, carrierfrequency 4KHz.

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* One No. toggle switch with debouncelogic for pulse ON/OFF.

* Provision to control the firing anglethrough external [0 - 5V] DC (optional)

* Power circuit consists of two Nos SCRwith snubber circuit & fuse.

* Anode, Cathode, Gate terminals areterminated in the front panel for userconnection.

* 24V AC, 1AMP provided for powercircuit input with ON/OFF switch.

* One No. fixed R, L load provided forpower circuit.

* 230V, 50Hz AC input with ON/OFFrocker switch , fuse for over load.

SUGGESTED EXPERIMENTS :1. Single phase AC regulator with R and

R - L load.

2. SINGLE PHASE AC VOLTAGECONTROLLER USING TRIAC(PEC14M14AC#1)

* Line synchronized IC based linear firingcircuit for TRIAC.


* One No. firing pulse to trigger TRIAC.* 1:1 Pulse transformer used for TRIAC

gate pulse isolation.* One No. potentiometer used to vary the

firing angle (180 - 0)* Provision to control the firing angle

through external [0 -5V] (optional).* Carrier logic circuit implemented,

carrier frequency 4KHz.* Debounce logic circuit implemented for

gate pulse ON/OFF.* One No. toggle switch for gate pulse

ON/OFF.* One No . TRIAC with snubber & fuse

for AC regulator power circuit.* 24V AC, lamp with ON/OFF switch for

power circuit input.* One o . fixed R and L used as load for

power circuit.* 230V, 50Hz AC input, fuse provided for

over load protection.* One no. rocker switch for power

ON/OFF.

SUGGESTED EXPERIMENTS :

1. Single phase AC regulator using TRIACwith R and RL load.

3. SINGLE PHASE AC VOLTAGECONTROLLER USING SCR andTRIAC (PEC14M14AC#2)

* Line synchronized IC based linear firingcircuit for TRIAC.


* One No. firing pulse to trigger TRIAC.* 1:1 Pulse transformer used for TRIAC

gate pulse isolation.* One No. potentiometer used to vary the

firing angle (180 - 0)* Provision to control the firing angle

through external [0 -5V] (optional).* Carrier logic circuit implemented, carrier

frequency 4KHz.* Debounce logic circuit implemented for

gate pulse ON/OFF.* One No. toggle switch for gate pulse

ON/OFF.

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* One No . TRIAC with snubber & fusefor AC regulator power circuit.

* 24V AC, lamp with ON/OFF switch forpower circuit input.

* One o . fixed R and L used as load forpower circuit.


* One no. rocker switch for powerON/OFF.

SUGGESTED EXPERIMENTS :1. Single phase AC regulator using TRIAC

with R and RL load.

4. SINGLE PHASE SCR HALFCONTROLLED CONVERTER(PEC14M14HW)


* Line synchronized IC based linear firingcircuit for SCR.


* Four no . firing pulse to trigger SCR.* 1:1 Pulse transformer used for SCR gate

pulse isolation.* One no . potentiometer used to vary the

firing angle (180 - 0d).* Carrier logic implemented, carrier

frequency 4KHz.* One no. toggle switch with debounce

logic for pulse ON/OFF.* Provision to control the firing angle

through external [0 - 5V].* Power circuit consists of two Nos SCR

and two power diode with fuseprotection.



* One no. fixed R,L load provided.* 230V, 50Hz AC input with ON/OFF

rocker switch, fuse for over load.

SUGGESTED EXPERIMENTS :1. Single phase half controlled converter

with R and R - L load.

5. SINGLE PHASE SCR FULLYC O N T R O L L E D B R I D G ECONVERTER (PEC14M14FW)




* Four no. firing pulses to trigger fourSCRs.

* 1:1:1 Pulse transformer used for pulseisolation.

* One No . potentiometer used to vary thefiring angle (180 - 0).


* One no. toggle switch with debouncinglogic for pulse ON/OFF.

* Provision to control the firing anglethrough external [0 - 5V].

* Power circuit consists of four no. SCRwith fuse protection.


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* One no. fixed R, L load provided.* 230V, 50Hz AC input with ON/OFF

rocker switch, fuse for over load.

SUGGESTED EXPERIMENTS :1. Single phase fully controlled converter

with R and R - L load.

6. FORCED COMMUNICATIONCIRCUITS (CLASS A, B, C, D & E)COMMUNICATION (CHOPPER)CIRCUIT MODULE).


* IC based firing circuit to trigger twoSCRs.

* One no. potentiometer used to vary thefrequency of firing pulse.

* One potentiometer used to vary the dutycycle ratio of PWM.

* Two no. toggle switch with debouncelogic for ON/OFF pulses.

* Pulse transformer used for gate pulseisolation.

* Two Nos SCR and one no diode providedwith A,K,G terminals are terminated onfront panel for external connection.

* Two Nos fixed R load. Two Noscapacitor and one no fixed inductor forcommutation circuit.

* Separate firing pulse section for linecommutation circuit and external pulsecommutation circuit.

* 15V DC, 1AMP for SCR power circuitinput and 9V AC for SCR line commutationcircuit input.

* Two no. toggle switch for ON/OFF DCand AC voltage.


1. Load commutation circuit (class - A).2. Resonant pulse commutation circuit

(class-B).3. Complementary commutation circuitry

(class-C).4. Impulse / auxiliary commutation

circuit (class-D).5. External pulse commutation circuit

(class-E).6. Line / natural commutation circuit

(class- F)

7. SCR BASED DC CHOPPERCIRCUIT (PEC14M14CH#1)

* Consists of firing circuit, power circuitand load.

* Firing circuit :* IC Based square wave generation.* Two Nos firing pulse to trigger

auxiliary and main SCR.* One potentiometer used to vary the

frequency of the firing pulse (100Hz -300Hz, Approx)

* One Nos potentiometer used to varyduty cycle ratio. (10% - 90%).

* Two Nos toggle switch to ON/OFF SCRgate pulses.

* Necessary test points to measure controlcircuit waveform in CRO.

* Power circuit :* Two Nos TYN612 SCR with heatsink,

snubber circuit & two Nos power diodeprovided for power circuit.

* One no. center tapped inductor,capacitor used for commutation circuits.

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* LM723 Based 24V DC, 2AMP DCpower supply with S / C, O / Cprotection for chopper power circuitinput voltage.

* One no. toggle switch for 24V DCON/OFF, with LED indication.


1. Auxiliary SCR commutated chopper.2. Complementary SCR commutated

chopper.3. Jones chopper.

8. S I N G L E P H A S E C Y C L OCONVERTER (PEC14M14CY)




* Four Nos firing pulse with pulsetransformer isolation to trigger fourSCR.

* One no. potentiometer used to vary thefiring angle (180 - 0).


* One no. toggle switch with debouncelogic for pulse ON/OFF.

* EPROM Based firing pulse frequencyvariation.

* Two Nos. toggle switch to selectdifferent frequency (50, 50 / 2, 50 / 3,50/ 4 Hz).

* Power circuit consists of four No. SCRwith fuse protection.


* 24V AC, 1AMP Provided for powercircuit input with ON/OFF switch.

* One no. fixed R, load provided. Centertapped inductor for power circuit.

* 230V, 50Hz AC input with ON/OFFrocker switch, fuse for over load.


1. Single phase cyclo converter withdifferent output frequency with thedifferent voltage.

9. SINGLE PHASE SCR FULLB R I D G E I N V E R T E R(PEC14M14#INV)

* Consists of SCR power circuit and firingcircuit.

* 4046 IC based square wave generationwith adjustable frequency.

* One no. potentiometer used to vary thefrequency (10 - 100Hz).

* 1:1 Pulse transformer used for gate pulseisolation.

* Pulse output terminated in the frontpanel for user patching.

* Power circuit consists of four Nos SCR(TNY612), four no diodes.

* Two Nos center tapped inductor andcapacitors provided for power circuitcommutation.

* LM 723 Based 24V / 2A DC powersupply with LED indication.

* One no. toggle switch used to ON/OFF24V DC power supply.

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* Over load and short circuit protectionprovided for DC power supply.

* 230V, 50Hz AC input, +15V DC /1AMP for control circuit.

* One no. fuse provided for power supplyprotection, necessary test pointsprovided.


1. Study of inverter firing circuit.2. Testing of SCR inverter with R load

with frequency variation.

10. S C R S E R I E S I NV E R T E R(PEC14M6)


* IC Based firing pulse generation totrigger SCR.

* One no. pot used to vary the frequencyof firing pulse (300 - 600Hz).

* One no. toggle switch to ON/OFF SCRgate pulses.


* Pulse output terminated in the PCB foruser patching.

* Power circuit consists of two Nos SCR(TYN612), center tapped inductor centertapped capacitor.



* Over load and short circuit protection ofinput DC.

* 230V, 50Hz AC input , +15V DC /1AMP for control circuit.

* One no. output PI - filter to filter seriesinverter output voltage.



1. Study of series inverter firing circuit.2. Testing of series inverter with R load


11. SCR PARALLEL INVERTER(PEC14M7)


* 4046 IC Based square wave generationwith adjustable frequency.

* One no. potentiometer used to vary thefrequency (50 - 100Hz).


* Pulse output terminated in the PCB foruser patching.

* Power circuit consists of two Nos SCR(TNY612), inverter transformer withflay back winding.

* One no. Iron core inductor provided forpower circuit.

* One no. AC capacitor for SCRcommutation.



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* Over load and short circuit protectionprovided for DC power supply.

* 230V, 50Hz AC input, +15V DC /1AMP for control circuit.


SUGGESTED EXPERIMENTS1. Study of parallel inverter firing circuit.2. Testing of parallel inverter with R load


12. MORGANS CHOPPER CIRCUITTRAINER (PEC14M20).

This trainer is designed to implement anddemonstrate Morgan chopper circuit. It canbe used for speed control of PMDC motorusing Morgan chopper.

* Single SCR with snubber circuit andone diode is provided

* Capacitor and inductor is provided forcommutation

* 24V DC/3 Amp Power supply isprovided for chopper input

* 15V / 1Amp for internal controlcircuit

* Isolation is provided for gate pulse.

13. JONES CHOPPER TRAINERMODULE (PEC14M21).

*Two nos. SCR with RC supperprovision

* Two nos. Diodes and one fixed loadresistor.

* One center tapped (0%, 50%, 100%)inductor (120mh) for power circuitwith one commutating capacitor.

* Two isolated firing pulses to fire SCR* Two nos. Toggle switches to switch

ON Auxiliary SCR pulse and mainSCR pulse.

* One 24V/1A Fixed DC Supply forpower circuit and one toggle switch toON/OFF DC supply.

* All input and outputs of Power circuitcomponents (SCR DIODE, LOAD) areterminated in a PCB for studentpatching.

* Necessary test points for study offiring circuit.

* One Potentiometer for Duty cyclevariation.

14. UJT FIRING CIRCUIT FOR SCRCONVERTER (PEC14M12B)

* Consists of UJT firing circuit and SCRpower circuit and load.

* Line synchronized UJT firing circuit.Line synchronization achieved by 230 /9V step - down transformer.

* Built in 24V AC, 1AMP for UJT firingcircuit input.

* One no. potentiometer used to vary thefiring angle (180 - 0).

* Two No. 1:1 pulse transformer providedfor gate pulse isolation.

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* All four gate pulses are terminated in thePCB with suitable connector.

* Four No. TYN612 SCR with snubbercircuit for power circuit.

* All SCR A,K,G terminals are terminatedindividually for external configuration.

* 230V / 24V, 2AMP transformerprovided for power circuit input voltage.

* One no. toggle switch to ON / OFF 24VAC.

* One no. fixed resistor one no fixedinductor provided for load.

SUGGESTED EXPERIMENTS1. Study of UJT firing circuit.2. Testing of single phase fully

controlled converter using UJT firing.3. Testing of single phase half wave

controlled converter.4. Testing of single phase AC regulator

using UJT firing

15. CONTROLLED HWR AND FWRUSING RC FIRING (PEC14M12C)

Two separate sections are provided.

a. Half wave rectifierb. Full Wave rectifier

a. Half Wave rectifier* One No. of SCR rated at 600V, 12A is

provided* R, C Based firing* Lamp load is provided* One potentiometer is used to vary the

firing angle of SCR.* 230V/24V operation

b. Full Wave Rectifier* One no. SCR rated at 600V, 12A is

provided* 4 Nos. of Diode is used * R, C Based firing* One potentiometer is used to vary the

firing angle of SCR.* 230V/24V operation

4. H I G H V O L T A G E S C RAPPLICATION TRAINER.

1. SINGLE PHASE (HALF & FULLY)C O N T R O L L E D B R I D G ECONVERTER (PEC14HV4).

* Specially designed for high voltageoperation. It consists of firing module,SCR power circuit and high voltageaccessories (optional).

1. FIRING MODULE

* Line synchronized op-amp based lineartriggering circuit.

* One no. potentiometer used to vary thetriggering angle (0 - 180d).


* Carrier logic implemented for SCR self- starting. One no. Toggle switch withdebounce logic for pulse ON/OFF.


* Pulse output terminated in the frontpanel for device module interface.

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2. SCR POWER CIRCUIT

* Power circuit consists of two no. SCR(TNY1225) rating at 1200V, 25AMPtwo Nos power diode rating at 1200V,50AMP).

* All terminals of diode and SCRsterminated on the front panel forexternal connection.

* One no. MCB provided for mains. Fuseprovided in input side.

3. SPECIFICATIONInput ------ [0 - 230V] AC, 50Hz,Output ------ [0 - 200V] DC, 5AMP /

10AMP (optional),[0-230V] AC, 5AMP /10AMP (optional).

4. SUGGESTED EXPERIMENTS1. Single phase half and fully controlled

converter with R and RL load.2. Single phase AC regulator with R and

RL load.

2. THREE PHASE (HALF & FULLY)C O N T R O L L E D B R I D G ECONVERTER (PEC14HV5).

* Specially designed for high voltageoperation. It consists of three phase firingmodule, SCR three phase power circuitand high voltage accessories (optional).

1. FIRING MODULE

* Line synchronized op-amp based threephase linear triggering circuit.

* One No. potentiometer used to vary thetriggering angle (0 - 180).

* Line synchronization achieved but threephase step -down transformer.

* Carrier logic implemented for SCR self- starting. One No. Toggle switch withdebounce logic for pulse ON/OFF.

* Six Nos 1:1 pulse transformer used forgate pulse isolation.

* All six pulses output terminated in thefront panel for device module interface.

2. SCR POWER CIRCUIT

* Power circuit consists of two No. SCR(TNY1225) rating at 1200V, 25AMPtwo no. power diode rating at 1200V,50AMP).

* All terminals of diode and SCRsterminated on the front panel forexternal connection.

* One No. MCB provided to ON/OFFinput three phase AC, and over currentprotection.

* Indicator and fuse provided for mainsR,Y,B.

3. SPECIFICATIONInput : [0 - 440V] AC, 50KHz,Output : [0 - 600V] DC, 5AMP /

10AMP (optional), Threephase converter. 0 - 440V AC, 5AMP / 10AMP (optional),Three phase regulator.

4. SUGGESTED EXPERIMENTS* Three phase half and fully controlled

converter with R and RL load. (optional)* Three phase AC regulator with R and

RL load. (load optional).

3. S I N G L E P H A S E D U A LCONVERTER (PEC14HV6A).

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a. Firing Module

* 8 nos. Isolated gate pulses for `P' groupand `N' group SCR converter.

* One DPDT switch is provided forselection of Dual converter withcirculating current mode and withoutcirculating current mode.

* Two nos. potentiometer to vary thefiring angle of with circulating currentmode and without circulating currentmode

* One pulse ON/OFF switch and powerON/OFF switch is provided

* Necessary test points provided forstudent measurement

* 15V DC & 9V AC for control circuit * All components are housed in a fine

screen printed cabinet

b. Power Circuit

* 8 Nos. of SCR with snubber protectionis provided for `P',`N' group converter

* All `A', `K' terminals are terminated infront panel for student patching

* 25 pin shielded cable for pulse input* Two Nos. 230/24V, 3A step down

transformer for power circuit input ACvoltage

* One Center tapped inductor(0%,50%,100%) for power circuit withcirculating current mode (Optional)

* All components are housed in a finescreen printed cabinet

4. THYRISTOR CHOPPER FOR SCRDC DRIVE (PEC14HV7)


* IC Based firing pulse generation totrigger auxiliary and main SCR.

* Pulse transformer provided for gatepulse isolation.

* One potentiometer used to vary the dutycycle ratio of PWM (10 - 90%).

* Two no. toggle switch with debouncelogic for ON/OFF gate pulse.

* Power circuit consists of two nosTYN1225 SCR, diode forms auxiliarySCR commutation circuit.* Fixed L - C provided for power circuit

commutation.* One no. diode bridge converter with

filter capacitor convert input 230V ACto DC for power circuit input.

* MCB Provided for input AC ON/OFF,over current protection.

* One no. diode converter provided forfield circuit (DC motor controlexperiment optional).

* 230V, 50Hz Input . Built in +15, -15VDC for control circuit.

* Provision to control the duty cycle ratiofrom external source voltage [0 - 5V].

* Power ON/OFF switch, necessary testpoints for firing circuits.


1. High voltage auxiliary SCRcommutated chopper with R, RL load

2. Speed control of DC shunt motorusing SCR chopper.

5. SINGLE PHASE PARALLELINVERTER (HIGH VOLTAGE)[PEC14M7HV]

* Input : 24V DC, 2Amp* Output Voltage : a. 230V AC, 50VA

b. 24V AC, 50VA * Output Frequency : 50Hz to 100Hz

(Variable)

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It consists of 3 separate sections which is asfollows.

a. Parallel Inverter firing circuitb. SCR power circuitc. 24V DC Source.

a. Parallel Inverter Firing Circuit :

* 4046 VCO Based square wavegeneration with adjustable frequency (50to 100Hz).

* Square wave modified into short pulsesby control ICs.

* Two nos of 1:1 Pulse transformerprovided for pulse Isolation.

* Pulses imposed with high frequencysquare (4KHz) for SCR self start

* 7 Nos. of test points provided for signaltest/measure purpose

b. Power Circuit :

* It consists of two nos. of SCRs rating at600V, 12A with heat sink is provided

* Two nos. of power diode provided.* One no. of output transformer is

provided.# Input : 24V (with 5 tappings)# Output : 230V, 24V

* One no. of Iron core Inductor isprovided (100mH, 1Amp)

* One no.fuse is provided for over loadprotection

* One no. AC Capacitor provided for SCRcommutation

c. 24V DC Source* It consists of LM723 based voltage

regulator provided for DC input to SCRpower circuit

* Rating : 24V DC, 2 Amps.* One no. of toggle switch provided for

DC ON/OFF* One LED Indication* Current fold back facility provided for

output Over current/Short circuitDocumentation Support :

* One no. of technical / User manual withcircuit diagram

Experiments :

* Study of Parallel inverter firing circuit* Study of SCR parallel inverter with

different frequency* Calculation of SCR turn ON/OFF time

of SCR parallel inverter

Protection :

* Output Over Load or short circuitprotection

Input :* 230V AC 5%, 50Hz operation.

6. THREE PHASE PARALLELINVERTER (PEC14HV12)

This trainer is designed to study the workingprinciple of three phase parallel inverter.This set up consists of,

a. Three phase parallel inverter firingcircuit

b. Parallel inverter power circuitc. LM723 based 23V DC source.

a. Three phase Parallel Inverter Firing

Circuit

* IC Based 3N square wave generationwith 120 phase shift with frequencyvariation.

* One number of potentiometer providedfor frequency adjustment (20-60Hz)

* Six numbers of pulse transformerprovided for SCR gate pulse isolation

* Gate carrier logic implemented for SCRgate pulses.

* One number of toggle switch withdebounce logic provided for all six pulseON/OFF.

* All pulses are terminated in the frontpanel for SCR patching

* Necessary test points provided on thecontrol circuit for waveformmeasurement.

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b. Parallel inverter Power Circuit :

* Six number of TYN 1225 SCR withsuitable heat-sink, snubber circuitprovided for power circuit.

* Six number of power diode provided forfly-back operation.

* Three number of ac capacitor providedfor SCR commutation

* One number of three phase24-24-0-24/24.0-24V,3Amp transformerprovided for parallel inverter powercircuit

* Necessary terminals of SCR, diode,transformer are terminated in the panelfor wiring.

c. LM723 based 24V DC Source for

parallel inverter input :* LM723 based 24V power supply

provided for parallel inverter input.* 3 Amp Capacity. * Overload, short circuit protection facility* LED provided for DC indication.

7. S I N G L E P H A S E S E R I E SINVERTER (HIGH VOLTAGE)(PEC14HV6)

This module is designed to demonstrate theworking principle of Thyristorised SeriesInverter.

MAIN CIRCUIT* 2 SCRs : Rating : 600V @ 12Amp* A Potentiometer is provided to vary the

load power.* Snubber circuit is provided to each

devices.* Circuits for commutation triggering

SCRs are provided. POWER SUPPLY

# Input 230V 10%, 50Hz single phaseAC

# 24 Volt DC @ 2 Amp to feed inverter.# 15V DC @ 0.5A regulated output for

the trigger circuits.

8. S I N G L E P H A S E C Y C L OCONVERTER (HIGH VOLTAGE)PEC14HV9.

This module is designed for center taptransformer Cyclo Converter. It consists of 4 synchronized firing pulses, 4SCRs, Relevant Power supply etc, forfrequency division of 1,2,3 & 4.

Main Circuit

* 4 SCRs : Rating 1200V @ 25Amp* 4 Synchronized firing pulses to trigger

SCRs * Digital firing for frequency division of

1,2,3 & 4.

Power Supply

* Input 230V 10%, 50Hz single phaseAC

* 15V DC @ 0.5A regulated output forthe trigger circuits.

* Center tape Transformer.

Output

* 0-230Volt AC* Frequency : 50/2 HZ, 50/3 HZ & 50/4

HZ.* The output can be loaded with R,L or

AC MOTOR (0.5hp).

Experiment :

* Study of Speed control of AC motorusing Cyclo Convertor.

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9. SINGLE PHASE MC-MURRAY-BED FORD FULL BRIDGEINVERTER (VPET-111A)

* Four isolated gate pulses are provided tofire the Four number of SCRs.

* One Potentiometer provided to vary thefrequency of the inverter from 10Hz - 50Hz

* One Potentiometer provided to vary thefrequency of the inverter

* All gate pulses are Isolated by pulseisolation transformer

* Four SCRs rated 1200V/25A provided* Two Diodes rated 1200V/6A provided* 4 Nos. of Commutating capacitors and 1

No. of center tapped inductors (Rating at120mH, 4A) provided.

* All SCRs, Diodes, Capacitors &Inductors forms Single phase inverterwith 180 mode conduction

* DC Input of inverter fed from threephase SCR converter

10. THREE PHASE MC-MURRAY-BEDFORD FULL BRIDGE INVERTER(VPET-111)

* Six isolated gate pulses are providedto fire the six number of SCRs.

* One Potentiometer provided to varythe frequency of the inverter from10Hz - 50 Hz

* One Potentiometer provided to varythe frequency of the inverter

* All gate pulses are Isolated by pulseisolation transformer

* Six SCRs rated 1200V/25A provided* Six Diodes rated 1200V/6A provided

* 6 Nos. of Commutating capacitors and3 Nos. of center tapped inductors(Rating at 120mH, 4A) provided.

* All 6 Nos. of SCRs, Diodes,Capacitors & Inductors forms 3 phaseinverter with 180 mode conduction

* DC Input of inverter fed from threephase SCR converter.

11. T H R E E P H A S E C Y C L OCONVERTER (PEC14HV11)

* This module is designed for threephase half wave - step downcycloconverter.

* It consists of 18 Synchronized firingpulses, 18 SCRs, Relevant powersupply and circuitry for frequencydivisions.

Main Circuit :

* 18 Nos SCR with RC snubber protectionis provided for 3N cycloconverter powercircuit (each phase consist of 6 SCRs)Rated at 1200 V @ 25 Amps.

* 3 Nos center tapped inductor (0%. 50%,100%) is provided for power circuit.

* 18 Nos isolated gate pulses for SCRpower circuit.

* One potentiometer is provided to varythe frequency.

* One potentiometer is provided to varythe output voltage.

* MCB protection.* Housed in sleek screen printer cabinet.* Provision for V/F control

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Power Supply :* Input 440V 10%, 50Hz three phase

AC supply.* 15V DC, 9V, 9V,9V AC(3N) for the

firing circuits.

Output Ranges : * Frequency Variation : 1 Hz to 1/3 rd of

supply frequency (Approx : 1 Hz to16Hz)

* Voltage Variation : 0 to 90% of supplyvoltage.

12. T H R E E P H A S E D I O D EC H A R A C T E R I S T I C STRAINER(PEC14HV5D)

* It consists of 6 Nos. of power dioderating at 1200V, 25Amps

* All diodes A,K terminals areterminated individually for differentconfiguration.

* Fuse provided for protection* MCB Provision for 3N ON/OFF.* Three phase step down transformer

provided for low voltage operation.# Input : 230V,230V,230V,3N# Output : 24,24,24,3N, 3Amps.

* 4 Nos. of Hall effect current sensorprovided to measure input current andoutput current.

* One no. of hall effect voltage sensorprovided to measure the output voltage

Experiments :# 3N Half wave rectifier Common

Cathode arrangement with R Load# 3N Half wave rectifier Common

Anode arrangement with R Load# 3N Bridge rectifier with R Load.

5. SCR BASED AC/DC DRIVES1. DC MOTOR SPEED CONTROL

TRAINER (PEC04)

* This trainer is designed to drive the 1 HPDC motor (optional) both open loop andclosed loop.

* Both armature control and field controlfacility provided.

* It consists of SCR based fully controlledconverter for armature voltage variation(0 - 200V DC variable, 5Amp capacity ).

* One no. SCR based fully controlledconverter for field voltage adjustment(100 - 220V DC variable, 1 AMP).

* Two sets of op-amp based lineartriggering circuit for SCR voltage.

* One no. rotary switch to select openloop, closed loop-1 and closed Loop-II.

* Two Nos potentiometer used to varyarmature & field voltage.

* Over current & field failure protectionprovided. MCB for input ON/OFF.

* Shut down status indicator and resetswitch for protection circuit.

* One no. Hall - effect current sensor forcurrent feed back, closed loop andprotection.

* One no. digital speed indicator toindicate set speed and actual speed.

* One no. toggle switch to select thefeedback circuitry.

* Provision to control the motor speedthrough external [0 - 5V] DC source.

* 230V, 50Hz AC input, +15V / -15V DCfor control circuits

SUGGESTED EXPERIMENTS1. Open loop armature control of DC

shunt motor .2. Closed loop armature control of DC

shunt motor (speed / current feedback)3. Field control of DC shunt motor.

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2. SPEED CONTROL OF SINGLEPHASE INDUCTION MOTOR(PEC14HV4C)

* This trainer is designed to drive thesingle phase AC induction motor oruniversal motor using SCR based V / Fcontroller. (open / closed loop).

* SCR Based single phase converter andinverter forms V / F controller.

* Variable voltage achieved by controllingthe firing angle of SCR converter.Variable frequency achieved bycontrolling the firing pulse frequency ofSCR Mc-Murray inverter.

SCR CONVERTER AND FIRINGCIRCUIT

* Op-amp based linear firing circuit gives0 - 180d firing angle variation.

* One no. potentiometer used to vary thefiring angle adjustment.

* All four pulses isolated by pulsetransformer and terminated in the frontpanel.

* Four Nos TYN1225 SCR forms singlephase fully controlled converter with LCFilter gives 300V DC to SCR inverter.

* MCB and fuse (DC side) provided forover current protection.

SCR MC-MURRAY INVERTER ANDFIRING CIRCUIT

* IC based firing circuit with variablefrequency (10 - 50Hz).

* [0 - 5V] DC adjust the firing anglefrequency. Four Nos Firing pulse withpulse transformer isolation terminated inthe front panel.

* Four Nos TYN612 SCR and four Nosdiode forms power circuit. Four no.Capacitor and two Nos Center tappedinductor for commutation.

* Separate control circuits for adjusting V/ F ratio. Provision to control the V / Fratio in external [0 - 5V] DC (closedloop)

* Input : 230V AC* Output : [0 - 230V] variable AC and

[10-50Hz] variable frequency* Current : 7.5Amp

3. SPEED CONTROL OF THREEPHASE INDUCTION MOTORCONTROLLER USING SCRINVERTER (PEC14HV5C)

* This trainer is designed to drive the threephase AC induction motor using SCR basedV/F controller. (open / closed loop).

* SCR based three phase converter andinverter forms V / F controller.

* Variable voltage achieved by controlling thefiring angle of SCR converter. Variablefrequency achieved by controlling the firingpulse frequency of SCR Mc-Murrayinverter.

SCR CONVERTER AND FIRINGCIRCUIT

* Op-amp Based linear firing circuit gives[0-180d] firing angle variation.

* One no. potentiometer used to vary thefiring angle adjustment.

* All six pulses isolated by pulsetransformer and terminated in the frontpanel.

* Six Nos TYN1225 SCR forms singlephase fully controlled converter with LCfilter gives 600V DC to SCR inverter.

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* MCB and fuse (DC side ) provided forover current protection. DC voltmeterprovided for DC rail voltagemeasurement.

SCR MC-MURRAY INVERTER ANDFIRING CIRCUIT

* IC Based three phase firing circuit withvariable frequency (10 - 50 Hz).

* [0 - 5V] DC adjust the firing anglefrequency. Six Nos Firing pulse with pulsetransformer isolation terminated in the frontpanel.

* Six Nos TYN612 SCR and six Nos diodeforms power circuit. six Nos capacitor andthree Nos center tapped inductor forcommutation.

* Separate control circuits for adjusting V / Fratio. Provision to control the V / F ratio inexternal [0 - 50V] DC (closed loop).

* Input : 440V AC 3 phase* Output : [0 - 415V] variable AC and

[10-50 Hz] variable frequency* Current : 5Amp.

4. SPEED CONTROL OF DC SHUNTMOTOR USING THREE PHASEF U L L Y C O N T R O L L E DCONVERTER (VPET-301)

This set-up is designed for speed control of dcmotor both armature and field control method.Separate PID controller can be used forarmature closed operation.

It consists ofa. SCR based three phase fully controlled

converter for dc motor armature circuit.b. Scr based single phase half controlled

converter for motor field circuit

c. Digital PID controller for closed loopoperation

d. 1 hp 440vdc shunt motor set-up. a. Scrthree phase fully controlled converterfor armature voltage variation:

* Three number of TCA785 phase controlic provided for three phase scr firingpulse generation.

* One number of potentiometer providedfor firing angle variation(180-0degree).

* Three phase step-down transformerprovided for supply synchronization.

* Six number of Pulse transformerprovided for scr pulse isolation

* One number of Spdt switch provided forpulse on/off.

* All six pulses are terminated on the frontpanel for power circuit connection.

* Test points provided for wave formmeasurement.

* Connector provided for external 0-5vcontrol ( for closed loop operation)

* One number of spdt switch provided forinternal /external mode selection.

* Six number of tyn1225 scr with suitablesnubber and heat sink provided forPower circuit.

* All six scr forms three phase fullycontrolled converter power circuit.

* Power circuit input and outputs areterminated by banana connector on thefront panel.

* Three phase mcb provided for inputon/off. With indicator

* Input : three phase 415v ac* Output: 0-550vdc,5amp

b. SCR single phase half controlledconverter for field voltage variation:

* One number of TCA785 phase controlic provided for scr firing pulsegeneration.

* One number of potentiometer providedfor firing angle variation(90-20degree).

* Single phase step-down transformerprovided for supply synchronization.

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* Two number of Pulse transformerprovided for scr pulse isolation.

* One number of Spdt switch providedfor pulse on/off.

* All two pulses are terminated on thefront panel for power circuit connection.

* Test points provided for wave formmeasurement.

* Two number of tyn1225 scr withsuitable snubber and heat sink providedfor Power circuit.

* All two scr ans diode forms single phasehalf controlled converter power circuit.

* Power circuit input and outputs areterminated by banana connector on thefront panel.Input : Single phase 230v ac Output : 100-200vdc,1amp

* Protection circuit: over currentprotection Field failure protection

c. Digital PID controller for closedoperation.

* Intel 8051 Microcontroller based CPUcard

* 2 Row x 16 Column LCD Dot Matrixwith back light Display AlphanumericDisplay

* single Channel Single ended Analog Input Range : (0-5)V DC

* Single Channel Analog Output (0-5)Volt

* One I/V Converter and V/I converterprovided

* 4 Number of keys provided to give setpoint, increment, Decrement functionetc.

* In-Built IC regulated power supply* Provision to change any one of the

following,Input : (0-5)VOutput : (0-5)V

d. Motor set-up* 1hp DC shunt Motor* Armature voltage-440vdc,2amp* Field voltage ------220vdc, .5amp

* Speed 1500rpm* double side shaft extension* Speed sensor with speed display and

speed feed back(0-5vdc) facility* mechanical spring balance load set-up

5. CLOSED LOOP SPEED CONTROLOF PMDC MOTOR USING SCRCONVERTER (PEC-03A)

This experiment setup consists of a 180VoltPermanent Magnet DC motor, SCR controlmodule to drive the DC motor, 3 digitdigital speed indicator and optional speedmeasurement & control module which isinterface to a Microprocessor kit or an IBMPC computer.

FEATURES:

* 180V Permanent Magnetic DC motor isprovided

* Line commutated SCR converter to feedthe armature Voltage of the DC motor

* Phase angle firing * A Potentiometer is provided for setting

the speed .* Sensor for speed sensing provided* A Digital Indicator with 3 digit LED

display for standalone operation (OpenLoop) to indicate the speed of the DCmotor

* Can Operate in i) Stand alone mode (Onlyopen loop) ii) Microprocessor controlled iii)IBM PC Computer controlled

SPECIFICATIONS :

CONVERTER : SINGLE PHASE FIRING BRIDGECIRCUIT:

# Four Isolated gate signals for FullBridge converter

# Firing Angle vary from 180 to 0through Ramp and pedestal control

# Gated carrier source at 4 KHz.

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SCR CIRCUIT : # Four thyristors are provided# Snubber circuit is provided to each

device# All gate signals are feed through

polarized connectors. # Thyristor power pack used to provide

variable field voltage of DC Motor.

OTHER FEATURES :

# One F/V converter provided to convertthe pulses of the speed sensor tovoltage

# One 3 digit display provided todisplay the actual and reference speed.

# Opto coupler is provided for coupling# Pulse transformer provided for

coupling# Pulse transformer provided to isolate

low power and high power sides of thecircuitry

APPLICATIONS :

# Study of Thyristor control of DCMotor

# Measure the speed of DC motor# Display the speed of DC Motor# Establish an open loop control# Study of DC variable Speed Drive

6. SPEED CONTROL OF DC SHUNTMOTOR USING SCR DUALCONVERTER (PEC14HV6A)

* Consists of dual converter firing circuitand SCR power circuit .

FIRING CIRCUIT (PEC14HV6A)

* Two sets of op-amp based linear firingcircuits for +ve & -ve group SCRs.

* 8 Nos of triggering pulse with 1:1 pulsetransformer isolation.

* One No. SPDT with debounce logic forall pulse ON/OFF.

* One no. toggle switch to selectcirculating/ non circulating current modeoperation.

* Two No. potentiometer used for firingangle adjustment in two modes.

* Necessary test points for control circuits.

7. DUAL CONVERTER POWERCIRCUIT (PEC14HV6B).

* Four No. TYN1225 SCR based fullycontrolled converter for +ve groupconverter.

* Four no. TYN1225 SCR based fullycontrolled converter for -ve groupconverter.

* All SCR gate pulses and necessaryterminals are brought out for externalconnection.

* One no. 120mH center tapped inductorused for IGR.


* Testing of dual converter with / withoutcirculating current mode.

8. THYRISTOR DC CHOPPER(PEC14HV7)

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* IC Based firing pulse generation totrigger auxiliary and main SCR.

* Pulse transformer provided for gatepulse isolation.

* One potentiometer used to vary the dutycycle ratio of PWM (10 - 90%).

* Two no. toggle switch with debouncelogic for ON/OFF gate pulse.

* Power circuit consists of two nosTYN1225 SCR, diode forms auxiliarySCR commutation circuit.

* Fixed L - C provided for power circuitcommutation.

* One no. diode bridge converter withfilter capacitor convert input 230V ACto DC for power circuit input.

* MCB Provided for input AC ON/OFF,over current protection.

* One no. diode converter provided forfield circuit (DC motor controlexperiment optional).

* 230V, 50Hz Input . Built in +15, -15VDC for control circuit.

* Provision to control the duty cycle ratiofrom external source voltage [0 - 5V].

* Power ON/OFF switch, necessary testpoints for firing circuits.


1. High voltage auxiliary SCRcommutated chopper with R, RL load

2. Speed control of DC shunt motorusing SCR chopper.

9. SPEED CONTROL OF SINGLEPHASE INDUCTION MOTORUSING CYCLO CONVERTER(PEC14HV9)

This module is designed for center taptransformer Cyclo Converter.It consists of 4 synchronized firing pulses, 4SCRs, Relevant Power supply etc, forfrequency division of 1,2,3 & 4.

Main Circuit

* 4 SCRs : Rating 1200V @ 25Amp* 4 Synchronized firing pulses to trigger

SCRs * Digital firing for frequency division of

1,2,3 & 4.

Power Supply* Input 230V 10%, 50Hz single phase

AC* 15V DC @ 0.5A regulated output for

the trigger circuits.* Center tape Transformer.

Output

* 0-230Volt AC* Frequency : 50/2 HZ, 50/3 HZ & 50/4

HZ.* The output can be loaded with R,L or

AC MOTOR (0.5hp).

Experiment :

* Study of Speed control of AC motorusing Cyclo Convertor.

10. SPEED CONTROL OF THREEPHASE SLIP RING INDUCTIONMOTOR USING STATIC KRAMERDRIVE (PEC16HV10B)

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This setup designed for open loop speedcontrol of 3 phase Slip Ring induction motorusing SCR converter & inverter circuit.

* It consists of three major parts namely,# SCR 3 phase inverter# SCR 3 phase inverter firing circuit# Slip ring induction motor setup with

rotor converter circuit & RL For DCfiltering

SCR 3 phase Inverter :* It consists of 6 Nos. of SCRs rated at

1200V, 50Ampwith suitable heat sinksto form 3 phase fully controlledconverter work as a 3phase inverter (" >90)

SCR 3 phase inverter firing circuit :

* Six Isolated gate signals for Full BridgeConverter.

* Firing Angle variable from 180 to0through Ramp and pedestal control.

* Gated carrier source at 4 KHz.* Housed in a Sleek cabinet.* Test points are provided on the front

panel for detailed study of circuit signalsby the student.

* Necessary test points are terminated atsockets so that the student can monitor/measure/study the signals using CRO,DVM, etc.,

* One potentiometer to vary the firingangle.

* One ON/OFF switch with indicatorprovided to power the control circuitryso that the students can monitor all thetest points of the control circuitry forcorrect functioning.

Slip ring motor with diode bridgerectifier :

* 3 phase 3 hp slip ring induction motor# Make : Benn# Volts : 400/440V, 3 phase, 50 Hz# 2.2 KW (3 hp), RPM : 1440# 4.5 Amps# Rotor Volts : 210 Volt

# Rotor Current : 6 Amps* One no. of 3 phase bridge rectifier is

provided to convert rotor circuit volt13%, 210V to DC

* One no. of 'L' & 'R' provided for DCfiltering

* Necessary test points provided for easystudy

* Entire control circuit mounted inside acompact box

* Mimic circuit is drawn in the front panel* Many test points are provided along with

front panel* A Nice text-lab manual is provided* Power Supply :

# Input:230V 10%, 3 phase AC# 15V DC @ 0.5A regulated output for

the control circuitry.

11. D C S E R I E S M O T O RCONTROLLER USING JONESCHOPPER (PEC14M21A)

This setup designed for open loop & closedloop speed control of DC Series motor usingSCR Jones chopper circuit.

It consists of,

a. SCR Jones chopper firing and powercircuit

b. DC Motor setupc. Digital PI Controllerd. Isolation transformer.

a. SCR Jones chopper firing and powercircuit:

* Two nos. SCR with RC snapperprovision

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* Two nos. Diodes and one fixed loadresistor

* One center tapped (0%, 50%, 100%)inductor (120mH) for power circuit withone commutating capacitor

*Two isolated firing pulses to fire SCR* Two nos. Toggle switches to switch ON

Auxiliary SCR pulse and main SCRpulse

* One 300V Fixed DC Supply for powercircuit and one toggle switch to ON/OFFDC supply

* All input and outputs of Power circuitcomponents (SCR DIODE, LOAD) areterminated in a PCB for student patching

* Necessary test points for study of firingcircuit

* One Potentiometer for Dutycyclevariation.

b. DC Series Motor* 1hp * Armature voltage-220vdc,5amp* Speed 1500rpm* Double side shaft extension* Speed sensor with speed display and

speed feed back(0-5vdc) facility* Mechanical spring balance load set-up

c. Digital PID controller for closedoperation.

* Intel 8051 Microcontroller based CPUcard

* 2 Row x 16 Column LCD Dot Matrixwith back light Display AlphanumericDisplay

* single Channel Single ended AnalogInput Range : (0-5)V DC

* Single Channel Analog Output (0-5)Volt

* One I/V Converter and V/I converterprovided

* 4 Number of keys provided to give setpoint, increment, Decrement functionetc.

* In-Built IC regulated power supply

* Provision to change any one of thefollowing,

Input : (0-5)VOutput : (0-5)V

12. AC SERVO MOTOR POSITIONCONTROL TRAINER (PEC - 02)

This trainer designed for versatileapplications/Experiments mentioned above.It consists of,

* An AC Servo motor mounted on a openframe

* Power driver to control speed of themotor

* To study speed servo control of ACservo motor.

* One Optical sensor provided for speedsensor and display on a 3 digit display

This trainer system is a compact & advancedversion for class room experiment set up forthe students to operate and study a practicalspeed measurement using AC Servo motor.

FEATURES:

* One 230V/11.5 (Control Voltage) Twophase AC servo motor mounted on aopen frame

* Speed Range : 0 to 1500 RPM geareddown in 1:30 ratio

* One Optical sensor coupled to shaft tomeasure speed.

* AC Servo Motor's speed is controlled byvarying control voltage (11.5V)

* Direction of the motor is varied by phasereversal of the control voltage

* Mechanical loading arrangementprovided

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POWER SUPPLY :

* Input 230V 10%, 50Hz, Single phaseAC

* 15V at 0.5A DC regulated output forcontrol circuitry

EXPERIMENTS :

* Speed measurement of AC servo motorusing optical sensor.

* Study of closed loop control of a ACservo motor

* Study of Characteristics of AC servomotori. Speed Vs Armature Voltage ii.

Speed Vs Torque iii. Armaturecurrent Vs torque

* To determine the transfer function of theAC servo motor.

13. OPEN/CLOSED LOOP SPEEDCONTROL AND TRANSFERFUNCTION OF AC SERVOMOTOR TRAINER (PEC 00A)

* This trainer is designed to drive the twophase AC servo motor both open loop andclosed loop. And study of transferfunction of motor.

* Two phase AC servo motor :Main winding voltage : 230V ACControl winding voltage : 12V ACSpeed : 1500RPMMechanical loading arrangement.

* Speed sensor (optical type) fixed onthe motor shaft for feedback & speeddisplay.

* It consists of SCR based AC regulatorfor control winding voltage variation(0 - 12V AC variable, .5Ampcapacity).

* Op-amp based linear triggering circuitfor SCR AC regulator.

* One no. toggle switch to select openloop, closed loop-operation.

* One no. digital speed indicator toindicate set speed and actual speed.

* Provision to control the motor speedthrough external 0 - 5V DC source.

* 230V, 50Hz AC input, +15V / -15VDC for control circuits.


1. Open loop speed control of ACservo motor

2. Closed loop speed control of ACservo motor

3. Transfer function of AC servo motor

14. TRANSFER FUNCTION OF ACSERVO MOTOR (VPET - 302)

This setup consists of

i. 100W Two phase AC servo motorsetup

ii. Variable AC voltage source

i. 100W Two Phase AC servo motorsetup

* Main winding voltage 230V AC* Control winding voltage 0-230V AC

(90 phase shift)* Optical speed sensor for speed

measurement

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* Belt type mechanical loadingarrangement

* Speed (0-1500 RPM)* Power - 100W

ii. Variable AC voltage source

* One number of 1 M,1 Amp Autotransformer provided to vary 0-230VAC for control unit

* One number of Phase shift transformerprovided for 90 Phase shifting of mainwing voltage

* Fuse provided for CW over currentprotection

* Illuminated power ON/OFF switchprovided for CW & MW voltage input

* One No. of digital ammeter provided forcontrol winding current measurement

* One No. of Digital voltmeter providedfor contro l winding voltagemeasurement

* One No. of MC Based digital speedindicator for motor speed measurement

* 3 M Input, all are mounted on a nicecabinet

* One no. of Experimental manual

List of Experiments

* Measurement of motor transferfunction

* Speed control of AC servo motor

15. TRANSFER FUNCTION OF DCSERVO MOTOR (VPET - 300A)

This setup consists of,a. 100W DC Separately excited DC

servo Motor setupb. Variable AC/DC source with meter

setup

a. 100W Separately Excited DC Servo Motor :* Armature Voltage : 0-48V DC, 2.7 Amp* Field Voltage : 0-48V DC* Shunt type separately excited* Speed : 1500 rpm* Rating : 100W* One Optical Encoder provided to sense

the speed* One 3 Digital Display provided to

display the speed* Double side shot extension with speed

indication* Mechanical loading arrangement

b. Variable AC/DC Source :* One no. of LM723 based 0-50V/3A

Variable DC Source with Short circuit,Over load protection for Armature Voltagevariation

* One no. of LM723 based 0-50V/1A DCVariable source with short circuit, Overload protection for field section

* One no. of Isolated 0-50V AC/1Ampvariable AC source for motor inductancemeasurement.

* One no. of DC digital voltmeter (0-50V)provided for Armature voltagemeasurement

* One no. of DC digital ammeter (0-5A)provided for Armature currentmeasurement.

* One no. of (0-50V) DC digital meterprovided for Field Voltage measurement

* One no. of (0-2A) DC digital ammeterprovided for field current measurement

* One no. of (0-50V)AC digital Voltmeterfor AC Voltage measurement

* One no. of (0-1)A AC digital ammeterfor AC current Measurement

* One no. of Digital stop-clock providedfor time.

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List of Experiments :* Determination of Armature & Field

parameters* Determination of Motor mechanical

parameters* Derivation of "Transfer Function" of

Separately excited Motor.

b. Transfer function of DC Servo MotorThis setup consists of,

a. 100W DC Separately excited DCservo Motor setup

b. Manual.

a. 100W Separately Excited DC ServoMotor :

* Armature Voltage : 0-48V DC, 2.7Amp

* Field Voltage : 0-48V DC* Shunt type separately excited* Speed : 1500 rpm* Rating : 100W* One Optical Encoder provided to sense

the speed* One 3 Digital Display provided to

display the speed* Double side shot extension with speed

indication* Mechanical loading arrangement

b. Manual :* Detailed Experimental Manual provided

to explain :# To measure the motor parameters# Determination of Transfer function.

16. DC MOTOR / GENERATORTRANSFER FUNCTION STUDYTRAINER (PEC14HV1)

* This trainer is designed to drive the 1HP DCmotor (optional), So that varies parametersof DC motor/generator can be foundexperimentally.

* It consists of SCR based fully controlledconverter for armature voltage variation (0- 200V DC variable , 5 AMP capacity).

* One no. SCR based fully controlledconverter for field voltage adjustment(100 - 220V DC variable, 1AMP).

* One no. SCR based AC regulator for motor/ generator winding inductancemeasurement (0 - 100V, 1AMP variable).

* One no. diode bridge converter for DCgenerator field voltage (200V fixed)

* Four Nos DPM for armature current,voltage and field current, voltagemeasurement.

* Two Nos DPM for AC regulator outputvoltage, current measurement.

* Three no. potentiometer used to varyarmature, field, AC voltage.

* Over current, field failure protection. MCBfor input ON/OFF.

* Shut down status indicator and reset switchfor protection circuit.

SUGGESTED EXPERIMENTS1. Determination of transfer function of

armature controlled DC motor.A. Speed Vs Armature - voltage

transfer functionB. Speed Vs torque transfer functionC. Armature current Vs voltage

transfer functionD. Current Vs torque trans function.

2. Determination of transfer function offield controlled DC motor.

17. WARD - LEONARD SPEEDCONTROL SYSTEM OF DC SHUNTMOTOR(PEC14HV2)

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* This trainer is designed to drive the 1HPDC motor (optional) using ward Leonardsystem so that varies parameters of DCmotor can be found experimentally.* It consists of ,

(1). 1HP AC motor coupled with 1HPDC generator.

(2). 1HP DC motor with mechanicalloading arrangement.

* It consists of SCR based fullycontrolled converter for field voltagevariation (0 - 200V DC variable, 1AMP)of DC generator.

* One no. SCR based AC regulator formotor / generator winding inductancemeasurement. (0- 100V AC, 1AMPvariable)

* One no. diode bridge converter for DCmotor filed voltage (200V fixed).

* One no. DPM for field voltagemeasurement.

* One no. potentiometer used to vary fieldDC voltage. One no. toggle switch toreverse the voltage.

* Over current, field failure protection.MCB for input ON/OFF.

SUGGESTED EXPERIMENTS1. Determination of transfer function of

armature controlled DC motorA. Speed Vs Armature - voltage

transfer functionB. Speed Vs torque transfer functionC. Armature current Vs voltage transfer

functionD. Current Vs torque trans function.

18. MICRO CONTROLLER BASEDSLIP RING INDUCTION MOTORSPEED CONTROL USING STATICKRAMMER DRIVE (PEC16HV10B)

This is designed for microcontrollercontrolled static slip power recovery drivein constant torque mode for steady stateand transient state analysis includingeffects of core loss and saturation.

This hardware will be suitable for speedcontrol of Slip Ring Induction motor andmonitoring many motor parameters forresearch purpose. The full system consists ofa 3 phase slip ring induction motor coupledwith a DC Generator for Electrical loading,a 3 phase converter to convert the rotoroutput to a DC link voltage , a R-L filter tosmoothern & reduce the ripple in the DCoutput voltage of the converter. A 3 phaseline commutated thyristorised invertercontrolled by a Microcontroller basedsystem. The microcontroller based system ismeant to provide firing pulses to thyristorsof the inverter & motor, all motorparameters etc.

VPC - 51 with Add-on cards (8051 basedMicrocontroller system) controls, measures& monitors all Analog & Digital inputs &Outputs. AD/DA card monitors all motorparameters like Current, Voltages etc. ASeparate dual ported RAM is provided forfast transfer of all parameters (Motorcurrent, Voltage, Speed etc.,) to the PC fordisplaying Graphically. The digitized datasare stored in the Dual ported RAM to be sentto IBM PC through RS232C port fordisplaying these on the CRT screengraphically and for further analysis.

Detailed Specifications:

* Slip Ring Induction Motor : 3 H.P, 3Phase 400V/440V, 50Hz, 2.2 KW,R.P.M 1440, Amp (4.5) with suitablerotor volts 210V or so and current 6 amprating continuously coupled withappropriate DC (3 H.P, 2.2KW) machinefor electrical loading purpose through aresistive/lamp load

# Make : Benn# Volts : 400/440V, 3 phase, 50 Hz# 2.2 KW (3 hp), RPM : 1440# 4.5 Amps# Rotor Volts : 210 Volt# Rotor Current : 6 Amps

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* DC Generator as Load :

# Make : Kirloskar /GramptonGreaves

# 5 hp, 1500 rpm# Resistive load of 4 KW provided

* Both Slip Ring Induction motor and DCGenerator are coupled together. Oneoptical encoder is provided for the speedmeasurement. The output of opticalencoder is signal conditioned & calibratedto indicate the speed of the motor &display on a 3 digit display.

* Converter - Inverter unit for slip powerrecovery scheme with inverter beingMicrocontroller controller (8051) thyristor[PIV = 1200V, Current 25 Amp.] havinga filter (R-C) in between for filteringr i p p l e s o f o u t p u t D C o fconverter/uncontrolled rectifier.

* Converter :# 6 Diodes, 120 volt PIV, 25 Amp to

form the bridge# Fuse provided.

* Inverter :# 6 Thyristors, 1200 Volt PIV @ 25 amp# The SCRs are mounted on suitable

heat sinks and Snubber circuit isprovided to each device.

* One 3N Transformer provided to feedbackthe recovered power to the line. One AutoTransformer provided, controls manuallythe power feed back to the line.

* Power meters provided at various points tomonitor to power consumed.

* A power control panel is provided to fixvarious Volt meters, Current meters, andPower meters.

* The panel consists of a) Auto Transformerb) ON/OFF Switchc) Volt meterd) Current metere) Switches to select various options.f) One Volt meter, One Current meter

to show the generator Voltage outputand Current output.

* 3 Ammeters to show the 3 phasecurrents of Inverter output.

* One Ammeter and One Voltmeter toshow the Current and Voltage output ofthe Converter.

* 3 Ammeter provided to show the 3NCurrent outputs of Rotor.

* 3 Ammeter provided to show the 3NCurrent outputs of Stator.

* 3 Ammeter and One Voltmeterprovided to monitor the 3N current inputfrom the line.

* Hall-effect current transducer areprovided to measure i. Stator Currents,ii. Rotor Currents iii. Converter OutputCurrent iv. Inverter output currents

* Hall-effect voltage transducer areprovided to measure voltages at variouspoints of the experimental setup (Fig.4).

* Necessary test points provided forobtaining oscillographic waveformrecord of supply voltage, supply current,stator voltage, stator current, DC linkvoltage, DC link current, inverterfeedback current and rotor currentwaveforms.

The above setup is able to measure thefollowing parameters,

a. Steady state Behaviour of Driveb. Transient state Behaviour of Drive

The Software has provision to record thefollowing in the computer and graphicalhard copy can be taken.

1. No Load speed Vs. firing anglecharacteristics

2. Torque - speed characteristics atdifferent firing angle [95 to 160 instep 10 or by user setting]

3. Torque (2P.U) Vs. DC link current (0 P.Uto 3.75 P.U at firing angle 95 to 145)

4. Full load supply current Vs. slipcharacteristics at firing angle 95 to 145

[Here supply current is computed as phasor sumof stator current and inverter current on A.Cside]

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5. Supply power factor Vs. slip (P.U)Characteristics at different firing angle

6. System efficiency Vs. slip curves atdifferent angle at full load

# Determination of Transfer function

19. DSP BASED STATIC KRAMMERDRIVE (PEC16HV10C)

It consists of three major parts namely,* SCR 3 phase inverter* DSP Based inverter firing circuit* Slip ring induction motor setup with

rotor converter circuit & RL For DCfiltering

SCR 3 phase Inverter :* It consists of 6 Nos. of SCRs rated at

1200V, 50Amp with suitable heatsinks to form 3 phase fully controlledconverter work as a 3phase inverter ("> 90)

DSP Based inverter firing circuit :

* TMS320F2407A DSP Based firingcircuit.

* Six Isolated gate signals for FullBridge Converter.

* Firing Angle variable from 180 to0through Ramp and pedestal control.

* Gated carrier source at 4 KHz.* Housed in a Sleek cabinet.* Test points are provided on the front

panel for detailed study of circuitsignals by the student.

* Necessary test points are terminated atsockets so that the student canmonitor/ measure/study the signalsusing CRO, DVM, etc.,

* One potentiometer to vary the firingangle.

* One ON/OFF switch with indicatorprovided to power the controlcircuitry so that the students canmonitor all the test points of thecontrol circuitry for correctfunctioning.

Slip ring motor with diode bridgerectifier :

* 3 phase 3 hp slip ring induction motor# Make : Benn# Volts : 400/440V, 3 phase, 50 Hz# 2.2 KW (3 hp), RPM : 1440# 4.5 Amps# Rotor Volts : 210 Volt# Rotor Current : 6 Amps

* One no. of 3 phase bridge rectifier isprovided to convert rotor circuit volt13%, 210V to DC

* One no. of 'L' & 'R' provided for DCfiltering

* Necessary test points provided for easystudy

* Entire control circuit mounted inside acompact box

* Mimic circuit is drawn in the front panel

* Many test points are provided alongwith front panel

* A Nice text-lab manual is provided* Power Supply :

# Input:230V 10%, 3 phase AC# 15V DC @ 0.5A regulated output

for the control circuitry.

6. STANDALONE SCR TRAINERS

1. UJT CHARACTERISTIC ANDOSCILLATOR STUDY MODULE(PEC14M5)

This module has been designed to study anddemonstrate the building up a UJTRelaxation Oscillator and use this circuit totrigger a SCR. This circuit also provides aTime Delay. Most of the circuit points areterminated on SPRING, the individualcomponents can be inserted externally bystudents, which makes a student a deepunderstanding in the UJT Relaxation circuit.

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* UJT Relaxation Oscillator is used togenerate triggering pulses for SCR.

* By using UJT Relaxation Oscillatorthe SCR is working as a ON DELAYTIMER and AC Regulation.

* Circuits to study UJT RelaxationOscillator.

* Most of the circuit points areterminated on spring so thatcomponents can be inserted externally.

* Maximum components can be insertedthrough spring termination externallyfor students study .

* 3 Sockets are provided to insertexternally a SCR.

* One External Transformer provided ;230V Input, O/P 24-0-24V AC@1Amp.

* Housed in a sleek box.

Applications:

1. Study of UJT Relaxation Oscillator.2. Study of ON Delay Timer.3. AC Regulator using SCR

2. DIGITAL MEASUREMENT OFPHASE ANGLE (PEC14M19)

* Measurement of phase differentbetween 2 sine waveform

* Resistor - Capacitor (RC) circuit toshift one waveform up to 90 tostimulate phase difference

* One 3 Digit display to display0-90phase angle

* Input signal sources

POWER SUPPLY

# Input 230V 10%, 50Hz singlephase AC

# 15V DC @ 0.5A regulated outputfor the trigger circuits.

3. AC SOLID STATE RELAY USINGOPTO-COUPLER ISOLATION(PEC14M10).* 555 IC used to generate triggering

pulse to SCR/TRIAC.* 6N137 opto used to isolate the gate

signal.* SCR based AC regulator triac based

AC regulator.* TYN612 SCR, BTA12 TRIAC used as

a power device.* Connector provided external

5V/15VDC input.* Lamp used as a load.* Input : 230VAC.* Output : 230V AC, 5AMP* Control signal 5V/15VDC

4. SCR RING COUNTER (PEC14M11)

* Five Nos SCR used as a power device.* Five Nos lamp used (as a load) to view

ring counter operation.* Auto / manual mode of operation.

* One no. SPDT switch to select manual /auto mode of operation.

* 555 IC based as table multivibrator forauto mode operation.

* One no. push - to on switch provided formono stable input trigger.

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* One no. reset switch to re - start theoperation.

* Transistor based pulse amplifier forpulse amplification.

* One no. bridge rectifier converters 230VAC to DC with filter circuits for SCRpower circuit input.

* Five Nos AC capacitor used for SCRcommutation.

* 230V AC input, 15V DV for controlcircuit.

SUGGESTED EXPERIMENTS1. Testing of SCR ring counter in auto

mode with different frequency.2. Testing of SCR ring counter in manual

mode.

5. FAST RECOVERY DIODECHARACTERISTICS STUDYMODULE (VPET - 304)

* This module consists of oscillatorcircuit for switching pulse generation

* One BJT driver* One BJT for power switching* One Fast Recovery diode * One slow regulated diode module /

rating 700V/1A* One 24V regulated DC voltage for

power switching* One mains ON/OFF switch for

control circuit* One min, max switch for frequency

selection* Test points provided to test the

waveform mounted on a front panel.* Schematic diagram is screen printed in

the front panel.

6. AC PHASE CONTROL USING SCR,TRIAC & DIAC (PEC14M22)

* It consists of UJT firing circuit & SCR ACregulator, DIAC firing circuit with TRIACAC regulator.

Ujt Firing Circuit with Scr Ac Regulator* Line synchronized UJT triggering

circuit, line synchronization achieved by230V / 9V step down transformer.

* Built in 24V AC for firing circuit input.One Nos Toggle switch to ON/OFF24V AC.

* One no. Potentiometer used to vary thefiring angle [10 - 170degree].

* 1:1:1 Pulse transformer used for gatepulse isolation.

* Pulse outputs are terminated in the PCBfor external connection.

* Two Nos TYN612 SCR connected inantiparallel forms SCR AC regulatorwith termination.

Diac Firing Circuit with Triac AcRegulator

* One no. Potentiometer and differentvalues of capacitor and one no. DIACforms DIAC firing circuit.

* Two Nos Toggle switch to selectdifferent value of capacitor.

* One no. BTA12 TRIAC used as a ACregulator with termination.

* One no. 100W lamp used as a load.

SUGGESTED EXPERIMENTS* SCR AC regulator using UJT firing

circuit.* TRIAC AC regulator using DIAC firing

circuit.

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7. SCR DC CIRCUIT BREAKER(VPET - 100)

* SCR Based Complementary commutatedchopper used as a DC circuit breaker.

* Two Nos TYN612 SCR with heartsickused for main and auxiliary SCR.

* One no. AC capacitor used forcommutation.

* One no. fixed resistor used as load forauxiliary SCR circuit.

* One no. current sensing resistorprovided in main SCR for load currentsensing.

* Three Nos SPDT provided for loadcurrent variation.

* One no. push-to on switch to on themain SCR.

* One no. push-to on switch to auxiliarySCR (to off main SCR).

* Two Nos LED to indicate the two SCRon status.

* One no. DC ammeter (0 - 3Amp) forload current indication.

* One no. 30V DC , 3Amp unregulatedpower supply for circuit breaker input.

* One no. toggle switch to ON/OFF DCpower supply. Fuse provided for protection.

* All are mounted on a nice wooden cabinet.

SUGGESTED EXPERIMENTS1. Testing of DC circuit breaker with

different current setting.

8. ZERO VOLTAGE SWITCHINGUSING SCR/TRIAC (PEC14M9)

HARDWARE DETAILS* Model : PEC14M19* Integrated circuit based (3059/3079)

ZVS circuit

* Power circuit consists of one SCR andone TRIAC user can select either onedevice at a time.

* 24V AC Operation * External Resistor/Lamp load provided* All output of IC's provided by banana

connectors, so users can patch andstudy ZVS.

* One No Pot. is provided for vary thefrequency of Ramp (

1_power electronics catalogue

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