manish ranjan ppt final

8/4/2019 Manish Ranjan Ppt Final

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SSBTS COET, JALGAONELECTRICAL ENGINEERING DEPARTMENT

A

SEMINAR

ON

DESIGN & IMPLEMENTATION OF PLC IN CONTROL OF 3

PHASE INDUCTION MOTOR

PREPARED BY

MANISH RANJAN

GUIDED BYDr. S. K. MITTAL

(PROFESSOR & DIRECTOR OF RESEARCH)


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INTRODUCTION

With the rapidly changes on industries and informationtechnologies in recent years, some traditional bulkelectronic appliances have to be monitored for a longtime.

The control of all equipment has been performed throughthe use of computer Most equipment uses PLC toconnect with computers to monitor each load andelectricity consuming devices. Programmable LogicControllers(PLC) are widely used in industrial control

because they are inexpensive, easy to install and veryflexible in applications. A PLC interacts with the externalworld through its inputs and outputs.


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*THIS USE OFFERS ADVANTAGES SUCH AS LOWER VOLTAGE DROP WHEN TURNED ON AND THE

ABILITY TO CONTROL MOTORS AND OTHER EQUIPMENT WITH A VIRTUALLY UNITY POWER

FACTOR MANY FACTORIES USE PLC IN AUTOMATION PROCESSES TO DIMINISH PRODUCTION

COST INCREASE QUALITY AND RELIABILITY.

*A POWER FACTOR CONTROLLER FOR A THREE-PHASE INDUCTION MOTOR UTILIZES PLC TO

IMPROVE THE POWER FACTOR AND TO KEEP ITS VOLTAGE TO FREQUENCY RATIO CONSTANT

UNDER THE WHOLE CONTROL CONDITIONS

*MANY APPLICATIONS OF INDUCTION MOTORS REQUIRE BESIDES THE MOTOR CONTROL

FUNCTIONALITY, THE HANDLING OF SEVERAL SPECIFIC ANALOG AND DIGITAL I/O SIGNALS, HOME

SIGNALS, TRIP SIGNALS. IN SUCH CASES, A CONTROL UNIT INVOLVING A PLC MUST BE ADDED TO

THE SYSTEM STRUCTURE.

*THIS PAPER PRESENTS A PLC-BASED MONITORING AND CONTROL SYSTEM FOR A THREE-PHASE

INDUCTION MOTOR. IT DESCRIBES THE DESIGN AND IMPLEMENTATION OF THE CONFIGURED

HARDWARE AND SOFTWARE. THE TEST RESULTS OBTAINED ON INDUCTION MOTOR

PERFORMANCE SHOW IMPROVED EFFICIENCY AND INCREASED ACCURACY IN VARIABLE-LOAD

CONSTANT-SPEED CONTROLLED OPERATION.

*THUS, THE PLC CORRELATES AND CONTROLS THE OPERATIONAL PARAMETERS TO THE SPEED

SET POINT REQUESTED BY THE USER AND MONITORS THE INDUCTION MOTOR SYSTEM DURINGNORMAL OPERATION AND UNDER TRIP CONDITIONS .


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PLC AS A SYSTEM CONTROLLER

PLC- It means that programmable logic controlling devicewhich can control plant or machine with the help of Logic.P Programmable Ram ,Rom, Eprom.L Logic The way of working /operation

C Control micro-processor, micro-controller.

The way of PLC connection:(a) pc to PLC.

(b)PLC to PLC. plc to HMI(high memory interface)

(d)MMI(machine to machine interfarance)


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Programming Language:

A. Ladder (Using in India)

B. S.T.L (Structure Text List) (Using in Abroad)

C. F.B.D (Functional Block Diagram) (Using in Abroad)

D. S.F.C (Sequence flow chart)

E. I.L. (Instruction List)


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The operation of a controller by envisioning

that it repeatedly performs three steps:

a) Reads inputs from input modules

b) Solves preprogrammed control logic

c) Generates outputs to output modules based

on the control logic solutions.


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TYPE OF PLC :

There are three types of PLC till now

MICRO

MINI

RACK

And the Latest PLC is NANO


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MICRO PLC It is having around 15 to 20 input and 10 to12 output. The input/output of the PLC

depends on the manufacturing company


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MINI PLC

It is a medium size PLC with 100 to200 input/output modules.

The modular construction in MINI PLC

is 8 or 16 bit.


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RACK PLC:

It consist of thousands of input and outputas per the requirement.

It consist of separate modules


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Control System of Induction Motor


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Then, the experimental control system was operated between no loadand full load (8, 0Nm) in the two different modes described in Section 3:a) induction motor fed by the inverter and with PLCcontrol;b) induction motor fed by the inverter.

The range of load torque and of speed corresponds tothe design of the PLC hardware and software asdescribed in the previous sections. The speed versustorque characteristics were studied in the range 5001500 r/min and are illustrated in Fig. 7. The results showthat configuration b) operates with varying speed varyingload torque characteristics for different speedset points nsp.


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Configuration a) operates with constant speed-varying load torquecharacteristics in the speed range 01400 r/min and 0100% loads.However, in the range of speeds higher than 1400 r/min and loadshigher than 70%, the system operates with varying-speed varying-load and the constant speed was not possible to be kept. Thus, for nsp 1400 r/min both con-figurationsa) and b) have a similar torque-speedresponse. This fact shows that PI control for constant speed asimplemented by the software with PLC is effective at speeds lower than93% of the synchronous speed.


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As a microprocessor-based system, the PLC system

hardware is designed and built up with the following

modules:

central processor unit (CPU);

discrete output module (DOM);

discrete input module (DIM);

analog outputs module (AOM) analog inputs module (AIM)

power supply.


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Here is thispicture showsthe conveyorsystem whereeach segment

runs by a motor.And the wholesystem isrunning throughPLC.

APPLCATION OF PLC


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ADVANTAGE:


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CONCLUSION

Successful experimental results were obtained from the previouslydescribed scheme indicating that the PLC can be used inautomated systems with an induction motor.The monitoring control system of the induction motor driven byinverter and controlled by PLC proves its high accuracy in speed

regulation at constant-speed-variable-load operation.


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THANK YOU..

manish ranjan ppt final

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