hendrik spies, product marketing manager, may 2013 ... · example application diagram ; fuses for...

© ABB Group 1SFC132018N0201, May 6, 2013 | Slide 1

Variable speed drive or soft starter ?

Hendrik Spies, Product Marketing Manager, May 2013

© ABB Group May 6, 2013 | Slide 2

Motor Starter Options


Motor Starter Options Variable Speed Drives


Motor Starter Options Soft Starters


Motor Starter Options Soft Starter Functionality


Motor Starter Options Comparison Between Starting Methods


Pump systems Different Pump systems


The great softstarter offer from ABB PSE - The New Efficient Range

PSE – The Efficient range

- Water & Wastewater / Pumps and other applications

- Cost and space efficient

- All the most important functionality

- Torque control

PSS

PSR

PST/ PSTB


PSE - User Interface The first compact softstarter with LCD display!

4 status indication LEDs Green - Ready Green - Run Yellow - Protection Red - Fault

User friendly 4-button keypad with clear functions

Illuminated display

Easy to identify - All data available on the

front

Four positions showing values and messages

Icons for showing functions, units etc – Language neutrual

Clear terminal markings

Possible to lock the keypad to prevent

parameters from being changed

Overload

Underload

Locked rotor

Fieldbus


Available functions (top row from left to right)

Available functions (bottom row from left to right)

PSE - User Interface Settings / Available functions

Setting current

Start ramp

Stop ramp

Initial / end voltage

Current limit

Torque control for start

Torque control for stop

Kick start


PSE - General product information Electrical ratings

Softstarter size kW-rating (400V) hp-rating (480V) PSE18 7,5 kW 10 hp

PSE25 11 kW 15 hp

PSE30 15 kW 20 hp

PSE37 18,5 kW 25 hp

PSE45 22 kW 30 hp

PSE60 30 kW 40 hp

PSE72 37 kW 50 hp

PSE85 45 kW 60 hp

PSE105 55 kW 75 hp

PSE142 75 kW 100 hp

PSE170 90 kW 125 hp

PSE210 110 kW 150 hp

PSE250 132 kW 200 hp

PSE300 160 kW 250 hp

PSE370 200 kW 300 hp


The principle of Torque Control Controlling the motor torque instead of the motor voltage.

Possible to control torque both during start and stop.

Torque control provides a controlled acceleration and deceleration of the machinery.

Torque controlled softstop is especially designed for pumps

PSE – Torque control

This Softstop function has been developed in close cooperation with a well known pump manufacturer.

Water flow

Time

Stop


Linear decrease of the voltage down to end voltage.

The voltage is fully controlled (both up and down) making it possible to fully control the motor output torque all the way down to zero speed.

time

U Voltage ramp

100%

time

U Torque control

100%

PSE – Torque control Comparing with normal voltage ramp

Presenter

Presentation Notes


When ramping down it is only possible to control the stop down to the maximum torque, where you will lose control of the motor.

Voltage ramp

Torque control allows you to control the stopping also after passing the maximum torque - all the way down to zero speed.

Torque control


RPM

T

RPM

T


No speed reduction during the first part of the stop ramp. Towards the end of the ramp, the motor sometimes stops too quickly, causing water hammering

More controlled deceleration of the motor from the beginning of the stop all the way down to zero speed.

time

RPM

STOP signal Torque control

time

RPM

STOP signal

Voltage ramp



PSE – Torque control Comparing different starting methods


M

V I

Pin

- Ploss Pmotor

α

Tideal

PSE Softstarter

Tmotor

PSE – Torque control Principal solution – A closed loop control


PSE - Technical product information Current limit

Current

Speed With current limit

Without current limit Used to keep the starting current on a pre-set maximum level

Especially useful for heavy duty starts such as fans and conveyor belts, where the starting times are long

Possible to set the level (1,5 – 7 xIe)

Active during start


PSE - Technical product information Kick start

Normal ramp

Ramp with kick start

U

Time

Set initial voltage Uini

Used to start for instance jammed pumps or conveyor belts

Provides enough torque during start but still ensuring a soft start

Possible to set level / time (30% – 100%)

30% Ue => 0,3 sec

35% Ue => 0,35 sec

…

100% Ue => 1,0 sec

t


PSE - Technical product information Electronic overload protection

Tim

e

Current

Class 30 Class 20 Class 10 Class 10A

Used to protect the motor from overheating

No need for external thermal or electronic overload

4 different classes available 10A – Very light start

10 – Normal start

20 – Medium start

30 – Heavy duty start

Active both during start/stop and continuous run

Needs to cool down to 60% before reset is possible

Ie


PSE - Technical product information Underload protection

I

rpm

OK

Trip

Low or Unloaded motor

Rated operational point Used to detect for instance broken belts and pumps running dry

Active after reaching TOR

Possible to set level (0,2 – 1,0 xIe)

Time delay of 10 sec


PSE - Technical product information Locked rotor protection

Tim

e

Current

Class 30 Class 20 Class 10 Class 10A

Used to detect for instance jammed pumps, conveyor belts etc

Active after reaching TOR

Provides faster protection than OL for high currents

Possible to set level (0,5 – 7,0 xIe)

Time delay of 1 sec


PSE – Technical product information Example application diagram

Fuses for short circuit protection

Line contactor

PSE Softstarter

Softstarter in line connected with the motor

2-wire or 1-wire control of the softstarter

Internal 24 V DC for control circuit

Functional ground for most reliable operation


PSE - Technical product information Accessories – Fieldbus communication

ABB Field Bus Plug

Fieldbus communication available as an option (same accessory as for PSR)

All the common protocols available

Profibus DP/V0, DP/V1

Modbus-RTU

DeviceNet

CANopen

Full control of the softstarter

Parameter settings

Start/stop

Read status information

Field Bus Plug accessorie


Different types of control 3-phase control

Benefits Soft start / soft stop Symmetrical voltage and

current Lowest starting current Possible to connect inside

delta Torque control and current limit

possible

Disadvantages Largest dimensions Highest cost when used in line

M

L1 L2 L3


Benefits Reduced price Reduced dimensions Good price / performance ratio Softstop possible Torque control now possible

(ABB patent) Current limit possible Reduced inrush current

Disadvantages Assymetrical voltage and

current during start Not possible to connect the

softstarter inside delta DC-current during start (without

ABB patent)

Different types of control 2-phase control

M

L1 L2 L3


Consequences of 2-phase control Torque control now possible

The worlds first compact softstarter with Torque Control!

No other softstarter manufacturer has torque control in a 2-phase controlled softstarter.

A special ABB algorithm makes it possible to have torque control also on a 2-phase controlled softstarters. (Patent protected)

The performance of the torque control is just as good as for a 3-phase controlled softstarter

Water flow

Time

Stop


Consequences of 2-phase control Algorithm to eliminate DC-component

ABB has developed an algorithm to fire the thyristors in a special way to compensate for the DC-component. (Patent protected)

The elimination of the DC-component will give symmetrical current and increased torque, ensuring a successful start.

This algorithm is implemented in both PSR and PSE softstarters.

Very few competitors have the same performance on 2-phase controlled softstarters and thereby having the defects mentioned above.

time Symmetrical current

Cur

rent

(AC

)

Assymetrical current time

Cur

rent

(AC

)

Without ABB patent With ABB patent

hendrik spies, product marketing manager, may 2013 ... · example application diagram ; fuses for...

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