Group 26: Motor Control - ABB ACS550-01 User Manual

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Group 26: Motor Control

Code Description
2603 IR COMP VOLT
Sets the IR compensation voltage used for 0 Hz.
• Requires parameter 9904
(
SCALAR CONTROL
• Keep IR compensation as low as possible to prevent
overheating.
• Typical IR compensation values are:
400 V Units
P (kW)
N
IR comp (V) 21
2604 IR COMP FREQ
Sets the frequency at which IR compensation is 0 V.
2605 U/f RATIO
Selects the form for the U/f (voltage to frequency) ratio below field weakening point.
1 = – Preferred for constant torque applications.
LINEAR
2 = – Preferred for centrifugal pump and fan applications. (Square is more silent for most operating
SQUARE
frequencies.)
2606 SWITCHING FREQ
Sets the switching frequency for the drive.
• Higher switching frequencies mean less noise.
2607 SW FREQ CTRL
The switching frequency may be reduced if the ACS550 internal
temperature rises above 90 °C. See Figure. This function allows
the highest possible switching frequency to be used based on
operating conditions. Higher switching frequency results in lower
acoustic noise.
0 = – The function is disabled.
OFF
1 = – The switching frequency is limited according to the
ON
figure.
2608 SLIP COMP RATIO
Sets gain for slip compensation (in %).
• A squirrel-cage motor slips under load. Increasing the frequency as the motor torque increases compensates for
the slip.
• Requires parameter 9904
0 = No slip compensation.
1...100 = Increasing slip compensation. 100% means full slip compensation.
Start-Up
MOTOR CTRL MODE
).
3 7.5 15 37 132
18 15 10 4
MOTOR CTRL MODE
IR Compensation
• When enabled, IR Compensation provides an extra
voltage boost to the motor at low speeds. Use IR
= 3
Compensation, for example, in applications that require a
high breakaway torque.
P 2603
8 kHz
4 kHz
= .
SCALAR
ACS550 User's Manual
Motor
Voltage
A
A = IR Compensated
B = No compensation
B
P 2604
Switching frequency limit
90 °C 100 °C
f (Hz)
ACS5550
Temperature