ABB ACH550-02-645A-4 [244/454] Parameter listing and descriptions

ABB ACH550-02-368A-4 [244/454] Parameter listing and descriptions
240 Parameter listing and descriptions
ACH550-02 User's Manual
2603 IR COMP VOLT 0…100 V
Sets the IR compensation voltage used for 0 Hz.
Requires parameter 9904
MOTOR CTRL MODE = 3 (SCALAR:FREQ).
Keep IR compensation as low as possible to prevent overheating.
Typical IR compensation values are:
When enabled, IR compensation provides an extra voltage boost to
the motor at low speeds. Use IR compensation, for example, in
applications that require a high breakaway torque.
2604 IR COMP FREQ 0…100%
Sets the frequency at which IR compensation is 0 V (in % of motor
frequency).
2605 U/F RATIO 1=LINEAR, 2=SQUARED
Selects the form for the U/f (voltage to frequency) ratio below field
weakening point.
1 =
LINEAR – Preferred for constant torque applications.
2 =
SQUARED – Preferred for centrifugal pump and fan applications.
(
SQUARED is more silent for most operating frequencies.)
2606 SWITCHING FREQ 1, 4 kHz
Sets the switching frequency for the drive.
Higher switching frequencies mean less noise.
In multimotor systems, do not the change switching frequency from
the default value.
Code Description Range
380…480 V drives
P
N
(kW) 3 7.5 15 37 132
IR comp (V) 21 18 15 10 4
Motor
f (Hz)
A
B
voltage
A = IR compensated
B = No compensation
P 2603
P 2604

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