Group 26: Motor Control
This group provides controls for fine-tuning the motor control.
Table 36: Group 26: Motor Control
Code Description
Range
Resolution
Default
S
2603 IR COMP VOLT
0…100 V
1 V
Size
Dependent
Sets the IR compensation voltage used for 0 Hz .
• Requires parameter 9904 MOTOR CTRL MODE = 3 (SCALAR SPEED) .
• Keep IR compensation as low as possible to prevent overheating .
• Typical IR compensation values are:
380…480 V Units
PN (kW)
3 7 .5 15 37 132
IR comp (V) 18 15 12
8
3
IR Compensation
• 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%
1
80%
Sets the frequency at which IR compensation is 0 V (in % of motor frequency) .
2605 U/f RATIO
1, 2
1
2
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 . (Square is more silent for most operating frequencies .)
2606 SWITCHING FREQ
1, 4, 8, 12,
16 kHz
—
4 kHz
Sets the switching frequency for the drive .
• Higher switching frequencies mean less noise .
• The 1, 4 and 8 kHz switching frequencies are available for all frame sizes R1-R6 .
• The 12 kHz switching frequency is available only if parameter 9904 MOTOR CTRL MODE = 3 (SCALAR:FREQ) .
NOTE:
Selecting 12 kHz switching frequency automatically limits parameter 9906 to 0 .80 of drive nameplate FLA .
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Содержание ACS320
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