Group 60 — Motor Control
MVX9000 User Manual 5-53
Descriptions of
Parameter Settings
60.10
Slip Compensation Range: 0.00 to 10.00 Default: 0.00 for V/F
Default: 1.00 for vector
An increasing load on an asynchronous motor will cause an
increase in motor slip. This Slip Compensation parameter
may be used to compensate for the nominal slip within a
range of 0 to 10%.
When the output current of the AC drive is greater than the
motor no-load current (60.02) the AC drive will adjust its
output frequency to help keep rotor speed constant. The
maximum increase in output frequency is determined by the
setting of this parameter. A setting of 5% will increase output
frequency from 60 Hz to 63 Hz percentage.
This parameter may be set during operation.
60.11
PWM Carrier
Frequency
Range for 115V/230V/460V: 01 to 15 kHz
Default: 09
Range for 575V: 01 to 10 kHz Default: 06
The parameter selects the carrier frequency for the PWM
(Pulse-Width Modulated) function.
Table 5-1: Carrier Frequency
Carrier Frequency Acoustic Noise
Electromagnetic
Noise, Leakage
Current
Heat
Dissipation
1 KHz
15 KHz
Significant
Minimal
Minimal
Significant
Minimal
Significant
From Table 5-1, we see that the carrier frequency for the PWM
function has a significant influence on the electromagnetic
noise, heat dissipation of the AC drive, and the acoustic noise
of the motor.
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