Rockwell Automation 1305 AC Drive, Series A and B, Firmware 4.xx-5.xx - Manual (Page 92)

Chapter 5 – Programming
5-20
Advanced Set Up Group (cont.)
[PWM Frequency] Parameter # 45 Factory Default 4.0 kHz [PWM Frequency]
Parameter Type Read & Write Minimum 2.0 kHz
This parameter sets the carrier frequency for the PWM
output waveform. IMPORTANT: Output Current derating
applies above 4kHz. See Fig. 5-11. Units 0.1 kHz Maximum 8.0 kHz
Figure 5.11 PWM Frequency Derating
1 2 3 4 5 6 7 8
84
86
88
90
92
94
96
98
100
% Output Current (A)
Carrier Frequency, kHz
IMPORTANT: Ignoring derating guidelines can
cause reduced drive performance.
IMPORTANT:Changing PWM carrier frequency may result in changes in Start-up and Holding current if start boost and DC
Holding voltages are in effect. These parameters should be checked if the carrier frequency is changed and reprogrammed if
needed.