Delta VFD-A Series

48
Pr.71
PWM Frequency Setting
Parameter # 71
Parameter Name
PWM frequency setting
Factory Setting
d0005
Settings
d0001 fc = 3 KHz
d0002 fc = 6 KHz
d0003 fc = 9 KHz
d0004 fc = 12 KHz
d0005 fc = 15 KHz
 This parameter determines the carrier frequency for the PWM (Pulse Width
Modulation) output.
Carrier frequency Acoustic noise Leakage current Heat dissipation
3 KHz significant minimal minimal
6 KHz
9 KHz
12 KHz
15 KHz minimal significant significant
Note: For AC drives rated below 7.5 KW (10HP), the output current derating applies
above 9 KHz. For AC drives rated 7.5KW and above, the output current derating
applies above 12KHz. See figure below:
36
9
12
15
100
80
90
Carrier Frequency, KHz
% Output Current
(A)
Pr.72
Auto Reset / Restart Operation after Fault
Parameter # 72
Parameter Name
Auto reset / restart operation after fault
Factory Setting
d0000
Parameter value
d0000 - d0010
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Call 1(800)985-6929 for Sales
deltaacdrives.com
sales@deltaacdrives.com