Delta Electronics Network Device VFD-S Spécifications Page 31

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VFD-S Series
DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
5-14
Hz
Freq.
Motor
Speed
Stops according
to deceleration
time
Time
Hz
Freq.
Motor
Speed
Free running
to stop
Time
Operation
command
ON
ON
OFF
OFF
Ramp
Coast
Note: The motor stop method is usually determined by the characteristics of the motor load
and frequency of stops.
2 - 03 PWM Vivő frekvencia beállítása Factory Setting: d 10
Settings d 03 fc= 3KHz Unit: 1KHz
d 04 fc= 4KHz
d 05 fc= 5KHz
to
d 10 fc= 10KHz
This parameter can set the carrier frequency of PWM output.
Carrier
Frequency
Acoustic Noise
Electromagnetic
Noise, Leakage
Current
Heat
Dissipation
3KHz
10KHz
Significant
Minimal
Minimal
Significant
Minimal
Significant
! From the above table, we see that the carrier frequency of PWM output has a significant
influence on the electromagnetic noise, heat dissipation of the AC drive, and the acoustic
noise to the motor.
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