Delta Electronics Network Device VFD-S Dokumentacja Pobierz pdf (Strona 41)

VFD-S Series

5-14

Freq.

Motor

Speed

Stops according

to deceleration

time

Time

Freq.

Motor

Speed

Free running

to stop

Time

Operation

command

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 Carrier Frequency Selections Factory Setting: d 10

Settings d 03 fc= 3KHz Unit: 1KHz

d 04 fc= 4KHz

d 05 fc= 5KHz

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

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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