Frequency

frequency output

motor

speed

Chapter 5 Parameters|VFD-B Series

Frequency

frequency

output

motor

speed

operation

command

stops according to

decel eration time

operation

command

free run to stop

EF

When Pr.02-02 is set to 2 or 3

EF

When Pr.02-02 is set to 0 or 1

02 - 03 PWM Carrier Frequency Selections

Unit: 1

Power

Setting Range

Factory Setting

230V/460V Series

1-5hp

7.5-25hp

0.75-3.7kW

5.5-18.5kW

01-15 kHz

01-15 kHz

15 kHz

09 kHz

30-60hp

22-45kW

01-09 kHz

06 kHz

75-100hp

55-75kW

01-06 kHz

06 kHz

Power

Setting Range

Factory Setting

575V Series

1-15hp

0.75-11kW

01-10 kHz

06 kHz

20-60hp

15-45kW

01-08 kHz

06 kHz

75-100hp

55-75kW

01-06 kHz

06 kHz

This parameter determines the PWM carrier frequency of the AC motor drive.

Carrier

Acoustic

Frequency Noise

1kHz Significant

Electromagnetic

Noise or leakage

current

Minimal

Heat

Dissipation

Minimal

Current

Wave

Minimal

8kHz

15kHz

Minimal

Significant

Significant

Significant

From the table, we see that the PWM carrier frequency has a significant influence on the

electromagnetic noise, AC motor drive heat dissipation, and motor acoustic noise.

Revision July 2008, BE16, SW V4.08 & V5.00

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