Mitsubishi Electric FR-E540 Instruction Manual download pdf (Page 111)

PARAMETERS

4.2.30 PWM carrier frequency (Pr. 72, Pr. 240)

Pr. 72 "PWM frequency selection"

Pr. 240 "Soft-PWM setting"

You can change the motor tone.

By parameter setting, you can select Soft-PWM control which changes the motor tone.

Soft-PWM control changes motor noise from a metallic tone into an unoffending complex tone.

Parameter

Number

Factory

Setting

Setting Range Remarks

72 2 0 to 15 0: 0.7kHz, 15: 14.5kHz

240 1 0, 1 1: Soft-PWM valid

•

Refer to the following list and set the parameters:

Parameter

Number

Factory Setting Description

72 0 to 15

PWM carrier frequency can be changed.

The setting displayed is in [kHz]. Note that 0 indicates 0.7kHz and 15 indicates 14.5kHz.

0 Soft-PWM invalid

240

1 When any of "0 to 5" is set in Pr. 72, Soft-PWM is made valid.

Note: 1. A reduced PWM carrier frequency will decrease inverter-generated noise and leakage current but

increase motor noise.

2. If the PWM carrier frequency is increased to make noise low, continuous operation performed at

more than 75% of the rated current may generate motor noise, but this is not an error.

1 2 ... 106 107 108 109 110 111 112 113 114 115 116 ... 216 217

No comments

Mitsubishi Electric FR-E540 Instruction Manual Page 111