Pwm Carrier Frequency (Pr. 72, Pr. 240) - Mitsubishi FR-F500 Instruction Manual

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 Factory
Number Setting
72
240
<Setting>
Refer to the following list and set the parameters:
Parameter
Factory Setting
Number
72
240
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.
Setting Range
2 0 to 15
1 0, 1
PWM carrier frequency can be changed.
0 to 15
The setting displayed is in [kHz]. Note that 0 indicates 0.7kHz and 15 indicates 14.5kHz.
0 Soft-PWM invalid
1 When any of "0 to 5" is set in Pr. 72, Soft-PWM is made valid.
Remarks
0: 0.7kHz, 15: 14.5kHz
1: Soft-PWM valid
Description
98
PARAMETERS