Pwm Carrier Frequency (Pr. 72, Pr. 240) - Mitsubishi Electric FR-E500 Instruction Manual

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

Pr. 72 "PWM frequency selection"
Pr. 240 "Soft-PWM setting"
You can change the motor tone.
y By parameter setting, you can select Soft-PWM control which changes the motor
tone.
y Soft-PWM control changes motor noise from a metallic tone into an unoffending
complex tone.
Parameter Factory
Number Setting
72
240
<Setting>
y Refer to the following list and set the parameters:
Parameter
Setting
Number
72 0 to 15
0
240
1
Note: 1. Note that when the inverter is run at the ambient temperature above
40°C (104°F) with a 2kHz or higher value set in Pr. 72, the rated output
current of the inverter must be reduced. (Refer to page 188 (depending upon
the inverter).)
2. An increased PWM frequency will decrease motor noise but noise and
leakage current will increase. Take proper action (refer to pages 36 to 40).
Setting
Range
1 0 to 15
1 0, 1
PWM carrier frequency can be changed.
The setting displayed is in [kHz].
Note that 0 indicates 0.7kHz and 15 indicates 14.5kHz.
Soft-PWM invalid
When any of "0 to 5" is set in Pr. 72, Soft-PWM is made valid.
103
PARAMETERS
Remarks
0 : 0.7kHz,
15 : 14.5kHz
1: Soft-PWM valid
Description
4