Mitsumi electronic FR-F520-0.75K, 55K instruction manual PWM carrier frequency Pr , Pr

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	Factory	Setting Range	Remarks
Number	Setting
72	2	0 to 15	0: 0.7kHz, 15: 14.5kHz
240	1	0, 1	1: Soft-PWM valid

<Setting>

•Refer to the following list and set the parameters:

Parameter	Factory Setting	Description
Number
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.
240	0	Soft-PWM invalid
	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.

98