Mitsubishi Electronics FR-S500 PWM carrier frequency Pr. 70 , Pr, Setting, Refer to page

Operation selection function parameters

2.10.2 PWM carrier frequency (Pr. 70 , Pr. 72 )

You can change the motor sound.

Parameter	Name	Factory	Setting	Remarks
		Setting	Range
70	Soft-PWM setting	1	0, 1	Setting is enabled when
72	PWM frequency selection	1	0 to 15	Pr. 30 = "1"

<Setting>

•By parameter setting, you can set whether to exercise Soft-PWM control that changes the motor tone.

•Soft-PWM control is a control system that changes the motor noise from a metallic tone into an unoffending complex tone.

Pr.70 Setting Description

0Soft-PWM invalid

1When Pr. 72="0 to 5", Soft-PWM is made valid.

Pr.72 Setting	Description
	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.

REMARKS

•An increased PWM frequency will decrease the motor sound but increase noise and leakage currents. Therefore, perform the reduction techniques. (Refer to page 18.)

•Metallic sound may be generated from the motor at sudden deceleration but it is not a fault.

Refer to (page 69).

2

FUNCTIONS

103