Mitsubishi Electronics FR-V500 Is the torque command unvaried?, Reduce noise, Frequency low?

Troubleshooting

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Is the torque command unvaried?

Y

Has online auto tuning been performed?

Y

When the torque command is small, does the motor rotate in the direction opposite to the start signal?

N

Does the motor vibrate during acceleration/ deceleration?

N

N					N
		Is there no influence
		of noise?
				Y	Take measures to
					reduce noise.
					N
			Is the PWM carrier
			frequency low?
				Y	Decrease the carrier
					frequency (Pr. 72).
	Set the torque setting
	filter (Pr. 826).

N

Set the online auto tuning (Pr. 95). The torque accuracy improves.

(Motor heat generation-based resistance compensation is made.)

Y

Make torque command bias offset calibration (Pr. 904).

Y

Since the speed restriction value increases or decreases during acceleration/deceleration, speed restriction is activated.

Shorten the acceleration/deceleration time.

Is the output torque non-linear in response to the torque command?

N

At the torque command of 0%, do large torque ripples occur at the instant the motor stops running?

N

Please contact your sales representative.

Y

The excitation ratio (Pr. 854) is so low that torque is insufficient. Increase the excitation ratio (return it to the factory setting). Speed restriction is in progress.

Increase the speed restriction level or decrease the torque command.

Y

In an attempt to reduce the motor speed to 0r/min,

the motor performs micro-rotation in the reverse rotation direction. At that time, speed restriction operation is performed and torque control is switched to speed control.

At that time, since the factory setting of the torque restriction mode (Pr. 810) is 0 and the torque restriction command is as set in

the parameter, the torque is restricted to 150%, and when an attempt is made to reduce the speed to 0r/min, torque is generated abruptly. Hence, the torque restriction level must be decreased.

Set "1" in Pr.810 "torque restriction mode" to activate torque restriction.

ERRORS AND PROTECTIVE FUNCTIONS

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