Mitsubishi FR - S500 instruction manual Auxiliary Function Parameters, Slip compensation, 11.2

2.11 Auxiliary Function Parameters

2.11.1 Slip compensation

The inverter output current may be used to assume motor slip to keep the motor speed constant.

Parameter	Name	Factory	Setting	Remarks
		Setting	Range
95	Rated motor slip	- - -	0 to 50%,
			- - -
96	Slip compensation time	0.5s	0.01 to 10s	Setting is enabled when
	constant			Pr. 30 = "1"
97	Constant-output region slip	- - -	0, - - -
	compensation selection

<Setting>

Rated slip =	Synchronous speed at base frequency - rated speed		×100[%]
	Synchronous speed at base frequency
Parameter	Setting	Function
95	0.01 to 50%	Used to set the rated motor slip.
	0, - - -	Slip compensation is not made.
96	0.01 to 10s	Used to set the slip compensation response time. (*)
	0	Slip compensation is not made in the constant output
97		range (frequency range above the frequency set in Pr. 3).
	- - -	Slip compensation is made in the constant output range.

*When this value is made smaller, response will be faster.

However, as load inertia is greater, a regenerative overvoltage (OVT) error is more liable to occur.

REMARKS

When making slip compensation at 60Hz<50Hz>, set the maximum frequency to slightly higher than 60Hz<50Hz>.

In the factory setting status, it is clamped at 60Hz<50Hz>.

2.11.2 Automatic torque boost selection 2

You can choose automatic torque boost control.

Automatic torque boost control

Not only gives the motor the optimum excitation but also provides high torque even in a low speed range.

Parameter	Name	Factory	Setting	Remarks
		Setting	Range
98	Automatic torque boost	- - -	0.1 to 3.7kW,	Setting is enabled when
	selection (motor capacity)		- - -	Pr. 30 = "1"

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