Auxiliary Function Parameters; Slip Compensation; Automatic Torque Boost Selection - Mitsubishi FR - S500 Instruction Manual

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.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
95 Rated motor slip
Slip compensation time
96
constant
Constant-output region slip
97
compensation selection
<Setting>
Synchronous speed at base frequency - rated speed
Rated slip =
Parameter Setting
0.01 to 50%
95
96 0.01 to 10s
97
* 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

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
Automatic torque boost
98
selection (motor capacity)
Factory
Name
Setting
Synchronous speed at base frequency
Used to set the rated motor slip.
0, - - - Slip compensation is not made.
Used to set the slip compensation response time. (*)
Slip compensation is not made in the constant output
0
range (frequency range above the frequency set in Pr. 3).
- - - Slip compensation is made in the constant output range.
Name
Setting
Range
0 to 50%,
- - -
- - -
Setting is enabled when
0.5s 0.01 to 10s
Pr. 30 = "1"
- - - 0, - - -
Function
Factory Setting
Setting Range
0.1 to 3.7kW,
- - -
- - -
109
Remarks
×100[%]
Remarks
Setting is enabled when
Pr. 30 = "1"
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