6-39
6-9 Slip Compensation Function
The slip compensation function calculates the motor torque according to
the output current, and sets gain to compensate for output frequency.
This function is used to improve speed accuracy when operating with a
load. It is mainly valid for V/f gain.
n106 Rated Motor Slip Register 016A
Hex
Changes during
operation
Yes
Setting
range
0.0 to 20.0 (Hz) Unit of
setting
0.1 Hz Default setting (see
note)
Note The default setting varies with the capacity of the Inverter model.
Set Values
·Set the rated slip value of the motor in use.
·This parameter is used as a slip compensation constant.
·Calculate the rated motor slip value from the rated frequency (Hz) and rpm on the
motor nameplate by using the following formula.
Rated slit value (Hz) = Rated frequency (Hz) –
Rated rpm × Number of poles
120
n111 Slip Compensation Gain Register 016F
Hex
Changes during
operation
Yes
Setting
range
0.0 to 2.5 Unit of
setting
0.1 Default setting 0.0
(see
note 1)
Note 1. If set to vector control mode, the default value will be 1.0.
Note 2. This parameter is disabled with the value set to 0.0.
Set Values
·Settheparameterto1.0firstandchecktheoperationoftheInverter.Thenfine-tunethe
gain with 0.1-gain increments or decrements.
If the speed is lower than the target value, increase the set value.
If the speed is higher than the target value, decrease the set value.
n112 Slip Compensation Primary
Delay Time
Register 0170
Hex
Changes during
operation
No
Setting
range
0.0 to 25.5 (s) Unit of
setting
0.1 s Default setting 2.0
(see
note)
Advanced Operation Chapter 6
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