5.12.9 Slip compensation
The slip of the motor is estimated from the inverter output current to maintain the rotation of the motor constant.
Slip compensation time
Constant-output range slip
• Calculate the rated motor slip and set the value in
Slip compensation is not performed when
Synchronized speed at the time of base frequency - rated rotation speed
Rated slip ＝
• When the slip compensation is performed, the output frequency may become larger than the set frequency. Set Pr.1 Maximum
frequency higher than the set frequency.
• Slip compensation will be disabled in the following conditions:
Stall prevention (OLC, OLV) operation, regeneration avoidance operation, auto tuning
Parameters referred to
Pr.1 Maximum frequency
Pr.3 Base frequency
5.12 (G) Control parameters
Synchronized speed at the time of base frequency
0.01 to 50%
Set the rated motor slip.
No slip compensation
Set the response time of the slip compensation. Reducing the
0.01 to 10 s
value improves the response, but the regenerative overvoltage
(E.OV) error is more likely to occur with a larger load inertia.
No slip compensation in the constant output range (frequency
range higher than the frequency set in Pr.3).
Slip compensation is performed in the constant power range.
to enable slip compensation.
= "0 or 9999".
× 100 [%]