4-217
Slip compensation limit (18-02)
(1) Sets slip compensation limit in constant torque and the constant power operation
(Figure 4.3.100)
(2) When 18-02 is 0%, the slip compensation limit is disabled.
Slip Compensation Limit
18-02
18-02
F
base
F
max
(01-12) (01-02)
01-02
01-12
×
( )
Figure 4.3.100 Slip compensation limit
When the slip compensation gain 18-00 at low speed is adjusted, and the actual motor speed is still
lower than the reference frequency, the motor may be limited by the slip compensation limit.
Slip compensation filter (18-03)
Set slip compensation filter time in V/F mode
Regenerating slip compensation selection (18- 04)
(1) Slip compensation selection enable or disable during regeneration period.
(2) To enable slip compensation during regeneration caused by deceleration (SLV mode), set
18-04 to 1 in case speed accuracy is required.
(3) When the slip compensation function is used regenerative energy might increase temporarily
(18-04= 1) therefore a braking module might be required.
SLV mode adjustment
Slip compensation gain
(1) Slip compensation can be used to control the full rang speed accuracy under load condition.
(2) If the speed is lower than 2 Hz and the motor speed decreases, increase the value of 18-00.
(3) If the speed is lower than 2 Hz and the motor speed increases, reduce the value of 18-00.
Slip compensation gain uses a single value for the whole speed range. As a result the slip
compensation accuracy at low speed is high but slight inaccuracies might occur at high speeds.
For the speed control accuracy of full range, 18-00 is a fixed value. If inverter adjust speed accuracy
at lower speed, speed accuracy will also be happened at higher speed. If the speed accuracy at
higher speed is not acceptable, please adjust 18-00 or 18-01, but adjusting these parameters might
impact the accuracy at lower speeds.
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