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Chapter 10. Advanced functions
10.6 Slip compensation
Group LED Display Parameter Name
Set
value
Min/Max
Range
Factory
Defaults
Unit
H30
[Motor type select]
- 0.2/2.2 -
H31
[Number of motor poles]
- 2/12 4
H32
[Rated slip frequency]
- 0/10 - Hz
H33
[Motor rated current]
- 1.0/12 - A
H34
[Motor No Load Current]
- 0.1/12 - A
H36
[Motor efficiency]
- 50/100 - %
H37
[Load inertia rate]
- 0/2 0
Function
group 2
H40 [Control mode select] 1
0/3 0
Set H40 – [Control mode select] to 1 {Slip compensation}.
This function enables the motor to run in constant speed by compensating inherent slip in an
induction motor. If motor shaft speed decreases significantly under heavy loads then this value
should be increased.
H30: Set the motor type connected to the inverter.
0.2 0.2kW
0.4 0.4kW
0.75 0.75kW
1.5 1.5kW
H30 [Motor type
select]
2.2 2.2kW
H31: Enter the pole number on the Motor nameplate.
H32: Enter the slip frequency based on the following formula and motor nameplate.
⎟
⎠
⎞
⎜
⎝
⎛
×
−=
120
Prpm
ff
rs
Where,
= Rated slip frequency
s
f
= Rated frequency
r
f
= Motor nameplate RPM
rpm
P
= Number of Motor poles
85