LG C Series User Manual

Page 85

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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

ƒ Set H40 – [Control mode select] to 1 {Slip compensation}.
ƒ 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

P

rpm

f

f

r

s

Where,

= Rated slip frequency

s

f

= Rated frequency

r

f

= Motor nameplate RPM

rpm

P = Number of Motor poles

85

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