LG Electronics C Series manual Slip compensation, H40 Control mode select

Chapter 10. Advanced functions

10.6 Slip compensation

	Group	LED Display	Parameter Name		Set		Min/Max		Factory		Unit
					value		Range		Defaults
Function		H30	[Motor type select]	-		0.2/2.2		-
group 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
		H40	[Control mode select]		1	0/3		0

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

ƒThis 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.

H30	[Motor type	0.2	0.2kW
	select]
		0.4	0.4kW
		0.75	0.75kW
		1.5	1.5kW
		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.

s = r − ⎛ rpm ⋅ P ⎞ f f ⎝⎜ 120 ⎠⎟

Where, f s = Rated slip frequency

fr = Rated frequency

rpm = Motor nameplate RPM P = Number of Motor poles

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