Lenze 8210 series - Manual (Page 45)

Commissioning
UONu_^MPMQ 5-9
L
4.Set slip compensation
(C021)
Rough setting by means of the motor data: 4.Set slip compensation
(C021):
л =
е
клуе − е к
е клуе
⋅ NMMB
е
клуе =
С
Зк
⋅ SM
é
s Slip constant (C021)
n
rsyn
synchronous motor speed [min -1 ]
n r rated speed to motor nameplate [min -1 ]
f
dr
rated frequency to motor nameplate [Hz]
p Number of pole pairs
Precise setting:
Change C021 under constant load until the speed is near the synchronous speed.
If C021 is set to too high values, the drive may become instable (overcompensation).
Important D The change from V/f-characteristic control to motor-current control should only be
carried out when the controller is inhibited.
D The idle current of the motor (magnetizing current) must not exceed the rated
current of the controller.
D With very small friction values it is possible that an angle offset of up to 180 °
occurs when enabling the controller.
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