8.3.2 Enhanced V/F Control
S0.20 Rated motor slip frequency
Setting range 0.00 ~ 20.00 Hz
Minimum unit 0.01 Hz
Factory default 0.00 Hz
Used to compensate the speed difference caused by the load in V/F control, and
to ensure that the rotator’s speed is close to the synchronous speed with rated
load and improve the mechanical behavior of the motor, as shown in the figure
below:
Fig. 8-17: Slip frequency compensation
This parameter should be set according to the data on the motor nameplate. If it
is unavailable on the nameplate, please calculate the data with the formula be-
low:
n
s
synchronous speed
P numbers of pole pairs
S rated slip
n
n
rated speed
f
s
rated slip frequency
f
n
rated frequency
Fig. 8-18: Slip frequency calculation
● If the slip frequency compensation is too large, the motor speed
may exceed the synchronous speed.
● Slip compensation will not work under circumstances of accelera-
tion, deceleration, regenerative mode and DC braking.
Bosch Rexroth AG
Parameter Settings
EFC 3600
72/259
DOK-RCON03-EFC-3600***-IT03-EN-P
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