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5.1.12
Slip compensation
Calculate setting value
Optimize setting value
P32 (A-0-0032)
1070 066 028-101 (01.05) GB
The slip compensation serves to compensate for the speed drop between
no-load speed and load speed (= slip). Slip compensation is maintained
within a large speed range independent of load or the direction of rotation.
Enter the rated motor slip as a % value.
It is calculated from the motor rating plate data according to the following
formula:
n
N
s
= 1 –
[%]
N
n
0
.
n
p
N
s
= 1 –
N
.
60 f
N
The calculated setting value is falsified by slight deviations of the actual
motor data from the rating plate data.
For very precise applications, the setting value can therefore be corrected as
follows after commissioning pursuant to Section 5.2:
D First set desired operating speed in no-load operation after
commissioning.
D Apply a load to the motor.
D Correct speed drop of the motor via P32:
Slip compensation
min.
all
0.0
DMs, DS
factory
setting
Commissioning
f
.
N
with n
= 60
0
p
s
= rated motor slip
N
n
= rated speed
N
n
= no-load speed
0
f
= rated motor frequency
N
p
= number of pole pairs
Range [%]
max.
smallest step
0.1
10 %
5–17
[%]
–1
[min
]
–1
[min
]
[Hz]
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