gefran VDI100 Series Instruction Manual page 141

The default value of motor slip is set to 1.78 Hz. Motor slip is obtained from the nameplate.
Take 60Hz, 4-pole motor for example, synchronous speed:
Rated speed in the nameplate is 1700 rpm, then
Adjusting motor slip will change the rotor resistance parameter. The motor slip is adjusted depending on the
motor performance.
Code Parameter Name / Range
02-37 Motor Mechanical Loss
0.0~10.0 %
Adjustment range of mechanical loss is 0.0~10.0%. It is enabled only in the speed mode and the speed com-
mand being 0.
If the speed command is 0 and the shaft will be at slow drift causing to be static incompletely, adjust upwards
the range of mechanical loss until the shaft is completely static.
Note:
After executing auto-tuning, parameters which marked <1> will renew the value. Please refer Group 17: Automatic
Tuning Parameters for more detail.
VDI100 • Instruction manual
×
120 Frequence
=
N
Pole
−
1800 1700
= =
Slip . 1 67 Hz
60
×
120 60
= =
1800 rpm
4
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