4-102
02-33: Proportion of Motor Leakage Inductance
1. In most applications motor leakage current does not need to be adjusted. The value is not set by the
auto-tuning function.
Lr
LlKg
2. Leakage inductance proportion is the ratio between leakage inductance and rotor inductance. The default
value is set to 3.4%.
3.
If the motor leakage inductance proportion value is set too small or too large will cause motor jittering,
increased motor noise and unable to run the motor. In general the value needs to be between 3.0%~5.0%.
4.0% is the universal adjustment value to allow the motor to run normally. Leakage inductance proportion
setting depends on the motor rating.
02-34
Motor Slip
<1>
Range
【
0.1~20.0
】
Hz
Normally, it is not required for this parameter to be adjusted but can be set manually.
The default value of motor slip is set to 1 Hz. Motor slip is obtained from the nameplate.
Take 60Hz, 4-pole motor for example, synchronous speed:
1800
4
60
120
120
Pole
Frequency
N
rpm
Rated speed in the nameplate is 1700 rpm, then
Hz
Slip
67
.
1
60
1700
1800
Adjusting motor slip will change the rotor resistance parameter. The motor slip is adjusted depending on the
motor performance.
When auto-tuning is successful, parameters of group 2 will be updated by auto-tuning result values of group 17,
please refer to group 17 for more details.