4-64
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.
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, it 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.
Lr
LlKg
=
ξ
02-34
Motor Slip Frequency Default: KVA
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:
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.
When auto-tuning is successful, parameters of group 2 will be updated with auto-tuning result valuesrefer to group 17
for more details.
1800
4
60
120
120
=
×
=
×
=
Pole
Frequency
N
rpm
Hz
Slip
67
.
1
60
1700
1800
=
–
=