TECO-Westinghouse F510 Series, Instruction Manual, Page: 160 / 444

4-88
In V / F control mode, the output current is greater than the no-load current with slip compensation is
enabled.
Note: The value of 02-01 needs to be greater than the value set in parameter 02-00, otherwise warning
message "SE01" out of range error will be displayed.
Figure 4.3.12 Y-equivalent model of an induction motor
(13) Motor Leakage Inductance Ratio (02-33)

This parameter is set by the conversion of manual adjustment function. This adjustment does not
have the magnetic function. Normally, it does not require adjustment.

Definition of leakage inductance ratio is the ratio of leakage inductance to rotor inductance. If
default setting is 3.4%, adjust this ratio changes the parameter of motor leakage inductance. The
formula of this ratio is as follows:
Lr
LlKg



When the ratio of leakage inductance is too high or too low, it may cause the motor jittering with
different sound and without operation. The general setting range is 3.0%~5.0% and 4.0% is the
relatively common value for motor operation normally. The ratio of leakage inductance is adjusted
depending on different motor types.
(14) Motor Slip Frequency (02-34)

This parameter is set by the conversion of manual adjustment function. This adjustment does not
have the magnetic function. Normally, it does not require adjustment.

The default setting is 1Hz and the value of motor slip frequency is obtained from motor nameplate.
Take 4-pole motor with 60Hz for example,
Synchronous speed is
1800
4
60 120 120





Pole
Frequence
N
rpm and the rated speed in the
motor nameplate is 1700 rpm, then
Hz Slip 67 . 1
60
1700 1800



.
Note: Adjusting the motor slip frequency changes the parameter of rotor resistance and the value of slip
frequency is adjusted depending on different motor types.
Note: After executing auto-tuning, parameters which marked <1> will renew the value. Please refer Group
17: Automatic Tuning Parameters for more detail.