Chapter 12 Description of Parameter SettingsMS300 (High Speed Model)
12-07-11
Slip Compensation Gain
Slip Compensation Gain (Motor 2)
Slip Compensation Gain (Motor 3)
Slip Compensation Gain (Motor 4)
Factory Setting: 0.00
Settings 0.00~10.00
The induction motor needs the constant slip to produce magnetic torque. It can be ignore in the
higher motor speed, such as rated speed or 2-3 % of slip.
In operation, the slip and the synchronous frequency will be in reverse proportion to produce the
same magnetic torque. That is the slip will be larger with the reduction of synchronous frequency.
The motor may stop when the synchronous frequency decreases to a specific value. Therefore,
the slip seriously affects the accuracy of motor speed at low speed.
In another situation, when the drive is used with induction motor, the slip will increase when the
load increases. It also affects the accuracy of motor speed.
This parameter can be used to set compensation frequency, and reduce the slip to make the
synchronous speed when the motor runs in rated current, thereby to improve the accuracy of
the drive. When the drive output current is higher than Pr. 05-05 No-load Current of Induction
Motor 1 (A), the drive will compensate the frequency by this parameter.
This parameter will be set to 1.00 automatically when the control method (Pr. 00-11) is changed
from V/F mode to vector mode. Please do the compensation of slip after loaded and
acceleration. The compensation value should be increased from small to big gradually. That is
to add the output frequency with motor rated slip
Pr. 07-27 Slip Compensation Gain when the
motor is at rated load. If the actual speed ratio is slower than expected, then increase the setting
value. Otherwise, decrease the setting value.
Motor Shock Compensation Factor
Factory Setting: 1000
Settings 0~10000
If there are current wave motion of motor in some specific area, setting this parameter can
improve this situation effectively. (When running with high frequency or PG, it can be set to 0.
when the current wave motion occurs in low frequency and high-powered, please increase the
value of Pr. 07-32.)
Return Time of Fault Restart
Factory Setting: 60.0
Settings 0.0~6000.0 sec.
When a reset / restart after fault occurs, the drive will regards Pr.07-33 as a time period and start
counting the number of faults occurred within this time period. Within the period, if the number of
faults occurred did not exceed the setting in Pr. 07-11, the counting will be cleared and starts
from 0 when next fault occurs.
dEb Gain
Factory Setting: 4000
Settings 0~65535
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