TECO A510s - Gear Ratio of PG and Motor; Special Encoder Selection; Compensation Gain of Derating; Compensation Time of Derating

4-294
Examples:
20-29=001 → n=0, k=1, proportion = (1+0)/1=1
20-29=032 → n=0, k=32, proportion = (1+0)/32=1/32
20-29=132 → n=1, k=32, proportion = (1+1)/32=1/16
(7) Gear ratio of PG and motor (20-30, 20-31).
Gear ratio specifies when a gearbox is connected between the PG and the motor
a) Set the gear ratio of the load side parameter 20-31.
b) Set the gear ratio of the motor side parameter 20-30.
Motor speed is calculated as follows:
Note: The response speed in V / F + PG mode is less than that of SV mode.
20-32
Special encoder selection
Range
0: None
1: Resolver
Select encoder type. Power to the inverter needs to be cycled for changes to take effect.
20-34
Compensation Gain of Derating
Range
0~25600
This gain effect is the same as ASR proportional gain (20-00, 20-02). And if this parameter is coupled with
low-pass filter time constant (20-35), it can avoid oscillation.
It is suggested that the setting value of parameter 20-34 is 30~50.
20-35
Compensation Time of Derating
Range
0~30000 mSec
This time constant is used for suppressing the oscillation produced by 20-34. But too large compensation time
constant will cause slower output response and then is unfavorable for turned compensation.
It is suggested that the setting value of parameter 20-35 is 50~100ms..
Refer to Fig.4.4.108 and Fig. 4.4.109. Torque compensation function of derating can reduce the characteristics of
ASR turning around under shock load.