Power Electronics SD300 Series User Manual

SD300
POWER ELECTRONICS
308
COMMONLY USED CONFIGURATIONS
Parameter
Default value
Description
Set value
bA.20
0
Auto tuning
7 All PM
bA.32
100%
Q-axis inductance scale
100%
bA.34
33.3%
Auto tuning level for Ld and Lq
33.3%
bA.35
100.0%
Auto tuning frequency for Ld and Lq
100.0%
3. Speed loop controller Sensorless
For a PI speed controller, P gain is a proportional gain for the speed
deviation. If the speed deviation becomes greater than the torque, the
output command will increase accordingly. With a high value in P, the
speed is regulated in faster way. Too high values can produce instability
in the speed.
The speed controller I gain is the integral gain for speed deviation. It is the
time taken for the gain to reach the rated torque output command while
constant speed deviation continues. The lower the value becomes, the
faster the speed deviation will decrease.
As the motor inertia varies by motor, the gain values should be changed
according to the motor speeds. Cn.12 and Cn. 13 set the low speed P/I
controller gain values, while Cn.15 and Cn.16 set the high speed P/I
controller gain values, so that an appropriate gain value can be used for
different motor speeds.
If the values of the speed regulator are too low, the speed could get
overshoots when it tries to find the speed. If the values of this regulator is
too high, the motor could get instabilities trying to find the speed.
Parameter
Default value
Description
Set value
Cn.12
100
PM speed controller P gain 1
100
Cn.13
150
PM speed controller I gain 1
150
Cn.15
100
PM speed controller P gain 2
100
Cn.16
150
PM speed controller I gain 2
150

Power Electronics SD300 Series Specifications

General

Brand	Power Electronics
Model	SD300 Series
Category	Inverter
Language	English