Power Electronics SD 300 Series, Руководство по началу работы

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SD300 POWER ELECTRONICS
312
COMMONLY USED CONFIGURATIONS
8. Current loop controller
Set these parameters for setting the gain values for the PI current
controller in a synchronous motor.
The P gain is the proportional gain for the current deviation. The current
deviation decreases faster with higher values, as the deviation in voltage
output command increases with increased deviation.
The I gain is the integral gain for the current deviation. Deviation in normal
operation decreases with higher values.
However, the gain values are limited by the carrier frequency. A fault trip
may occur due to interference if the gain values are set too high.
Parameter Default value Description Set value
Cn.48 1200
Current controller P gain
1200
Cn.49 120
Current controller I gain
120
9. Voltage loop limiter controller
The PMSM motors have a handicap: to gets the maximum torque at the
maximum speed, it is necessary the nominal voltage of the motor. Due to
the voltage drop in the drive, sometimes the drive is not able to supply the
maximum voltage to the motor.
By overmodulation space vector algorithm, the drive is able to increase
the output voltage using the parameters Cn.50 and Cn.51.
If it is not necessary, do not modify these parameters, if the motor supplies
the torque desired at maximum speed. Increase these parameters can
cause a higher THDi level in the motor, getting torque pulses.
Parameter Default value Description Set value
Cn.50 10.0%
Voltage controller limit
10.0%
Cn.51 10.0%
Voltage controller I gain
10.0%