CPC H02P 21/22 (2016.02) [H02P 21/13 (2013.01)] | 10 Claims |
1. A decoupling control system for a harmonic current of a salient pole synchronous motor, comprising:
a harmonic current detection module (1), configured to detect and acquire 6k±1 harmonic currents and take the same as harmonic current feedback, wherein k is a positive integer;
a linear transformation module (2), configured to perform linear transformation on 6k±1 harmonic current references and the detected 6k±1 harmonic current feedback to acquire new harmonic currents in a harmonic reference frame separately;
a harmonic current decoupling control module (3), configured to adjust an output voltage according to an error between a harmonic current reference subjected to the linear transformation and harmonic current feedback subjected to the linear transformation, and perform independent decoupling control over each of the harmonic currents;
an inversely linear transformation module (4), configured to perform inversely linear transformation on the output voltage of the harmonic current decoupling control module (3) to acquire a control output voltage in the harmonic reference frame; and
a motor control module (6), configured to take the control output voltage as a part of output voltage reference of the inverter for controlling operation of the salient pole synchronous motor.
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