Harmonic Current Suppression of Dual Three-Phase Permanent Magnet Synchronous Machine Based on Hybrid Control Strategy

This paper investigates the harmonic current of the dual three-phase permanent magnet synchronous machine (PMSM), and establishes the machine model considering winding structure with neutral segregation. Based on this model, adopting 6 theta and 18 theta quadratic rotary coordinate transformation respectively in the harmonic plane, then 5th, 7th, 17th and 19th harmonic currents were transformed into fundamental wave component to be suppressed, reduced the number of the controllers. Combining the advantages of PIR controller which can adaptively track the characteristics of the cycle parameters, proposed a hybrid control strategy to suppress the harmonic current. Compared with the traditional control method, this control strategy not only reduces the control complexity, but also has good current harmonic suppression effect. Finally, the simulation verifies the effectiveness of the proposed strategy to suppress harmonic current.