Current control method with enhanced PI controller for six-phase PM synchronous motor drive

To suppress the undesired 5th and 7th stator harmonic current in the six-phase permanent magnet synchronous motor (PMSM), an improved vector control algorithm with enhanced PI controller was proposed based on vector space decomposition (VSD) transformation method, which can control the fundamental and harmonic sub-space separately. To obtain better control performance, an enhanced PI controller is proposed in this paper, which can achieve the zero steady-state error control of both dc and ac components. Moreover, the proposed method has taken into account the current unbalances in both x-y plane suppress the specific 5th and 7th harmonic component compensation, which avoid the need of additional complex control algorithms such as the synchronous reference frame transformation. Compared with the simulation results of existing methods, which verify the effectiveness of the proposed current vector de controller.