Vector control and harmonic ripple reduction with Independent Multi-phase PMSM

Multi-phase Permanent Magnet Synchronous Motors (M-PMSM) have the many advantages over conventional 3-phases PM ones. Their feasibilities and performances are described and proven in many literatures. M-PMSM is useful for large systems such as electrical ship propulsion, locomotive traction or electrical vehicles applications. Characteristics of Independent Multi-phase Permanent Magnet Synchronous Motor (IM-PMSM) are similar to M-PMSM, but the control concept is considerably different. IM-PMSM has basic problems that multiple three harmonics are generated at each phase due to the structure of the separated windings. The main goal of this paper is developing the drive system of IM-PMSM proving the cause of harmonics and proposing a new method to eliminate harmonics.