A Novel Dual Three-Phase Permanent Magnet Synchronous Motor With Asymmetric Stator Winding


Demir Y., Aydin M.

IEEE TRANSACTIONS ON MAGNETICS, cilt.52, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 52 Konu: 7
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1109/tmag.2016.2524027
  • Dergi Adı: IEEE TRANSACTIONS ON MAGNETICS

Özet

Although three-phase permanent magnet (PM) motors are dominant in industry, multi-phase PM synchronous motors present higher torque-to-weight ratios, better efficiency, and low torque ripple compared with three-phase conventional PM motors. These features make fault-tolerant multi-phase PM motors become attractive for safety-critical applications. In this paper, a novel PM multi-phase motor design with a dual three-phase asymmetric stator winding is proposed. The winding structure of the proposed motor is unconventional due to selected slot-pole combinations. Therefore, an asymmetric winding is needed. The detailed finite-element analysis of the proposed motor and a performance comparison between the conventional integer-slot (72-slot/12-pole motor) with symmetric winding and the unconventional fractional-slot (78-slot/12-pole motor) PM motors with asymmetric windings is performed to see the benefits of the proposed motor. It was shown that the novel unconventional multi-phase PM motor has excellent torque quality and slightly higher torque density levels.