A Robust Non-Permanent Magnet Five-Phase Synchronous Reluctance Traction Motor

While interior permanent magnet machines are an attractive option for traction applications, rare-earth magnets face several challenges. On the other hand, synchronous reluctance motor is able to offer a non-permanent magnet alternative. This paper proposes the a robust non-permanent magnet five-phase synchronous reluctance motor. The torque capability of this type of motor can be improved by utilizing harmonic current injection. The machine topology, system configuration, rotor structure selection are illustrated and discussed. The electromagnetic performance and effect of the harmonic current component are verified by finite element analysis, which shows that the torque capability of the proposed five-phase synchronous reluctance motor can be significantly improved. Additionally, the proposed reluctance motor exhibits a robust structure and is suitable for high-speed and high-temperature operation.