A non-sinusoidal power supply is usually applied in a multiphase induction motor drive in order to improve the torque density with harmonic current injection. The harmonic parameters in the motor are essential for harmonic current proportion derivation. In the present work, detailed inductance parameters are derived, and an optimized non-sinusoidal power supply is proposed based on harmonic parameter analysis. The traditional method considers only air-gap flux density distribution optimization, while the yoke flux density is ignored. The proposed method focuses on optimizing the air-gap flux density and yoke flux density simultaneously. The proposed method improves the stator iron utilization, and the torque density and efficiency are enhanced under heavy loads. Finally, 15 kW and 630 kW nine-phase motor drives are constructed, and the proposed non-sinusoidal power supply control strategy is validated experimentally.

非正弦电源通常用于多相感应电动机驱动器中，以通过注入谐波电流来提高转矩密度。电机中的谐波参数对于谐波电流比例推导至关重要。在本工作中，推导了详细的电感参数，并基于谐波参数分析提出了一种优化的非正弦电源。传统方法仅考虑气隙磁通密度分布的优化，而忽略了磁轭磁通密度。该方法着重于同时优化气隙磁通密度和磁轭磁通密度。该方法提高了定子铁的利用率，在重载下提高了转矩密度和效率。最后，构建了15 kW和630 kW的九相电动机驱动器，