宽调速范围低转矩脉动的一种新型内置式永磁同步电机的设计与分析

Design and analysis of a novel interior permanent magnet synchronous machine with wide speed region and low torque ripple

宽调速范围与低转矩脉动一直是设计电动汽车用内置式永磁同步电机时所追求的重要目标。设计了一种转子结构为珡W的新型内置式永磁同步电机,并进行了绕组结构优化与性能分析。利用有限元分析法,将所设计的电机初始模型、优化模型以及转子结构为一字型的传统内置式永磁同步电机模型进行了对比分析。通过对电机的永磁体用量、dq轴电感、弱磁调速能力、齿槽转矩以及纹波转矩等重要参数的详细对比分析,最终选择了36槽8极转子结构为珡W的内置式永磁同步电机设计方案。此方案在保证电机转矩、功率要求的前提下,可以获得较宽的调速范围和较小的整体转矩脉动。

Wide speed region and low torque ripple is always the key destination when designing a interior permanent magnet machine for electric vehicle traction. A novel interior permanent magnet synchronous motor （IPMSM） with rotor topology of W - type, is designed then winding structure optimization and performance analysis have been presented. Using finite element analysis, the comparison and analysis of the initial design model, the optimization model and the traditional IPMSM model have been carried out. Detailed comparative analysis of the machines＇ parameters is made, which includes the total mass of the used permanent magnet, d-q axis inductance, the capacity of flux-weakening, cog- ging torque and ripple torque and so on. Finally, the design of the IPMSM with 36 - slot 8 - pole, and rotor topology of W- type is selected. The machine has both a wide speed region and low torque ripple, while the torque and power of the machine have been ensured.