采用拼接式转子的内置永磁同步电动机的优化设计
摘 要：针对传统内置永磁同步电动机漏磁系数较大，隔磁桥机械强度较差等特点，提出一种拼接式转子，这种转子具有若干个独立的铁心，用高强度非铁磁部件通过鸽尾形槽把这些铁心拼接起来，这种转子不需要隔磁桥，所以这种转子能够有效限制漏磁。拼接式转子的铁心具有一些磁障（空气槽），这些磁障可以影响气隙内的磁场分布从而实现近似正弦分布的气隙磁密波形。初步设计了一台基于拼接式转子的3kW电动机，采用田口法对转子磁障的关键参数进行了优化，并对拼接式转子和传统内置永磁转子进行了对比分析，结果表明所提出的拼接式转子优于传统内置永磁转子。
关键词：永磁同步电动机；拼接式转子；磁障；优化；田口法
DOI：
中图分类号：TM351 文献标志码：A 文章编号：
Abstract： Considering that the flux leakage coefficients of conventional Interior Permanent Magnet Synchronous Motors （IPMSM） are relatively high， and the mechanical strengths of the rotor bridges are relatively low， a kind of spliced type rotor was proposed， the spliced type rotor has several individual iron core parts， those iron core parts are spliced together by high strength nonmagnetic components using dovetail slots， the rotor does not require bridges， and hence the leakage flux of the rotor can be restricted effectively. There are several flux barriers （air slots） in the iron core parts of the spliced type rotor， these flux barriers can influence the magnetic field distributions in the air gap and realize a near-sinusoidal air gap flux density waveform. The initial design parameters of a 3kW motor based on the spliced type rotor were obtained from the initial design process， several key parameters of the rotor flux barriers were optimized by using the Taguchi method， and a comparative analysis of the spliced type rotor and a conventional interior permanent magnet rotor was performed， the comparative analysis results show that t...
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