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Finite-element performance comparison of IPMSMs with unsymmetrical double-layer windings

机译：具有不对称双层绕组的IPMSM的有限元性能比较

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摘要

This paper presents a comparison of the performances between IPMSMs (Interior Permanent Magnet Synchronous Machine) with a symmetrical and with two different types of unsymmetrical windings. The aim is to demonstrate that the adoption of slightly unsymmetrical windings does not significantly affect the performances of the machines, both in terms of cogging torque and torque/load angle characteristics, providing also the advantage of a higher possibility of choice in terms of slot number/poles ratio. More in particular, an IPMSM model (named IPMSM-1) derived from a commercial geometry equipped with a symmetrical winding is analyzed by using a Finite Element Method (FEM) approach. The simulation results regarding the cogging torque trend, the static characteristics and the related harmonic analysis are shown and discussed. Afterwards, two other IPMSM models with unsymmetrical windings are obtained by modifying the IPMSM-1 stator structure, but maintaining the same rotor configuration. FEM analysis are carried out also for these geometries and the related simulation results are compared with those obtained for the IPMSM-1 model. From this comparison it can be stated that the equipment of slightly unsymmetrical windings can be a viable choice during the design process of rotating electrical machines.
机译：本文介绍了具有对称绕组和两种不同类型的非对称绕组的IPMSM（内部永磁同步电机）之间的性能比较。目的是证明采用稍微不对称的绕组在齿槽转矩和转矩/负载角特性方面均不会显着影响电机的性能，并且还具有在槽数方面选择的可能性更高的优点。 /极比。更具体地，通过使用有限元方法（FEM）方法来分析源自配备有对称绕组的商业几何形状的IPMSM模型（称为IPMSM-1）。显示并讨论了关于齿槽转矩趋势，静态特性和相关谐波分析的仿真结果。然后，通过修改IPMSM-1定子结构，但保持相同的转子配置，获得了另外两个具有不对称绕组的IPMSM模型。还对这些几何形状进行了有限元分析，并将相关的模拟结果与从IPMSM-1模型获得的结果进行了比较。从该比较可以看出，在旋转电机的设计过程中，稍微不对称的绕组的设备可能是一个可行的选择。

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