Cogging torque and electromagnetic vibration are two important factors for evaluating permanent magnet synchronous machine(PMSM)and are key issues that must be considered and resolved in the design and manufacture of ...Cogging torque and electromagnetic vibration are two important factors for evaluating permanent magnet synchronous machine(PMSM)and are key issues that must be considered and resolved in the design and manufacture of high-performance PMSM for electric vehicles.A fast and accurate magnetic field calculation model for interior permanent magnet synchronous machine(IPMSM)is proposed in this article.Based on the traditional magnetic potential permeance method,the stator cogging effect and complex boundary conditions of the IPMSM can be fully considered in this model,so as to realize the rapid calculation of equivalent magnetomotive force(MMF),air gap permeance,and other key electromagnetic properties.In this article,a 6-pole 36-slot IPMSM is taken as an example to establish its equivalent solution model,thereby the cogging torque is accurately calculated.And the validity of this model is verified by a variety of different magnetic pole structures,pole slot combinations machines,and prototype experiments.In addition,the improvement measure of the machine with different combination of pole arc coefficient is also studied based on this model.Cogging torque and electromagnetic vibration can be effectively weakened.Combined with the finite element model and multi-physics coupling model,the electromagnetic characteristics and vibration performance of this machine are comprehensively compared and analyzed.The analysis results have well verified its effectiveness.It can be extended to other structures or types of PMSM and has very important practical value and research significance.展开更多
电气双余度是一种常见的无刷直流电动机(Brushless DC motor,BLDCM)的余度形式。极弧系数直接决定着电气双余度BLDCM的电动势(Electromotive force,EMF)的平顶宽度,而EMF波形对电气双余度BLDCM的电磁转矩波动有着直接的影响;并且极弧系...电气双余度是一种常见的无刷直流电动机(Brushless DC motor,BLDCM)的余度形式。极弧系数直接决定着电气双余度BLDCM的电动势(Electromotive force,EMF)的平顶宽度,而EMF波形对电气双余度BLDCM的电磁转矩波动有着直接的影响;并且极弧系数对电气双余度BLDCM的定位转矩也有着显著的影响。本文针对电气双余度BLDCM,研究了极弧系数对其转矩波动的影响。首先分析了由非理想EMF波形引起的电气双余度BLDCM电磁转矩波动;然后,采用电磁场有限元分析,计算和分析了极弧系数对电气双余度BLDCM的EMF波形和定位转矩的影响;进而得到了有助于减小各种转矩波动的极弧系数取值范围。最后通过示例的计算分析给出了电气双余度BLDCM极弧系数选取的参考方法。展开更多
基金supported in part by the National Natural Science Foundation of China under Grant 51737008.
文摘Cogging torque and electromagnetic vibration are two important factors for evaluating permanent magnet synchronous machine(PMSM)and are key issues that must be considered and resolved in the design and manufacture of high-performance PMSM for electric vehicles.A fast and accurate magnetic field calculation model for interior permanent magnet synchronous machine(IPMSM)is proposed in this article.Based on the traditional magnetic potential permeance method,the stator cogging effect and complex boundary conditions of the IPMSM can be fully considered in this model,so as to realize the rapid calculation of equivalent magnetomotive force(MMF),air gap permeance,and other key electromagnetic properties.In this article,a 6-pole 36-slot IPMSM is taken as an example to establish its equivalent solution model,thereby the cogging torque is accurately calculated.And the validity of this model is verified by a variety of different magnetic pole structures,pole slot combinations machines,and prototype experiments.In addition,the improvement measure of the machine with different combination of pole arc coefficient is also studied based on this model.Cogging torque and electromagnetic vibration can be effectively weakened.Combined with the finite element model and multi-physics coupling model,the electromagnetic characteristics and vibration performance of this machine are comprehensively compared and analyzed.The analysis results have well verified its effectiveness.It can be extended to other structures or types of PMSM and has very important practical value and research significance.
文摘电气双余度是一种常见的无刷直流电动机(Brushless DC motor,BLDCM)的余度形式。极弧系数直接决定着电气双余度BLDCM的电动势(Electromotive force,EMF)的平顶宽度,而EMF波形对电气双余度BLDCM的电磁转矩波动有着直接的影响;并且极弧系数对电气双余度BLDCM的定位转矩也有着显著的影响。本文针对电气双余度BLDCM,研究了极弧系数对其转矩波动的影响。首先分析了由非理想EMF波形引起的电气双余度BLDCM电磁转矩波动;然后,采用电磁场有限元分析,计算和分析了极弧系数对电气双余度BLDCM的EMF波形和定位转矩的影响;进而得到了有助于减小各种转矩波动的极弧系数取值范围。最后通过示例的计算分析给出了电气双余度BLDCM极弧系数选取的参考方法。
