永磁同步电动机齿槽转矩优化设计仿真

Optimization Design and Simulation of Cogging Torque of Permanent Magnet Synchronous Motor

分数槽集中绕组永磁同步电动机因产生齿槽转矩及大量的磁动势谐波,会影响电机的工作性能。在分析齿槽转矩及谐波产生原理的基础上,确定了齿槽转矩及磁动势谐波影响因素,对电机结构进行了综合优化设计。针对一款400 W永磁同步电动机,通过对绕组系数、齿槽转矩、力波振动和谐波损耗综合分析,设计了12槽10极双层并联绕组和不开槽定子结构;采用环形永磁体以优化气隙磁密;以体积、成本、性能为综合指标,设计了电机各部分尺寸。通过有限元分析法对电机静磁场特性、空载气隙磁密、齿槽转矩及空载反电动势进行了仿真分析。制造样机并进行了性能测试。仿真与测试结果表明,该电机设计合理,性能优良。

Fractional-slot concentrated-winding permanent magnet synchronous motors may affect the performance of the motor due to cogging torque and a large number of harmonics of the magnetomotive force. Based on the analysis of the principle of cogging torque and harmonic generation, the cogging torque and the influence factors of harmonics of the mag-neto-motive force were determined, the motor structure was optimized and designed. For a 400 W permanent magnet syn-chronous motor, a 12-slot 10 pole double-layer shunt winding and a non-slotted stator structure were designed by analy-zing the winding coefficient, cogging torque, force wave vibration and harmonic loss. In order to optimize the air gap mag-netic density; volume, cost, performance as a comprehensive indicator, the design of the motor part size. The finite ele-ment analysis method was used to simulate the static magnetic field characteristics, no-load air gap flux density, cogging torque and no-load back electromotive force. Prototypes were built and tested for performance. Simulation and test results show that the motor has a reasonable design and good performance.