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首页> 外文期刊>Applied Computational Electromagnetics Society journal >Magnet Modification to Reduce Pulsating Torque for Axial Flux Permanent Magnet Synchronous Machines
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Magnet Modification to Reduce Pulsating Torque for Axial Flux Permanent Magnet Synchronous Machines

机译：减少轴向磁通永磁同步电机脉动转矩的磁体改进

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摘要

To reduce pulsating torque without sacrificing the average torque significantly in axial flux permanent magnet synchronous machines (AFPMSM), this paper presents two optimization techniques which are based on magnet modification: i) combine magnet circumferential displacement with various pole-arc ratios (method one); ii) magnet axial shape design (method two). Firstly, analytical models of air gap magnetic field were derived for the above two methods. Then, according to Maxwell stress tensor method, the analytical expressions of cogging torque and electromagnetic torque were obtained. Average torque, cogging torque and electromagnetic torque ripple were considered simultaneously in the optimization using multi-objective genetic algorithm (MOGA) with the help of the analytical torque models. Finally, 3D finite element models were established to verify the two torque optimization methods. The proposed methods were also compared with skew technique, which is widely used nowadays. Result showed that the proposed optimization techniques can greatly reduce the overall pulsating torque without decreasing the average torque and did not increase the use of permanent magnet.
机译：为了在不显着牺牲轴向磁通量永磁同步电机（AFPMSM）的情况下降低脉动转矩的情况下，本文提出了两种基于磁体改进的优化技术：i）将具有不同极弧比的磁体周向位移相结合（方法一） ; ii）磁铁轴向形状设计（方法二）。首先，针对以上两种方法推导了气隙磁场的解析模型。然后，根据麦克斯韦应力张量法，得到齿槽转矩和电磁转矩的解析表达式。在多目标遗传算法（MOGA）的帮助下，在分析扭矩模型的帮助下，同时考虑了平均扭矩，齿槽扭矩和电磁扭矩波动。最后，建立3D有限元模型以验证两种扭矩优化方法。还将所提出的方法与时下使用的偏斜技术进行了比较。结果表明，所提出的优化技术可以在不降低平均转矩的情况下大大降低整体脉动转矩，并且不会增加永磁体的使用。

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