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A new hybrid method for the fast computation of airgap flux and magnetic forces in IPMSM

机译：快速计算永磁同步电机气隙磁通和磁力的新混合方法

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In this paper, a new hybrid method is developed for the fast and accurate computation of air gap flux density in the open-circuit Interior Permanent Magnet Synchronous Machines (IPMSM). The rotor magnetomotive force is estimated using a single non-linear FEA simulation. Then, rotor motion and stator slotting effect are included without loss of calculation performance using the semi-analytical subdomain method initially developed for Surface Permanent Magnet Machines. This hybrid method calculates the time and spatial distribution of radial and tangential airgap flux in a few seconds. It can be used to quickly estimate electromagnetic quantities (cogging torque, back emf) as well as magnetic forces for the electromagnetic and vibroacoustic design optimization of electric motors. The method is applied to the vibroacoustic analysis of the IPM machine of the Toyota Prius 2004 at open-circuit state and variable speed. Results show that the maximum sound power level occurs when the air gap magnetic pressure harmonics excite the breathing mode of the stator structure.
机译：本文提出了一种新的混合方法，用于快速准确地计算开路内部永磁同步电机（IPMSM）中的气隙磁通密度。使用单个非线性FEA仿真估算转子磁势。然后，使用最初为表面永磁电机开发的半解析子域方法，可以在不损失计算性能的情况下包括转子运动和定子开槽效应。这种混合方法可以在几秒钟内计算出径向和切向气隙通量的时间和空间分布。它可用于快速估算电磁量（齿槽转矩，反电动势）以及磁力，以优化电动机的电磁和振动声学设计。该方法适用于丰田普锐斯2004的IPM机器在开路状态和变速下的振动声学分析。结果表明，当气隙电磁压力谐波激发定子结构的呼吸模式时，会出现最大声功率级。

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