In this article, a novel high power density permanent-magnet synchronous machine (HPDPMSM) is proposed. The flux-weakening ability and efficiency at high speed are improved by the proposed bypass-ribs added in the flux barriers. The working principle of the bypass-rib is analyzed, and the effects of the main parameters of the bypass-rib on the characteristics are investigated. The performances of the proposed HPDPMSM are analyzed and compared with that of the HPDPMSM without bypass-rib on 2-D finite-element analysis (FEA), including the cogging torque, output torque, constant-power speed range, losses, and efficiency. The results show that both HPDPMSMs generate comparable output torque and have the same maximum output power, while the proposed HPDPMSM has lower torque ripple, wider constant-power operation range, and higher efficiency in the flux-weakening operation region.

中文翻译：

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一种新型大功率密度宽调速永磁同步电机

在本文中，提出了一种新型高功率密度永磁同步电机 (HPDPMSM)。通过在磁通屏障中增加的旁路肋，提高了高速下的弱磁能力和效率。分析了旁路肋的工作原理，研究了旁路肋主要参数对特性的影响。对所提出的 HPDPMSM 的性能进行了分析，并与没有旁通肋的 HPDPMSM 在二维有限元分析 (FEA) 上进行了比较，包括齿槽转矩、输出转矩、恒功率速度范围、损耗和效率。结果表明，两种 HPDPMSM 产生相当的输出扭矩并具有相同的最大输出功率，而所提出的 HPDPMSM 具有更低的扭矩纹波、更宽的恒功率工作范围，