In this article, three new toothed biased flux permanent magnet (PM) motors are introduced and studied, each of which has a specific arrangement of excitation (dc field/PM) and flux path (series/parallel). This results in three main structures, namely, hybrid excited toothed slot-PM (HETSPM), toothed biased flux PM (TBFPM) with series flux path, and, finally, toothed biased flux slot PM (TBFSPM) with hybrid flux path. The TBFSPM structure has improved the average torque, torque ripple, and efficiency compared to other stator-PM motors. The HETSPM structure has improved the average torque per PM, and the TBFPM structure features a very low-torque ripple profile compared to other stator-PM motors. All the topologies have shown a good PM demagnetization resistance and lower PM loss compared to other structures. Moreover, a new Carter’s coefficient is introduced to increase the accuracy of harmonic analysis for split-tooth structures by modeling the nonlinear effect of fringing flux with a new transition function, which has increased the accuracy by 20% compared to the traditional approach. The theoretical analyses have been checked by the 2-D finite element method (FEM), and the TBFSPM structure is prototyped and tested to validate the simulation analyses.

中文翻译：

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增压齿偏磁通永磁电机的研究

在本文中，介绍和研究了三种新型齿形偏磁通永磁 (PM) 电机，每种电机都有特定的励磁（直流磁场/PM）和磁通路径（串联/并联）布置。这导致了三种主要结构，即混合励磁齿槽永磁体 (HETSPM)、具有串联磁通路径的齿形偏置磁通永磁体 (TBFPM)，最后是具有混合磁通路径的齿形偏置磁通槽永磁体 (TBFSPM)。与其他定子-PM 电机相比，TBFSPM 结构提高了平均转矩、转矩脉动和效率。HETSPM 结构提高了每 PM 的平均转矩，而 TBFPM 结构与其他定子-PM 电机相比具有非常低的转矩脉动曲线。与其他结构相比，所有拓扑都显示出良好的 PM 去磁抗性和更低的 PM 损耗。而且，引入了新的卡特系数，通过使用新的过渡函数对边缘通量的非线性效应进行建模，从而提高了裂齿结构谐波分析的准确性，与传统方法相比，准确性提高了 20%。理论分析已通过二维有限元法 (FEM) 进行了检验，TBFSPM 结构进行了原型设计和测试，以验证仿真分析。