A new hybrid magnetic source field modulation machine (HMS-FMM) is proposed in this paper, which can work in a wide speed range and guarantee high quality torque output. Due to the bidirectional flux modulation effect applied in HMS-FMM, a large number of working harmonics can be used to generate torque. Direct current excitation is employed to regulate airgap flux density at stator yoke for wide speed range and low harmonic distortion rate at flux weakening state. In order to improve the air gap flux density, the auxiliary tooth is introduced to connect ferrite and stator tooth for providing parallel magnetic circuit. The proposed topology, operating principle and key design parameters are described. Then, the electromagnetic performances are analyzed using finite element analysis (FEA) including magnetic field distribution, back electromotive force, torque characteristics and irreversible demagnetization assessment for magnets. The FEA-predicted results show that the proposed HMS-FMM is an appealing choice for electric vehicle application, which has the merit of high torque production with low torque ripple and safe operation without demagnetization risk in wide operation range.

中文翻译：

---

一种新型混合磁场调制机


本文提出了一种新型混合磁源磁场调制电机（HMS-FMM），它可以在较宽的速度范围内工作并保证高质量的扭矩输出。由于HMS-FMM中应用了双向磁通调制效应，可以使用大量工作谐波来产生扭矩。采用直流励磁来调节定子轭处的气隙磁通密度，以实现较宽的速度范围和弱磁状态下的低谐波畸变率。为了提高气隙磁通密度，引入辅助齿连接铁氧体和定子齿以提供并联磁路。描述了所提出的拓扑结构、工作原理和关键设计参数。然后，使用有限元分析（FEA）分析电磁性能，包括磁场分布、反电动势、扭矩特性和磁体的不可逆退磁评估。 FEA预测结果表明，所提出的HMS-FMM对于电动汽车应用来说是一个有吸引力的选择，它具有高扭矩产生、低扭矩脉动以及在宽工作范围内安全运行、无退磁风险的优点。