This article investigates novel fractional slot nonoverlapping winding hybrid excited (HE) machines with consequent-pole permanent magnet (PM) rotors. The proposed machines accommodate the rotor PM and stator field winding separately, which has solved the spatial confliction of double excitations. Different consequent-pole interior PM rotor configurations are extended to retain the PMs and utilize the flux-concentrating effect. Then, the relationship of field and armature current ratio with the PM and wound field fluxes is identified theoretically, which provides design and optimization guidelines for the HE machines. Furthermore, the HE machines are optimized and compared with conventional PM machines. It is revealed that the HE machines exhibit enhanced torque density with flux-enhancing field excitation, and extended operation range with flux-weakening field excitation. Besides, the HE machine utilizing flux-concentrating effect exhibits the highest PM torque but sacrificed flux regulation capability due to magnetic saturation. Finally, the HE prototypes with different rotor configurations are fabricated and tested to validate the analyses.

中文翻译：

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不同转子拓扑的新型分数槽非重叠绕组混合励磁电机的研究


本文研究了具有交替极永磁 (PM) 转子的新型分数槽非重叠绕组混合励磁 (HE) 电机。该电机将转子永磁电机和定子励磁绕组分开容纳，解决了双励磁的空间冲突。扩展了不同的交替极内部永磁转子配置，以保留永磁体并利用通量集中效应。然后，从理论上确定了磁场和电枢电流比与永磁体和绕线磁场磁通的关系，这为HE电机的设计和优化提供了指导。此外，HE 机器还经过优化并与传统 PM 机器进行比较。结果表明，HE 机器通过增强磁通励磁表现出增强的扭矩密度，并通过弱磁通励磁表现出扩展的运行范围。此外，利用磁通集中效应的HE电机表现出最高的永磁扭矩，但由于磁饱和而牺牲了磁通调节能力。最后，制造并测试了具有不同转子配置的 HE 原型以验证分析。