Benefiting from flexible flux control and short-circuit withstand ability, the hybrid excitation machine is an emerging starter generator solution for hybrid electric vehicle propulsion. However, to realize a brushless hybrid design in conventional permanent magnet machines, a three-dimensional magnetic circuit is usually adopted, leading to complicated mechanical structure and torque density sacrifice. To address this issue, a new relieving-dc-saturation hybrid excitation Vernier machine is proposed in this article, which integrates good torque density and bidirectional flux control within a simple and brushless structure. The key is to artificially construct reluctance effect in a consequent-pole Vernier permanent magnet machine (CP-VPMM) by introducing extra dc field excitation equipped with the relieving-dc-saturation ability. In this way, the advantages of bidirectional flux control in stator-dc-excited reluctance machine and good torque density in CP-VPMM are well combined in this topology, making it especially suitable for multimode starter generator application. In this article, the machine structure and its design mechanism are introduced, with its electromagnetic performance evaluated by the finite-element simulation. A prototype is manufactured and tested. Experiment results verify the feasibility of this new topology.

中文翻译：

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一种用于混合动力汽车起动发电机应用的新型泄放直流饱和混合励磁游标机


得益于灵活的磁通控制和短路承受能力，混合励磁机是一种新兴的混合动力电动汽车驱动启动发电机解决方案。然而，为了在传统永磁电机中实现无刷混合设计，通常采用三维磁路，导致机械结构复杂并牺牲扭矩密度。为了解决这个问题，本文提出了一种新型的释放直流饱和混合励磁游标机，它在简单的无刷结构中集成了良好的扭矩密度和双向磁通控制。关键是通过引入具有消除直流饱和能力的额外直流励磁，在交替极游标永磁电机（CP-VPMM）中人为地构造磁阻效应。这样，定子直流励磁磁阻电机双向磁通控制的优点和CP-VPMM良好的转矩密度在该拓扑中得到了很好的结合，使其特别适合多模式起动发电机应用。本文介绍了该机构的结构及其设计机理，并通过有限元仿真评估了其电磁性能。制造并测试原型。实验结果验证了这种新拓扑的可行性。