磁通反向永磁电机及其关键技术综述

Overview of Flux-reversal Permanent Magnet Machine and Its Key Technologies

磁通反向永磁电机作为定子永磁型无刷电机家族中的一员,由于电枢绕组和永磁体都位于定子侧,因此易于对其进行直接散热。此外,转子为凸极结构,既无永磁体又无绕组,结构十分简单、可靠,适合高速运行。该文首先介绍磁通反向永磁电机的拓扑结构和工作原理;其次,分析该电机的建模方法,并总结各种方法的优缺点;归纳磁通反向永磁电机的各种优化设计方法;讨论"磁通反向"原理及其向它各种拓扑结构的推广,包括直线电机、横向磁场电机和混合励磁电机等;分析该电机在低速和高速场合应用的可能性和潜力;最后对该电机的主要发展方向进行了展望。

As a family member of stator-permanent magnet(PM) brushless machines, flux-reversal PM(FRPM) machine features the advantage of convenient heat dissipations of PMs and armature windings since both of them are located in stator side rather than rotor side. Besides, it is quite suitable for high-speed operation due to its rather simple and reliable rotor structure, without PMs and windings. In this paper, the machine structure and working principle were firstly introduced. Then, the different modeling methods as well as their advantage and disadvantage were analyzed and evaluated. Further, various optimization techniques to improve electromagnetic performance of FRPM machines were discussed. Moreover, the concept of ‘flux reversal’ was extended to some other machine topologies, such as linear PM machine, transverse-flux PM machine, hybrid excitation machine, etc. Thereafter, potentials of feasible applications for FRPM machines in low-speed and high-speed conditions were analyzed. Finally, the future development trends were prospected.