摘要
混合励磁电机具有两路磁源:永磁体与励磁绕组,因此兼具功率密度高、调磁方便的优点。本文针对一种新型切向/径向混合励磁同步发电机进行了研究,通过对磁路的分析得到了永磁磁通与电励磁磁通关系,从理论上研究了混合励磁发电机主气隙磁场的可调性。同时,研究了结构参数对电机性能的影响,为该电机的进一步优化提供了依据。由于该种电机在无励磁时仍有输出电压,针对这一特点进行了无刷化设计。比起传统三级式无刷化电机,运用该种电机作为主发电机的无刷化系统省去副励磁机/外部电源,减小了电源系统的体积重量。同时,由于永磁磁通的存在,解决了传统电励磁电机作为起动机时励磁困难的问题。本文对无刷励磁发电系统进行建模,分析了旋转整流器对励磁机输出励磁电压的影响,分析了旋转整流器的两种工作状态。最后,制作了相应的实验样机,对无刷励磁系统进行了实验。实验结果证明系统设计的正确性,其设计流程和方法对于无刷励磁发电系统具有一定的参考价值。
Hybrid excitation synchronous generator has two magnetic sources： Permanent magnets and exciting windings. A novel tangential/radial hybrid excitation synchronous generator （T/R-HESG） is studied in this paper. The relationship of fluxes produced by permanent magnets and exciting windings is studied. The flux of air gap in HESG can be controlled. Meanwhile, the parameters of structure are analyzed for optimization. A novel brushless method is designed, because the characteristic of T/R-HESG. Comparing with traditional brushless scheme. The problems such as complex system and long axial length can be overcome by novel method. Also, the problem of excitation of starter can also solved by this method. The design of exciter is special. The method of exciter design is studied. The model of the system is built. The influence of commutation overlap angle is studied. Two operation model of rotating rectifier are anylzed. A prototype is made to do experiment. The experimental studies of generation system are to verify the correctness of design. The process and design can be referred to for the design of brushless generation system.
出处
《电工技术学报》
EI
CSCD
北大核心
2013年第3期127-133,共7页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(50977044)
关键词
混合励磁
旋转整流器
无刷
换相重叠角
Hybrid excitation, rotating rectifier, brushless,commutation overlap angle
