飞机无刷交流发电机设计原则及试验仿真研究

旋转整流器式无刷交流发电机是飞机恒速恒频、变速恒频及高压直流电源系统的核心部件。随着电机制造材料的发展，无刷交流发电机的设计也在不断发展与完善。变速恒频及高压直流电源中的无刷交流发电机后级带整流负载，因而电机结构有别于恒速恒频电源中的发电机。为实现体积小、重量轻、性能好的设计目标，讨论了变速恒频电源中无刷交流发电机的设计原则。并结合某一样机实例，对无刷交流发电机进行了数字仿真并对样机进行了性能试验，样机试验及仿真结果基本吻合，说明数字仿真的正确性。针对该样机的设计不足，本文提出了一种改进方案，从而进一步改善了电机结构和工艺性。

Design Principles of Aircraft Brushless AC Generators

Rotating rectifier model brushless AC generator is the core part of the aircraft electrical power generating system including CSCF, VSCF and HVDC systems. The brushless AC generator has been improved with the development of manufacturing mate rials such as ferro magnetic and insulating materials. The characteristics of the generator used in CSCF,VSCF and HVDC systems are compared, so the structure and characteristic of the generator is different from that in CSCF system. This paper analyzes the difference between these two kinds of generators. Furthermore, the parameters of two generators in VSCF and CSCF systems are summerized in a table. In order to reduce the weight and bulk, and to optimize the performance of the VSCF brushless AC generator, design principles of the VSCF brushless AC generator, such as magnetic flux and current density levels, number of poles, winding connections, and shape of armature slots are discussed. The generator in a VSCF system embodies the principles. Test and numerical simulations are done on the prototype. The results of the test and the simulation are coincident, so that the simulation is verified. Finally, an improved design of the main AC generator of the prototype is put forward. The simulation results show that the performance of the generator is feasiable, however, its manufacturability is obviously improved.