复合转子无刷双馈风力发电机的设计与分析  

Design and Analysis of Composite Rotor Brushless Doubly Fed Generator for Wind Turbine

作　　者：张长国 辛瑗 ZHANG Changguo;XIN Yuan(State Grid Yancheng Power Supply Company,Yancheng Jiangsu 224002,China;State Grid Jiangsu Ehv Company,Jiangsu,Nanjing 211102,China)

机构地区：[1]国网盐城供电公司,江苏盐城224002 [2]国网江苏超高压公司,南京211102

出　　处：《微电机》2024年第6期55-61,共7页Micromotors

基　　金：国家自然科学基金面上项目(61973073)。

摘　　要：无刷双馈发电机由于取消电刷滑环,可靠性高,在海上风力发电等领域具有应用前景。为了提升转子的调制能力,本文基于电机气隙磁场调制统一理论研究了短路线圈加凸极磁阻调制器结合的复合转子无刷双馈发电机。首先从理论上揭示了复合调制器比单个调制器可产生更高有用谐波分量的机理,之后对复合转子的结构进行优化,包括凸极上笼条数目与短路线圈的连接方式,最后基于所建立的电机模型,对比了复合转子无刷双馈发电机与传统三种无刷双馈发电机的气隙有用谐波构成,2D有限元以及样机实验结果验证了电机拓扑与分析方法的有效性。Brushless doubly-fed generators have promising applications in offshore wind power generation and other fields due to the elimination of brush slip rings and their high reliability.In order to enhance the modulation capability of the rotor,this paper investigated a composite rotor brushless doubly-fed generator combined with a short-circuited coil plus a salient pole reluctance modulator based on the general airgap field modulation theory for electrical machines.Firstly,the mechanism that the composite modulator can generate higher useful harmonic components than a single modulator was theoretically revealed,and then the structure of the composite rotor was optimized,including the number of cage bars on the salient pole and the connection type of the short-circuited coil.The 2D finite element and experimental results verified the validity of the motor topology and analysis method.

关 键 词：无刷双馈 磁场调制 凸极磁阻 短路线圈 风力发电 

分 类 号：TM315[电气工程—电机]