摘要
横向磁通永磁电机电负荷和磁负荷在空间上相互独立,设计灵活,具有较高的转矩密度,特别适合于低速风力发电机领域的应用。作者基于磁通切换和横向磁通电机的原理,提出了一种磁通切换型横向磁通永磁发电机,其永磁体置于定子中,转子结构简单,它比传统横向磁通永磁电机具有更好的定子空间利用率以及更高的气隙磁通密度。该文介绍了该种电机的结构和原理,给出了电磁设计方法,根据尺寸方程和经验公式推导出相应的电磁设计公式。比较了不同永磁体厚度时的电机主磁通与漏磁通。采用三维有限元方法分析了电机的磁场,给出了线圈磁链和感应电势波形。根据理论计算,研制了实验样机,并进行了空载和负载试验,理论分析与实验结果基本吻合。
Transverse-flux permanent magnet machine was especially suitable for low speed wind power generation because it featured a spatial decoupling between electric load and magnetic load with flexible design and has higher torque density. Based on the principle of flux switching and transverse-flux machine,a flux switching transverse-flux permanent magnet generator was presented. Its permanent magnets were embedded in the stator,and the rotor structure was simple,which can be an excellent candidate for direct drive wind generator by considering that it had larger space utilization ratio and higher air gap flux density than traditional transverse flux machine. The structure and principle of this machine was introduced,and the electromagnetic design was presented in this paper. The electromagnetic formulae are derived according to sizing equation as well as empirical formulae. The main flux and leakage are compared under different widths of permanent magnets. In additional,the no-load flux-linkage and EMF waveforms are depicted by 3-D finite element method. According to theoretical calculation,a prototype is manufactured and no-load and load experiments are carried out. The theoretical analyses agrees with the experiment results well.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2010年第21期67-72,共6页
Proceedings of the CSEE
基金
高等学校博士学科点专项科研基金资助课题(20090092110033)~~
关键词
磁通切换
有限元分析
电磁设计
横向磁通
风力发电机
flux switching
finite element analysis
magnetic circuit method
transverse-flux
wind generator
