直驱轮毂式永磁无刷电动机气隙磁场解析数值法分析  

Analytical-Numerical Method Air-Gap Magnetic Field Analysis on the Direct-Drive Wheel-Hub Permanent Magnet Brushless Motor

作　　者：李春江[1] 卢铁斌[1] 章跃进[1] 

机构地区：[1]上海大学,上海200072

出　　处：《微特电机》2011年第6期29-32,共4页Small & Special Electrical Machines

基　　金：高档数控机床与基础制造装备科技重大专项(2009ZX04010-033)

摘　　要：解析数值结合法分析直驱式外转子分数槽表面磁钢永磁无刷电动机气隙磁场。将磁场求解范围划分为气隙区域和扩展槽区域,等效气隙区域磁场解析解得出槽区第一类边界条件,永磁体等效成面电流,用四边形等参元法计算扩展槽区域磁场分布。电机转子以固定角度转动,根据各槽磁场分布计算各相绕组磁链,拟合后对时间求导得到感应电势波形。将计算结果与实验结果比较,符合工程要求,证明了方法的正确性和有效性。Air-gap magnetic field of the direct-drive outer rotor surface-mount permanent magnet fractional slot brushless motor was analyzed with the analytical-numerical method.The domain of the magnetic field was divided into air-gap area and extended slot area.The first boundary condition of the extended slot area was solved with the analytic method of the equivalent air-gap area magnetic field.The permanent magnets are equivalent to the surface current density.The uadrilateral isoparametric element method was used to calculate the magnet field of the extended slot area.The motor was rotating as a fixed step,and the flux of the phase windings was computed according to the magnetic field distribution of each slot.The curve of the induced electromotive force is the derivative to the time of the flux.The calculated result is considered to satisfy the needs in engineering practice by comparing with the test result.It verifies the correctness and effectiveness of the method.

关 键 词：直驱式 分数槽 表面磁钢式永磁无刷电动机 气隙磁场 解析数值结合法 

分 类 号：TM351[电气工程—电机]