新型内置式无轴承永磁同步电机设计与电磁分析  

Design and electromagnetic analysis for new interior bearingless permanent magnet-type synchronous motors

作　　者：李亚伟[1] 朱熀秋[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《武汉大学学报（工学版）》2013年第5期675-680,共6页Engineering Journal of Wuhan University

基　　金：国家自然科学基金项目(编号:60974053);教育部高校博士点基金(编号:20093227110002)

摘　　要：传统内置式无轴承永磁同步电机气隙磁密为矩形波分布,谐波分量较大,其系统难以精准调控.首先根据麦克斯韦张量法分析其径向悬浮力控制机理,运用傅里叶变换,对比了传统内置式永磁转子和新型内置式永磁转子等3种转子结构的气隙磁密和谐波分量;其次采用参数化有限元法,比较了3种转子结构悬浮绕组电流和悬浮力关系.最后,将电机模型和外部电路进行联合仿真,分析了新型内置式转子结构瞬态电磁场运行工况,在设定电机模型为转速为15 000r/min、输出功率为4kW的情况下,计算定子绕组空载感应电势波形,验证了径向悬浮力控制原理.Traditional interior bearingless permanent magnet-type synchronous motors are difficult to con- trol, since its air gap flux density distribution is nearly a square wave. In this paper, firstly the control principle of radial suspension force is deduced by using Maxwell stress tensor method. By using Fourier Transformation, the air-gap flux density distribution and high harmonics of three kinds of rotor structure are analyzed in detail. And then the relationship between winding current and suspension force is calculated using parametric finite element method. A motor model of 15000r/min, 4kW is analyzed using a joint sim- ulation method and the corresponding back electromotive forces of stator winding is figured out, which matches with the suspension control mechanism.

关 键 词：内置式 新型永磁转子 电磁场 无轴承永磁同步电机 联合仿真 

分 类 号：TM341[电气工程—电机]