基于场路耦合时步有限元法的高速无轴承永磁同步电机电磁分析  

Electromagnetic analysis of high-speed bearingless permanent magnet synchronous motor using time-stepping finite element method coupled with Circuits

作　　者：张涛[1] 朱熀秋[1] 孙晓东[1] 杨泽斌[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）》2011年第5期645-649,共5页Engineering Journal of Wuhan University

基　　金：国家863高技术研究发展计划项目(编号:2007AA04Z213);江苏省2010年研究生科研创新计划基金项目(编号:CX10B_270Z)

摘　　要：无轴承永磁同步电机气隙磁场谐波关系复杂,难以实现高速悬浮运行.在分析其悬浮控制机理基础上,研究了静态气隙磁场分布,采用傅里叶变换,比较了不同永磁体磁化方式下的气隙磁密和高次谐波,得出永磁体采用分块结构消除高次谐波的实际效果;基于参数化有限元法,计算了悬浮力随悬浮绕组电流变化关系;对于瞬态磁场,采用场路耦合时步有限元法对转速为12 000 r/min,输出功率为4.3 kW的无轴承永磁同步电机进行瞬态分析,计算了定子绕组空载反电动势波形,并验证了无轴承永磁同步电机悬浮控制机理.结合实验数据,验证了理论分析的正确性和有效性.The bearingless permanent magnet synchronous motor is difficult to achieve high-speed operation for the high complexity of the internal magnetic field.To solve this problem,the static air-gap magnetic field distribution is first analyzed based on the analysis of suspension control principle.The practical effect of eliminating high-order harmonics using permanent magnets with partitioned structure is then presented based on the comparison of the air-gap flux density and high harmonics using the Fourier transformation.And then the relationship between suspension force and winding current is calculated using parametric finite element method.For transient magnetic field,a 12000r/min,4.3kW bearingless permanent magnet synchronous motor is analyzed using time-stepping finite element method and the corresponding back electromotive forces of stator winding is calculated,which agree well with the suspension control mechanism of the bearingless permanent magnet synchronous motor.The experimental data and result verify the correctness and effectiveness of the presented theoretical analysis method.

关 键 词：有限元法 电磁场 高速电机 无轴承永磁电机 时步 

分 类 号：TM341[电气工程—电机]