内置式无轴承永磁同步电机径向悬浮力建模  

Radial suspension force modeling on interior bearingless permanent magnet synchronous motors

作　　者：朱熀秋[1] 魏杰[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：《电机与控制学报》2013年第5期45-50,56,共7页Electric Machines and Control

基　　金：国家863高技术研究发展计划(2007AA04Z213);江苏省高校科研成果产业化推进工程项目(JHB2012-39);江苏高校优势学科建设工程资助项目(苏政办发[2011]6号)

摘　　要：针对内置式无轴承永磁同步电机悬浮控制时的因径向悬浮力数学模型建立不准确而导致的控制性能不佳的问题,提出了内置式无轴承永磁同步电机径向悬浮力的精确数学模型建立方法。介绍了内置式无轴承永磁同步电机的结构和工作原理。对内置式无轴承永磁同步电机气隙磁场进行了分析,采用麦克斯韦应力张量法推导了其径向悬浮力的精确数学模型。采用有限元分析方法对推导的径向悬浮力数学模型进行验证分析,并对内置式无轴承永磁同步电机的最大径向悬浮力有限元仿真计算结果、理论计算结果和实际测量结果进行了比较。分析结果表明,采用麦克斯韦应力张量法建立的径向悬浮力数学模型误差小、精度髙。When interior bearingless permanent magnet synchronous motor （IBPMSM） is controlled for suspension, there exists a problem that the inaccurate mathematical model of radial suspension force leads to poor control performance. So the establishment method of accurate mathematical model of radial suspension force for IBPMSM was proposed. Firstly the structure and operation principle of IBPMSM was introduced. Then the air-gap flux density distribution of IBPMSM was analyzed in detail, and the accurate mathematical model of radial suspension force was deduced by using Maxwell＇s stress tensor method. Finally the mathematical model of radial suspension force was validated by finite element method （FEM） , the calculation result of FEM. The theoretical calculation result and measured result were compared. Analysis results show that the mathematical model of radial suspension force established by Maxwell＇ s stress tensor method is of low error and high precision.

关 键 词：无轴承电机 内置式无轴承永磁同步电机 建模 有限元分析 径向悬浮力 

分 类 号：TM351[电气工程—电机]