考虑偏心及绕组耦合的无轴承永磁同步电机建模  

Modeling of a Bearingless Permanent Magnet Synchronous Motor Considering Rotor Eccentricity and Coupling Relationship of Windings

作　　者：孙晓东[1,2] 陈龙[1] 杨泽斌[2] 朱熀秋[2] 左文全[2] 施凯[2] 

机构地区：[1]江苏大学汽车工程研究院,镇江212013 [2]江苏大学电气信息工程学院,镇江212013

出　　处：《电工技术学报》2013年第3期63-70,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(61104016);江苏省高校自然科学研究面上资助项目(11KJB510002);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：在阐述无轴承永磁同步电机转子悬浮机理的基础上,根据电机磁路原理,建立了无轴承永磁同步电机电感矩阵解析模型。基于该解析模型和电磁场虚位移原理,推导了无轴承永磁同步电机的较为精确的数学模型。该解析模型充分考虑了转子偏心以及两套绕组的耦合关系,能有效地描述电机产生的径向悬浮力和电磁转矩。为了验证该模型的正确性和可行性,在一台表面贴装式无轴承永磁同步电机上进行了的实验研究。实验结果表明利用该模型能够有效地提高无轴承永磁同步电机稳定悬浮运行的稳态精度和动态响应速度。The producing principle of radial suspension force for bearingless permanent magnet synchronous motors （BPMSMs） is elaborated. And then, according to the magnetic circuit principle of BPMSMs, the analytical model of the inductance matrix is obtained. Based on the inductance model and virtual displacement principle, a relatively accurate mathematical model of BPMSMs is derived. This analytical model takes the rotor eccentricity and the coupling relationship of the windings into account, and could describe the radial suspension force and electromagnetic torque more accurately. In order to confirm the validity and fe^sibility of this model, experimental studies are carried out on a surface-mounted BPMSM. Experimental results indicate that the static precision and dynamic response of the BPMSM can be effectively enhanced by using the proposed model.

关 键 词：无轴承电机 永磁同步电机 径向悬浮力 电磁转矩 建模 

分 类 号：TM341[电气工程—电机] TM351