基于涡流损耗分析的永磁型无轴承电机优化  

Optimization of permanent magnet type bearingless motor using eddy current loss analysis

作　　者：张涛[1,2] 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 [2]淮阴工学院,电子与电气工程学院,江苏淮安223003

出　　处：《电机与控制学报》2012年第10期58-62,70,共6页Electric Machines and Control

基　　金：国家863高技术研究发展计划项目(2007AA04Z213);国家自然科学基金(60974053);江苏省高校科研成果产业化推进工程资助项目(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：针对永磁型无轴承电机在高速运行时,转子涡流损耗导致永磁体发热严重,导致永磁体存在不可逆退磁的难题。在分析永磁型无轴承电机转矩和径向力产生机理的基础上,研究了径向力、转矩绕组磁场和悬浮绕组磁场的相对运动关系,给出了永磁型无轴承电机单一方向稳定可控径向力的产生条件,采用2D耦合电路瞬态有限元法,计算了转子空载涡流损耗,比较了永磁型无轴承电机极对数为PB=PM+1和PB=PM-1时的转子涡流损耗。研究结果表明,永磁型无轴承电机转子涡流损耗主要是由悬浮绕组磁场产生,采用PB=PM+1结构时,转子涡流损耗最小,PM=1,PB=2结构最适合高速运行。It is important to clarity the rotor tor for temperature rising to induce irreversible demagnetization The torque and radial suspension torte producing mechanisms of permanent magnet type bearingless motor were introduced The relative motion relationships among radial suspension force, rotor magnetic field and suspension winding magnetic field were analyzed. The necessary conditions of producing stable controllable radial suspension force in single direction were concluded. Using 2D timesteeping finite element method coupled with external circuit, the rotor noload eddy current loss and the rotor eddy current losses in permanent magnet type bearingless were calculated and compared. 2nae research results have shown motor with PB = PM ＋ 1 and PB = PM- 1 produced by suspension windings magnetic field. The permanent that the rotor eddy current loss mainly magnet type bearingless motor with PB = PM ＋ 1 has the minimum eddy current losses and the motor with PM = 1 ,PB =2 is the most suitable for high speed operation.

关 键 词：高速电机 永磁电机 无轴承电机 涡流损耗 有限元法 

分 类 号：TM341[电气工程—电机]