低速大转矩永磁电机弱磁特性计算分析  

Calculation and Analysis of Flux-weakening Characteristics of the Low-speed High-torque Permanent Magnet Motor

作　　者：马鑫[1] 郑庆华 闫志强 周挺[1] MA Xin;ZHENG Qinghua;YAN Zhiqiang;ZHOU Ting(National Engineering Research Center for Rare-earth Permanent Magnet Machines(Shenyang University of Technology),110870;Jiangxi Gongbu Machinery Co.,Ltd.,331200;Dalian Teikoku Canned Motor Pume Co.,Ltd.,116043)

机构地区：[1]国家稀土永磁电机工程技术研究中心(沈阳工业大学),110870 [2]江西工埠机械有限责任公司,331200 [3]大连帝国屏蔽电泵有限公司,116043

出　　处：《电机技术》2023年第6期1-9,共9页Electrical Machinery Technology

摘　　要：针对内置式低速大转矩永磁电机数学模型以及永磁电机弱磁控制策略,提出适合低速永磁电机弱磁设计的解析计算方法。结合变频器逆变电压和输出电流,分析反电动势、磁路结构、电感等参数与弱磁调速范围的关系。同时,研究分析空载反电动势的选取范围;不同磁路结构对电感、转矩和弱磁范围的影响;交轴磁路饱和对弱磁转矩的影响;定子电阻在弱磁高速段对输出功率的影响。在此基础上试制一台样机,进行了真机验证,证明了理论与计算分析的正确性。According to the mathematical model of built-in low-speed and high-torque permanent magnet mo-tor and the flux-weakening control strategy of permanent magnet motor,the analytical calculation method suitable for design offlux-weakening of the low-speed permanent mag-net motor is put forward.Combining the inverter voltage by frequency controllers and the output current,relationship between such parameters as back electromotive force,mag-netic circuit structure&inductance and the speed range offlux-weakening is analyzed.At same time,the selection range of no-load back-EMF,the influence by different mag-netic circuit structure on the inductance,torque&weak magneticfield range,the influence by quadrature magnetic circuit saturation on theflux-weakening torque and the in-fluence by stator resistance on the output power in the high speed section of weak magneticfield are studied and ana-lyzed.On this basis,a prototype is trial-manufactured and experimental research is carried out,to verify correctness of the theoretical and computational analysis.

关 键 词：低速大转矩 永磁 弱磁 内置结构 

分 类 号：TM302[电气工程—电机]