槽配合对单绕组双速直槽异步电动机空载磁场及损耗的影响  

Influence of Slot Combination Change on No-Load Magnetic Field and Loss of Single-Winding Two-Speed Motor with Straight Slot System

作　　者：安俊义[1] 赵海森[1] 刘晓芳[1] 孙明骁 肖成东[1] 张鑫磊[1] 

机构地区：[1]华北电力大学,北京102206

出　　处：《微特电机》2015年第5期17-21,共5页Small & Special Electrical Machines

基　　金：国家自然科学基金项目(51307050);中央高校基本科研业务费专项资金资助

摘　　要：大功率单绕组双速电机转子通常采用直槽结构,无法通过斜槽来削弱齿谐波。为了研究直槽情况下,定转子槽配合变化对单绕组双速电机空载磁场及损耗的影响,以一台定子槽数为48的15/3 k W,4/8极单绕组双速电机为例,利用时步有限元法对比分析了不同槽配合时电机内部磁场及铁耗、定转子铜耗的变化规律。结果表明:随转子槽数增加,气隙径向磁场基本不变而切向磁场高次谐波含量增加;与少槽配合相比,多槽配合时定子铜耗和转子高频附加铁耗均略微增加;转子铜耗先减小后增加且在多槽配合时远大于少槽配合。样机实验对比验证了该分析的正确性。研究结果可为合理选择单绕组双速电机槽配合提供重要的理论依据。For high-power single-winding two-speed motor with the straight rotor, the slot harmonic can not be weak- en by skewed rotor bars. To study the influence of the different slot combination on no-load magnetic field and loss of this kinds of motors, taking a 15/3kW, 4/8 poles single-winding two-speed motor with 48 stator slots as an example, the mag- netic fields, iron losses and copper loss of the motor with the different slot-combinations were analyzed by time-step finite element method. The results show that radial air gap magnetic field remains essentially unchanged and tangential magnetic field higher harmonic component increases as the rotor slot increases. The stator copper loss and iron loss caused by high frequency harmonic field is higher when the rotor slot number is more than stator ones, but both of them increases slightly. Furthermore, as the rotor slot number increasing, the rotor copper loss first decreases and then increases obviously. The correction of the analysis was verified by experiment on the prototype. The achievement in this paper can provide an impor- tant theoretical fundamental for selecting the slot combination of the single-winding two-speed motors.

关 键 词：槽配合 双速电动机 直槽 磁场 空载损耗 时步有限元法 

分 类 号：TM343[电气工程—电机]