LNG泵用低温高速永磁电机偏心故障动态电磁力  

Dynamic electromagnetic force of cryogenic high-speed permanent magnet motors with eccentric fault

作　　者：戈宝军[1] 刘海涛 王立坤[1] 林鹏[1] 温亚垒 GE Bao-jun;LIU Hai-tao;WANG Li-kun;LIN Peng;WEN Ya-lei(School of Electrical and Electronic Engineering,Harbin University of Science and Technology,Harbin 150080,China)

机构地区：[1]哈尔滨理工大学电气与电子工程学院,黑龙江哈尔滨150080

出　　处：《电机与控制学报》2022年第5期55-64,共10页Electric Machines and Control

基　　金：军民融合专项项目(JMRH2018XM03);国家自然科学基金(51907042);黑龙江省优秀青年科学基金(YQ2021E038)。

摘　　要：针对低温环境下材料性质改变引起的电机电磁力性能变化问题,本文对低温高速永磁电动机在偏心故障前后的电磁力分布和变化进行了分析,提出一种基于麦克斯韦张量法的电磁力计算模型,在此基础上对护套表面位置、定子齿顶、定子齿壁偏心故障前后的电磁力进行计算,并与常温下电磁力进行了比较。定量阐述了偏心故障前后电磁力的演变规律与应力集中位置,从电磁场参数、电磁转矩以及气隙电磁力时空特性三个角度验证了电磁力计算结果的合理性。电磁力的分析方法与结果为同类电机的电磁力计算提供了借鉴,为电机形变分析及结构优化设计奠定了基础。Aiming at the issue that the change of the material properties of motors affects the electromagnetic force characteristics in cryogenic environment,the dynamic electromagnetic force distribution characteristics and variation rules before and after eccentric fault of a cryogenic high-speed permanent magnet motor was studied.An electromagnetic force calculation model based on Maxwell tensor method was proposed.The dynamic electromagnetic forces before and after eccentric faults of seelve surface,stator tooth top and wall were calculated.The difference of the electromagnetic force distribution compared with that under room temperature was analyzed.The evolution law of electromagnetic force and the location of stress concentration before and after eccentric fault were quantitatively described.The rationality of the calculation results of electromagnetic force was verified from three aspects.Electromagnetic field parameters,torque and temporal and spatial characteristics of air gap electromagnetic force.The analysis method and results of electromagnetic force provide a reference for the electromagnetic force calculation of similar motors,and lay a foundation for the deformation analysis and structural optimization design of motors.

关 键 词：低温 高速永磁电机 偏心故障 麦克斯韦张量法 电磁力 电磁转矩 

分 类 号：TM351[电气工程—电机]