不同定子绕组结构五相感应电机开路故障时性能对比分析  

Comparison and Analysis of the Performance of Five-Phase Induction Motors with Different Stator Winding Connections under Open-Circuit Conditions

作　　者：范舒婷 孟大伟[1] 艾萌萌 Fan Shuting;Meng Dawei;Ai Mengmeng(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,哈尔滨150080

出　　处：《电工技术学报》2022年第7期1679-1688,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(52077047);黑龙江省自然基金(LH2020E092)资助项目。

摘　　要：为研究不同绕组结构对五相电机的影响,在现行单绕组及星形-五边形组合绕组的基础上,该文提出三种新型组合绕组:五边形-星形绕组、五角星-星形绕组与星形-五角星绕组。首先,建立绕组磁动势模型与电压不平衡系数(VUF)计算模型,利用有限元方法计算电机绕组磁动势(MMF)谐波含量、电压不平衡系数。其次,制作15kW五相感应电机,并以此为样机对不同绕组结构五相感应电机开路故障下的稳态性能进行分析。仿真及实验结果表明,对于单绕组结构,开路状态下五边形绕组最有利于电机运行;而对于组合式绕组,该文提出的五边形-星形绕组相比于现行的星形-五边形绕组,既有磁动势谐波含量低的优点,又可以进一步减小电压不平衡系数,提高可带负载转矩,更有利于电机在开路情况下运行。Based on the existing single winding and star-pentagon combined winding,this paper proposed three new types of combined windings:pentagon-star winding,pentacal-star winding,and star-pentacal winding,to study the effects of different winding connections on five-phase motors.First,the winding magnetomotive force(MMF)model and the voltage unbalance ratio measurement model were developed.The harmonic content of the motor winding MMF and the voltage unbalance ratio were calculated using the finite element method.Secondly,a 15kW five-phase induction motor was designed.Using this as a prototype,the steady-state output of a five-phase induction motor with various winding connections was investigated under open-circuit faults.According to the simulation and experimental results,the pentagon winding is most beneficial to the motor’s operation for the single winding connection under open-circuit faults.Comparing with the existing star-pentagon winding for the combined winding,the pentagon-star winding introduced in this paper not only has a low MMF harmonic content,but can reduce the voltage unbalance ratio and increase the maximum load torque,which is beneficial to the motor running under open-circuit.

关 键 词：五相电机 组合绕组 开路故障 最大转矩倍数 电压不平衡系数 

分 类 号：TM343[电气工程—电机]