摘要
退磁故障的精准定位对于预防电机系统发生灾难性故障和制定系统运行维护策略至关重要。针对多极数永磁同步电机(PMSM)退磁故障情况复杂,退磁故障定位难的问题,本文提出一种基于环轭型探测线圈的PMSM局部退磁故障定位方法。该方法只需在定子侧安装3个环轭线圈以获取包含退磁故障信息的信号;基于3个环轭线圈的感应电势,运用信号的基本运算构造退磁定位信号并按一定的规则对其进行分区;利用分区后的退磁定位信号的波形识别退磁故障类型,确定对应区域退磁永磁体的状态;利用一个机械周期的信号确定所有永磁体的状态,进而实现退磁永磁体的精准定位。首先介绍了退磁定位信号的构造与建模方法。然后,利用所建立的分区数学模型研究退磁定位信号在预设故障类型下的波形。最后,提出基于退磁定位信号分区的局部退磁故障精准定位方法。仿真和实验结果表明所提出的方法能对任意多个永磁体退磁故障(退磁程度不低于10%)进行精准定位。该研究为PMSM故障定位提供新方法,为故障后的运行策略制定和维护策略制定奠定基础。
Exact localization of demagnetized permanent magnets(PMs)is crucial to prevent catastrophic fault of motor system and develop system operation and maintenance strategies.The demagnetization fault cases of permanent magnet synchronous motors(PMSMs)with multiple PMs are complex,and hence demagnetization fault localization is difficult.A toroidal yoke search-coil-based method for locating fault in PMSM with local demagnetization fault is proposed.In the presented demagnetization fault localization method,three toroidal yoke coils wound around the stator yoke to obtain the signature containing demagnetization fault information.Based on the output signals of three search coils,the demagnetization fault location signals(DFLs)were produced by basic calculation,which are partitioned according to certain rules.Demagnetization fault type can be identified through waveform of partition DFL,and the healthy condition of all corresponding PMs can be determined through one mechanical period.Then,the location of demagnetized PMs can be detected.First,the methods for constructing and modelling DFLs were developed.Waveforms of partitioned DFLs under preset fault types were studied by using the established partition mathematical model.Finally,the approach for diagnosing the location of local demagnetization fault in PMSM using DFLs partition was proposed.Simulation and experimental results show that the proposed method can accurately locate the demagnetization fault(demagnetization severity is no less than 10%)of any number of PMs.It provides a new scheme for demagnetization fault localization and provides a reference for fault post-processing and fault-tolerant control of PMSM.
作者
陈昊
高彩霞
桑晓晨
许孝卓
封海潮
司纪凯
CHEN Hao;GAO Caixia;SANG Xiaochen;XU Xiaozhuo;FENG Haichao;SI Jikai(School of Emergency Management,Henan Polytechnic University,Jiaozuo 454003,China;School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454003,China;Leeds College,Southwest Jiaotong University,Chengdu 610097,China;School of Electrical Engineering,Zhengzhou University,Zhengzhou 450001,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2023年第4期97-110,118,共15页
Electric Machines and Control
基金
国家自然科学基金(52177039)
河南理工大学博士基金资助项目(B2021-22,B2018-48)
河南省科技攻关项目(222102220017)。
关键词
永磁同步电机
局部退磁
故障定位
分区数学模型
探测线圈
感应电势残差
permanent magnet synchronous motor
local demagnetization fault
fault localization
partitioned mathematical model
search coil
residual back electromotive force
