恒定气隙接触器无位置传感器控制与动态特性分析  

Sensorless Control and Dynamic Characteristics Analysis of Constant Air Gap Contactors

作　　者：王公润 董恩源[1] 王永兴[1] 尹升 吉盈东 Wang Gongrun;Dong Enyuan;Wang Yongxing;Yin Sheng;Ji Yingdong(School of Electrical Engineering Dalian University of Technology,Dalian 116024 China)

机构地区：[1]大连理工大学电气工程学院,大连116024

出　　处：《电工技术学报》2023年第18期5049-5060,共12页Transactions of China Electrotechnical Society

基　　金：省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学)开放课题基金资助项目(EERI_KF2020009)。

摘　　要：为减少接触器的触头弹跳,针对恒定气隙接触器提出一种位置预测方法,使用等效磁路法与参数辨识从永磁体磁链中提取位置信息,随后依据位置信息实施控制。建立磁力机构等效磁路模型,推导出动态磁链、位移与电流的映射关系,实验验证了映射关系的合理性。通过实验获得位移、电压与电流,根据实验数据计算磁链,采用多元回归的方法获取位移的映射的参数,完成了接触器位置预测。通过有限元模型的参数扫描功能,建立驱动力、磁链的两个曲面,通过插值的方法完成接触器的建模,从而进行位置预测以及无位置控制的仿真。使用磁力机构驱动的接触器进行实验,实验结果表明,新型无位置传感器控制方法适用于恒定气隙接触器,验证了位置预测的准确性与控制方法的有效性。A contactor is an electrical appliance that connects and disconnects circuits,widely used in power switching,motor control,rail transit,and new energy power generation.During the closing process,the contact bounce collision will produce arcs,and the high-frequency long-time bounce process will significantly shorten the electrical life of the contactor.It is feasible to use sensorless control to suppress contact bounce.The sensorless control technology of the constant air gap contactor is studied.Position sensorless control includes position prediction and dynamic control.The equivalent magnetic circuit method and parameter identification are used to realize position prediction.Based on position prediction,the simulation and experimental research of dynamic control are carried out.A position sensorless control method is proposed for the constant air gap contactors to reduce the contact bounce of the contactor.The position information is extracted from the permanent magnet flux linkage through the equivalent magnetic circuit method and parameter identification.Then the actuator is controlled according to the location information.The equivalent magnetic circuit model of the electromagnetic force driving actuator(EMFA)is established.The mapping relationship between dynamic flux linkage,displacement,and current is then deduced.The rationality of the mapping relationship is verified by the“fixed method”and“prediction method”.The displacement,voltage,and current are obtained through experiments,the flux linkage is calculated according to the experimental data,and the parameters of the displacement mapping are obtained by the multiple regression method.Afterward,the position prediction of the contactor is completed.The predicted displacement is compared with the measured displacement,verifying the accuracy of position prediction.Two surfaces of the driving force and flux linkage are established through the parameter scanning function of the finite element model.The modeling of the contactor is completed by interp

关 键 词：恒定气隙接触器 控制 触头弹跳 磁力机构(EMFA) 动态特性 

分 类 号：TM572[电气工程—电器]