摘要
针对电气开关器件在合闸过程中动静触头碰撞接触产生的振动弹跳问题,在综合考虑非线性电磁力和碰撞接触力的基础上,建立了接触器触头系统的2自由度振动方程并进行求解,通过高速摄影实验揭示了触头弹跳偏转规律。结果表明:理论与实验结果高度一致;触头在碰撞后尚未分离,铁芯就发生了碰撞,进一步加剧了触头弹跳;铁芯发生第2次弹跳时,不影响触头的弹跳;动触头移动轨迹在发生第1次碰撞后,产生第1次偏转,发生第2次碰撞后,偏转位移和角度相反且均小于第1次偏转。研究结果为进一步控制和减小触头弹跳提供了理论依据。
Aiming at the vibration bounce problem caused by the collision and contact of the static and dynamic contacts of the electrical switching device during the closing process,a two-degree-of-freedom vibration equation of the contact system is established and solved based on the comprehensive consideration of the nonlinear electromagnetic force and the collision contact force,. For the first time through a high-speed photography experiment,the law of contact bounce and deflection is revealed. The results show that the theoretical and experimental results are highly consistent. The iron core collides before the contact is separated after the collision,which further aggravates the contact bounce. The second bounce of the iron core does not affect the spring of the contact. After the first collision,the movement track of the moving contact produces the first deflection,and after the second collision,the deflection displacement and angle are opposite and less than the second. The results provide a theoretical basis for further control and reduction of contact bounce.
作者
黄克鹏
王发展
赵明基
郭宝良
区达铨
HUANG Kepeng;WANG Fazhan;ZHAO Mingji;GUO Baoliang;OU Daquan(School of Mechanical and Electrical Engineering,Xi′an University of Architecture and Technology Xi′an,710055,China;ABB Xinhui Low Voltage Switchgear Co.,Ltd.Jiangmen,529000,China)
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2022年第6期1177-1183,1247,1248,共9页
Journal of Vibration,Measurement & Diagnosis
基金
陕西省自然科学基金重点资助项目(2011J2009)。
关键词
电气开关
交流接触器
触头弹跳
2自由度振动方程
高速摄影
electrical switch
AC contactor
contact bounce
two-degree-of-freedom vibration equation
high-speed photography
