磁轨制动器放电电路设计及对复位过程的影响研究  

Research on the Discharge Circuit Design of Electromagnetic Track Brake and Its Influence on Reset Process

作　　者：王明星 李敬 杨磊 袁文琦 夏志远 WANG Mingxing;LI Jing;YANG Lei;YUAN Wenqi;XIA Zhiyuan(CRRC Qingdao Sifang Rolling Stock Research Institute Co.,Ltd.,Qingdao 266031,China)

机构地区：[1]中车青岛四方车辆研究所有限公司,山东青岛266031

出　　处：《铁道车辆》2023年第2期42-47,共6页Rolling Stock

摘　　要：磁轨制动器属大电感储能器件,需设置放电电路以避免过高的反向电压对驱动电路、开关器件等造成损坏。文章设计了纯电阻支路、二极管支路及电容支路等3种放电方案,基于KVL定律,推导了电感电压及电流方程,计算得到了磁感应强度、电磁吸力、气隙、速度、加速度随时间的变化关系。最后,通过建立系统的自由振动微分方程,研究了3种方案对磁轨制动器复位过程的影响。研究结论显示:纯电阻支路的衰减时间最短;二极管支路的感应电压最小;电容支路的衰减时间最长,感应电压最大,但具备消磁功能;3种放电支路对磁轨制动器复位过程的影响基本一致。The electromagnetic track brake is a large inductance energy storage device,so it is necessary to set up a discharge circuit to avoid damage to the driving circuit and switching devices caused by excessive reverse voltage.In this paper,three discharge schemes of pure resistance branch,diode branch and capacitor branch are designed.Based on the KVL law,the inductance voltage and current equations are derived,and the relationship between magnetic induction intensity,electromagnetic force,air gap,velocity and acceleration with time is calculated.By establishing the free vibration differential equation of the system,the influence of three schemes on the reset process of the magnetic rail brake is studied.The results show that the attenuation time of pure resistance branch is the shortest.The induced voltage of diode branch is minimum.Capacitor branch has the longest decay time and the largest induced voltage,but it has demagnetization function.The influence of the three discharge branches on the reset process of the magnetic rail brake is basically the same.

关 键 词：磁轨制动器 放电电路 复位过程 仿真计算 

分 类 号：U270.35[机械工程—车辆工程]