动车组牵引辅助变流器用电磁组件超温保护机制研究  

Study on Over-temperature Protection Mechanism of Electromagnetic Components for EMU Traction-auxiliary Converter

作　　者：王雷 张明涛 徐亚昆 丁巧娅 WANG Lei;ZHANG Mingtao;XU Yakun;DING Qiaoya(CRRC Yongji Electric Co.,Ltd.,Xi’an 710016,China)

机构地区：[1]中车永济电机有限公司,陕西西安710016

出　　处：《铁道车辆》2022年第6期45-49,共5页Rolling Stock

基　　金：山西省科技重大专项资助(20181102007)。

摘　　要：以某型动车组牵引辅助变流器用电磁组件为研究对象,针对数值仿真计算时在其超温保护机制中热点位置定位温度绝对值不准确的缺陷,基于试验提出了一种电磁组件热点精确定位的方法。文章结合电磁组件绕组结构的匝间间隙差异导致冷却空气压力损失情况,选定23个电磁组件测试点进行了长时温升试验,并根据试验结果精准确定了电磁组件热点位置。以此为依据设计出控制单元超温保护的逻辑阈值、温度开关的开启温度和恢复温度,形成了一种电磁组件超温保护机制。最后针对辅助变压器超温保护,在辅助变流器轻载工况下进行了超温保护的故障模拟试验,验证了文章提出的电磁组件热点定位方法及其保护机制的可行性和有效性。该方法弥补了仿真计算的不足,具有一定的工程应用价值。Taking the electromagnetic components used in the traction-auxiliary converter of a certain type of EMU as the research object,aiming at the defect that the absolute value of hot spot locating temperature is not accurate in the numerical simulation calculation of its over-temperature protection mechanism,the paper proposes a method of accurate hot spot locating of electromagnetic components based on experiments.In combination with the pressure loss of cooling air caused by the inter-turn gap difference of the winding structure of electromagnetic components,the paper selects 23 test points of electromagnetic components for long-term temperature rising test,and accurately determines the hot spots of electromagnetic components according to the test results.Based on this,the paper designs the logic threshold value of over-temperature protection of the control unit,the opening temperature and the recovery temperature of the temperature switch,so as to form an over-temperature protection mechanism for electromagnetic components.Finally,aiming at the over-temperature protection of the auxiliary transformer,the paper conducts the fault simulation test of the over-temperature protection under light load condition of the auxiliary converter,verifies the feasibility and effectiveness of the hot spot locating method of electromagnetic components and its protection mechanism.This method makes up for the deficiency of simulated calculation and has certain engineering application value.

关 键 词：动车组 牵引辅助变流器 电磁组件 绕组热点温度 超温保护 

分 类 号：U266[机械工程—车辆工程]