The Electrical Life Test Technology of Relay with DC Motor Load
A specially designed relay, which is widely used in vehicles, used to control low-power DC motor. Such as: wipers, the window glasses and seats of movements. This specially designed relay is provided with two separate excitation coils S1 and S2, which control two groups of switch contact respectively. When the S1 close and S2 open, the motor power is forward rotation, otherwise the motor is reversal. In order to ensure the vehicles overall performance, the quality of this special relay is also one of the important factors. To some extent, the electrical life of relay determines relays life. At present, electrical life testing is an important means to obtain relays life indicator. This article analyzed the changes in load current, on condition that the relay controlled the motor starting, normal stop, locked rotor and from forward rotation to inversion directly. Based on it, the text discussed the main circuit, a testing control logic and explained designing idea of test equipment of computer monitoring and controlling. Application of the principle of energy conservation I2t, we obtained that start testing current duration is 0.21 ～ 0.34 times of the actual motor starting time.The characteristics of the testing device are using simple, flexible, high automation and so on. And its simulation of load current can reflect the actual using condition better.
relay electrical life test DC motor load
Du Taihang Wang Jinwei Miao Qing Qi Ling
School of Electrical Engineering and Automation, Hebei University of Technology, Tianjin, 300130
国际会议
温州
英文
128-133
2009-10-18（万方平台首次上网日期，不代表论文的发表时间）