长电缆传输脉冲波对电机端过电压影响的研究  

Research on the Effects of Pulse Waves Through a Long Cable on Motor Terminal Overvoltage

作　　者：张椿[1] 戴鹏[1] 宗伟林[1] 潘庆山[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《电气传动》2013年第2期36-39,共4页Electric Drive

摘　　要：基于传输线理论分析了脉冲波在电缆中的反射过程及电机端过电压的产生机理,通过Matlab仿真软件对脉冲波反射过程进行了分析。根据反射原理,对电机端各反射波分量和入射波分量进行叠加,得到电机端电压。通过PSpice仿真软件建立了单个脉冲-无损电缆-电机仿真模型,并对电机端产生过电压临界脉冲传输的时间做了仿真研究;在此基础上建立了PWM脉冲-无损电缆-电机仿真模型,仿真结果验证了PWM脉冲占空比最大时电机端电压达到最大值。The reflection of pulse waves through a long cable and the mechanism of motor terminal overvoltage using transmission line theory was analyzed.The pulse wave reflection prosses was simulated with Matlab software. According to the reflection principle, motor terminal over-voltage is the piling up of the incident and reflected wave components.Pusle-lossless cable-motor model was set up in PSpice software, while the critical state and the most likely moment occurring motor terminal overvohage was studied with the model.And then PWM pulse-lossless cable-motor model was set up to verify that motor terminal voltage reached its maximum as PWM pulse duty cycle is the largest.

关 键 词：电机端过电压 电缆 脉冲波反射 

分 类 号：TM464[电气工程—电器] TM726.4