PWM脉波传输电压反射抑制策略在大功率感应电机驱动中的应用  

The Application of the Voltage Reflection by PWM Pulse Restraint Strategy in the High Power Induction Motor Drive

作　　者：薛高飞[1] 胡安[1] 潘启军[1] 孟进[1] 孟庆云[1] 

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室,武汉430033

出　　处：《电工技术学报》2013年第10期249-256,共8页Transactions of China Electrotechnical Society

基　　金：国家高科技研究发展计划(863计划)(2011AA040302);国家自然科学基金(51077129)资助项目

摘　　要：PWM变频器带长功率电缆驱动感应电机时会发生电压反射。本文基于传输线理论分析了电压反射现象机理,认为功率电缆和感应电机的准确建模是进行电压反射抑制的关键,进而根据大功率感应电机驱动系统的特点提出了功率电缆和感应电机的高频参数测量方法。仿真和实验波形对比表明本文提出的电缆建模和电机高频建模方法在分析大功率变频驱动系统的电压反射现象时,具有较高精度,以阻抗匹配原理设计的RC滤波器对电机端口地PWM脉波电压反射具有较好地抑制效果。This paper investigated the principle of the PWM pulse wave reflection in the high power induction motor PWM（Pulse Width Modulation） driving system. In order to get the accurate high frequency parameter of the cable and motor, an impedance measuring method for PWM driving system was proposed. The result of the simulation and experiment has proved that the cable and motor high frequency modeling method applied in the voltage reflection analysis can lead to a precise result. The restraint strategy of the voltage reflection by PWM pulse also greatly depressed the over voltage in the motor end.

关 键 词：电压反射 过电压 长线传输 电机驱动 

分 类 号：TM315[电气工程—电机]