PWM逆变器输出对异步电动机的不利影响及其抑制分析  

Restrain Analysis and Adverse Effect of PWM Inverter Output to Asynchronous Eleetromotor

作　　者：翁利民[1] 刘琨[2] 靳建峰[3] 

机构地区：[1]中冶南方工程技术有限公司,430080 [2]武汉大学,430072 [3]郑州电力高等专科学校,450004

出　　处：《电机技术》2006年第2期10-13,共4页Electrical Machinery Technology

摘　　要：文章通过分析,揭示了PWM逆变器驱动的异步电机调速系统时的三个主要的不利影响,即PWM逆变器输出产生的异步电动机端部绕组过电压、谐波电流、以及共模电压。并结合过电压、谐波电流、以及共模电压的特点与产生的机理,分析了仿真研究所需的电缆与异步电动机的数学模型建立的思路与方法,并阐述了不同结构和安置地点的滤波器的设计思想,指出滤波器设计时,应综合考虑的几个重要因素。The main three adverse effects of PWM inverter output to asynchronous motors, i.e. over voltage, harmonic current and common-mode voltage of the end winding of the motor produced by PWM inverter speedregulation system, are described. How to establish the mathematic model necessary in the simulation between cable and motor is studied as well as the theory of the formation of over voltage, harmonic current and common mode voltage. Thus, comes the design idea that different constructions of the filters are used and different position ate distributed in the system. Furthermore, several key factors are stressed in course of designing.

关 键 词：PWM逆变器 机端过电压 共模电压 滤波器 

分 类 号：TM464[电气工程—电器] TM343