变频调速与电动机拖动控制  

Converter-governor and Pulling Control of Motor

作　　者：何明中[1] 李淑娥[1] 吕峰[1] 

机构地区：[1]河北师范大学职业技术学院,河北石家庄050031

出　　处：《河北科技大学学报》2002年第3期56-58,71,共4页Journal of Hebei University of Science and Technology

摘　　要：变频器与异步电动机相配合 ,使交流传动系统具备了调速范围宽、稳速精度高、动态响应快以及运行可靠性高的特点及良好的技术性能 ,因此 ,变频调速是异步电动机理想的调速方法。变频调速根据其不同的负载性质 ,采用的控制方法也不同 ,通常分为恒磁通调速和恒功率调速。文章针对异步电动机变频调速的方法及对应机械特性进行理论分析 ,并讨论了在电力拖动中的起动。By means of coordination of frequency converter and asynchronous motor,the AC driving system is provided with good technical performance,wide in speed conversion range,high in steady speed precision,fast in dynamic response and reliable in operation.Therefore,converter governor is the ideal way for speed control of the asynchronous motor.Converter governor,in accordance with various loading natures,employs different control means.It is usually divided into constant magnetic flux governing and constant power governing.This paper theoretically analyzes the converter governor method of asynchronous motor and the corresponding mechanical properties.It also discusses the starting,speed acceleration and braking in electrical pulling.

关 键 词：拖动控制 变频调速 电力拖动 异步电动机 机械特性 变频器 交流传动系统 

分 类 号：TM921.51[电气工程—电力电子与电力传动]