斩波串级调速系统机械特性的分析  

Analysis for Mechanical Characters of Chopped Wave Cascade Speed Control System

作　　者：张军伟[1,2] 王兵树[1] 万军[1] 张晓东[1] 

机构地区：[1]华北电力大学控制科学与工程学院,河北保定071003 [2]华北保定电力职业技术学院,河北保定071056

出　　处：《电机与控制应用》2010年第1期25-30,共6页Electric machines & control application

基　　金：科技型中小企业技术创新基金(06c26211300065)

摘　　要：高频斩波串级调速系统在高压大功率风机、水泵的节能改造中具有广阔的发展前景。目前,该系统已在国内的许多工业现场得到了广泛应用,但由于其有别于传统移相触发的控制方式,系统主回路结构和内在特性发生了变化,所以有必要对其机械特性进行深入分析。介绍了高频斩波串级调速系统的工作原理,分析了系统主回路的稳态输入、输出关系,推导了系统在一、二两个有效工作区的机械特性方程,并以此为依据绘制了不同占空比下斩波串级调速系统的机械特性曲线。The hign-frequency chopped wave cascade speed control system has an overt advantage on the energy saving and improvement of high voltage, huge power fan blower and water pump. As a result, it was widely used at lots of technical locale in China. However,for the different control mode with traditional phase shifting burst mode, some changes have taken place on the main circuit and inner characteristic. So, It was very necessary to analyse the mechanical characteristic of system. The radical theory about chopped wave control system was introduced and the relation between input and output of the main circuit in stable state was furtherly analysed. The equations about mechanical characters including two available work district of system were put forward. At last, according to the above conclusions, the curve about the mechanical characters of chopped wave cascade speed control system was painted.

关 键 词：斩波串级调速 占空比 机械特性 

分 类 号：TM921.53[电气工程—电力电子与电力传动]