切换型异步电动机双馈调速系统  

Switched Doubly Fed Induction Motor Drive System

作　　者：马小亮[1] 

机构地区：[1]天津电气科学研究院有限公司(原名--天津电气传动设计研究所),天津300180

出　　处：《电气传动》2016年第1期10-14,共5页Electric Drive

摘　　要：常规双馈调速系统(DFM)用接于转子侧的小功率低电压变频器调节大功率高电压绕线异步电动机转速,但调速范围窄。介绍的切换型双馈调速系统(SDFM)保留了DFM所有优点,且可扩宽调速范围,实现零至最高速的恒转矩调速。它把整个调速范围分成高速和低速两段,高速段定子接电网,按DFM工作,低速段定子离网,改接直流励磁电源或三相短接,电机变成一台定、转子功能互换的同步电动机或异步电动机。由于技术相近,已掌握双馈风力发电技术的企业开发该系统很容易。Traditional doubly fed induction motor drive(DFM)can adjust high power and high voltage induction motor speed by means of a low power and low voltage converter connected with rotor,but its speed range is narrow. The introduced switched doubly fed induction motor drive(SDFM)not only has all advantages of the DEM,but also can extend speed range and adjust speed from zero to maximum with constant torque. In SDFM whole speed range is divided into high speed and low speed two sections. In high speed section stator is connected to grid and the machine works as DFM. In low speed section stator is disconnected from grid and it is connected to a DC excitation souse or short circuited,the motor works as a synchronous motor or asynchronous motor which stator and rotor functions are reversed. It is easy to develop the SDFM system for those businesses who have known doubly fed wind generator well.

关 键 词：切换型双馈调速系统 宽调速范围 恒转矩 直流励磁 定子短接 

分 类 号：TM343[电气工程—电机]