基于离散空间矢量调制的三电平逆变器异步电机直接转矩控制方法  

A DTC Algorithm for Induction Motors Fed by Three-level NPC Inverter

作　　者：王展[1] 邹云屏[1] 林磊[1] 金红元[1] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北武汉430074

出　　处：《电机电器技术》2005年第4期46-48,共3页

摘　　要：二极管钳位型三电平逆变器广泛的应用于电力拖动领域。本文提出了一种基于离散空间矢量调制(DSVM)的三电平异步电机直接转矩控制(DTC)方法。这种方法在保持直接转矩控制(DTC)方法优点的前提下,保持开关频率恒定,并没有增加输出电压的dv／dt和开关损耗。仿真结果表明了这种控制方法的有效性。Three-level neutral point clamped （NPC） inverter is widely applied in electrical towage fields. Much more voltage vectors can be used in three-level inverter than in two-level inverter. In this paper, based on the application of the discrete space vector modulation （DSVM）, a DTC strategy fed by three-level inverters for induction motors is proposed. With DSVM-DTC strategy, high dv/dt of output voltage is restrained. At the same time, it does not deteriorate good dynamic performance of basic DTC schemes, and keeps switch frequency constant, but does not increase switching loss. The simulation results verify the correctness and feasibility of the proposed control scheme.

关 键 词：三电平逆变器 异步电机 离散空间矢量调制 直接转矩控制 

分 类 号：TM383.6[电气工程—电机]