无位置传感器的永磁同步电机直接转矩控制系统  

A position sensorless motion control system of permanent magnet synchronous motor with direct torque control

作　　者：李先祥[1] 罗中良[1] 徐小增[1] 肖红军[2] 

机构地区：[1]佛山科学技术学院机电与信息工程学院,广东佛山528000 [2]华南理工大学自动化科学与工程学院,广东广州510640

出　　处：《兰州大学学报（自然科学版）》2005年第4期77-81,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：广东省自然科学基金资助项目(020118).

摘　　要：介绍了永磁同步电机直接转矩控制原理,在旋转坐标系下推导出转矩的几种表达形式,以此为基础分别对隐极式电机和凸极式同步电机提出了基于定子磁链和转矩的功率角位置估算算法.该估算法先计算电磁转矩、定子磁链及其位置,根据定子磁链和电磁转矩估算功率角,再根据功率角和定子磁链位置得到转子位置.仿真表明,本文提出的功率角估计算法简单有效,能比较精确地逼近电机实际位置,系统有良好的动静态性能.This paper presents the principle of direct torque control for permanent magnet synchronous motor, After several torque expression is attained based on rotational coordinate, the position is estimated by power-angle estimated algorithm based on stator flux-linkage and torque for interior motor and surface motor. The estimated algorithm first calculates the electromagnetic torque, flux-linkage and position of the stator, estimates the power-angle by using flux-linkage and electromagnetic torque of the stator, then estimates the position of rotor by using position of power-angle and stator flux-linkage. Simulation results show that power-angle estimated algorithm is effective and simple, the estimated position is exact-close to the real position of rotor, the system has a compact structure and good dynamic and steady performances.

关 键 词：无位置传感器 直接转矩控制 永磁同步电机 

分 类 号：TM921[电气工程—电力电子与电力传动]