摘  要

永磁同步电机因为其运行的可靠性高，结构简单，所以在交流伺服电机中所处的地位越来越高。而另一方面，直接转矩控制是近年来应用比较广泛的一种控制策略。它的优点包括控制原理直观明了，操作简单快捷，具有良好的转矩响应性。基于这一发展趋势，本文重点研究了把直接转矩控制应用在永磁同步电机上的控制效果。从永磁同步电动机PMSM的结构及其特点，分析了其优越性，并建立数学模型，根据空间矢量坐标关系推导出PMSM的在各坐标系下DTC的原理。本章分析了定子磁链与电磁转矩的估算和滞环控制，通过其原理研究了开关表控制的方式，并对PMSM的直接转矩控制DTC的Matlab/Simulink仿真，最终得出了DTC较其它控制方式的稳定性。

关键词：永磁同步电机；直接转矩控制；PMSM

Abstract

Permanent magnet synchronous motor (PMSM) is playing a more and more important role in AC servo motor because of its high reliability and simple structure. On the other hand, Direct torque control (DTC) is a widely used control strategy in recent years. Its advantages include intuitionistic control principle, simple and fast operation and good torque response. This paper focuses on the control effect of direct torque control (DTC) applied to permanent magnet synchronous motor (PMSM). From the structure and characteristics of PMSM PMSM, the superiority of DTC is analyzed, and the mathematical model is established. According to the space vector coordinate relation, the PMSM's In this chapter, the estimation of stator flux and electromagnetic torque and hysteresis control are analyzed. Through its principle, the mode of switching table control is studied, and the Matlab/Simulink simulation of PMSM direct torque control DTC is given. Finally, the stability of DTC compared with other control methods is obtained.

Keywords: permanent magnet synchronous motor; direct torque control; PMSM