摘要:无速度传感器矢量控制系统不仅省去了速度传感器，减小了系统装置的体积，降低了成本，而且提高了系统的运行精度和可靠性，具有较强的实用价值和经济效益。目前已有很多学者从事这方面的研究，并在仿真研究方面取得了一些成果，为实际应用奠定坚实的基础。76134

    本文以永磁同步电动机(Permanent MagnetSynchronousMotor，PMSM)为研究对象，设计了基于模型参考自适应法(Model Reference Adaptive System，MRAS)的永磁同步电机无速度传感器矢量控制系统。文中首先介绍了永磁同步电机的数学模型，阐述了永磁同步电机转子磁场定向矢量控制和电压空问矢量脉宽调制(Space Vector Pulse Width Modulation，SVPWM)的基本原理，分析了MRAS算法的基本原理，推导了基于MRAS的永磁同步电机转子速度和位置估算的算法。在Matlab／Simulink仿真平台上搭建了系统的仿真模型，对电机在启动、转速变化、负载转矩变化的情况下做了仿真实验和结果分析，并与传统的有速度传感器矢量控制系统做了比较。仿真结果表明，本文所研究的基于MRAS的无速度传感器矢量控制系统具有良好的控制性能，MRAS算法可以较准确地估算永磁同步电机转子的速度和位置。

毕业论文关键词：永磁同步电机；无速度传感器；MRAS；矢量控制

Research on Simulation of Speed Sensoless Permanent Magnet Synchronous Motor Based on

Abstract: The speed sensorless vector control system not only eliminates the speed sensor, reduces the volume of the system device,Reduce the cost, but also improve the system's operating accuracy and reliability, with strong practical value and economic benefits。 At present, many scholars have engaged in this research, and in the simulation research has made some achievements for the practical application of lay a solid foundation。

    In this paper, Permanent Magnet Synchronous Motor (PMSM) is used as the research object, and a permanent magnet synchronous motor speed sensorless vector control system based on Model Reference Adaptive System (MRAS) is designed。 In this paper, the mathematical model of permanent magnet synchronous motor (PMSM) is introduced。 The basic principle of space vector vector control and magnetic space vector width modulation (SVPWM) of permanent magnet synchronous motor is described。 The basic principle of MRAS algorithm is analyzed。 The algorithm of rotor speed and position estimation of permanent magnet synchronous motor based on MRAS is deduced。 The simulation model of the system is established on the Matlab / Simulink simulation platform。 The simulation experiment and the result are analyzed in the case of starting, changing speed and load torque, and compared with the traditional velocity sensor vector control system The The simulation results show that the MRAS-based sensorless vector control system has good control performance。 The MRAS algorithm can estimate the speed and position of the permanent magnet synchronous motor rotor accurately。

Key words: permanent magnet synchronous motor; speed sensorless; MRAS; vector control

目录

第1章   绪论 1

1。1 研究背景 1

1。2 研究意义 1

1。3 国内外研究现状 2

1。4 本文的主要研究内容 4

第2章 永磁同步电机数学模型建立与分析 5

2。1 永磁同步电动机坐标变换 5

2。1。1 Clark变换 5

2。1。2 Park变换 7

2。2 PMSM数学模型