无刷直流电动机的驱动与MATLAB仿真毕业设计.docx

摘要无刷直流电动机的最本质特征就是没有机械换向结构，取而代之的是逻辑电路和功率开关线路共同组成的电子换相器，它把直流电逆变成交流电并按一定的次序通入电动机的定子绕组中以产生与定子磁场正交的转子磁场。在使用中无刷直流电机相比有刷电机有许多的优点，比如：能获得更好的扭矩转速特；性高速动态响应；高效率；长寿命；低噪声；高转速。本文主要研究了无刷直流电机调速系统的基本方法，主要内容有无刷直流电机的基本原理，脉宽调速系统的原理和控制方法，在此基础上重点研究了无刷直流电机的换相控制，并对无刷直流电动机调速系统进行设计。最后利用MATLAB\Simulink——面向电气原理结构图的仿真技术，设计了一个转速单闭环无刷直流电机可逆脉宽调速系统，对其进行仿真，并根据仿真结果分析研究无刷直流电动机。关键词：调速，PWM控制，无刷直流电动机，仿真AbstractHaving no mechanical converter is Brushless DC motor essential feature.The structure is to replacedby a logic and power switching circuit composed of electronic commutator, which invert the direct current into alternating current according to certain reverse the order of access motor stator windings in order to generate the rotor magnetic field orthogonal to the stator magnetic field. Compared to traditional DC motor, Brushless DC motor has many advantages, such as: access to better torque speed characteristics; of high-speed dynamic response; high efficiency; long life; low noise; high speed. This paper mainly studies the basic method of brushless DC motor speed control system, the main contents of this paper are including the basic principles of Brushless DC motor, PWM Speed Control System and the control method, and brushless DC motor speed control system design. Finally, MATLAB \ Simulink - Electric-principle-orientedfor the simulation technology is used in design a single closed loop brushless DC motor speed reversible PWM speed control system, then simulate the system, and analysethe simulation results in order to research the feature of BLDCM.Key words:speed regulation,PWM control, BLDC motor,simulation目 录第一章引言1.1无刷直流电机发展简介………………………………………………………..41.2无刷直流电机调速系统的研究现状和未来发展………….………………….51.3 本设计的主要内容……………………………………………………………..5第二章无刷直流电机原理2.1 无刷直流电机的概述…………………………………………………………...72.2 电动机本体……………………………………………………………………...82.2.1定子…………………………………………………………………………92.2.2转子…………………………………………………………………………92.2.3有关电机本体设计的问题………………………………………………..102.3转子位置检测……………………………………………………………...…..102.3.1 位置传感器法………………………………………………….………….