摘 要
本文深入研究了基于正弦脉宽调制（SPWM）技术的交流电机调速系统建模与动态仿真。首先，详细阐述了SPWM控制原理，包括单极性和双极性SPWM方法，并对比了自然采样法与对称规则采样法两种常用的SPWM控制算法。随后，利用MATLAB/Simulink平台构建了交流电机SPWM调速系统的仿真模型，其中重点展示了自然采样法SPWM脉冲生成子系统及其与三相逆变器的集成方法。在交流电机子系统中，依据派克方程建立了α、β坐标系下的数学模型，并分别构建了电流、磁链、转矩及运动方程的Simulink仿真模型。通过对仿真参数的设置，如定子电阻、转子电阻、电感等电气参数，以及频率和负载转矩的阶跃信号输入，实现了对交流电机动态性能的仿真分析。仿真结果表明，该系统能够有效地控制交流电机的转速和电磁转矩，验证了模型的正确性和有效性。本文的研究为交流电机调速系统的设计与优化提供了理论基础和仿真支持。
关键词：SPWM（正弦脉宽调制）；交流电机调速；Simulink仿真；磁链方程；动态仿真
Abstract
This paper studies the modeling and dynamic simulation of AC motor speed regulation system based on sinusoidal pulse width modulation (SPWM) technology. First, we elaborate the SPWM control principle, including unipolar and bipolar SPWM methods, and compare two common SPWM control algorithms, natural sampling method and symmetric rule sampling method. Subsequently, the simulation model of SPWM speed regulation system of AC motor is constructed using MATLAB / Simulink platform, which focuses on the natural sampling method of SPWM pulse generation subsystem and its integration method with three-phase inverter. In the AC motor subsystem, the mathematical model of α and β coordinate system is established according to the Pike equation, and the Simulink simulation model of current, magnetic chain, torque and motion equation is constructed respectively. Through the setting of the simulation parameters, such as electrical parameters such as stator resistance, rotor resistance and inductor, and the step signal input of the frequency and load torque. The simulation results show that the system can effectively control the speed and electromagnetic torque of the AC motor, verifying the correctness and effectiveness of the model. The research in this paper provides theoretical basis and simulation support for the design and optimization of AC motor speed regulation system.
Key words: SPWM (sinusoidal pulse width modulation); AC motor speed regulation; Simulink simulation; magnetic chain equation; dynamic simulation
目录
摘 要
Abstract
绪论
1交流调速技术发展概况
1.1电力电子器件
1.2变流技术
1.3变频调速的控制方式
1.4MATLAB/Simulink仿真介绍
2逆变电路的建模与仿真
2.1绝缘栅双极型晶体管
2.2三相桥式逆变电路的基本原理
2.3正弦脉冲宽度调制（SPWM）基本原理
2.4三相SPWM逆变器的建模与仿真
3变频器的设计仿真
3.1变频器的基本概念
3.2交-直-交变频电路的建模与仿真
4交流电机SPWM调速系统建模与动态仿真
4.1 交流电机调速原理
4.1.1 SPWM控制原理
4.1.2 SPWM的控制算法
4.2 SPWM交流调速系统的Simulink建模与仿真分析
4.2.1交流电机SPWM自然采样法的Simulink仿真模型
4.2.2 SPWM脉冲生成子系统
4.2.3交流电机子系统
4.2.4 SPWM交流调速系统仿真
致 谢
参考文献
