基于DSP的无速度传感器矢量控制变频调速系统的研究

发布时间：2018-06-05 09:56

本文选题：异步电机 + 矢量控制　；参考：《华南理工大学》2014年硕士论文

【摘要】：无速度传感器矢量控制变频调速系统一直以来都是学术界和工程界在电机拖动领域的研究热点，本文旨在着重进行两个方面的研究：（1）基于反电动势（BEMF）的模型参考自适应（MRAS）矢量控制系统速度辨识方法的实现，通过对感应电机的等效电路进行分析，分别从定子侧和转子侧建立感应电机的反电动势方程，通过模型参考自适应的原理估算出异步电机转速（2）异步电机矢量控制系统的控制器设计，首先建立电流环和速度环的数学模型，然后，给出相应的电流控制器和速度控制器的设计方法本文首先对交流调速系统的历史和发展进行回顾和展望，，对无速度传感器矢量控制系统的转速估算方法做简要介绍第二章介绍异步电机矢量控制的基础知识和相关原理对异步电机的基本方程式，坐标变换及在不同坐标系下的数学模型加以描述介绍了矢量控制的精髓SVPWM基本原理及控制算法考虑到现代的矢量控制均为数字控制，故对数字控制基础知识作了介绍然后详细介绍了基于BEMF的MRAS矢量控制系统的电机转速辨识方法，并考虑到在离散控制系统中如何对该算法进行数字化实现，给出了Matlab/Simulink仿真结果和实验结果同时，为了克服依靠经验来进行PI参数整定的弊端，设计出异步电机矢量控制系统的自适应控制器对电流环PI控制器和速度环PI控制器的设计做了详细的介绍和推导考虑的数字控制中的时延问题对控制效果的影响，本文也详细讨论了解决的办法，并作了相应的仿真验证最后，在软件系统设计方面，给出了基于TMS320F28035为控制核心的系统软件设计架构，给出了异步电机矢量控制的主程序流程图以及相关的中断程序流程图，并对程序的实现作了详细的介绍给出了在相关的测试平台上的测试结果，对在Labview中观测的测试结果做简要的说明和分析
[Abstract]:The speed sensorless vector control variable frequency speed control system has always been the research hotspot in the field of motor drive in academic and engineering circles. This paper focuses on two aspects: 1) the realization of speed identification method of model reference adaptive control system based on BEMF, and the analysis of equivalent circuit of induction motor. The back EMF equations of induction motor are established from stator side and rotor side respectively. The controller design of vector control system for induction motor is estimated by model reference adaptive principle. First, the mathematical models of current loop and speed loop are established. Then, the design methods of current controller and speed controller are given. Firstly, the history and development of AC speed regulating system are reviewed and prospected. The speed estimation method of speed sensorless vector control system is briefly introduced in the second chapter, the basic knowledge of vector control of asynchronous motor and the basic equations of related principle to asynchronous motor are introduced. Coordinate transformation and mathematical models in different coordinate systems are described. The essence of vector control, the basic principle of SVPWM, and the control algorithm are described. The modern vector control is considered as digital control. In this paper, the basic knowledge of digital control is introduced, and then the motor speed identification method of MRAS vector control system based on BEMF is introduced in detail, and how to realize the algorithm digitally in discrete control system is considered. The simulation results and experimental results of Matlab / Simulink are given. In order to overcome the shortcoming of Pi parameter tuning based on experience, The adaptive controller of vector control system for asynchronous motor is designed. The design of current loop Pi controller and speed loop Pi controller is introduced in detail. This paper also discusses the solution in detail, and makes the corresponding simulation verification. Finally, in the aspect of software system design, the system software design architecture based on TMS320F28035 is given. The main program flow chart and related interrupt program flow chart of vector control of asynchronous motor are given, and the implementation of the program is introduced in detail, and the test results on the related test platform are given. Brief description and analysis of the test results observed in LabVIEW
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM921.51

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