【作者】 乔晓利；

【导师】 张爱玲； 李岚；

【作者基本信息】 太原理工大学 ， 电机与电器， 2003， 硕士

【摘要】 在感应电动机变频调速系统中，为了实现转速的闭环控制，速度传感器是必不可少的，速度传感器的安装及其运行环境所带来的问题，往往成为系统的一种故障源，进而降低了系统的可靠性，这有悖于人们采用感应电动机的初衷。近几年来，感应电动机无速度传感器变频调速系统已成为新的研究热点和发展趋势。本文主要研究了基于数字信号处理器(DSP)TMS320F240的全数字化感应电动机无速度传感器变频调速系统的设计方法及软件实现。 本文深入研究了感应电动机矢量变换的控制理论和利用电动机转矩电流分量进行速度推算的方法。在此基础上设计了一个闭环的无速度传感器矢量控制变频调速系统。并且使这个闭环系统在MATLAB中的仿真工具箱SIMULINK中加以实现，仿真结果证明了速度推算环节的可行性，另外还证明这个控制系统具有良好的动、静态性能，并且为后来用软件实现该系统提供了依据。 全数字化无速度传感器变频调速系统实现的关键在于速度的推算模块、电压型矢量解藕模块、速度调节器模块的实现以及如何实时地得到PWM开关信号。本文主要对这四部分做了详细的分析，给出了这几个模块的设计方法和编程思想。在基于TMS32OF24O的研究开发平台上对一台2.Zkw的感应电动机进行了实验，实验结果证明该控制系统具有较强的带负载能力，较好的变频能力、较好的速度推算能力。 近几年来，为了使无速度传感器控制系统具有与有速度传感器控制系统(或直接转矩控制)相当的速度性能，出现了很多高性能的速度辨识方法。为了提高速度辨识的精度，本文在速度辨识这方面做了进一步的探索。主要是用模型参考自适应法进行了速度辨识，并在MATLAB的SIMULINK中对它进行了仿真研究，但由于时间限制，仿真结果还不完善。更多还原

【Abstract】 In the VWF system of induction motor, it is indispensable to need a speed-sensor in order to realize speed close-loop control. Some matters that are brought by speed- sensor fixed and the system running condition usually become the system’s a breakdown root and low the system’s dependable, which is in contravention of people’s original intention to use induction motor.In the last few years, the speed-sensorless VWF system ofinduation motor has become a new study hotspot and development trend .The paper primarily studied the design method and software of speed-sensorless VWF system of induction motor based on the digital signal processor (DSP) TMS320F240.The paper lucubrated the control theory of induction motor’svector transform and the method of calculating speed by induction motor’s torque current weight,based on which, the paper designed a close-loop speed-sensorless vector control VWF system and realized the system in MATLAB/SIMULINK. The simulink result proved the feasibility of speed calculation model.In addition ,it also proved that the control system has a better dynamic > static performance. The simulink provided the base for the implementation of the control system afterwards.The key of the implementation of the full digital speed-sensorless VWF system lies in how to obtain the speed calculation modeK voltage vector decoupling modeK speed adjuster model and how to obtain the PWM switch signal. The paper primarily analyzed the four-part detailed and provided the designingTand programing thought.On the research and development platform based oM digital signal processor TMS320F240, the paper made experiment of the, control system with 2.2kw induction motor. The result proved that the system has better capabilities of draging load , vary ing frequency and calculating speed.In the last few years, a lot of high performance speed identification methods have been appeared in order to obtain the same speed performance of the speed-sensorless control system as that of speed-sensor control system (or direct torque control). The paper went deep into speed identification to improve the precision of calculating speed. The paper mainly adopted to the method of model reference adaptive,and simulinked it in the MATLAB/SIMULINK, however, simulink result has not been perfected because time limited.更多还原