Research And Realization Of Vector Control Strategy For Asynchronous Motor Based On Dspace

With the diversification and rapidity of the market demand for product development and increasingly high reliability and robustness that control systems are required to be, the study of traditional pure digital off-line simulation can not meet the requirements of high performance systems, making the real-time simulation put on the agenda, and that dSPACE real-time simulation platform can provide good solutions for the above problems; vector control technique based on rotor field-oriented with its superior performance has been widely used in traction drive control field for urban rail traffic. Based on the above-mentioned situation, on sponsored by national science and technology support project for urban rail transit, the research work of this thesis mainly focuses on the scheme design and implementation of vector control for asynchronous motor based on the dSPACE real-time simulation platform.Aimed at the dSPACE R&D platform used in this thesis, firstly, it’s explained as a whole; then, the hardware architecture resources and software development environment of dSPACE platform are illustrated, and the specific implementation process of dSPACE applied in practical project development is expounded.Vector control technique for asynchronous motor based on indirect field-oriented in this thesis is researched. Firstly, the implementation principle of indirect vector control based on rotor field orientation is discussed in detail on the basis of mathematical model of asynchronous motor, and concentrates on the design method of key links such as voltage decoupling unit, vector regulators, etc. Secondly, the technique scheme of vector control is illustrated minutely. Finally, the vector control strategy is validated by off-line simulation based on Simulink.Real-time simulation system for vector control based on dSPACE semi-physical simulation platform is constructed, the converter main circuit, signal detection and dSPACE system interface circuits of real-time simulation system are designed, on the basis of which the design process of real-time simulation model for vector control based on dSPACE is given a detailed explanation.Joint debugging experiments of vector control for asynchronous motor are conducted based on the constructed dSPACE real-time simulation platform. Firstly, with the help of comprehensive experimental and debugging software ControlDesk, a monitoring interface used for controlling experiment process is created. Then, the debugging process of vector control for asynchronous motor experiments is given with the aid of the monitoring interface. Finally, the vector control experiments based dSPACE semi-physical simulation platform are carried out with asynchronous motor under no load/load conditions.The experimental results commendably verify the vector control strategy for asynchronous motor researched by this thesis and are consistent with the off-line simulation results of vector control for asynchronous motor based on Simulink, and further validate the validity and practicality of vector control for asynchronous motor based on the dSPACE semi-physical simulation platform. Moreover, the actual system development and experiment process confirms that the dSPACE real-time simulation platform can effectively shorten the development time of the project and greatly facilitate the development process of the project, and save the project’s cost to a large extent during the design and test period.