Research And Realization Of Permanent Magnet Synchronous Motor Servo System Based On DSP

With the rapid development of science and technology, especially in the progress of motor manufacturing technology, modern power electronics techniques and advanced control theories, the AC servo control systems have been paid more and more attention. Digital controlled AC servo systems will be the trend, which uses Permanent Magnet Synchronous Motors (PMSM) as power units and high quality control strategy.The PMSM model is a coupling, time-varying and nonlinear system. The Vector Control method was proposed to decouple PMSM model, thus the speed regulation system with good performance could be built. In order to realize the precise position control, the fuzzy adaptive PI control was proposed for position servo system in the thesis.Firstly, the general development of PMSM servo system was introduced in the thesis. Then the motor structure, mathematic model, operation principle of PMSM and the basic theory of Vector Control for PMSM were illuminated. And the theory of fuzzy adaption and position servo system based on fuzzy adaptive PI control were analyzed. The position servo system was simulated in Matlab/ Simulink, and based on it the entire PMSM servo system model was established too. Simulation results proved the accuracy of the overall system design.After principle analysis and simulation, the design and realization methods of the whole servo system's hardware and software were presented in this thesis. The hardware was based on DSP TMS320F2812, and the software was designed with CCS2.0. The Vector Control system and position servo system for PMSM was realized. The phase current curves, speed curves, and location curves had been observed in the experiment. These experimental waves indicate that the designed servo system in the thesis has strong robustness, better speed performance and high positioning accuracy, which can basically meet the requirements of high-quality servo systems.