FPGA-based AC Servo System

Because of the development of microprocessor technology, power electronics, motor manufacturing technology and modern control theory, the application of AC servo system has replaced DC servo system ,used more and more widely.PMSM are increasingly being used in AC servo system because of its superior performance. At the same time as the development of semiconductor technology, the production process of FPGA promotion rapidly, density and performance are improved too. On this basis, this article give up the traditional DSP program, use FPGA as the vector control platform of PMSM, design the vector control system based FPGA.In this paper,the mathematical model of permanent magnet synchronous motor are analysised, the basic principles of vector control are introduced, and control system is modular divised,then the system model is structured.The whole system is divided into modules Clarke transform module and Clarke inverse transform module, Park transform module and the Park inverse transform module,PI control module,SPWM module,current detection module and encoder interface module.In this paper, the hardware design method of PMSM's control system is introduced, which focuses on the configuration method of the FPGA chip;and software programming of the system's each module is completed used the hardware programming language VHDL, the simulation of the fourth chapter prove the correctness of its results.Based on the design platform of the hardware,the system is realized by hardware and verification, experimental waveforms of the system open-loop and closed-loop experiments are given in Chapter V,and results of experimental are analysised. The feasibility is proved that we can single-chip FPGA realize AC motor control system.