The Design And Research Of PMSM Vector Control System Based On FPGA

Along with the rapid development of power electronic technology, control technology and computer technology, Motor control gets more and more attention based on the FPGA. PMSM mathematical model and strategy was described in the paper, the simulation model was built, and the PMSM control IC was developed based on the VHDL language, the hardware platform and its experimental were built and verified.In the article, the vector control scheme about the PMSM was presented by using the motor mathematical model and the SVPWM modulation technology, the FPGA development process was introduced by the combined with VHDL language and the principle diagram and the "top-down" design methods, completed the PMSM control chip based on the FPGA. In the control IC, the design and validation method of the current sampling IP core, rotational speed, location, sampling IP core, vector transform IP core, SVPWM IP core and PI controller IP core are descripted. And then, the design of hardware of control system is descripted, the system hardware circuit mainly includes the inverter circuit and the FPGA as the control circuit and detection circuit. In the main circuit, the rectifier circuit and inverter circuit and protection circuit design, the control circuit of main introduction of the minimum FPGA system design, including circuit, clocking circuit and reset circuit are introduced.The CORDIC algorithm is proposed in this paper, by this method to implement digital hardware circuit design is easy, In this paper, the approximate transfer function of the whole system is given, the design of the current PI regulator and speed regulator and their integral proportion parameter are calculated. IPM dead band time Settings, each IP core, clock distribution, data format and format conversion between system standard MAO has made the detailed introduction. Through software comes with simulation tools and a third party at the same time simulation tools ModilSim first for each IP core has carried on the function simulation and timing simulation. Then through the logic analyzer to observe in the program downloaded to the chip data and waveform, real-time digital hardware circuit design is proved to be correct.Finally, through constructing control system platform, respectively from the open loop control, current closed-loop control, double closed-loop,position loop control of the experimental data and waveform are given, the validation step by step, realize the design of the PMSM vector control system, which laid a foundation for subsequent system improvement work.