Sensorless Control System Of Permanent Magnet Synchronous Motor Based On FPGA

As environmental issues become increasingly prominent, resources and energyconservation becoming the development direction of all walks of life. With its high efficiencyand low loss characteristics, permanent magnet synchronous motor control is the best choiceto instead of the traditional servo moving parts. However, the control system of permanentmagnet synchronous motor requires precise speed and the information of rotor location. Thetraditional solution is using of mechanical sensors to solve this problem. However, with theintroduction of mechanical sensors, it also brings a lot of new problems, such as increasingthe system inertia, reducing the accuracy of the system, complicated to install mechanicalsensors. Therefore, sensorless control system has become the focus of research in the field ofcontroling.Becasue of the large computation of Extended Kalman filter algorithm, the traditionalsystem can not meet the real-time controlling by tradational MCU. In this paper, verilog-HDLis used as the programming language for completed the research FPGA-based sensorlesspermanent magnet synchronous motor control system. Altera’s Cyclone II series chip,EP2C8Q208C8, is used as the controller core of the system designed in the paper. Due to theadvantages of high-speed data processing of FPGA, it is better satisfied the system demand inreal-time. While achieving the functionality of the integrated controller, including coordinatetransformation, PI regulator, inverter control, speed estimation and other functions. This paperintroduced the theory of permanent magnet synchronous motor control system, and analyzedthe extended Kalman filter algorithm principle and working process in permanent magnetsynchronous motor, and finished the establishment of extended Kalman filter algorithm basedon permanent magnet synchronous motor control system model. And it also described indetail the implementation of sensorless control system on an FPGA. When introduced themethod of implementation, it gave the simulation analysises for each part. Through theanalysis of the simulation results at the same time, proves that the system is good, the rotorspeed estimation for high precision and meet the requirements of control systems.With the rapid development of electronic and semiconductor technology, digital andfunctional integration is becoming the development trend of the control system. This studyhas some reference value for the development of permanent magnet synchronous motorcontrol system for the application of the sensorless permanent magnet synchronous motor.Italso provides a solution for the sensorless permanent magnet synchronous motor.