Study On The Realization Method Of Software Design Of Vector Control System

This dissertation is based on the development of the Rb-Fe-B PMSM (Permanent Magnet Synchronous Motor) vector control system applied to the EV (the Electrical Vehicle). The vector control theory, mathematical model of PMSM, field oriented control method and SVPWM method are deduced and analyzed, and the vector control algorithm of PMSM based on TMS320LF2407 DSP are studied, then the program is built. The study of this subject is important for the development of high-performance EV driving control system and the boost up of national EV industrial competition.At first, the basic theory of vector control is described and the mathematical model of PMSM is analyzed, and the method of rotor field oriented control is analyzed.Secondly, the basic structure of EV DC-AC inverter is described, SVPWM method is analyzed, and the scheme of PMSM vector control is brought forward, and then the hardware design is described.Then, a speed-current-double-feedback simulative model of field oriented control scheme is created on computer by MATLAB/Simulink, and the parameters of PMSM vector control system are simulated while the load varying, and the scheme is proved feasible.Finally, according to the functional requirements of vector control system and characteristics of TMS320LF2407, the whole system is divided into two parts of main program and interrupted program, and divided some modules. Then designing those modules dividually and synthesizing them to finish the system. PID control algorithm, transform of coordinate system, SVPWM algorithm, measurement of the rotor position and calculation of the speed, current sample and algorithm of software filter, calculation of Sin θ...