A new algorithm research and simulation for permanent magnet synchronous motor ac servo system

In this paper, the block diagram of the principles and the structure of the PMSM ac servo vector controlling system are described. The distinct features of the system are to replace electric current hysteresis controller with SVPWM. Besides, the paper introduces the principle of space voltage vector PWM (SVPWM) and the algorithm of SVPWM and also introduces the function of every module. Moreover, it introduces how to apply SVPWM algorithm into the computer to increase the efficiency of calculating ,and gives the Simulink simulation diagram of current and speed double closed loop. And it analyses the structure and realization method of inside modules of SVPWM system and offers the simulation waveforms of permanent-magnetic synchronous motor servo system