Research On Permanent-Magnet Synchronous Motor AC Servo System

Permanent magnet synchronous motors (PMSM) have shown increasing popularity for high performance servo systems due to the recent developments of magnetic materials, power converters and digital signal processors. PMSM have the characters of high running efficiency, great power density, low inertia, high reliability, etc. It does not need an external power supply to excite the rotor field and hence the field winding and slip rings are eliminated.This thesis sets up the mathematical model of the permanent magnet synchronous motor in SIMULINK. Current hysteresis band PWM, SPWM and space vector PWM have been analyzed. It sets up vector control model in SIMULINK. It realizes the control by two different ways, hysteresis and SPWM. The model works well when the giving torque changes.On the base of principle and simulation analysis, the thesis particularly presents the designing and realizing methods on the whole servo system's hardware and software. The control scheme is implemented using a high speed DSP, TMS320LF2407A and a CPLD EPM3128ATC100-10. The software is implemented by assembly language. Furthermore the experiment results for the full-digital servo system presented. These waves and data indicate the speed servo systems which are designed in this thesis have satisfying dynamic and static performance.