| More than half a century, it had made great progressed in microelectronic, powerelectronic and the manufacturing process of permanent magnet materials, the AC servosystem has been widely used in the production and lives, which executing agency is thepermanent magnet synchronous motor (PMSM), especially, in some fields which need veryhigh precision. Therefore, it is very important and decides directly the speed of industrydevelopment and the improving of people’s quality of life.In this paper, the principle of the permanent magnet AC servo system is researched. Ithave complex structure model in permanent magnet synchronous motor，In order to simplify alinear mathematical model，we must make some assumptions under ideal conditions. Therotor magnetic field oriented vector control (FOC) is the control scheme of PMSM’s AC servosystem, which has two feedback loops, current loop and velocity loop. The current loop’sregulator is a PI regulator, and the velocity loop’s regulator is a improved model referenceadaptive controller (MRAC).The control strategy of power inverter adapts space vector pulsewidth modulation (SVPWM). Based on the classical SVPWM algorithm，we present an newalgorithm which can improve the sector determination and also the active time of spacevectors. the perspective of application analysis model. Traditional methods of arithmeticchange from megillah to simpleness. By using MATLAB software，this article set up thesimulation model of this permanent magnet AC servo system structures.The results show that this permanent magnet AC servo system has a good tracking andanti-interference performance, and also proved that this system has a good speed Servoperformance. The simulation result shows that the driver designed in this paper is stable,reliable and certain practical value. |
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