| Along with the fast development of power electronics,micro-computers, rare-earth permanent magnetic materials and control theory, permanent magnet synchronous motor(PMSM)has been widely applied in motion control system of medium or low capacity. PMSM has become the developing direction of servo drive in servo driving field, and gradually takes the place of DC motor and stepping motor. Therefore, to study the full-digital permanent magnetic synchronous control system with permanent magnetic synchronous motor as executive motor, DSP as core component has a particularly important practical significance.The mathematical model of the permanent magnet synchronous motor is built firstly in this dissertation, the theory of vector control on permanent magnet synchronous motor is studied further deeply. Four current control methods of PMSM vector control are discussed in detail, it suggests that control of id = 0 and current regulator structure at rotating coordinate can be chosen. And then analyzes the current decoupling of the main factors. Finally based on the theory of sliding mode variable structure, This paper designs a speed regulator for vector control system of permanent magnet synchronous motor (PMSM). That regulator is composed of a variable structure controller (VSC) and PI regulator. So the high frequency quiver of VSC near the original point of the sliding mode linear is overcome and the steady accuracy is improved. Based on Matlab, a simulation model of the vector control system of the permament synchronous motor is built, Furthermore, a lot of simulation researches have been done based on these models. At the same time, the thesis introduces hardware and software design of control system which is based on TMS320F2812. Their structure and function are described in detail. The simulation and the experiment results show that the servo control system designed in this thesis has satisfying static and dynamic performance, good accuracy, can meet the needs of servo control.
|
PDF Full Text Request