تحقیق بر روی شبیه سازی سیستم کنترل موتور سنکرون خطی مغناطیسی دائمی

Based on the analysis of mathematical models of PMLSM and theories of vector control, it puts forward control system modeling method, two control loops which are the inner current-loop and the outer speed-loop are used in Matlab/Simulink, permanent magnet linear synchronous motors mathematical model is also modeled by end effect and three phase asymmetric winding. The simulation results proved the affectivity of the system's model and verified its control calculation way, and it also provided sufficient theoretical basis for designing and adjusting in practical control system.

The permanent magnet synchronous linear motor that is a new feed transmission, and it does not use mechanical transmissions. The permanent magnet synchronous linear motor was more and more used in factory automation and numerical control systems because they can be operated without indirect coupling mechanisms, such as gear boxes, chains and screw coupling, allowing high precision control to be achieved. It is a trance that linear motors are widely used in high performance CNC machine tools [1]. The vector control system of permanent magnet synchronous linear motor doesn t have the advantage of high precision control and high dynamic performance, but also can change speed more conveniently, as a result, the system attract more and more scholars to pay attention home and abroad [2]. The experiment has built the model of vector control system of PMSLM based on the environment of MATLAB software, which can provide the design and work of actual system with a new measure.

For AC servo control system, Rapidity, Accuracy and Stability are the main performance indexes to estimate whether it is efficient. The simulation result shows, when a speed command is given, the permanent magnet linear synchronous motors (PMLSM) can attain the given speed by adjusting the speed loop and current loop and the Rate response curves in time domain is more ideal. The speed loop simulation system can run smoothly and features excellent dynamic and static performances. The experiment fully illustrated and proved the correctness of PMLSM mathematical model and the feasibility of this control algorithm and it offered the thinking for the further designing and adjusting of direct drive system.