Study on Repetitive Controller for the Position Servo System of Electrical Injection Molding Machine

This paper proposes a novel approach for AC servo system control of electrical injection molding machine. Based on the Permanent-Magnet Synchronous Motor(PMSM) vector control, position servo system is achieved using repetitive control(RC), and then the controller is designed in order to tracking the periodic reference. Not only the principle and arithmetic of RC are detailed, but also the mathematic model of PMSM and the design process are included in this paper. At last, the simulation is presented for the given periodic reference of position. And the effectiveness, briefness, and feasibility of the proposed approach are demonstrated by the results of simulation.