Research and design of permanent magnetic synchronous motor drives used for hydraulic press

Aiming at permanent magnetic synchronous motor(PMSM)drives used for hydraulic press, this paper presented the design method and implementation of PMSM drives based on field oriented control(FOC) and closed-loop pressure control. There were three feedback signals — current, speed and pressure in the control system, obtained from a current sensor, a resolver and a pressure sensor. Then based on this, the three closed-loop control strategy of the pressure loop, the speed loop and the current loop was adopted. Furthermore, the design of the hardware and the software was presented in detail. The simulation and the experiments results show that the proposed control system is available, reasonable and the PMSM drives has an excellent performance.