The servo energy system is divided into six main elements: servo motor, encoder, gear pump, servo drive, pressure sensor and drive control module. Among them, the driving control module is the key and core of the difference between traditional injection molding machines. Its specific working process and key techniques can be summarized as:
1. The servo driver receives the pressure (P) and flow (Q) instructions issued by the injection machine controller and converts them to the speed instruction to be transferred to the servo motor. The Servo motor drives the pump rotates, the gear pump is according to the command output pressure flow, pressure sensor information acquisition system pressure at the same time, and feedback to the servo driver, the servo motor will rotate speed information feedback to servo driver. Subsequently, the servo drives feedback the actual pressure and flow information to the injection molding machine controller. By comparing actual flow, pressure, and instruction flow and pressure, the injection molding machine controller adjusts the instruction flow and pressure in a timely way to achieve the closed-loop control.
2. The response speed of the servo system can reach 0.03 ms, much larger than the response speed of the variable pump 0.3 ms, thus significantly improving the control precision.