| In recent years, low carbon economy in the world have been considerable attention and concern, it also promote the energy-saving technology progress, to reduce the unit value of energy consumption per unit product and gradually improve energy efficiency, promote the national economy to energy conservation and environmental protection high economic mode transformation. Currently the injection machines in high efficiency, energy-saving, precision molding, the ultra precision molding, low noise and high automation development direction, hydraulic servo pump injection as a set of hydraulic injection efficiency and precision of the model, and the motor machinery industry gradually become a new direction of development.It firstly introduces the development course, summarizes the status and trend of injection molding machine process of servo control system requirements, the pump is analyzed, and the principle of pump control servo hydraulic oil system in detail. In traditional hydraulic injection machine, based on the characteristics of hydraulic servo pump, the whole structure principles through the study of the mechanical process analysis and motion, Combined with hydraulic servo pump injection process requirement, select the radial servo drive pump as its part. From the control performance and now electronics, control technology development, with a permanent magnet synchronous motor servo motor servo pump injection, through the establishment of mathematical model, the control method, research in direct torque control (DTC) is considering changing rotor flux stator flux directional orientation, through the torque deviation and the stator flux deviation to determine the voltage vector, reduce the complexity of coordinate transformation, on-line calculation are small, real-time stronger.Through toolbox of MATLAB/Simulink servo motor servo pump injection of mathematical model for simulation, flux, each phase voltage and torque, such response curve of the servo loop control precision injection corresponding requirements.This research work for further research of hydraulic servo control injection pump has important significance, servo control system is the saving fuel injection, the key link of the energy consumption can reduce the production. The control method to improve the accuracy and the controller to improve the control performance and reliability of injection has better security, hydraulic servo system for the development of injection pumps provide strong technical support. |
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