Servo motor in oil-electric injection molding machine application
Rubber and plastics machinery is China's key equipment manufacturing industry. Injection molding machines are the main production equipment, but injection molding machines are one of the main power-consuming equipments in industrial production. In order to accelerate the industrial green development, build a resource-saving and environment-friendly industrial system, and promote industrial transformation and upgrading, the “Industrial Energy Conservation and Green Development Special Action Implementation Plan 2014” formulated by the Ministry of Industry and Information Technology proposes to continue to implement motor energy efficiency improvement. plan. Therefore, the use of high-efficiency AC permanent magnet servo motor has obvious benefits such as power saving and environmental protection. Nowadays, although many brands have successively introduced the oil-electric servo system, it does not mean that the fuel-electric servo technology has reached a perfect level.
GIE servo energy-saving system adopts self-developed HSD series servo drive and GSF series high-efficiency rare-earth permanent magnet servo motor as the control system of the control core, applying the most advanced voltage space vector algorithm and current and speed double closed-loop PID control algorithm to pump the pump pressure and The combination of motor speed control can intelligently adjust the speed and torque output of the motor according to the pressure flow signal of the computer and the feedback signal of the pressure sensor, truly balance the supply and demand of power, effectively solve the energy consumption of high-pressure throttling, and realize the oil and electricity. The perfect combination of servo system and hydraulic machinery. It can be widely used in hydraulic machinery such as injection molding machines for the purpose of high efficiency, high precision and high energy saving.
The drive receives pressure and flow commands from the host computer to form a full-closed control mode of pressure and flow. The motor converts the current into torque and transmits the torque to the load; the load acts or accelerates and decelerates according to its own characteristics. The resolver measures the position of the motor (note: the resolver does not directly reflect the position of the load, only the position of the motor shaft is fed back), and the signal is fed back to the driver; the error of the given and feedback is input to the drive through a series of operations. The motor current is output and the process is repeated until the error is zero.
The main characteristics of the hydraulic servo system are:
1. Fast response: Synchronous servo runs from 0 to 100% less than 50ms.
2. Strong overload capability: the maximum allowable overload capability of the three-phase asynchronous motor is 2 times, and the synchronous servo overload capability can reach 3 times.
3. Safety: Built-in motor protection and system pressure detection and other protection functions provide underlying protection for the hydraulic system.
4, the environment is tolerant: high ambient temperature design, powerful cooling fan, suitable for high temperature environment.
