Traditional hydraulic presses use variable displacement pumps   The servo hydraulic press uses a servo motor to drive the gear pump.  Servo hydraulic machine advantages: high efficiency, energy saving, noise reduction, and improve equipment accuracy.     Energy-saving features of servo hydraulic press:           1. High energy saving Compared with the traditional fixed displacement pump and variable pump system, the servo system adopts pressure and flow double closed-loop control, and the energy saving rate can reach 20% -80%. Compared with the vector frequency conversion system (self-proclaimed asynchronous servo system), the energy saving is more than 20%. The servo system uses a permanent magnet synchronous servo motor. The efficiency of the motor itself is as high as 95%, while the efficiency of the asynchronous motor is only about 75%.            2. High efficiency The servo response speed is fast, the pressure rise time and flow rise time are as fast as 20ms, which is nearly 50 times faster than the asynchronous motor. It improves the response speed of the hydraulic system, reduces the action conversion time, and speeds up the whole machine. Adopt phase-change field weakening control technology to increase the motor speed up to 2500RPM and increase the output of the oil pump, thereby increasing the speed of operations such as opening and closing the mold.           3. High-precision and fast response speed guarantees the accuracy of opening and closing, closed-loop speed control ensures high repeatability of the position of the shooting table, the accuracy of the products produced, and good consistency; it overcomes the ordinary asynchronous motor quantitative pump system due to the grid voltage The change in speed caused by changes in frequency, frequency, etc., in turn causes the flow rate to change, which reduces the product yield.       Summary of advantages of servo hydraulic press: High speed, high efficiency, high precision, high flexibility, low noise, intelligence, energy saving and environmental protection, convenient maintenance.