1. Use servo motor to directly drive the main oil pump of hydraulic press to achieve energy saving.
At present, there are still many difficulties in directly driving hydraulic pump with high-power servo motor, mainly requiring the speed range of hydraulic pump to be very large. The minimum speed of general hydraulic pump is 600 r/min, and the hydraulic pump can work normally even below 10r/min.
High-power AC servo motor and its control technology The emergence of high-power AC servo motor is a new product produced in the past 10 years. At present, the technology mainly uses switched reluctance motor (SMR), which has the advantages of simplicity and reliability, high efficiency in a wide range of speed and torque, four-quadrant operation, fast response speed and low cost. Its disadvantages are: large fluctuations in torque and large vibration; the system has nonlinear characteristics, high control cost and low power density.
The AC servo motor drive control unit consists of large-scale integrated circuits, high-power rectifier modules and other electronic power components. With the development of electronic technology, the performance of high-power AC servo motor drive control unit has been continuously improved, and the price has been continuously reduced, which has promoted the realization and promotion of high-power AC servo drive technology and provided the possibility for the use of AC servo drive in the field of forging equipment. The research focus is to concentrate scientific research forces to develop high-power AC servo motor control technology and related application technologies with independent intellectual property rights, providing a solid foundation for the development of servo hydraulic presses.
