Exploring the Essence of Servo Pump Control

The electrohydraulic servo variable speed volume pump control system (hereinafter referred to as ESPCS) is integrated with a permanent magnet synchronous motor motor), fixed-displacement pump, and hydraulic cylinder. By controlling the speed, output flow of can be controlled, displacement, force, Compared traditional electro-hydraulic valve system, ESPCS has advantages high power-to-weight ratio, energy saving, environmental friendliness. However, due extremely nonlinear ESPCS, further improvement performance greatly hindered. This paper focuses on characteristics motor, cylinder, other key components in system. A compensation method based characteristic mapping proposed. PID (pressure accuracy ± 0.12 MPa), pressure improved 0.037 which opens up new way improve ESPCS.