ELECTROHYDRAULIC SERVO DRIVE Russian patent published in 1995 - IPC

FIELD: electrohydraulic engineering. SUBSTANCE: current pickup 27 is connected to the circuit of driving electromotor 1 for controlling the drive so that the low velocity corresponds large pressure drop and vice versa. This gives possibility to use electric motor 1 of lesser power. Current pickup 27 generates a signal which is fed to limiter-shaper 10, which restricts the signal at the inlet of the second adder 9, decreases rotation angle of inclined disk 5 and, hence, maintains efficiency of pump 4 at a level corresponding to a nominal power consumed by electric motor 1. EFFECT: enhanced reliability. 1 dwg