METHOD OF CONTROL OF ELECTROHYDROMECHANICAL DRIVE Russian patent published in 1994 - IPC

FIELD: hydraulic automation. SUBSTANCE: signal from sensor 2 is furnished to computer 1 where magnitude of preset corrected torque is determined. This magnitude is compared with magnitude of signal from sensor 6. According to angular velocity of shaft of hydraulic motor 4 and magnitude of corrected torque of shaft of hydraulic motor 4, magnitude of preset pressure drop is determined for hydraulic motor 4 which is compared with magnitude of signal of sensor 7. Signal formed at output of computer 1 directly controls the DC voltage which is fed to electric motor 9 (control panel). Rotation from electric motor 9 is transmitted to pump through differential reduction gear 8. In further operation, in case of change of signals furnished from sensors 5, 6, 7, voltage fed to electric motor 9 changes as well. EFFECT: enhanced efficiency. 2 cl, 3 dwg