DIRECT CONTROLMULTIPLE-ARM MAGNETOSTRICTION ELECTROHYDRAULIC AMPLIFIER Russian patent published in 2008 - IPC F15B3/00 

FIELD: engines and pumps.

SUBSTANCE: amplifier incorporates the working fluid source with feed lines and permanent throttles, a slide valve device, a "ПП"-like magnetostriction drive with the dog in its central part representing an even number of differential arms with the one-type windings and a control unit. On forming opposite-phase current signals and feeding them to appropriate windings, the magnetostriction drive dog is pole-shifted and the operating pressure in the slide-valve mechanism chambers is varied to control the actuator representing a hydraulic engine in the required operating range.

EFFECT: higher reliability and expanded performances.

1 dwg