Electro-hydraulic actuating apparatus for a continuously...

Details Electro-hydraulic actuating apparatus for a continuously... Electro-hydraulic actuating apparatus for a continuously...

G - Physics

05

D

341/103

G05D 16/20 (2006.01) F15B 11/08 (2006.01) F15B 21/08 (2006.01) G05B 5/01 (2006.01)

Patent

CA 1217258

Abstract An electro-hydraulic actuating apparatus for a continuously adjustable servo-valve comprises a regulator which delivers an error signal (F3) depending on the regulating departure. Upon exceeding their limiting value, two comparators each associated with one direction of adjustment are caused by the error signal to deliver an output signal for operating a control valve arrangement having magnetic valves. The error signal (F3) is formed by an A.C. voltage with at least one inclined flank, of which the mean value (M) depends on the regulating departure and the half-period is larger than the reaction time of the magnetic valves.

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