| 摘要 |
An electro hydraulic servo valve has a valve slide plate mounted in a housing for angular movement between positions in which inlet and outlet conduits and consumer conduits are connected and disconnected. The permanent magnet of a transmitter turns with the valve slide plate and cooperates with flux responsive elements so that a first signal representing the position of the valve slide plate is generated, and supplied to a first input of a differential amplifier whose second input receives a second signal representing a desired position of the valve slide plate. The differential amplifier forms a differential signal representing the difference between the desired and actual positions which is supplied to the electric input of an electro fluidic transducer whose fluidic output controls a hydraulic setting motor to move the valve slide plate from the actual position to the desired position.
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