Effects of the Variation of Torque Motor Parameters on Servovalve Performance

Abstract

An electrohydraulic servovalve is an essential item of fluid power servomechanism where fast response, high power output, and working fidelity are necessary. Based on a detailed and experimentally verified mathematical model of two-stage spool position mechanical feedback electrohydraulic servovalves, sensitivity analysis has been performed The effects of variation of few torque motor electromagnetic parameters (air-gap length (thickness) at null, residual magnetic flux density (magnetic inductivity) of permanent magnet and number of turns of each coil) onthe dynamic performance of B.31.210.12.1000.U2V PPT servovalve have been studied The obtained results are in accordance with servovalve engineering design practice.