Résumé
9th International Conference on Recent Advances in Aerospace
Actuation Systems and Components (R3ASC'23), Sep 2023, Toulouse, France The torque motor is the most common technology used in electrohydraulic
two-stage servovalves to drive the hydraulic pilot stage. As it is a key
component in these valves, its performance considerably affects the overall
performance of servovalve systems. Modeling accurately the magnetic behavior of
the torque motor will help to get a more realistic performance of the
servovalve at different operating conditions during the product design and
development stage. In this paper, an advanced model of the torque motor is
presented. The aim is to integrate it into the overall multiphysics model of
the servovalve through a multi-variable function obtained using the proposed
modeling tool. The advanced reluctance network model has been developed by
progressively considering various magnetic phenomena, including flux leaks
between different parts and variations in magnetic induction. This model allows
rapid assessment of the magnetic performance at various operating temperatures
or using different ferromagnetic materials, without the need for additional
analysis in 3D finite element software.