Search

Electrohydraulic servovalves used in various aircraft systems (flight control system and auxiliary power unit) are a key element in fluid flow and pressure control. This article presents a 3-D analytical modeling method of the electromagnetic performance of servovalves torque motor. This analytical model, based on a reluctance network, allows us to quickly evaluate the actuator performance taking into account the complex 3-D geometry and the high flux leakage rate. This model enables to reduce the performance analysis time by about 89% compared to the conventional 3-D finite element calculation time. This is valuable for the design and optimization of the actuator geometry.

This article proposes a formulation to minimize the torque ripple of switched reluctance machines (SRMs) by means of topology optimization. The novelty lies in targeting critical harmonics which allows for more control, both in the design of the rotor and the harmonic content of the torque, during the ripple minimization. An efficient gradient-based algorithm is used to solve the optimization problem and the gradient is obtained using the adjoint variable method.