A Study on Nonlinear Equivalent Circuit for the Electro-impulse De-icing System

Abstract

A nonlinear equivalent circuit method was proposed for studying and designing the EIDI (electro-impulse de-icing) system more effectively. After analyzing the impulsive force of skin, nonlinear equivalent load of the EIDI system which on behalf of the vibrational energy was analyzed by using the law of conservation of energy, and nonlinear equivalent circuit model related to the system parameter was established. Firstly, a three-dimensional electromagnetic field model for modeling the axisymmetric ring-type pulsed coil was presented, which was based on finite element simulation software Ansoft Maxwell ,and the expression of the normal electromagnetic force during the complete deicing cycle was obtained by numerical fitting method. Secondly, the deformation expression of the aluminum skin induced by the normal electromagnetic force was computed, then the nonlinear equivalent circuit model was researched based on the work done by the electromagnetic force. Finally, the circuit parameter in the different coil-aluminum-plate gap was designed by using nonlinear equivalent circuit model, this parameter was consistent with experiment parameters, which verifies the correctness of the circuit parameters and provides the theoretical basis for the EIDI system.