Analysis of dynamic characteristics of tubular linear electromagnetic launcher under inter-turn short-circuit fault

The objective of this work is to present modeling and analysing dynamic performances of three-phase Tubular linear Electromagnetic Launchers (TEML) under inter-turn short circuit fault. The model is based on the coupled electromagnetic equation and mechanical one. The method uses the coupled of magnetic equation solved using 2D Finite Element (FEM) with electrical equation deduced from equivalent electrical circuit supplying by capacitors bank and solved analytically. The coupled with mechanical equation is ensured by magnetic Lorentz force. The displacement of the projectile obtained after the resolution of the mechanical equation is taken into account by using the Macro-Element (ME) technique. This technique is advantageous compared to other methods used to taking into account the movement. The short circuit fault is taken into account by modified of resistance and inductance of the system. Some results, such the magnetic force are confronted to the literature given result in order to validate our model. The principally obtained results are the velocity, displacement of the projectile and the propulsion magnetic force. Other hand the values of obtained results are compared under healthy and faulty conditions.