Voltage Driven Finite Element Analysis of a Plunger Core Reactor with Parallel Winding Paths

Inhalt:
The paper presents 3D finite element analyses of a plunger core reactor with four parallel connected winding paths. Due to the parallel windings and the magnetic coupling, voltage driven analyses have to be used to determine the current distribution. Thereby, the finite element model utilizes a direct circuit coupling to take into account for the applied voltage and the parallel windings paths. Consequently, the four coil currents are obtained with the full influence of the asymmetric winding arrangement according to the position of the plunger core. Moreover, the Lorentz forces acting on the windings and the Maxwell forces acting on the plunger core are calculated in dependence of the plunger core air-gap.