3-D Multistrands Inductor Modeling: Influence of Complex Geometrical Arrangements

Abstract

International audienceWe study multistrands inductors in the context of high-frequency induction processes. They present the advantage of reducing Joule losses compared with solid inductors. We remind why that type of cable seems to be promising and what electromagnetic effects are already identified. We have to understand precisely what happens inside the inductor. Numerical simulation of the electromagnetic behavior of these objects is complicated due to the complexity of their 3-D geometry and to the size of the generated numerical system. We have developed a 3-D electromagnetic software based on an integral methods using classical Biot and Savart law. We applied this model for the simulation of multistrands cables with helical arrangement of strands. Execution time is reduced by the parallelization of the system building and the solver. We present some results obtained with 3-D simulations using integral methods for different configurations

A recursive methodology for modelling multi-stranded wires with multilevel helix structure

“…In these approaches, strands placed in the bundle at the same radial position are indistinguishable and, therefore twisting effects as the cancellation of external flux are not captured and often are introduced by means of extra boundary conditions. Comparatively, 3-D FEA approaches are much less frequent and are restricted to the case of one bundle of several strands [18,19].…”

Efficient finite element modelling of litz wires in toroidal inductors

“…Such details are important for the manufacturability and the cost of litz wire. Hence, accurate knowledge of the loss behaviour under complex twisting is one of the important objectives for correct litz wire selection [17,18].…”

Wide-Band Modeling On-Chip Spiral Inductors Using Frequency-Dependent Conformal ADI-FDTD Method

“…With development of computational electromagnetics, one can model the inductor characteristics accurately by using three dimensional (3-D) electromagnetic simulation solver [6]- [8]. A full-wave method is used to process the substrate loss of the inductor [6].…”

“…With development of computational electromagnetics, one can model the inductor characteristics accurately by using three dimensional (3-D) electromagnetic simulation solver [6]- [8]. A full-wave method is used to process the substrate loss of the inductor [6]. To analyze spiral inductors on layered silicon substrates [7], the volume integral-equation method is employed to detect the uneven current distribution in the coil [8]; and a semi-analytical model is built for the circular spiral inductors on a substrate.…”