Modelling eddy currents and hysteresis in a transformer laminate

Abstract

4~4.simct-A C a u e r circuit model of a transformer lami n a t e is presented. It considers saturation, e d d y currents a n d hysteresis. T h e simulation results agree t o experiments with a n Epstein f r a m e in t h e 10-200 Hz range. T h e p a p e r includes a description of a computationally fast hysteresis model with few adjustable p a r a m e t e r s a n d a physical approach to derive t h e C a u e r circuit. T h e model can b e used u n d e r various time-transient conditions a n d can easily b e implemented into a larger system in a circuit simulation package, such as S a b e r , t o s t u d y a transformers interaction with switching overvoltages, for example.

Coupled FEM and lumped circuit model of the electromagnetic response of coaxially insulated windings in two slot cores

“…As in previous high-frequency models of steel laminates used for power applications [16,[23][24][25][26], it neglects anomalous effects, which are related to domain rotations and displacements [22]. Hysteresis is also neglected.…”

Simplified Design of Common-Mode Chokes for Reduction of Motor Ground Currents in Inverter Drives

“…We first consider a conservative assumption of an available permeability of µ a = 10 000µ 0 . From (19) and (20), we can calculate the required area and volume as a function of the number of turns, as shown in Table III. Although the core volume decreases significantly for large numbers of turns (∝ 1/N ) (Fig.…”

Laminated iron core losses evaluation and measurements

“…Under standard measurement conditions, specific total loss is measured only at sinusoidal magnetic induction. However the actual magnetic induction waveform of an electric machine is usually non-sinusoidal and the specific power loss values are not directly applicable because of the included harmonic components which can cause a large additional increment of the specific total loss [1][2][3][4][5][6][7][8].…”