Abstract
Knowing the complex relative permeability of a ferrite or nanocrystalline core material is crucial to predict the insertion impedance of common-mode chokes.
In practice, however, the material properties are often not known across the full desired frequency range. Additionally, factors like core shape, lamination and strip thickness influence the effective permeability and consequently the choke’s impedance behaviour. This paper presents a workflow to create core material models that can be used in electromagnetic simulations to estimate the impedance behaviour of common-mode chokes. The core’s material characteristics are determined by iteratively fitting model parameters to an impedance measurement using a generic laboratory setup. The resulting core model is then employed to predict the impedance of a common-mode choke
in the intended application.
In practice, however, the material properties are often not known across the full desired frequency range. Additionally, factors like core shape, lamination and strip thickness influence the effective permeability and consequently the choke’s impedance behaviour. This paper presents a workflow to create core material models that can be used in electromagnetic simulations to estimate the impedance behaviour of common-mode chokes. The core’s material characteristics are determined by iteratively fitting model parameters to an impedance measurement using a generic laboratory setup. The resulting core model is then employed to predict the impedance of a common-mode choke
in the intended application.
| Original language | English |
|---|---|
| Title of host publication | 26th European Conference on Power Electronics and Applications |
| Subtitle of host publication | EPE25 |
| Place of Publication | Paris, France |
| Number of pages | 6 |
| DOIs | |
| Publication status | Published - 31 Mar 2025 |
Keywords
- Nanocrystalline Cores
- Filters
- Modelling
- Finite Element Simulation (FEM)
- EMC