SKM 2023 – scientific programme
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MA: Fachverband Magnetismus
MA 23: Poster Magnetism I
MA 23.48: Poster
Tuesday, March 28, 2023, 17:00–19:00, P1
Equivalent Circuit for the Consideration of Frequency-Dependent Effects in Electronics Simulations of Induction Hobs — •Lennart Schwan1,2, Michael Feige1, Andreas Hütten2, and Sonja Schöning1 — 1Bielefeld Institute for Applied Materials Research (BIfAM), Bielefeld University of Applied Sciences, Department of Engineering Sciences and Mathematics — 2Thin Films & Physics of Nanostructures, Bielefeld University, Department of Physics
Inductive power transfer is a well-established technology, e.g. for inductive heating in industrial applications and household appliances like inductions hobs. An inductive heating system usually consists of a coil (transmitter) which is powered by an alternating current and a ferromagnetic material (receiver), for example a cooking vessel. FEM simulations are a powerful tool for simulating the electromagnetic processes in coil and vessel. For electronics development, FEM simulations of the coil cooking vessel system are too computationally intensive.
In electronics, the coil is an RL element and thus is also represented as such in electronics simulations. This equivalent circuit is sufficient for simple considerations, but neglects that R and L are frequency dependent. Frequency dependent variables can be used in the frequency domain only but not in the important time domain simulations with non-sinusoidal signals. In order to consider the frequency dependence of R and L in time domain simulations for non-sinusoidal signals, we use an improved equivalent circuit based on passive components that includes the frequency dependence.