An Analytical Electric Model for Coupled Inductors with Two Windings in Two-Level Converters
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Date
2025
Publication Type
Conference Paper
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yes
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Abstract
For many applications, e.g. battery or fuel cell electric vehicles, power electronic converters must achieve a high power density and conduct large DC currents. Hence, many converters require inductors, that can carry a relatively large DC bias current in addition to the ripple current without undergoing saturation. Coupled inductors have been identified as a viable option to achieve a high power density thanks to the (partial) cancellation of the DC magnetic flux in the core material. To facilitate a fast converter design, this paper presents an electric model of analytical expressions for the currents (time-domain, DC, RMS), that result in a generalised converter topology that applies rectangular (two-level) voltages with steady-state duty cycles and an arbitrary phase-shift to a two-winding coupled inductor with arbitrary coupling and turns ratio. The presented model is also applicable to converter topologies with transformers, e.g. Dual Active Bridge converters, by setting the DC values of the inductor currents to zero.
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published
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Book title
2025 Energy Conversion Congress & Expo Europe (ECCE Europe)
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Volume
Pages / Article No.
11238363
Publisher
IEEE
Event
Energy Conversion Congress & Expo Europe (ECCE Europe 2025)
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Subject
Coupled inductor; transformer; analytical model; electric model; DC-DC converter; boost converter
Organisational unit
03889 - Biela, Jürgen / Biela, Jürgen