In this paper, a modeling approach for buck converters with magnetic-core inductors is presented. Due to the high nonlinearity of magnetic materials, the frequency-domain analysis of such circuits is not suitable for an accurate description of their behaviour. Hence, in this work, a time-domain model of buck converters with magnetic-core inductors in a Simulink® environment is proposed. As an example, the presented approach is used to simulate an eight-phase buck converter. The simulation results show that an unexpected system behaviour in terms of current ripple amplitude needs the inductor core hysteretic behavior to be thoroughly taken into account.

Accurate modeling of buck converters with magnetic-core inductors

Astorino A.;Antonini G.;
2016

Abstract

In this paper, a modeling approach for buck converters with magnetic-core inductors is presented. Due to the high nonlinearity of magnetic materials, the frequency-domain analysis of such circuits is not suitable for an accurate description of their behaviour. Hence, in this work, a time-domain model of buck converters with magnetic-core inductors in a Simulink® environment is proposed. As an example, the presented approach is used to simulate an eight-phase buck converter. The simulation results show that an unexpected system behaviour in terms of current ripple amplitude needs the inductor core hysteretic behavior to be thoroughly taken into account.
978-1-4799-6811-4
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11697/175677
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