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Magnetic components modeling including thermal effects for DC-DC converters virtual prototyping

Abstract : The increasing complexity of power electronic devices requires the intervention of computer-aided design in electrical engineering. Development of electric/electronic systems nowadays is carried out by the help of virtual prototyping, in which simulation software are used to predict components behavior without investing time and money to build physical prototypes. The increasing demand of low power, high efficiency devices forced designers to precisely analyze losses in each component constituting the system. Magnetic components constitute a major part of electronics devices. Therefore accurate modeling of magnetic materials is mandatory in order to predict their realistic behavior under variable operating conditions. Our work takes place in this context by proposing a non-linear dynamic model of magnetic components for use in circuit simulators. It includes the material nonlinear hysteretic and dynamic behaviors with accurate modeling of winding and core losses in addition to thermal effects that are not taken into account by existing models. The model is based on the principle of separation of static and dynamic contributions as well as Bertotti’s theory. VHDL-AMS is used as a modeling language due to its multi-domain modeling feature, allowing coupling with a thermal model. The magnetic component model is implemented in circuit simulation software “Simplorer” It is then tested in a widely used power converter application, the buck converter, to ensure non conventional excitation. The model is validated for different core inductors, different current ripples, different loads, different temperatures and a wide frequency range
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Submitted on : Saturday, March 7, 2015 - 1:32:03 AM
Last modification on : Monday, September 13, 2021 - 2:44:04 PM
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  • HAL Id : tel-01127289, version 1


Alaa Hilal. Magnetic components modeling including thermal effects for DC-DC converters virtual prototyping. Electric power. Université Claude Bernard - Lyon I, 2014. English. ⟨NNT : 2014LYO10313⟩. ⟨tel-01127289⟩



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