A pre-sizing approach of DC-DC converters, application to design a Buck converter for the automotive domain

Abstract

International audienceThis paper presents a pre-sizing approach of DC-DC converters. This approach can be carried out in two main steps. The first step consists on determining the most adapted architecture to answer the specifications and the appropriate technologies of the passive and the active components of the selected architecture by considering major constraints (volume, cost...). The technology choice is carried out using models developed from manufacturer datasheets. The second step consists on optimizing the selected architecture by considering the appropriate technologies resulting from the first step under multi-physic constraints: thermal, losses (or efficiency), volume .... The proposed approach allows reducing significantly the computing time which is suitable in a pre-sizing phase where several parameters must be optimized and multi-physic constraints must be respected

Survey of modelling techniques used in optimisation of power electronic components

“…An equivalent frequency is derived for the arbitrary waveform to be used with the basic equation and the effects of temperature are also considered. In [46][47][48], a generalisation of Steinmetz equation based on [49], which seeks to calculate core losses in discontinuous (DCM) and continuous (CCM) conduction modes for a buck converter, is used. In these calculations, core losses in DCM depend only on frequency and maximum flux density while they depend on frequency, maximum flux density and flux density changes in CCM.…”

“…, see (7) and 8 [46][47][48]78] comprehensive analysis done for a flyback transformer see [78] for comprehensive analysis [31,32] comprehensive analysis for a low-profile transformer see [32] for comprehensive analysis [39,42,43,79,80] losses calculated from 2D solution of diffusion equation…”

Pre‐sizing methodology of embedded static converters using a virtual prototyping tool based on an optimisation under constraints method: comparaison of two power‐sharing topologies

“…This structure supplied several machines simultaneously (SMM) and non-sequential manner [2]. The originality of the present paper is the use of an optimisation approach to compare two converter's topologies in order to select the most suitable architecture allowing to respect specifications [3][4][5][6][7][8] and reaches an actual objective that is to provide virtual prototyping tools especially for power converters [9][10][11][12] to avoid physical prototypes as much as possible.…”

Pre‐sizing methodology of DC–AC converters using a virtual prototyping tool applied to sequential multi‐load systems

“…The originality of the present contribution is based on three aspects. The first one is about the generalised power switch modelling approach [2][3][4][5]. It is applied to a unidirectional voltage and bidirectional switch for voltage inverter.…”

“…However, it can be applied to a bidirectional voltage and current switch, as it is applied for the power sharing system. The second one is about the application field: aircraft system [6,7] and mutualised inverter. The third aspect is to develop an optimisation approach [8][9][10][11] allowing determining automatically the most convenient power converter architecture among different potential structures according to the number of loads (electric machines) to be supplied by the power electronics stage.…”