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The paper presents the work that has been carried out trying to improve the behavior and the performances of DC to DC step up converters with high conversion ratio. Especially, it is studied how the design and the realization of the magnetic HF transformer can be improved in order to increase the global efficiency of hard switch isolated DC to DC converters. It is shown that a split in conductors...
EMI filters are mainly made up of passive components including capacitors and inductors. These passive components can be a significant portion of the total converter system volume. Integration techniques can be used to improve space utilization and reduce the total system volume. This paper gave a comparison on existing passive integration technologies, and then developed an integrated EMI for 2 kW...
This paper presents a 3D integrated solution that uses a low-profile planar inductor as the substrate as one of the possible methods to integrate the magnetic component with the active component. In order to reduce the inductor size to achieve a more compact integrated converter, several low-profile inductor structures with different flux path patterns (vertical or lateral) based on low temperature...
An empirical model for the low permeability LTCC magnetic material is developed based on Steinmetz equation, taking into account temperature variations and DC pre-magnetization. Steinmetz exponents and coefficient are expressed as a function of temperature and DC pre-magnetization to describe core loss for frequencies between 1 to 4 MHz, peak flux density between 5 mT to 50 mT, DC magnetic flux intensity,...
THIS paper explores opportunities and challenges in power conversion in the VHF frequency range of 30-300 MHz. The scaling of magnetic component size with frequency is investigated, and it is shown that substantial miniaturization is possible with increased frequencies even considering material and heat transfer limitations. Likewise, dramatic frequency increases are possible with existing and emerging...
Fuel cell systems often require high voltage gain and dc-dc step-up converter is a critical part. Scope of this paper is integration of inductor and transformer on a single core. Usage of integrated magnetics improves utilization of magnetic core and thus size and weight of the converter may be reduced.
This paper proposes a new integrated magnetics (IM) ZVS full-bridge Dc-Dc converter, which integrates three inductors and one transformer with a single core. Compared with the discrete solution, the proposed integrated converter has less components, smaller size, lower cost and reduced core losses. The leakage inductance of the transformer is used as energy storage inductance and the output filter...
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