In dual active bridge (DAB) converters, there can be transformer current ringing, especially when the turns ratio is high. It induced by high dv/dt generated fast switching as well low impedance of magnetic tank at high-frequency range. To quantify influence tank, its model thoroughly modeled considering all parasitic components. found that capacitors magnetics do not equally affect and thereby...

This paper deals with a generic methodology to evaluate the magnetic parameters of contactless power transfer systems. Neumann’s integral has been used to create a matrix method that can model the magnetics of single coils (circle, square, rectangle). The principle of superposition has been utilized to extend the theory to multi-coil geometries, such as double circular, double rectangle and dou...

Academic usage of COMSOL for student use has only begun in the last five years at USNA. Student involvement comes in four types, course-wide usage, focused course related work, student projects and semester-long research projects. A summary of how COMSOL has been successfully used at USNA will be given, showing examples of student work, with topics ranging from acoustics, fluid dynamics, pde so...

This work aimed to test the new Mag-Bind® TotalPure magnetic beads in construction of a genomic library corn and sugarcane endophytes. The technique Next-Generation Sequencing (NGS) is very expensive for that, one most reagents are magnetics that serve purify amplified DNA separate by size depending on their proportion, as shown Illumina protocol. We observed use these beads, which five times c...

LLC converter design optimization remains a challenging task for varying loads such as in battery chargers. There are numerous L-L-C combinations to choose from space that can satisfy the required voltage gains of application. An accurate magnetic model is essential optimally size passive components according application needs. This paper provides new tool gapped core magnetics optimize transfo...

In this article, a partial parallel dual active bridge (PPDAB) converter is proposed to lower the current stress over switching devices on low-voltage side. Gallium Nitride (GaN) transistors are used improve efficiency and power density at 1 MHz frequency. Moreover, in order reduce number of magnetic components achieve more compact design, with unique three-leg core geometry, new method integra...