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A power electronics transformer (PET) based on dual active bridge (DAB) with input series and output parallel (ISOP) cascaded topology is studied in this paper. Fe-based nanocrystalline alloys transformer cores and Silicon Carbide (SiC) power MOSFETs are adopted to improve the power density and efficiency. Mathematical derivation of the input voltage distribution is deduced with the conclusion that...
In this paper, an inductor–inductor–capacitor (LLC) resonant dc–dc converter design procedure for an onboard lithium-ion battery charger of a plug-in hybrid electric vehicle (PHEV) is presented. Unlike traditional resistive load applications, the characteristic of a battery load is nonlinear and highly related to the charging profiles. Based on the features of an LLC converter and the characteristics...
This paper presents a digital controlled gradient amplifier for magnetic resonance imaging that is composed of an H-bridge of power MOSFETs with the voltage and current ratings of 150V/240A. An output filter is designed for both differential and common modes that can be decoupled in the circuit model. A digital tracking control algorithm, including a full-state feedback and a feed-forward loop, is...
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