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A modular isolated soft-switching dc–dc converter that can offer two levels of fault tolerance is proposed. A typical application is the wind energy conversion system used in offshore series-dc wind farm concept. The converter consists of input-parallel-output-series (IPOS) connected modules. Each module is a full-bridge dc–dc converter with an active rectifier, which can achieve zero voltage switching...
This paper presents a three-phase isolated soft-switching dc-dc converter suitable for high-power applications. Three-phase star-connected high-frequency transformers provide isolation between input and output. Primary-side of the converter consists of three-phase inverting bridge with reverse-blocking switches. Secondary-side consists of three-phase diode bridge followed by dc output capacitors,...
A new topology of current-fed zero current switching (ZCS) three-phase DC-DC converter is proposed in this paper. The converter architecture is composed of a current-fed three-phase three-leg IGBT bridge, three single-phase high frequency transformers with star-connected primary, and three single-phase rectifier bridges with paralleled outputs. Primary IGBTs of the proposed modular phase converter...
A reconfigurable dual-band low noise amplifier (LNA) for 3.4-3.6 GHz IMT-Advanced and 4.2-4.8 GHz UWB systems is presented in this paper. Two different input matching networks with source-inductive-degeneration cascode configuration are used to switch at two different frequency bands. The parallel capacitors between the input MOSFETs' gate and source are used to optimize noise factor of the LNA. The...
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