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Highly efficient multi-cell rectifier using low-voltage GaN transistors has been proposed for future 380-V dc distribution in data centers. A 98.8% full-bridge 33- to 48-V ac-dc cell converter has been developed by using GaN transistors. This cell converter maximizes the performance of the multi-cell rectifier based on the series-parallel connection topology of isolated power converters. The potential...
A current-fed ac-dc converter using Gallium Nitride (GaN) power devices has been proposed to realize high power density ISOP (Input Series and Output Parallel)-IPOS (Input Parallel and Output Series) converter-based dc distribution system. The current-fed converter becomes the strong candidate in the ISOP-IPOS converter-based dc distribution system because this system expands the possibility of the...
An inductively coupled contactless dc connector has been proposed for the next-generation 380-V dc distribution system in data centers. A LLC resonant dc–dc converter topology with gallium nitride (GaN) power transistors has been applied to realize the short-distance highly efficient contactless power transfer. A prototype of a 1.2-kW 384- to 192-V connector has been fabricated and the conversion...
Contactless DC connector has been proposed for the next generation 380 V DC distribution system in data centers. A LLC resonant DC-DC converter topology with Gallium Nitride (GaN) power transistors has been applied to realize the short-distance inductively-coupled connector. A prototype of a 1.2 kW 384 V–192 V connector has been fabricated under 500 kHz operation. The conversion efficiency of 95%...
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