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• W3112889633 abstract "Maximizing the efficiency and power density of dc-dc converters demands parallel optimizations in design and control, especially for variable-frequency converters operating over wide frequency ranges. This letter presents the full-scale optimization of a kilowatt-range megahertz-class boost converter based on the impulse rectification. To maximize the heat extraction from the converter and increase its power density, the entire power stage is implemented on a single-layer insulated-metal substrate. For high efficiencies over wide frequency ranges, high-performance gallium nitride transistors are employed and various high-frequency materials (MnZn, NiZn, and air) with different geometries are compared to realize a wide-bandwidth inductor. Silicon carbide Schottky diodes with a zero reverse recovery are utilized for efficient high-frequency rectification, and the impact of the device's current rating on its generated reactive power and the overall system efficiency are investigated at different power levels up to 1 kW. The proposed optimum duty cycle control maximizes the conversion efficiency at different gains and powers and prevents fatal device hard switching at high frequencies. The optimized converter enables a peak efficiency of 98.6% along with an ultrahigh power density of 52 kW/l (850 W/in <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sup> ). A loss breakdown summarizes major efficiency bottlenecks to be overcome by future advances in power electronics." @default.
• W3112889633 created "2020-12-21" @default.
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• W3112889633 creator A5073404392 @default.
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• W3112889633 date "2021-07-01" @default.
• W3112889633 modified "2023-10-14" @default.
• W3112889633 title "Optimized Kilowatt-Range Boost Converter Based on Impulse Rectification With 52 kW/l and 98.6% Efficiency" @default.
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• W3112889633 doi "https://doi.org/10.1109/tpel.2020.3045062" @default.
• W3112889633 hasPublicationYear "2021" @default.
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