Optimized Kilowatt-Range Boost Converter Based on Impulse Rectification With 52 kW/l and 98.6% Efficiency

Maximizing the efficiency and power density of dc-dc converters demands parallel optimizations in design control, especially for variable-frequency operating over wide frequency ranges. This letter presents full-scale optimization a kilowatt-range megahertz-class boost converter based on impulse rectification. To maximize heat extraction from increase its density, entire stage is implemented single-layer insulated-metal substrate. For high efficiencies ranges, high-performance gallium nitride transistors are employed various high-frequency materials (MnZn, NiZn, air) with different geometries compared to realize wide-bandwidth inductor. Silicon carbide Schottky diodes zero reverse recovery utilized efficient rectification, impact device's current rating generated reactive overall system investigated at levels up 1 kW. The proposed optimum duty cycle control maximizes conversion gains powers prevents fatal device hard switching frequencies. optimized enables peak 98.6% along an ultrahigh 52 kW/l (850 W/in 3 ). A loss breakdown summarizes major bottlenecks be overcome by future advances electronics.