Output power and efficiency in full-bridged MOSFET power inverter operating at shortwave frequency

Power loss factors in designing the full-bridge MOSFET power inverter operating at shortwave frequencies have been analyzed to improve the power conversion efficiency at a specified output power. Despite the difficulty in parallel connection of the MOSFETs in each MOSFET array, the parallel connection of the MOSFETs on the planar circuit board enhanced the output power to 500 W with a power conversion efficiency of nearly 80% at as high as 3.7 MHz. The experimental device, which had an output power of 500 W, operated reliably without any extraordinary temperature rise