A Single-phase Ultra-wide-efficient Load Range AC/DC Power Conversion Solution for DC Infrastructure Power Supply Applications

A single-phase AC/DC power conversion solution for DC infrastructure, such as DC home and office, with ultra-width-efficient load range is proposed. 98.0% efficiency from 10% load and is proposed. It is a modular structure with five parallel connected modules in interleaving operation. A load-base Active Module Control (AMC) determines the suitable number of active module(s) to achieve higher efficiency across the entire load range. A 5kW, 220V/50Hz AC input, 375V DC output experimental prototype has been built and evaluated. Operating principle, steady state and dynamic response of the proposed solution will be explained.