A development of the large capacity telecommunications rectifier system using series-resonant technology and half-bridge topology

The development of a 250 kW rectifier system for telecommunication applications using the series-resonant method in a half-bridge topology is detailed in this paper. The proposed system employs an AC distributed power system, which makes it possible to install the power supply close to the switching system, at lower costs and less space, to decrease the power loss in the power feeder system. The proposed system can also use a centralized power system just by extending or exchanging the old equipment. The developed rectifier module uses the resonant control method and a series-resonant technology comprised of two main switches and make a fundamental unit for a small-size and lightweight 100 A module; it has a capacity of 1000 A per rack. The rectifier module adopts a natural air cooling system and an n+1 redundant power system, which improves the reliability since each module is not affected by other broken modules.