An AC High Frequency Quasi Square Wave Bus Voltage for the Next Generation of Distributed Power Systems

摘要

An advanced Alternating Current Distributed Power System (AC-DPS) is proposed as a new low-price and high-performance alternative to the typical Direct Current Distributed Power System (DC-DPS). A high frequency quasi square wave or trapezoidal AC waveform is distributed on the DPS power bus from the Bulk Power Front-End Rectifier/Inverter Stage, to a variety of AC to DC Secondary Power Converters. Zero-Voltage (ZV) switching is used in the DC/AC inverter, and various types of AC/DC power conversion stages are available at the board level or point-of-use loads, including Zero-Current (ZC) Resonant Switching, for post regulation, if needed. This next generation DPS can provide lower cost, board space, simplicity, improved reliability, and manufacturability. This technology may also be well suited for distributed power in the higher power Personal Computer (PC), with solutions for higher di/dt power demands of the modern microprocessors. A 250W prototype system with 48VAC DPS bus at 250KHz was tested.