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Intermediate Bus Architectures have been popular in the telecom industry for their ability to easily accommodate a wide variety of loads from the telecom industry's common 36–60V distribution voltage range [1]. A key performance metric of telecom power systems is based on the performance of the bus converter used to enable this architecture. While point-of-load converter performance is mostly driven...
Among the many advantages newer 400V DC distribution systems have over traditional AC distribution systems are improvements in efficiency, power density, and power-flow management. In these new DC power systems, AC “power supplies” are replaced by DC “power components” which enable an assortment design enhancement choices. This paper presents several new power system architectures that have been optimized...
Very high switching frequency (1 MHz or more) is highly desired for dc–dc converters to achieve high power density. State-of-the-art dc–dc converters are capable of achieving high-efficiency with the high-switching frequency, which promotes an opportunity and challenge for a redesign of the traditional input filters. This paper describes an optimal input filter design with minimum components count,...
Hybrid and Pure-electric vehicles present many design and optimization challenges from the system perspective. One of these challenges is to effectively interface the high voltage energy storage device, typically the traction battery, with the legacy 12V system. Traditional DC-DC converters can accomplish this function, but require significant space, operate at relative low efficiency and add considerable...
This paper describes an optimal input filter design with minimum components count, used for a transformer-coupled zero voltage switching buck-boost DC-DC converter. This input filter topology consists of fewer passive components than common input filter topologies. The proposed methodology leverages parasitic parameters of both converter and filter elements in order to achieve optimal performance...
380V DC distribution is becoming a necessary choice for new telecom and datacenter power infrastructure [1,2,3]. As state-of-the-art computing, routing and optical hub equipments continue to require more power, classic 48V distribution quickly becomes expensive to install and operate due to I2R losses; at the same time, AC distribution utilizing AC UPS becomes too expensive and complicated. While...
For a majority of applications implemented today, the Intermediate Bus Architecture (IBA) has been the preferred power architecture. This power architecture has led to the development of the isolated, semi-regulated DC/DC converter known as the Intermediate Bus Converter (IBC). Fixed ratio Bus Converters that employ a new power topology known as the Sine Amplitude Converter (SAC) offer dramatic improvements...
This paper introduces a new DC/DC power supply architecture, called “Yeaman Topology”. The main characteristic of this topology is to separate the output voltage regulation function from the bulk power conversion function, implementing two stages that share a common input, and have their outputs in series. Regulation is achieved by controlling only a fraction of the total output power. Trade-offs...
The off-line-power-supply market is increasingly demanding greater power efficiency and, even more often, multiple output voltages. While the general market trend and government regulations have been driving AC-DC-converter-efficiency requirements, the second trend is a function of applications' power requirements as is the case in typical consumer-electronic equipment such as LCD TVs. This paper...
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