Re-architecting 48V power systems with a novel non-isolated bus converter

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20164202906632
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(1) VICOR, Andover; MA, United States | 1600年 / Institute of Electrical and Electronics Engineers Inc., United States期
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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 by advances in semiconductor technologies; bus converter performance is highly dependent upon converter topology. Performance metrics impacted by bus converter topology include both power conversion efficiency [2] and power system stability [3]. The 'Sine Amplitude Converter' bus converter topology [4; 5] has proven to be superior to traditional topologies [6] in virtually every significant performance metric; including conversion efficiency; power density; footprint; bandwidth; and system stability. As telecom power system requirements have matured; the 'Sine Amplitude Converter' may now enable further system improvements. Specifically; grounding requirements of telecom systems are compatible with bus converters that do not require galvanic isolation [7]. This paper presents series-connected bus converters [7] optimized for use in non-isolated bus architectures (NIBA) by having primary and secondary converter stages connected in series. © 2015 IEEE;
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