NDLI: A front-end DC/DC converter for network server applications

Content Provider	IEEE Xplore Digital Library
Author	Qun Zhao Fengfeng Tao Lee, F.C.
Copyright Year	2001
Description	Author affiliation: Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA (Qun Zhao)
Abstract	Network server power supplies call for a dual universal AC line input and 48V DC input front-end converters to generate the 380 V DC bus. To realize the DC input front-ends, nonisolation DC/DC power converters, such as continuous current mode (CCM) boost converters, are not good candidates because of their power limitations under extreme duty cycles. Cascade DC/DC power converters can meet this specific application requirement with the deficiency of extra complexity and higher cost. Although coupled inductor DC/DC converters can provide high step-up voltage gain without the penalty of extreme duty ratio, their efficiency is poor due to the losses associated with the leakage inductors. In this paper, a clamp mode coupled inductor boost converter with no extreme duty ratio is presented. The proposed topology utilizes coupled inductor to achieve high step-up gain as well as to alleviate the output rectifier reverse recovery problem. The efficiency of a 1 kW prototype is higher than 90% under nominal operation condition.
Starting Page	1535
Ending Page	1539
File Size	418780
Page Count	5
File Format	PDF
ISBN	0780370678
ISSN	02759306
DOI	10.1109/PESC.2001.954337
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-06-17
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	DC-DC power converters Network servers Inductors Power supplies Analog-digital conversion AC generators DC generators Power generation Costs Voltage
Content Type	Text
Resource Type	Article

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