Type of Document	Dissertation
Author	Chen, Wei
Author's Email Address	wchen@vt.edu
URN	etd-4198-143730
Title	Low Voltage High Current Power Conversion with Integrated Magnetics
Degree	PhD
Department	Electrical Engineering
Advisory Committee	Advisor Name Title Lee, Fred C. Committee Chair Borojevich, Dushan Committee Member Chen, Dan Y. Committee Member Jovanovic, Milan M. Committee Member Nelson, Douglas J. Committee Member
Keywords	power converter integrated magnetics
Date of Defense	1998-04-27
Availability	unrestricted
Abstract Very low voltage, high current output requirement have necessitated improvements in power supply's density and efficiency. Existing power conversion techniques cannot meet very stringent size and efficiency requirements. By applying the proposed magnetic integration procedure, new integrated magnetic circuits featuring low loss, simple structure, and ripple cancellation technique are then developed to overcome the limitations of prior art. Both cores and windings are integrated. Consequently, the power loss and the size of the integrated magnetic device are greatly reduced. Detailed analysis and design considerations of the proposed circuits are presented. As a result of applying the proposed technique, very high density, high efficiency, low voltage, high current power modules were developed. A typical example features an isolated 3.3V/30A power module with a power density of 130W/in3 and an efficiency of 90% at 500 KHz switching frequency.
Files	Filename       Size       Approximate Download Time (Hours:Minutes:Seconds)     28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access    Appendices.pdf 212.22 Kb 00:00:58 00:00:30 00:00:26 00:00:13 00:00:01   Ch1.pdf 160.93 Kb 00:00:44 00:00:22 00:00:20 00:00:10 < 00:00:01   ch2t.pdf 264.07 Kb 00:01:13 00:00:37 00:00:33 00:00:16 00:00:01   ch3.pdf 199.99 Kb 00:00:55 00:00:28 00:00:24 00:00:12 00:00:01   CH4.pdf 124.37 Kb 00:00:34 00:00:17 00:00:15 00:00:07 < 00:00:01   ch5.pdf 275.11 Kb 00:01:16 00:00:39 00:00:34 00:00:17 00:00:01   Ch6.pdf 109.34 Kb 00:00:30 00:00:15 00:00:13 00:00:06 < 00:00:01   ch7.pdf 28.00 Kb 00:00:07 00:00:04 00:00:03 00:00:01 < 00:00:01   frontmatter.pdf 33.16 Kb 00:00:09 00:00:04 00:00:04 00:00:02 < 00:00:01   reference.pdf 23.73 Kb 00:00:06 00:00:03 00:00:02 00:00:01 < 00:00:01   VITA.pdf 4.50 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01

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