Scholarly
    Communications Project


Document Type:Dissertation
Name:Wei Chen
Email address:wchen@vt.edu
URN:1998/00498
Title:Low Voltage High Current Power Conversion with Integrated Magnetics
Degree:Doctor of Philosophy
Department:Electrical Engineering
Committee Chair: Dr. Fred Lee
Chair's email:fclee@vtvm1.cc.vt.edu
Committee Members:Dushan Borojevic
Dan Chen
Milan Jovanovic
Douglas Nelson
Keywords:integrated magnetics, power converter
Date of defense:april 27, 1998
Availability:Release the entire work immediately worldwide.

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.

List of Attached Files

Appendices.pdf CH4.pdf Ch1.pdf
Ch6.pdf VITA.pdf ch2t.pdf
ch3.pdf ch5.pdf ch7.pdf
frontmatter.pdf reference.pdf


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