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Compact Isolated High Frequency DC/DC Converters Using Self-Driven Synchronous Rectification

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dc.contributor.authorSterk, Douglas Richarden
dc.contributor.committeechairLee, Fred C.en
dc.contributor.committeememberBoroyevich, Dushanen
dc.contributor.committeememberBaumann, William T.en
dc.contributor.departmentElectrical and Computer Engineeringen
dc.date.accessioned2011-08-06T14:43:56Zen
dc.date.adate2003-12-31en
dc.date.available2011-08-06T14:43:56Zen
dc.date.issued2003-12-17en
dc.date.rdate2003-12-31en
dc.date.sdate2003-12-30en
dc.description.abstractIn the early 1990's, with the boom of the Internet and the advancements in telecommunications, the demand for high-speed communications systems has reached every corner of the world in forms such as, phone exchanges, the internet servers, routers, and all other types of telecommunication systems. These communication systems demand more data computing, storage, and retrieval capabilities at higher speeds, these demands place a great strain on the power system. To lessen this strain, the existing power architecture must be optimized. With the arrival of the age of high speed and power hungry microprocessors, the point of load converter has become a necessity. The power delivery architecture has changed from a centralized distribution box delivering an entire system's power to a distributed architecture, in which a common DC bus voltage is distributed and further converted down at the point of load. Two common distributed bus voltages are 12 V for desktop computers and 48 V for telecommunications server applications. As industry strives to design more functionality into each circuit or motherboard, the area available for the point of load converter is continually decreasing. To meet industries demands of more power in smaller sizes power supply designers must increase the converter's switching frequencies. Unfortunately, as the converter switching frequency increases the efficiency is compromised. In particular, the switching, gate drive and body diode related losses proportionally increase with the switching frequency. This thesis introduces a loss saving self-driven method to drive the secondary side synchronous rectifiers. The loss saving self-driven method introduces two additional transformers that increase the overall footprint of the converter. Also, this thesis proposes a new magnetic integration method to eliminate the need for the two additional gate driver magnetic cores by allowing three discrete power signals to pass through one single magnetic structure. The magnetic integration reduces the overall converter footprint.en
dc.description.degreeMaster of Scienceen
dc.format.mediumETDen
dc.identifier.otheretd-12302003-153541en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-12302003-153541en
dc.identifier.urihttp://hdl.handle.net/10919/9648en
dc.publisherVirginia Techen
dc.relation.haspartETD_MS_Thesis_DougSterk.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectdistributed power systemsen
dc.subjectintegrated magneticsen
dc.subjectintegrated transformeren
dc.subjectself-drivenen
dc.titleCompact Isolated High Frequency DC/DC Converters Using Self-Driven Synchronous Rectificationen
dc.typeThesisen
thesis.degree.disciplineElectrical and Computer Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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