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A DC Transformer
NTRS Full-Text: Click to View  [PDF Size: 2.7 MB]
Author and Affiliation:
Youngquist, Robert C.(NASA Kennedy Space Center, Cocoa Beach, FL, United States);
Ihlefeld, Curtis M.(NASA Kennedy Space Center, Cocoa Beach, FL, United States);
Starr, Stanley O.(NASA Kennedy Space Center, Cocoa Beach, FL, United States)
Abstract: A component level dc transformer is described in which no alternating currents or voltages are present. It operates by combining features of a homopolar motor and a homopolar generator, both de devices, such that the output voltage of a de power supply can be stepped up (or down) with a corresponding step down (or up) in current. The basic theory for this device is developed, performance predictions are made, and the results from a small prototype are presented. Based on demonstrated technology in the literature, this de transformer should be scalable to low megawatt levels, but it is more suited to high current than high voltage applications. Significant development would be required before it could achieve the kilovolt levels needed for de power transmission.
Publication Date: Jan 01, 2013
Document ID:
20130011800
(Acquired Apr 11, 2013)
Subject Category: ELECTRONICS AND ELECTRICAL ENGINEERING
Report/Patent Number: KSC-13776, KSC-2013-045
Document Type: Preprint
Meeting Sponsor: Institute of Electrical and Electronics Engineers; Washington, DC, United States
Financial Sponsor: NASA Kennedy Space Center; Cocoa Beach, FL, United States
Organization Source: NASA Kennedy Space Center; Cocoa Beach, FL, United States
Description: 10p; In English; Original contains color and black and white illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: TRANSFORMERS; DIRECT CURRENT; ELECTRICAL ENGINEERING; MATHEMATICAL MODELS; MECHANICAL DEVICES; HOMOPOLAR GENERATORS; HIGH CURRENT; MAGNETIC FIELDS; ELECTRIC POWER TRANSMISSION
Miscellaneous Notes: to be published in IEEE Transactions on Power Electronics
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Last Modified: April 11, 2013
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