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Digital Control Technologies for Modular DC-DC ConvertersRecent trends in aerospace Power Management and Distribution (PMAD) systems focus on using commercial off-the-shelf (COTS) components as standard building blocks. This move to more modular designs has been driven by a desire to reduce costs and development times, but is also due to the impressive power density and efficiency numbers achieved by today's commercial DC-DC converters. However, the PMAD designer quickly learns of the hidden "costs" of using COTS converters. The most significant cost is the required addition of external input filters to meet strict electromagnetic interference (MIAMI) requirements for space systems. In fact, the high power density numbers achieved by the commercial manufacturers are greatly due to the lack of necessary input filters included in the COTS module. The NASA Glenn Research Center is currently pursuing a digital control technology that addresses this problem with modular DC-DC converters. This paper presents the digital control technologies that have been developed to greatly reduce the input filter requirements for paralleled, modular DC-DC converters. Initial test result show that the input filter's inductor size was reduced by 75 percent, and the capacitor size was reduced by 94 percent while maintaining the same power quality specifications.
Document ID
20020038857
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Button, Robert M.
(NASA Glenn Research Center Cleveland, OH United States)
Kascak, Peter E.
(Ohio Aerospace Inst. Brook Park, OH United States)
Lebron-Velilla, Ramon
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
September 7, 2013
Publication Date
February 1, 2002
Subject Category
Spacecraft Propulsion And Power
Report/Patent Number
E-13191
NAS 1.15:211369
NASA/TM-2002-211369
Meeting Information
Meeting: 2000 Aerospace Conference
Location: Big Sky, MT
Country: United States
Start Date: March 19, 2000
End Date: March 25, 2000
Sponsors: Institute of Electrical and Electronics Engineers
Funding Number(s)
PROJECT: RTOP 755-1A-11
Distribution Limits
Public
Copyright
Public Use Permitted.
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