NASA SBIR 2004 Solicitation

FORM B - PROPOSAL SUMMARY


PROPOSAL NUMBER: 04 X2.05-8671
SUBTOPIC TITLE: Power Management for Space Utilities
PROPOSAL TITLE: Decentralized Nonlinear Controller Based SiC Parallel DC-DC Converter

SMALL BUSINESS CONCERN (Name, E-mail, Mail Address, City/State/Zip, Phone)
SemiSouth Laboratories, Inc
201 Research Blvd.
Starkville, MS 39759-7704
(662)324-7607

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Jeffrey B. Casady
jeff.casady@semisouth.com
201 Research Blvd.
Starkville, MS 39759-7704
(662)324-7607

TECHNICAL ABSTRACT (LIMIT 200 WORDS)
This proposal is aimed at demonstrating the feasibility of a Decentralized Control based SiC Parallel DC-DC Converter Unit (DDCU) with targeted application for NASA's International Space Station Program and Satellite Power Systems. The proposed DDCU has three key features: a) "true" redundancy for parallel DC-DC converter based on a novel concept developed at the University of Illinois at Chicago, b) a novel nonlinear hybrid controller that achieves enhanced robustness and wider stability margin and yet achieves interleaving to reduce output current ripple, and c) SiC based power stage yielding higher breakdown voltage, temperature-sustenance, and radiation-hardness capabilities for the DDCU leading also to higher power density as compared with Si based power stage.

POTENTIAL NASA COMMERCIAL APPLICATIONS (LIMIT 100 WORDS)
? Parallel DDCU power controller for International Space Station application (see Figure 1 illustration).
? Fault tolerant satellite power system
? Any other DC or AC power management and distribution (PMAD) system of NASA that requires modularity, redundancy and fault-tolerance at a reduced cost

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (LIMIT 100 WORDS)
? Voltage-regulated modules (VRMs)
? Telecommunication server power supplies
? UPS
? Motor drives