High-Power-Density, Rad-hard, SiC Based, Intelligent Multi Module DC/DC Converter PMAD System For Optimal Energy Utilization

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: W9113M-09-C-0132
Agency Tracking Number: B083-012-0476
Amount: $99,996.00
Phase: Phase I
Program: SBIR
Awards Year: 2009
Solicitation Year: 2008
Solicitation Topic Code: MDA08-012
Solicitation Number: 2008.3
Small Business Information
535 W. Research Center Blvd., Suite 209, Fayetteville, AR, 72701
DUNS: 121539790
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Roberto Schupbach
 Chief Technology Officer
 (479) 443-5759
Business Contact
 Sharmila Mounce
Title: Business Operations Manager
Phone: (479) 443-5759
Email: smounce@apei.net
Research Institution
Increasing power density and efficiency, reducing size and weight, and introducing standardization of electronics systems are all goals of the STSS program. The performance of Power Management and Distribution (PMAD) systems has great impact on the energy storage systems of the spacecraft or satellite. APEI, Inc proposes to develop rad-hard SiC based modular DC/DC converter PMAD systems. The modular rad-hard SiC PMAD concept will enable seamless scalability and power sharing among modules for space applications. It will also allow the electrical removal of a failed module to provide uninterrupted power. APEI’s proposed modular converter technology is also the gateway to two advanced optimal energy utilization techniques: 1) Battery run-time extension—Battery capacity decreases with increasing discharge load current. By using the modular PMADs, the current load can be distributed among different batteries (from the existing redundant systems), which increases the amount of the maximum nominal capacity utilized. 2) Maximum efficiency tracking—The efficiency of a typical converter diminishes as the power demand decreases; thus, relegating the operation of the converter to a low-efficiency point for low power demands. APEI’s proposed modular PMAD technology will dynamically tailor the number of “active/inactive” modular PMADs to the existing power demands in order to always operate at maximum efficiency.

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