77 K Operation of a Multi-Resonant Power Converter

TITLE AND SUBTITLE:
77 K Operation of a Multi-Resonant Power Converter

AUTHOR(S):
Biswajit Ray, Scott S. Gerber, Richard L. Patterson, and Ira T. Myers

REPORT DATE:
May 1995

FUNDING NUMBERS:
WU-233-02-0C

PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Lewis Research Center
Cleveland, Ohio 44135-3191

PERFORMING ORGANIZATION REPORT NUMBER:
E-9669

SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Washington, D.C. 20546-0001

REPORT TYPE AND DATES COVERED:
Technical Memorandum

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA TM-106941

SUPPLEMENTARY NOTES:
Prepared for the 1995 Power Engineering Society Conference sponsored by the Power Electronics Society of the Institute of Electrical and Electronics Engineers, Atlanta, Georgia, June 18-22, 1995. Biswajit Ray, National Research Council-NASA Research Associate at NASA Lewis Research Center, on leave from the University of Puerto Rico, Mayaguez Campus; Scott S. Gerber, NYMA, Inc., Engineering Services Division, 2001 Aerospace Parkway, Brook Park, Ohio 44142 (work funded by NASA Contract NAS3-27186); Richard L. Patterson and Ira T. Myers, NASA Lewis Research Center. Responsible person, Richard L. Patterson, organization code 5430, (216) 433-8166.

ABSTRACT:
The liquid-nitrogen temperature (77 K) operation of a 55 W, 200 kHz, 48/28 V zero-voltage switching multi-resonant dc/dc converter designed with commercially available components is reported. Upon dipping the complete converter (power and control circuits) into liquid-nitrogen, the converter performance improved as compared to the room-temperature operation. The switching frequency, resonant frequency, and the characteristic impedance did not change significantly. Accordingly, the zero-voltage switching was maintained from no-load to full-load for the specified line variations. Cryo-electronics can provide high density power converters, especially for high power applications.

SUBJECT TERMS:
Cold electronics; Low temperature; Electronics; Power

NUMBER OF PAGES:
8

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