Title :
Low-temperature operation of a buck DC/DC converter
Author :
Ray, Biswajit ; Gerber, Scott S. ; Patterson, Richard L. ; Myers, Ira T.
Author_Institution :
NASA Lewis Res. Center, Cleveland, OH, USA
Abstract :
Low-temperature (77 K) operation of a 42/28 V, 175 W, 50 kHz PWM buck DC/DC power converter designed with commercially available components is reported. Overall, the power converter losses decreased at 77 K compared to room temperature operation. A full-load efficiency of 97% was recorded at liquid-nitrogen temperature, compared to 95.8% at room temperature. Power MOSFET operation improved significantly whereas the output rectifier operation deteriorated at low-temperature. The performance of the output filter inductor and capacitor did not change significantly at 77 K compared to room temperature performance. It is possible to achieve high-density and high efficiency power conversion at low-temperatures due to improved electronic, electrical and thermal properties of materials
Keywords :
DC-DC power convertors; PWM power convertors; circuit testing; cryogenic electronics; field effect transistor switches; power MOSFET; power field effect transistors; power semiconductor switches; switching circuits; 175 W; 42 V; 48 V; 50 kHz; 77 K; 95.8 percent; 97 percent; PWM buck DC/DC power converter; capacitor; full-load; inductor; losses; low-temperature operation; output filter; output rectifier; performance; power MOSFET; Capacitors; DC-DC power converters; Filters; Inductors; MOSFET circuits; Power MOSFET; Pulse width modulation; Pulse width modulation converters; Rectifiers; Temperature;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1995. APEC '95. Conference Proceedings 1995., Tenth Annual
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2482-X
DOI :
10.1109/APEC.1995.469053
