Title :
20 kHz, 25 kVA node power transformer
Author_Institution :
NASA Lewis Res. Center, Cleveland, OH, USA
Abstract :
The electrical and mechanical design information and the electrical and thermal testing performed on the 440-208 V RMS, 20 kHz, 25 kVA prototype node transformer are summarized. The calculated efficiency of the node transformer is 99.3% based on core loss and copper loss test data, and its maximum calculated load regulation is 0.7%. The node transformer has a weight of 19.7 lb and has a power density of 0.8 lb/kW. The hot-spot temperature rise is estimated to be 33° above the cold plate mounting base. This proof-of-concept transformer design is a viable candidate for the Space Station Freedom application
Keywords :
artificial satellites; power transformers; space vehicle power plants; 20 kHz; 25 kVA; 440 to 208 V; Space Station Freedom; copper loss; core loss; design; electrical testing; load regulation; node power transformer; satellites; space power; thermal testing; Assembly; Coils; Cold plates; Copper; Power system management; Power transformer insulation; Power transformers; Space technology; Thermal conductivity; Transformer cores;
Conference_Titel :
Energy Conversion Engineering Conference, 1989. IECEC-89., Proceedings of the 24th Intersociety
Conference_Location :
Washington, DC
DOI :
10.1109/IECEC.1989.74852
