Title :
Evaluation of high power foil-type air-core transformer by high-frequency flyback converter
Author :
Kiwaki, Hisakatsu ; Yamaguchi, Takashi
Author_Institution :
Dept. of Electr. Eng., Kyushu Sangyo Univ., Fukuoka, Japan
Abstract :
A novel foil-type scheme for air-core transformer windings is studied to simplify the windings assembling process. A 30 W class prototype transformer is evaluated using a 500 kHz flyback power converter in comparison with a conventional transformer using twisted-wire-type windings. An efficiency of 80% (1% lower than the twisted-type) was obtained by the prototype. An energy recovery circuit is also examined to improve the efficiency
Keywords :
DC-DC power convertors; assembling; equivalent circuits; foils; high-frequency transformers; power MOSFET; power transformer testing; transformer cores; transformer windings; 30 W; 500 kHz; 80 percent; HF; MOSFETs; air-core transformer windings; assembling; energy recovery circuit; flyback power converter; foil-type windings; twisted-wire-type windings; Assembly; Conductive films; Copper; MOSFET circuits; Power generation; Power transformer insulation; Prototypes; Pulse width modulation; Transformer cores; Wires;
Conference_Titel :
Power Electronics Specialists Conference, PESC '94 Record., 25th Annual IEEE
Conference_Location :
Taipei
Print_ISBN :
0-7803-1859-5
DOI :
10.1109/PESC.1994.373853
