Title :
On the high-speed switching of the free-run DC-to-DC converter with a saturating core
Author :
Harada, Koosuke ; Sakamoto, Hiroshi ; Shoyama, Masahito
Author_Institution :
Kyushu University, Fukuoka 812, JAPAN
Abstract :
The turn-off mechanism of the new free-run DC-to-DC converter with a saturating core is analyzed. This converter has a simple construction of the transistor core multivibrator, in which the current feedback is applied to the main switching transistor, and the voltage feedback is applied to the control transistor. The core flux changes along the minor hysteresis loop. The turn-off time is extremely shortened by the resonance between the base-emitter capacitance of the transistor and the saturated inductance of the current feedback transformer. As a result, the efficiency of 94% is obtained with the switching frequency of 400kHz.
Keywords :
Capacitance; Equivalent circuits; Switches; Switching frequency; Transformer cores; Transistors; Voltage control;
Conference_Titel :
Power Electronics Specialists conference, 1982 IEEE
Conference_Location :
Cambridge, MA, USA
DOI :
10.1109/PESC.1982.7072392
