Title :
Non-resonant converter for megahertz switching
Author :
Harada, Koosuke ; Sakamoto, Hiroshi
Author_Institution :
Dept. of Electron., Kyushu Univ., Fukuoka, Japan
Abstract :
A novel method of zero-voltage switching for DC-to-DC converters is presented. The method is based on commutation with the aid of an inductor, where a short interval (dead time) with both switches off is provided for removing the current surge. The zero-voltage-switching condition is made independent of the duty ratio control by introducing control of the current-ripple constant using a saturable core. The output is produced by a separate circuit. With this method of switching, a DC-to-DC converter of 90% efficiency with switching frequency of about 1 MHz is achieved using PWM (pulse-width-modulated) control
Keywords :
commutation; power convertors; switching; 1 MHz; 90 percent; DC-to-DC converters; commutation; current-ripple constant; duty ratio control; nonresonant convertors; zero-voltage switching; Circuits; DC-DC power converters; Inductors; Pulse width modulation; Pulse width modulation converters; Surges; Switches; Switching converters; Switching frequency; Zero voltage switching;
Conference_Titel :
Power Electronics Specialists Conference, 1989. PESC '89 Record., 20th Annual IEEE
Conference_Location :
Milwaukee, WI
DOI :
10.1109/PESC.1989.48574
