Title :
An improved zero-voltage and zero-current-switching full-bridge PWM converter using a simple resonant circuit
Author :
Seok, Kyoung-Wook ; Kwon, Bong-Hwan
Author_Institution :
Dept. of Electron. & Electr. Eng., Pohang Inst. of Sci. & Technol., South Korea
fDate :
12/1/2001 12:00:00 AM
Abstract :
An improved zero-voltage and zero-current-witching full-bridge pulsewidth modulation (ZVZCS-FB-PWM) DC-to-DC converter is presented and analyzed. An auxiliary resonant circuit, which consists of a switch and a capacitor, are added to provide zero-current switching (ZCS) conditions to the primary lagging-leg switches. Due to the auxiliary circuit, when the primary current is being extinguished, the voltage applied on the leakage inductance of the transformer is larger than DC-link voltage. This large voltage increases the maximal output current that can be handled in ZCS. Furthermore, the auxiliary switch softly turns on and turns off
Keywords :
DC-DC power convertors; PWM power convertors; bridge circuits; inductance; resonant power convertors; switching circuits; transformers; DC-link voltage; PWM DC/DC converter; ZCS; ZVS; auxiliary circuit; full-bridge PWM converter; leakage inductance; maximal output current; primary current extinguishing; primary lagging-leg switches; resonant circuit; zero-current-switching; zero-voltage switching; Capacitors; Filters; Inductance; Inductors; Pulse width modulation converters; RLC circuits; Resonance; Switches; Voltage; Zero current switching;
Journal_Title :
Industrial Electronics, IEEE Transactions on
