Title :
Self-commutated auxiliary circuit ZVT PWM converters
Author :
Martins, Mário Lúcio da Silva ; Hey, Hélio Leães
Author_Institution :
Power Electron. & Control Res. Group, Fed. Univ. of Santa Maria, Brazil
Abstract :
This paper introduces a novel class of zero voltage transition (ZVT) DC/DC pulse-width modulation (PWM) converters that use a resonant inductance-capacitance (L-C) circuit connected to the auxiliary switch, which is termed a self-commutated auxiliary circuit. It provides a simple and reliable means of achieving zero-current conditions (ZCS) for auxiliary switch commutations under wide line and load ranges, without the inclusion of any kind of DC voltage source. Furthermore, this auxiliary circuit is placed in parallel with the main power converter, retaining the ZVT characteristics. The self-commutated auxiliary circuit ZVT PWM boost is analyzed, and its feasibility and reliability are confirmed by experimental results obtained from laboratory prototypes rated at 1 kW and 100 kHz.
Keywords :
DC-DC power convertors; PWM power convertors; circuit resonance; reliability; switching convertors; zero current switching; zero voltage switching; 1 kW; 100 kHz; L-C circuit; ZCS; ZVT PWM converter; auxiliary switch; pulse-width modulation converter; resonant inductance-capacitance circuit; self-commutated auxiliary circuit; voltage transition DC/DC converter; Pulse circuits; Pulse width modulation; Pulse width modulation converters; RLC circuits; Resonance; Switches; Switching circuits; Switching converters; Zero current switching; Zero voltage switching; 211;DC converters; 65; DC&#; ZVT; zero voltage transition;
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2004.836644
