Zero-voltage-zero-current switching in high-output-voltage full-bridge PWM converters using the interwinding capacitance

TitleZero-voltage-zero-current switching in high-output-voltage full-bridge PWM converters using the interwinding capacitance
Publication TypeJournal Article
Year of Publication1999
AuthorsGarabandic, D., W. G. Dunford, and M. Edmunds
JournalPower Electronics, IEEE Transactions on
Pagination343 -349
Date Publishedmar.
Keywords1.2 kW, 2 kW, 600 to 1000 V, 600 V, 62.5 kHz, bridge circuits, DC-DC power convertors, DC/DC power conversion, full-bridge PWM power converter, IGBTs, insulated gate bipolar transistors, interwinding capacitance, MCTs, passive-to-active leg transistors, power bipolar transistors, power semiconductor switches, power transformers, primary-side inductor, PWM power convertors, ringing reduction, switching circuits, transformer windings, turn-off, turn-on, zero-current-switching, zero-voltage-switching

A novel zero-voltage and zero-current-switching (ZVZCS) full-bridge (FB) pulsewidth-modulated (PWM) power converter is proposed. The new converter uses the interwinding capacitance and a small primary-side inductor to achieve a zero-current-zero-voltage turn off and a zero-current turn on of the passive-to-active leg transistors. The turn off of the active-to-passive leg transistors is with zero voltage, and the turn on is with zero voltage and zero current across them. The ringing caused by the parasitic interwinding capacitance and by the reverse recovery of the rectifiers is reduced. The new converter is attractive for high-output-voltage applications (600-1000 V), where the interwinding capacitance is sufficiently dominant. In addition, switches such as insulated gate bipolar transistors (IGBTs) and MCTs can be used at higher frequencies which is particularly desirable for high-power application (above 2 kW). The experimental results obtained from an IGBT-based 62.5-kHz DC/DC power converter with a rated output voltage of 600 V and a nominal power of 1.2 kW are presented


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