Zero-voltage and zero-current-switching full bridge PWM converter for high-power applications
- Korea Electrotechnology Research Inst., Changwon (Korea, Republic of). Power Electronics Div.
- Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)
A novel zero-voltage and zero-current-switching (ZVZCS) full-bridge (FB) pulse-width modulated (PWM) converter is proposed. The new converter overcomes the limitations of the zero-voltage-switching (ZVS)-FB-PWM converter, such as high circulating energy, loss of duty cycle, and limited ZVS load range for the lagging-leg switches. By using the dc blocking capacitor and adding a saturable inductor, the primary current during the freewheeling period is reduced to zero, allowing the lagging-leg switches to be operated with zero-current-switching (ZCS). Meanwhile, the leading-leg switches are still operated with ZVS. The new converter is attractive for high-voltage (400--800 V), high-power (2--10 kW) applications where IGBT`s are predominantly used as the power switches. The principle of operation, features, and design considerations of the new converter are described and verified on a 2-kW, 100-kHz, IGBT-based experimental circuit.
- OSTI ID:
- 276227
- Journal Information:
- IEEE Transactions on Power Electronics, Vol. 11, Issue 4; Other Information: PBD: Jul 1996
- Country of Publication:
- United States
- Language:
- English
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