Zero current switching

Electricity: power supply or regulation systems – In shunt with source or load – Using a three or more terminal semiconductive device

Reexamination Certificate

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C323S235000, C323S290000

Reexamination Certificate

active

07960950

ABSTRACT:
A method for providing non-resonant zero-current switching in a switching power converter operating in a continuous current mode. The switching power converter converts power from input power to output power. The switching power converter includes a main switch connected to a main inductor, wherein an auxiliary inductor is connectible with the main inductor. The main current flows from an input to an output. The auxiliary inductor is connected with the main inductor thereby charging the auxiliary inductor so that an auxiliary current flows from the output to the input opposing the main current. Upon a total current including a sum of the main current and the auxiliary current. substantially equals or approaches zero, the switch is turned on.

REFERENCES:
patent: 7782031 (2010-08-01), Qiu et al.
patent: PCT/IB2009/051221 (2009-03-01), None
Baggio J E: “Quasi-ZVS active auxiliary commutation circuit for two switches forward converter” 32nd Annual IEEE Power Electronics Specialists Conference. PESC 2001. Conference Proceedings. Vancouver, Canada, Jun. 17-21, 2001; [Annual Power Electronics Specialists Conference] New York, NY: IEEE, US.
Ilic M: “Interleaved Zero-Current-Transition Buck Converter” IEEE Transactions on Industry Applications, IEEE Service Center, Piscataway, NJ, US, vol. 43, No. 6, Nov. 1, 2007, pp. 1619-1627, XP011197477 ISSN: 0093-9994 pp. 1619-1622.
Dong Ho Lee: “Novel zero-voltage-transition and zero-current-transition pulse-width-modulation converters” Power Electronics Specialists Conference, 1997. PESC '97 Record., 28th Annual IEEE St. Louis, MO, USA Jun. 22-27, 1997, New York, NY, USA IEEE, US, vol. 1, Jun. 22, 1997, pp. 233-239, XP010241553 ISBN: 978-0-7803-3840-1 p. 233-p. 236.
Internation Search Report and Opinion of International Patent application PCT/2009/051221, Oct. 19, 2009.

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