Electric power conversion systems – Current conversion
Reexamination Certificate
2007-06-06
2009-10-06
Sterrett, Jeffrey L (Department: 2838)
Electric power conversion systems
Current conversion
C363S017000, C363S124000, C363S142000
Reexamination Certificate
active
07599196
ABSTRACT:
Methods and systems for transforming electric power between two or more portals. Any or all portals can be DC, single phase AC, or multi-phase AC. Conversion is accomplished by a plurality of bi-directional conducting and blocking semiconductor switches which alternately connect an inductor and parallel capacitor between said portals, such that energy is transferred into the inductor from one or more input portals and/or phases, then the energy is transferred out of the inductor to one or more output portals and/or phases, with said parallel capacitor facilitating “soft” turn-off, and with any excess inductor energy being returned back to the input. Soft turn-on and reverse recovery is also facilitated. Said bi-directional switches allow for two power transfers per inductor/capacitor cycle, thereby maximizing inductor/capacitor utilization as well as providing for optimum converter operation with high input/output voltage ratios. Control means coordinate the switches to accomplish the desired power transfers.
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patent: 5500791 (1996-03-01), Kheraluwala et al.
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Ehsani et al., “Inverse Dual Converter (IDC) for High-Power DC-DC Applications”, IEEE Transactions on Power Electronics, vol. 8, No. 2, Apr. 1993, pp. 216-223.
Kheraluwala, et al., “Performance Characterization of a High-Power Dual Active Bridge dc-to-dc Converter”, IEEE Transactions on Industry Applications, vol. 28, No. 6, Nov./Dec. 1992, pp. 1294-1301.
Finch, III Fred E
Groover & Associates
Ideal Power Converters, Inc.
Sterrett Jeffrey L
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