Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Reexamination Certificate
2006-04-24
2008-08-05
Patel, Rajnikant (Department: 2838)
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
C363S017000
Reexamination Certificate
active
07408794
ABSTRACT:
A circuit and method of providing three dc voltage buses and transforming power between a low voltage dc converter and a high voltage dc converter, by coupling a primary dc power circuit and a secondary dc power circuit through an isolation transformer; providing the gating signals to power semiconductor switches in the primary and secondary circuits to control power flow between the primary and secondary circuits and by controlling a phase shift between the primary voltage and the secondary voltage. The primary dc power circuit and the secondary dc power circuit each further comprising at least two tank capacitances arranged in series as a tank leg, at least two resonant switching devices arranged in series with each other and arranged in parallel with the tank leg, and at least one voltage source arranged in parallel with the tank leg and the resonant switching devices, said resonant switching devices including power semiconductor switches that are operated by gating signals. Additional embodiments having a center-tapped battery on the low voltage side and a plurality of modules on both the low voltage side and the high voltage side are also disclosed for the purpose of reducing ripple current and for reducing the size of the components.
REFERENCES:
patent: 6370050 (2002-04-01), Peng et al.
Su, Gui-Jia, “A Low Cost, Triple-Voltage Bus DC/DC Converter for Automotive Applications,” Oak Ridge National Laboratory, managed by UT-Battelle, LLC.
Boyle Fredrickson , S.C.
Patel Rajnikant
UT-Battele LLC
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