HIGH GAIN DC TRANSFORMER
1 Assignment
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Accused Products
Abstract
A DC-DC power converter circuit (20) is provided for transferring power between low voltage terminals and high voltage terminals. The circuit comprises an inductor (Lr) and a capacitor (Cr) provided across the low voltage terminals, the capacitor being provided in parallel with the high voltage terminals. The circuit further comprises a plurality of switches (T1 to T4) for switching the polarity of the capacitor in the circuit, and a controller for controlling the switching of the capacitor to repeatedly switch the polarity of the capacitor at a switching frequency f, such that, in use, and other than at the instant of switching, the switched capacitor produces an increasing voltage at the high voltage side of the inductor. A connection device (D2) is provided for repeatedly connecting the high voltage terminals to the switched capacitor at substantially the switching frequency f to enable current flow between the switched capacitor and the high voltage terminals.
7 Citations
37 Claims
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1-17. -17. (canceled)
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18. A DC-DC power converter circuit for transferring power between low voltage terminals and high voltage terminals, the circuit comprising:
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an inductor and a capacitor provided across the low voltage terminals, the capacitor being provided in parallel with the high voltage terminals; a plurality of switches for switching the polarity of the capacitor in the circuit; and a controller for controlling the switching of the capacitor to repeatedly switch the polarity of the capacitor at a switching frequency f, such that, in use, and other than at the instant of switching, the switched capacitor produces an increasing voltage at the high voltage side of the inductor. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A DC-DC power converter circuit for transferring power between low voltage terminals and high voltage terminals, the circuit comprising:
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an inductor and a capacitor provided in series across the low voltage terminals, the capacitor being provided in parallel with the high voltage terminals, and configured into an electronic bridge circuit comprising a plurality of switches whereby the polarity of said capacitor with respect to said low or high voltage terminals can be changed; a controller for selectively actuating said switches so as to repeatedly switch the polarity of the capacitor with respect to the high voltage terminals at a predetermined cycling frequency; and a connection device for repeatedly connecting the high voltage terminals to the switched capacitor at substantially said cycling frequency to enable current flow between the switched capacitor and the high voltage terminals. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification