Direct current link circuit
First Claim
1. A method comprising:
- connecting, through a resonant circuit, a direct current power source alternatively across;
a positive output terminal of a dual direct current output and a neutral terminal during a first portion of a switching cycle, wherein the first portion of the switching cycle comprises a first switched-on-period that corresponds to one half of a resonant period of the resonant circuit; and
a negative output terminal of the dual direct current output and the neutral terminal during a second portion of the switching cycle, wherein the second portion of the switching cycle comprises a second switched-on-period that corresponds to another half of the resonant period associated with the resonant circuit.
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Accused Products
Abstract
A device for converting power from a floating source of DC power to a dual direct current (DC) output, the device includes: positive and negative input terminals connectable to the floating source of DC power; and positive and negative, and ground output terminals connectable to the dual DC output that may feed an inverter. The inverter may be either a two or three level inverter. A charge storage device may be connected in parallel to, and charged from, the positive and negative input terminals. A resonant circuit may be also connected between the charge storage device and the dual DC output. The resonant circuit may include an inductor connected in series with a capacitor. The charge storage device may discharge through the resonant circuit by switching through to either the negative output terminal or the positive output terminal.
1122 Citations
20 Claims
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1. A method comprising:
connecting, through a resonant circuit, a direct current power source alternatively across; a positive output terminal of a dual direct current output and a neutral terminal during a first portion of a switching cycle, wherein the first portion of the switching cycle comprises a first switched-on-period that corresponds to one half of a resonant period of the resonant circuit; and a negative output terminal of the dual direct current output and the neutral terminal during a second portion of the switching cycle, wherein the second portion of the switching cycle comprises a second switched-on-period that corresponds to another half of the resonant period associated with the resonant circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 16, 17, 18, 19)
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8. An apparatus comprising:
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input terminals including a positive input terminal and a negative input terminal; output terminals including a positive output terminal and a negative output terminal; a resonant circuit; and switches adapted to connect, through the resonant circuit, the input terminals alternatively across; the positive output terminal and a neutral node during a first portion of a switching cycle, wherein the first portion of the switching cycle comprises a first switched-on-period that corresponds to one half of a resonant period associated with the resonant circuit; and the negative output terminal and the neutral node during a second portion of the switching cycle, wherein the second portion of the switching cycle comprises a second switched-on-period that corresponds to another half of the resonant period associated with the resonant circuit. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 20)
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Specification