Opposed current power converter
First Claim
1. Power converter comprising a pair of switches, each of said switches being connected between two constant voltage sources and an output node common to each of said switches, said output node being adapted for connection to a load, and modulating means for opening and closing said switches in a sequence wherein said switches are concurrently activated to cause the electrical currents controlled by said switches to pass through said switches in opposition to one another, said electrical currents being summed at said output node.
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Accused Products
Abstract
A power converter includes a pair of switches, each of the switches being connected between positive and negative constant DC voltage sources and a common output node which is connected to a load. A modulator opens and closes the switches in a sequence in which the electrical current controlled by the switches are in opposition to one another at the common output node, and are summed at the output node. The modulator includes a triangle wave generator and comparators which are connected to an error amplifier to provide a bearing switching voltage to the comparators. The comparators switch the control switches in response to the triangle wave generated by the triangle wave generator increasing above and decreasing below the reference levels. Underlap and overlap of the converter is controlled by varying of the DC bias level of the triangle wave.
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Citations
19 Claims
- 1. Power converter comprising a pair of switches, each of said switches being connected between two constant voltage sources and an output node common to each of said switches, said output node being adapted for connection to a load, and modulating means for opening and closing said switches in a sequence wherein said switches are concurrently activated to cause the electrical currents controlled by said switches to pass through said switches in opposition to one another, said electrical currents being summed at said output node.
- 11. Full bridge power converter comprising a high side half bridge and a low side half bridge, each of said half bridges including a pair of switches, each switch of each half bridge being connected between constant voltage sources and an output node common to each switch of each half bridge, the output node of the half bridges being adapted for connection to said load, and modulating means for opening and closing said switches of said half bridges in a sequence wherein said switches are concurrently activated to cause the electrical currents controlled by said switches of each half bridge to pass through said switches in opposition to one another, said electrical currents being summed at the corresponding output node of each half bridge.
- 15. Method for operating a power converter comprising the steps of connecting voltage sources to a common output node through switches connecting each of said voltage sources to said output node, and opening and closing said switches in a sequence wherein said switches are concurrently activated to cause the electrical currents controlled by the switches to pass through said switches in opposition to one another and summing said currents at said output node.
Specification