Cell Based DC/DC Converter
First Claim
1. A DC/DC converter comprisinga first conversion branch stretching between a first and a second DC terminal,a first controllable voltage source in a first half of the first conversion branch,a second controllable voltage source in a second half of the first conversion branch,a conversion unit converting between AC and DC and at one end connected to a third and a fourth DC terminal, anda transformer witha primary winding connected in a first interconnecting branch stretching between a first junction at which the first and second controllable voltage sources are connected to each other and a first potential that lies in the middle between the potentials of the first and second DC terminal, anda secondary winding connected to another end of the conversion unit,whereinthe first controllable voltage source is made up of a first group of series-connected cells and the second voltage source is made up of a second group of series-connected cells, where each cell is controllable to provide a voltage contribution in the conversion branch, andthe first and second voltage sources are controllable to provide a common-mode DC voltage to the first and second DC terminals and a differential mode AC voltage to said junction.
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Accused Products
Abstract
A DC/DC converter including a first conversion branch stretching between a first and a second DC terminal, a first controllable voltage source in a first half of the first conversion branch, a second controllable voltage source in a second half of the first conversion branch, a conversion unit converting between AC and DC and at one end connected to a third and a fourth DC terminal, and a transformer with a primary winding connected in a first interconnecting branch stretching between a first junction at which the first and second controllable voltage sources are connected to each other and a first potential that lies in the middle between the potentials of the first and second DC terminal, and a secondary winding connected to another end of the conversion unit.
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Citations
14 Claims
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1. A DC/DC converter comprising
a first conversion branch stretching between a first and a second DC terminal, a first controllable voltage source in a first half of the first conversion branch, a second controllable voltage source in a second half of the first conversion branch, a conversion unit converting between AC and DC and at one end connected to a third and a fourth DC terminal, and a transformer with a primary winding connected in a first interconnecting branch stretching between a first junction at which the first and second controllable voltage sources are connected to each other and a first potential that lies in the middle between the potentials of the first and second DC terminal, and a secondary winding connected to another end of the conversion unit, wherein the first controllable voltage source is made up of a first group of series-connected cells and the second voltage source is made up of a second group of series-connected cells, where each cell is controllable to provide a voltage contribution in the conversion branch, and the first and second voltage sources are controllable to provide a common-mode DC voltage to the first and second DC terminals and a differential mode AC voltage to said junction.
- 11. The DC/DC converter according to claim 11, further comprising a second capacitor bank connected between the third and fourth DC terminals and where the secondary winding of the transformer is connected between said second junction and this second capacitor bank midpoint.
Specification