High power charge pump with inductive elements
First Claim
1. A DC-DC converter, comprising an input DC-link, an output DC-link, the output DC-link connected to the input DC-link by a circuit arrangement comprising at least a storage capacitor, a DC-link capacitor, and at least one controllable switching arrangement, with the controllable switching arrangement adapted to connect at least one of the storage capacitor and DC-link capacitor and/or the input DC-link to the output DC-link, wherein an inductive element is serially connected immediately in front of the storage capacitor and both the storage capacitor and the inductive element are adapted to form a resonant circuit and wherein the circuit arrangement comprises a further DC-link capacitor serially connected to the DC-link capacitor, and permanently connected with the input DC-link and with the at least one controllable switching arrangement, the at least one controllable switching arrangement adapted to alternatively connect the further DC-link capacitor or the input DC-link to the storage capacitor, with a switching frequency of the at least one controllable switching arrangement and the resonance frequency of the resonant circuit being essentially equal.
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Accused Products
Abstract
A high power unidirectional or bidirectional charge pump with inductive elements for high power DC-DC converter applications. Inductive elements resonating with storage capacitors allow zero current switching processes. Storage elements in the form of capacitors instead of conventional inductors allow a cheap and lightweight construction. The output voltage cannot be actively regulated and corresponds to a fraction of the input voltage. However, several voltage ratios can be easily obtained between output and input, such as 0.25, 0.33, 0.5, 0.75, 1.25, 1.33, 1.5, 2, 3, and 4.
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Citations
15 Claims
- 1. A DC-DC converter, comprising an input DC-link, an output DC-link, the output DC-link connected to the input DC-link by a circuit arrangement comprising at least a storage capacitor, a DC-link capacitor, and at least one controllable switching arrangement, with the controllable switching arrangement adapted to connect at least one of the storage capacitor and DC-link capacitor and/or the input DC-link to the output DC-link, wherein an inductive element is serially connected immediately in front of the storage capacitor and both the storage capacitor and the inductive element are adapted to form a resonant circuit and wherein the circuit arrangement comprises a further DC-link capacitor serially connected to the DC-link capacitor, and permanently connected with the input DC-link and with the at least one controllable switching arrangement, the at least one controllable switching arrangement adapted to alternatively connect the further DC-link capacitor or the input DC-link to the storage capacitor, with a switching frequency of the at least one controllable switching arrangement and the resonance frequency of the resonant circuit being essentially equal.
Specification