DC-to-DC converter having a secondary resonant circuit capacitor, and method for operating a DC-to-DC converter
AssigneeSiemens Energy Global GmbH & Co. KG
InventorsMichael Finkenzeller, Mirjam Mantel, Monika Poebl
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Abstract
A DC-to-DC converter includes a primary side of a transformer element of the DC-to-DC converter and a secondary side of the transformer element, the primary side having a first rectifier circuit and a primary-side resonant circuit and the secondary side having a second rectifier circuit and a secondary-side stored energy source, the transformer element being arranged between the primary side and the secondary side in order to transfer electrical energy, the secondary side having a secondary resonant circuit capacitor.
Claims6
A DC-DC voltage converter comprising:
- a primary side of a transformer element of the DC-DC voltage converter, and
- a secondary side of the transformer element, wherein a primary-side number of windings of the transformer element is designed to not be equal to a secondary-side number of windings of the transformer element,
- wherein the primary side has a first rectifier circuit and a primary-side resonant circuit and the secondary side has a second rectifier circuit and a secondary-side energy store, wherein the primary-side resonant circuit comprises a primary-side resonant circuit capacitor having a first capacitor value, a series primary inductance for leakage, and a parallel inductance,
- wherein the transformer element is arranged between the primary side and the secondary side in order to transmit electrical energy,
- wherein the secondary side energy store comprises a secondary-side resonant circuit capacitor, having a second capacitor value, and a series secondary inductance for leakage, the second capacitor value formed as a product of the first capacitor value and a quotient of the series primary inductance for leakage and the series secondary inductance for leakage, and
- wherein the series primary inductance for leakage and the parallel inductance for ZVS operation are integrated in the transformer element close to no-load operation, such that an inductor combination is formed.
A method for operating a DC-DC voltage converter having a primary side of a transformer element of the DC-DC voltage converter and having a secondary side of the transformer element, wherein the primary side is provided with a first rectifier circuit and a primary-side resonant circuit and the secondary side is provided with a second rectifier circuit and a secondary-side energy store, and wherein electrical energy is transmitted between the primary side and the secondary side, the method comprising:
- bidirectionally transmitting electrical energy from the primary side to the secondary side or from the secondary side to the primary side by means of a secondary-side resonant circuit capacitor, wherein a primary-side number of windings of the transformer element is designed to not be equal to a secondary-side number of windings of the transformer element,
- wherein the primary-side resonant circuit comprises a primary-side resonant circuit capacitor having a first capacitor value, a series primary inductance for leakage and a parallel inductance,
- wherein the secondary-side resonant circuit capacitor has a second capacitor value formed as a product of the first capacitor value and a quotient of the series primary inductance for leakage and a series secondary inductance for leakage, and
- integrating the series primary inductance for leakage and a parallel inductance for ZVS operation in the transformer element close to no-load operation, such that an inductor combination is formed.
Dependencies are inferred from the claim text.