US 12,003,182 B2
DC-to-DC converter having a secondary resonant circuit capacitor, and method for operating a DC-to-DC converter
Michael Finkenzeller, Feldkirchen-Westerham (DE); Mirjam Mantel, Haar (DE); and Monika Poebl, Munich (DE)
Assigned to Siemens Energy Global GmbH & Co. KG, Bayern (DE)
Appl. No. 17/439,698
Filed by Siemens Energy Global GmbH & Co. KG, Bayern (DE)
PCT Filed Feb. 17, 2020, PCT No. PCT/EP2020/054036
§ 371(c)(1), (2) Date Sep. 15, 2021,
PCT Pub. No. WO2020/187513, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 19164288 (EP), filed on Mar. 21, 2019.
Prior Publication US 2022/0166328 A1, May 26, 2022
Int. Cl. H02M 3/335 (2006.01); H02M 1/00 (2006.01); H02M 3/00 (2006.01)
CPC H02M 3/33584 (2013.01) [H02M 1/0058 (2021.05); H02M 3/01 (2021.05); H02M 3/33573 (2021.05)] 6 Claims
OG exemplary drawing
 
1. 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.