US 12,149,178 B2
Current balancing in power semiconductors of a DC/DC converter
Uwe Drofenik, Zürich (CH); Thomas Bernhard Gradinger, Aarau Rohr (CH); and Francisco Canales, Baden-Dättwil (CH)
Assigned to ABB SCHWEIZ AG, Baden (CH)
Appl. No. 17/753,961
Filed by ABB Schweiz AG, Baden (CH)
PCT Filed Sep. 18, 2020, PCT No. PCT/EP2020/076147
§ 371(c)(1), (2) Date Mar. 18, 2022,
PCT Pub. No. WO2021/053166, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 19198713 (EP), filed on Sep. 20, 2019.
Prior Publication US 2022/0345045 A1, Oct. 27, 2022
Int. Cl. H02M 3/335 (2006.01); H02M 1/00 (2006.01); H02M 3/00 (2006.01); H02M 7/48 (2007.01); H02M 7/493 (2007.01)
CPC H02M 3/33523 (2013.01) [H02M 1/0058 (2021.05); H02M 3/01 (2021.05); H02M 3/33571 (2021.05); H02M 3/33573 (2021.05); H02M 7/4815 (2021.05); H02M 7/493 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A DC/DC converter, comprising:
a first DC link;
a first plurality of N>1 converter bridges connected in parallel to the first DC link; and
a transformer, wherein the transformer has a primary side and a secondary side;
wherein the primary side of the transformer comprises a plurality of M>1 primary windings, each of the plurality of M>1 primary windings having a first and a second terminal;
wherein the first plurality of N>1 converter bridges further comprises a first plurality of N impedance elements and a second plurality of M impedance elements,
wherein for each converter bridge, respective impedance element of the first plurality of N impedance elements is connected between the converter bridge and a common node (C), and
wherein each of the second plurality of M impedance elements is connected between the common node and the first terminal of a respective primary winding of the plurality of M>1 primary windings,
wherein N is an integer multiple of a number M of paralleled primary windings of the transformer.