US 11,757,368 B2
Transformer arrangement
Roberto Alves, Västerås (SE); Nan Chen, Västerås (SE); Frans Dijkhuizen, Skultuna (SE); Jan Svensson, Västerås (SE); and Alireza Nami, Västerås (SE)
Appl. No. 17/639,117
Filed by Hitachi Energy Switzerland AG, Baden (CH)
PCT Filed Dec. 18, 2020, PCT No. PCT/EP2020/087235
§ 371(c)(1), (2) Date Feb. 28, 2022,
PCT Pub. No. WO2021/123317, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 19218965 (EP), filed on Dec. 20, 2019.
Prior Publication US 2022/0407429 A1, Dec. 22, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H02M 5/12 (2006.01); H02M 7/483 (2007.01); H02M 1/34 (2007.01); H02M 1/42 (2007.01)
CPC H02M 5/12 (2013.01) [H02M 1/34 (2013.01); H02M 1/4233 (2013.01); H02M 7/4835 (2021.05)] 20 Claims
OG exemplary drawing
1. A transformer arrangement comprising:
a transformer with a primary and a secondary winding; and
a chain link of switching blocks connected to one of the secondary windings and connectable in series between said one of the windings and a load, said switching blocks comprising a first set of voltage contribution blocks and a second set of circuit breaker blocks, where the first set of voltage contribution blocks is configured to adjust a voltage output by the transformer with an offset voltage and the second set of circuit breaker blocks is configured to interrupt a current (Iload) running through the chain link, wherein at least some of the blocks are grouped into cells, each cell comprising at least one voltage contribution block and at least one circuit breaking block.