US 12,431,279 B2
Electrical arrangement with a transformer for transmitting signals from a primary side to a secondary side
Roman Roggendorf, Bad Oeynhausen (DE)
Assigned to WAGO Verwaltungsgesellschaft mit beschrankter Haftung, Minden (DE)
Filed by WAGO Verwaltungsgesellschaft mit beschrankter Haftung, Minden (DE)
Filed on Jul. 15, 2021, as Appl. No. 17/376,966.
Claims priority of application No. 10 2020 118 708.4 (DE), filed on Jul. 15, 2020.
Prior Publication US 2022/0020525 A1, Jan. 20, 2022
Int. Cl. H01F 27/28 (2006.01); H05K 1/02 (2006.01); H05K 1/18 (2006.01)
CPC H01F 27/2804 (2013.01) [H01F 27/2885 (2013.01); H05K 1/0218 (2013.01); H05K 1/18 (2013.01); H01F 2027/2809 (2013.01); H05K 2201/1003 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An electrical circuitry with a printed circuit board built up in parallel layers, comprising:
a shield having a shield opening;
a transformer for transmitting signals from a primary side to a secondary side with a first coil winding, a second coil winding, and a third coil winding, the first coil winding forming the primary side of the transformer and the second and third coil windings forming the secondary side of the transformer, wherein the printed circuit board has at least one first layer and the second and third coil windings are arranged within the first layer and wherein the circuit board has at least one second layer and the first coil winding is arranged in the second layer, the first coil winding being vertically aligned with at least a portion of the second coil winding and with at least a portion of the third coil winding when the second coil winding and the third coil winding are in horizontal alignment, the second coil winding being spaced apart from the third coil winding; and
a magnetic conductor comprising two parts that are in horizontal alignment when the second coil winding and the third coil winding are in horizontal alignment, each of the two parts being separate from each other and each having a first leg, a second leg, and a third leg that are each spaced apart from each other, the second coil winding being wound around the first leg of each of the two parts but not wound around the second leg of the two parts, the third coil winding being wound around the third leg of each of the two parts but not wound around the second leg of the two parts, and the first coil winding being wound around the second leg of each of the two parts but not wound around the first leg or the third leg of the two parts, wherein the two parts of the magnetic conductor are at least partially disposed within the shield opening so as to be encircled by the shield,
wherein the circuit board has openings which are penetrated by the legs of the two parts of the magnetic conductor,
wherein the magnetic conductor, the shield, and the transformer are magnetically coupled, and
wherein the shield is a potential-free shield.