US 12,068,674 B2
Integrated inductor and a power conversion module including the integrated inductor
Haijun Yang, Shanghai (CN); Zengyi Lu, Shanghai (CN); and Lijun Zhou, Shanghai (CN)
Assigned to Delta Electronics (Shanghai) CO., LTD, Shanghai (CN)
Filed by Delta Electronics (Shanghai) CO., LTD, Shanghai (CN)
Filed on Jan. 31, 2022, as Appl. No. 17/588,402.
Application 16/450,089 is a division of application No. 15/414,702, filed on Jan. 25, 2017, granted, now 10,381,934, issued on Aug. 13, 2019.
Application 17/588,402 is a continuation in part of application No. 16/450,089, filed on Jun. 24, 2019, granted, now 11,349,400.
Claims priority of application No. 201610049254.1 (CN), filed on Jan. 25, 2016.
Prior Publication US 2022/0158562 A1, May 19, 2022
Int. Cl. H02M 1/00 (2007.01); H01F 27/24 (2006.01); H01F 27/30 (2006.01); H01F 27/38 (2006.01); H01F 37/00 (2006.01); H02M 3/158 (2006.01); H02M 3/00 (2006.01); H02M 3/335 (2006.01)
CPC H02M 1/0064 (2021.05) [H01F 27/24 (2013.01); H01F 27/306 (2013.01); H01F 27/38 (2013.01); H02M 3/1586 (2021.05); H01F 37/00 (2013.01); H02M 1/0043 (2021.05); H02M 3/01 (2021.05); H02M 3/335 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An integrated inductor, comprising:
a magnetic core, comprising:
an upper cover plate and a bottom cover plate, wherein the upper cover plate is disposed opposite to the bottom cover plate;
a first side column and a second side column, provided between the upper cover plate and the bottom cover plate; and
a first central column and a second central column, provided between the upper cover plate and the bottom cover plate, wherein the first central column and the second central column are disposed between the first side column and the second side column, and the first side column and the second side column align with the first central column and the second central column; and
a first winding and a second winding electrically coupled to each other in parallel, wherein the first winding is wound around the first central column, forming a first inductor, the second winding is wound around the second central column, forming a second inductor, each of the first winding and the second winding has a first terminal and a second terminal,
wherein a magnetic field generated by a reference current on the first central column has a first magnetic flux direction when the reference current flows from the first terminal of the first winding to the second terminal of the first winding, and a magnetic field generated by an identical reference current on the second central column has a second magnetic flux direction when the identical reference current flows from the first terminal of the second winding to the second terminal of the second winding, the second magnetic flux direction is the same as the first magnetic flux direction; and
wherein a first operating current flowing through the first winding has a first high-frequency current component, and a second operating current flowing through the second winding has a second high-frequency current component, and a phase difference is 180 degrees between the first high-frequency current component and the second high-frequency current component, fluxes generated by the first high-frequency current component and the second high-frequency current component at the first side column cancel each other, and fluxes generated by the first high-frequency current component and the second high-frequency current component at the second side column cancel each other, wherein the first side column and the second side column have the same cross sectional areas, and the first central column and the second central column have the same cross sectional areas, and a sum of the cross sectional areas of the first side column and the second side column is greater than or equal to ½ of a sum of the cross sectional areas of the first central column and the second central column.