US 11,967,448 B2
Planar transformer having heat sink
Dae Woo Lee, Incheon (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Motors Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Motors Corporation, Seoul (KR)
Filed on Nov. 30, 2020, as Appl. No. 17/107,752.
Claims priority of application No. 10-2020-0143028 (KR), filed on Oct. 30, 2020.
Prior Publication US 2022/0139605 A1, May 5, 2022
Int. Cl. H01F 27/24 (2006.01); H01F 27/22 (2006.01); H01F 27/28 (2006.01)
CPC H01F 27/22 (2013.01) [H01F 27/24 (2013.01); H01F 27/28 (2013.01); H01F 2027/2819 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A planar transformer comprising:
a primary printed circuit board (PCB) having at least a hole in which a first core and a second core are inserted and including a coil pattern;
a secondary PCB having at least a hole in which the first core and the second core are inserted and including a coil pattern; and
a heat dissipation plate disposed between the primary PCB and the secondary PCB and including at least a hole in which the first core and the second core are inserted,
wherein inner heights of the first core and the second core are larger than a sum of thicknesses of the primary PCB, the heat dissipation plate and the secondary PCB so that a leakage inductance of the planar transformer is adjusted by adjusting a thickness of the heat dissipation plate.