US 11,948,722 B2
Planar winding transformer
Yen-Shin Lai, New Taipei (TW); Yong-Yi Huang, New Taipei (TW); Chun-Hung Lee, New Taipei (TW); and Hao-Chieh Chang, New Taipei (TW)
Assigned to CHICONY POWER TECHNOLOGY CO., LTD., New Taipei (TW); and NATIONAL TAIPEI UNIVERSITY OF TECHNOLOGY, Taipei (TW)
Filed by CHICONY POWER TECHNOLOGY CO., LTD., New Taipei (TW); and NATIONAL TAIPEI UNIVERSITY OF TECHNOLOGY, Taipei (TW)
Filed on Jan. 8, 2021, as Appl. No. 17/144,835.
Claims priority of application No. 109132176 (TW), filed on Sep. 17, 2020.
Prior Publication US 2022/0084737 A1, Mar. 17, 2022
Int. Cl. H01F 27/28 (2006.01); H01F 27/24 (2006.01); H01F 27/42 (2006.01)
CPC H01F 27/2804 (2013.01) [H01F 27/24 (2013.01); H01F 27/42 (2013.01); H01F 2027/2809 (2013.01); H01F 2027/2819 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A planar winding transformer, comprising:
a magnetic core set comprising:
a first magnetic core and a second magnetic core, which are parallel to each other, and
only two magnetic columns, which comprise a first magnetic column and a second magnetic column, which are disposed between the first magnetic core and the second magnetic core; and
a plurality of sub-transformers disposed between the first magnetic core and the second magnetic core, wherein a number of the sub-transformers is 2N, N is a natural number and greater than or equal to 2, the sub-transformers are constituted by a plurality of multilayer circuit boards, the multilayer circuit boards are stacked between the first magnetic core and the second magnetic core, the first magnetic column and the second magnetic column penetrate through the multilayer circuit boards, and each of the multilayer circuit boards comprises:
a first low voltage winding layer,
a second low voltage winding layer connected in parallel with the first low voltage winding layer, and
a high voltage winding layer disposed between the first low voltage winding layer and the second low voltage winding layer;
wherein, when the high voltage winding layer receives a polarity current, the first low voltage winding layer and/or the second low voltage winding layer generate a corresponding induced current, and the first magnetic core, the second magnetic core, the first magnetic column and the second magnetic column form a closed path for magnetic flux.