US 12,243,678 B2
Leakage transformer
Junichi Kotani, Hyogo (JP); Osamu Moriya, Nara (JP); Hisayoshi Kato, Osaka (JP); and Toshiyuki Asahi, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/441,437
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Mar. 13, 2020, PCT No. PCT/JP2020/011271
§ 371(c)(1), (2) Date Sep. 21, 2021,
PCT Pub. No. WO2020/203197, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-069213 (JP), filed on Mar. 29, 2019.
Prior Publication US 2022/0189687 A1, Jun. 16, 2022
Int. Cl. H01F 5/00 (2006.01); H01F 27/26 (2006.01); H01F 27/28 (2006.01); H01F 38/08 (2006.01)
CPC H01F 38/08 (2013.01) [H01F 27/26 (2013.01); H01F 27/2804 (2013.01); H01F 2027/2809 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A leakage transformer comprising:
a core including a first magnetic leg and a second magnetic leg arranged to be spaced from the first magnetic leg; and
a printed wiring board including an insulating portion and conductor wiring, wherein:
the conductor wiring includes:
a first coil composed of a first winding, the first coil being wound around the first magnetic leg but not wound around the second magnetic leg; and
a second coil composed of a second winding,
the second coil includes:
a first part wound around the first magnetic leg but not wound around the second magnetic leg; and
a second part wound around both the first magnetic leg and the second magnetic leg,
the core further includes two or more other magnetic legs different from the first magnetic leg and the second magnetic leg,
the two or more other magnetic legs include:
a third magnetic leg adjacent to the first magnetic leg; and
a fourth magnetic leg adjacent to the second magnetic leg, and
no wire is fully wound around the third magnetic leg, and no wire is fully wound around the fourth magnetic leg.