US 11,721,472 B2
Coil component, circuit board, and power supply device
Xiaoguang Zheng, Osaka (JP); Kazushi Kusawake, Osaka (JP); and Masayoshi Hirota, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 16/648,266
Filed by SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed Aug. 22, 2018, PCT No. PCT/JP2018/031031
§ 371(c)(1), (2) Date Mar. 18, 2020,
PCT Pub. No. WO2019/082489, PCT Pub. Date May 2, 2019.
Claims priority of application No. JP2017-206159 (JP), filed on Oct. 25, 2017.
Prior Publication US 2020/0227200 A1, Jul. 16, 2020
Int. Cl. H01F 27/28 (2006.01); H01F 27/26 (2006.01); H01F 30/12 (2006.01)
CPC H01F 27/26 (2013.01) [H01F 27/28 (2013.01); H01F 30/12 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A coil component used for two-phase transformer coupling, the coil component comprising:
a first coil and a second coil; and
a magnetic core at which the first coil and the second coil are provided,
wherein
the magnetic core comprises:
a first magnetic leg at which the first coil is provided, the first magnetic leg comprising first divided core pieces;
a second magnetic leg at which the second coil is provided, the second magnetic leg comprising second divided core pieces;
a central leg portion interposed between the first magnetic leg and the second magnetic leg;
a pair of connection portions connecting the first magnetic leg, the central leg portion, and the second magnetic leg in parallel;
a main gap interposed in the central leg portion;
a first gap interposed in the first magnetic leg; and
a second gap interposed in the second magnetic leg,
the main gap, the first gap, and the second gap have a relationship where a coupling coefficient between the first coil and the second coil is greater than 0.7,
the first divided core pieces are spaced from each other in accordance with a first gap length,
the second divided core pieces are spaced from each other in accordance with a second gap length, and
each of the first gap length and the second gap length is shorter than a gap length of the main gap.