US 12,009,136 B2
Reactor
Kazuhiro Inaba, Yokkaichi (JP)
Assigned to AutoNetworks Technologies, Ltd., Yokkaichi (JP); Sumitomo Wiring Systems, Ltd., Yokkaichi (JP); and Sumitomo Electric Industries, Ltd., Osaka (JP)
Appl. No. 16/977,219
Filed by AutoNetworks Technologies, Ltd., Yokkaichi (JP); Sumitomo Wiring Systems, Ltd., Yokkaichi (JP); and Sumitomo Electric Industries, Ltd., Osaka (JP)
PCT Filed Mar. 1, 2019, PCT No. PCT/JP2019/008073
§ 371(c)(1), (2) Date Sep. 1, 2020,
PCT Pub. No. WO2019/168151, PCT Pub. Date Sep. 6, 2019.
Claims priority of application No. 2018-037481 (JP), filed on Mar. 2, 2018.
Prior Publication US 2021/0202150 A1, Jul. 1, 2021
Int. Cl. H01F 27/25 (2006.01); H01F 1/12 (2006.01); H01F 27/02 (2006.01); H01F 27/255 (2006.01); H01F 27/32 (2006.01); H01F 37/00 (2006.01); H01F 41/12 (2006.01)
CPC H01F 27/255 (2013.01) [H01F 1/12 (2013.01); H01F 27/022 (2013.01); H01F 27/32 (2013.01); H01F 37/00 (2013.01); H01F 41/12 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A reactor, comprising:
a coil including a winding portion;
a magnetic core including an inner core portion disposed inside the winding portion and an outer core portion disposed outside the winding portion; and
a resin mold portion that covers at least a portion of an outer circumferential surface of the outer core portion, wherein
the outer core portion includes:
a resin core portion made of a composite material including a soft magnetic powder and a resin; and
a first through-hole having a peripheral side completely bound by the outer core portion and extending through the resin core portion, and
a first end and a second end of the first through-hole open to a surface of the outer core portion other than a coil-facing surface that faces the coil, and the resin mold portion is inserted inside the first through-hole so as to be completely bound by the outer core portion; and
a joining surface where the inner core portion and the outer core portion join together, wherein
the inner core portion is made of a composite material including a soft magnetic powder and a resin, and includes a second through-hole that extends in a direction orthogonal to an axial direction of the winding portion through a portion of the inner core portion on the joining surface side,
the magnetic core includes a flow path groove for connecting an opening of the first through-hole and an opening of the second through-hole, and
the resin mold portion is inserted in the second through-hole via the flow path groove.