公开(公告)号：US10074471B2

公开(公告)日：2018-09-11

申请号：US15128893

申请日：2015-03-18

Applicant: NTN CORPORATION

Inventor： Kayo Sakai ,  Eiichirou Shimazu ,  Shinji Miyazaki ,  Takayuki Oda

IPC: H01F27/02 ,  H01F27/255 ,  H01F3/10 ,  H01F37/00 ,  H01F27/28 ,  H01F17/04 ,  H01F1/147

CPC classification number: H01F27/255 ,  H01F1/14733 ,  H01F1/14791 ,  H01F3/10 ,  H01F17/043 ,  H01F27/2823 ,  H01F37/00 ,  H01F2003/106

Abstract: The present invention provides a magnetic element in which iron loss-caused heat generation is restrained and which can be produced with a high productivity. The magnetic element has a magnetic body which allows a magnetic flux generated by a coil (4) to pass therethrough. The magnetic body is a combined body formed by combining two halves, of the magnetic body composed of the compression molded and injection molded bodies, obtained by bisection made in an axial direction of the coil with each other. A compression molded magnetic body (2) is disposed at a portion generating iron loss-caused heat to a high extent or a portion inferior in heat dissipation performance. An injection molded magnetic body (3) is disposed at a portion other than the portion where the compression molded magnetic body is disposed. The compression molded and injection molded magnetic bodies are combined with each other.

公开(公告)号：US11145450B2

公开(公告)日：2021-10-12

申请号：US15761105

申请日：2016-09-16

Applicant: NTN CORPORATION

Inventor： Kayo Sakai

IPC: H01F27/24 ,  H01F3/08 ,  H01F3/10 ,  H01F27/30 ,  H01F17/04 ,  H01F27/02 ,  H01F27/28 ,  H01F41/02

Abstract: To provide a magnetic element capable of reducing working man hour, the number of components, and an amount of a copper wire. A magnetic element 1 is provided with a coil assembly 4 including a core 2 formed by a compression molded magnetic body and a coil 3 wound on an outer periphery of the core 2, and an outer peripheral core 5 that surrounds an outer periphery of the coil assembly 4. The outer peripheral core 5 is formed by an injection molded magnetic body and includes an opening 5a into which the coil can be inserted, and a pair of grooves 5b into which both end portions in an axial direction of the core 2, the groove 5b being provided as a fixing unit for fixing the coil assembly 4 in the outer peripheral core and formed on an inner peripheral surface of the outer peripheral core.

公开(公告)号：US10650951B2

公开(公告)日：2020-05-12

申请号：US15578194

申请日：2016-05-25

Applicant: NTN CORPORATION

Inventor： Kayo Sakai ,  Eiichirou Shimazu ,  Shougo Kanbe ,  Takayuki Oda

IPC: H01F27/08 ,  H01F17/04 ,  H01F3/10 ,  H01F27/24 ,  B22F3/22 ,  H01F27/28 ,  H01F3/08

Abstract: To provide a magnetic element such as a pot-shaped inductor in which a coil is covered by a magnetic body, having excellent cooling performance and being capable of suppressing heat generation. An inductor 1 as the magnetic element is provided with a coil formed by winding a winding wire, a magnetic body 2 in which the coil 5 is arranged and which transmits magnetic flux generated by the coil 5. The magnetic body 2 includes an air-cooling portion for air-cooling the magnetic element, on a magnetic body outer diameter portion which covers an outer diameter side of the coil 5. The air cooling portion is formed of a slit 7 as a hole structure penetrating the magnetic body outer diameter portion. Further, in a configuration in which the coil is sealed by a sealing resin, the magnetic body includes a flow control path, which controls a flow of the resin in filling the sealing resin, on a surface facing the coil.

公开(公告)号：US10586643B2

公开(公告)日：2020-03-10

申请号：US15554422

申请日：2016-02-24

Applicant: NTN CORPORATION

Inventor： Kayo Sakai ,  Eiichirou Shimazu ,  Takayuki Oda

IPC: H01F27/02 ,  H01F27/24

Abstract: The present invention facilitates positioning of contact surfaces of a resin case, core gap management, and assembling processing. A resin case 1 can house at least one magnetic core selected from a U-shaped magnetic core, a UU-shaped magnetic core, a UR-shaped magnetic core, and an I-shaped magnetic core. The resin case 1 is used for an inductance element in which a coil is arranged around the magnetic core so as to house the magnetic core. The resin case is an assembly of a plurality of divided members with the same shape. A recess and a projection A1, A2 mutually fitted complementary to each other are formed on end surfaces of the divided members contacted with each other.