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    MAGNETIC CORE COMPONENT AND CHIP INDUCTOR
    1.
    发明申请
    MAGNETIC CORE COMPONENT AND CHIP INDUCTOR 审中-公开

    公开(公告)号：US20180233268A1

    公开(公告)日：2018-08-16

    申请号：US15516411

    申请日：2015-09-18

    Applicant: NTN CORPORATION

    Inventor： Kayo SAKAI ,  Eiichirou SHIMAZU ,  Shinji MIYAZAKI ,  Takayuki ODA

    IPC: H01F27/255 ,  H01F27/26 ,  H01F27/28 ,  H01F27/06

    CPC classification number: H01F27/255 ,  H01F27/06 ,  H01F27/263 ,  H01F27/2823

    Abstract: To provide a magnetic core component capable of suppressing leakage flux while suppressing the number of molds required at the time of molding, and a chip inductor using the same. A magnetic core component (1) includes a winding shaft portion (1a) for winding a winding wire (4); is formed by joining two half-members (2, 3), which are magnetic bodies and have the same shape; includes a leg portion (1b) arranged at both ends of the winding shaft portion (1a) and a cover portion (1c) arranged across one end of the leg portions in parallel with the winding shaft portion (1a); and has a joining surface (1d) which is formed in the winding shaft portion (1a) and the cover portion (1c) and which is a surface non-perpendicular to an axial direction of the winding shaft portion (1a).

    MAGNETIC ELEMENT
    2.
    发明申请
    MAGNETIC ELEMENT 审中-公开

    公开(公告)号：US20180151284A1

    公开(公告)日：2018-05-31

    申请号：US15578194

    申请日：2016-05-25

    Applicant: NTN CORPORATION

    Inventor： Kayo SAKAI ,  Eiichirou SHIMAZU ,  Shougo KANBE ,  Takayuki ODA

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

    CPC classification number: H01F17/04 ,  B22F3/225 ,  H01F3/08 ,  H01F3/10 ,  H01F17/043 ,  H01F27/08 ,  H01F27/085 ,  H01F27/24 ,  H01F27/2823 ,  H01F2003/106

    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.

    MAGNETIC ELEMENT
    3.
    发明申请
    MAGNETIC ELEMENT 审中-公开

    公开(公告)号：US20170110233A1

    公开(公告)日：2017-04-20

    申请号：US15128893

    申请日：2015-03-18

    Applicant: NTN CORPORATION

    Inventor： Kayo SAKAI ,  Eiichirou SHIMAZU ,  Shinji MIYAZAKI ,  Takayuki ODA

    IPC: H01F27/255 ,  H01F27/28

    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.

    INDUCTOR AND PROTECTION CIRCUIT
    5.
    发明申请
    INDUCTOR AND PROTECTION CIRCUIT 审中-公开

    公开(公告)号：US20180061562A1

    公开(公告)日：2018-03-01

    申请号：US15561512

    申请日：2016-03-11

    Applicant: NTN CORPORATION

    Inventor： Shougo KANBE ,  Kayo SAKAI ,  Eiichirou SHIMAZU ,  Takayuki ODA

    IPC: H01F27/42 ,  H01F27/28 ,  H01F27/24 ,  H01F27/40 ,  H02H3/02

    CPC classification number: H01F27/42 ,  H01F17/043 ,  H01F27/24 ,  H01F27/28 ,  H01F27/38 ,  H01F27/402 ,  H01F37/00 ,  H02H3/025

    Abstract: To provide an inductor capable of suppressing decrease of inductance in large current without magnetically saturating a magnetic core in large current of several thousand amperes like serge current and to provide a protection circuit using the inductor. The inductor is formed of an iron-based magnetic core 3 having a main coil 2 therein. A short circuit coil 4 having a function of cancelling a magnetic field generated by application current applied to the main coil 2 and having a coil winding start and a coil winding end being short-circuited is arranged coaxially with the main coil 2 in the magnetic core 3. The magnetic core 3 has magnetic cores with the same shape abutted on an abutting face 5. The protection circuit has a circuit breaker connected between a direct current power source and a load, and a current limiting inductor is connected to the circuit breaker in series.

    INDUCTANCE ELEMENT RESIN CASE AND INDUCTANCE ELEMENT
    6.
    发明申请
    INDUCTANCE ELEMENT RESIN CASE AND INDUCTANCE ELEMENT 审中-公开

    公开(公告)号：US20180047492A1

    公开(公告)日：2018-02-15

    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

    CPC classification number: H01F27/02 ,  H01F27/022 ,  H01F27/24 ,  H01F27/26 ,  H01F37/00

    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.

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