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公开(公告)号：US09976874B2
公开(公告)日：2018-05-22
申请号：US14904223
申请日：2014-07-02
申请人： NTN CORPORATION
发明人： Toru Takahashi , Tatsuo Nakajima , Hiroyuki Hakamata , Ikuo Uemoto , Shinji Miyazaki , Takuji Harano , Takayuki Oda
CPC分类号： G01D5/14 , G01D5/24438 , G01D5/2452 , G01D5/246
摘要： A magnetic encoder device (3) of the present invention includes a base portion (33) having a mounting surface (33b) for mounting to a rotary shaft (2), a cored bar (35) fitted and fixed over the base portion (33), and a double-row magnetic encoder track (30) formed on the cored bar (35). Through movement of each of magnetic poles of the magnetic encoder track (30) over a region opposed to a magnetic sensor (4), an angle of the rotating rotary shaft is detected. The base portion (33) is formed of a sintered metal, and the mounting surface (33b) is subjected to sizing.
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公开(公告)号：US10074471B2
公开(公告)日：2018-09-11
申请号：US15128893
申请日：2015-03-18
申请人： NTN CORPORATION
发明人： Kayo Sakai , Eiichirou Shimazu , Shinji Miyazaki , Takayuki Oda
CPC分类号： H01F27/255 , H01F1/14733 , H01F1/14791 , H01F3/10 , H01F17/043 , H01F27/2823 , H01F37/00 , H01F2003/106
摘要： 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.
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公开(公告)号：US10650951B2
公开(公告)日：2020-05-12
申请号：US15578194
申请日：2016-05-25
申请人： NTN CORPORATION
发明人： Kayo Sakai , Eiichirou Shimazu , Shougo Kanbe , Takayuki Oda
摘要： 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.
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公开(公告)号：US10586643B2
公开(公告)日：2020-03-10
申请号：US15554422
申请日：2016-02-24
申请人： NTN CORPORATION
发明人： Kayo Sakai , Eiichirou Shimazu , Takayuki Oda
摘要： 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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