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公开(公告)号：US20210111604A1
公开(公告)日：2021-04-15
申请号：US17015687
申请日：2020-09-09
Applicant: TDK Corporation
Inventor： Toshio TOMONARI , Noritaka CHIYO , Koji MITAKE , Toshihiro KUROSHIMA
Abstract: A rotating electrical machine includes a stator, a rotor with a permanent magnet, a first number of one or more first coils, and a second number of one or more second coils. The second number is different from the first number. The one or more first coils are disposed on the stator. The one or more second coils are disposed on the rotor. The one or more first coils and the one or more second coils are disposed on the stator and the rotor, respectively, in such a manner as to closely oppose each other in a state where the rotor is at a predetermined rotation angle position. The one or more first coils are arranged to induce a voltage in response to a relative position with respect to the one or more second coils.
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Patent Agency Ranking
公开(公告)号：US20190255618A1
公开(公告)日：2019-08-22
申请号：US16278876
申请日：2019-02-19
Applicant: TDK Corporation
Inventor： Takeshi MASUDA , Taeko TSUBOKURA , Hiroshi MIYASAKA , Yutaka HATAKEYAMA , Toshihiro KUROSHIMA
Abstract: A method of processing a rare earth magnet comprises: a step of irradiating an R-T-B-based rare earth magnet with laser light to process; and a step of performing heat treatment on the magnet after the irradiating. The heat treatment includes: a step A of bringing the temperature of the magnet to 400° C. or less, a step B of holding the magnet at a temperature T1 in a range of 400 to 700° C. after the step A, and a step C of bringing the temperature of the magnet to less than 400° C. after the step B. The temperature of the magnet is made not to exceed 700° C. between the step A and the step B. The temperature of the magnet is made not to exceed 700° C. between the step B and the step C. A step of setting the magnet at a temperature higher than 700° C. after the step C is not included.
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公开(公告)号：US20210067010A1
公开(公告)日：2021-03-04
申请号：US17005909
申请日：2020-08-28
Applicant: TDK Corporation
Inventor： Toshio TOMONARI , Noritaka CHIYO , Koji MITAKE , Toshihiro KUROSHIMA
Abstract: A magnet temperature information output device is disposed on a rotating electrical machine including a stator and a rotor with a permanent magnet, and is arranged to output temperature information regarding a temperature of the permanent magnet. The magnet temperature information output device includes an element arranged to detect a magnetic flux and output an electrical signal responding to the detected magnetic flux as the temperature information. The element is disposed on the stator.
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公开(公告)号：US20190115125A1
公开(公告)日：2019-04-18
申请号：US16159764
申请日：2018-10-15
Applicant: TDK Corporation
Inventor： Taeko TSUBOKURA , Takeshi MASUDA , Toshihiro KUROSHIMA
Abstract: The present invention provides a magnet structure comprising a first magnet, a second magnet, and an intermediate layer joining the first magnet and the second magnet. In the magnet structure, each of the first magnet and the second magnet is a permanent magnet comprising a rare earth element R, a transition metal element T, and boron B. In addition, the rare earth element R comprises: a light rare earth element RL comprising at least Nd; and a heavy rare earth element RH, and the transition metal element T comprises Fe, Co, and Cu. Further, the intermediate layer comprises: an RL oxide phase comprising an oxide of the light rare earth element RL; and an RL—Co—Cu phase comprising the light rare element RL, Co, and Cu.
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公开(公告)号：US20210280345A1
公开(公告)日：2021-09-09
申请号：US17186770
申请日：2021-02-26
Applicant: TDK Corporation
Inventor： Taeko TSUBOKURA , Toshihiro KUROSHIMA , Koji MITAKE , Takeshi MASUDA
Abstract: A magnet structure includes a first sintered magnet, a second sintered magnet, and an intermediate layer disposed between the first sintered magnet and the second sintered magnet. Each of the first sintered magnet and the second sintered magnet independently includes crystal grains containing a rare earth element, a transition metal element, and boron. The intermediate layer contains rare earth element oxide phases and crystal grains containing a rare earth element, transition metal element, and boron. Each of the transition metal elements independently includes Fe or a combination of Fe and Co. An average coverage factor of the rare earth element oxide phases measured on the basis of a cross section perpendicular to the intermediate layer of the magnet structure is within a range of 10% to 69%.
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公开(公告)号：US20150334885A1
公开(公告)日：2015-11-19
申请号：US14710831
申请日：2015-05-13
Applicant: TDK CORPORATION
Inventor： Toshio TOMONARI , Hirohumi ASOU , Toshihiro KUROSHIMA
CPC classification number: H05K9/0083 , C23C18/165 , C23C18/31 , H05K9/0075 , H05K9/0084 , H05K9/0088 , Y10T428/24314 , Y10T428/31678 , Y10T428/31681
Abstract: A magnetism suppressing sheet is provided with a metallic foil formed by plating and a magnetic film formed by applying magnetic metal powder-containing resin paste to one main surface of the metallic foil. A manufacturing method of a magnetism suppressing sheet includes the steps of preparing a support film on which a metallic foil has been formed, and forming a magnetic film by applying a magnetic metal powder-containing paste to one main surface of the metallic foil.
Abstract translation: 磁阻抑制片设置有通过电镀形成的金属箔和通过在金属箔的一个主表面上涂覆含有磁性金属粉末的树脂膏形成的磁性膜。 磁抑制片的制造方法包括以下步骤：制备其上形成有金属箔的支撑膜，并通过在金属箔的一个主表面上涂覆含金属粉末的糊状物形成磁性膜。
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