-
公开(公告)号：US20210319935A1
公开(公告)日：2021-10-14
申请号：US16951729
申请日：2020-11-18
发明人： Do Hoon Kim , Hyung Ju Lee , Jae Hyuk Jang , Young Beom Kim , Dong Hwan Kim , Koon Seung Kong
摘要： Disclosed are a rare-earth permanent magnet having improved magnetic properties and a method of manufacturing the same.
A method of manufacturing a rare-earth permanent magnet may include: preparing a mixed powder including i) a first alloy represented by R1aR2bBcMdFebal and ii) a second alloy represented by R2bBcMdFebal where R1 is one or two or more of La, Ce, and Y; R2 is a rare-earth element except for La, Ce, and Y; and M is a metal element; press-forming and sintering the prepared mixed powder in a magnetic field to prepare a sintered body; and performing a heat treatment based on diffusion temperature conditions of an R1 component and an R2 component contained in the prepared sintered body.-
公开(公告)号：US11682506B2
公开(公告)日：2023-06-20
申请号：US16951729
申请日：2020-11-18
发明人： Do Hoon Kim , Hyung Ju Lee , Jae Hyuk Jang , Young Beom Kim , Dong Hwan Kim , Koon Seung Kong
CPC分类号： H01F1/0577 , B22F3/10 , B22F3/24 , B22F9/04 , C22C38/002 , C22C38/005 , H01F41/0266 , B22F2009/044 , B22F2301/355 , C22C2202/02
摘要： Disclosed are a rare-earth permanent magnet having improved magnetic properties and a method of manufacturing the same.
A method of manufacturing a rare-earth permanent magnet may include: preparing a mixed powder including i) a first alloy represented by R1aR2bBcMdFebal and ii) a second alloy represented by R2bBcMdFebal where R1 is one or two or more of La, Ce, and Y; R2 is a rare-earth element except for La, Ce, and Y; and M is a metal element; press-forming and sintering the prepared mixed powder in a magnetic field to prepare a sintered body; and performing a heat treatment based on diffusion temperature conditions of an R1 component and an R2 component contained in the prepared sintered body.-
公开(公告)号：US20220344082A1
公开(公告)日：2022-10-27
申请号：US17451721
申请日：2021-10-21
发明人： Seok Jin Ha , Sang Hwa Do , Kyoung Bum Kim , Nyeon Han Hong , Koon Seung Kong , Dong Hwan Kim , Sang Hyub Lee
摘要： Disclosed is a segmented magnet which may adjust the application direction of a heavy rare earth element for grain boundary diffusion depending on the magnetization direction of the segmented magnet so as to simplify the manufacturing process of the segmented magnet while reducing eddy current loss, and a method for manufacturing the same. The method includes preparing a plurality of permanent magnet parent bodies having a constant magnetization direction, diffusing a diffusion material into the prepared permanent magnet parent bodies via a pair of planes thereof opposite each other and parallel to the magnetization direction along grain boundaries so as to form a pair of diffusing surfaces, preparing a permanent magnet assembly by stacking the permanent magnet parent bodies in a line such that the diffusing surfaces thereof face each other, and segmenting the permanent magnet assembly into a plurality of pieces along planes perpendicular to the magnetization direction.
-
公开(公告)号：US20240006099A1
公开(公告)日：2024-01-04
申请号：US18140853
申请日：2023-09-22
发明人： Do Hoon KIM , Hyung Ju Lee , Jae Hyuk Jang , Young Beom Kim , Dong Hwan Kim , Koon Seung Kong
CPC分类号： H01F1/0577 , H01F41/0266 , B22F3/10 , B22F3/24 , C22C38/005 , C22C38/002 , B22F9/04 , B22F2009/044 , C22C2202/02 , B22F2301/355
摘要： Disclosed are a rare-earth permanent magnet having improved magnetic properties and a method of manufacturing the same.
A method of manufacturing a rare-earth permanent magnet may include: preparing a mixed powder including i) a first alloy represented by R1aR2bBcMdFebal and ii) a second alloy represented by R2bBcMdFebal where R1 is one or two or more of La, Ce, and Y; R2 is a rare-earth element except for La, Ce, and Y; and M is a metal element; press-forming and sintering the prepared mixed powder in a magnetic field to prepare a sintered body; and performing a heat treatment based on diffusion temperature conditions of an R1 component and an R2 component contained in the prepared sintered body.-
公开(公告)号：US09545899B2
公开(公告)日：2017-01-17
申请号：US13796131
申请日：2013-03-12
发明人： Jeong Seon Min , Yang Rae Cho , Chang Hyun Lee , Young Je Park , Eun Sik Kim , Dong Hwan Kim
摘要： Disclosed is a switch apparatus of a vehicle that includes a switch body that is connected to a connector of an electronic apparatus and includes a relay board disposed in an inner space thereof. The apparatus further includes a coupling portion disposed on a bottom of the switch body, formed by a conductor, and coupled to a fixation bracket. Additionally, an earth member includes a base formed by the conductor and is disposed in a lower part of the inner space of the switch body, and coupled on the top of the coupling portion and a clamping bar respectively extended upward at both sides of the base and coupled with an earth terminal formed on the bottom of the relay board.
摘要翻译： 公开了一种车辆的开关装置，其包括与电子设备的连接器连接并且包括设置在其内部空间中的中继板的开关体。 该装置还包括耦合部分，其设置在开关主体的底部上，由导体形成并联接到固定支架。 此外，地球构件包括由导体形成的基座，并且设置在开关主体的内部空间的下部，并且联接在联接部的顶部上，并且分别在底座的两侧向上延伸的夹紧杆 并且与形成在继电器板的底部上的接地端子耦合。
-
公开(公告)号：US20210335540A1
公开(公告)日：2021-10-28
申请号：US17092854
申请日：2020-11-09
发明人： Bo Kyeong Han , Dong Hwan Kim , Koon Seung Kong
摘要： Disclosed are a method of manufacturing a rare-earth permanent magnet capable of offsetting a partially uneven demagnetization by varying the amount of heavy rare-earth element diffused to a grain boundary for each region and a Nd—Fe—B-based permanent magnet manufactured by the same.
The method includes: preparing a base material including a plurality of regions by using a sintered magnet including an Nd—Fe—B-based alloy; preparing a coating material including a heavy rare-earth element; applying the coating material to a surface of the base material; and diffusing the heavy rare-earth element to a grain boundary of the base material by heat-treating the base material to which the coating material is applied. In the applying the coating material, an amount of the coating material applied to each region of the base material may vary.-
公开(公告)号：US20140183013A1
公开(公告)日：2014-07-03
申请号：US13796131
申请日：2013-03-12
发明人： Jeong Seon Min , Yang Rae Cho , Chang Hyun Lee , Young Je Park , Eun Sik Kim , Dong Hwan Kim
IPC分类号： H01H9/00
摘要： Disclosed is a switch apparatus of a vehicle that includes a switch body that is connected to a connector of an electronic apparatus and includes a relay board disposed in an inner space thereof. The apparatus further includes a coupling portion disposed on a bottom of the switch body, formed by a conductor, and coupled to a fixation bracket. Additionally, an earth member includes a base formed by the conductor and is disposed in a lower part of the inner space of the switch body, and coupled on the top of the coupling portion and a clamping bar respectively extended upward at both sides of the base and coupled with an earth terminal formed on the bottom of the relay board.
摘要翻译： 公开了一种车辆的开关装置，其包括与电子设备的连接器连接并且包括设置在其内部空间中的中继板的开关体。 该装置还包括耦合部分，其设置在开关主体的底部上，由导体形成并联接到固定支架。 此外，地球构件包括由导体形成的基座，并且设置在开关主体的内部空间的下部，并且联接在联接部的顶部上，并且分别在底座的两侧向上延伸的夹紧杆 并且与形成在继电器板的底部上的接地端子耦合。
-
公开(公告)号：US11897034B2
公开(公告)日：2024-02-13
申请号：US16975838
申请日：2018-09-13
发明人： Dong Hwan Kim , Koon Seung Kong
CPC分类号： B22F3/16 , B22F3/24 , B22F9/04 , C22C28/00 , H01F1/0571 , H01F41/0266 , B22F2003/248 , B22F2009/044 , B22F2202/05 , B22F2301/45 , C22C2202/02
摘要： There is provided a method for manufacturing a rare earth sintered magnet by many times repetitively finely pulverizing a rare earth alloy on a jet mill by supplying high-pressure nitrogen gas to narrow grain size distribution to make an easy alignment in a magnetic field, and by micronizing crystal grains by using a hydrogenation-disproportionation-desorption-recombination (HDDR) process, to improve the coercivity and thermostability of the rare earth sintered magnet.
-
公开(公告)号：US11915861B2
公开(公告)日：2024-02-27
申请号：US16975886
申请日：2018-09-13
发明人： Dong Hwan Kim , Koon Seung Kong
CPC分类号： H01F41/0293 , B22F3/16 , B22F3/24 , B22F9/04 , C22C38/005 , B22F2003/248 , B22F2009/044 , B22F2201/10 , B22F2201/20 , B22F2202/05 , B22F2301/355 , B22F2304/10 , C22C2202/02 , H02K1/02
摘要： There is provided a method for manufacturing a rare earth sintered magnet having a stable magnetic performance, by uniformly distributing a heavy rear earth element to the surface of the magnet and the grain boundary inside of the magnet by using a mixture of a heavy rare earth compound or a heavy rare earth metal alloy and a rare earth magnet powder, to lower a decrease rate of the magnetic characteristics based on the temperature of the rare earth sintered magnet.
-
公开(公告)号：US11527356B2
公开(公告)日：2022-12-13
申请号：US16441251
申请日：2019-06-14
发明人： Koon Seung Kong , Dong Hwan Kim
摘要： A method for producing a heavy rare earth grain-boundary-diffused RE-Fe—B-based rare earth magnet and a heavy rare earth grain-boundary-diffused RE-Fe—B-based rare earth magnet produced thereby is disclosed. More particularly, a method for producing a heavy rare earth grain-boundary-diffused RE-Fe—B-based rare earth sintered magnet having a reduced content of a heavy rare earth element is disclosed, in which a hydrogen compound of a heavy rare earth is mainly used as a diffusion material in the production of the grain-boundary-diffused magnet so that a product having uniform and stable quality can be produced. The coercive force of the magnet can be increased while minimizing the amount of heavy rare earth used in the production of the grain-boundary-diffused magnet, by solving the problem that the heavy rare earth is not uniformly diffused into the magnet, and a heavy rare earth grain-boundary-diffused RE-Fe—B-based rare earth magnet produced thereby.
-
-
-
-
-
-
-
-
-
搜索结果
24 条记录 (耗时 0.032 秒)
