Abstract:
본 발명은 종래의 페라이트 코어 모듈의 구조를 변경함으로써 출력을 향상시키고, 차량진행 방향의 휨에 의한 강도저하를 줄여 급전도로 중간 부분 표면에 발생하는 균열을 방지할 수 있는 효과가 있다. 이를 위해, 특히, 이격되게 배열되어 지반 하부로의 자속누설을 방지하는 복수개의 수평코어부; 수평코어부의 양 끝단부로부터 수평코어부의 상측 방향으로 연장되게 형성되어 외측면으로의 자속누설을 방지하는 복수개의 제 1수직코어부; 수평코어부의 중심 부분으로부터 수평코어부의 상측 방향으로 연장되게 형성되고 제 1수직코어부와 평행한 방향으로 배열된 적어도 2열의 제 2수직코어부; 및 복수개의 제 1수직코어부를 상호 연결하여 제 1수직코어부를 지지하는 제 1지지부;를 포함하는 것을 특징으로 하는 전기자동차의 급전장치용 페라이트 코어 구조체가 개시된다.
Abstract:
The present invention relates to the addition of carbonaceous material, advantageously in the form of carbon nanotubes, filled or otherwise and/or carbon nanotube fibres to magnetic substances such that the intrinsic magnetism of the magnetic substances is enhanced. The mixture so produced can, if required be fixed through the addition of suitable fixing mediums such as epoxy resin. The resulting fixed, nanotube enhanced, permanent magnets are suitable for use in applications beyond the scope of non-enhanced permanent magnets.
Abstract:
A method for preparing a ferrite magnet, wherein a ferrite having a hexagonal W type magneto-plumbite structure is added to a ferrite which has a hexagonal M type magneto-plumbite structure and in which a part of Sr, Ba, Pb or Ca has been substituted with La and optionally at least one element selected from among rare earth elements including Y and Bi during pulverization to a fine powder; and a ferrite magnet prepared by using the method. The above method which comprises the addition of a ferrite having a hexagonal W type magneto-plumbite structure to a ferrite having a hexagonal M type magneto-plumbite structure during the pulverization allows the preparation of a ferrite magnet having improved magnetic characteristics with the addition of a reduced amount of an element such as Co, Ni, Mn or Zn.
Abstract:
A method for preparing a ferrite magnet, wherein a ferrite having a spinel type structure is added to a ferrite which has a hexagonal M type magneto-plumpite structure and in which a part of Sr, Ba, Pb or Ca has been substituted with La and optionally at least one element selected from among rare earth elements including Y and Bi during pulverization to a fine powder; and a ferrite magnet prepared by using the method. The above method which comprises the addition of a ferrite having a spinel type structure to a ferrite having a hexagonal M type magneto-plumpite structure during the pulverization allows the preparation of a ferrite magnet having improved magnetic characteristics with the addition of a reduced amount of an element such as Co, Ni, Mn or Zn.
Abstract:
Disclosed herein are compositions and methods of making a hard magnetic material from iron oxide fines, the hard magnetic material having a general formula MFe x O y . In one aspect, the method comprises a) providing an iron oxide fine; b) providing a metal carbonate of a general formula M x (CO 3 ) y ; c) mixing the iron oxide fine and the metal carbonate to form a mixture; d) calcining the mixture of the iron oxide fine and the metal carbonate; wherein M is a divalent metal ion.
Abstract:
L'invention concerne un aimant fritté de forme annulaire possédant une orientation radiale du champ magnétique rémanent, comprenant : - une partie principale de forme annulaire réalisée dans un matériau ferromagnétique, dans lequel il est prévu un premier degré D1 d'anisotropie magnétique dans la direction radiale de l'aimant; et - une partie renfort de forme annulaire solidaire de la partie principale de l'aimant, la partie renfort étant réalisée dans le même matériau ferromagnétique que la partie principale, et dans lequel il est prévu un second degré D2 d'anisotropie magnétique dans la direction radiale de l'aimant, le degré D1 étant strictement supérieur au degré D2.
Abstract:
Disclosed herein is a sintered cobalt ferrite composite material comprising of nano and micron sized powders of cobalt ferrite with high magentostriction. The present invention further discloses preparation of nano and micron sized powders of cobalt ferrite, in particular, the auto combustion process using glycine as fuel for preparing nano sized cobalt ferrite powders.
Abstract:
The present invention relates to Y-type ferrite, and a ferrite molded product prepared therefrom, and more specifically, to Y-type ferrite which is represented by the following chemical formula 1 to have a high permeability and a low permeability loss in the high frequency band of 1 GHz or more, and thus can miniaturize various electronic devices and enables broadband if applied as a magnetic material of the electronic devices, and a ferrite molded product prepared therefrom. [Chemical formula 1] Ba2CoaZnbCucMndFe12O22 (wherein, a, b, c and d are a positive number, and 1.8 = a + b + c + d = 2.2).