公开(公告)号：US20150287524A1

公开(公告)日：2015-10-08

申请号：US14600144

申请日：2015-01-20

Applicant: Hitachi, Ltd.

Inventor： Yasunori ONO ,  Takahide MATSUO ,  Naoya MIYAMOTO ,  Hideki OGATA ,  Kenichi KAWAMURA

IPC: H01F27/36 ,  H01F27/245 ,  H01F27/26

CPC classification number: H01F27/365 ,  H01F27/245 ,  H01F27/263

Abstract: A loss in iron core clamping structures and a tank, which is caused by a leakage magnetic flux from a winding between the iron core clamping structures is reduced. In a transformer including an iron core having legs and yokes, windings wound around the legs, and ion core clamping structures arranged above and below the windings to fixedly clamp the iron core, a magnetic shield made of a material high in magnetic permeability is arranged between ends of the iron core clamping structures and the windings on a high voltage side and a low voltage side. The magnetic shield is held by a mounting member held by the ends of the iron core clamping structures in the axial direction thereof.

Abstract translation: 减少了由铁芯夹持结构之间的绕组泄漏的磁通量引起的铁芯夹紧结构和罐的损失。 在包括具有腿和轭的铁芯，缠绕在腿上的绕组和布置在绕组上方和下方的离子芯夹持结构以固定夹紧铁芯的变压器中，由导磁率高的材料制成的磁屏蔽布置在 铁心夹紧结构的端部和绕组在高压侧和低压侧。 磁屏蔽被由铁芯夹持结构的端部沿其轴向保持的安装构件保持。

公开(公告)号：US20170301454A1

公开(公告)日：2017-10-19

申请号：US15485855

申请日：2017-04-12

Applicant: HITACHI, LTD.

Inventor： Li LU ,  Kenichi KAWAMURA ,  Hiroshi MIYAO ,  Hiroshi MORITA ,  Satoshi ICHIMURA ,  Jun NUKAGA ,  Shinji FUJITA ,  Kohei YAMAGUCHI ,  Hideki OGATA ,  Masato SUZUKI

IPC: H01F27/28

CPC classification number: H01F27/289 ,  H01F27/2823 ,  H01F27/2871 ,  H01F27/2876 ,  H01F27/323

Abstract: A stationary induction electrical apparatus includes a disc winding having a structure in which a flow path for a cooling medium is provided between coils where a low voltage is generated between shield wires, an L-shaped insulation barrier is provided between coils where a high voltage is generated between the shield wires, a horizontal portion of the L-shaped insulation barrier is provided so as to closely contact an upper surface or a lower surface of the disc coil, a tip end portion in an axial direction of the L-shaped insulation barrier is provided so as to closely contact an inner surface of the disc coil which is adjacent to a pressboard insulation cylinder, and a height of the tip end portion in the axial direction is lower than a thickness of one coil.

公开(公告)号：US20140211528A1

公开(公告)日：2014-07-31

申请号：US14159530

申请日：2014-01-21

Applicant: HITACHI, LTD.

Inventor： Shigenori INOUE ,  Shuji KATOH ,  Yasuhiro KIYOFUJI ,  Makoto KADOWAKI ,  Hiroyuki FUJITA ,  Hideki OGATA

IPC: H02M7/797

CPC classification number: H02M7/797 ,  H02J3/36 ,  H02M2007/4835 ,  Y02E60/60

Abstract: A power conversion apparatus including a three-phase transformer having at least four three-phase windings, and three converter arms each configured by connecting one or plural unit converters each including a switching device and an energy storage element in series. A power source or a load is connected to a first three-phase winding of the transformer, three series circuits which connects second and third three-phase windings of the transformer, and the converter arms in series with each other are connected in parallel, the parallel connection point is a DC terminal, and a magnitude relationship between a coupling coefficient of the first and second three-phase windings, and a coupling coefficient of the first three- and third three-phase windings is equal to a magnitude relationship between a coupling coefficient of the fourth and second three-phase windings, and a coupling coefficient of the fourth and the third three-phase windings.

Abstract translation: 一种电力转换装置，包括具有至少四个三相绕组的三相变压器，以及三个转换臂，其通过将包括开关装置和能量存储元件的一个或多个单元转换器串联连接而构成。 电源或负载连接到变压器的第一三相绕组，连接变压器的第二和第三三相绕组的三个串联电路和彼此串联的转换器臂并联连接， 并联连接点是DC端子，并且第一和第三三相绕组的耦合系数与第一三和三相绕组的耦合系数之间的大小关系等于耦合的大小关系 第四和第三三相绕组的系数，以及第四和第三三相绕组的耦合系数。