公开(公告)号：US10090095B2

公开(公告)日：2018-10-02

申请号：US15485855

申请日：2017-04-12

申请人： HITACHI, LTD.

发明人： Li Lu ,  Kenichi Kawamura ,  Hiroshi Miyao ,  Hiroshi Morita ,  Satoshi Ichimura ,  Jun Nukaga ,  Shinji Fujita ,  Kohei Yamaguchi ,  Hideki Ogata ,  Masato Suzuki

IPC分类号： H01F27/06 ,  H01F27/12 ,  H01F21/12 ,  H01F27/28 ,  H01F27/32

摘要： 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：US09252684B2

公开(公告)日：2016-02-02

申请号：US14159530

申请日：2014-01-21

申请人： HITACHI, LTD.

发明人： Shigenori Inoue ,  Shuji Katoh ,  Yasuhiro Kiyofuji ,  Makoto Kadowaki ,  Hiroyuki Fujita ,  Hideki Ogata

IPC分类号： H02J3/36 ,  H02M7/797 ,  H02M7/483

CPC分类号： H02M7/797 ,  H02J3/36 ,  H02M2007/4835 ,  Y02E60/60

摘要： 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.

摘要翻译： 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。