公开(公告)号：US20230386728A1

公开(公告)日：2023-11-30

申请号：US18203397

申请日：2023-05-30

Applicant: Hitachi, Ltd.

Inventor： Chie KOBAYASHI ,  Naoyuki KURITA ,  Kohei YAMAGUCHI ,  Mizuki OGI

IPC: H01F27/25 ,  H01F27/34 ,  H01F41/02

CPC classification number: H01F27/25 ,  H01F27/34 ,  H01F41/0226

Abstract: Provided is a core for a stationary electromagnetic apparatus, in which a compressive stress load in the laminating direction of amorphous thin strips that form an amorphous core is suppressed so that noise generated by magnetostrictive vibration is reduced while maintaining a space factor of the amorphous core. The core for a stationary electromagnetic apparatus 10 according to the present invention includes: a laminated body 1 formed of amorphous metal thin strips; and a holding member 2 that holds the laminated body 1, in which a width b of the holding member 2 is equal to or more than a width a of the laminated body 1 in a laminating direction.

公开(公告)号：US20160172095A1

公开(公告)日：2016-06-16

申请号：US14965085

申请日：2015-12-10

Applicant: Hitachi, Ltd.

Inventor： Takahiro SATAKE ,  Koji SASAKI ,  Chie KOBAYASHI

IPC: H01F27/25

CPC classification number: H01F27/25 ,  H01F27/263 ,  H01F27/306

Abstract: A wound core for stationary induction apparatus is provided that includes a wound core body, the core body being configured with laminated metal ribbons and provided in an upright manner, and a uniting binder provided on the outer circumference of the wound core body more sparsely toward the upper portion of the core body.

Abstract translation: 提供了一种用于固定式感应装置的卷绕芯，其包括卷绕的芯体，芯体由层叠的金属带构成，并且以垂直方式设置，并且在卷绕的芯体的外周上更加稀疏地朝向 芯体的上部。

公开(公告)号：US20180204669A1

公开(公告)日：2018-07-19

申请号：US15861731

申请日：2018-01-04

Applicant: Hitachi, Ltd.

Inventor： Chie KOBAYASHI ,  Naoyuki KURITA ,  Akira YAMAGISHI

IPC: H01F27/34 ,  H01F27/25 ,  H01F27/245 ,  H01F3/04 ,  H01F3/14 ,  H01F3/02 ,  H01F27/26

CPC classification number: H01F27/34 ,  H01F3/02 ,  H01F3/04 ,  H01F3/10 ,  H01F3/14 ,  H01F27/245 ,  H01F27/2455 ,  H01F27/25 ,  H01F27/263 ,  H01F41/0226 ,  H01F41/0233 ,  H01F2003/106

Abstract: An object of the present invention is to improve a mechanical strength and to ensure a low magnetic loss without using a supporting member even when amorphous ribbons are used for an inner core. To attain the object, a stationary induction apparatus core of the present invention includes an inner core formed from the amorphous ribbons and outer cores formed from silicon steel sheets, the outer cores being disposed on two sides of the inner core in a depth direction as opposed to a standing direction of the inner core in such a manner as to sandwich the inner core therebetween.

公开(公告)号：US20180350492A1

公开(公告)日：2018-12-06

申请号：US15777068

申请日：2015-11-18

Applicant: Hitachi, Ltd.

Inventor： Akira NISHIMIZU ,  Naoyuki KURITA ,  Chie KOBAYASHI ,  Hisashi MOROOKA

IPC: H01F3/04 ,  H01F41/02

CPC classification number: H01F27/24

Abstract: Generation of broken pieces of thin magnetic ribbons is reduced with respect to a joint part of an iron core, which is formed by laminating the thin magnetic ribbons, of a stationary induction apparatus. There is provided an iron core joint structure of the stationary induction apparatus characterized such that in a butt joint part of the iron core, which is configured with the laminated thin magnetic ribbons, of the stationary induction apparatus, a first resin penetrated into the laminated magnetic ribbons is applied to each of butt joint surfaces facing each other, and a second resin is further applied to an outer side of the first resin.

公开(公告)号：US20180233267A1

公开(公告)日：2018-08-16

申请号：US15879055

申请日：2018-01-24

Applicant: Hitachi, Ltd.

Inventor： Chie KOBAYASHI ,  Akira NISHIMIZU ,  Naoyuki KURITA ,  Akira YAMAGISHI

IPC: H01F27/25 ,  H01F27/26 ,  H01F27/245

CPC classification number: H01F27/25 ,  H01F3/10 ,  H01F27/245 ,  H01F27/263 ,  H01F2003/106

Abstract: The invention provides a core for a stationary induction apparatus including an amorphous core formed of an amorphous thin magnetic strip arranged inside the core, a silicon steel sheet core formed of a silicon steel sheet arranged on a side surface of the amorphous core, a wear plate arranged on the outermost peripheral surface of the silicon steel sheet core, an amorphous core frame arranged around the amorphous core including a space between the amorphous core and the silicon steel sheet core, and a support frame which supports and fixes the amorphous core and the silicon steel sheet core via the wear plate.

公开(公告)号：US20150054524A1

公开(公告)日：2015-02-26

申请号：US14451141

申请日：2014-08-04

Applicant: Hitachi, Ltd.

Inventor： Chie KOBAYASHI ,  Toshiaki ROKUNOHE ,  Yoshiharu WADA ,  Go KOBAYASHI ,  Ken OBAYASHI

IPC: G01R31/12 ,  G01R31/14 ,  G01R31/40

CPC classification number: G01R31/1227

Abstract: A partial discharge measurement device according to the present invention includes a frequency separation unit for separating a partial discharge signal which occurs in an apparatus under diagnosis and is detected by a sensor into the partial discharge signal and a main circuit voltage phase signal, an arithmetic device which receives the partial discharge signal and the main circuit voltage phase signal separated by the frequency separation unit and calculates a partial discharge signal synchronized with a main circuit voltage based on the partial discharge signal and the main circuit voltage phase signal, a power supply device for extracting a voltage obtained by dividing the main circuit voltage and supplying a power supply voltage to the arithmetic device, and a control unit for issuing an instruction for powering on or off at least the arithmetic device to the power supply device.

Abstract translation: 根据本发明的局部放电测量装置包括：频率分离单元，用于将在诊断中发生的并且由传感器检测到的局部放电信号分离成局部放电信号和主电路电压相位信号;运算器件 其接收由频率分离单元分离的局部放电信号和主电路电压相位信号，并且基于部分放电信号和主电路电压相位信号计算与主电路电压同步的局部放电信号;电源装置， 提取通过划分主电路电压而获得的电压并将电源电压提供给运算装置;以及控制单元，用于向至少一个运算装置发送接通或关闭供电装置的指令。