公开(公告)号：US20200018804A1

公开(公告)日：2020-01-16

申请号：US16457099

申请日：2019-06-28

Applicant: Hitachi Metals, Ltd.

Inventor： Ken OKUYAMA ,  Naoki FUTAKUCHI ,  Yujiro TOMITA

IPC: G01R33/09 ,  G01R15/20 ,  G01R19/00

Abstract: An electric current sensor includes a plate-like shape bus bar, through which an electric current to be detected is to be passed, one pair of shield plates, which are made of a magnetic material and disposed in such a manner as to sandwich the bus bar between the one pair of the shield plates in a thickness direction of the bus bar, a magnetic detection element, which is disposed between the bus bar and one of the shield plates to detect a strength of a magnetic field to be produced by the electric current to be passed through the bus bar, a core, which is made of a magnetic material and disposed between the one pair of the shield plates, and a winding, which includes one part wound around the core, and an other part wound around either of the shield plates.

公开(公告)号：US20190187187A1

公开(公告)日：2019-06-20

申请号：US16208890

申请日：2018-12-04

Applicant: Hitachi Metals, Ltd.

Inventor： Jun UMETSU ,  Naoki FUTAKUCHI ,  Haruyasu KOMANO ,  Ken OKUYAMA ,  Yujiro TOMITA

IPC: G01R19/00 ,  G01R1/04 ,  G01R15/20 ,  H01R25/16

CPC classification number: G01R19/0092 ,  G01R1/04 ,  G01R15/207 ,  H01R25/16

Abstract: A current sensor includes a bus bar in which a current to be detected flows, a circuit board mounted with a magnetic detection element thereon to detect a strength of a magnetic field generated by a current flowing in the bus bar, and a housing including first and second housings provided in such a manner as to sandwich the bus bar and the circuit board therebetween in a plate thickness direction of the bus bar. The first and second housings include slide guide portions respectively which are relatively slidable in a sloping direction with respect to the plate thickness direction of the bus bar while abutting each other in the plate thickness direction of the bus bar.

公开(公告)号：US20190170793A1

公开(公告)日：2019-06-06

申请号：US16157192

申请日：2018-10-11

Applicant: Hitachi Metals, Ltd.

Inventor： Ken OKUYAMA ,  Naoki FUTAKUCHI ,  Haruyasu KOMANO ,  Jun UMETSU ,  Yujiro TOMITA

IPC: G01R15/20 ,  G01R33/09 ,  G01R33/025 ,  G01R19/00 ,  G01R15/14

Abstract: A current sensor includes first and second bus bars aligned and arranged in such a manner to be spaced from each other in a plate width direction, a third bus bar arranged in such a manner that a plate thickness direction thereof coincides with a plate thickness direction of the first and second bus bars and a length direction thereof is orthogonal to a length direction of the first and second bus bars, first and second magnetic detection elements arranged opposite the first and second bus bars respectively in the plate thickness direction, and a third magnetic detection element arranged opposite the third bus bar in the plate thickness direction. The first and second magnetic detection elements are gradient detection type magnetic detection elements and are arranged in such a manner that a detection axis direction thereof is perpendicular to the length direction of the first and second bus bars and is tilted with respect to the plate thickness direction of the first and second bus bars. The third magnetic detection element is arranged in such a manner that a detection axis direction thereof coincides with a plate width direction of the third bus bar.

公开(公告)号：US20170285075A1

公开(公告)日：2017-10-05

申请号：US15471134

申请日：2017-03-28

Applicant: Hitachi Metals, Ltd.

Inventor： Ken OKUYAMA ,  Naoki FUTAKUCHI ,  Katsuya AKIMOTO ,  Yujiro TOMITA

IPC: G01R15/20 ,  G01R33/09

CPC classification number: G01R15/205 ,  G01R33/025 ,  G01R33/093

Abstract: A current sensor includes a busbar carrying an electric current to be measured, a magnetic sensing element for detecting intensity of a magnetic field generated by the current flowing through the busbar, and a pair of shield plates that include a magnetic material and are arranged to sandwich the busbar in a thickness direction of the busbar. The busbar includes a through-hole penetrating therethrough and current paths formed on both sides of the through-hole, the magnetic sensing element is arranged at a position overlapping the through-hole in the thickness direction of the busbar. The busbar is arranged in a space between the pair of shield plates such that the center in the thickness direction is located at a position offset from the center of the space in the thickness direction.

公开(公告)号：US20150204919A1

公开(公告)日：2015-07-23

申请号：US14600814

申请日：2015-01-20

Applicant: Hitachi Metals, Ltd.

Inventor： Katsuya AKIMOTO ,  Hisashi TATE ,  Naofumi CHIWATA ,  Ken OKUYAMA ,  Naoki FUTAKUCHI ,  Yukio IKEDA ,  Kazuhisa TAKAHASHI ,  Shinya HAYASHI ,  Takahiro FUTATSUMORI

IPC: G01R19/15 ,  G01R33/02 ,  G01R33/00

CPC classification number: G01R19/15 ,  G01R15/207 ,  G01R33/0094 ,  G01R33/02

Abstract: A current detection structure includes a plurality of busbars arranged in parallel, and a plurality of magnetic detection elements each provided for corresponding one of the plurality of busbars so as to measure a strength of a magnetic field generated by a current flowing through the corresponding busbar. The plurality of magnetic detection elements are mounted on a single circuit board.

Abstract translation: 电流检测结构包括平行布置的多个母线，以及多个磁检测元件，每个磁检测元件分别设置用于多个母线中的相应一个母线，以便测量由流经相应母线的电流产生的磁场的强度。 多个磁检测元件安装在单个电路板上。

公开(公告)号：US20150204915A1

公开(公告)日：2015-07-23

申请号：US14600716

申请日：2015-01-20

Applicant: Hitachi Metals, Ltd.

Inventor： Ken OKUYAMA ,  Naofumi CHIWATA ,  Katsuya AKIMOTO ,  Naoki FUTAKUCHI ,  Yukio IKEDA ,  Kazuhisa TAKAHASHI

IPC: G01R19/00 ,  G01R33/09

CPC classification number: G01R19/0092 ,  G01R15/205 ,  G01R15/207 ,  G01R33/093

Abstract: A current detection structure includes a busbar to flow a current therethrough, a magnetic detection element to detect a strength of a magnetic field generated by the current flowing through the busbar, and a current detecting portion to determine the current flowing through the busbar based on the magnetic field detected by the magnetic detection element. A through-hole is formed penetrating the busbar such that a current path is formed on both sides of the through-hole. The magnetic detection element is disposed in the through-hole. The current detecting portion determines the current flowing through the busbar based on a strength of a synthetic magnetic field detected by the magnetic detection element. The synthetic magnetic field is produced by combining a magnetic field that is generated by a current flowing through the current path on the both sides of the through-hole.

Abstract translation: 电流检测结构包括用于流过电流的母线，用于检测由流过母线的电流产生的磁场的强度的磁检测元件，以及电流检测部分，用于基于电流检测部分确定流过母线的电流 由磁检测元件检测的磁场。 穿过母线的通孔形成在通孔的两侧形成电流通路。 磁检测元件设置在通孔中。 电流检测部基于由磁检测元件检测出的合成磁场的强度来确定流经母线的电流。 合成磁场通过将通过流过通孔的电流的电流产生的磁场组合在通孔的两侧而产生。