-
公开(公告)号：US10712370B2
公开(公告)日：2020-07-14
申请号：US16210549
申请日：2018-12-05
申请人： Hitachi Metals, Ltd.
发明人： Naoki Futakuchi , Ken Okuyama , Katsuya Akimoto , Haruyasu Komano , Jun Umetsu , Yujiro Tomita
摘要： A current sensor includes plural bus bars which are each formed rectangular in a cross section, a pair of shield plates that include a magnetic material and are arranged so as to collectively sandwich the plural bus bars therebetween, and plural magnetic detection elements that are each arranged between the bus bars and one of the shield plates. A distance d between a detection position of a magnetic field intensity at an arbitrary one of the magnetic detection elements and a center position in the width direction between one of the bus bars corresponding to the arbitrary magnetic detection element and an other of the bus bars adjacent thereto in the width direction satisfies the following expression: d/w+0.023(w/h)≥0.36 where a width of the shield plates is w and an interval along a height direction of the shield plates is h.
-
公开(公告)号：US10209277B2
公开(公告)日：2019-02-19
申请号：US15634394
申请日：2017-06-27
申请人： Hitachi Metals, Ltd.
发明人： Ken Okuyama , Katsuya Akimoto , Naoki Futakuchi , Jun Umetsu , Yujiro Tomita
摘要： A current sensor includes, a bus bar through which a current flows, a magnetic detection element detecting a magnetic field intensity generated by the current, first and second shielding plates arranged so as to sandwich the bus bar between the first and second shielding plates, a first conductive plate made of a conductive nonmagnetic material, arranged between the bus bar and the first shielding plate, and a second conductive plate made of the conductive nonmagnetic material, arranged between the bus bar and the second shielding plate, wherein the magnetic detection element is arranged at a first conductive plate-side. A distance between the first conductive plate and the bus bar is longer than a distance between the second conductive plate and the bus bar. The first conductive plate includes a slit formed in the first conductive plate at an overlapping position, and the slit pierces the first conductive plate.
-
公开(公告)号：US11035888B2
公开(公告)日：2021-06-15
申请号：US16208890
申请日：2018-12-04
申请人： Hitachi Metals, Ltd.
发明人： Jun Umetsu , Naoki Futakuchi , Haruyasu Komano , Ken Okuyama , Yujiro Tomita
IPC分类号： G01R33/00 , G01R19/00 , H01R25/16 , G01R15/20 , G01R1/04 , G01R15/14 , G01R33/02 , G01R31/315 , G01N27/83 , G01N27/82 , G01N27/90 , G01N17/02
摘要： 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：US20180284162A1
公开(公告)日：2018-10-04
申请号：US15912138
申请日：2018-03-05
申请人： Hitachi Metals, Ltd.
发明人： Ken Okuyama , Katsuya Akimoto , Naoki Futakuchi , Haruyasu Komano , Jun Umetsu , Yujiro Tomita
摘要： A current sensor includes a bus bar through which a measured current is carried, a pair of shielding plates that include a magnetic material, and are arranged to sandwich the bus bar in a thickness direction of the bus bar, and a magnetic detection element that is arranged between the bus bar and one of the shielding plates, and detects an intensity of magnetic field caused by the current carried through the bus bar. The shielding plate has a length of not less than 20 mm in a length direction of the bus bar, and a width of not less than 24 mm and not more than 38 mm in a width direction orthogonal to the length direction.
-
公开(公告)号：US10060953B2
公开(公告)日：2018-08-28
申请号：US15471134
申请日：2017-03-28
申请人： Hitachi Metals, Ltd.
发明人： Ken Okuyama , Naoki Futakuchi , Katsuya Akimoto , Yujiro Tomita
CPC分类号： G01R15/205 , G01R33/025 , G01R33/093
摘要： 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：US20200256897A1
公开(公告)日：2020-08-13
申请号：US16783947
申请日：2020-02-06
申请人： Hitachi Metals, Ltd.
发明人： Akitoshi Fujimori , Ken Okuyama , Naoki Futakuchi , Yujiro Tomita
IPC分类号： G01R15/20
摘要： An electric current sensor includes bus bars, each of which has a plate shape and flows an electric current to be detected in a length direction, a housing for holding the bus bars with being aligned in a width direction perpendicular to the length direction and a thickness direction of the bus bars, magnetic detection elements, each magnetic detection element detecting a strength of magnetic field generated by the electric current flowing through a corresponding bus bar, and a substrate on which the magnetic detection elements are mounted. The substrate is arranged to sandwich the bus bars between the housing and the substrate, and the substrate is fixed to the housing. A fixing portion for fixing the substrate to the housing is provided at both ends of the substrate in the width direction and at least one location between the magnetic detection elements adjacent to each other in the width direction.
-
公开(公告)号：US10088505B2
公开(公告)日：2018-10-02
申请号：US15471914
申请日：2017-03-28
申请人： Hitachi Metals, Ltd.
发明人： Ken Okuyama , Katsuya Akimoto , Naoki Futakuchi , Yujiro Tomita
摘要： 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 magnetic materials and are arranged to sandwich the busbar in a thickness direction of the busbar. The shield plates include a conductive shield plate including a conductive magnetic material and a non-conductive shield plate including a non-conductive magnetic material. The conductive shield plate includes a slit penetrating therethrough. The magnetic sensing element is arranged at a position where the magnetic sensing element overlaps the slits in the thickness direction and does not overlap the conductive shield plate in the thickness direction.
-
公开(公告)号：US20170370969A1
公开(公告)日：2017-12-28
申请号：US15634394
申请日：2017-06-27
申请人： Hitachi Metals, Ltd.
发明人： Ken OKUYAMA , Katsuya Akimoto , Naoki Futakuchi , Jun Umetsu , Yujiro Tomita
CPC分类号： G01R15/205 , G01R33/093
摘要： A current sensor includes, a bus bar through which a current flows, a magnetic detection element detecting a magnetic field intensity generated by the current, first and second shielding plates arranged so as to sandwich the bus bar between the first and second shielding plates, a first conductive plate made of a conductive nonmagnetic material, arranged between the bus bar and the first shielding plate, and a second conductive plate made of the conductive nonmagnetic material, arranged between the bus bar and the second shielding plate, wherein the magnetic detection element is arranged at a first conductive plate-side. A distance between the first conductive plate and the bus bar is longer than a distance between the second conductive plate and the bus bar. The first conductive plate includes a slit formed in the first conductive plate at an overlapping position, and the slit pierces the first conductive plate.
-
公开(公告)号：US10794935B2
公开(公告)日：2020-10-06
申请号：US15912138
申请日：2018-03-05
申请人： Hitachi Metals, Ltd.
发明人： Ken Okuyama , Katsuya Akimoto , Naoki Futakuchi , Haruyasu Komano , Jun Umetsu , Yujiro Tomita
摘要： A current sensor includes a bus bar through which a measured current is carried, a pair of shielding plates that include a magnetic material, and are arranged to sandwich the bus bar in a thickness direction of the bus bar, and a magnetic detection element that is arranged between the bus bar and one of the shielding plates, and detects an intensity of magnetic field caused by the current carried through the bus bar. The shielding plate has a length of not less than 20 mm in a length direction of the bus bar, and a width of not less than 24 mm and not more than 38 mm in a width direction orthogonal to the length direction.
-
公开(公告)号：US20200256895A1
公开(公告)日：2020-08-13
申请号：US16783887
申请日：2020-02-06
申请人： Hitachi Metals, Ltd.
发明人： Ken OKUYAMA , Akitoshi Fujimori , Naoki Futakuchi , Yujiro Tomita , Jun Umetsu
摘要： An electric current sensor includes bus bars each having a plate shape through which an electric current to be detected flows in a length direction, a housing including a bus bar-holding portion for holding the bus bars with being aligned in a width direction perpendicular to the length direction and a thickness direction of the bus bars, magnetic detection elements, each of which detects a strength of magnetic field generated by the electric current flowing through a corresponding bus bar, and a first shield plate and a second shield plate arranged to sandwich the respective bus bars and the magnetic detection elements in the thickness direction. Each of the first shield plate and the second shield plate is made of a magnetic material. Both the first shield plate and the second shield plate are held directly and commonly by the housing.
-
-
-
-
-
-
-
-
-
搜索结果
11 条记录 (耗时 0.014 秒)