公开(公告)号：US10181753B2

公开(公告)日：2019-01-15

申请号：US14781902

申请日：2014-03-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masataka Kanda ,  Satoru Ueno ,  Kenji Yamaguchi

IPC: H02J7/00 ,  H02J9/06 ,  H02H7/26 ,  B60L3/00 ,  B60L3/04 ,  B60L11/18 ,  H02H3/08 ,  H02H3/20 ,  H02H3/24 ,  H02H3/32

Abstract: The electric power system protection device according to the present invention includes a transformer including a primary winding and a secondary winding which are electrically isolated from each other. The primary winding is to be connected to a first electric path which is to be connected to an external power supply configured to supply AC power by use of a secondary battery, so as to receive the AC power from the external power supply. The secondary winding is to be connected to a second electric path to be connected to a power supply path from a commercial electric power system to an electric load.

公开(公告)号：US20150160271A1

公开(公告)日：2015-06-11

申请号：US14413648

申请日：2013-06-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hiroshi Yoshida ,  Masataka Kanda ,  Takuya Kagawa ,  Kenji Okada ,  Atsushi Nakamura

IPC: G01R19/00 ,  G01R33/06

CPC classification number: G01R19/0092 ,  G01R15/18 ,  G01R15/185 ,  G01R15/186 ,  G01R19/165 ,  G01R33/06

Abstract: A current detection device includes: a core to be disposed in the vicinity of a conductor as a detection target; a winding wound around the core; an excitation unit configured to apply an excitation signal, having a magnitude and a direction that change at a constant period, to the winding; a magnetic flux detection unit (comparator and averaging circuit) configured to detect a magnetic flux generated in the core due to current flowing through the conductor; and an adder unit configured to add a feedback signal to the excitation signal such that the magnetic flux detected by the magnetic flux detection unit is cancelled.

Abstract translation: 电流检测装置包括：芯片，设置在作为检测对象的导体附近; 缠绕在芯上的绕组; 激励单元，被配置为将具有以恒定周期变化的幅度和方向的激励信号施加到所述绕组; 磁通量检测单元（比较器和平均电路），其被配置为检测由于电流流经所述导体而在所述磁芯中产生的磁通量; 以及加法器单元，被配置为向激励信号添加反馈信号，使得由磁通检测单元检测到的磁通被消除。

公开(公告)号：US09841442B2

公开(公告)日：2017-12-12

申请号：US14441719

申请日：2013-11-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hiroshi Yoshida ,  Masataka Kanda

IPC: G01R35/00 ,  G06F3/038 ,  G01R15/18 ,  G01R19/00 ,  G01R19/165 ,  G01R19/20

CPC classification number: G01R15/185 ,  G01R19/0092 ,  G01R19/165 ,  G01R19/20

Abstract: A first coil is wound around a first core, and have one end that is connected to ground and the other end that is connected to one end of a second coil. The second coil is wound around a second core, and has the one end that is connected to the first coil, and the other end that is connected to an excitation unit via a current-limiting resistor. A magnetic flux is generated in the first core by an excitation signal outputted from the excitation unit. Induced electromotive force is generated in the conductor due to the magnetic flux generated in the first core. The direction of the magnetic flux generated in the second core is opposite to the direction of the magnetic flux generated in the first core, and the induced electromotive forces of them generated in the conductor are cancelled each other out.

公开(公告)号：US20150276816A1

公开(公告)日：2015-10-01

申请号：US14441719

申请日：2013-11-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hiroshi Yoshida ,  Masataka Kanda

IPC: G01R15/18 ,  G01R19/165 ,  G01R19/00

CPC classification number: G01R15/185 ,  G01R19/0092 ,  G01R19/165 ,  G01R19/20

Abstract: A first coil is wound around a first core, and have one end that is connected to ground and the other end that is connected to one end of a second coil. The second coil is wound around a second core, and has the one end that is connected to the first coil, and the other end that is connected to an excitation unit via a current-limiting resistor. A magnetic flux is generated in the first core by an excitation signal outputted from the excitation unit. Induced electromotive force is generated in the conductor due to the magnetic flux generated in the first core. The direction of the magnetic flux generated in the second core is opposite to the direction of the magnetic flux generated in the first core, and the induced electromotive forces of them generated in the conductor are cancelled each other out.

Abstract translation: 第一线圈缠绕在第一芯上，并且具有连接到地的一端和连接到第二线圈的一端的另一端。 第二线圈缠绕在第二芯上，并且其一端连接到第一线圈，另一端经由限流电阻器连接到励磁单元。 通过从激励单元输出的激励信号在第一磁芯中产生磁通量。 由于在第一芯体中产生的磁通量，在导体中产生感应电动势。 在第二芯中产生的磁通的方向与在第一芯中产生的磁通的方向相反，并且导体中产生的感应电动势被抵消。