公开(公告)号：US10574127B2

公开(公告)日：2020-02-25

申请号：US16088426

申请日：2017-03-21

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Teruyuki Takizawa ,  Hironori Tomita ,  Tsutomu Shimomura ,  Masakazu Kobayashi ,  Yasuaki Kameyama ,  Hirohide Ichihashi

IPC: G03B17/00 ,  H02K41/035 ,  G03B17/56 ,  H02K11/215 ,  H02K3/46

Abstract: In an actuator (camera driver) according to the present invention, when a movable unit is in a neutral position in which the movable unit has rotated around neither an axis nor an axis, a first synthetic vector and a second synthetic vector are directed toward an object to be driven with respect to a plane including the both axes. The first synthetic vector is defined by synthesizing together two first vectors, pointing toward a pair of magnetic yokes, of magnetic attraction forces between a pair of first driving magnets and the pair of magnetic yokes. The second synthetic vector is defined by synthesizing together two second vectors, pointing toward a pair of magnetic yokes, of magnetic attraction forces between a pair of second driving magnets and the pair of magnetic yokes.

公开(公告)号：US11726113B2

公开(公告)日：2023-08-15

申请号：US17432384

申请日：2020-03-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuta Sato ,  Hirohide Ichihashi ,  Mitsuru Tomita ,  Masakazu Kobayashi ,  Manabu Hashimoto

IPC: G01R31/18 ,  G01R15/18 ,  G01R19/00

CPC classification number: G01R15/186 ,  G01R19/0053

Abstract: A current sensor is configured to detect a current flowing through an electrical conductor. The current sensor includes a core and a coil wound around the core. The core has a hollow configure to allow the electrical conductor to pass through the hollow. The core substantially has a C-shape haying a gap connected to the hollow. At least a part of the gap of the core is located inside the coil. This current sensor suppresses the influence of external noise.

公开(公告)号：US12203962B2

公开(公告)日：2025-01-21

申请号：US17442560

申请日：2020-02-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuta Sato ,  Hirohide Ichihashi ,  Kazutaka Ikeda

IPC: G01R15/18 ,  G01R1/20 ,  G01R19/00 ,  G01R19/25 ,  H01F38/30

Abstract: A current measurement system is configured to measure an alternating-current (AC) current flowing through a conductor. The AC current has a frequency within a measurement range. The system includes a current sensor and a shunt resistor. The current sensor includes a measurement coil configured to be magnetically coupled to the conductor. The shunt resistor has both ends electrically connected to both ends of the measurement coil, respectively. An output voltage across the both ends of the shunt resistor is saturated at a saturation point in a saturation frequency of the frequency of the AC current. An upper limit value of the measurement range including the frequency is higher than a fundamental frequency of the AC current. The saturation frequency is higher than or equal to the upper limit value. The current measurement system improves sensitivity to frequency components higher than the fundamental frequency of the AC current.

公开(公告)号：US11761989B2

公开(公告)日：2023-09-19

申请号：US17429134

申请日：2020-03-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuta Sato ,  Hirohide Ichihashi ,  Mitsuru Tomita ,  Masakazu Kobayashi

IPC: G01R15/18 ,  G01R19/15

CPC classification number: G01R15/186 ,  G01R19/15

Abstract: A current sensor is configured to detect a current flowing through an electrical conductor. The current sensor includes a core and a coil wound around the core. The core has a hollow therein configured to allow the electrical conductor to pass through the hollow. The core substantially has a C-shape having a gap connected to the hollow. The core has a pair of end surfaces facing each other in a facing direction across the gap. The core includes plural split cores joined to one another. Each pair of split cores of the plural split cores adjacent to each other have respective joining surfaces joined to each other. The respective joining surfaces of the each pair of split cores being parallel to the facing direction. This current sensor has a desired sensitivity characteristic.

公开(公告)号：US09660546B2

公开(公告)日：2017-05-23

申请号：US14636995

申请日：2015-03-03

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akira Kato ,  Kazuyuki Sakiyama ,  Hirohide Ichihashi

IPC: H01F27/00 ,  H02M7/04 ,  H01F3/12 ,  H01F27/38

CPC classification number: H02M7/04 ,  H01F3/12 ,  H01F27/00 ,  H01F27/38

Abstract: A coil structure includes: a magnetic core that defines a closed loop magnetic path in which a magnetic flux flows, the magnetic core including a core leg; a coil that is wound around the core leg about a coil axis extending in a first direction, the coil generating the magnetic flux; a detour member that is separate from the magnetic core, the detour member defining a detour magnetic path that detours around the closed loop magnetic path between first and second points, the detour member including a first piece that defines the first point and a second piece that defines the second point; and a fixing portion that includes an adjoining member adjoining the core leg and a connecting portion connecting at least one of the first piece and the second piece to the adjoining member and fixes positional relations among the core leg and the first and second points.