公开(公告)号：US20170264159A1

公开(公告)日：2017-09-14

申请号：US15529016

申请日：2015-11-11

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Kota KITAMURA ,  Hiroyuki TSUBAKIMOTO ,  Ryohei OISHI

IPC: H02K5/16 ,  H02K5/08 ,  H02K21/16 ,  H02K5/15

CPC classification number: H02K5/163 ,  H02K1/18 ,  H02K3/34 ,  H02K5/04 ,  H02K5/08 ,  H02K5/14 ,  H02K5/15 ,  H02K5/16 ,  H02K11/21 ,  H02K11/30 ,  H02K15/028 ,  H02K15/03 ,  H02K21/14 ,  H02K21/16 ,  H02K29/08

Abstract: An inner-rotor-type motor is configured such that a projecting portion is formed on an inner circumferential surface of a housing, a recess portion is formed on an outer circumferential surface of a stator, the stator is positioned with respect to the housing by the recess portion and the projecting portion being fitted to each other, the stator is configured by an annular insulator having an attachment surface being brought into close contact with a core end surface at one axial end of a stator core, a sensor substrate is attached to the insulator so as to be capable of detecting a rotation angle of a rotor, the recess portion of the stator is configured by a cutout portion being formed in an area that is a part of an outer circumferential surface of the insulator and includes a portion that is brought into close contact with the core end surface.

公开(公告)号：US20170358961A1

公开(公告)日：2017-12-14

申请号：US15521034

申请日：2015-10-09

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Kota KITAMURA ,  Hidenori SHIMIZU ,  Atsushi TAKEYAMA ,  Motoharu MUTO ,  Hiroyuki TSUBAKIMOTO ,  Koichi HASHIMOTO

IPC: H02K1/14 ,  H02K1/18 ,  H02K7/14 ,  H02K5/04

CPC classification number: H02K1/146 ,  H02K1/185 ,  H02K5/04 ,  H02K7/145 ,  H02K2213/03

Abstract: A brushless motor includes: a stator core having a cylindrical yoke portion and a teeth portion having a shape protruding from an inner circumferential surface of the yoke portion; and a rotor that is disposed inside the stator core, spaced apart from the teeth portion, and uses a center axis of the yoke portion as an axis of rotation. The yoke portion includes, on its outer circumferential surface, a notch portion at a position on the back side of the teeth portion. The notch portion has a circumferential width smaller than a circumferential width of the teeth portion.

公开(公告)号：US20230120149A1

公开(公告)日：2023-04-20

申请号：US17766899

申请日：2020-09-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Itaru MURUI ,  Kotaro MOMOEDA ,  Kota KITAMURA ,  Naoki TSUJIMOTO ,  Akito NAKAMURA

IPC: B25B23/147 ,  B25F5/00 ,  B25B21/02

Abstract: An electric tool includes an output shaft and a controller. The output shaft is configured to hold a tip tool and be rotated by motive power provided from an electric motor with the output shaft holding the tip tool. The controller is configured to control rotation of the output shaft in accordance with pressing force in a direction from a tip end of the tip tool toward the output shaft. The electric tool has, as an operation range, a restriction range in which rotation of the output shaft is restricted in a state where the pressing force is less than or equal to a prescribed value.

公开(公告)号：US20230001549A1

公开(公告)日：2023-01-05

申请号：US17778308

申请日：2020-09-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Itaru MURUI ,  Shota FUJII ,  Keita OKAMOTO ,  Naoki TSUJIMOTO ,  Kota KITAMURA ,  Kotaro MOMOEDA

IPC: B25B23/147 ,  B25B21/02 ,  H02P23/00

Abstract: An electric tool system includes a motor, a control unit, and an output shaft. The motor includes a stator and a rotor. The control unit performs vector control on the motor. The control unit includes a first acquisition unit, a second acquisition unit, and a command value generation unit. The command value generation unit calculates, based on a torque current acquisition value (current measured value) as a value related to a torque current as acquired by the first acquisition unit and an acceleration acquisition value as a value related to acceleration of the rotor as acquired by the second acquisition unit, at least one of a command value of the torque current to be supplied to the motor or a command value of an excitation current to be supplied to the motor.

公开(公告)号：US20230170768A1

公开(公告)日：2023-06-01

申请号：US17913401

申请日：2021-02-05

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akito NAKAMURA ,  Kota KITAMURA

IPC: H02K11/33 ,  H02K3/52 ,  H02K7/14

CPC classification number: H02K11/33 ,  H02K3/522 ,  H02K7/145

Abstract: A brushless motor is an inner rotor type brushless motor. The brushless motor includes a plurality of phase coils of multiple phases arranged around a rotation axis, and a plurality of terminals configured to connect the plurality of phase coils of multiple phases to a switching circuit. The plurality of terminals are located inside a circumscribed circle of the plurality of phase coils of multiple phases.

公开(公告)号：US20220410283A1

公开(公告)日：2022-12-29

申请号：US17766914

申请日：2020-09-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kota KITAMURA ,  Itaru MURUI ,  Naoki TSUJIMOTO ,  Kotaro MOMOEDA ,  Akito NAKAMURA

IPC: B23B45/02 ,  B25F5/00

Abstract: An electric tool includes a pressure-sensitive sensor, a support, an output shaft, and a controller. The pressure-sensitive sensor is configured to sense pressing force which is externally provided. The support supports the pressure-sensitive sensor. The output shaft is configured to hold a tip tool and be rotated relative to the support by motive power provided from an electric motor with the output shaft holding the tip tool. The controller is configured to control rotation of the output shaft in accordance with an output according to the pressing force, the output being output from the pressure-sensitive sensor.

公开(公告)号：US20170353085A1

公开(公告)日：2017-12-07

申请号：US15537818

申请日：2015-12-09

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Kota KITAMURA ,  Hidenori SHIMIZU ,  Atsushi TAKEYAMA ,  Motoharu MUTO ,  Daiju KINOSHITA

IPC: H02K11/33 ,  H02K7/14 ,  H02K11/21

Abstract: A motor includes: a stator; a rotor axially aligned with the stator; a circuit board; and a heat dissipating plate. The stator includes: an iron core including teeth; an insulator covering one end surface, in the axial direction, of the iron core; and a coil wound around the teeth. The insulator includes an electrically insulating material having a lower rate of heat transfer than a material included in the iron core. The heat dissipating plate is attached to the insulator in a state in which the heat dissipating plate is in contact with the insulator without being in contact with the iron core, and the circuit board is attached to the heat dissipating plate in a state in which the circuit board is in contact with the heat dissipating plate without being in contact with the iron core.