公开(公告)号：US20200313511A1

公开(公告)日：2020-10-01

申请号：US16828690

申请日：2020-03-24

Applicant: Panasonic Intellectual Property Management Co, Ltd

Inventor： Itaru Murui ,  Masari Muramatsu ,  Motoharu Muto ,  Kota Kitamura

IPC: H02K7/14 ,  B25F5/02 ,  B25B21/02 ,  H02K11/215

Abstract: A motor for electric power tools according to an embodiment includes: a rotor having a rotational shaft; a stator having a coil to rotate the rotor; a first substrate mounting a sensor element to detect a rotational position of the rotor; and a second substrate mounting a switching element to change, based on a result of detection by the sensor element, a conducting direction in which a current flows with respect to the coil. The first substrate and the second substrate are arranged side by side along, and intersect at right angles with, the rotational shaft.

公开(公告)号：US10530224B2

公开(公告)日：2020-01-07

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 ,  H02K11/21 ,  H02K7/14

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.

公开(公告)号：US11632017B2

公开(公告)日：2023-04-18

申请号：US16828690

申请日：2020-03-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Itaru Murui ,  Masari Muramatsu ,  Motoharu Muto ,  Kota Kitamura

IPC: H02K7/14 ,  B25B21/02 ,  B25F5/02 ,  H02K11/215

Abstract: A motor for electric power tools according to an embodiment includes: a rotor having a rotational shaft; a stator having a coil to rotate the rotor; a first substrate mounting a sensor element to detect a rotational position of the rotor; and a second substrate mounting a switching element to change, based on a result of detection by the sensor element, a conducting direction in which a current flows with respect to the coil. The first substrate and the second substrate are arranged side by side along, and intersect at right angles with, the rotational shaft.

公开(公告)号：US10355538B2

公开(公告)日：2019-07-16

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 ,  H02K5/04 ,  H02K7/14

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.