-
公开(公告)号：US20220393630A1
公开(公告)日：2022-12-08
申请号：US17774860
申请日：2021-04-28
Applicant: MITSUBA Corporation
Inventor： RYO OHORI , TAKASHI TAI
Abstract: A motor control device includes: a plurality of sensors detecting a rotation position of a rotor and outputting a position detection signal; a rotational speed determination part determining whether a rotational speed of a brushless motor is equal to or less than a predetermined threshold value based on the position detection signal; and a motor control part. An energization control part included in the motor control part uses, between a first mode and a second mode, different sensor signals serving as a trigger for an energization timing of each phase. In the first mode, an energization timing to a second phase is advanced relative to a timing at which the position detection signal of a first sensor turns on. In the second mode, an energization timing to the second phase is retarded relative to a timing at which the position detection signal of the first sensor turns on.
-
公开(公告)号：US20240136880A1
公开(公告)日：2024-04-25
申请号：US18009738
申请日：2022-03-16
Applicant: MITSUBA Corporation
Inventor： KOJI YONEKAWA , TAKESHI KANAI , RYO OHORI , YUKARI OTSUKA
Abstract: An insulator attached to a core body in an annular shape and multiple teeth protruding from the core body along a radial direction for insulating the teeth and a coil wound around the teeth includes: a tooth end surface covering part covering an axial end surface of the tooth. The tooth end surface covering part includes: an inclined part provided on a front surface of the tooth end surface covering part on a side opposite to the tooth and inclined such that its height from the axial end surface of the tooth gradually changes along the radial direction; and an inclined part parallel part and a tooth parallel part provided on a back surface of the tooth end surface covering part on the tooth side and concave in a direction away from the axial end surface of the tooth.
-
公开(公告)号：US20240063697A1
公开(公告)日：2024-02-22
申请号：US18497936
申请日：2023-10-30
Applicant: MITSUBA Corporation
Inventor： RYO OHORI
CPC classification number: H02K15/03 , H02K1/28 , H02K3/12 , H02K7/003 , Y10T29/49012
Abstract: Provided is a motor including a stator and a rotor. The rotor includes a rotor core rotating integrally with an rotation shaft and having a core base end part fixed to the rotation shaft and core protrusions protruding outward in a radial direction from the core base end part; and a magnet disposed between the core protrusions adjacent to each other in a circumferential direction on an outer peripheral surface of the core base end part. A central position of the stator core in the axial direction, a central position of the rotor core in the axial direction, and a central position of the magnet in the axial direction are deviated from each other. The central position of the magnet in the axial direction is located between the central position of the stator core in the axial direction and the central position of the rotor core in the axial direction.
-
公开(公告)号：US20230016162A1
公开(公告)日：2023-01-19
申请号：US17784111
申请日：2021-07-27
Applicant: MITSUBA Corporation
Inventor： KEISUKE TORIYAMA , RYO OHORI
IPC: H02K3/52
Abstract: In a brushless motor including a stator core and a rotor which rotates with respect to the stator core, a coil support wall supports a coil wound around a core main body part from a radially inner side of the core main body part. A first wall part and a second wall part constituting the coil support wall are connected to each other at an angle at a portion of a tooth tip part protruding from a tooth main body part along a circumferential direction of the core main body part, and a thickness dimension of the second wall part is equal to or larger than a thickness dimension of the first wall part along a radial direction of the core main body part.
-
公开(公告)号：US20240235309A9
公开(公告)日：2024-07-11
申请号：US18009738
申请日：2022-03-17
Applicant: MITSUBA Corporation
Inventor： KOJI YONEKAWA , TAKESHI KANAI , RYO OHORI , YUKARI OTSUKA
Abstract: An insulator attached to a core body in an annular shape and multiple teeth protruding from the core body along a radial direction for insulating the teeth and a coil wound around the teeth includes: a tooth end surface covering part covering an axial end surface of the tooth. The tooth end surface covering part includes: an inclined part provided on a front surface of the tooth end surface covering part on a side opposite to the tooth and inclined such that its height from the axial end surface of the tooth gradually changes along the radial direction; and an inclined part parallel part and a tooth parallel part provided on a back surface of the tooth end surface covering part on the tooth side and concave in a direction away from the axial end surface of the tooth.
-
Patent Agency Ranking
公开(公告)号：US20240195244A1
公开(公告)日：2024-06-13
申请号：US18584964
申请日：2024-02-22
Applicant: MITSUBA Corporation
Inventor： RYO OHORI , KOJI YONEKAWA , TAKESHI KANAI
IPC: H02K1/2791 , H02K1/278 , H02K15/03
CPC classification number: H02K1/2791 , H02K1/278 , H02K15/03
Abstract: A rotor is provided with: a rotor core (32); a plurality of permanent magnets (33); a substantially tubular magnet cover (71); and a load reception block (70). The rotor core (32) rotates integrally with a rotary shaft of a motor. The permanent magnets (33) are arranged on the outer peripheral part of the rotor core (32). The magnet cover (71) covers the exterior of the plurality of permanent magnets (33) and the rotor core (32), and has a flange part which is bent radially inward at the end along a rotation axis. The load reception block (70) is disposed between the flange part and the end surface of the rotor core (32) in a direction along the rotation axis, and abuts against the flange part and the rotor core (32).
-
公开(公告)号：US20240106377A1
公开(公告)日：2024-03-28
申请号：US18337035
申请日：2023-06-18
Applicant: MITSUBA Corporation
Inventor： RYO OHORI , TOSHIYUKI AMAGASA , MASAHIRO YAMADA , ATSUSHI MOCHIDA , TAMOTSU IWAZAKI
CPC classification number: H02P27/085 , B60S1/0896
Abstract: A motor control device which controls a motor having an output shaft includes a vehicle speed detection part and a driving control part. The vehicle speed detection part detects a vehicle speed, which is a traveling speed of a vehicle mounted with the motor. Based on the vehicle speed detected by the vehicle speed detection part, the driving control part performs control of switching between a first driving mode which drives the motor, and a second driving mode in which a number of revolutions of the output shaft and an output of the motor are higher than in the first driving mode.
-
公开(公告)号：US20180198333A1
公开(公告)日：2018-07-12
申请号：US15739754
申请日：2016-06-29
Applicant: MITSUBA Corporation
Inventor： RYO OHORI , NAOKI SHIODA
CPC classification number: H02K1/2773 , H02K1/278 , H02K21/14 , H02K29/03
Abstract: A rotor of a brushless motor includes permanent magnets formed on the outer circumference of a rotating shaft to have a fan shape in an axial cross section, magnetized from the inner radial surface toward the outer radial surface, and arranged at even intervals so that magnetic poles of the outer radial surfaces are disposed alternately with respect to the polarities thereof in the circumferential direction. The outer radial surface of each of the permanent magnets includes a center of curvature on a line segment connecting a center point in the circumferential width on the outer radial surface with the axial center of the rotating shaft, and formed as a cylindrical surface having a radius of curvature smaller than the distance of the line segment. Each of the permanent magnets is magnetized in a parallel orientation so that the orientation of magnetized magnetic flux is parallel to the line segment.
-
公开(公告)号：US20240339887A1
公开(公告)日：2024-10-10
申请号：US18542744
申请日：2023-12-17
Applicant: MITSUBA Corporation
Inventor： RYO OHORI
CPC classification number: H02K5/1735 , B60S1/08 , H02K7/085 , H02K7/116 , H02K21/22
Abstract: A wiper motor includes a rotor shaft, a rotor yoke, a stator core, a first ball bearing, and a second ball bearing. The rotor shaft is configured parallel to an output shaft and rotates a gear portion. The rotor yoke is fixed to the rotor shaft. The stator core has a cylindrical portion. A part of the rotor shaft and a part of the rotor yoke are inserted into the cylindrical portion. The first ball bearing is fixed to a motor housing. The second ball bearing is fixed to a base plate. At least a part of each of the first ball bearing and the second ball bearing B2 is configured inside the cylindrical portion.
-
公开(公告)号：US20230253848A1
公开(公告)日：2023-08-10
申请号：US17994396
申请日：2022-11-28
Applicant: MITSUBA Corporation
Inventor： RYO OHORI , MINORI SHODA , YUZU ISOMURA
CPC classification number: H02K3/345 , H02K1/165 , H02K2213/03
Abstract: An insulator, a stator, and an electric motor capable of improving molding accuracy and assemblability are provided. An insulator 26 includes a first insulator 61 and a second insulator 62 to be attached from both axial sides of a stator core. The first insulator 61 has a first core end surface covering portion 65 and a first skirt portion 79. The second insulator 62 has a second core end surface covering portion 265 and a second skirt portion 279. The insulator 26 includes a coil lead-out portion 77 provided integrally with only the first core end surface covering portion 65 for leading out terminal portions of coils from the first insulator 61 to the outside. A length of the longest portion of the second skirt portion 279 in the axial direction is greater than a length of the longest portion of the first skirt portion 79 in the axial direction.
-
-
-
-
-
-
-
-
-
Search Results
13
records
(took 0.014 seconds)
