公开(公告)号：US20230238906A1

公开(公告)日：2023-07-27

申请号：US17976885

申请日：2022-10-31

Applicant: MITSUBA Corporation

Inventor： RYO OHORI ,  TAKESHI KANAI

IPC: H02P23/18 ,  B60S1/08

CPC classification number: H02P23/18 ,  B60S1/08 ,  H02P2203/03 ,  H02P2101/45

Abstract: An advance angle correction method of a motor device includes: acquiring first advance angle correction information indicating a correspondence relationship between an advance angle correction amount and a rotation speed difference of a rotor of the motor calculated in advance based on a rotation speed change rate; measuring the rotation speed difference of the rotor; calculating a first advance angle correction amount for each rotation direction of the rotor as a first forward rotation advance angle correction amount and a first reverse rotation advance angle correction amount so that a rotation speed difference of an output shaft becomes smaller based on the first advance angle correction information and the rotation speed difference of the rotor; and storing the calculated first forward rotation advance angle correction amount and the first reverse rotation advance angle correction amount as advance angle correction information for each motor device.

公开(公告)号：US20230059962A1

公开(公告)日：2023-02-23

申请号：US17790497

申请日：2021-09-01

Applicant: MITSUBA Corporation

Inventor： RYO OHORI ,  TAKESHI KANAI

IPC: H02K1/18 ,  H02K7/116 ,  H02K21/16

Abstract: The motor comprises: a stator around which coils are wound and which forms a rotating magnetic field rotating a rotor; and a first motor case housing the stator. The stator has: a core body portion forming an annular magnetic path; and a fastening portion projecting outside in the radial direction from the outer circumferential surface of the core body portion. The fastening portion has an attachment hole which is formed in a penetrating manner along the rotating axis line direction of the rotor and into which a fastening screw for fixing the stator to the first motor case is inserted. The first motor case has: first to third core receiving portions receiving an end portion of the core body portion in the rotating axis line direction; and first and second fastener receiving portions receiving an end portion of the fastening portion in the rotating axis line direction.

公开(公告)号：US20220060069A1

公开(公告)日：2022-02-24

申请号：US17312004

申请日：2019-10-01

Applicant: MITSUBA Corporation

Inventor： RYO OHORI

IPC: H02K1/27 ,  H02K7/116 ,  H02K21/16 ,  B60S1/08

Abstract: Provided are a rotor, a motor, and a wiper motor. An arc center of an outer circumferential surface of a rotor core and an arc center of an inner circumferential surface of a permanent magnet are off-centered radially outward from a rotational axis, with the circumferential center disposed on the radially outermost side. An angle formed by salient pole side surfaces facing each other of circumferentially adjacent two salient poles is equal to an angle formed by magnet side surfaces on both sides circumferentially of the permanent magnet. When the distance between the outer circumferential surface of the rotor core and the radially outermost end of the salient poles is Lt, and the distance between the inner circumferential surface of the permanent magnet and the radially outermost end of the magnet side surfaces is Lme, the distances Lt, Lme are set such that the relationship Lme