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Patent Searching and Data


Title:
MOTOR AND BRUSHLESS WIPER MOTOR
Document Type and Number:
WIPO Patent Application WO/2019/198462
Kind Code:
A1
Abstract:
Provided are a motor and a brushless wiper motor, in which iron loss in a stator is suppressed to increase motor efficiency. The present invention is provided with: a stator 8 having a plurality of teeth 22 protruding radially inward from the inner peripheral surface of a stator core; coils wound on the teeth 22; a shaft rotating on the inside radially of the stator core; a rotor core 32 affixed to the shaft and radially centered on the rotation axis of the shaft; a plurality of permanent magnets 33 arranged on the outer peripheral surface of the rotor core 32; projecting poles which are formed projecting radially outward between the permanent magnets 33 adjacent to each other in the circumferential direction of the outer peripheral surface 32b of the rotor core 32, and with which the projecting contact surfaces of the permanent magnets 33 are in contact. The stator 8 is formed by stacking a plurality of electrical steel sheets Pt in the direction of the rotation axis of the shaft. At least one of the axial ends 33h of each of the permanent magnets 33 projects further than an axial end 32c of the rotor core 32.

Inventors:
OHORI,Ryo (2681 Hirosawa-cho 1-chome, Kiryu-sh, Gunma 55, 〒3768555, JP)
Application Number:
JP2019/012028
Publication Date:
October 17, 2019
Filing Date:
March 22, 2019
Export Citation:
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Assignee:
MITSUBA CORPORATION (2681, Hirosawa-cho 1-chome Kiryu-sh, Gunma 55, 〒3768555, JP)
International Classes:
H02K1/22; H02K1/27; H02K21/14
Domestic Patent References:
WO2014167645A12014-10-16
Foreign References:
JP2008245406A2008-10-09
JP2008199833A2008-08-28
JP2004048970A2004-02-12
JP2016175638A2016-10-06
US20020135252A12002-09-26
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (First Shin-Osaka MT Bldg. 2nd Floor, 5-13-9 Nishinakajima Yodogawa-ku, Osaka-sh, Osaka 11, 〒5320011, JP)
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