Title:
ROTOR, MOTOR AND BRUSHLESS MOTOR
Document Type and Number:
WIPO Patent Application WO/2020/100368
Kind Code:
A1
Abstract:
A rotor, motor and brushless motor are provided which can suppress increased magnetic field distortion while maintaining fixing stability of permanent magnets. This rotor 9 is provided with a rotor core 32, permanent magnets 33 and a protrusion 35. The protrusion 35 protrudes radially outwards between permanent magnets 33 which are adjacent in the circumferential direction on the outer peripheral surface 32b of the rotor core 32. The orientation of the permanent magnets 33 is a parallel orientation in which the easy magnetization direction is a direction parallel to the radial direction in the center of the permanent magnets 33. The circumferential-direction side faces 33d of the permanent magnets 33 contact the protrusion 35 in the circumferential direction. Connection surfaces 33e of the permanent magnets 33 are connected to the circumferential-direction side face 33d and to the outer peripheral surface 33a which is outside in the radial direction. The position of the tip 35t of the protrusion 35 in the protrusion direction is arranged within the area between the center 33g of the circumferential-direction side face 33d in the protrusion direction and the crossing ridge section 33h where the circumferential-direction side face 33d and the connection surface 33e cross.
Inventors:
OHORI RYO (JP)
SHIODA NAOKI (JP)
SHIODA NAOKI (JP)
Application Number:
PCT/JP2019/032796
Publication Date:
May 22, 2020
Filing Date:
August 22, 2019
Export Citation:
Assignee:
MITSUBA CORP (JP)
International Classes:
H02K1/27; H02K1/28
Domestic Patent References:
| WO2018043026A1 | 2018-03-08 | |||
| WO2017002873A1 | 2017-01-05 | |||
| WO2015102047A1 | 2015-07-09 |
Foreign References:
| JP2010187427A | 2010-08-26 |
Other References:
See also references of EP 3883092A4
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (JP)
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