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Patent Searching and Data


Title:
MOTOR
Document Type and Number:
WIPO Patent Application WO/2019/189208
Kind Code:
A1
Abstract:
This motor comprises a rotary shaft, a rotor, and a stator. The rotor comprises a rotor core, and a plurality of magnet pole portions which are embedded in the rotor core and which have respective permanent magnets. The plurality of magnet pole portions have different polarities alternately in the circumferential direction. The stator comprises a plurality of teeth, and winding wound around the plurality of teeth. Protrusions protruding outwardly in the radial direction are provided between the magnet pole portions having alternately different poles on the outer circumferential portion of the rotor core. The motor is configured such that, when the radial facing relationship between the rotor core and the plurality of teeth at different times during one rotation of the rotor is seen, there is a timing at which the number of teeth that face the magnet pole portions but do not face the protrusions is greater than the number of teeth that simultaneously face a pair of magnet pole portions adjacent to each other in the circumferential direction and the protrusion therebetween.

Inventors:
MIKAMI Koji (1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)
UTSUMI Akihiro (1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)
TAKEMOTO Yoshiaki (1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)
HOTTA Koji (1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)
Application Number:
JP2019/012913
Publication Date:
October 03, 2019
Filing Date:
March 26, 2019
Export Citation:
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Assignee:
DENSO CORPORATION (1-1 Showa-cho, Kariya-city Aichi, 61, 〒4488661, JP)
International Classes:
H02K21/16; H02K1/27
Domestic Patent References:
WO2017085814A12017-05-26
Foreign References:
JP2005287299A2005-10-13
JP2017077044A2017-04-20
JP2016214081A2016-12-15
JP2014155372A2014-08-25
JP2008545360A2008-12-11
Attorney, Agent or Firm:
ONDA Makoto et al. (12-1, Ohmiya-cho 2-chome Gifu-sh, Gifu 31, 〒5008731, JP)
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