Title:
MOTOR
Document Type and Number:
WIPO Patent Application WO/2016/021073
Kind Code:
A1
Abstract:
[Problem] To reduce the axial size of a motor provided with a rotation detection device. [Solution] A motor M1 provided with a rotation detection device 1 has a motor shaft SH and a motor electromagnetic unit 200 for rotating the motor shaft SH. The rotation detection device 1 is provided with: a housing 2; a shaft 3 that is rotatably supported by the housing 2, is coupled to the motor shaft SH, and has magnets 4a to 4c fixed thereto; and magnetic field detection units 5a to 5d that are for detecting the magnetic fields of the magnets 4a to 4c, are provided with a magnetic element 51 and coil 52 that generate a large Barkhausen effect, have longitudinal directions that are parallel to tangents of the circular rotation paths R1 to R4 of the magnets 4a to 4c, and are fixed to the housing 2 so as to be capable of opposing the magnets 4a to 4c in the radial direction of the circular rotation paths R to R4.
Inventors:
YOSHIDOMI SHIRO (JP)
OYAMA SHOJI (JP)
KASUGA ATSUSHI (JP)
OYAMA SHOJI (JP)
KASUGA ATSUSHI (JP)
Application Number:
PCT/JP2014/071110
Publication Date:
February 11, 2016
Filing Date:
August 08, 2014
Export Citation:
Assignee:
YASKAWA DENKI SEISAKUSHO KK (JP)
International Classes:
G01D5/245; H02K24/00
Foreign References:
| JP2014137233A | 2014-07-28 | |||
| JP2009147778A | 2009-07-02 | |||
| JP2014048251A | 2014-03-17 | |||
| JP2014112113A | 2014-06-19 | |||
| JPH11178284A | 1999-07-02 |
Attorney, Agent or Firm:
MASUDA Hirofumi et al. (JP)
Hirofumi Masuda (JP)
Hirofumi Masuda (JP)
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