Title:
MOTOR
Document Type and Number:
Japanese Patent JP2014239586
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To reduce a leakage magnetic flux between a housing and a magnet.SOLUTION: In a motor comprising a stator and a rotor, the rotor has: a bottomed cylindrical housing made of a magnetic material; and at least one magnet that is fixed to an inner face of the housing, has a different magnetic pole in a circumferential direction, and whose outer periphery has a circular or arc-like shape. The rotor has: a shaft rotatably supported around a center shaft extending in a vertical direction as a center; and an armature opposed to the magnet at an interval in a radial direction, and fixed to the shaft. The magnet has at least two contact parts contacting a bottom face of the housing, and has a non-contact part not contacting the bottom face between the two contact parts in the circumferential direction. The non-contact part includes an axial lower end of a boundary part of the magnetic pole of the magnet.
Inventors:
FUJITA TORU
MAEDA MASAYOSHI
GUNTER KINLEY
JUERGEN SCHMID
THOMAS KUEBLER
MAEDA MASAYOSHI
GUNTER KINLEY
JUERGEN SCHMID
THOMAS KUEBLER
Application Number:
JP2013120164A
Publication Date:
December 18, 2014
Filing Date:
June 06, 2013
Export Citation:
Assignee:
NIHON DENSAN KK
NIDEC MOTORS & ACTUATORS GERMANY GMBH
NIDEC MOTORS & ACTUATORS GERMANY GMBH
International Classes:
H02K1/17; H02K23/04
Domestic Patent References:
| JPH0956090A | 1997-02-25 | |||
| JP2007288903A | 2007-11-01 | |||
| JPH0496646A | 1992-03-30 | |||
| JPS5815479U | 1983-01-31 | |||
| JPS5127012U | 1976-02-27 | |||
| JPH05252690A | 1993-09-28 | |||
| JP2011172301A | 2011-09-01 | |||
| JPH10229667A | 1998-08-25 | |||
| JPH08103061A | 1996-04-16 |
Foreign References:
| US20090224622A1 | 2009-09-10 |
Attorney, Agent or Firm:
Hideaki Kitamura