Title:
An electric motor
Document Type and Number:
Japanese Patent JP5918468
Kind Code:
B2
Abstract:
An electric motor has a stator and a rotor rotatably mounted in the stator. The rotor has a shaft and a fan mounted on the shaft. A air guide structure with an axial extension portion is arranged at one end of the stator adjacent the fan. The gap between the axial extension portion and the fan in the axial and/or radial direction of the motor is narrow in order to reduce air swirl generated by air flowing from the outlet of the fan to the inlet of the fan through the gap. Preferably, the width of the gap is larger than 0.05 mm and smaller than 2.0 mm. The cooling efficiency of the fan is increased and the performance of the motor is improved.
Inventors:
James Chin Chic Lau
Xiao Jun Yang
Chun Ka Yu
Xiao Jun Yang
Chun Ka Yu
Application Number:
JP2010294871A
Publication Date:
May 18, 2016
Filing Date:
December 28, 2010
Export Citation:
Assignee:
Johnson Electric Society Anonymous
International Classes:
H02K5/08; H02K1/18
Domestic Patent References:
| JP59226632A | ||||
| JP2005245139A | ||||
| JP2002051501A | ||||
| JP25004256B1 | ||||
| JP4000157U |
Attorney, Agent or Firm:
Koichi Tsujii
Sadao Kumakura
Fumiaki Otsuka
Takaki Nishijima
Hiroyuki Suda
Hiroshi Uesugi
Sadao Kumakura
Fumiaki Otsuka
Takaki Nishijima
Hiroyuki Suda
Hiroshi Uesugi
Previous Patent: A manufacturing method of moisturing tissue paper products
Next Patent: DOPPLER TYPE DIRECTION FINDER
Next Patent: DOPPLER TYPE DIRECTION FINDER