Brushless motor

Details Brushless motor Brushless motor

2011-04-12

2011-04-12

Leung, Quyen (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S216058, C310S216074, C310S216091, C310S215000, C310S156280

Reexamination Certificate

active

07923887

ABSTRACT:
Disclosed herein is a brushless motor that is simply constructed based on a vernier type motor to achieve high torque without the increase in size and complication thereof. The brushless motor includes a rotor having magnetized surfaces alternately magnetized as N and S poles and a stator having salient poles. The salient poles have tip end surfaces opposite to the magnetized surfaces in the radial direction. Grooves and protrusions are alternately formed at the tip end surfaces of the salient poles in the rotational direction. The grooves and the protrusions extend in the axial direction and have a width in the rotational direction approximately equal to that of the N pole or the S pole. Magnetic bodies are disposed in gaps defined between the grooves and the magnetized surfaces in a non-contact fashion. A magnetic connection member is spaced apart from the stator to interconnect the magnetic bodies.

REFERENCES:
patent: 6809442 (2004-10-01), Kaneko et al.
patent: 7737598 (2010-06-01), Ionel et al.
patent: 2004/0145267 (2004-07-01), Lowry et al.
patent: 2004/0245887 (2004-12-01), Fujinaka
patent: 5-111233 (1993-04-01), None
patent: 2006-61326 (2006-03-01), None

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