Axial gap-type electric motor

Details Axial gap-type electric motor Axial gap-type electric motor

2011-05-24

2011-05-24

Le, Dang D (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S051000, C310S090000

Reexamination Certificate

active

07948132

ABSTRACT:
An electric motor includes a stator, at least one rotor, an output shaft engaged with the at least one rotor, and a contact area changing device configured to change an area of contact between the at least one rotor and the output shaft, wherein the area of contact between the at least one rotor and the output shaft affects a characteristic resonant frequency of the at least one rotor. A method to reduce vibrations in an electric motor includes engaging an output shaft into at least one rotor, rotating the output shaft and the at least one rotor with respect to a stator, changing an area of contact between the at least one rotor and a radial protrusion of the output shaft, and shifting the resonant frequency of the at least one rotor with the changed area of contact.

REFERENCES:
patent: 4306167 (1981-12-01), Tomite et al.
patent: 2006/0056996 (2006-03-01), Cook
patent: 8-107650 (1996-04-01), None
Patent Abstracts of Japan, Publication No. 08107650 A, Publication Date Apr. 23, 1996, 1 page.
Office Action issued in Chinese Patent Application No. 200810215386.2, dated Nov. 15, 2010 (4 pages).

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