Electricity: motive power systems – Induction motor systems – Reversing
Reexamination Certificate
2007-03-27
2007-03-27
Duda, Rina (Department: 2837)
Electricity: motive power systems
Induction motor systems
Reversing
C318S768000, C318S772000
Reexamination Certificate
active
11113171
ABSTRACT:
A variable speed motor includes first and second main windings wound on a stator, and a relay for performing a switching operation between serial/parallel connections of the first and second main windings to control motor speed. The variable speed motor further includes a tap winding connected in series to the main windings, or an additional capacitor, such that it can greatly extend the range of a variable speed without using a drive unit capable of changing the motor speed at an external location, resulting in reduced production costs of the motor, reduced electromagnetic vibration noise, and reduced power consumption.
REFERENCES:
patent: 2774924 (1956-12-01), Witt
patent: 4384312 (1983-05-01), Fry
patent: 4467257 (1984-08-01), Douthart et al.
patent: 5146146 (1992-09-01), Samann
patent: 5227710 (1993-07-01), Lewus
patent: 5514943 (1996-05-01), Shapess
patent: 5703458 (1997-12-01), Gershen et al.
patent: 5883488 (1999-03-01), Woodward
patent: 6445101 (2002-09-01), Ley
patent: 6707214 (2004-03-01), Fei
patent: 6815926 (2004-11-01), Fei et al.
patent: 1802917 (1970-06-01), None
patent: 1638385 (1971-07-01), None
patent: 0545087 (1993-06-01), None
patent: 0813293 (1997-06-01), None
patent: 1556314 (1968-12-01), None
patent: 3-235696 (1991-10-01), None
U.S. Appl. No. 11/036,016 Min et al., filed Jan. 18, 2005.
English Language Abstract of JP 3-235696.
Choi Byung Keol
Kim Dong Won
Lee Tae Hee
Min Byoung Wook
Duda Rina
Greenblum & Bernstein P.L.C.
LG Electronics Inc.
LandOfFree
Variable speed motor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable speed motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable speed motor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3755245