Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2005-12-05
2009-10-06
Le, Dang D (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S198000
Reexamination Certificate
active
07598648
ABSTRACT:
A multi-speed single-phase induction motor including a stator having a main winding selectively adapted for 2n-pole operation and 6n-pole operation, where n is an integer. The main winding includes a plurality of coil sets. The motor is configured to energize at least one of the coil sets during 2n-pole operation and during 6n-pole operation.
REFERENCES:
patent: 4473788 (1984-09-01), Kirschbaum
patent: 5825111 (1998-10-01), Fei
patent: 6175209 (2001-01-01), Fei
patent: 6707214 (2004-03-01), Fei
patent: 6815926 (2004-11-01), Fei et al.
patent: 3432145 (2003-05-01), None
“Design and Test Analysis of Single-Phase Induction Motors with 4-8 Pole Common Winding,” Renyan W. Fei and Jerry D. Lloyd, IEEE Transactions on Industry Applications, vol. 31, No. 6, Nov./Dec. 1995, pp. 1-4.
Emerson Electric Co.
Harness & Dickey & Pierce P.L.C.
Le Dang D
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