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US3728566A Expired / Lapsed US ⏱️ 0.0 years remaining

Salient pole rotor construction with removable pole tips

Assignee: General Electric Co
•
Filing: 1971-10-04
•
Granted: 1973-04-17
•
Expires: 1991-10-04
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Abstract

Abstract A salient pole rotor construction which has removable pole tips to facilitate assembly and disassembly of the rotor. The removable pole tip is so constructed that centrifugal forces produced during rotation act to seat the pole tip more firmly to the rotor pole. The rotor pole bodies have an arcuate pole tip retaining slot extending along the length of the pole body. The removable pole tip consists of the pole tip portion having a surface which mates with that of the pole surface and an arcuate retaining stem which has the same curvature as the retaining slot in the pole shoe. The rotor is assembled by positioning a preformed field coil over the rotor core and then attaching the salient pole tips by inserting the arcuate stem in the retaining slot to lock the coil in place and retain it in position. By virtue of the arcuate configuration, the centrifugal forces generated by rotation force the arcuate stem of the pole tips firmly against the side of the slots thereby utilizing the centrifugal force to seat the salient pole tips firmly. By virtue of this construction, pre-formed field coils may be used simplifying the assembly of the rotor. Assembly time is reduced, while at the same time, scrap and rework losses are cut down producing highly desirable cost savings.

Inventors

  • 👤 C Costello

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 06:41
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/08; H02K3/00; H02K3/46; H02K3/52; H02K3/527

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 114 words
In a dynamoelectric machine the combination of; a. a laminated rotor having a plurality of pole bodies b. a pre-formed winding mounted about each pole body, c. removable salient pole tips for each of said pole bodies extending over said windings, said removable pole tips including, 1. a pole tip portion having an upper surface which mates with the top surface of the pole body to form a salient pole construction, 2. an arcuate retaining stem for securing the pole tips to the pole body, d. means for securing the removable pole tips to the pole body including arcuate retaining slot means in the pole body for receiving the arcuate pole tip retaining stem.
Claim 2
Dependent Claim 114 words
In a dynamoelectric machine the combination of; a. a laminated rotor having a plurality of pole bodies b. a pre-formed winding mounted about each pole body, c. removable salient pole tips for each of said pole bodies extending over said windings, said removable pole tips including, 1. a pole tip portion having an upper surface which mates with the top surface of the pole body to form a salient pole construction, 2. an arcuate retaining stem for securing the pole tips to the pole body, d. means for securing the removable pole tips to the pole body including arcuate retaining slot means in the pole body for receiving the arcuate pole tip retaining stem.
Claim 3
Dependent Claim 34 words
The dynamoelectric machine with a salient pole rotor as defined in claim 1 wherein the said retaining slot means includes arcuate slots extending on opposite sides of each pole along the entire length thereof.
Claim 4
Dependent Claim 42 words
an arcuate retaining stem for securing the pole tips to the pole body, d. means for securing the removable pole tips to the pole body including arcuate retaining slot means in the pole body for receiving the arcuate pole tip retaining stem.
Claim 5
Dependent Claim 42 words
an arcuate retaining stem for securing the pole tips to the pole body, d. means for securing the removable pole tips to the pole body including arcuate retaining slot means in the pole body for receiving the arcuate pole tip retaining stem.
Claim 6
Dependent Claim 50 words
The dynamoelectric machine with a salient pole rotor as Defined in claim 1 including a non-magnetic coil retainer positioned between the removable pole tips and the pre-formed coils, said coil retainer having an aperture to receive the pole body, and side walls extending downwardly over a portion of the coils.
Claim 7
Dependent Claim 38 words
The dynamo electric machine with a salient pole rotor as defined in claim 3 wherein said coil retainer includes at least one locking groove on the upper surface to receive the under side of said pole tip portion.
Claim 8
Dependent Claim 34 words
The dynamoelectric machine with a salient pole rotor as defined in claim 4 in which said pole tip portion has a lip on the under side thereof which is retained in said locking groove.
Claim 9
Dependent Claim 36 words
The dynamoelectric machine with a salient pole rotor as defined in claim 1 in which each removable pole tip includes a U-shaped pole tip portion and an arcuate retaining stem extending downward from the U-shaped portion.
Claim 10
Dependent Claim 35 words
The dynamoelectric machine with a salient pole rotor as defined in claim 6 wherein each pole includes two such pole tips secured together to form a pole tip having an aperture to receive said pole.

References Cited (Backward Citations)

US571462A Cited
US853285A Cited
US1279643A Cited
US2736829A Cited
US3339097A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-04-16 1976-10-16 1977-04-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-04-16 1980-10-16 1981-04-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-04-16 1984-10-16 1985-04-17 $7700.00 Window Closed / Lapsed

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