US4099076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damped rotor for a multi-channel generating system
Assignee: Sundstrand Corp
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Filing: 1977-05-18
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Granted: 1978-07-04
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Expires: 1997-05-18
Abstract
Abstract An improved rotor assembly for a generator used in a multi-channel parallel electrical generating system. A plurality of laminated sections, each having N outwardly extending poles, are stacked to form a rotor. Field windings are wound around the N poles and damper turns are wound around adjacent pole pairs to reduce the mutual flux coupling between the rotor and the stator, thereby reducing the fundamental component of torque between the rotor and the stator.
Inventors
- 👤 David J. Hucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:58
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/18; H02K3/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
74 words
A rotor for an alternator in a multi-channel generating system comprising: a plurality of laminated sections, each section having a center and N outwardly extending poles therefrom stacked to form a rotor; field windings wound around the N poles; and damper turns electrically insulated from the field windings wound around each pair of adjacent poles of opposite polarity for providing a short circuit current path linking the pair of adjacent poles of opposite polarity.
Claim 2
Dependent Claim
74 words
A rotor for an alternator in a multi-channel generating system comprising: a plurality of laminated sections, each section having a center and N outwardly extending poles therefrom stacked to form a rotor; field windings wound around the N poles; and damper turns electrically insulated from the field windings wound around each pair of adjacent poles of opposite polarity for providing a short circuit current path linking the pair of adjacent poles of opposite polarity.
Claim 3
Dependent Claim
14 words
The rotor of claim 1 wherein the damper turns are above the field windings.
Claim 4
Dependent Claim
13 words
The rotor of claim 1 wherein the damper turns are individual insulated conductors.
Claim 5
Dependent Claim
97 words
In a generating system having a plurality of alternator channels, each channel having an alternator and each alternator having a rotor and a stator, the stators of the alternators being connected in parallel for providing current to a load, the rotors of the alternators being coupled to prime movers, each rotor having N number of poles, field winding recesses between adjacent poles, field windings wound around the N poles and located in the recesses, the improvement comprising: damper turns on each rotor for providing a short circuit current path linking alternate pairs of poles on the rotor.
Claim 6
Dependent Claim
97 words
In a generating system having a plurality of alternator channels, each channel having an alternator and each alternator having a rotor and a stator, the stators of the alternators being connected in parallel for providing current to a load, the rotors of the alternators being coupled to prime movers, each rotor having N number of poles, field winding recesses between adjacent poles, field windings wound around the N poles and located in the recesses, the improvement comprising: damper turns on each rotor for providing a short circuit current path linking alternate pairs of poles on the rotor.
Claim 7
Dependent Claim
18 words
The generating system of claim 4 wherein the damper turns are between the field windings and the stator.
Claim 8
Dependent Claim
21 words
The generating system of claim 5 wherein the damper turns include: N insulated conductors, each conductor wrapped around two adjacent poles.
Claim 9
Dependent Claim
15 words
The generating system of claim 6 wherein each conductor is a single strand of wire.
Claim 10
Dependent Claim
29 words
The generating system of claim 4 wherein the N poles have circumferentially extending lips at their ends and the damper turns are under the lips above the field windings.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |