Patent US3590290A successfully refreshed from Google Patents.
US3590290A
Expired / Lapsed
US
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Cooling systems for amortisseur windings of dynamo electric machines
Assignee: Cegelec SA
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Filing: 1969-12-08
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Granted: 1971-06-29
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Expires: 1989-12-08
Abstract
Abstract A fluid reservoir, centrally of a rotating shaft is interconnected with ducts formed in the interior of the amortisseur windings to cool the same by traversing the windings with fluid from the reservoir. The interconnection includes a plurality of turns, coaxial with the machine, for example located at the inside of the fluid reservoir and against the wall thereof, so that upon starting fluid will immediately be forced into the amortisseur windings without outside auxiliary pumps.
Inventors
- 👤 Gilbert Ruelle
- 👤 Roger Gillet
- 👤 Michel Tritsch
- 👤 Christian Lehuen
- 👤 Morduch Portnoi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:02
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
113 words
Means to cool a rotating amortisseur winding of electrical machines by circulating liquid therethrough comprising a reservoir of cooling fluid; cooling ducts formed inside of the amortisseur windings; a supply manifold connected to one of the ends of said cooling ducts and a removal manifold connected to the other end of said cooling ducts; and interconnections between said supply and removal manifolds and said reservoir, said manifolds being formed as a turn coaxial with the rotor of the machine, each, in which liquid circulates in the same sense, the supply and removal interconnections for liquid from the respective manifolds including terminations of said interconnections at the respective manifold at a similar radial position.
Claim 2
Dependent Claim
113 words
Means to cool a rotating amortisseur winding of electrical machines by circulating liquid therethrough comprising a reservoir of cooling fluid; cooling ducts formed inside of the amortisseur windings; a supply manifold connected to one of the ends of said cooling ducts and a removal manifold connected to the other end of said cooling ducts; and interconnections between said supply and removal manifolds and said reservoir, said manifolds being formed as a turn coaxial with the rotor of the machine, each, in which liquid circulates in the same sense, the supply and removal interconnections for liquid from the respective manifolds including terminations of said interconnections at the respective manifold at a similar radial position.
Claim 3
Dependent Claim
16 words
Means according to claim 1 wherein said manifolds form short circuit rings of the amortisseur cage.
Claim 4
Dependent Claim
62 words
Means according to claim 1 including interconnections betweEn said cooling ducts and said windings, wherein said interconnections are formed with a plurality of turns, coaxial with the axis of the rotor of the machine and serially traversed by the cooling fluid in its path between the reservoir and the ducts in the winding upon change in rate of rotation of said winding.
Claim 5
Dependent Claim
25 words
Means according to claim 3, wherein said turns in the interconnections are located in the interior of said reservoir and placed adjacent the walls thereof.
Claim 6
Dependent Claim
33 words
Means according to claim 3, including guide vanes located inside of the reservoir and rotating with the machine, and a connection opening to said turns of the interconnections located close to said vanes.
Claim 7
Dependent Claim
39 words
Means according to claim 3, including guide vanes located to be stationary with respect to the rotor of the machine, said guide vanes being located adjacent an opening formed in said interconnections between said cooling ducts and said reservoir.
Claim 8
Dependent Claim
17 words
Means according to claim 5, wherein said guide vanes are shaped in the involute of a circle.
Claim 9
Dependent Claim
12 words
Means according to claim 5, wherein said guide vanes are radially disposed.
Claim 10
Dependent Claim
23 words
Means according to claim 3, wherein said turns are formed as full rings, serially interconnected with respect to the path of circulating fluid.
Claim 11
Dependent Claim
111 words
Means according to claim 3, wherein the machine has a vertical shaft, the inlet to said turns is located near the bottom of the reservoir, said turns being serially connected to provide for passage of the fluid in said reservoir upwardly; and said interconnections include a supply manifold located at the bottom of said cooling ducts, said interconnections extending from the topmost turn to said supply manifold; an outlet manifold is provided at the upper points of said ducts; and the interconnections include a connection duct from said outlet manifold to said reservoir whereby, upon heating of said amortisseur windings, additional circulation of fluid will be caused due to thermosyphon action.
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |