Patent US3585398A successfully refreshed from Google Patents.
US3585398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brushless excitation of a steam turbine generator utilizing a driver acyclic generator
Assignee: General Electric Co
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Filing: 1969-10-13
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Granted: 1971-06-15
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Expires: 1989-10-13
Abstract
Abstract DC excitation for a steam turbine generator rotating at speeds of 1,800 to 3,600 revolutions per minute is provided by an acyclic generator mechanically joined to the rotor of the steam turbine generator by coaxial electrical conductors extending axially into the steam turbine generator rotor. At a location remote from the steam turbine generator, the outer coaxial conductor is divided into axially adjacent segmented sections by insulating discs of, for example, aluminum oxide, and the rotary halves of first and second liquid metal collectors of an acyclic generator are disposed on each segment to produce current flow in the outer coaxial conductor. The generated current then is conducted through the outer coaxial conductor to one terminal of the steam turbine generator field windings and the current returns to the acyclic generator through the inner coaxial conductor and a clamp electrically interconnecting the coaxial conductors at the ends of the conductors remote from the steam turbine generator. A suitably insulated stainless steel drum also is provided in an underlying attitude relative to the segmented portions of the outer coaxial conductor to support the acyclic generator rotor situated thereon.
Inventors
- 👤 Luke M Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:13
CPC Classifications
H; H02; H02K; H02K31/00; H02K31/04; H02K19/00; H02K19/16; H02K19/38
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
154 words
A steam turbine generator comprising a rotor of a steam driven generator, said rotor having field windings and an axially disposed hollow shaft of steel, an outer copper conductor inserted in said steel shaft at a coaxial attitude relative to said shaft, an inner copper conductor inserted within said outer copper conductor, means connecting said field windings to said inner and outer copper conductors, an acyclic generator having a rotor and a stator, said rotor of said acyclic generator including an electrical conductor coaxially disposed relative to said steam turbine generator rotor and mechanically joined to said inner and outer copper conductors, to drive said acyclic generator rotor upon rotation of said steam turbine rotor, liquid metal current collectors disposed along the length of said acyclic generator rotor and means for feeding current generated at said liquid current collectors to said inner and outer copper conductors to provide excitation power to said field windings.
Claim 2
Dependent Claim
154 words
A steam turbine generator comprising a rotor of a steam driven generator, said rotor having field windings and an axially disposed hollow shaft of steel, an outer copper conductor inserted in said steel shaft at a coaxial attitude relative to said shaft, an inner copper conductor inserted within said outer copper conductor, means connecting said field windings to said inner and outer copper conductors, an acyclic generator having a rotor and a stator, said rotor of said acyclic generator including an electrical conductor coaxially disposed relative to said steam turbine generator rotor and mechanically joined to said inner and outer copper conductors, to drive said acyclic generator rotor upon rotation of said steam turbine rotor, liquid metal current collectors disposed along the length of said acyclic generator rotor and means for feeding current generated at said liquid current collectors to said inner and outer copper conductors to provide excitation power to said field windings.
Claim 3
Dependent Claim
29 words
The invention claimed in claim 1 wherein a drum of stainless steel supports the outer conductor of said acyclic generator and insulates said outer conductor from said inner conductor.
Claim 4
Dependent Claim
19 words
The invention claimed in claim 2 wherein said drum is insulated from said outer conductor and said inner conductor.
Claim 5
Dependent Claim
119 words
A turbine generator comprising a rotor having field windings situated adjacent the periphery of said rotor, an acyclic generator having an electrically conductive rotor coaxially disposed relative to the rotor of said turbine generator, means mechanically joining said acyclic generator rotor to the rotor of said turbine generator to provide torque for said acyclic generator rotor, and conductive means disposed symmetrically about the axes of said acyclic generator and said turbine generator and said turbine generator rotors for transmitting current generated within said acyclic generator rotor to said field windings of said turbine generator, said conductive means being fixedly secured to said turbine generation rotor to rotate at a speed equal to the speed of said turbine generator rotor.
Claim 6
Dependent Claim
119 words
A turbine generator comprising a rotor having field windings situated adjacent the periphery of said rotor, an acyclic generator having an electrically conductive rotor coaxially disposed relative to the rotor of said turbine generator, means mechanically joining said acyclic generator rotor to the rotor of said turbine generator to provide torque for said acyclic generator rotor, and conductive means disposed symmetrically about the axes of said acyclic generator and said turbine generator and said turbine generator rotors for transmitting current generated within said acyclic generator rotor to said field windings of said turbine generator, said conductive means being fixedly secured to said turbine generation rotor to rotate at a speed equal to the speed of said turbine generator rotor.
Claim 7
Dependent Claim
94 words
A turbine generator according to claim 4 wherein said conductive means are inner and outer coaxial conductors, said outer coaxial conductor being divided into axial segments along the length of said conductor by an electrical insulator, liquid metal current collectors disposed in a circumferentially overlying attitude relative to said axial segments to produce current flow within said outer coaxial conductor, means connecting said coaxial conductors to the respective terminals of said turbine generator field windings and means electrically interconnecting the ends of said inner and outer conductors remote from said turbine generator field windings.
Claim 8
Dependent Claim
65 words
A turbine generator according to claim 5 wherein said turbine rotor is characterized by a hollow shaft extending axially from the end of said rotor proximate said acyclic generator, said inner and outer coaxial conductors are disposed axially within said extended shaft and further including support means disposed between said inner and outer coaxial conductors at the axial location of said liquid metal current collectors.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |