Patent US4144468A successfully refreshed from Google Patents.
US4144468A
Expired / Lapsed
US
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Amplifying rotary electrical machine operating at rapidly variable frequencies and levels
Assignee: Thales SA
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Filing: 1977-10-25
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Granted: 1979-03-13
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Expires: 1997-10-25
Abstract
Abstract In a rotary electrical machine, in order to achieve an amplification effect with a high output level, the windings of a series of stators, aligned in front of a series of rotors, assembled upon one and the same axle, are connected to a common (earth) conductor across capacitors. In this fashion a filter made up of π-cells is obtained, whose amplification factor vis-a-vis a signal injected at the input of the machine, between earth and a terminal, is given by: ##EQU1## THIS FOR A MACHINE COMPRISING N rotors and N stators between said input and output, at which the amplified signal is picked off. L s designates the self-inductance of a stator, C the capacitance of the capacitors, and R the negative resistance which appears in operation within the winding of said stator.
Inventors
- 👤 Georges Mourier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:50
CPC Classifications
H; H02; H02K; H02K16/00; H02K99/00; H02K99/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
91 words
A rotary electrical machine comprising a series of rotors assembled upon one and the same axle and rotating about the axis thereof in operation, and a stator assembly, characterised in that said stator assembly is made up of elementary stators each arranged opposite one of said rotors and electrically equivalent in each case to self-inductances, said elementary stator being associated with storage elements in order to form cascade-connected cells each constituting a stator, successively passing the wave associated with alternating signals applied to the input of the first of said cells.
Claim 2
Dependent Claim
91 words
A rotary electrical machine comprising a series of rotors assembled upon one and the same axle and rotating about the axis thereof in operation, and a stator assembly, characterised in that said stator assembly is made up of elementary stators each arranged opposite one of said rotors and electrically equivalent in each case to self-inductances, said elementary stator being associated with storage elements in order to form cascade-connected cells each constituting a stator, successively passing the wave associated with alternating signals applied to the input of the first of said cells.
Claim 3
Dependent Claim
108 words
A rotary electrical machine as claimed in claim 1, characterised in that said self-inductances are each connected in series with one of the self-inductances of each of the other elementary stators; in that said self-inductances are connected to storage elements through which they are likwise connected to common conductors, said common conductors each forming in association with said series-connected self-inductances, a line having two input terminals and two output terminals; and in that between said input terminals there is connected a generator producing alternating signals, and between said output terminals a load in which there is picked off the wave corresponding to said signals propagated by said lines.
Claim 4
Dependent Claim
17 words
A rotary electrical machine as claimed in claim 1, characterised in that said storage elements are capacitors.
Claim 5
Dependent Claim
18 words
A rotary electrical machine as claimed in claim 1, characterised in that said storage elements are oscillatory circuits.
Claim 6
Dependent Claim
17 words
A rotary electrical machine as claimed in claim 3, characterised in that said capacitors are identical throughout.
Claim 7
Dependent Claim
28 words
A rotary electrical machine as claimed in claim 3, characterised in that the capacitances of said capacitors decrease working from the input towards the output of the machine.
References Cited (Backward Citations)
US2608623A
Cited
US2706269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-12 | 1982-09-11 | 1983-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-12 | 1986-09-11 | 1987-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-12 | 1990-09-11 | 1991-03-13 | $7700.00 | Window Closed / Lapsed |