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US3866110A Expired / Lapsed US ⏱️ 0.0 years remaining

Electrical generation and control device

Assignee: Ercole Marelli and C SpA
•
Filing: 1973-11-13
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Granted: 1975-02-11
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Expires: 1993-11-13
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Abstract

Abstract An electric generation and control device, which comprises an inductor and an armature provided with a double three-phase winding. Each phase of the armature consists of a generation winding and of a smoothing and control winding, which is electrically in series relationship with the generation winding and both electrically and mechanically phase shifted in advance with respect thereto. The smoothing and control winding is formed by at least two turns in series as wound on two columns of at least a closed saturable core identified in the armature magnetic stack, the columns having such a cross-section and arrangement as to be cyclically saturable and unsaturable by the inductor flux. The spirals wound on the columns have such directions as to produce mutually additive fluxes, which are the one additive and the other subtractive with respect to the inductor flux. The saturable cores of contiguous phases are magnetically coupled to each other by bridges of magnetic material arranged so as to connect the cores mutually in parallel with respect to the inductor flux during the saturation of the same cores by the inductor flux. Several advantages, as higher speed of response, self-limitation of internal fault currents, self-limitation of external shortcircuit currents and inductor field flux relatively free of variation, are thus obtained with respect to prior art.

Inventors

  • 👤 Luigi Ruggeri

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 02:16
CPC Classifications
H; H02; H02K; H02K55/00; H02K19/00; H02K19/16; H02K19/36; H02K99/00; H02K99/10; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/869; Y10S505/87

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 227 words
An electric generation and control device comprising: a. an inductor, the influence area of whose flux is such as to involve at a time at least two contiguous phases simultaneously in the magnetic armature circuit; b. an armature having a double winding with at least three phases arranged on a magnetic stack of armature, each phase consisting of: a generating winding arranged so that the cyclical variations of the inductor flux induce an AC voltage therein; a smoothing and control winding electrically in series relationship with said generation winding and both electrically and mechanically phase shifted in advance with respect thereto, said smoothing and control winding being formed by at least two turns in series as wound on the two columns of at least a closed saturable core identified in the armature magnetic stack, said columns having such a crosssection and arrangement as to be cyclically saturable by the inductor flux, the spirals wound on said columns having such directions as to produce mutually additive fluxes, but the one additive and the other subtractive with respect to the inductor flux, the saturable cores of contiguous phases being magnetically coupled one to the other by bridges of a magnetic material arranged so as to connect said cores mutually in parallel with respect to the inductor flux during the saturation stage of the same cores by the inductor flux.
Claim 2
Dependent Claim 227 words
An electric generation and control device comprising: a. an inductor, the influence area of whose flux is such as to involve at a time at least two contiguous phases simultaneously in the magnetic armature circuit; b. an armature having a double winding with at least three phases arranged on a magnetic stack of armature, each phase consisting of: a generating winding arranged so that the cyclical variations of the inductor flux induce an AC voltage therein; a smoothing and control winding electrically in series relationship with said generation winding and both electrically and mechanically phase shifted in advance with respect thereto, said smoothing and control winding being formed by at least two turns in series as wound on the two columns of at least a closed saturable core identified in the armature magnetic stack, said columns having such a crosssection and arrangement as to be cyclically saturable by the inductor flux, the spirals wound on said columns having such directions as to produce mutually additive fluxes, but the one additive and the other subtractive with respect to the inductor flux, the saturable cores of contiguous phases being magnetically coupled one to the other by bridges of a magnetic material arranged so as to connect said cores mutually in parallel with respect to the inductor flux during the saturation stage of the same cores by the inductor flux.
Claim 3
Dependent Claim 23 words
A device according to claim 1, wherein the inductor pole shoes are circumferentially stepped, the number of steps being between one and infinity.
Claim 4
Independent Claim 15 words
A device according to which is electrically connected to the load through a diode rectifier.
Claim 5
Independent Claim 15 words
A device according to which is electrically connected to the load through a diode rectifier.
Claim 6
Dependent Claim 29 words
A device according to claim 3, wherein the rectifier is formed by diodes or diode groups connected to each other and to the generator as shown in FIG. 1.
Claim 7
Dependent Claim 35 words
A device according to claim 1, wherein the generation winding is mounted on a second magnetic stack which is separate from and coaxial with the one on which the smoothing and control winding is mounted.
Claim 8
Dependent Claim 17 words
A device according to claim 1, wherein the inductor magnetic field is a Ferraris magnetic rotary field.
Claim 9
Dependent Claim 24 words
A device according to claim 1, wherein the conductor used for the inductor winding is under superconductivity conditions as obtained by using cryogenic procedures.

References Cited (Backward Citations)

US2939069A Cited
US3248641A Cited
US3538422A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-02-10 1978-08-12 1979-02-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-02-10 1982-08-12 1983-02-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-02-10 1986-08-12 1987-02-11 $7700.00 Window Closed / Lapsed

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