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US4038575A Expired / Lapsed US ⏱️ 0.0 years remaining

Multi-phase generator

Assignee: Individual
•
Filing: 1974-03-18
•
Granted: 1977-07-26
•
Expires: 1994-03-18
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Abstract

Abstract A multi-phase generator without slip rings and brushes and with no windings in the rotor has its exciting winding and alternating current winding, with a mutual displacement of half a stator pole pitch, disposed in the stator. The generator has an even number of stator poles and a different number of rotor poles.

Inventors

  • 👤 Knut Assar Nordebo

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 18:29
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/16; H02K19/22; H02K19/24

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 188 words
A multi-phase induction generator including in combination, a rotor having a plurality of equally spaced poles but no windings thereon, a stator having a different number of equally spaced poles each provided with a single centrally disposed slot, said rotor and stator being mounted concentrically for relative rotation and with an air gap therebetween, a direct current energizable exciting winding mounted on said stator and encompassing each said stator pole for producing magnetic flux of the opposite sense in adjacent stator poles, and a multi-phase alternating current output winding mounted on said stator with the phase windings located respectively in the centrally disposed slots of adjacent stator poles thereby to achieve a mutual displacement of half a pole pitch between said exciting winding and said multi-phase output winding, said multi-phase output winding producing a multi-phase output voltage between beginning and end terminals of each stator phase winding, the number of stator poles being equal to m . p, the number of rotor poles being equal to m(p ± 1), m being an integer factor 1, 2, 3...., and p being an even integer 2, 4, 6 ... .
Claim 2
Dependent Claim 188 words
A multi-phase induction generator including in combination, a rotor having a plurality of equally spaced poles but no windings thereon, a stator having a different number of equally spaced poles each provided with a single centrally disposed slot, said rotor and stator being mounted concentrically for relative rotation and with an air gap therebetween, a direct current energizable exciting winding mounted on said stator and encompassing each said stator pole for producing magnetic flux of the opposite sense in adjacent stator poles, and a multi-phase alternating current output winding mounted on said stator with the phase windings located respectively in the centrally disposed slots of adjacent stator poles thereby to achieve a mutual displacement of half a pole pitch between said exciting winding and said multi-phase output winding, said multi-phase output winding producing a multi-phase output voltage between beginning and end terminals of each stator phase winding, the number of stator poles being equal to m . p, the number of rotor poles being equal to m(p ± 1), m being an integer factor 1, 2, 3...., and p being an even integer 2, 4, 6 ... .

References Cited (Backward Citations)

US2802123A Cited
US2827582A Cited
US2816240A Cited
US3041486A Cited
US3157810A Cited
US3408556A Cited
US3452229A Cited
US3422292A Cited
US3518473A Cited
US3767950A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-07-25 1981-01-24 1981-07-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-07-25 1985-01-24 1985-07-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-07-25 1989-01-24 1989-07-26 $7700.00 Window Closed / Lapsed

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