US3792297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reluctance machine having equalizing windings
Assignee: ABB Norden Holding AB
•
Filing: 1971-12-30
•
Granted: 1974-02-12
•
Expires: 1991-12-30
Abstract
Abstract A reluctance machine has a stator with a plurality of stator poles arranged tangentially one after the other and carries at least one stator winding. The rotor has a plurality of pole pairs equally angularly spaced. The rotor has an equalizing winding composed of coils in the form of a hollow cylinder of conductive material provided with longitudinal slots extending alternately from opposite ends receiving the rotor poles, the parts of the cylinder between the slots being joined at alternate ends by arcuate parts, the induced voltages in the coils counteracting each other.
Inventors
- 👤 V Torok
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:23
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/18; H02K3/20; H02K19/00; H02K19/02; H02K19/10; H02K19/103
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
Reluctance machine comprising a stator having a plurality of stator poles arranged tangentially one after the other and carrying at least one stator winding, and a rotor having a number of pole pairs, the angular position of one of the rotor poles of a pair in relation to its neighboring stator poles always being the same as that of the other rotor pole of the pair, in which at least one rotor pole pair is provided with a short-circuited equalizing winding comprising one coil for each pole and means series-connecting the two coils, said connecting means being connected between coil ends of equal polarities as regards voltages induced in the two coils upon a movement of the rotor.
Claim 2
Dependent Claim
118 words
Reluctance machine comprising a stator having a plurality of stator poles arranged tangentially one after the other and carrying at least one stator winding, and a rotor having a number of pole pairs, the angular position of one of the rotor poles of a pair in relation to its neighboring stator poles always being the same as that of the other rotor pole of the pair, in which at least one rotor pole pair is provided with a short-circuited equalizing winding comprising one coil for each pole and means series-connecting the two coils, said connecting means being connected between coil ends of equal polarities as regards voltages induced in the two coils upon a movement of the rotor.
Claim 3
Dependent Claim
37 words
Reluctance machine according to claim 1, in which the machine has three pairs of diametrically arranged stator poles and two pairs of diametrically arranged rotor poles, the stator carrying a stator winding for each stator pole pair.
Claim 4
Dependent Claim
49 words
Reluctance machine according to claim 1, in which said equalizing winding comprises a hollow cylinder made of conducting material and having slots extending inwardly alternately from each end for receiving the rotor poles, the axial extension of said slots constituting only a part of the length of the cylinder.
References Cited (Backward Citations)
US767787A
Cited
US1607287A
Cited
US1783064A
Cited
US2037532A
Cited
US2831133A
Cited
US3163788A
Cited
US3230487A
Cited
US3408556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |