US3629636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternators utilizing two-phase t-connected windings to get three-phase output
Assignee: ZF International UK Ltd
•
Filing: 1970-03-25
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Granted: 1971-12-21
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Expires: 1990-03-25
Abstract
Abstract An alternator including a stator structure and a rotor structure the latter defining poles and the stator structure having stator slots equal to twice the number of poles there being disposed in the stator slots a two-phase winding which comprises a pair of windings which are disposed in the slots so that the voltages induced between the ends of the windings are in quadrature. The one winding has more turns than the other winding so that a three-phase output voltage is obtained at the ends of the windings.
Inventors
- 👤 William Frank Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:34
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/12; H02K21/14; H02K3/00; H02K3/04; H02K3/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
An electrical alternator for producing a three-phase output in which the phase voltages are spaced by an equal amount, the alternator comprising a stator structure, slots formed in the stator structure, output windings located in the slots, a rotor structure defining rotor poles and when rotated, producing a rotating magnetic field, said stator structure having two slots per rotor pole and the stator slots accommodating a two-phase winding which is T-connected to produce a three-phase output having substantially equal phase voltages.
Claim 2
Dependent Claim
81 words
An electrical alternator for producing a three-phase output in which the phase voltages are spaced by an equal amount, the alternator comprising a stator structure, slots formed in the stator structure, output windings located in the slots, a rotor structure defining rotor poles and when rotated, producing a rotating magnetic field, said stator structure having two slots per rotor pole and the stator slots accommodating a two-phase winding which is T-connected to produce a three-phase output having substantially equal phase voltages.
Claim 3
Dependent Claim
37 words
An alternator as claimed in claim 1 in which the two-phase winding comprises a pair of windings, said windings being disposed within the stator slots so that the voltages induced in the windings are in time quadrature.
Claim 4
Dependent Claim
36 words
An alternator as claimed in claim 2 in which one of the windings has more turns than the other, said one winding having a center tap to which is connected one end of the other winding.
Claim 5
Dependent Claim
29 words
An alternator as claimed in claim 3 in which the number of turns on the smaller winding is approximately 3/2 times the number of turns on the larger winding.
Claim 6
Dependent Claim
27 words
An alternator as claimed in claim 4 in which the winding having the greater number of turns is inserted in the stator slots before the other winding.
References Cited (Backward Citations)
US3107562A
Cited
US712737A
Cited
US2451945A
Cited
US2825830A
Cited
US3325661A
Cited
US3512065A
Cited
US3452229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |