US4458168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toothed reluctance synchro/resolver
Assignee: NSK Americas Inc
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Filing: 1983-09-12
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Granted: 1984-07-03
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Expires: 2003-09-12
Abstract
Abstract A synchro/resolver in which a plurality of primary windings and secondary windings are wound on separate stator pole pieces having projecting teeth, with the stator poles of the secondary windings being located between the stator pole pieces of the primary windings and further including a rotor with teeth which are juxtaposed to the stator teeth for differentially coupling magnetic flux generated in the primary windings to the secondary windings as a function of the position of the rotor's teeth vis-a-vis the stators' teeth.
Inventors
- 👤 Ross D. Welburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:30
CPC Classifications
H; H02; H02K; H02K24/00; H01; H01F; H01F29/00; H01F29/08; H01F29/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
Synchro/resolver apparatus comprising a stator assembly having a succession of pole pieces, each pole piece having a plurality of spaced apart pole piece teeth, a rotor having a plurality of pole piece teeth corresponding to the stator teeth and positioned juxtaposed to the stator poles, a plurality of primary windings, each being wound on a separate stator pole piece in such a fashion as to induce alternately polarized magnetic fields in each successive pole piece on which a primary winding is wound, and a plurality of secondary windings, each being wound on a separate stator pole piece intermediate the stator pole pieces on which the primary windings are wound.
Claim 2
Dependent Claim
109 words
Synchro/resolver apparatus comprising a stator assembly having a succession of pole pieces, each pole piece having a plurality of spaced apart pole piece teeth, a rotor having a plurality of pole piece teeth corresponding to the stator teeth and positioned juxtaposed to the stator poles, a plurality of primary windings, each being wound on a separate stator pole piece in such a fashion as to induce alternately polarized magnetic fields in each successive pole piece on which a primary winding is wound, and a plurality of secondary windings, each being wound on a separate stator pole piece intermediate the stator pole pieces on which the primary windings are wound.
Claim 3
Dependent Claim
85 words
Synchro/resolver apparatus as recited in claim 1 wherein the stator assembly is comprised of a first set and a second set of pole pieces, each on an opposite side of the rotor, the rotor having two sets of corresponding teeth, each set being juxtaposed to a separate one of the sets of stator pole piece teeth and wherein the primary windings are wound on the first set of stator pole pieces and the secondary windings are wound on the second set of stator pole pieces.
Claim 4
Dependent Claim
17 words
Synchro/resolver apparatus as recited in claim 1 wherein the stator assembly and the rotor are ring shaped.
Claim 5
Dependent Claim
55 words
Synchro/resolver apparatus as recited in claim 1 wherein the apparatus is integrally constructed with an electric motor having a laminated rotor and a laminated stator and further wherein the stator assembly and the rotor of the transducer apparatus are comprised of laminations having the same form as the laminations of the motor's stator and rotor.
Claim 6
Dependent Claim
71 words
Synchro/resolver apparatus as recited in claim 1 wherein the stator assembly is comprised of a single set of pole pieces arranged in a ring, the rotor is ring shaped and is concentric with respect to the stator assembly and has a plurality of teeth juxtaposed to the stator teeth, and wherein the primary windings are wound on alternate pole pieces and the secondary windings are wound on the in-between pole pieces.
Claim 7
Dependent Claim
22 words
Synchro/resolver apparatus as recited in claims 1, 2 or 5 wherein the primary coils are connected together in a plurality of phases.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |