Patent US4238822A successfully refreshed from Google Patents.
US4238822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controllable electrical single-armature of rotary converter
Assignee: Individual
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Filing: 1978-03-02
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Granted: 1980-12-09
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Expires: 1998-03-02
Abstract
Abstract Controllable electric rotary converter includes a drum armature winding having a plurality of partial coils, a multiplicity of electric switches consecutively connectible by a single pole with one of the input and output sides of the direct-current side of the drum armature winding for transmitting a current therethrough, a plurality of induction coils connectible with the electric switches and energizable by the current.
Inventors
- 👤 Walter Schade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:26
CPC Classifications
H; H02; H02K; H02K47/00; H02K47/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
Controllable electronic rotary converter without a collector, comprising a ring-shaped drum armature winding having a plurality of individual coil sections with inputs therebetween, a multiplicity of electronic switches consecutively connecting said coil-section inputs and having connection points, at least one of said connection points being connectible to a direct current source for switching said coil-section inputs to said electronic switches through a single pole, and a plurality of induction coils carrying outgoing current between said coil sections and a neutral star point which is further connected to a negative pole of the current source.
Claim 2
Dependent Claim
94 words
Controllable electronic rotary converter without a collector, comprising a ring-shaped drum armature winding having a plurality of individual coil sections with inputs therebetween, a multiplicity of electronic switches consecutively connecting said coil-section inputs and having connection points, at least one of said connection points being connectible to a direct current source for switching said coil-section inputs to said electronic switches through a single pole, and a plurality of induction coils carrying outgoing current between said coil sections and a neutral star point which is further connected to a negative pole of the current source.
Claim 3
Dependent Claim
32 words
Controllable rotary converter according to claim 1, wherein said induction coils are feedback windings effecting at least one of reinforcing, weakening and phase shift of the primary rotating field of the converter.
Claim 4
Dependent Claim
23 words
Controllable rotary converter according to claim 1, wherein said electronic switches are bidirectional and constitute phase-angle control of the current of the converter.
References Cited (Backward Citations)
US3858107A
Cited
US4024455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |