Patent US3596105A successfully refreshed from Google Patents.
US3596105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Configuration for optimumization of starter-generator design
Assignee: United States Department of the Navy
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Filing: 1969-09-23
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Granted: 1971-07-27
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Expires: 1989-09-23
Abstract
Abstract A self-excited compound type DC starter-generator with automatic switching from long shunt excitation to short shunt excitation when the starter-generator changes its operation from that of a motor to that of a generator. A shunt field winding is connected by a pair of diodes to two different junctions on a serially connected armature winding and series field winding. The diodes have biases of opposite polarity applied that permit current flow through only one of the two diodes at a time. When the startergenerator changes from motor to generator operation the bias on the diodes is reversed causing current flow in the opposite diode.
Inventors
- 👤 Joseph D Segrest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:00
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; F; F02; F02N; F02N11/00; F02N11/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
140 words
A DC machine comprising: an armature winding adapted to operate as a motor or generator; a series field winding having one terminal thereof operatively connected to one terminal of said armature winding; a shunt field winding having one terminal thereof operatively connected to the other terminal of said armature winding; control means operatively connected to the other terminal of said shunt field winding and both terminals of said series field winding responsive to the direction of current through said series field winding for automatically establishing alternative electrical conductivity between said other terminal of said shunt field winding and wither terminal of said series field winding; and a pair of input-output terminals operatively connected across said other terminals of said series field winding and said armature winding and adapted to be simultaneously connected to a power supply and an electrical load.
Claim 2
Dependent Claim
140 words
A DC machine comprising: an armature winding adapted to operate as a motor or generator; a series field winding having one terminal thereof operatively connected to one terminal of said armature winding; a shunt field winding having one terminal thereof operatively connected to the other terminal of said armature winding; control means operatively connected to the other terminal of said shunt field winding and both terminals of said series field winding responsive to the direction of current through said series field winding for automatically establishing alternative electrical conductivity between said other terminal of said shunt field winding and wither terminal of said series field winding; and a pair of input-output terminals operatively connected across said other terminals of said series field winding and said armature winding and adapted to be simultaneously connected to a power supply and an electrical load.
Claim 3
Dependent Claim
51 words
A DC machine according to claim 1 wherein said control means further comprises: a first diode operatively connected in series with said shunt field winding across said armature winding only; and a second diode operatively connected in series with said shunt winding across both said armature and said series field windings.
Claim 4
Dependent Claim
20 words
A DC machine according to claim 2 wherein said first and second diodes have the anodes thereof connected in common.
Claim 5
Dependent Claim
25 words
A DC machine according to claim 3 further comprising: a voltage regulator operatively connected in series with said shunt field winding across said armature winding.
Claim 6
Dependent Claim
186 words
A power system comprising, in combination: a power supply; a load connected across said power supply; an armature winding adapted to operate as a motor or generator and including a rotatable output shaft and one terminal operatively connected to one terminal of said power supply; an engine drivingly connected to said output shaft; a series field winding having one terminal thereof operatively connected to the other terminal of said armature winding and the other terminal thereof connected to the other terminal of said power supply; a shunt field winding having one terminal operatively connected to said one terminal of said armature winding; and control means operatively connected to the other terminal of said shunt field winding and both terminals of said series field winding responsive to the direction of current through said series field winding for automatically establishing electrical conductivity between said other terminal of said shunt field winding and said other terminal of said series field winding when said armature winding is operating as a motor and between said one terminal of said series field winding when said armature winding is operating as a generator.
Claim 7
Dependent Claim
186 words
A power system comprising, in combination: a power supply; a load connected across said power supply; an armature winding adapted to operate as a motor or generator and including a rotatable output shaft and one terminal operatively connected to one terminal of said power supply; an engine drivingly connected to said output shaft; a series field winding having one terminal thereof operatively connected to the other terminal of said armature winding and the other terminal thereof connected to the other terminal of said power supply; a shunt field winding having one terminal operatively connected to said one terminal of said armature winding; and control means operatively connected to the other terminal of said shunt field winding and both terminals of said series field winding responsive to the direction of current through said series field winding for automatically establishing electrical conductivity between said other terminal of said shunt field winding and said other terminal of said series field winding when said armature winding is operating as a motor and between said one terminal of said series field winding when said armature winding is operating as a generator.
Claim 8
Dependent Claim
51 words
A power system according to claim 5 wherein said control means further comprises: a first diode operatively connected in series with said shunt field winding across said armature winding only; and second diode operatively connected in series with said shunt winding across both said armature winding and said series field winding.
Claim 9
Dependent Claim
20 words
A power system according to claim 6 wherein said first and second diodes have the anodes thereof connected in common.
Claim 10
Dependent Claim
25 words
A power system according to claim 7 further comprising: a voltage regulator operatively connected in series with said shunt field winding across said armature winding.
Claim 11
Dependent Claim
129 words
In A DC machine capable of starting as a motor and shifting into a generator mode of operation wherein said DC machine having an armature winding in series with a series field winding and a shunt field winding in parallel across the series-connected armature and series field winding, the improvement comprising: a first diode connected in series with said shunt field winding, the series combination of said first diode and said shunt field winding being in parallel across said series-connected armature and said series field winding; and a second diode connected in series with said shunt field winding, and series combination of said second diode and said shunt field winding being in parallel with said armature winding, said first and second diodes having the anodes thereof connected in common.
Claim 12
Dependent Claim
129 words
In A DC machine capable of starting as a motor and shifting into a generator mode of operation wherein said DC machine having an armature winding in series with a series field winding and a shunt field winding in parallel across the series-connected armature and series field winding, the improvement comprising: a first diode connected in series with said shunt field winding, the series combination of said first diode and said shunt field winding being in parallel across said series-connected armature and said series field winding; and a second diode connected in series with said shunt field winding, and series combination of said second diode and said shunt field winding being in parallel with said armature winding, said first and second diodes having the anodes thereof connected in common.
Claim 13
Dependent Claim
128 words
In a DC machine capable of starting as a motor and shifting into a generator mode of operation wherein said DC machine having an armature winding in series with a series field winding and a shunt field winding in parallel across the series-connected armature and series field winding, the improvement comprising: a first diode connected in series with said shunt field winding, the series combination of said first diode and said shunt field winding being in parallel across said series-connected armature and said series field winding; and a second diode connected in series with said shunt field winding, the series combination of said second diode and said shunt field winding being in parallel with said armature winding, said first and second diodes having common polarity electrodes joined together.
Claim 14
Dependent Claim
128 words
In a DC machine capable of starting as a motor and shifting into a generator mode of operation wherein said DC machine having an armature winding in series with a series field winding and a shunt field winding in parallel across the series-connected armature and series field winding, the improvement comprising: a first diode connected in series with said shunt field winding, the series combination of said first diode and said shunt field winding being in parallel across said series-connected armature and said series field winding; and a second diode connected in series with said shunt field winding, the series combination of said second diode and said shunt field winding being in parallel with said armature winding, said first and second diodes having common polarity electrodes joined together.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |