Patent US3828233A successfully refreshed from Google Patents.
US3828233A
Expired / Lapsed
US
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Switching enabling two electrical machines to motor or regenerate with their armatures in parallel or in series
Assignee: Jeumont Schneider SA
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Filing: 1973-07-27
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Granted: 1974-08-06
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Expires: 1993-07-27
Abstract
Abstract System enabling two d.c. machines to change over rapidly from operation as series wound motors to operation as independently excited generators regenerating to a main power supply. The system mainly comprises a four-pole changeover and disconnecting switch which connects inductors in series either with their respective armature or with an auxiliary power supply, and four diodes shunted by four contactors. Of use in electric driving vehicles and locomotives for regenerative braking to the main power supply.
Inventors
- 👤 M Brulard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:30
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/281; B; B60; B60L; B60L2200/00; B60L2200/26; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
232 words
Changeover switching for the operation of two electrical machines as series-wound motors or as independently excited generators regenerating to the supply, with in both cases the possibility of parallel or series operation of the machines, characterized in that it comprises: A four-pole changeover and disconnecting switch enabling the machine field windings to be connected either in series with their respective armature or to an auxiliary d.c. supply; A first diode whose cathode is connected to the positive pole of the supply and whose anode is connected to the armature of the first machine; A second diode whose cathode is connected to the positive pole of the supply and whose anode is connected to two of the contacts of the changeover and disconnecting switch, the anode being connected, depending upon switch position, either to one side of the armature of the second machine or to the field winding thereof; A third diode whose cathode is connected to the other side of the armature of the second machine and whose anode is connected to the negative pole of the supply; A fourth diode whose cathode and anode are connected to the first-diode anode and to the third diode cathode respectively; Four contactors connected in parallel with the four diodes for parallel or series operations of the machines on motoring or generating, and Two rheostats for limiting and stabilizing the armature currents of the machines.
Claim 2
Dependent Claim
232 words
Changeover switching for the operation of two electrical machines as series-wound motors or as independently excited generators regenerating to the supply, with in both cases the possibility of parallel or series operation of the machines, characterized in that it comprises: A four-pole changeover and disconnecting switch enabling the machine field windings to be connected either in series with their respective armature or to an auxiliary d.c. supply; A first diode whose cathode is connected to the positive pole of the supply and whose anode is connected to the armature of the first machine; A second diode whose cathode is connected to the positive pole of the supply and whose anode is connected to two of the contacts of the changeover and disconnecting switch, the anode being connected, depending upon switch position, either to one side of the armature of the second machine or to the field winding thereof; A third diode whose cathode is connected to the other side of the armature of the second machine and whose anode is connected to the negative pole of the supply; A fourth diode whose cathode and anode are connected to the first-diode anode and to the third diode cathode respectively; Four contactors connected in parallel with the four diodes for parallel or series operations of the machines on motoring or generating, and Two rheostats for limiting and stabilizing the armature currents of the machines.
Claim 3
Dependent Claim
58 words
A changeover switching as claimed in claim 1, further characterized in that the two machines are connected in series to motor, by the changeover and disconnecting switch being placed in the position connecting each field in series with the armature of the corresponding machine and by closure of the contactors in parallel on the second and fourth diodes.
Claim 4
Dependent Claim
57 words
A changeover as claimed in claim 1, further characterized in that the two machines are connected in parallel to motor, by the changeover and disconnecting switch being placed in the position connecting each field in series with the armature of the corresponding machine and by closure of the contactors shunted across the first, second and third diodes.
Claim 5
Dependent Claim
45 words
A changeover as claimed in claim 1, further characterized in that the two machines connected in parallel to generated, by the changeover and disconnecting switch being placed in the position energizing the fields from an auxiliary d.c. supply and by keeping all the contactors open.
Claim 6
Dependent Claim
49 words
A changeover as claimed in claim 1, further characterized in that the two hmachines connected in series to generate, by the changeover and disconnecting switch being placed in the position energized the fields from an auxiliary d.c. supply and by closure of the contactor shunted across the fourth diode.
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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |