Patent US3792325A successfully refreshed from Google Patents.
US3792325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thyristor control for a plurality of motors
Assignee: Bombardier Transportation Holdings USA Inc
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Filing: 1973-03-30
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Granted: 1974-02-12
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Expires: 1993-03-30
Abstract
Abstract A plurality of motors, such as traction motors, are provided voltage from at least one voltage source. In the thyristor control circuit, a given thyristor provides current to a load, for example at least one motor, having a current capacity no greater than the current capacity of the given thyristor.
Inventors
- 👤 K Berger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:33
CPC Classifications
B; B60; B60L; B60L9/00; B60L9/02; B60L9/08; B60L9/12; H; H02; H02P; H02P5/00; H02P5/68; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
202 words
In combination: at least one source of power having first and second terminals; first and second motors, each having first and second terminals; first and second switches, with said first switch being connected between the first terminal of said one source and the first terminal of said first motor, and said second switch being connected between the second terminal of said one source and the first terminal of said first motor; third and fourth switches, with said third switch being connected between the first terminal of said one source and the first terminal of said second motor, and said fourth switch being connected between the second terminal of said one source and the first terminal of said second motor; means for selectively closing said first, second, third and fourth switches for applying power to said first and second motors; and means for causing current flow from the second terminal of said first and second motors to the second terminal of said one source whenever the first or third switch is closed, and for causing current flow from the second terminal of said first and second motors to the first terminal of said one source whenever the second or fourth switch is closed.
Claim 2
Dependent Claim
202 words
In combination: at least one source of power having first and second terminals; first and second motors, each having first and second terminals; first and second switches, with said first switch being connected between the first terminal of said one source and the first terminal of said first motor, and said second switch being connected between the second terminal of said one source and the first terminal of said first motor; third and fourth switches, with said third switch being connected between the first terminal of said one source and the first terminal of said second motor, and said fourth switch being connected between the second terminal of said one source and the first terminal of said second motor; means for selectively closing said first, second, third and fourth switches for applying power to said first and second motors; and means for causing current flow from the second terminal of said first and second motors to the second terminal of said one source whenever the first or third switch is closed, and for causing current flow from the second terminal of said first and second motors to the first terminal of said one source whenever the second or fourth switch is closed.
Claim 3
Dependent Claim
44 words
The combination claimed in claim 1, including: a second source of power having first and second terminals and being connected in series with said second switch and said first motor, and also being connected in series with said fourth switch and said second motor.
Claim 4
Dependent Claim
82 words
The combination claimed in claim 2 including: a first diode having cathode and anode electrodes, with one of the electrodes being connected to the first terminal of said first motor and the remaining electrode being connected to the first terminal of said second source; and a second diode having cathode and anode electrodes, with one of the electrodes being connected to the first terminal of said first motor and the remaining electrode being connected to the second terminal of said second source.
Claim 5
Dependent Claim
82 words
The combination claimed in claim 3 including: a third diode having cathode and anode electrodes, with one of the electrodes being connected to the first terminal of said second motor and the remaining electrode being connected to the first terminal of said second source; and a fourth diode having cathode and anode electrodes, with one of the electrodes being connected to the first terminal of said second motor and the remaining electrode being connected to the second terminal of said second source.
Claim 6
Dependent Claim
220 words
In combination: at least one source of power having first and second terminals; first and second motors, each having first and second terminals; first and second thyristors, with said first thyristor being connected between the first terminal of said one source and the first terminal of said first motor, and said second thyristor being connected between the second terminal of said one source and the first terminal of said first motor; third and fourth thyristors, with said third thyristor being connected between the first terminal of said source and the first terminal of said second motor, and said fourth thyristor being connected between the second terminal of said source and the first terminal of said second motor; means for selectively firing said first, second, third and fourth thyristors for applying current to said first and second motors; a first diode having cathodE and anode electrodes, with one of the electrodes being connected to the second terminal of said first and second motors and including means for connecting the remaining electrode to the second terminal of said one source; and a second diode having cathode and anode electrodes, with one of the electrodes being connected to the second terminal of said first and second motors and including means for connecting the remaining electrode to the first terminal of said one source.
Claim 7
Dependent Claim
220 words
In combination: at least one source of power having first and second terminals; first and second motors, each having first and second terminals; first and second thyristors, with said first thyristor being connected between the first terminal of said one source and the first terminal of said first motor, and said second thyristor being connected between the second terminal of said one source and the first terminal of said first motor; third and fourth thyristors, with said third thyristor being connected between the first terminal of said source and the first terminal of said second motor, and said fourth thyristor being connected between the second terminal of said source and the first terminal of said second motor; means for selectively firing said first, second, third and fourth thyristors for applying current to said first and second motors; a first diode having cathodE and anode electrodes, with one of the electrodes being connected to the second terminal of said first and second motors and including means for connecting the remaining electrode to the second terminal of said one source; and a second diode having cathode and anode electrodes, with one of the electrodes being connected to the second terminal of said first and second motors and including means for connecting the remaining electrode to the first terminal of said one source.
Claim 8
Dependent Claim
51 words
The combination claimed in claim 5 including: means for connecting a third diode between the first terminal of said one source and the first terminal of said first motor; and means for connecting a fourth diode between the second terminal of said one source and the first terminal of said motor.
Claim 9
Dependent Claim
52 words
The combination claimed in claim 6 including: means for connecting a fifth diode between the first terminal of said one source and the first terminal of said second motor; and means for connecting a sixth diode between the second terminal of said one source and the first terminal of said second motor.
Claim 10
Dependent Claim
44 words
The combination claimed in claim 7 including: a second source of power having first and second terminals and being connected in series with said second thyristor and said first motor, and also being connected in series with said fourth thyristor and said second motor.
References Cited (Backward Citations)
US1336561A
Cited
US3621270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |