Patent US3601670A successfully refreshed from Google Patents.
US3601670A
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US
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Plural motor driving system adapted for regenerative braking
Assignee: ABB Norden Holding AB
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Filing: 1970-04-20
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Granted: 1971-08-24
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Expires: 1990-04-20
Abstract
Abstract A driving system adapted for regenerative braking having two DC motors each having two series wound field windings. The motors and one field winding from each motor are connected in a bridge circuit to a DC source to provide for changing from motor to generator conditions. the other two field windings are connected in series with each other and with the DC source in a diagonal of the bridge. The motors are controlled in response to the average value of motor current.
Inventors
- 👤 Lars Goran Eriksson
- 👤 Karl-Gunnar Goliath
- 👤 Bo Ingemar Larsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:18
CPC Classifications
H; H02; H02P; H02P3/00; H02P3/06; H02P3/08; H02P3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
Driving system of regenerative braking comprising a bridge circuit having first, second, third and fourth sides (AB, BC, CD, DA) and first and second diagonals (AC BD), the first and third sides being opposite each other, two DC series machines having their rotors (1,2) connected in the second and fourth sides, respectively, each machine having first and second field windings (1a, 1b, 2a, 2b), the first field windings (1a,2a) being connected in the first and third sides, respectively, a current source (3,4) switching means (8,12) for connecting said current source in the second diagonal during motor operation and in the first diagonal during braking, the second field windings being connected in the second diagonal, rectifier means (6,7) in each of said diagonals, a periodically operating switching device (9) for short-circuiting said rectifier means, and means (10) responsive to variations in a variable of said circuit to control the operation of said switching device.
Claim 2
Dependent Claim
153 words
Driving system of regenerative braking comprising a bridge circuit having first, second, third and fourth sides (AB, BC, CD, DA) and first and second diagonals (AC BD), the first and third sides being opposite each other, two DC series machines having their rotors (1,2) connected in the second and fourth sides, respectively, each machine having first and second field windings (1a, 1b, 2a, 2b), the first field windings (1a,2a) being connected in the first and third sides, respectively, a current source (3,4) switching means (8,12) for connecting said current source in the second diagonal during motor operation and in the first diagonal during braking, the second field windings being connected in the second diagonal, rectifier means (6,7) in each of said diagonals, a periodically operating switching device (9) for short-circuiting said rectifier means, and means (10) responsive to variations in a variable of said circuit to control the operation of said switching device.
References Cited (Backward Citations)
US1726276A
Cited
US3069606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |