US4489258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propulsion system for vehicles with a d-c machine
Assignee: BBC Brown Boveri AG Germany
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Filing: 1983-02-03
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Granted: 1984-12-18
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Expires: 2003-02-03
Abstract
Abstract A propulsion system for vehicles, includes a d-c machine, an armature current control element connected to the d-c machine, an alternating member having an output side connected to the armature control element and having an input side, an armature current control device connected between the input side of the alternating member and the d-c machine for delivering a first armature current reference value to the alternating member, a maximum value formed connected between the input side of the alternating member and the d-c machine for receiving the value of the actual machine speed and the actual armature current from the d-c machine and for delivering a second maximally permissible armature current reference value to the alternating member, the alternating member passing on the smaller of the first and second armature current reference value to the armature current control element.
Inventors
- 👤 Hans Kahlen
- 👤 Jurgen Angelis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:54
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/281; H02P7/2815; B; B60; B60L; B60L3/00; B60L3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/921
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
138 words
Propulsion system for vehicles, comprising a d-c machine, an armature current control element connected to said d-c machine, an alternating member having an output side connected to said armature control element and having an input side, an armature current control device connected between said input side of said alternating member and said d-c machine for delivering a first armature current reference value to said alternating member, a maximum value former connected between said input side of said alternating member and said d-c machine for receiving the value of the actual machine speed and the actual armature current from said d-c machine and for delivering a second maximally permissible armature current reference value to said alternating member, said alternating member passing on the smaller of said first and second armature current reference values to said armature current control element.
Claim 2
Dependent Claim
138 words
Propulsion system for vehicles, comprising a d-c machine, an armature current control element connected to said d-c machine, an alternating member having an output side connected to said armature control element and having an input side, an armature current control device connected between said input side of said alternating member and said d-c machine for delivering a first armature current reference value to said alternating member, a maximum value former connected between said input side of said alternating member and said d-c machine for receiving the value of the actual machine speed and the actual armature current from said d-c machine and for delivering a second maximally permissible armature current reference value to said alternating member, said alternating member passing on the smaller of said first and second armature current reference values to said armature current control element.
Claim 3
Dependent Claim
14 words
Propulsion system according to claim 1, wherein said alternating member is a minimum selector.
Claim 4
Dependent Claim
58 words
Propulsion system according to claim 1, wherein said alternating member is a switch having a first input connected to said armature current control device, a second input receiving zero potential and an output connected to said armature current control element, and including a Schmitt trigger connected between said maximum value former and said switch, for addressing said switch.
Claim 5
Dependent Claim
22 words
Propulsion system according to claim 1, including a PT1 time delay member connected between said maximum value former and said d-c machine.
Claim 6
Dependent Claim
22 words
Propulsion system according to claim 2, including a PT1 time delay member connected between said maximum value former and said d-c machine.
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) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |