US3715602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for braking a vehicle
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1972-03-20
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Granted: 1973-02-06
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Expires: 1992-03-20
Abstract
Abstract A circuit arrangement for the combined net and resistance braking of an electrically driven vehicle is fed via a pair of lines from a direct current power system. A capacitor is connected across the pair of lines, as is a resistive braking circuit composed of a series arrangement of a braking resistor and a controllable switch. A voltage regulating circuit having its input connected in parallel with the capacitor and its output coupled to the control input of the controllable switch is arranged to develop a control signal upon the occurrence of a voltage across the capacitor which exceeds slightly the rated voltage of the pair of lines.
Inventors
- 👤 U Putz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:26
CPC Classifications
B; B60; B60L; B60L7/00; B60L7/22
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
194 words
A circuit arrangement for the combined net and resistance braking of an electrically driven vehicle fed via a pair of lines from a direct current power system comprising, in combination: a motor means for driving the vehicle, a controllable switching circuit means for coupling said motor means across said pair of lines, a capacitive means coupled across said pair of lines; a resistive braking circuit connected in parallel with said capacitive means, said resistive braking circuit including a resistance means and a controllable switch means connected in series with one another, said controllable switch means having a control input; voltage regulating circuit means having an input means and an output means, said input means being connected in parallel with said capacitive means and responsive to the voltage appearing across said capacitive means for developing a control signal across its output means upon the occurrence of a voltage across said capacitive means which exceeds slightly the rated voltage of said pair of lines; and means for coupling said output means of said voltage regulating circuit means to said control input of said controllable switching means for maintaining the voltage across said capacitive means substantially constant.
Claim 2
Dependent Claim
194 words
A circuit arrangement for the combined net and resistance braking of an electrically driven vehicle fed via a pair of lines from a direct current power system comprising, in combination: a motor means for driving the vehicle, a controllable switching circuit means for coupling said motor means across said pair of lines, a capacitive means coupled across said pair of lines; a resistive braking circuit connected in parallel with said capacitive means, said resistive braking circuit including a resistance means and a controllable switch means connected in series with one another, said controllable switch means having a control input; voltage regulating circuit means having an input means and an output means, said input means being connected in parallel with said capacitive means and responsive to the voltage appearing across said capacitive means for developing a control signal across its output means upon the occurrence of a voltage across said capacitive means which exceeds slightly the rated voltage of said pair of lines; and means for coupling said output means of said voltage regulating circuit means to said control input of said controllable switching means for maintaining the voltage across said capacitive means substantially constant.
Claim 3
Dependent Claim
194 words
A circuit arrangement for the combined net and resistance braking of an electrically driven vehicle fed via a pair of lines from a direct current power system comprising, in combination: a motor means for driving the vehicle, a controllable switching circuit means for coupling said motor means across said pair of lines, a capacitive means coupled across said pair of lines; a resistive braking circuit connected in parallel with said capacitive means, said resistive braking circuit including a resistance means and a controllable switch means connected in series with one another, said controllable switch means having a control input; voltage regulating circuit means having an input means and an output means, said input means being connected in parallel with said capacitive means and responsive to the voltage appearing across said capacitive means for developing a control signal across its output means upon the occurrence of a voltage across said capacitive means which exceeds slightly the rated voltage of said pair of lines; and means for coupling said output means of said voltage regulating circuit means to said control input of said controllable switching means for maintaining the voltage across said capacitive means substantially constant.
Claim 4
Dependent Claim
194 words
A circuit arrangement for the combined net and resistance braking of an electrically driven vehicle fed via a pair of lines from a direct current power system comprising, in combination: a motor means for driving the vehicle, a controllable switching circuit means for coupling said motor means across said pair of lines, a capacitive means coupled across said pair of lines; a resistive braking circuit connected in parallel with said capacitive means, said resistive braking circuit including a resistance means and a controllable switch means connected in series with one another, said controllable switch means having a control input; voltage regulating circuit means having an input means and an output means, said input means being connected in parallel with said capacitive means and responsive to the voltage appearing across said capacitive means for developing a control signal across its output means upon the occurrence of a voltage across said capacitive means which exceeds slightly the rated voltage of said pair of lines; and means for coupling said output means of said voltage regulating circuit means to said control input of said controllable switching means for maintaining the voltage across said capacitive means substantially constant.
Claim 5
Dependent Claim
16 words
A circuit as defined in claim 1 wherein said controllable switch means is a semiconductor switch.
Claim 6
Dependent Claim
67 words
A circuit as defined in claim 1 wherein said voltage regulating circuit means is a pulse producing circuit responsive to the voltage across said capacitive means and which produces as the control signal pulses of varying width, the width of the pulses depending on the voltage appearing across said capacitive means in excess of a voltage level slightly above the rated voltage of said pair of lines.
Claim 7
Dependent Claim
48 words
A circuit as defined in claim 1 wherein said voltage regulating circuit means is a regulator circuit which produces as the control signal a direct voltage signal whenever the voltage across said capacitive means exceeds a voltage level slightly above the rated voltage of said pair of lines.
Claim 8
Dependent Claim
19 words
A circuit as defined in claim 3 wherein said pulse producing circuit produces pulses having a given repetition rate.
Claim 9
Dependent Claim
68 words
A circuit as defined in claim 1 wherein said motor means is a direct current motor and wherein said controllable switching circuit means is a thyristor including its selfcommutating circuit means for coupling energy from the direct current motor means to said capacitive means and said pair of lines during braking and for coupling energy from said pair of lines to said direct current motor means during running.
Claim 10
Dependent Claim
53 words
A circuit as defined in claim 6 further comprising circuit means coupled to said controllable switching circuit means for intermittently activating said controllable switching circuit means at a set repetition rate whereby said direct current motor means is coupled across said pair of lines and said capacitive means at the set repetition rate.
Claim 11
Dependent Claim
70 words
A circuit as defined in claim 5 wherein said motor means is a direct current motor, and said controllable switching circuit means is a thyristor including its selfcommutating circuit means; and further comprising circuit means coupled to said controllable switching circuit means for intermittently activating said controllable switching circuit means at a set repetition rate, said given repetition rate being a fixed and whole number multiple of said set rate.
Claim 12
Dependent Claim
75 words
A circuit as defined in claim 1 wherein said motor means is an alternating motor means and wherein said controllable switching circuit means includes converter means for converting direct current from said pair of lines into alternating current as input to said alternating current motor means during running and for converting alternating current from said alternating current motor means into direct current as input to said pair of liNes and said capacitive means during braking.
Claim 13
Dependent Claim
29 words
A circuit as defined in claim 9 further comprising circuit means coupled to said converter means for intermittently activating said converter means at a set repetition rate during braking.
Claim 14
Dependent Claim
53 words
A circuit as defined in claim 10 wherein said voltage regulating circuit means is a pulse producing circuit responsive to the voltage across said capacitive means and which produces as the control signal pulses of given repetition rate, said given repetition rate being a fixed whole number multiple of said set repetition rate.
Claim 15
Dependent Claim
51 words
A circuit as defined in claim 11 wherein said pulse producing circuit produces as the control signal pulses of varying width, the width of the pulses depending on the voltage appearing across said capacitive means in excess of a voltage level slightly above the rated voltage of said pair of lines.
References Cited (Backward Citations)
US3371253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |