US3846690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for charging an electric power storage element to a predetermined voltage
Assignee: Alcatel Lucent SAS
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Filing: 1973-07-11
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Granted: 1974-11-05
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Expires: 1993-07-11
Abstract
Abstract A device for charging an electric power storage element to a predetermined voltage. This device comprises an induction coil comprising a primary winding connected to a continuous current source by a transistor, and a secondary winding connected to the condenser. The intensity of the current supplied to the coil is lower than a predetermined threshold value. This device comprises means for preventing the transistor from being conductive while the coil is discharging into the condenser.
Inventors
- 👤 R Colyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:19
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/338; H02M3/3385
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
226 words
A device for charging an electric power storage element to a predetermined voltage, said device comprising: a continuous electric current source, an induction coil comprising a primary winding, the ends of which are connected respectively to the terminals of said source to produce a charging current of this coil, and a secondary winding, the ends of which are connected respectively to the terminals of said storage element, an interrupter in series with said primary winding, control circuit means for controlling the opening and closing of said interrupter to produce by the opening of this interrupter the discharge into said electric power storage element of the charge of said coil, a first rectifier connected in series with said secondary winding, means sensitive to the charging voltage of said storage element to interrupt the charging of this storage element when this voltage reaches the predetermined value; said device further comprising: first means sensitive to the charging current of said coil and operative to open said interrupter when the intensity of the charging current reaches a predetermined threshold value, and second means sensitive to the discharging current of said coil in said storage element and operative to keep the interrupter open during the entire discharging operation, said control circuit means controlling said interrupter being operative to keep said interrupter closed when said first and second means are not operative.
Claim 2
Independent Claim
226 words
A device for charging an electric power storage element to a predetermined voltage, said device comprising: a continuous electric current source, an induction coil comprising a primary winding, the ends of which are connected respectively to the terminals of said source to produce a charging current of this coil, and a secondary winding, the ends of which are connected respectively to the terminals of said storage element, an interrupter in series with said primary winding, control circuit means for controlling the opening and closing of said interrupter to produce by the opening of this interrupter the discharge into said electric power storage element of the charge of said coil, a first rectifier connected in series with said secondary winding, means sensitive to the charging voltage of said storage element to interrupt the charging of this storage element when this voltage reaches the predetermined value; said device further comprising: first means sensitive to the charging current of said coil and operative to open said interrupter when the intensity of the charging current reaches a predetermined threshold value, and second means sensitive to the discharging current of said coil in said storage element and operative to keep the interrupter open during the entire discharging operation, said control circuit means controlling said interrupter being operative to keep said interrupter closed when said first and second means are not operative.
Claim 3
Dependent Claim
206 words
A device according to claim 1, characterized in that: said interrupter consists of a transistor comprising two main electrodes and an auxiliary electrode for the control thereof, said transistor being connected by its main electrodes in series with said primary winding in the charging circuit of said coil said control circuit means for controlling the opening and closing of said interrupter consisting of a control circuit designed to polarize the auxiliary electrode of said transistor, said first means sensitive to the charging current of said coil to open said interrupter, comprising a resistance in series in the charging circuit of said coil, a threshold circuit, the input of which is connected to the terminals of said resistance, this threshold circuit comprising a generator of a reference voltage, a comparator circuit and an amplifier, the output of this threshold circuit being connected to a first input of said control circuit, and in that said second means comprises a third winding magnetically coupled to the primary and secondary windings of said coil, this third winding being connected to a second input to said control circuit to keep said transistor open so long as the current induced in said third winding by the discharge current continues to flow therein.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |