GB1380596A - Device for supplying a load with a constant voltage - Google Patents
Device for supplying a load with a constant voltageInfo
- Publication number
- GB1380596A GB1380596A GB4166572A GB4166572A GB1380596A GB 1380596 A GB1380596 A GB 1380596A GB 4166572 A GB4166572 A GB 4166572A GB 4166572 A GB4166572 A GB 4166572A GB 1380596 A GB1380596 A GB 1380596A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- lamp
- transistor
- current
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
- G05F1/569—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
1380596 Automatic control of voltage and current SAFT-SOC DES ACCUMULATEURS FIXES ET DE TRACTION 7 Sept 1972 [10 Sept 1971] 41665/72 Heading G3R [Also in Division H2] A D. C. circuit includes a regulation and cut-off device connected in series between a source and load. The voltage across the load is sensed and regulated by controlling the series device, and the latter is caused to cut off the supply if the load voltage falls below a predetermined value. A further circuit senses the load current and actuates the regulation device if the current tends to exceed a given limit. In the arrangement shown, a lamp L is supplied by a battery 1 through power transistors Q6, Q7 connected in Darlington relation with a transistor Q8. A voltage regulator circuit 4 compares the lamp voltage, sensed by a potentiometer comprising transistor Q3 and resistors R 1 , P 1 , R 2 , with a Zener diode DZ1 and controls transistor Q8 accordingly to regulate the lamp voltage. If the latter should decrease excessively, a Zener diode DZ2 is blocked and transistor Q3 turns off so that transistor Q8 ceases to be energized and the supply to the lamp is cut off, thus preventing over-discharge of the battery. The charging of a capacitor C2 enables the circuit to start up when contacts S1 are closed. A current-limiting circuit 3 senses the voltage drop across resistors R25, R26, and excessive current causes transistors Q9, Q10 to turn on and reduce the base bias of transistor Q8, thus limiting the lamp current. If this action reduces the voltage across the lamp sufficiently, the supply is cut off by the voltage regulator as before to prevent damage to the lamp and battery.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7132719A FR2152395B1 (en) | 1971-09-10 | 1971-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1380596A true GB1380596A (en) | 1975-01-15 |
Family
ID=9082769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4166572A Expired GB1380596A (en) | 1971-09-10 | 1972-09-07 | Device for supplying a load with a constant voltage |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE788485A (en) |
| DE (1) | DE2244465A1 (en) |
| FR (1) | FR2152395B1 (en) |
| GB (1) | GB1380596A (en) |
| IT (1) | IT967298B (en) |
| LU (1) | LU65995A1 (en) |
| NL (1) | NL7212215A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0204978B1 (en) * | 1985-05-21 | 1992-01-08 | Fujitsu Limited | Shutdown control means for an electric power supply |
-
0
- BE BE788485D patent/BE788485A/en unknown
-
1971
- 1971-09-10 FR FR7132719A patent/FR2152395B1/fr not_active Expired
-
1972
- 1972-09-05 LU LU65995D patent/LU65995A1/xx unknown
- 1972-09-07 GB GB4166572A patent/GB1380596A/en not_active Expired
- 1972-09-08 NL NL7212215A patent/NL7212215A/xx not_active Application Discontinuation
- 1972-09-09 IT IT2899372A patent/IT967298B/en active
- 1972-09-11 DE DE19722244465 patent/DE2244465A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| LU65995A1 (en) | 1973-03-12 |
| DE2244465A1 (en) | 1973-03-15 |
| BE788485A (en) | 1973-03-07 |
| FR2152395B1 (en) | 1974-03-29 |
| IT967298B (en) | 1974-02-28 |
| FR2152395A1 (en) | 1973-04-27 |
| NL7212215A (en) | 1973-03-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |