GB918466A - Improvements in voltage-regulated power supplies incorporating current limiting circuits - Google Patents
Improvements in voltage-regulated power supplies incorporating current limiting circuitsInfo
- Publication number
- GB918466A GB918466A GB254/60A GB25460A GB918466A GB 918466 A GB918466 A GB 918466A GB 254/60 A GB254/60 A GB 254/60A GB 25460 A GB25460 A GB 25460A GB 918466 A GB918466 A GB 918466A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- transistor
- conductive
- resistor
- current
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
-
- 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
- G05F1/573—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 with overcurrent detector
-
- 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
- G05F1/573—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 with overcurrent detector
- G05F1/5735—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 with overcurrent detector with foldback current limiting
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)
Abstract
918,466. Automatic voltage control systems. AMPEX CORPORATION. Jan. 4, 1960 [Jan. 19, 1959], No. 254/60. Class 38 (4). In a voltage-regulating power supply incorporating a current-limiting circuit a regulating element and an amplifying element form a bistable circuit having a normal condition wherein the regulating element is conductive and the amplifying element is non-conductive, the bistable circuit being switched from the normal condition when the output current exceeds a predetermined value. As shown, the direct voltage across lines 39, 41 is maintained constant by a series regulating transistor 18, the base-emitter bias of which is controlled through a transistor 19 by a transistor 21 responsive to the difference between the constant voltage across a diode 26 and the voltage at a tapping 22 of a potentiometer 23 connected across the output lines 39, 41. The current in the line 41 is limited by a transistor 36 which is rendered conductive when the voltage drop across a resistor 46 exceeds the voltage across a resistor 37 of a potentiometer 37, 38. When the transistor 36 becomes conductive the transistor 18 is biased so as to reduce the voltage between lines 41, 39 and so limit the line current. The action is cumulative, since the voltage across resistor 37 falls with reduction in line voltage and the transistor is conductive for a lower line current. In a modification, the resistor 42 is inserted in line 39. In a further modification, a resistor is connected in series with a normally closed pushbutton switch between the junction of resistors 37, 38 and the collector of transistor 18. When transistor 36 conducts it is maintained conductive by the current through the switch and the circuit is restored to normal operation by opening the push-button switch.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US78744259A | 1959-01-19 | 1959-01-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB918466A true GB918466A (en) | 1963-02-13 |
Family
ID=25141485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB254/60A Expired GB918466A (en) | 1959-01-19 | 1960-01-04 | Improvements in voltage-regulated power supplies incorporating current limiting circuits |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS382940B1 (en) |
| DE (1) | DE1137776B (en) |
| FR (1) | FR1245906A (en) |
| GB (1) | GB918466A (en) |
| NL (3) | NL247513A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2867623A1 (en) * | 2004-03-09 | 2005-09-16 | Schneider Toshiba Inverter | Electric load e.g. relay, protection system for e.g. electronic circuit breaker, has electronic disjunction device with comparator block which measures voltage drop caused by PNP transistor |
| EP3242365A4 (en) * | 2015-01-22 | 2018-01-24 | Huawei Technologies Co., Ltd. | Current-limiting protection circuit and electronic device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1235410B (en) * | 1961-04-29 | 1967-03-02 | Fuba Werk Elektronischer Baute | Rectifier device |
| DE1290238C2 (en) * | 1966-09-22 | 1973-11-22 | Bölkow GmbH, 8012 Ottobrunn | ELECTRONIC SAFETY CIRCUIT FOR CURRENT LIMITING |
-
0
- NL NL217513D patent/NL217513A/xx unknown
- NL NL103424D patent/NL103424C/xx active
- NL NL247513D patent/NL247513A/xx unknown
-
1960
- 1960-01-04 GB GB254/60A patent/GB918466A/en not_active Expired
- 1960-01-16 DE DEA33714A patent/DE1137776B/en active Pending
- 1960-01-19 JP JP123060A patent/JPS382940B1/ja active Pending
- 1960-01-19 FR FR816055A patent/FR1245906A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2867623A1 (en) * | 2004-03-09 | 2005-09-16 | Schneider Toshiba Inverter | Electric load e.g. relay, protection system for e.g. electronic circuit breaker, has electronic disjunction device with comparator block which measures voltage drop caused by PNP transistor |
| EP3242365A4 (en) * | 2015-01-22 | 2018-01-24 | Huawei Technologies Co., Ltd. | Current-limiting protection circuit and electronic device |
| US10411464B2 (en) | 2015-01-22 | 2019-09-10 | Huawei Technologies Co., Ltd. | Current-limiting protection circuit and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| NL103424C (en) | |
| DE1137776B (en) | 1962-10-11 |
| NL217513A (en) | |
| FR1245906A (en) | 1960-11-10 |
| JPS382940B1 (en) | 1963-04-09 |
| NL247513A (en) |
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