GB845677A - Improvements in or relating to voltage regulator devices - Google Patents
Improvements in or relating to voltage regulator devicesInfo
- Publication number
- GB845677A GB845677A GB33872/57A GB3387257A GB845677A GB 845677 A GB845677 A GB 845677A GB 33872/57 A GB33872/57 A GB 33872/57A GB 3387257 A GB3387257 A GB 3387257A GB 845677 A GB845677 A GB 845677A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- generator
- emitter
- diode
- output voltage
- 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
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
- H02J7/16—Regulation of the charging current or voltage by variation of field
- H02J7/24—Regulation of the charging current or voltage by variation of field using discharge tubes or semiconductor devices
- H02J7/243—Regulation of the charging current or voltage by variation of field using discharge tubes or semiconductor devices with on/off action
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
845,677. Automatic voltage control systems. GENERAL MOTORS CORPORATION. Oct. 30, 1957 [Nov. 13, 1956], No. 33872/57. Class 38 (4). The output voltage of a D.C. generator, or it is stated, an A.C. generator or a saturable reactor stabilizer is maintained constant by using a transistor to switch the D.C. field (or control) current " on " or " off " in response to changes in output voltage. The transistor TR2 is in series with the field 20 of a selfexcited D.C. generator 22, and is controlled by a common-emitter driver transistor TR1. The base/emitter circuit of TR1 includes a Zener diode 28 and a portion of a potential divider R1, R2, R3 which is connected across the output of the generator 22. When the output voltage of the generator is low, diode 28 has a high resistance, transistor TR1 does not conduct, and transistor TR2 is fully conductive due to base current through resistor R5. When the output voltage rises, diode 28 passes Zener current, transistor TR1 conducts, thereby reducing the base current of transistor TR2 which becomes substantially non-conducting. The transition is assisted by positive feedback from the emitter of TR2 through resistor R4 to the base of TR1 and by transient feedback through capacitor 46. The emitter of TR2 is biased by a potential divider R6, R7 so that when the base current is reduced the emitter voltage is equal to the collector voltage in order to ensure complete cut-off. The diode 48 shunts the field 20 to reduce switching surges. Specifications 787,610 and 814,051 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US845677XA | 1956-11-13 | 1956-11-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB845677A true GB845677A (en) | 1960-08-24 |
Family
ID=22185784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33872/57A Expired GB845677A (en) | 1956-11-13 | 1957-10-30 | Improvements in or relating to voltage regulator devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB845677A (en) |
-
1957
- 1957-10-30 GB GB33872/57A patent/GB845677A/en not_active Expired
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