GB911862A - Improvements in transistor direct-current converters - Google Patents
Improvements in transistor direct-current convertersInfo
- Publication number
- GB911862A GB911862A GB2709859A GB2709859A GB911862A GB 911862 A GB911862 A GB 911862A GB 2709859 A GB2709859 A GB 2709859A GB 2709859 A GB2709859 A GB 2709859A GB 911862 A GB911862 A GB 911862A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- transformer
- relay
- output
- 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
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/338—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
- H02M3/3385—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement with automatic control of output voltage or current
- H02M3/3387—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement with automatic control of output voltage or current in a push-pull configuration
- H02M3/3388—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement with automatic control of output voltage or current in a push-pull configuration of the parallel type
-
- 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
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC converters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Inverter Devices (AREA)
Abstract
911,862. Transistor inverters. PHILIPS ELECTRICAL INDUSTRIES Ltd. Aug. 7, 1959 [Dec. 11, 1958; July 15, 1959], No. 27098/59. Class 40 (6). [Also in Group XXXV] In a transistor inverter of the type in which a transformer provides regenerative feed-back between the output and input of one or more transistors to cause a switching action to occur, excessive input current to or output current from the inverter causes a large current to flow in an auxiliary winding of the transformer so that the switching action ceases. Push-pull arranged transistors 1 feed a transformer 2 having a feed-back winding 5 and an output winding 7 which may be coupled to a filter to provide a sinusoidal output wave or to a rectifier and smoothing system 9, 10, 11 to provide a D.C. output voltage at 8. If, for example due to a heavy load, excessive current flows through the rectifier or through the transformer the voltage across a resistor 13 connected in the supply circuit rises sufficiently to cause a transistor 14 to conduct and operate a relay 19. Contact 16 of this relay short-circuits a winding 12 on the transformer so that the feed-back becomes insufficient to sustain oscillation. Contact 19 of the relay changes over from a position in which a capacitor 20 is charged from the supply 4 to a position in which the voltage across the capacitor is connected to the base of the transistor 14 so that the transistor remains conductive until the capacitor has discharged. When this occurs the transistor 14 becomes non- conductive and the relay 19 releases. If excessive current still flows, the relay is immediately operated again. Resistor 17 is adjustable to set the maximum allowable value of input current to the circuit. It is suggested that the transistor 14 could alternatively be controlled by connecting its base-emitter circuit across a capacitor 24 so that the transistor becomes conducting when the output current exceeds a predetermined value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU4039259 | 1959-07-15 | ||
| AU40392/58A AU231194B2 (en) | 1959-08-11 | Improvements in protective circuits ford. c. generators-using transistors andthe like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB911862A true GB911862A (en) | 1962-11-28 |
Family
ID=25625162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2709859A Expired GB911862A (en) | 1958-12-11 | 1959-08-07 | Improvements in transistor direct-current converters |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS3610568B1 (en) |
| DE (1) | DE1092549B (en) |
| FR (1) | FR1232167A (en) |
| GB (1) | GB911862A (en) |
-
1959
- 1959-08-07 GB GB2709859A patent/GB911862A/en not_active Expired
- 1959-08-07 DE DE1959N0017066 patent/DE1092549B/en active Pending
- 1959-08-08 JP JP2531459A patent/JPS3610568B1/ja active Pending
- 1959-08-10 FR FR802515A patent/FR1232167A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1232167A (en) | 1960-10-05 |
| DE1092549B (en) | 1960-11-10 |
| JPS3610568B1 (en) | 1961-07-14 |
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