GB1412985A - Electric power supply circuits - Google Patents
Electric power supply circuitsInfo
- Publication number
- GB1412985A GB1412985A GB5042672A GB5042672A GB1412985A GB 1412985 A GB1412985 A GB 1412985A GB 5042672 A GB5042672 A GB 5042672A GB 5042672 A GB5042672 A GB 5042672A GB 1412985 A GB1412985 A GB 1412985A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transformer
- signal
- oscillator
- transistor
- output
- 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
- H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
1412985 Automatic voltage control G & E BRADLEY Ltd 26 Oct 1973 [1 Nov 1972] 50426/72 Heading G3R [Also in Division H2] A regulated power supply comprises a transformer whose primary winding energization is controlled by a switch operated by the output signal of an oscillator. The frequency of the oscillator is determined by a signal derived from a feedback winding on the transformer core, and the oscillator output is in the form of constant width pulses. As shown, battery input terminals 12, 13 are connected across primary winding 18 of transformer 19 and a switching transistor 17. The transformer also includes a number of secondary windings (21-24), Fig.2 (not shown), with associated rectifiers to produce different DC voltage levels, an electrostatic screen 67, a gapped ferrite core 20 and a feedback winding 25, the signal from which is compared with a Zener reference diode 27 and fed to an amplifier 28. The amplified signal controls the level of current delivered by a constant current source 26 which in turn controls the spacing of constant width pulses produced by an astable multi-vibrator 14. The pulses are amplified by transistor stages 30, 31 to form the control signal for transistor 17 such that the output voltage levels produced by the transformer are maintained constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5042672A GB1412985A (en) | 1972-11-01 | 1972-11-01 | Electric power supply circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5042672A GB1412985A (en) | 1972-11-01 | 1972-11-01 | Electric power supply circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1412985A true GB1412985A (en) | 1975-11-05 |
Family
ID=10455857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5042672A Expired GB1412985A (en) | 1972-11-01 | 1972-11-01 | Electric power supply circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1412985A (en) |
-
1972
- 1972-11-01 GB GB5042672A patent/GB1412985A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |