JPS55144776A - Power source - Google Patents
Power sourceInfo
- Publication number
- JPS55144776A JPS55144776A JP5364279A JP5364279A JPS55144776A JP S55144776 A JPS55144776 A JP S55144776A JP 5364279 A JP5364279 A JP 5364279A JP 5364279 A JP5364279 A JP 5364279A JP S55144776 A JPS55144776 A JP S55144776A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- transformer
- voltage detection
- set point
- secondary winding
- 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.)
- Pending
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
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
PURPOSE:To nearly maintain each voltage at plural output terminals at a set point despite of input variation by comparing the voltage of a secondary winding for voltage detection independently provided with a transformer with the set point wherein a power switching section is controlled in accordance with the voltage deviation. CONSTITUTION:A secondary winding 7-s for voltage detection which delivers no load current is independently provided with a transformer 5 and the voltage is converted into direct current by a voltage detection circuit 10 to compare with a set point. A power switching section 3 is controlled by a switching control section 4 which works by the voltage deviation originated in the above comparison value. The voltage across both terminals of the winding 7-s for voltage detection is directly proportional to the magnitude of magnetic flux variation of the transformer 5 as no load current is delivered from the secondary winding for voltage detection 7-s. The magnitude of magnetic flux variation of the transformer 5 is a function of the sum total of a voltage value of Ac power source 1 and load current. Therefore the output voltage at output terminals OUT1 or OUTn will be the same as a reference value.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5364279A JPS55144776A (en) | 1979-05-01 | 1979-05-01 | Power source |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5364279A JPS55144776A (en) | 1979-05-01 | 1979-05-01 | Power source |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55144776A true JPS55144776A (en) | 1980-11-11 |
Family
ID=12948548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5364279A Pending JPS55144776A (en) | 1979-05-01 | 1979-05-01 | Power source |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55144776A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6351587U (en) * | 1986-09-19 | 1988-04-07 | ||
CN112162166A (en) * | 2020-09-25 | 2021-01-01 | 珠海智融科技有限公司 | USB charging port no-load detection circuit and detection method thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5336624A (en) * | 1977-05-30 | 1978-04-05 | Hitachi Ltd | Invertor-type dc to dc convertor |
-
1979
- 1979-05-01 JP JP5364279A patent/JPS55144776A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5336624A (en) * | 1977-05-30 | 1978-04-05 | Hitachi Ltd | Invertor-type dc to dc convertor |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6351587U (en) * | 1986-09-19 | 1988-04-07 | ||
CN112162166A (en) * | 2020-09-25 | 2021-01-01 | 珠海智融科技有限公司 | USB charging port no-load detection circuit and detection method thereof |
CN112162166B (en) * | 2020-09-25 | 2022-02-25 | 珠海智融科技股份有限公司 | USB charging port no-load detection circuit and detection method thereof |
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