JPS63100994U - - Google Patents
Info
- Publication number
- JPS63100994U JPS63100994U JP19643386U JP19643386U JPS63100994U JP S63100994 U JPS63100994 U JP S63100994U JP 19643386 U JP19643386 U JP 19643386U JP 19643386 U JP19643386 U JP 19643386U JP S63100994 U JPS63100994 U JP S63100994U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- diode
- power transformer
- secondary winding
- output terminal
- 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
- 238000004804 winding Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Rectifiers (AREA)
- Control Of Electrical Variables (AREA)
- Power Conversion In General (AREA)
Description
図は本考案の電源切換回路図である。
１……電源トランス、２……一次側巻線、３…
…中間端子、４……二次側巻線、５……第１ダイ
オード、６……第２ダイオード、７……出力端子
、８……スイツチングトランジスタ、９，１０…
…第１、第２制御トランジスタ。
The figure is a power supply switching circuit diagram of the present invention. 1...Power transformer, 2...Primary winding, 3...
... intermediate terminal, 4 ... secondary winding, 5 ... first diode, 6 ... second diode, 7 ... output terminal, 8 ... switching transistor, 9, 10 ...
...first and second control transistors.
Claims (1)
れる一次側巻線及び中間端子を有する二次側巻線
とを設けた電源トランスと、該電源トランスの二
次側巻線の一端に接続された第１ダイオードと、
電源トランスの二次側巻線の中間端子及び出力端
子間に接続された第２ダイオードと、前記第１ダ
イオード及び出力端子間に接続されたスイツチン
グトランジスタと、前記第１ダイオードで整流さ
れた直流電圧の大きさに応じて制御され前記スイ
ツチングトランジスタをオン・オフさせる制御ト
ランジスタとよりなり、電源トランスの一次側巻
線に商業電源より第１電圧が供給されたとき制御
トランジスタにてスイツチングトランジスタをオ
ンし、電源トランスの二次側巻線の両端間電圧を
第１ダイオードで整流し得た直流電圧を前記スイ
ツチングトランジスタを介し出力端子に取出すと
ともに、該出力端子の直流電圧にて第２ダイオー
ドをオフし、電源トランスに前記第１電圧より高
圧の第２電圧が供給されたとき制御トランジスタ
にて検出しスイツチングトランジスタをオフし電
源トランスの二次側巻線の中間端子より取出され
た電圧を第２ダイオードにて整流し出力端子に取
出すようにしたことを特徴とする電源切換回路。 A power transformer equipped with a primary winding to which voltages from commercial power sources of different voltage values are applied and a secondary winding having an intermediate terminal, and connected to one end of the secondary winding of the power transformer. a first diode,
a second diode connected between the intermediate terminal of the secondary winding of the power transformer and the output terminal; a switching transistor connected between the first diode and the output terminal; and a direct current rectified by the first diode. The control transistor is controlled according to the magnitude of the voltage and turns on and off the switching transistor, and when the first voltage is supplied from the commercial power source to the primary winding of the power transformer, the switching transistor is is turned on, and the DC voltage obtained by rectifying the voltage across the secondary winding of the power transformer with the first diode is taken out to the output terminal via the switching transistor, and the DC voltage of the output terminal is output to the second diode. When the diode is turned off and a second voltage higher than the first voltage is supplied to the power transformer, the control transistor detects it, turns off the switching transistor, and the voltage is taken out from the intermediate terminal of the secondary winding of the power transformer. A power supply switching circuit characterized in that the voltage is rectified by a second diode and taken out to an output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19643386U JPS63100994U (en) | 1986-12-19 | 1986-12-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19643386U JPS63100994U (en) | 1986-12-19 | 1986-12-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63100994U true JPS63100994U (en) | 1988-06-30 |
Family
ID=31155248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19643386U Pending JPS63100994U (en) | 1986-12-19 | 1986-12-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63100994U (en) |
-
1986
- 1986-12-19 JP JP19643386U patent/JPS63100994U/ja active Pending