CN103762857A - High-power 12V electronic transformer - Google Patents
High-power 12V electronic transformer Download PDFInfo
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- CN103762857A CN103762857A CN201410022692.XA CN201410022692A CN103762857A CN 103762857 A CN103762857 A CN 103762857A CN 201410022692 A CN201410022692 A CN 201410022692A CN 103762857 A CN103762857 A CN 103762857A
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Abstract
The invention relates to a high-power 12V electronic transformer. The high-power 12V electronic transformer is characterized in that the high-power 12V electronic transformer comprises a 220V alternating current circuit, a full-bridge rectifying circuit, a starting circuit, a high-frequency oscillation circuit and a high-frequency step-down circuit and 12V alternating current output terminal; in the full-bridge rectifying circuit, the alternating current input end of a full-bridge rectifying element QZ is connected with the two ends of the 220V alternating current circuit, the positive electrode of the output end of the full-bridge rectifying element QZ is connected with a circuit positive electrode VCC, and the negative electrode of the output end of the full-bridge rectifying element QZ is connected with a circuit ground terminal GND; the starting circuit is composed of a resistor R1, a capacitor C1 and a bidirectional trigger diode KS; the high-frequency oscillation circuit is composed of an NPN-type transistor VT1, an NPN-type transistor VT2, a high-frequency oscillation coil T1, a capacitor C2 and a capacitor C3; the high-frequency step-down circuit and 12V alternating current output terminal is composed of a capacitor C4, a capacitor C5 and a high-frequency transformer T2. The high-power 12V electronic transformer overcomes many defects of a traditional silicon-steel-sheet transformer.
Description
Technical field
The invention belongs to electronic technology and DC power supply inversion transformation technique field, is about a kind of high-power 12V electronic transformer.
Background technology
The AC transformer that tradition inductance type alternating current transformer is made has simple in structure, occupation rate of market high.But, due to inductance type alternating current transformer exist volume large, heavy, waste a large amount of copper materials, power supply conversion efficiency is low and consume energy high many disadvantages, on market, by Switching Power Supply or electronic transformer, replaced gradually, electronic transformer not only energy loss is little, self-heating loss is little, and can save a large amount of copper materials.In addition, it is high that electronic transformer has frequency of oscillation, makes the easy filtering of dither composition in DC power supply, and the fluctuation of 220V alternating current is very little on DC output voltage impact, the plurality of advantages such as DC output voltage wide ranges.High-power 12V electronic transformer of the present invention has overcome that traditional silicon steel disc volume of transformer is large, weight is large, the defect that price is high.
Below describe high-power 12V electronic transformer of the present invention related relevant technologies content in implementation process in detail.
Summary of the invention
Goal of the invention and beneficial effect: the AC transformer that traditional inductance type alternating current transformer is made has simple in structure, occupation rate of market high.But, due to inductance type alternating current transformer exist volume large, heavy, waste a large amount of copper materials, power supply conversion efficiency is low and consume energy high many disadvantages, on market, by Switching Power Supply or electronic transformer, replaced gradually, electronic transformer not only energy loss is little, self-heating loss is little, and can save a large amount of copper materials.In addition, it is high that electronic transformer has frequency of oscillation, makes the easy filtering of dither composition in DC power supply, and the fluctuation of 220V alternating current is very little on DC output voltage impact, the plurality of advantages such as DC output voltage wide ranges.High-power 12V electronic transformer of the present invention has overcome that traditional silicon steel disc volume of transformer is large, weight is large, the defect that price is high.
Circuit working principle: the operation principle of high-power 12V electronic transformer is similar to Switching Power Supply, it becomes 220V AC rectification into high voltage direct current by full-bridge rectification element QZ, again high voltage direct current is transformed into the high-frequency current of tens KHz, then use high frequency transformer T2(ferrite) high frequency, high-voltage pulse are carried out to step-down, finally obtain high frequency, 12V low-voltage AC.Resistance R 1 in circuit, capacitor C 1 and bidirectional trigger diode KS form start-up circuit.Capacitor C 2, capacitor C 3, inductance coil L1, inductance coil L2, inductance coil L3, NPN transistor VT1, NPN transistor VT2 form high-frequency oscillating circuits.
Technical scheme: high-power 12V electronic transformer, it comprises 220V alternating current, full bridge rectifier, start-up circuit, high-frequency oscillating circuits, high frequency voltage descending circuit and 12V alternating current lead-out terminal, it is characterized in that:
Full bridge rectifier: the input of full-bridge rectification element QZ alternating current connects respectively the two ends of 220V alternating current, the anodal VCC of anodal connection circuit of full-bridge rectification element QZ output, the negative pole connection circuit ground GND of full-bridge rectification element QZ output;
Start-up circuit: it consists of resistance R 1, capacitor C 1 and bidirectional trigger diode KS, the anodal VCC of one termination circuit of resistance R 1 and one end of resistance R 1, one end of one termination bidirectional trigger diode KS of the other end of resistance R 1 and capacitor C 1, the other end connection circuit ground GND of capacitor C 1, another termination high-frequency oscillating circuits of bidirectional trigger diode KS;
High-frequency oscillating circuits: it is by NPN transistor VT1, NPN transistor VT2, higher-order of oscillation coil T1 and capacitor C 2, capacitor C 3 forms, the base stage of NPN transistor VT1 connects the Same Name of Ends of higher-order of oscillation coil T1 coil L1 and one end of capacitor C 2, the anodal VCC of other end connection circuit of the collector electrode of NPN transistor VT1 and capacitor C 2, the collector electrode of the emitter of NPN transistor VT1 and NPN transistor VT2 connects the different name end of higher-order of oscillation coil T1 coil L1 and one end of capacitor C 3, the base stage of NPN transistor VT2 connects the other end of capacitor C 3 and the Same Name of Ends of higher-order of oscillation coil T1 coil L2, the different name termination circuit ground GND of the emitter of NPN transistor VT2 and higher-order of oscillation coil T1 coil L2, the collector electrode of the emitter of NPN transistor VT1 and NPN transistor VT2 connects one end of higher-order of oscillation coil T1 coil L3, another termination high frequency voltage descending circuit of higher-order of oscillation coil T1 coil L3,
High frequency voltage descending circuit and 12V alternating current lead-out terminal: it is comprised of capacitor C 4, capacitor C 5 and high frequency transformer T2, the other end of a termination higher-order of oscillation coil T1 coil L3 of high frequency transformer T2 coil L4, one end of another termination capacitor C 4 of high frequency transformer T2 coil L4 and one end of capacitor C 5, the anodal VCC of other end connection circuit of capacitor C 4, the other end connection circuit ground GND of capacitor C 5, the two ends of high frequency transformer T2 coil L5 connect respectively two terminals of alternating current output.
Accompanying drawing explanation
Accompanying drawing 1 is the embodiment circuit working schematic diagram that the invention provides a kind of high-power 12V electronic transformer; Accompanying drawing 1 medium-high frequency oscillator coil T1 comprises coil L1, coil L2 and coil L3, the Same Name of Ends that the pore on coil L1, coil L2 side is coil.
Embodiment
According to high-power 12V electronic transformer circuit working schematic diagram and the accompanying drawing explanation shown in accompanying drawing 1, and according to annexation between components and parts in the each several part circuit described in summary of the invention, and the components and parts technical parameter described in execution mode requires and circuit production main points are implemented to realize the present invention, below in conjunction with embodiment, correlation technique of the present invention is further described.
Components and parts title and important technological parameters
Circuit production main points and circuit debugging
Higher-order of oscillation coil T1: select ￠ 10mm high frequency magnet ring, specification is: 10mmm * 6mm * 5mm, and enamelled wire all adopts wire diameter ￠ 0.41mm, coil L1, coil L2 and wear around 6 circles, coil L3 wears around 2 circles, will note identifying Same Name of Ends when coil L1 and coil L2 coiling;
High frequency transformer T2: take and export 12V alternating current as example, use the magnet ring of H31 * 18 * 7 cubic metre, coil L4 is with wire diameter ￠ 0.15mm enamelled wire around 340 circles, and coil L5 around 20 circles, must with epoxy resin soak envelope after winding with wire diameter ￠ 1.1mm enamelled wire;
The capacity adjustment of capacitor C 1 in accompanying drawing 1, or change the coil L1 of higher-order of oscillation coil T1, the number of turn of coil L2 simultaneously, can change the frequency of oscillation of high-frequency oscillating circuits; The number of turn of coil change L5 can change the output voltage of alternating current;
If not starting of oscillation after the circuit of high-power 12V electronic transformer connection 220V alternating current, can exchange the two ends of coil L1 to try it once;
Special suggestion: will pay special attention to safety in the making of high-power 12V electronic transformer and use procedure.
Claims (1)
1. a high-power 12V electronic transformer, it comprises 220V alternating current, full bridge rectifier, start-up circuit, high-frequency oscillating circuits, high frequency voltage descending circuit and 12V alternating current lead-out terminal, it is characterized in that:
In described full bridge rectifier, the input of full-bridge rectification element QZ alternating current connects respectively the two ends of 220V alternating current, the anodal VCC of anodal connection circuit of full-bridge rectification element QZ output, the negative pole connection circuit ground GND of full-bridge rectification element QZ output;
Described start-up circuit consists of resistance R 1, capacitor C 1 and bidirectional trigger diode KS, the anodal VCC of one termination circuit of resistance R 1 and one end of resistance R 1, one end of one termination bidirectional trigger diode KS of the other end of resistance R 1 and capacitor C 1, the other end connection circuit ground GND of capacitor C 1, another termination high-frequency oscillating circuits of bidirectional trigger diode KS;
Described high-frequency oscillating circuits is by NPN transistor VT1, NPN transistor VT2, higher-order of oscillation coil T1 and capacitor C 2, capacitor C 3 forms, the base stage of NPN transistor VT1 connects the Same Name of Ends of higher-order of oscillation coil T1 coil L1 and one end of capacitor C 2, the anodal VCC of other end connection circuit of the collector electrode of NPN transistor VT1 and capacitor C 2, the collector electrode of the emitter of NPN transistor VT1 and NPN transistor VT2 connects the different name end of higher-order of oscillation coil T1 coil L1 and one end of capacitor C 3, the base stage of NPN transistor VT2 connects the other end of capacitor C 3 and the Same Name of Ends of higher-order of oscillation coil T1 coil L2, the different name termination circuit ground GND of the emitter of NPN transistor VT2 and higher-order of oscillation coil T1 coil L2, the collector electrode of the emitter of NPN transistor VT1 and NPN transistor VT2 connects one end of higher-order of oscillation coil T1 coil L3, another termination high frequency voltage descending circuit of higher-order of oscillation coil T1 coil L3,
Described high frequency voltage descending circuit and 12V alternating current lead-out terminal are comprised of capacitor C 4, capacitor C 5 and high frequency transformer T2, the other end of a termination higher-order of oscillation coil T1 coil L3 of high frequency transformer T2 coil L4, one end of another termination capacitor C 4 of high frequency transformer T2 coil L4 and one end of capacitor C 5, the anodal VCC of other end connection circuit of capacitor C 4, the other end connection circuit ground GND of capacitor C 5, the two ends of high frequency transformer T2 coil L5 connect respectively two terminals of alternating current output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410022692.XA CN103762857A (en) | 2014-01-17 | 2014-01-17 | High-power 12V electronic transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410022692.XA CN103762857A (en) | 2014-01-17 | 2014-01-17 | High-power 12V electronic transformer |
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| Publication Number | Publication Date |
|---|---|
| CN103762857A true CN103762857A (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410022692.XA Pending CN103762857A (en) | 2014-01-17 | 2014-01-17 | High-power 12V electronic transformer |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201928193U (en) * | 2011-03-02 | 2011-08-10 | 陈子杨 | High-frequency electronic transformer |
| CN202385008U (en) * | 2011-12-08 | 2012-08-15 | 王寅寅 | Electronic transformer |
| CN202750013U (en) * | 2012-09-18 | 2013-02-20 | 刘喆 | Transformer-free 12-V direct-current power supply |
-
2014
- 2014-01-17 CN CN201410022692.XA patent/CN103762857A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201928193U (en) * | 2011-03-02 | 2011-08-10 | 陈子杨 | High-frequency electronic transformer |
| CN202385008U (en) * | 2011-12-08 | 2012-08-15 | 王寅寅 | Electronic transformer |
| CN202750013U (en) * | 2012-09-18 | 2013-02-20 | 刘喆 | Transformer-free 12-V direct-current power supply |
Non-Patent Citations (1)
| Title |
|---|
| 陈炜 等编著: "《精选家用电子制作电路300例》", 31 August 1994, 人民邮电出版社 * |
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Application publication date: 20140430 |