CN201928193U - High-frequency electronic transformer - Google Patents
High-frequency electronic transformer Download PDFInfo
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- CN201928193U CN201928193U CN2011200526095U CN201120052609U CN201928193U CN 201928193 U CN201928193 U CN 201928193U CN 2011200526095 U CN2011200526095 U CN 2011200526095U CN 201120052609 U CN201120052609 U CN 201120052609U CN 201928193 U CN201928193 U CN 201928193U
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- electronic transformer
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Abstract
The utility model belongs to the field of electronic technology application, and relates to a high-frequency electronic transformer, which comprises a commercial power supply, a full-bridge rectifying circuit, a high-frequency oscillating circuit, a startup triggering circuit, an anti-electromagnet interference absorbing circuit and a high-frequency output circuit. The high-frequency electronic transformer is characterized in that the high-frequency oscillating circuit comprises a high-frequency oscillator (T1), a silicon transistor BG1, a silicon transistor BG2 and the startup triggering circuit. The high-frequency electronic transformer provided by the utility model has the advantages similar to a switching voltage stabilizing power source, and one or more sets of different output voltages can be obtained; the circuit has overcurrent protection, so that once overload or short-circuit of the load at the output end occurs, the circuit can immediately stop oscillation to stop voltage output; the output end is well isolated from the commercial power supply; and the high-frequency electronic transformer is suitable for fabricating various direct-current power sources with power consumption not higher than 50 W. In addition, the high-frequency electronic transformer has the advantages of light weight and low fabrication cost.
Description
Technical field
The utility model belongs to the application of electronic technology field, relates to a kind of high-frequency electronic transformer.
Background technology
The operation principle and the switching power supply of high-frequency electronic transformer are closely similar, and in fact it is exactly a kind of AC inverter.At first alternating current is become Rectified alternating current, form a high-frequency generator with electronic component then direct current is become high-frequency alternating current, export needed high-frequency alternating current by electronic transformer then, then carry out secondary, rectifying and wave-filtering obtains low-voltage DC.Be characterized in that electronic transformer uses a lot of electronic components again in the circuit unlike switching power supply.It is on the basis of high-frequency electronic ballast circuit theory, a kind of new type electronic transformers of development, and it has, and volume is little, in light weight, power is big, power supply conversion efficiency is higher, the advantage of stable work in work.Having overcome traditional silicon steel sheet making transformer has big, heavy, the defectives such as the consumption copper material is many, price height of volume, so the high-frequency electronic transformer can be widely used in the various electrical equipment.
Test, analyze and compare through multiple scheme, realized intended purposes with a spot of discrete component.
Below describe this high-frequency electronic transformer in detail and make the correlation technique that relates to.
The utility model content
Goal of the invention and beneficial effect
High-frequency electronic transformer described in the utility model has the advantage of similar switching power supply, as:
The about 150～200KHz of frequency because of high-frequency electronic transformer output AC electricity, thereby the filtering of Rectified alternating current is relatively easy after the rectification, the capacity of the filter capacitor in the circuit does not need too big, and this is an aspect that alleviates electronic transformer weight, reduces cost of manufacture;
The high-frequency electronic transformer is made one or more groups different output voltage easily;
The circuit of high-frequency electronic transformer has overcurrent protection, in case overload or short circuit take place in the load of output, circuit is failure of oscillation and stop the output of high-frequency ac piezoelectric voltage at once;
Dc voltage output end and mains supply have good safe isolation effect;
Be suitable for making the various DC power supply that electric power is no more than 50W.
Technical characterictic: high-frequency electronic transformer, form by mains supply, full bridge rectifier, high-frequency oscillating circuits, start triggering circuit, anti-electromagnetic interference absorption circuit and high-frequency output circuit, it is characterized in that: comprise higher-order of oscillation transformer (T1), silicon transistor BG1, silicon transistor BG2 and start triggering circuit in the high-frequency oscillating circuits.
Components and parts annexation each other in other partial circuits
1. full bridge rectifier: (D1～D4) is connected into full bridge rectifier by 4 silicon rectifier diodes, it is characterized in that: the live wire end (L) of mains supply, zero line side (N) are connected on respectively that (D1～D4) constitutes the input of full bridge rectifier by 4 silicon rectifier diodes, the anodal connection circuit positive pole (VCC) of full bridge rectifier output, the negative pole connection circuit ground (GND) of full bridge rectifier output.
2. high-frequency oscillating circuits: the collector electrode connection circuit positive pole (VCC) of silicon transistor BG1, the base stage of silicon transistor BG1 connects the end of higher-order of oscillation Transformer Winding T1a, the other end of higher-order of oscillation Transformer Winding T1a is with connecing the emitter of silicon transistor BG1, the end of higher-order of oscillation Transformer Winding T1c and the collector electrode of silicon transistor BG2, the base stage of silicon transistor BG2 connects the end of higher-order of oscillation Transformer Winding T1b, and the emitter of silicon transistor BG2 is with the other end and circuit ground (GND) that meet higher-order of oscillation Transformer Winding T1b.
3. the feature of start triggering circuit is: the base stage of a termination silicon transistor BG2 of bidirectional trigger diode (D5), the other end of bidirectional trigger diode (D5) is with the end of connecting resistance R1 and an end of capacitor C 1, the other end connection circuit positive pole (VCC) of resistance R 1, the other end connection circuit ground (GND) of capacitor C 1.
4. anti-electromagnetic interference absorption circuit and high-frequency output circuit: the end of the elementary winding T2a of high-frequency output transformer links to each other with an end of an end of capacitor C 2, capacitor C 3, the other end connection circuit positive pole (VCC) of capacitor C 2, the other end connection circuit ground (GND) of capacitor C 3, the other end of another termination higher-order of oscillation Transformer Winding T1c of the elementary winding T2a of high-frequency output transformer, the two termination output ports of high-frequency output transformer secondary winding T2b.
Operation principle: high-frequency electronic transformer working principle and Switching Power Supply are closely similar, the about 200KHz of frequency of high-frequency electronic transformer output AC voltage, silicon rectifier diode D1～D4 constitutes bridge rectifier mains supply is become Rectified alternating current, by higher-order of oscillation transformer T1, silicon transistor BG1, BG2 form high-frequency oscillating circuits, Rectified alternating current is become high-frequency alternating current, by ferrite high-frequency output transformer T2 high-voltage pulse is carried out step-down then, obtain required 12V output voltage.Resistance R 1 in the circuit, capacitor C 1 and bidirectional trigger diode D5 constitute start triggering circuit.
Shortcoming is: the electromagnetic interference of high-frequency electronic transformer periphery is comparatively outstanding, but can the electromagnetic interference that oscillating circuit produces be absorbed by increasing absorption circuit.
Description of drawings
Accompanying drawing is the circuit working schematic diagram of high-frequency electronic transformer.
Higher-order of oscillation transformer T1 in the accompanying drawing has 3 windings, that is: elementary winding T1a, T1b and secondary winding T1c; High-frequency output transformer T2 has 2 windings, that is: elementary winding T2a and secondary winding T2b.
Line L in the accompanying drawing, N symbol are represented live wire end, the zero line side of mains supply respectively.
Embodiment
Implement according to the specification requirement of the components and parts of the circuit working schematic diagram of the transformer of high-frequency electronic shown in the accompanying drawing and description of drawings and the following stated and the annexation between the above-mentioned components and parts, can realize the utility model.
The selection of components and parts and technical parameter thereof
1.D1～D4 selects 4 1N4007 type silicon rectifier diodes for use;
2.D5 be bidirectional trigger diode, model is selected the DB3 type for use, or selects the VR60 type for use, withstand voltage requires at 29～34V;
3.BG1, BG2 is silicon transistor, model is selected 2CS13005 for use, current amplification factor β value requires 15～20.Also can select high-power high back-pressure silicon transistors such as 2SC3093 for use, require BVceo 〉=350V;
4. resistance is selected the 1/4W metalfilmresistor for use, and the resistance of resistance R 1 is that 330K Ω, power are 1W;
5. capacitor C 1～C3 selects the polypropylene/polyester electric capacity of the dacron for use, and the capacity of capacitor C 1 is 0.01 μ F/50V, and the capacity of capacitor C 2, C3 is 0.1 μ F/250V;
6. the making of higher-order of oscillation transformer (T1): on the ferrite bead of external diameter 10mm * internal diameter 6mm * high 7mm, be the high strength enamelled wire coiling of 0.27mm with diameter, the elementary winding of T1a, T1b is all around 3 circles, and the T1c secondary winding is around 1 circle;
7. the making of ferrite high-frequency output transformer (T2): the EI type ferrite magnetic core of selecting long 27mm * wide 20mm * thick 10mm for use, the high strength enamelled wire that the elementary winding diameter of T2a is 0.45mm is around 100 circles, and T2b secondary winding diameter is that the high strength enamelled wire of 1.25mm is around 8 circles.
Make main points and circuit debugging
The high-frequency electronic transformer circuit is so long as the electronic devices and components performance of selecting for use is intact, the annexation of accompanying drawing and components and parts is welded to specifications, after physical connection line and welding quality process scrutiny were errorless, circuit did not need debugging to get final product operate as normal substantially.Ifs circuit can not vibrate, or the not enough 12V of output voltage, and then further check circuit has error-free weldering, leaks weldering or rosin joint; And then whether the performance of checking silicon transistor BG1, BG2 respectively is good, and whether the phase place of higher-order of oscillation Transformer Winding T1a, T1b is correct.
After entire circuit debugging is normal, can pack in the capsule of making of metal material, help the shielding of high-frequency electronic transformer circuit like this, but will notice that circuit and shell must insulate well.Change the number of turn of the secondary winding T2b of high-frequency output transformer (T2), then can change the value of high-frequency output voltage.
The important technological parameters of high-frequency electronic transformer: input civil power alternating voltage is AC220V, and the output high-frequency ac voltage is AC12V, and power supply conversion efficiency is about 71%, the about 50W of peak power output.
Claims (5)
1. high-frequency electronic transformer, form by mains supply, full bridge rectifier, high-frequency oscillating circuits, start triggering circuit, anti-electromagnetic interference absorption circuit and high-frequency output circuit, it is characterized in that: comprise higher-order of oscillation transformer (T1), silicon transistor BG1, silicon transistor BG2 and start triggering circuit in the high-frequency oscillating circuits.
2. high-frequency electronic transformer according to claim 1, (D1～D4) is connected into full bridge rectifier to full bridge rectifier by 4 silicon rectifier diodes, it is characterized in that: the live wire end (L) of mains supply, zero line side (N) are connected on respectively that (D1～D4) constitutes the input of full bridge rectifier by 4 silicon rectifier diodes, the anodal connection circuit positive pole (VCC) of full bridge rectifier output, the negative pole connection circuit ground (GND) of full bridge rectifier output.
3. high-frequency electronic transformer according to claim 1, the feature of high-frequency oscillating circuits is: the collector electrode connection circuit positive pole (VCC) of silicon transistor BG1, the base stage of silicon transistor BG1 connects the end of higher-order of oscillation Transformer Winding T1a, the other end of higher-order of oscillation Transformer Winding T1a is with the emitter that meets silicon transistor BG1, the end of higher-order of oscillation Transformer Winding T1c and the collector electrode of silicon transistor BG2, the base stage of silicon transistor BG2 connects the end of higher-order of oscillation Transformer Winding T1b, and the emitter of silicon transistor BG2 is with the other end and circuit ground (GND) that meet higher-order of oscillation Transformer Winding T1b.
4. high-frequency electronic transformer according to claim 1, the feature of start triggering circuit is: the base stage of a termination silicon transistor BG2 of bidirectional trigger diode (D5), the other end of bidirectional trigger diode (D5) is with the end of connecting resistance R1 and an end of capacitor C 1, the other end connection circuit positive pole (VCC) of resistance R 1, the other end connection circuit ground (GND) of capacitor C 1.
5. high-frequency electronic transformer according to claim 1, the feature of anti-electromagnetic interference absorption circuit and high-frequency output circuit is: the end of the elementary winding T2a of high-frequency output transformer links to each other with an end of an end of capacitor C 2, capacitor C 3, the other end connection circuit positive pole (VCC) of capacitor C 2, the other end connection circuit ground (GND) of capacitor C 3, the other end of another termination higher-order of oscillation Transformer Winding T1c of the elementary winding T2a of high-frequency output transformer, the two termination output ports of high-frequency output transformer secondary winding T2b.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200526095U CN201928193U (en) | 2011-03-02 | 2011-03-02 | High-frequency electronic transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200526095U CN201928193U (en) | 2011-03-02 | 2011-03-02 | High-frequency electronic transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201928193U true CN201928193U (en) | 2011-08-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200526095U Expired - Fee Related CN201928193U (en) | 2011-03-02 | 2011-03-02 | High-frequency electronic transformer |
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| Country | Link |
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| CN (1) | CN201928193U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762857A (en) * | 2014-01-17 | 2014-04-30 | 吴圣铎 | High-power 12V electronic transformer |
-
2011
- 2011-03-02 CN CN2011200526095U patent/CN201928193U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762857A (en) * | 2014-01-17 | 2014-04-30 | 吴圣铎 | High-power 12V electronic transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20120302 |