CN204616166U - LED function conversion circuit - Google Patents
LED function conversion circuit Download PDFInfo
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- CN204616166U CN204616166U CN201520292791.XU CN201520292791U CN204616166U CN 204616166 U CN204616166 U CN 204616166U CN 201520292791 U CN201520292791 U CN 201520292791U CN 204616166 U CN204616166 U CN 204616166U
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- filter circuit
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Abstract
LED function conversion circuit, relates to the drive circuit of LED illumination.There is provided one to can be used for, in conventional fluorescent lamp bracket, comprising electronic type or inductance type, also can be directly used in the LED function conversion circuit of civil power.Be provided with instrument transformer, instrument transformer is provided with at least 1 group primary coil and at least 1 group secondary coil, primary coil input is provided with adjustment electric capacity, primary coil connects primary rectifier filter circuit input, primary rectifier filter circuit exports termination primary switching circuit input, and primary switching circuit exports termination LED; Secondary coil connects secondary commutation filter circuit input, and secondary commutation filter circuit exports termination magnetic silicon controlled switch circuit, and magnetic silicon controlled switch circuit is connected with LED.
Description
Technical field
The utility model relates to the drive circuit of LED illumination, especially relates to the LED function conversion circuit of the High-frequency and low-frequency of the compatible fluorescent tube of a kind of Universal LED.
Background technology
The transition stage that new light sources LED illumination replaces conventional light source (fluorescent lamp etc.) at present, at this old and new's light source and the period of depositing, conventional lamp exists in a large number, a kind of universal LED lamp tube of the market demand, it may be used for, in the light fixture of civil power and fluorescent lamp ballast, comprising electronic type and inductance type.Require to exchange performance good, application is simple, safety.
In fact the ballast in conventional lamp is varied, and performance difference is comparatively large, and in Universal LED lamp, constant current switch circuit is not suitable with this changeable difference.Easy method is that LED lamp tube is in pipe pressure, pipe stream and pulse voltage (the refiring voltage of similar fluorescent lamp), the discharge characteristic of simulation fluorescent tube, the current-limiting function of this method is the ballast from electric ballast, it cannot work in power frequency civil power, the application of high frequency and power frequency is difficult to compatibility, under the restriction of cost, cheap scheme arranges high frequency to sample comprehensive instrument transformer and reverse-blocking tetrode thyristor etc., automatically selects conversion to the different operating mode of high frequency (electric ballast) and power frequency (civil power).
Summary of the invention
The purpose of this utility model is to provide one and can be used for, in conventional fluorescent lamp bracket, comprising electronic type or inductance type, also can be directly used in the LED function conversion circuit of civil power.
The utility model is provided with instrument transformer, instrument transformer is provided with at least 1 group primary coil and at least 1 group secondary coil, primary coil input is provided with adjustment electric capacity, primary coil connects primary rectifier filter circuit input, primary rectifier filter circuit exports termination primary switching circuit input, and primary switching circuit exports termination LED; Secondary coil connects secondary commutation filter circuit input, and secondary commutation filter circuit exports termination magnetic silicon controlled switch circuit, and magnetic silicon controlled switch circuit is connected with LED.
Described instrument transformer can be provided with 1 group of primary coil and 1 group of secondary coil, and the inductance value of primary coil is 30 ~ 100 μ H, and secondary inductance amount is 5 ~ 20 μ H.
Described instrument transformer can be provided with 2 groups of primary coils and 2 groups of secondary coils, and the inductance value of 2 groups of primary coils is respectively 30 ~ 100 μ H and 100 ~ 300 μ H, and 2 groups of secondary inductance amounts are 5 ~ 20 μ H.
Described primary rectifier filter circuit can adopt full-bridge rectification filter circuit or Half bridge rectifier filter circuit.
Described secondary commutation filter circuit can adopt full-bridge rectification filter circuit or Half bridge rectifier filter circuit.
The output of described secondary commutation filter circuit can be connected in series current-limiting resistance.
Described primary switching circuit can adopt IC switching circuit.
False-touch prevention can be provided with between the SCR control pole of described magnetic silicon controlled switch circuit and negative electrode and send out electrochemical capacitor and bleeder resistance.
Described magnetic silicon controlled switch circuit can be provided with at least 1 group.
Compared with existing LED function conversion circuit, the utility model has following outstanding advantages:
1, the utility model adopts the comprehensive instrument transformer of Multiple coil and adjustment electric capacity, to simulate the discharge characteristic of conventional fluorescent.For adapting to different operating mode, being provided with transformer secondaries, secondary commutation filter circuit and reverse-blocking tetrode thyristor etc., the working method of LED lamp circuit is selected and changed.
2, for adapting to LED lamp bead marshalling, two groups of reverse-blocking tetrode thyristors can be set, series connection be carried out to many LED lamp bead and changes with marshalling in parallel.Meanwhile, for improving the reliability of work, antisurge piezo-resistance and overvoltage protection can be provided with.
3, adjust Capacitance parallel connection in the input of circuit, there is multiple effect: can change electric ballast output current in supporting light fixture and floating voltage, can peak limiting voltage, the power that electric ballast power booster is excessive, can adjust lamp within the specific limits can be prevented under abnormality.
4, the primary coil of instrument transformer is connected in the ac circuit of circuit respectively, and effect is the generation source of back-emf, meets the acceleration energy of triode switch conversion in half-bridge inversion circuit, guarantees the low consumption of triode.
5, the secondary coil of instrument transformer is high frequency sample coil, and high frequency signal current is after the half-wave of rectifier diode or full-wave rectification and capacitor filtering, and trigger reverse-blocking tetrode thyristor, this signal code is the instruction of power and energy.
6, magnetic silicon controlled switch circuit can be single group or many groups, it by controllable silicon VS1, current-limiting resistance R3, false-touch prevention sends out electrochemical capacitor C5 and bleeder resistance R4 forms.Single group is function switch, and silicon controlled anode and cathode and IC switching circuit power end homopolarity mutually also, allow LED group direct power, and prevention IC works.
7, many groups circuit of magnetic silicon controlled switch circuit, be carry out LED lamp bead and marshalling of connecting, their trigger source is from the secondary coil of instrument transformer, and two groups of controllable silicons connect with two groups of series LED groups, can make two groups of series connection into two groups of parallel connections, the electric current of LED group and voltage can be multiplied and reduce.
8, conventional overvoltage protection, abnormal protection, delay circuit etc. is also provided with.
Accompanying drawing explanation
Fig. 1 is the circuit theory composition schematic diagram of the utility model embodiment.
Fig. 2 is the schematic diagram that LED group adopts reverse-blocking tetrode thyristor marshalling.
Embodiment
See Fig. 1, the utility model embodiment is provided with instrument transformer L1, instrument transformer L1 is provided with 2 groups of primary coils N1, N2 and 2 groups of secondary coils N3, N4, primary coil input is provided with adjustment electric capacity C1, primary coil connects primary rectifier filter circuit input (adopting full bridge rectifier VD1 ~ 4), primary rectifier filter circuit exports termination primary switching circuit K input, and primary switching circuit K exports termination LED; Secondary coil connects secondary commutation filter circuit input, and secondary commutation filter circuit exports termination magnetic silicon controlled switch circuit, and magnetic silicon controlled switch circuit is connected with LED.
The inductance value of 2 groups of primary coils is respectively 30 ~ 100 μ H and 100 ~ 300 μ H, and 2 groups of secondary inductance amounts are 5 ~ 20 μ H.
Described primary rectifier filter circuit adopts full-bridge rectification filter circuit VD1 ~ 4.Described secondary commutation filter circuit adopts Half bridge rectifier filter circuit VD5, VD6.The output of described secondary commutation filter circuit can be connected in series current-limiting resistance R3.
Be provided with false-touch prevention between the control pole of the controllable silicon VS1 of described magnetic silicon controlled switch circuit and negative electrode and send out electrochemical capacitor C5 and bleeder resistance R4.
A key element----instrument transformer in LED function conversion circuit, be processed by coilings such as compact ferrites magnetic core, skeleton, enamelled wires, core center leaves 0.4 ~ 0.6mm air gap, can without insulating tape interlayer between coil and coil.
At the input of circuit, abnormal protection device R VK can be set, piezo-resistance RV and adjustment electric capacity C1 is connected in parallel on the input two ends after insurance resistance FS, distinguish primary coil N1 and N2 in serial mutual inductor L1 successively, be connected to electric capacity C1 two ends, the another two ends lead-in wire of N1 and N2 connects with the end that exchanges of the full-bridge rectification of fast recovery diode VD1 ~ 4 respectively, the DC terminal parallel leak resistance R2 that rectification exports and electrolytic capacitor filter C2, direct-current power supply IC switching circuit is to LED lamp bead group, IC switching circuit is generally constant current non-isolated circuit, also common current-limiting circuit can be used, the power end of switching circuit is connected with LED lamp bead group.
The power and energy of circuit is performed by reverse-blocking tetrode thyristor VS, and command source is in the secondary coil N3 etc. of instrument transformer.Secondary coil N3 lead-in wire is connected with rectifier diode VD5, VD6, can halfwave rectifier also can full-wave rectification, and connect electrochemical capacitor C4 filtering, positive current imports the control pole of controllable silicon VS1 through current-limiting resistance R3, be parallel with false-touch prevention between controllable silicon negative electrode and control pole and send out electrochemical capacitor C5 and bleeder resistance R4, controllable silicon anode is connected with LED group negative pole, and silicon controlled negative electrode is connected with negative electricity end.
Can at controllable silicon VS1 anode tap string anti-return diode VD7.Can in LED lamp bead group two ends shunt regulator diode or piezo-resistance.Abnormal protection device R VK can be set at ac input end.
LED lamp bead combination as shown in Figure 2, in fig. 2, magnetic silicon controlled switch circuit can be provided with at least 2 groups, LED lamp bead series connection group by 2 string equal numbers: A group and B group, connect by diode VD8 is positive and negative, connect two groups of LED lamp bead, form one group of series connection, the negative electrode of controllable silicon VS2 connects the positive pole of A group LED, and the anode of controllable silicon VS2 connects the positive pole of B group LED.Controllable silicon VS3 anode connects the negative pole of B group LED, and controllable silicon VS3 negative electrode connects the negative pole of A group LED, when controllable silicon close conducting, LED group is parallel way; When controllable silicon disconnection, LED group are series system.
Claims (9)
1.LED lamp function conversion circuit, it is characterized in that being provided with instrument transformer, instrument transformer is provided with at least 1 group primary coil and at least 1 group secondary coil, primary coil input is provided with adjustment electric capacity, primary coil connects primary rectifier filter circuit input, primary rectifier filter circuit exports termination primary switching circuit input, and primary switching circuit exports termination LED; Secondary coil connects secondary commutation filter circuit input, and secondary commutation filter circuit exports termination magnetic silicon controlled switch circuit, and magnetic silicon controlled switch circuit is connected with LED.
2. LED function conversion circuit as claimed in claim 1, it is characterized in that described instrument transformer is provided with 1 group of primary coil and 1 group of secondary coil, the inductance value of primary coil is 30 ~ 100 μ H, and secondary inductance amount is 5 ~ 20 μ H.
3. LED function conversion circuit as claimed in claim 1, it is characterized in that described instrument transformer is provided with 2 groups of primary coils and 2 groups of secondary coils, the inductance value of 2 groups of primary coils is respectively 30 ~ 100 μ H and 100 ~ 300 μ H, and 2 groups of secondary inductance amounts are 5 ~ 20 μ H.
4. LED function conversion circuit as claimed in claim 1, is characterized in that described primary rectifier filter circuit adopts full-bridge rectification filter circuit or Half bridge rectifier filter circuit.
5. LED function conversion circuit as claimed in claim 1, is characterized in that described secondary commutation filter circuit adopts full-bridge rectification filter circuit or Half bridge rectifier filter circuit.
6. LED function conversion circuit as claimed in claim 1, is characterized in that the output serial connection current-limiting resistance of described secondary commutation filter circuit.
7. LED function conversion circuit as claimed in claim 1, is characterized in that described primary switching circuit adopts IC switching circuit.
8. LED function conversion circuit as claimed in claim 1, is characterized in that being provided with false-touch prevention between the SCR control pole of described magnetic silicon controlled switch circuit and negative electrode sends out electrochemical capacitor and bleeder resistance.
9. LED function conversion circuit as claimed in claim 1, is characterized in that described magnetic silicon controlled switch circuit is provided with at least 1 group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520292791.XU CN204616166U (en) | 2015-05-08 | 2015-05-08 | LED function conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520292791.XU CN204616166U (en) | 2015-05-08 | 2015-05-08 | LED function conversion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204616166U true CN204616166U (en) | 2015-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520292791.XU Expired - Fee Related CN204616166U (en) | 2015-05-08 | 2015-05-08 | LED function conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204616166U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109068442A (en) * | 2018-08-06 | 2018-12-21 | 深圳拓邦股份有限公司 | A kind of LED drive circuit and LED lamp of compatible electronic ballast and alternating current |
| CN110557868A (en) * | 2019-09-19 | 2019-12-10 | 横店集团得邦照明股份有限公司 | lamp tube compatible with high frequency and power frequency and implementation method thereof |
| WO2020029006A1 (en) * | 2018-08-06 | 2020-02-13 | 深圳拓邦股份有限公司 | Led driving circuit compatible with electronic ballast and commercial power, and led lamp |
-
2015
- 2015-05-08 CN CN201520292791.XU patent/CN204616166U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109068442A (en) * | 2018-08-06 | 2018-12-21 | 深圳拓邦股份有限公司 | A kind of LED drive circuit and LED lamp of compatible electronic ballast and alternating current |
| WO2020029006A1 (en) * | 2018-08-06 | 2020-02-13 | 深圳拓邦股份有限公司 | Led driving circuit compatible with electronic ballast and commercial power, and led lamp |
| CN109068442B (en) * | 2018-08-06 | 2024-03-29 | 深圳拓邦股份有限公司 | LED drive circuit compatible with electronic ballast and mains supply and LED lamp |
| CN110557868A (en) * | 2019-09-19 | 2019-12-10 | 横店集团得邦照明股份有限公司 | lamp tube compatible with high frequency and power frequency and implementation method thereof |
| CN110557868B (en) * | 2019-09-19 | 2024-04-05 | 横店集团得邦照明股份有限公司 | Lamp tube compatible with high frequency and power frequency and implementation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20180508 |