CN203933431U - Work in the low noise LED power supply under electronic switch and thyristor chopper - Google Patents
Work in the low noise LED power supply under electronic switch and thyristor chopper Download PDFInfo
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- CN203933431U CN203933431U CN201420171881.9U CN201420171881U CN203933431U CN 203933431 U CN203933431 U CN 203933431U CN 201420171881 U CN201420171881 U CN 201420171881U CN 203933431 U CN203933431 U CN 203933431U
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- China
- Prior art keywords
- resistance
- filter circuit
- circuit
- electronic switch
- power supply
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model discloses a kind of low noise LED power supply working under electronic switch and thyristor chopper, it comprises having two ac input ends, and the rectification circuit of two DC output ends; The first filter circuit, this first filter circuit is connected between two ac input ends of described rectification circuit; The second filter circuit, this second filter circuit is connected between two DC output ends of described rectification circuit, and has two outputs of output cathode and negative pole; BUCK-BOOST step-up/step-down circuit; And compensating resistance R1, before this compensating resistance R1 is series at one of them ac input end of described rectification circuit; Also comprise that peak value suppresses resistance R 2, this peak value suppresses resistance R 2 and connects with described the first filter circuit.Between two ac input ends of rectification circuit, add the first filter circuit and the peak value of this programme suppress resistance, and the electric current can reduce well electronic switch or controlled silicon conducting time, reduces the noise existing in circuit.
Description
Technical field
The utility model relates to a kind of lighting source circuit, specifically a kind of low noise LED power supply working under electronic switch and thyristor chopper.
Background technology
Lighting is in order to realize dimming function, and general using silicon controlled mode, changes the silicon controlled angle of flow and realize the adjustment to the output of light fixture light.
But many non-resistance devices in the equipment of existing use LED light source, are used, the problem that the linear poor and noise of the flicker bringing, light modulation is large etc.
Utility model content
Technical problem underlying to be solved in the utility model is to provide a kind of low noise LED power supply working under electronic switch and thyristor chopper, and the noise of circuit is little.
In order to solve above-mentioned technical problem, the utility model provides a kind of low noise LED power supply working under electronic switch and thyristor chopper, comprising:
Rectification circuit, described rectification circuit has two ac input ends and two DC output ends;
The first filter circuit, described the first filter circuit is connected between two ac input ends of described rectification circuit;
The second filter circuit, described the second filter circuit is connected between two DC output ends of described rectification circuit, and has two outputs of output cathode and negative pole;
BUCK-BOOST step-up/step-down circuit;
Compensating resistance R1, before described compensating resistance R1 is series at one of them ac input end of described rectification circuit;
Peak value suppresses resistance R 2, and described peak value suppresses resistance R 2 and connects with described the first filter circuit.
As preferably: described rectification circuit is bridge rectifier.
As preferably: described the first filter circuit is LC filter circuit, comprises the capacitor C 1 and the inductance L 1 that are connected in series.
As preferably: be in series with described peak value between described capacitor C I and inductance L 1 and suppress resistance R 2.
As preferably: described the second filter circuit is filter capacitor C2.
As preferably: described BUCK-BOOST step-up/step-down circuit comprises:
Transformer T, is in series with electrolysis C5 between primary coil 4 ends of described transformer T and the cathode output end of described the second filter circuit;
The collector electrode of the primary coil 2 ends difference connecting valve pipe Q1 of described transformer T and the anode of diode D2;
The secondary coil 3 end ground connection of described transformer T;
Secondary coil 1 end of described transformer T is connected to the base stage of switching tube Q1 by resistance R 5 and the capacitor C 3 of series connection;
Switching tube Q1, the base stage of described switching tube Q1 is connected to the cathode output end of described the second filter circuit by series resistance R3, R4; The grounded emitter of described switching tube Q1;
Diode D1, the negative electrode of described diode D1 is connected with described resistance R 4, the plus earth of described diode D1;
Diode D2, the negative electrode of described diode D2 is connected with the complete machine output of described filter circuit;
Resistance R 6, described resistance R 6 is in parallel with described electrolysis C5;
Load LED, described load LED and described resistance R 6, electrolysis C5 is connected in parallel.
Compared to prior art, the technical solution of the utility model possesses following beneficial effect:
1. between two ac input ends of rectification circuit, add filter circuit, the frequency of input current is reduced to 50Hz by 100Hz, thereby reduced the noise existing in whole circuit.
2. before one of them ac input end of rectification circuit, add compensating resistance, suppress the peak value of input current.
3. between two ac input ends of rectification circuit, add inhibition resistance, further suppressed the generation of current peak.
Brief description of the drawings
Fig. 1 is the circuit diagram of the utility model preferred embodiment.
Fig. 2 is the measured waveform figure of input current when controlled silicon conducting in the utility model preferred embodiment.
Embodiment
Below with embodiment, the utility model is described further by reference to the accompanying drawings.
With reference to figure 1, a kind of low noise LED power supply working under electronic switch and thyristor chopper, comprising:
Rectification circuit, described rectification circuit has two ac input ends and two DC output ends, is respectively the first ac input end 1, the second ac input end 3, the first DC output end 2, the second DC output ends 4; Rectification circuit described in the present embodiment is preferably bridge rectifier B.
Between the first ac input end 1 of described bridge rectifier B and the second ac input end 3, be connected with the first filter circuit.Described in the present embodiment, the first filter circuit is preferably LC filter circuit, comprises the capacitor C 1 and the inductance L 1 that are connected in series.
Before the first ac input end 1 of described bridge rectifier B, be also connected with compensating resistance R1.
Between the first ac input end 1 of described bridge rectifier B and the second ac input end 3, be also connected with and suppress resistance R 2, described inhibition resistance R 2 is series between described capacitor C 1 and inductance L 1.
Between the first DC output end 2 of described bridge rectifier B and the second DC output end 4, be connected with the second filter circuit, and there are two outputs of output cathode and negative pole; The second filter circuit described in the present embodiment is capacitor C 2.
BUCK-BOOST step-up/step-down circuit, comprising:
Transformer T, is in series with electrolysis C5 between primary coil 4 ends of described transformer T and the cathode output end of described the second filter circuit;
The collector electrode of the primary coil 2 ends difference connecting valve pipe Q1 of described transformer T and the anode of diode D2;
The secondary coil 3 end ground connection of described transformer T;
Secondary coil 1 end of described transformer T is connected to the base stage of switching tube Q1 by resistance R 5 and the capacitor C 3 of series connection;
Switching tube Q1, the base stage of described switching tube Q1 is connected to the cathode output end of described the second filter circuit by series resistance R3, R4; The grounded emitter of described switching tube Q1;
Diode D1, the negative electrode of described diode D1 is connected with described resistance R 4, the plus earth of described diode D1;
Diode D2, the negative electrode of described diode D2 is connected with the complete machine output of described filter circuit;
Resistance R 6, described resistance R 6 is in parallel with described electrolysis C5;
Load LED, described load LED and described resistance R 6, electrolysis C5 is connected in parallel.
With further reference to Fig. 2, by described compensating resistance R1=150 Europe, while suppressing controlled silicon conducting when resistance R 2=100 Europe, input current and thin portion launch, and conducting impulse current only has 1 peak value, so the technical solution of the utility model can effectively reduce the noise in circuit.
The above, it is only the utility model preferred embodiment, not technical scope of the present utility model is imposed any restrictions, therefore any trickle amendment that every foundation technical spirit of the present utility model is done above example, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (6)
1. work in the low noise LED power supply under electronic switch and thyristor chopper, it is characterized in that, comprising:
Rectification circuit, described rectification circuit has two ac input ends and two DC output ends;
The first filter circuit, described the first filter circuit is connected between two ac input ends of described rectification circuit;
The second filter circuit, described the second filter circuit is connected between two DC output ends of described rectification circuit, and has two outputs of output cathode and negative pole;
BUCK-BOOST step-up/step-down circuit;
Compensating resistance R1, before described compensating resistance R1 is series at one of them ac input end of described rectification circuit;
Peak value suppresses resistance R 2, and described peak value suppresses resistance R 2 and connects with described the first filter circuit.
2. the low noise LED power supply working under electronic switch and thyristor chopper according to claim 1, is characterized in that, described rectification circuit is bridge rectifier.
3. the low noise LED power supply working under electronic switch and thyristor chopper according to claim 1, is characterized in that, described the first filter circuit is LC filter circuit, comprises the capacitor C 1 and the inductance L 1 that are connected in series.
4. the low noise LED power supply working under electronic switch and thyristor chopper according to claim 3, is characterized in that, is in series with described peak value and suppresses resistance R 2 between described capacitor C I and inductance L 1.
5. the low noise LED power supply working under electronic switch and thyristor chopper according to claim 1, is characterized in that, described the second filter circuit is filter capacitor C2.
6. the low noise LED power supply working under electronic switch and thyristor chopper according to claim 1, is characterized in that, described BUCK-BOOST step-up/step-down circuit comprises:
Transformer T, is in series with electrolysis C5 between primary coil 4 ends of described transformer T and the cathode output end of described the second filter circuit;
The collector electrode of the primary coil 2 ends difference connecting valve pipe Q1 of described transformer T and the anode of diode D2;
The secondary coil 3 end ground connection of described transformer T;
Secondary coil 1 end of described transformer T is connected to the base stage of switching tube Q1 by resistance R 5 and the capacitor C 3 of series connection;
Switching tube Q1, the base stage of described switching tube Q1 is connected to the cathode output end of described the second filter circuit by series resistance R3, R4; The grounded emitter of described switching tube Q1;
Diode D1, the negative electrode of described diode D1 is connected with described resistance R 4, the plus earth of described diode D1;
Diode D2, the negative electrode of described diode D2 is connected with the complete machine output of described filter circuit;
Resistance R 6, described resistance R 6 is in parallel with described electrolysis C5;
Load LED, described load LED and described resistance R 6, electrolysis C5 is connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420171881.9U CN203933431U (en) | 2014-04-10 | 2014-04-10 | Work in the low noise LED power supply under electronic switch and thyristor chopper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420171881.9U CN203933431U (en) | 2014-04-10 | 2014-04-10 | Work in the low noise LED power supply under electronic switch and thyristor chopper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203933431U true CN203933431U (en) | 2014-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420171881.9U Expired - Fee Related CN203933431U (en) | 2014-04-10 | 2014-04-10 | Work in the low noise LED power supply under electronic switch and thyristor chopper |
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| Country | Link |
|---|---|
| CN (1) | CN203933431U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104754793A (en) * | 2013-12-25 | 2015-07-01 | 深圳市海洋王照明工程有限公司 | Voltage-reduction constant-current LED (Light Emitting Diode) driving circuit, driving device and lighting system |
-
2014
- 2014-04-10 CN CN201420171881.9U patent/CN203933431U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104754793A (en) * | 2013-12-25 | 2015-07-01 | 深圳市海洋王照明工程有限公司 | Voltage-reduction constant-current LED (Light Emitting Diode) driving circuit, driving device and lighting system |
| CN104754793B (en) * | 2013-12-25 | 2019-04-12 | 深圳市海洋王照明工程有限公司 | A kind of decompression constant current LED drive circuit, driving device and lighting system |
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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 |
Granted publication date: 20141105 Termination date: 20200410 |
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| CF01 | Termination of patent right due to non-payment of annual fee |