CN202059625U - LED road lamp power circuit - Google Patents
LED road lamp power circuit Download PDFInfo
- Publication number
- CN202059625U CN202059625U CN2011201040718U CN201120104071U CN202059625U CN 202059625 U CN202059625 U CN 202059625U CN 2011201040718 U CN2011201040718 U CN 2011201040718U CN 201120104071 U CN201120104071 U CN 201120104071U CN 202059625 U CN202059625 U CN 202059625U
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- circuit
- power supply
- control circuit
- road lamp
- led road
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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
- Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses an LED road lamp power circuit which comprises an alternating current power supply input end (1), a power supply switch circuit (2), an output control circuit (3) and an LED lighting lamp set (4) that are sequentially connected, wherein the power supply switch circuit (2) comprises an EMI (electro magnetic interference) filter circuit (201), a power factor correction circuit (202), a transformer (203) and a rectification filter circuit (204) that are sequentially connected, the power factor correction circuit (202) is also connected with a stand-by power supply circuit (205) which is connected with a light control automatic switching lamp control circuit (209), the transformer (203) is also connected with a controller (206) which is connected with a circuit (207) with automatic regulated brightness and a photoelectric coupler control loop (208), and an output control circuit (3) is internally provided with a CC/CV control circuit (301). By adopting the LED road lamp power circuit, light attenuation of an LED lighting lamp set (4) is effectively improved.
Description
Technical field
The utility model relates to the power circuit field, relates to a kind of LED road lamp power supply circuit in particular.
Background technology
Because the LED street lamp has the advantage of high energy-conservation, long-life and environmental protection, is to belong to typical green illumination light source, the demonstration project of LED street lamp all over the world is all in carrying out like a raging fire now.
But as an emerging industry, LED street lamp industry still exists a very serious problem simultaneously: the LED street lamp is under situation about working long hours, owing to there is not corresponding adjusting device, regulate the brightness of LED street lamp, will cause LED street lamp temperature very high, the too high meeting of the temperature of LED street lamp causes optical attenuation, in the time of serious even may cause the generation of dead lamp phenomenon.
The utility model content
In order to solve the problem of above-mentioned existence, but the LED road lamp power supply circuit that the purpose of this utility model provides a kind of intelligent switch and has anti-dead lamp function.
To achieve these goals, the utility model is by the following technical solutions:
A kind of LED road lamp power supply circuit, it comprises the ac power input end (1) that is linked in sequence, power switch circuit (2), output control circuit (3) and LED lighting lamp group (4), wherein said power switch circuit (2) comprises the EMI filter circuit (201) that is linked in sequence, circuit of power factor correction (202), transformer (203) and current rectifying and wave filtering circuit (204), described circuit of power factor correction (202) also is connected with standby power circuit (205), described standby power circuit (205) is connected with automatic light control switch lamp control circuit (209), described transformer (203) also is connected with controller (206), described controller (206) is connected with automatic brightness regulation circuit (207) and photoelectrical coupler control loop (208), be provided with CC/CV control circuit (301) in the described output control circuit (3), described CC/CV control circuit (301) is connected with the output of power switch circuit (2), also is connected to output voltage regulator (SRV) and output current adjuster (SRC) on the described CC/CV control circuit (301).
Preferably, described controller (206) is the integral type integrated manipulator, wherein is integrated with pfc controller and PWM controller.
Preferably, described circuit of power factor correction (202) comprises inductance (1L2), switching tube (1Q1), rectifying tube (1D1) and filter capacitor (1E1).
Preferably, described automatic brightness regulation circuit (207) comprises thermistor (RT2), photoelectrical coupler (2U1) and photoelectrical coupler (3U2).
Preferably, described thermistor (RT2) is a negative tempperature coefficient thermistor.
Preferably, described automatic light control switch lamp control circuit (209) comprises photo resistance (GR), photoelectrical coupler (2U1) and photoelectrical coupler (3U2).
Preferably, described photo resistance (GR) is the negative temperature coefficient photo resistance.
The utility model adopts the unique circuit structural design, realized the purpose of dynamical LED road lamp power supply management, by automatic brightness regulation circuit (207) is set, because the brightness of LED lighting lamp group (4) is big more, its temperature is also just high more, the two becomes positive relationship, so can detect the current state of LED lighting lamp group (4) according to the temperature of LED lighting lamp group (4), thereby regulate its brightness automatically, make the temperature held stationary of LED lighting lamp group (4), can be too not high, keep the brightness of LED lighting lamp group (4) simultaneously again, can effectively improve the optical attenuation phenomenon of LED lighting lamp group (4).
Simultaneously the utility model is by automatic light control switch lamp control circuit (209), controls the Kai Heguan of LED street lamp according to the Strength Changes signal of light, realizes that nobody holds the intellectuality control of keeping, and realizes that darkness turns on light, and daybreak turns off the light.
Description of drawings
Fig. 1 is a principle schematic of the present utility model;
Fig. 2 is the part circuit structure diagram of power switch circuit in the utility model;
Fig. 3 is the circuit structure diagram of current rectifying and wave filtering circuit in the utility model;
Fig. 4 is that this is the circuit structure diagram of middle automatic light control switch lamp control circuit;
Fig. 5 is the circuit structure diagram of automatic brightness regulation circuit in the utility model
Fig. 6 is the circuit structure diagram of output control circuit in the utility model.
1. ac power input ends among the figure, 2. power switch circuit, 201.EMI filter circuit, 202. circuit of power factor correction, 203. transformers, 204. current rectifying and wave filtering circuits, 205. standby power circuit, 206. controller, 207. automatic brightness regulation circuits, 208. photoelectrical coupler control loops, 209. automatic light control switch lamp control circuit, 3. output control circuit, 301.CC/CV control circuit, 4.LED lighting lamp group.
Embodiment
Below in conjunction with drawings and the specific embodiments the utility model is made further detailed description explanation.
Extremely shown in Figure 6 as Fig. 1, be a kind of embodiment of the present utility model, a kind of LED road lamp power supply circuit, it comprises the ac power input end 1 that is linked in sequence, power switch circuit 2, output control circuit 3 and LED lighting lamp group 4, wherein said power switch circuit 2 comprises the EMI filter circuit 201 that is linked in sequence, circuit of power factor correction 202, transformer 203 and current rectifying and wave filtering circuit 204, wherein circuit of power factor correction 202 also is connected with standby power circuit 205, described standby power circuit 205 is connected with automatic light control switch lamp control circuit 209, the input of automatic light control switch lamp control circuit 209 is connected with standby power circuit 205, the output of automatic light control switch lamp control circuit 209 is connected with a controller 206 by photoelectrical coupler control loop 208, transformer 203 also controller 206 is connected, its middle controller 206 is connected with automatic brightness regulation circuit 207, wherein be provided with CC/CV control circuit 301 in the output control circuit 3, CC/CV control circuit 301 is connected with the output of power switch circuit 2, CC/CV control circuit 301 also is connected with output voltage regulator SRV and output current adjuster SRC, by output voltage regulator SRV can be manual the size of adjusting output voltage, by output current adjuster SRC can be manual the size of adjusting output current.
Comprise inductance 1L2, switching tube 1Q1, rectifying tube 1D1 and filter capacitor 1E1 in the circuit of power factor correction 202, the raising electric power utilance of the effect that circuit of power factor correction 202 is passable, energy-conserving and environment-protective make effective output of electric power be improved, thereby make that LED lighting lamp group 4 is more energy-conservation.
Comprise negative tempperature coefficient thermistor RT2 in the automatic brightness regulation circuit 207, photoelectrical coupler 3U2 and photoelectrical coupler 2U1, because the brightness of LED lighting lamp group 4 is big more, its temperature is also just high more, the two becomes positive relationship, so can detect the current state of LED lighting lamp group 4 according to the temperature of LED lighting lamp group 4, thereby regulate its brightness, make the temperature held stationary of LED lighting lamp group 4, can be too not high, the brightness that simultaneously keeps LED lighting lamp group 4 again, effectively improve the optical attenuation phenomenon of LED street lamp, its detailed process is: when negative tempperature coefficient thermistor RT2 detects the temperature of LED lighting lamp group 4 too high the time, the resistance of RT2 will reduce, when temperature reaches set point, the 3U2B output low level, CR1 point current potential is reduced, cause the reference voltage of 2U1A to reduce by one grade, 2U1A outputs signal to photoelectrical coupler 1U2A and feeds back to PWM controller 1U1 by 1U2B, the pwm signal of PWM controller 1U1 output diminishes, make output current diminish one grade, thereby make the brightness step-down of LED lighting lamp group 4, prolong the useful life of LED lighting lamp group 4, when temperature drops to particular value, temperature detection device RT2 can detect the signal of the temperature step-down of LED lighting lamp group 4 again, just can regulate automatically again, make the brightness of LED lighting lamp group 4 brighten.
Comprise negative temperature coefficient photo resistance GR in the automatic light control switch lamp control circuit 209, photoelectrical coupler 3U2 and photoelectrical coupler 2U1, when arriving night, negative temperature coefficient photo resistance GR detects the signal that luminosity dies down, it is big that the resistance of GR just becomes, make photoelectrical coupler 3U2D output low level, just having electric current among the photoelectrical coupler 3U3A passes through, make the 3U3B conducting, thereby 3Q1 conducting, recover the power supply of PWM controller 1U1, PWM controller 1U1 just begins to rework like this, make the LED lamp light automatically, when be about to daybreak in the past at night when, negative temperature coefficient photo resistance GR will detect the signal of luminosity grow, the resistance of GR will diminish, make photoelectrical coupler 3U2D export high level, photoelectrical coupler 3U3A will end, and no current passes through, cause 3U3B and 3Q1 to end, the power failure that causes PWM controller 1U1, PWM controller 1U1 quits work, no-voltage output, LED lighting lamp group 4 is extinguished automatically, automatic light control switch lamp control circuit 209 is controlled the Kai Heguan of LED lighting lamp group 4 according to the variation of the intensity of light, realizes that nobody holds the intellectuality control of keeping, and realizes that darkness turns on light, daybreak turns off the light, and can effectively save electric energy.
The above only is a preferred implementation of the present utility model; should be pointed out that to those skilled in the art, under the prerequisite that does not break away from the utility model creation design; can also make some similar distortion and improvement, these also should be considered as within the protection range of the present utility model.
Claims (7)
1. LED road lamp power supply circuit, it comprises the ac power input end (1) that is linked in sequence, power switch circuit (2), output control circuit (3) and LED lighting lamp group (4), it is characterized in that, described power switch circuit (2) comprises the EMI filter circuit (201) that is linked in sequence, circuit of power factor correction (202), transformer (203) and current rectifying and wave filtering circuit (204), described circuit of power factor correction (202) also is connected with standby power circuit (205), described standby power circuit (205) is connected with automatic light control switch lamp control circuit (209), described transformer (203) also is connected with controller (206), described controller (206) is connected with automatic brightness regulation circuit (207) and photoelectrical coupler control loop (208), be provided with CC/CV control circuit (301) in the described output control circuit (3), described CC/CV control circuit (301) is connected with the output of power switch circuit (2), also is connected to output voltage regulator (SRV) and output current adjuster (SRC) on the described CC/CV control circuit (301).
2. a kind of LED road lamp power supply circuit according to claim 1 is characterized in that described controller (206) is the integral type integrated manipulator, wherein is integrated with pfc controller and PWM controller.
3. a kind of LED road lamp power supply circuit according to claim 2 is characterized in that described circuit of power factor correction (202) is made up of inductance (1L2), switching tube (1Q1), rectifying tube (1D1) and filter capacitor (1E1).
4. a kind of LED road lamp power supply circuit according to claim 3 is characterized in that described automatic brightness regulation circuit (207) comprises thermistor (RT2), photoelectrical coupler (2U1) and photoelectrical coupler (3U2).
5. a kind of LED road lamp power supply circuit according to claim 4 is characterized in that described thermistor (RT2) is a negative tempperature coefficient thermistor.
6. a kind of LED road lamp power supply circuit according to claim 5 is characterized in that described automatic light control switch lamp control circuit (209) comprises photo resistance (GR), photoelectrical coupler (2U1) and photoelectrical coupler (3U2).
7. a kind of LED road lamp power supply circuit according to claim 6 is characterized in that described photo resistance (GR) is the negative temperature coefficient photo resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201040718U CN202059625U (en) | 2011-04-02 | 2011-04-02 | LED road lamp power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201040718U CN202059625U (en) | 2011-04-02 | 2011-04-02 | LED road lamp power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202059625U true CN202059625U (en) | 2011-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201040718U Expired - Fee Related CN202059625U (en) | 2011-04-02 | 2011-04-02 | LED road lamp power circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN202059625U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102438376A (en) * | 2011-12-20 | 2012-05-02 | 成都成电硅海科技股份有限公司 | LED constant current driving power supply circuit |
| CN114449699A (en) * | 2020-11-03 | 2022-05-06 | 西安钛铂锶电子科技有限公司 | Display driving chip and LED lamp panel |
-
2011
- 2011-04-02 CN CN2011201040718U patent/CN202059625U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102438376A (en) * | 2011-12-20 | 2012-05-02 | 成都成电硅海科技股份有限公司 | LED constant current driving power supply circuit |
| CN114449699A (en) * | 2020-11-03 | 2022-05-06 | 西安钛铂锶电子科技有限公司 | Display driving chip and LED lamp panel |
| CN114449699B (en) * | 2020-11-03 | 2024-06-07 | 西安钛铂锶电子科技有限公司 | Display driving chip and LED lamp panel |
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| 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: 20111130 Termination date: 20170402 |
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| CF01 | Termination of patent right due to non-payment of annual fee |