CN203761633U - Energy-saving LED traffic light with long service life - Google Patents
Energy-saving LED traffic light with long service life Download PDFInfo
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- CN203761633U CN203761633U CN201320881372.0U CN201320881372U CN203761633U CN 203761633 U CN203761633 U CN 203761633U CN 201320881372 U CN201320881372 U CN 201320881372U CN 203761633 U CN203761633 U CN 203761633U
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims description 23
- 238000004020 luminiscence type Methods 0.000 claims description 14
- 239000003381 stabilizer Substances 0.000 claims description 12
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000005070 sampling Methods 0.000 abstract 3
- 239000003990 capacitor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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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
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Abstract
The utility model discloses an energy-saving LED traffic light with a long service life, and the traffic light comprises an LED light-emitting unit and a power driving unit which is used for driving the LED light-emitting unit. The power driving unit comprises an EMC circuit, a first rectification filter circuit, a power conversion circuit, a second rectification filter circuit, and an output circuit, wherein the EMC circuit, the first rectification filter circuit, the power conversion circuit, the second rectification filter circuit and the output circuit are sequentially in electrical connection. The power driving module also comprises a PWM-PFC combined controller, a sampling circuit, and a starting circuit. The sampling circuit is used for sensing the voltage and current of the output circuit, and generating a corresponding voltage feedback signal and a corresponding current feedback signal. The PWM-PFC combined controller is used for controlling the power conversion circuit according to the voltage and current feedback signals provided by the sampling circuit. The starting circuit is electrically connected between the first rectification filter circuit and the PWM-PFC combined controller. The traffic light provided by the utility model can effectively improve the power factor, can reduce the energy consumption, is high in reliability, and is long in service life.
Description
Technical field
The utility model relates to a kind of traffic lights, is specifically related to a kind of durable energy saving LED traffic lights.
Background technology
Traffic lights are the important component parts in traffic signals, it is the basic language of road traffic, it generally comprises LED luminescence unit and driving power unit, and driving power unit is for being converted to specific electric current and voltage with driving LED luminescence unit AC power supply.The driving power cell power factor of existing traffic lights is very low, energy consumption is very large, and the reliability of existing LED luminescence unit is poor, affects the useful life of traffic lights.
Utility model content
For the deficiencies in the prior art, the utility model proposes a kind of durable energy saving LED traffic lights, it can effectively improve the power factor of traffic lights and reduce energy consumption.
In order to achieve the above object, the technical scheme that the utility model adopts is as follows:
Durable energy saving LED traffic lights, comprise LED luminescence unit and for driving the driving power unit of this LED luminescence unit work, described driving power unit comprises EMC circuit, the first current rectifying and wave filtering circuit, power conversion circuit, the second current rectifying and wave filtering circuit and the output circuit being electrically connected successively; Described driving power module also comprises PWM-PFC combined controller, sample circuit and start-up circuit; This sample circuit is used for the voltage and current of sensing output circuit and generates corresponding voltage feedback signal and current feedback signal; This PWM-PFC combined controller is controlled power conversion circuit for the voltage feedback signal and the current feedback signal that provide according to sample circuit; This start-up circuit is electrically connected between the first current rectifying and wave filtering circuit and PWM-PFC combined controller.
Preferably, described driving power unit also comprises undervoltage turnoff circuit, and it is electrically connected between the first current rectifying and wave filtering circuit and PWM-PFC combined controller.
Preferably, described driving power unit also comprises auxiliary power circuit, and it is electrically connected between power conversion circuit and sample circuit, is used to sample circuit that stable power supply is provided.
Preferably, the input of described EMC unit is also provided with lightning protection circuit.
Preferably, described LED luminescence unit consists of a plurality of LED series-parallel connections, and it comprises that luminous group of luminous group of LED that a plurality of connection in series-parallel connect and each LED is in series by a LED and a current-limiting resistance.
Compared with prior art, the utility model will exchange input and through EMC, process successively, rectifying and wave-filtering, power factor correction and power conversion, after rectifying and wave-filtering, for providing galvanic current, LED luminescence unit presses supply again, the utility model can carry out power factor correction to traffic lights by PWM-PFC combined controller, to improve power factor, by start-up circuit, reduce the startup loss of traffic lights, to improve power supply conversion efficiency, and, LED luminescence unit of the present utility model adopts a plurality of LED series-parallel connections to form, during bad the and short circuit of LED quality on luminous group of a certain LED, do not affect the normal work of remaining all LED, its circuit is simple, brightness stability and reliability are high, can effectively improve the useful life of traffic lights.
Accompanying drawing explanation
Fig. 1 is the block diagram of the preferred embodiment of the utility model durable energy saving LED traffic lights;
Fig. 2 is the circuit diagram of driving power unit in Fig. 1.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the utility model is described further, so that clearer, understand the utility model technological thought required for protection.
Refer to Fig. 1 and Fig. 2, the utility model relates to a kind of durable energy saving LED traffic lights, and its better embodiment comprises driving power unit 100 and LED luminescence unit 200.
Driving power unit 100 is for AC power supply is converted to specific electric current and voltage with driving LED luminescence unit 120, and it comprises lightning protection circuit 110, EMC circuit 120, the first current rectifying and wave filtering circuit 131, power conversion circuit 140, the second current rectifying and wave filtering circuit 132, output circuit 150, sample circuit 160, PWM-PFC combined controller 170, start-up circuit 180 and undervoltage turnoff circuit 190; Wherein, lightning protection circuit 110, EMC circuit 120, the first current rectifying and wave filtering circuit 131, power conversion circuit 140, the second current rectifying and wave filtering circuit 132 and output circuit 150 are electrically connected successively; Sample circuit 160 is electrically connected between output circuit 150 and PWM-PFC combined controller 170.
Wherein, EMC circuit 120 can effectively improve the Electro Magnetic Compatibility of driving power unit, reduces the interference of outer net to product, and reduces the interference of product to outer net.
Power conversion circuit 140 comprises that one for regulating the switching tube Q3 of this power conversion circuit output voltage, this switching tube Q3 is according to PWM-PFC combined controller 170 control cycle ground turn-on and turn-off, to realize the adjusting to power conversion circuit output voltage, the drain electrode of this switching tube Q3 is arranged with magnet ring, and be provided with capacitor C 2 between the drain electrode of this switching tube Q3 and source electrode, can effectively eliminate High-frequency Interference, improve EMI and the THD performance of driving power unit.
Output circuit 150 is provided with dummy load, to improve the stability of driving power unit.
The second current rectifying and wave filtering circuit 132 comprises a Schottky diode D3 for rectification, and the positive pin of this Schottky diode D3 and negative pin are all established and be arranged with magnet ring, can effectively eliminate High-frequency Interference, improves EMI and the THD performance of driving power unit.
Sample circuit 160 is for the voltage and current of sensing output circuit and generate corresponding voltage feedback signal and current feedback signal, and above-mentioned voltage feedback signal and current feedback signal are sent to PWM-PFC combined controller 170.This PWM-PFC combined controller 170 is controlled power conversion circuit for the voltage feedback signal and the current feedback signal that provide according to sample circuit 160, it is comprised of pwm control circuit and active PFC, the utility model can carry out power factor correction to traffic lights by PWM-PFC combined controller, to improve power factor.Wherein, active PFC preferably adopts single-stage PFC.
Start-up circuit 180 is electrically connected between the first current rectifying and wave filtering circuit 131 and PWM-PFC combined controller 170, and it comprises that triode Q1, triode Q2, diode D1, voltage-stabiliser tube DZ1, voltage-stabiliser tube DZ2, capacitor C 1 and resistance R 1 are to resistance R 4.The collector electrode of this triode Q1 connects the first current rectifying and wave filtering circuit 131 by resistance R 1, the emitter of this triode Q1 connects the anode of this diode D1, the negative electrode of this diode D1 connects this PWM-PFC combined controller 170, the base stage of this triode Q1 is connected the first current rectifying and wave filtering circuit 131 by resistance R 3 successively with resistance R 2, the base stage of this triode Q1 also connects the negative electrode of voltage-stabiliser tube DZ1, the plus earth of this voltage-stabiliser tube DZ1; The collector electrode of this triode Q2 connects the base stage of this triode Q1, the grounded emitter of this triode Q2, and the base stage of this triode Q2 connects the anode of this voltage-stabiliser tube DZ2, and the negative electrode of this voltage-stabiliser tube DZ2 is successively by resistance R 4 and capacitor C 1 ground connection; The anodic bonding of this diode D2 is between resistance R 4 and capacitor C 1, and the negative electrode of this diode D2 connects the negative electrode of diode D1.
When driving power unit 100 starts, the base stage of triode Q1 obtains the electric emitter positively biased conducting that makes this triode Q1, the direct current of now exporting after the first current rectifying and wave filtering circuit 131 rectifications transfers to this PWM-PFC combined controller 170 through resistance R 1, triode Q1 and diode D1, and be 170 power supplies of PWM-PFC combined controller, after driving power unit 100 starts, the instead not conducting partially of emitter of this triode Q1, start-up circuit 180 is in closed condition.The utility model can reduce the startup loss of traffic lights by start-up circuit, to improve power supply conversion efficiency.
Undervoltage turnoff circuit 190 is electrically connected between the first current rectifying and wave filtering circuit 131 and PWM-PFC combined controller 170.
As preferably, driving power unit 100 also comprises auxiliary power circuit 161, and it is electrically connected between power conversion circuit 140 and sample circuit 160, is used to sample circuit 160 that stable power supply is provided.
LED luminescence unit 120 is connected to the output of driving power unit 100, and it consists of a plurality of LED series-parallel connections, comprises that luminous group of luminous group of LED that a plurality of connection in series-parallel connect and each LED is in series by a LED and a current-limiting resistance.During bad the and short circuit of LED quality on luminous group of a certain LED, do not affect the normal work of remaining all LED, its circuit is simple, brightness stability and reliability high, the useful life that can effectively improve traffic lights.
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and distortion all should belong to the protection range of the utility model claim within.
Claims (8)
1. durable energy saving LED traffic lights, comprise LED luminescence unit and for driving the driving power unit of this LED luminescence unit work, it is characterized in that: described driving power unit comprises EMC circuit, the first current rectifying and wave filtering circuit, power conversion circuit, the second current rectifying and wave filtering circuit and the output circuit being electrically connected successively; Described driving power module also comprises PWM-PFC combined controller, sample circuit and start-up circuit; This sample circuit is used for the voltage and current of sensing output circuit and generates corresponding voltage feedback signal and current feedback signal; This PWM-PFC combined controller is controlled power conversion circuit for the voltage feedback signal and the current feedback signal that provide according to sample circuit; This start-up circuit is electrically connected between the first current rectifying and wave filtering circuit and PWM-PFC combined controller.
2. durable energy saving LED traffic lights as claimed in claim 1, is characterized in that: described driving power unit also comprises undervoltage turnoff circuit, and it is electrically connected between the first current rectifying and wave filtering circuit and PWM-PFC combined controller.
3. durable energy saving LED traffic lights as claimed in claim 1, is characterized in that: described the second current rectifying and wave filtering circuit comprises a Schottky diode for rectification, and the positive pin of this Schottky diode and negative pin are all established and be arranged with magnet ring.
4. durable energy saving LED traffic lights as claimed in claim 1, it is characterized in that: described power conversion circuit comprises a switching tube, this switching tube is used for according to the control cycle ground turn-on and turn-off of PWM-PFC combined controller to realize the adjusting to power conversion circuit output voltage, the drain electrode of this switching tube is arranged with magnet ring, and is provided with the second electric capacity between the drain electrode of this switching tube and source electrode.
5. durable energy saving LED traffic lights as claimed in claim 1, is characterized in that: described start-up circuit comprises the first triode, the second triode, the first diode, the second diode, the first voltage-stabiliser tube, the second voltage-stabiliser tube, the first electric capacity and the first resistance to the four resistance; The collector electrode of this first triode connects the first current rectifying and wave filtering circuit by the first resistance, the emitter of this first triode connects the anode of this first diode, the negative electrode of this first diode connects this PWM-PFC combined controller, the base stage of this first triode is connected the first current rectifying and wave filtering circuit by the 3rd resistance with the second resistance successively, the base stage of this first triode also connects the negative electrode of the first voltage-stabiliser tube, the plus earth of this first voltage-stabiliser tube; The collector electrode of this second triode connects the base stage of the first triode Q1, the grounded emitter of this second triode, and the base stage of this second triode connects the anode of this second voltage-stabiliser tube, and the negative electrode of this second voltage-stabiliser tube is successively by the 4th resistance and the first capacity earth; The anodic bonding of this second diode is between the 4th resistance and the first electric capacity, and the negative electrode of this second diode connects the negative electrode of this first diode.
6. durable energy saving LED traffic lights as claimed in claim 1, is characterized in that: described driving power unit also comprises auxiliary power circuit, and it is electrically connected between power conversion circuit and sample circuit, are used to sample circuit that stable power supply is provided.
7. durable energy saving LED traffic lights as claimed in claim 1, is characterized in that: the input of described EMC unit is also provided with lightning protection circuit.
8. durable energy saving LED traffic lights as claimed in claim 1, it is characterized in that: described LED luminescence unit consists of a plurality of LED series-parallel connections, it comprises that luminous group of luminous group of LED that a plurality of connection in series-parallel connect and each LED is in series by a LED and a current-limiting resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320881372.0U CN203761633U (en) | 2013-12-28 | 2013-12-28 | Energy-saving LED traffic light with long service life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320881372.0U CN203761633U (en) | 2013-12-28 | 2013-12-28 | Energy-saving LED traffic light with long service life |
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| Publication Number | Publication Date |
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| CN203761633U true CN203761633U (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320881372.0U Expired - Lifetime CN203761633U (en) | 2013-12-28 | 2013-12-28 | Energy-saving LED traffic light with long service life |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105848353A (en) * | 2016-05-13 | 2016-08-10 | 东莞市领冠半导体照明有限公司 | Constant-voltage light modulation power supply circuit |
| CN108966416A (en) * | 2018-07-11 | 2018-12-07 | 昆山仕优威电子科技有限公司 | A kind of control system of UV LED light source |
| CN109121268A (en) * | 2018-08-21 | 2019-01-01 | 江苏优为视界科技有限公司 | A kind of high efficiency intelligent fluorescent lamp control system |
| CN109922561A (en) * | 2017-12-13 | 2019-06-21 | 意法半导体国际有限公司 | It is able to carry out the LED driving circuits of simulation light modulation and digital dimming |
| CN111083838A (en) * | 2019-12-16 | 2020-04-28 | 深圳市崧盛电子股份有限公司 | Boost following control circuit and LED driving power supply |
-
2013
- 2013-12-28 CN CN201320881372.0U patent/CN203761633U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105848353A (en) * | 2016-05-13 | 2016-08-10 | 东莞市领冠半导体照明有限公司 | Constant-voltage light modulation power supply circuit |
| CN105848353B (en) * | 2016-05-13 | 2017-10-27 | 东莞市领冠半导体照明有限公司 | A kind of constant pressure dimming power source circuit |
| CN109922561A (en) * | 2017-12-13 | 2019-06-21 | 意法半导体国际有限公司 | It is able to carry out the LED driving circuits of simulation light modulation and digital dimming |
| CN109922561B (en) * | 2017-12-13 | 2021-07-16 | 意法半导体国际有限公司 | LED control and drive circuit capable of analog dimming and digital dimming |
| US11296591B2 (en) | 2017-12-13 | 2022-04-05 | Stmicroelectronics International N.V. | LED control and driving circuit capable of both analog and digital dimming |
| CN108966416A (en) * | 2018-07-11 | 2018-12-07 | 昆山仕优威电子科技有限公司 | A kind of control system of UV LED light source |
| CN108966416B (en) * | 2018-07-11 | 2021-01-08 | 昆山仕优威电子科技有限公司 | Control system of ultraviolet light-emitting diode light source |
| CN109121268A (en) * | 2018-08-21 | 2019-01-01 | 江苏优为视界科技有限公司 | A kind of high efficiency intelligent fluorescent lamp control system |
| CN111083838A (en) * | 2019-12-16 | 2020-04-28 | 深圳市崧盛电子股份有限公司 | Boost following control circuit and LED driving power supply |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140806 |
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| CX01 | Expiry of patent term |