CN201688251U - High-efficiency low-harmonic LED lighting automatic dimming power supply - Google Patents
High-efficiency low-harmonic LED lighting automatic dimming power supply Download PDFInfo
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- CN201688251U CN201688251U CN2010201384063U CN201020138406U CN201688251U CN 201688251 U CN201688251 U CN 201688251U CN 2010201384063 U CN2010201384063 U CN 2010201384063U CN 201020138406 U CN201020138406 U CN 201020138406U CN 201688251 U CN201688251 U CN 201688251U
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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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- 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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Abstract
The utility model discloses a high-efficiency low-harmonic LED lighting automatic dimming power supply belonging to the technical field of power supply and electronics and comprising an EMI filtering circuit, a rectifying and filtering circuit, a PFC circuit, an LLC circuit, a high-frequency transformer and a high-frequency rectifying and filtering circuit which are connected in sequence; the rectifying and filtering circuit is also connected with an auxiliary power supply circuit which respectively supplies power to the PFC circuit and the LLC circuit; the output end of the high-frequency rectifying and filtering circuit is connected with the input end of a constant voltage control circuit and then is connected with the LLC circuit; and the high-frequency rectifying and filtering circuit supplies power to an LED lamp group by a constant-current driving circuit. The high-efficiency low-harmonic LED lighting automatic dimming power supply is simple in structure, obviously prolongs the service life of the LED, has good road lighting effect, greatly improves the road safety, and can dim automatically according to differences of time period, weather and the ambient brightness, thus achieving the purposes of saving energy, and leading the energy-saving effect of LED lighting to be more obvious and have more competitiveness. The high-efficiency low-harmonic LED lighting automatic dimming power supply is applicable to switching power supplies of LED street lamps.
Description
Affiliated technical field
The utility model relates to a kind of Switching Power Supply, and especially LED electric consumption on lighting source belongs to power supply and electronic technology field.
Background technology
At present, the protection environment, saves energy, more and more higher requirement is the aim of green illumination to lighting quality to satisfy people.Change people's energy obtain manner and improve the common recognition that energy utilization rate has become current common people.Contain heavy metal substance in the conventional road lamp light source, contaminated environment; Light source energy consumption height; Colour rendering index is low, can only reach about 20; The uniformity is low, though vertical illumination can reach road illumination standards, edge illumination is well below vertical illumination, and the uniformity is poor, can not reach road illumination standards; Conventional road lamp can only reach the level of " bright ", the level of illumination " matter " that is far from being.Because the light source of conventional road lamp is globe-type luminescence, direction of light is uncontrollable, forms circular iris (hot spot) on the road surface, produces local shade, and illuminating effect is not good, and pedestrian and vehicle drive personnel are impacted in visual aspects, and traffic accident takes place easily.
And the LED street lamp can overcome the shortcoming of conventional road lamp, and led light source does not contain heavy metal substance, does not pollute the environment; The LED street lamp is low in energy consumption, and the energy consumption of conventional road lamp light source is 5-10 a times of LED; The LED colour rendering index can reach more than 80, more near the illuminating effect of natural daylight; And the good evenness of LED street lamp, also,, on illuminating road, form a complete light belt by the secondary light-distribution design because the LED light emission direction has controllability (lighting angle lockable), do not have shade, can not impact in visual aspects pedestrian and vehicle drive personnel.But supporting with it LED electric consumption on lighting source is unsatisfactory, makes the life-span of LED lamp not high enough, influences applying of LED street lamp.
The utility model content
In order to overcome the above-mentioned deficiency of existing LED mains lighting supply, the utility model provides a kind of LED electric consumption on lighting source that can be with an automatic light meter.
The technical scheme that its technical problem that solves the utility model adopts is: the high-efficiency and low-harmonic LED power supply with an automatic light meter that throws light on comprises the EMI filter circuit, current rectifying and wave filtering circuit, pfc circuit, LLC circuit, high frequency transformer and the rectifier filter circuit that connect successively; Current rectifying and wave filtering circuit also connects with the auxiliary power supply circuit, and the auxiliary power supply circuit is respectively to pfc circuit, LLC circuit auxiliary power supply; The input of the output termination constant-voltage control circuit of rectifier filter circuit arrives the LLC circuit again; Rectifier filter circuit is powered to LED lamp group through constant-current drive circuit.
The beneficial effects of the utility model are that circuit structure is simple, significantly improves the life-span of LED, has good road lighting effect, has improved road safety greatly; Can be according to time period, weather, ambient brightness different with an automatic light meter, thereby reach purpose of energy saving, make the energy-saving effect of LED illumination more remarkable, more according to competitive.Be applicable to LED road lamp switch power supply.
Description of drawings
Fig. 1 is the utility model circuit block diagram;
Fig. 2 is a constant-current drive circuit schematic diagram in the utility model.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
As Fig. 1, the high-efficiency and low-harmonic LED power supply with an automatic light meter that throws light on comprises the EMI filter circuit 1, current rectifying and wave filtering circuit 2, pfc circuit 3, LLC circuit 4, high frequency transformer 5 and the rectifier filter circuit 6 that connect successively; Current rectifying and wave filtering circuit 2 also connects with auxiliary power supply circuit 7, and auxiliary power supply circuit 7 is respectively to pfc circuit 3, LLC circuit 4 auxiliary power supplies; The input of the output termination constant-voltage control circuit 8 of rectifier filter circuit 6 arrives LLC circuit 4 again; Rectifier filter circuit 6 is powered to LED lamp group 10 through constant-current drive circuit 9.
After the input of alternating current 220V civil power, through 1 (the electromagnetic interference filtering) of EMI filter circuit, leach the interfering signal in the electrical network, also isolate pollution to electrical network, send into pfc circuit 3 (PFC) and auxiliary power supply circuit 7 (for all chip power supplies on the power supply) through current rectifying and wave filtering circuit 2 then, voltage signal after the correction is converted to high frequency ac signal and step-down through LLC control circuit 4 and high frequency transformer 5, be DC voltage through rectifier filter circuit 6 then, circuit at the corresponding levels carries out constant voltage control by constant-voltage control circuit 8, fix voltage of output, can satisfy the forward voltage drop difference of LED lamp.
A LED street lamp needs plurality of LEDs lamp pearl, considers that from secure context driving voltage can not be too high, so it is in parallel to be divided into many groups to plurality of LEDs lamp pearl, and every group brightness needs unanimity, so every group electric current must be identical, and can not the phase mutual interference between the group, so be many groups, exports power supply.Because LED lamp group 10 needs constant current to drive, thus every group increase one-level constant-current drive circuit 9 again, for it provides a constant electric current, thus the life-span of improving LED.Constant-current drive circuit 9 adopts the light modulation of PWM (pulsewidth modulation) mode, and its advantage is high-quality white light can be provided, the efficient height.
As Fig. 2, constant-current drive circuit 9 is made of constant flow module and peripheral circuit, and the output of its VIN pin and rectifier filter circuit 6 links, VIN foot meridian capacitor C
INGround connection, and through resistance R
ONTo the emitter stage of triode Q1, its colelctor electrode connects the RON pin of constant flow module, and base stage meets output V
OTo the positive pole of LED lamp group 10, BOOT foot meridian capacitor C
BTo the SW pin, the SW pin connects the negative pole of diode D1 to ground, and the SW pin connects inductance L 1 to output V
O, CS pin connecting resistance R
SNSTo ground, the CS pin connects the negative pole of LED lamp group 10, VCC foot meridian capacitor C
FTo ground; The DIM pin receives the output signal of pwm pulse generator 11, and its input signal is provided by testing circuit 12.
The constant flow module model is LM3402/02HV, and LED lamp group is connected on V
OAnd between the CS pin, resistance R
SNSThe electric current I on the LED lamp group 10 is flow through in detection
F, adjust resistance R
SNSResistance, the voltage that makes the CS pin is 0.2V, when the electric current that flows through LED lamp group 10 raise (or reduction), chip LM3402/02HV then reduced (or rising) output, makes the electric current I that flows through on the LED lamp group 10
FConstant.Receive the pulse signal of pwm pulse generator 11 when the DIM pin after, the CS pin only limits maximum output current, and the size of actual output current is by the pwm pulse dutycycle size decision of DIM pin input, thereby reaches the purpose of light modulation.
Testing circuit detects extraneous weather condition, and information such as ambient brightness are sent into pwm pulse generator 11 then, be converted to corresponding pwm pulse signal, send into the DIM pin of constant-current drive circuit 9 chips then, the size of current of control output, thus reach purpose with an automatic light meter.
LLC circuit 4 adopts ZVS (ZVT) and ZCS (Zero Current Switch), has reduced switching loss, make power supply reach more high efficiency, and harmonic wave is low.
Claims (2)
1. high-efficiency and low-harmonic LED power supply with an automatic light meter that throws light on comprises the EMI filter circuit (1), current rectifying and wave filtering circuit (2), pfc circuit (3), LLC circuit (4), high frequency transformer (5) and the rectifier filter circuit (6) that connect successively; Current rectifying and wave filtering circuit (2) also connects with auxiliary power supply circuit (7), and auxiliary power supply circuit (7) is respectively to pfc circuit (3), LLC circuit (4) auxiliary power supply; The input of the output termination constant-voltage control circuit (8) of rectifier filter circuit (6) arrives LLC circuit (4) again; It is characterized in that rectifier filter circuit (6) is powered to LED lamp group (10) through constant-current drive circuit (9).
2. the high-efficiency and low-harmonic LED according to claim 1 power supply with an automatic light meter that throws light on, it is characterized in that, described constant-current drive circuit (9) is made of constant flow module and peripheral circuit, and the output of its VIN pin and rectifier filter circuit (6) links, VIN foot meridian capacitor C
INGround connection, and through resistance R
ONTo the emitter stage of triode Q1, its colelctor electrode connects the RON pin of constant flow module, and base stage meets output V
OTo the positive pole of LED lamp group (10), BOOT foot meridian capacitor C
BTo the SW pin, the SW pin connects the negative pole of diode D1 to ground, and the SW pin connects inductance L 1 to output V
O, CS pin connecting resistance R
SNSTo ground, the CS pin connects the negative pole of LED lamp group (10), VCC foot meridian capacitor C
FTo ground; The DIM pin receives the output signal of pwm pulse generator (11), and its input signal is provided by testing circuit (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201384063U CN201688251U (en) | 2010-03-22 | 2010-03-22 | High-efficiency low-harmonic LED lighting automatic dimming power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201384063U CN201688251U (en) | 2010-03-22 | 2010-03-22 | High-efficiency low-harmonic LED lighting automatic dimming power supply |
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| Publication Number | Publication Date |
|---|---|
| CN201688251U true CN201688251U (en) | 2010-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201384063U Expired - Fee Related CN201688251U (en) | 2010-03-22 | 2010-03-22 | High-efficiency low-harmonic LED lighting automatic dimming power supply |
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| CN (1) | CN201688251U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170735A (en) * | 2011-06-10 | 2011-08-31 | 林万炯 | Dimming circuit of high-power LED (Light-emitting Diode) lamp |
| CN102510614A (en) * | 2011-10-25 | 2012-06-20 | 上海大学 | LED (light-emitting diode) multi-lamp distributed group drive system |
| CN102740526A (en) * | 2011-03-31 | 2012-10-17 | 海洋王照明科技股份有限公司 | Modularized LED drive circuit |
-
2010
- 2010-03-22 CN CN2010201384063U patent/CN201688251U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102740526A (en) * | 2011-03-31 | 2012-10-17 | 海洋王照明科技股份有限公司 | Modularized LED drive circuit |
| CN102740526B (en) * | 2011-03-31 | 2015-03-11 | 海洋王照明科技股份有限公司 | Modularized LED drive circuit |
| CN102170735A (en) * | 2011-06-10 | 2011-08-31 | 林万炯 | Dimming circuit of high-power LED (Light-emitting Diode) lamp |
| CN102510614A (en) * | 2011-10-25 | 2012-06-20 | 上海大学 | LED (light-emitting diode) multi-lamp distributed group drive system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101229 Termination date: 20160322 |
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| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Peng Yong Document name: Notification of Termination of Patent Right |