CN102723771A - Power supply automatic switching circuit for double-power-supply LED (Light-Emitting Diode) street lamp - Google Patents

Power supply automatic switching circuit for double-power-supply LED (Light-Emitting Diode) street lamp Download PDF

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Publication number
CN102723771A
CN102723771A CN2012102018119A CN201210201811A CN102723771A CN 102723771 A CN102723771 A CN 102723771A CN 2012102018119 A CN2012102018119 A CN 2012102018119A CN 201210201811 A CN201210201811 A CN 201210201811A CN 102723771 A CN102723771 A CN 102723771A
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China
Prior art keywords
power supply
power
led
output
street lamp
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Pending
Application number
CN2012102018119A
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Chinese (zh)
Inventor
于治楼
胡大奎
刘军齐
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Shandong Inspur Huaguang Lighting Co Ltd
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Shandong Inspur Huaguang Lighting Co Ltd
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Priority to CN2012102018119A priority Critical patent/CN102723771A/en
Publication of CN102723771A publication Critical patent/CN102723771A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a power supply automatic switching circuit for a double-power-supply LED (Light-Emitting Diode) street lamp. The power supply automatic switching circuit comprises a first LED street lamp power supply and a second LED street lamp power supply, wherein the first LED street lamp power supply and the second LED street lamp power supply are respectively connected with an electric supply input, a relay control circuit and a current backflow prevention circuit; the relay control circuit is connected with an output detection circuit; the output detection circuit is connected with the output of the first LED power supply; and the outputs of the first LED street lamp power supply and the second LED street lamp power supply are connected with an optical machine module through the current backflow prevention circuit. With the adoption of the power supply automatic switching circuit for the double-power supply LED street lamp disclosed by the invention, when one power supply is damaged, the power supply automatic switching circuit can automatically switch the power supply to the other power supply, so that the normal work of the LED street lamp can be ensured; the economical loss brought by repairing and maintenance can be reduced; and the service life of the street lamp is prolonged.

Description

A kind of duplicate supply LED road lamp power supply automatic switch-over circuit
Technical field
The invention belongs to LED lamp technical field, relate to a kind of duplicate supply LED road lamp power supply automatic switch-over circuit.
Background technology
It is long that the LED street lamp has brightness height, life-span, plurality of advantages such as energy-conserving and environment-protective; But the LED street lamp also comes with some shortcomings, and present LED street lamp fault all is road lamp power supply problem and causing more than 90%.Because the LED power is big, receive the restriction of factors such as inner some components and parts of power supply (such as filtering with electrochemical capacitor, rectifying tube, metal-oxide-semiconductor etc.), production, environment, the life-span of LED power supply generally is not very high; This just causes the LED street lamp can use 50,000 hours originally; But owing to receive the restriction of power supply, and actually can use 30,000 hours.
The LED street lamp fault will bring a lot of problems.As: cause road illumination to reduce, influence the normal traffic of road; With " life-span the is long " contradiction in the LED street lamp advantage, cause people to LED long query of illumination life-span; Secondly, street lamp fault, its maintenance, maintenance cost are very high, cause loss economically.In theory, the life-span of the life-span of LED street lamp and LED power supply is suitable.
So, if adopt the control of duplicate supply street lamp, when one of them power supply breaks down damage, can automatically switch to another power supply, can not influence the operate as normal of street lamp, the life-span of street lamp can prolong more than 1 times; Can reduce the maintenance of LED street lamp, maintenance cost reduces loss economically, and road traffic can not be affected.
Summary of the invention
For addressing the above problem, the object of the present invention is to provide a kind of duplicate supply LED road lamp power supply automatic switch-over circuit.
For realizing above-mentioned purpose, technical scheme of the present invention is:
A kind of duplicate supply LED road lamp power supply automatic switch-over circuit includes first, second LED road lamp power supply, and wherein, this first, second LED road lamp power supply is connected with civil power input, control relay circuit and anti-electric current back flow circuit respectively; Control relay circuit is connected with output detection circuit, and this output detection circuit connects the output of a LED power supply; The output of first, second LED road lamp power supply connects the ray machine module through anti-electric current back flow circuit.
Further, said output detection circuit detects through the output to a LED road lamp power supply, and testing result is fed back to control relay circuit, controls the switching of first, second LED road lamp power supply.
Further, said output detection circuit includes the 6th resistance and the 7th resistance of the Vout pin of the 5th resistance, the voltage checking chip that is connected with the 5th resistance and connection voltage checking chip.
Further, said control relay circuit includes switch and the 3rd diode; Wherein, when power supply POWER_1 operate as normal, the 12V effect of DC of voltage checking chip output is in relay switch, and the contact of switch is broken off, and the input of power supply POWER_2 breaks off, and power supply POWER_1 works independently; When power supply POWER_1 failover is damaged, the output of voltage checking chip no-voltage, the relay power down, the closing of contact of switch, the input of automatic energized POWER_2, the POWER_2 operate as normal, thus the power supply of accomplishing duplicate supply LED lamp automaticallyes switch.
Further, said anti-electric current back flow circuit includes high-power three end rectifier diodes, and wherein, 1 pin of high-power three end rectifier diodes links to each other with the output cathode of POWER_2, and 2 pin of high-power three end rectifier diodes link to each other with the output cathode of POWER_2.
When a power supply damages, can switch to another power supply automatically in the duplicate supply LED road lamp power supply automatic switch-over circuit of the present invention, guarantee the operate as normal of LED street lamp; Reduce maintenance, safeguard the loss economically that brings; Prolong the useful life of street lamp.
Description of drawings
Fig. 1 is a structure principle chart of the present invention;
Fig. 2 is a circuit diagram of the present invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Please with reference to Fig. 1, shown in 2; Duplicate supply LED road lamp power supply automatic switch-over circuit of the present invention includes first, second LED road lamp power supply 1,2, wherein; First, second LED road lamp power supply 1,2 is connected with civil power input, control relay circuit and anti-electric current back flow circuit respectively; Control relay circuit is connected with output detection circuit, and this output detection circuit connects the output of a LED power supply; The output of first, second LED road lamp power supply 1,2 connects the ray machine module through anti-electric current back flow circuit.
Output detection circuit detects through the output to a LED road lamp power supply 1, and testing result is fed back to control relay circuit, controls the switching of first, second LED road lamp power supply 1,2; And anti-electric current back flow circuit is in order to stop influencing each other, restricting of first, second LED road lamp power supply 1,2.
Please with reference to shown in Figure 2, output detection circuit includes the 5th resistance R 5, the voltage checking chip U1 that is connected with the 5th resistance and the 6th resistance R 6 and the 7th resistance R 7 that connects the Vout pin of U1.During because of LED power supply output open circuit, its output voltage is high by about 20% during than operate as normal, and in order to prevent because of the power supply output open circuit, U1 damages because of input voltage is too high, and the 5th resistance R 5 of connecting is carried out dividing potential drop and current limliting.When power supply POWER_1 operate as normal, the direct current of U1 output 12V; And when power supply POWER_1 failover is damaged, the U1 no-output.
Control relay circuit includes K switch 2 and the 3rd diode D3.Wherein, when power supply POWER_1 operate as normal, the 12V effect of DC of U1 output is in relay switch K2, and the contact 1-3 of switch breaks off, and the input of power supply POWER_2 breaks off, and power supply POWER_1 works independently; When power supply POWER_1 failover is damaged, the output of U1 no-voltage, the relay power down, contact 1-3 is closed, the input of automatic energized POWER_2, the POWER_2 operate as normal, the power supply of accomplishing duplicate supply LED lamp automaticallyes switch.
Anti-electric current back flow circuit includes high-power three end rectifier diode D1, and 1 pin of D1 links to each other with the output cathode of POWER_2, and 2 pin link to each other with the output cathode of POWER_2; No matter be power supply POWER_2 or power supply POWER_1 when working independently, the 2 pin output of electric current from high-power three end rectifier diode D1 all can be arranged, thereby prevent that electric current from pouring in down a chimney.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (5)

1. duplicate supply LED road lamp power supply automatic switch-over circuit; It is characterized in that: include first, second LED road lamp power supply; Wherein, this first, second LED road lamp power supply is connected with civil power input, control relay circuit and anti-electric current back flow circuit respectively; Control relay circuit is connected with output detection circuit, and this output detection circuit connects the output of a LED power supply; The output of first, second LED road lamp power supply connects the ray machine module through anti-electric current back flow circuit.
2. duplicate supply LED road lamp power supply automatic switch-over circuit according to claim 1; It is characterized in that: said output detection circuit detects through the output to a LED road lamp power supply; And testing result fed back to control relay circuit, control the switching of first, second LED road lamp power supply.
3. like the said duplicate supply LED of claim 2 road lamp power supply automatic switch-over circuit, it is characterized in that: the 6th resistance and the 7th resistance that said output detection circuit includes the 5th resistance, the voltage checking chip that is connected with the 5th resistance and connects the Vout pin of voltage checking chip.
4. like the said duplicate supply LED of claim 3 road lamp power supply automatic switch-over circuit, it is characterized in that: said control relay circuit includes switch and the 3rd diode; Wherein, when power supply POWER_1 operate as normal, the 12V effect of DC of voltage checking chip output is in relay switch, and the contact of switch is broken off, and the input of power supply POWER_2 breaks off, and power supply POWER_1 works independently; When power supply POWER_1 failover is damaged, the output of voltage checking chip no-voltage, the relay power down, the closing of contact of switch, the input of automatic energized POWER_2, the POWER_2 operate as normal, thus the power supply of accomplishing duplicate supply LED lamp automaticallyes switch.
5. like the said duplicate supply LED of claim 4 road lamp power supply automatic switch-over circuit; It is characterized in that: said anti-electric current back flow circuit includes high-power three end rectifier diodes; Wherein, 1 pin of high-power three end rectifier diodes links to each other with the output cathode of POWER_2, and 2 pin of high-power three end rectifier diodes link to each other with the output cathode of POWER_2.
CN2012102018119A 2012-06-19 2012-06-19 Power supply automatic switching circuit for double-power-supply LED (Light-Emitting Diode) street lamp Pending CN102723771A (en)

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Application Number Priority Date Filing Date Title
CN2012102018119A CN102723771A (en) 2012-06-19 2012-06-19 Power supply automatic switching circuit for double-power-supply LED (Light-Emitting Diode) street lamp

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103151829A (en) * 2013-03-12 2013-06-12 重庆九亿光电仪器有限公司 Two-channel direct-current (DC) output waterproof constant current power supply
WO2014180380A1 (en) * 2013-09-24 2014-11-13 中兴通讯股份有限公司 Power source protection device
CN105627225A (en) * 2016-02-23 2016-06-01 繁昌县奉祥光电科技有限公司 LED lamp with dual light sources

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200969694Y (en) * 2006-10-10 2007-10-31 沈阳斯凯光电科技发展有限公司 Duplicate supply automatic switching LED corridor inductive illuminating apparatus
CN101365284A (en) * 2007-08-08 2009-02-11 厦门金威集团有限公司 Control circuit device having automatic switching light function
CN101977472A (en) * 2010-11-16 2011-02-16 山东华盈电力能源发展有限公司 Efficient LED illuminating lamp
CN202014133U (en) * 2011-04-01 2011-10-19 山东华艺阳光太阳能产业有限公司 Mains supply/storage battery automatic switching system for solar LED (light-emitting diode) street lamp
US20120104858A1 (en) * 2009-06-05 2012-05-03 Polynom Ag Electronic circuit for converting a mains-operated luminaire into an emergency luminaire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200969694Y (en) * 2006-10-10 2007-10-31 沈阳斯凯光电科技发展有限公司 Duplicate supply automatic switching LED corridor inductive illuminating apparatus
CN101365284A (en) * 2007-08-08 2009-02-11 厦门金威集团有限公司 Control circuit device having automatic switching light function
US20120104858A1 (en) * 2009-06-05 2012-05-03 Polynom Ag Electronic circuit for converting a mains-operated luminaire into an emergency luminaire
CN101977472A (en) * 2010-11-16 2011-02-16 山东华盈电力能源发展有限公司 Efficient LED illuminating lamp
CN202014133U (en) * 2011-04-01 2011-10-19 山东华艺阳光太阳能产业有限公司 Mains supply/storage battery automatic switching system for solar LED (light-emitting diode) street lamp

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103151829A (en) * 2013-03-12 2013-06-12 重庆九亿光电仪器有限公司 Two-channel direct-current (DC) output waterproof constant current power supply
CN103151829B (en) * 2013-03-12 2015-04-22 重庆九亿光电仪器有限公司 Two-channel direct-current (DC) output waterproof constant current power supply
WO2014180380A1 (en) * 2013-09-24 2014-11-13 中兴通讯股份有限公司 Power source protection device
CN104467055A (en) * 2013-09-24 2015-03-25 中兴通讯股份有限公司 Power supply protection device
CN104467055B (en) * 2013-09-24 2019-07-05 中兴通讯股份有限公司 A kind of apparatus for protecting power supply
CN105627225A (en) * 2016-02-23 2016-06-01 繁昌县奉祥光电科技有限公司 LED lamp with dual light sources

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Application publication date: 20121010