CN101790272B - LED light source driver with redundant fault tolerance - Google Patents
LED light source driver with redundant fault tolerance Download PDFInfo
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- CN101790272B CN101790272B CN 201019087046 CN201019087046A CN101790272B CN 101790272 B CN101790272 B CN 101790272B CN 201019087046 CN201019087046 CN 201019087046 CN 201019087046 A CN201019087046 A CN 201019087046A CN 101790272 B CN101790272 B CN 101790272B
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Abstract
The invention discloses an LED light source driver with redundant fault tolerance, which comprises at least one LED driver. The LED light source driver with the redundant fault tolerance also comprises at least one redundancy driver. The power supply output is directly adopted as switching detection and switching energy, the power supply output is directly connected with a relay, and the relay is used as a switching element so as to switch output backups of the LED driver and the redundancy driver. The LED light source driver has the advantages of simplifying the design of circuits, lowering the cost and improving the stability of products.
Description
Technical field
The present invention relates generally to a kind of led light source, specially refers to a kind of redundant drive of led light source.
Background technology
Led light source gets more and more with high-efficiency energy-saving long-life environmental protection (not containing halogen element) and is applied in various occasions, the good led light source life-span of design can reach 50 now, 000 hour life-span, the failure cause of turning off the light above 90% is the damage of driver, improve the life-span of led driver, eliminate the short slab of quality, the life-span equilibrium that makes whole each parts of product is very important studying a question.
In order to solve drive reliability, improve the useful life of led light source, prior art has adopted a kind of simple technology---redundant technique, namely be provided with a reserve driver on the basis of legacy drive, after the power supply of normal operation has not had normal output because of multiple reason (element, external voltage, thunderbolt etc.), circuit can automatically switch on the power supply backup driver of backup, keep light fixture to work normally, guaranteed to use normally at high reliability occasion light fixture, removed the cost of repeatedly safeguarding.Even but like this, because traditional redundancy backup scheme still exists following problem:
1. traditional redundancy backup scheme has special detection and commutation circuit, and the circuit of these detections and switching itself also have integrity problem, problems such as switching of but having no idea when probably occurring needing this switching.For example: notification number is CN201219317, the day for announcing is the Chinese utility model patent on April 8th, 2009, a kind of LED flood light with functions of redundancy and fault tolerance is disclosed, the support that comprise base, is connected with base and the lamp body that is connected with support, lamp body comprises lamp housing and is installed in the interior pcb board of lamp housing, is provided with on the pcb board: LED luminescence unit, driving control chip, signal controlling circuit, a positive source circuit and a power cathode circuit; Described driving control chip is to include at least a redundancy fault-tolerant drive control chip in the described driving control chip, this chip has at least two pairs of parallel signal input parts and signal output part, the every pair of signal input part is connected signal input part and is connected with signal output part by the single line road with signal output part, the signal controlling circuit of at least two functions of redundancy and fault tolerance that walk abreast and have that provide by at least two circuits between the redundancy fault-tolerant drive control chip interconnects.This patented product is exactly to have special detection and commutation circuit, has increased the possibility that goes wrong, also uncontrollable cost.
2. traditional redundancy backup scheme often adopts switching tube, but the knot of the ability of the withstand shock of switching tube and switching tube pressure causes drive efficiency to reduce.Particularly in the situation to large electric current, all the more so.
3. the redundant drive of traditional redundancy backup scheme use is considered the problem of online switching time, even not output of backup part, its importation is also connected at any time, two problems can occur like this: a backup driver is even without output, as long as also can consumed power cause the reduction of integral product efficient and the waste of the energy with inputting to link to each other.When two circuit normally used, spare drive does not break away from whole system completely became real stand-by state, caused spare drive to be in operating state always and also can cause reduce the useful life of element.
Summary of the invention
The present invention has overcome the deficiencies in the prior art, a kind of led light source driver with functions of redundancy and fault tolerance is provided, this led light source driver has been simplified original redundant circuit design, make simultaneously spare drive and break away from completely whole system and be in real stand-by state, except low cost, the useful life of also greatly having improved led light source.
Technical scheme of the present invention is as follows:
A kind of led light source driver with functions of redundancy and fault tolerance, the led driver that comprises at least one, described led light source driver with functions of redundancy and fault tolerance also comprises a redundant drive at least, directly adopt power supply output as the detection of switching and the energy of switching, power supply output is directly linked to each other with relay, adopt relay as switch element, realized that the output backup of led driver and redundant drive is switched.
Further technical scheme is:
Described led driver has two, and redundant drive has one, and described relay has four, is respectively relay K 1, relay K 2, relay K 3, relay K 4.
The part of described led driver and redundant drive is identical, comprising:
Rectification circuit, its input access civil power is Rectified alternating current with civil power by exchange conversion;
Initiatively PFC is serially connected on the output loop of the first rectification circuit, by the phase place that the high-frequency impulse switch is proofreaied and correct input voltage and electric current, whole electrical source power factor is improved;
Power conversion circuit is serially connected on the output loop of PFC initiatively, by power transformer high-tension pulse current is transformed to the alternating current of low-voltage, high-current, and the electrical isolation of high-low pressure is provided simultaneously;
Current rectifying and wave filtering circuit is serially connected on the output loop of power conversion circuit, is the exchange conversion of high frequency high-frequency direct-current, is filtered into simultaneously the very little direct current of ripple;
Output circuit joins with the output of current rectifying and wave filtering circuit, for LED provides constant electric current;
Sampling feedback circuit picks out from output circuit, and the current/voltage that power supply is exported detects, and feed back to the PWM controller, to keep specified electric current that LED is driven, simultaneously power supply output situation is monitored the work of power cutoff when appearance is unusual;
The PWM controller receives feedback signal and the control signal of the first sampling feedback circuit, adjusts peak pulse duration, finishes to adjust outputing to power conversion circuit and delayed startup turn-offs.
The input of described rectification circuit is serially connected with insurance circuit and lightning protection circuit, and wherein the insurance circuit output links to each other with lightning protection circuit, and the lightning protection circuit output connects rectification circuit.
Compared with prior art, the invention has the beneficial effects as follows:
1. directly adopt output as the detection of switching and the energy of switching, traditional redundancy scheme has special detection and commutation circuit, and circuit itself also have an integrity problem, but have no idea when probably occurring needing this switching to switch, so adopt output just to be in well when not have output directly on the power supply of switching as direct driving.
2. adopt relay to back up switching, the knot of considering the ability of withstand shock of switching tube and switching tube is pressed and is caused drive efficiency to reduce, particularly for the situation of large electric current, selecting the normal switch life of long-life relay of totally-enclosed Omron is 5,000,000 times, because relay is only worked once when normally opening, enough can for 50,000 hours life-span of led light source.Using relay to also have a benefit is exactly that relay contact only exists disconnection and contacts two states, has simultaneously the time delays of action need not re-use special circuit design.The current drain of relay work is that 0.03 ampere of whole circuitry consumes power is no more than 0.5 watt simultaneously.Can ignore for whole light fixture consumption.
3. when carrying out Redundancy Design, realized the switching in output switching, inputted, general redundant drive is considered the problem of online switching time, even not output of backup part, the importation is also connected with input at any time, two problems are arranged like this: the one, the backup driver is even without output, as long as also can consumed power cause the reduction of integral product efficient and the waste of the energy with inputting to link to each other, the 2nd, spare drive is in operating state always and also can causes reduce the useful life of element, and can allow the switching time that is used for the hundreds of millisecond of light fixture, the input of finishing the backup driver in the switching that utilizes the multiconductor of relay exporting in when design is switched, and spare drive breaks away from whole system completely when making circuit normal becomes real stand-by state.
4. the long-term of driver is under the higher environment of lamp temperatures without electronic component, and the life-span also can reduce, particularly electrochemical capacitor.So the present invention is exactly the time-delay characteristics of utilizing relay, circuit is worked several seconds accordingly, drive away aqueous vapor and activate electrolyte etc., prolonged the storage life of spare drive
Description of drawings
The circuit of Fig. 1 specific embodiment of the invention connects block diagram
Embodiment
The present invention is further elaborated below in conjunction with accompanying drawing.
A kind of led light source driver with functions of redundancy and fault tolerance, the led driver that comprises at least one, described led light source driver with functions of redundancy and fault tolerance also comprises a redundant drive at least, directly adopt power supply output as the detection of switching and the energy of switching, power supply output is directly linked to each other with relay, adopt relay as switch element, realized that the output backup of led driver and redundant drive is switched.Described led driver has two, and redundant drive has one, and described relay has four, is respectively relay K 1, relay K 2, relay K 3, relay K 4.Method of attachment between two led drivers, redundant drive and the relay is more common method of attachment as shown in Figure 1.The part of described at least one led driver and redundant drive is identical, comprising: rectification circuit, and its input access civil power is Rectified alternating current with civil power by exchange conversion; Initiatively PFC is serially connected on the output loop of the first rectification circuit, by the phase place that the high-frequency impulse switch is proofreaied and correct input voltage and electric current, whole electrical source power factor is improved; Power conversion circuit is serially connected on the output loop of PFC initiatively, by power transformer high-tension pulse current is transformed to the alternating current of low-voltage, high-current, and the electrical isolation of high-low pressure is provided simultaneously; Current rectifying and wave filtering circuit is serially connected on the output loop of power conversion circuit, is the exchange conversion of high frequency high-frequency direct-current, is filtered into simultaneously the very little direct current of ripple; Output circuit joins with the output of current rectifying and wave filtering circuit, for LED provides constant electric current; Sampling feedback circuit picks out from output circuit, and the current/voltage that power supply is exported detects, and feed back to the PWM controller, to keep specified electric current that LED is driven, simultaneously power supply output situation is monitored the work of power cutoff when appearance is unusual; The PWM controller receives feedback signal and the control signal of the first sampling feedback circuit, adjusts peak pulse duration, finishes to adjust outputing to power conversion circuit and delayed startup turn-offs.The input of described rectification circuit is serially connected with insurance circuit and lightning protection circuit, and wherein the insurance circuit output links to each other with lightning protection circuit, and the lightning protection circuit output connects rectification circuit.
Claims (3)
1. led light source driver with functions of redundancy and fault tolerance, the led driver that comprises at least one, described led light source driver with functions of redundancy and fault tolerance also comprises a redundant drive at least, directly adopt power supply output as the detection of switching and the energy of switching, power supply output is directly linked to each other with relay, adopt relay as switch element, the output backup that has realized led driver and redundant drive is switched, it is characterized in that: the part of described led driver and redundant drive is identical, comprise: rectification circuit, its input access civil power is Rectified alternating current with civil power by exchange conversion;
Initiatively PFC is serially connected on the output loop of the first rectification circuit, by the phase place that the high-frequency impulse switch is proofreaied and correct input voltage and electric current, whole electrical source power factor is improved;
Power conversion circuit is serially connected on the output loop of PFC initiatively, by power transformer high-tension pulse current is transformed to the alternating current of low-voltage, high-current, and the electrical isolation of high-low pressure is provided simultaneously;
Current rectifying and wave filtering circuit is serially connected on the output loop of power conversion circuit, is the exchange conversion of high frequency high-frequency direct-current, is filtered into simultaneously the very little direct current of ripple;
Output circuit joins with the output of current rectifying and wave filtering circuit, for LED provides constant electric current;
Sampling feedback circuit picks out from output circuit, and the current/voltage that power supply is exported detects, and feed back to the PWM controller, to keep specified electric current that LED is driven, simultaneously power supply output situation is monitored the work of power cutoff when appearance is unusual;
The PWM controller receives feedback signal and the control signal of the first sampling feedback circuit, adjusts peak pulse duration, finishes to adjust outputing to power conversion circuit and delayed startup turn-offs.
2. the led light source driver with functions of redundancy and fault tolerance as claimed in claim 1, it is characterized in that: described led driver has two, redundant drive has one, and described relay has four, is respectively relay K 1, relay K 2, relay K 3, relay K 4.
3. the led light source driver with functions of redundancy and fault tolerance as claimed in claim 1, it is characterized in that: the input of described rectification circuit is serially connected with insurance circuit and lightning protection circuit, wherein the insurance circuit output links to each other with lightning protection circuit, and the lightning protection circuit output connects rectification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201019087046 CN101790272B (en) | 2010-03-02 | 2010-03-02 | LED light source driver with redundant fault tolerance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201019087046 CN101790272B (en) | 2010-03-02 | 2010-03-02 | LED light source driver with redundant fault tolerance |
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| Publication Number | Publication Date |
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| CN101790272A CN101790272A (en) | 2010-07-28 |
| CN101790272B true CN101790272B (en) | 2013-03-20 |
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| CN 201019087046 Expired - Fee Related CN101790272B (en) | 2010-03-02 | 2010-03-02 | LED light source driver with redundant fault tolerance |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6660773B2 (en) * | 2016-03-04 | 2020-03-11 | ルネサスエレクトロニクス株式会社 | Semiconductor device, light source control device and light source control system |
| CN209448928U (en) * | 2018-10-15 | 2019-09-27 | 深圳市崧盛电子股份有限公司 | A kind of LED power and redundancy LED power |
| CN111624938A (en) * | 2020-06-16 | 2020-09-04 | 河北唐银钢铁有限公司 | Redundant output and optimal switching method based on single set of PLC analog output signals |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2097847A (en) * | 1981-05-01 | 1982-11-10 | Gec Claudgen Ltd | Traffic bollards |
| CN201219317Y (en) * | 2008-05-26 | 2009-04-08 | 北京中庆微数字设备开发有限公司 | LED light projector with redundant fault-tolerance function |
| CN201412739Y (en) * | 2009-04-02 | 2010-02-24 | 王红亚 | Led traffic light |
-
2010
- 2010-03-02 CN CN 201019087046 patent/CN101790272B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2097847A (en) * | 1981-05-01 | 1982-11-10 | Gec Claudgen Ltd | Traffic bollards |
| CN201219317Y (en) * | 2008-05-26 | 2009-04-08 | 北京中庆微数字设备开发有限公司 | LED light projector with redundant fault-tolerance function |
| CN201412739Y (en) * | 2009-04-02 | 2010-02-24 | 王红亚 | Led traffic light |
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|---|---|
| CN101790272A (en) | 2010-07-28 |
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