CN201781653U - LED emergency illuminating circuit - Google Patents
LED emergency illuminating circuit Download PDFInfo
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- CN201781653U CN201781653U CN2010205320573U CN201020532057U CN201781653U CN 201781653 U CN201781653 U CN 201781653U CN 2010205320573 U CN2010205320573 U CN 2010205320573U CN 201020532057 U CN201020532057 U CN 201020532057U CN 201781653 U CN201781653 U CN 201781653U
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Abstract
The utility model relates to an LED emergency illuminating circuit, which comprises a charger, a lithium ion storage battery, an LED and a driving circuit of the LED. The charger includes a commercial power conversion circuit, a high-frequency isolation transforming circuit, a power switch circuit, a charging voltage output circuit, a voltage-stabilizing sampling feedback circuit and a photoelectric isolator. After the commercial power conversion circuit rectifies and filters alternating-current commercial power, the alternating-current commercial power is added to the high-frequency isolation transforming circuit. A primary input end of a high-frequency transformer is connected with a current input end of the power switch circuit; an auxiliary power source of the high-frequency transformer is connected with a control end of the power switch circuit by the aid of an output end of the photoelectric isolator; the charging voltage output circuit outputs secondary voltage outputted by the high-frequency transformer after rectification and filtering; and the output of the voltage-stabilizing feedback circuit is connected with an input end of the photoelectric isolator. The LED emergency illuminating circuit has the advantages of continuous illumination, low price and long service life.
Description
Technical field
The utility model relates to a kind of LED emergency lighting circuit.
Background technology
At present, emergency light both domestic and external generally adopts incandescent lamp.The advantage of incandescent lamp is a low price, but power consumption is too big, and therefore in order to reach the emergency lighting time of regulation, the capacity of required storage battery is bigger.Some emergency light also adopts electricity-saving lamp, though this light fixture can be saved portion of energy, but DeGrain, the color rendering index of this light fixture is lower simultaneously, and the life-span is also limited.
The emergency lighting circuit generally adopts lead acid accumulator both at home and abroad at present, though this storage battery price is lower, volume and weight is all very big, and the life-span is also very short.For the weight reduction reduced volume, some emergency lighting circuit has adopted nickel-cadmium cell, and this battery can cause serious environmental to pollute, and present most countries strictness forbid producing and using this battery.
In recent years, novel illumination light source (LED) is obtained important breakthrough, and luminous flux can reach every watt 100 lumen, and compares with the brightness incandescent lamp, can save 80% electric energy, and the capacity that reaches same required storage battery of emergency lighting time also can reduce 80%.In addition, the theoretical life-span of LED can reach 100,000 hours, is tens times of incandescent lamp.The LED lamp can save the inverter of present emergency light by DC power supply, and adopting LED is the developing direction of emergency lighting circuit.In recent years, the ferric phosphate lithium cell that a kind of fail safe is good has especially begun to apply.This battery is used for the emergency lighting circuit, not only can reduce the volume and weight of emergency light significantly, can also guarantee the emergency light emergency lighting.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of small product size little, with low cost, can realize the LED emergency lighting circuit of continuous illumination, and for this reason, the utility model adopts following technical scheme:
A kind of LED emergency lighting circuit, comprise charger, lithium-ions battery, LED and drive circuit thereof, charger comprises municipal electric conversion circuit, high-frequency isolation translation circuit, power switch circuit, charging voltage output circuit, voltage stabilizing sampling feedback circuit, photoisolator; The municipal electric conversion circuit to the electric main rectifying and wave-filtering after, be defeated by the high-frequency isolation translation circuit and carry out voltage transitions; The high-frequency isolation translation circuit comprises that one has the high frequency transformer and the auxiliary circuit thereof of three windings at least, the primary input terminal of high frequency transformer connects the current input terminal of described power switch circuit, the accessory power supply of high-frequency isolation translation circuit links to each other with the control end of power switch circuit by the output of photoisolator, export behind the secondary voltage rectifying and wave-filtering of charging voltage output circuit with high frequency transformer output, the output of voltage stabilizing feedback circuit and the input of photoisolator join.
The LED emergency lighting circuit of this practicality, the lithium-ions battery that is adopted is a ferric phosphate lithium cell.In charger circuit, the output of the accessory power supply of high frequency transformer and the positive pole of rectifier diode join, be connected to electric capacity between negative pole and the earth terminal, two outputs of photoelectrical coupler join with the negative pole of rectifier diode and the control end of power switch circuit respectively.
The LED emergency lighting circuit that the utility model provides adopts LED to make light source, and lithium battery is made energy storage unit, is beneficial to the high frequency transformer switching voltage as charge power supply, can realize high brightness, long-life, low cost, uninterrupted emergency lighting.The ferric phosphate lithium cell that the utility model is good especially with fail safe is used for emergency light, not only reduces the volume and weight of emergency light significantly, has also guaranteed the emergency light emergency lighting.
Description of drawings
The structured flowchart of Fig. 1 LED emergency lighting of the present utility model circuit;
The structured flowchart of the charger that Fig. 2 emergency lighting circuit of the present utility model is adopted;
The circuit theory diagrams of the embodiment of first kind of charger that Fig. 3 emergency lighting circuit of the present utility model is adopted;
The circuit theory diagrams of the embodiment of second kind of charger that Fig. 4 emergency lighting circuit of the present utility model is adopted.
Embodiment
Below in conjunction with drawings and Examples the utility model is done further detailed description, LED emergency lighting circuit of the present utility model partly is made up of lithium battery charger, ferric phosphate lithium cell, LED and drive circuit thereof etc., as shown in Figure 1.The AC network power supply just often, AC power is charged to lithium-ions battery through charger on the one hand, guarantee that storage battery is in the full charge state, supply with constant current by drive circuit to LED on the other hand, guarantee that the LED brightness constancy is constant, have no progeny in the Alternating Current Power Supply that storage battery is a power supply state by the floating charge state exchange, can guarantee continuous illumination by drive circuit, the moment illumination can not occur and interrupt.
The structured flowchart of the charger that Fig. 2 is adopted for emergency lighting circuit of the present utility model.Charger of the present utility model comprises municipal electric conversion circuit, high-frequency isolation translation circuit, power switch circuit, charging voltage output circuit, voltage stabilizing sampling feedback circuit, photoisolator; The municipal electric conversion circuit to the electric main rectifying and wave-filtering after, input to the high-frequency isolation translation circuit and carry out voltage transitions; The high-frequency isolation translation circuit is made of high frequency transformer and auxiliary circuit thereof, the primary input terminal of high frequency transformer connects the current input terminal of power switch circuit, the accessory power supply of high-frequency isolation translation circuit links to each other with the control end of power switch circuit by the output of photoisolator, export behind the secondary voltage rectifying and wave-filtering of charging voltage output circuit with high frequency transformer output, the voltage stabilizing feedback circuit plays pressure stabilization function to the charging voltage output circuit, and being used to detect the variation of output voltage, the input of its output and photoisolator joins.
The circuit theory diagrams of the charger that adopts of the present utility model such as Fig. 3, charger adopt switching mode AC-DC converter.The AC220V alternating voltage is added to the T1 high frequency transformer behind D1 and C1` rectifying and wave-filtering.U1 is a power switch pipe, and D2, C2 and R01 form discharge circuit, plays the protection power switch pipe.The primary input terminal of T1 links to each other with the drain electrode of power switch pipe.
The T1 secondary voltage is exported behind D3 and C4 rectifying and wave-filtering.R03, R04, R05, R1, Z01 and Q1 form the voltage stabilizing feedback circuit, when output voltage fluctuation, and the break-make of control photoelectrical coupler IC1, conducting of power controlling switching tube and shutoff again.
The accessory power supply of T1 is by rectifier diode D01, capacitor C 01 ground connection, and lead-out wire is between the two received the grid of power switch pipe by the output of photoelectrical coupler.
Another embodiment of the present utility model as shown in Figure 4, two embodiment circuit theories are basic identical, main distinction point is, what Fig. 3 adopted is switching power tube, what Fig. 4 adopted is a kind of power switch circuit control chip, model is kx4002.
Advantages such as among two embodiment of the present invention, all adopt ferric phosphate lithium cell, this kind battery is a kind of new type lithium ion battery, and it has, and volume is little, in light weight, the life-span long, fail safe is good.In actual applications, require to adopt constant current to change the constant voltage charge pattern, behind the full charge, charging current drops to zero automatically.
The forward voltage of LED has certain dispersiveness, and along with ambient temperature changes and changes, in order to realize permanent brightness illumination, all requires constant current driven.The color rendering index of LED is higher than the numerical value (40) of up-to-date international standard regulation far away greater than 80, under the LED emergency light, can tell the color of various objects very accurately.
The LED light working voltage is lower, power consumption is especially little, emergency light adopts luminous flux can reach the illuminating effect of 30W incandescent lamp up to the 3W LED of 180 lumens, the lighting angle of LED can design as requested in addition, and can increase irradiate light intensity, therefore by installing the method for lens additional, in the illumination zone that requires, lamp illuminance is higher than the requirement of up-to-date international standard far away.Because can reach 50,000 hours the actual life of LED usually, therefore do not need to adopt two bulbs, because required electric weight is very little, therefore selecting a capacity for use is the ferric phosphate lithium cell of 4Ah, the emergency lighting time can reach 4 hours, is higher than the requirement of up-to-date international standard far away.If only require to reach the lighting hours that up-to-date international standard requires, only need to adopt the ferric phosphate lithium cell of a 1Ah, the cost of emergency light can reduce greatly like this.
Claims (3)
1. LED emergency lighting circuit, comprise charger, lithium-ions battery, LED and drive circuit thereof, it is characterized in that described charger comprises municipal electric conversion circuit, high-frequency isolation translation circuit, power switch circuit, charging voltage output circuit, voltage stabilizing sampling feedback circuit, photoisolator; Described municipal electric conversion circuit to the electric main rectifying and wave-filtering after, be defeated by the high-frequency isolation translation circuit and carry out voltage transitions; Described high-frequency isolation translation circuit comprises that one has the high frequency transformer and the auxiliary circuit thereof of three windings at least, the primary input terminal of described high frequency transformer connects the current input terminal of described power switch circuit, the accessory power supply of described high-frequency isolation translation circuit links to each other with the control end of power switch circuit by the output of photoisolator, export behind the secondary voltage rectifying and wave-filtering of described charging voltage output circuit with high frequency transformer output, the output of described voltage stabilizing feedback circuit and the input of photoisolator join.
2. LED emergency lighting circuit according to claim 1 is characterized in that described storage battery is a ferric phosphate lithium cell.
3. LED emergency lighting circuit according to claim 1, it is characterized in that, the output of the accessory power supply of described high frequency transformer and the positive pole of rectifier diode join, be connected to electric capacity between negative pole and the earth terminal, two outputs of photoelectrical coupler join with the negative pole of rectifier diode and the control end of power switch circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205320573U CN201781653U (en) | 2010-09-09 | 2010-09-09 | LED emergency illuminating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205320573U CN201781653U (en) | 2010-09-09 | 2010-09-09 | LED emergency illuminating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201781653U true CN201781653U (en) | 2011-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205320573U Expired - Fee Related CN201781653U (en) | 2010-09-09 | 2010-09-09 | LED emergency illuminating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201781653U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395184A (en) * | 2017-08-28 | 2017-11-24 | 武汉华海通用电气有限公司 | One kind monitors integrated diode array driving power soft switch circuit |
-
2010
- 2010-09-09 CN CN2010205320573U patent/CN201781653U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395184A (en) * | 2017-08-28 | 2017-11-24 | 武汉华海通用电气有限公司 | One kind monitors integrated diode array driving power soft switch circuit |
| CN107395184B (en) * | 2017-08-28 | 2023-10-27 | 武汉华海通用电气有限公司 | Monitoring integrated diode array driving power soft switching circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110330 Termination date: 20130909 |