CN203340358U - Solar energy powered LED constant-current driving power with controllable voltage - Google Patents
Solar energy powered LED constant-current driving power with controllable voltage Download PDFInfo
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- CN203340358U CN203340358U CN2013203564261U CN201320356426U CN203340358U CN 203340358 U CN203340358 U CN 203340358U CN 2013203564261 U CN2013203564261 U CN 2013203564261U CN 201320356426 U CN201320356426 U CN 201320356426U CN 203340358 U CN203340358 U CN 203340358U
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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
Abstract
The utility model discloses a solar energy powered LED constant-current driving power with controllable voltage, wherein the solar energy powered LED constant-current driving power with controllable voltage is simple in structure, high in conversion efficiency and wide in output voltage range, and can reduce the application cost. The solar energy powered LED constant-current driving power with the controllable voltage comprises a solar energy charging circuit and an energy storage element connected with the solar energy charging circuit. Output of the energy storage element is transmitted to a PWM power driving circuit, and the output end of the energy storage element is further connected with a power supply detection circuit which sends a detection signal to a charge control circuit to control the solar energy charging circuit. The PWM power driving circuit is connected with an output circuit, a timing circuit and a transmission gain and frequency adjustment circuit, the output circuit feeds a current signal back to the PWM power driving circuit through a current detection circuit, and the output circuit respectively feeds an undervoltage signal and an overvoltage signal back to the PWM power driving circuit correspondingly through an undervoltage detection circuit, an undervoltage feedback circuit, an overvoltage detection circuit and an overvoltage feedback circuit.
Description
Technical field
The utility model relates to a kind of LED constant-current driving power supply, especially a kind of simple in structure, conversion efficiency is high, output voltage range is wide and can reduce the solar powered of use cost and LED constant-current driving power supply that voltage is controlled.
Background technology
At present, LED so that its volume is little, lightweight, energy consumption is low, safe and reliable, long advantages such as (reaching 100,000 hours) of life-span is in the extensive use of a plurality of fields.Because the brightness of LED is controlled by regulating electric current, therefore need constant-current driving power supply that power supply (high pressure industrial frequency AC, low pressure industrial frequency AC, low-voltage direct, high voltage direct current etc.) is converted to specific electric current and voltage.Existing LED constant-current driving power supply kind is more, but output voltage range is limited and power factor (PF) is lower mostly, and general conversion efficiency is only 80% ~ 90%, and conversion efficiency is high higher than 90% constant-current driving power supply complex structure, manufacturing cost.
Summary of the invention
The utility model is in order to solve the existing above-mentioned technical problem of prior art, provides that a kind of conversion efficiency is high, output voltage range is wide and can reduce the solar powered of use cost and LED constant-current driving power supply that voltage is controlled.
Technical solution of the present utility model is: a kind of solar powered and LED constant-current driving power supply that voltage is controlled, and the energy-storage travelling wave tube that is provided with solar charging circuit and joins with solar charging circuit, the PWM power driving circuit is delivered in the output of energy-storage travelling wave tube; Also be connected to the power supply testing circuit with the output of energy-storage travelling wave tube, the detection signal of power supply testing circuit output is delivered to charging control circuit in order to control solar charging circuit; Be connected to output circuit, timing circuit and gain and frequency adjustment circuit with the PWM power driving circuit, output circuit feeds back to the PWM power driving circuit by current detection circuit by current signal, output circuit also respectively accordingly by undervoltage detection circuit, under-voltage feedback circuit and over-voltage detection circuit, overvoltage feedback circuit by under-voltage, overvoltage signal feedback to the PWM power driving circuit.
Described power supply testing circuit is provided with operational amplifier IC2, the in-phase end of operational amplifier IC2 provides reference voltage by resistance R 5, the end of oppisite phase of operational amplifier IC2 provides detection voltage by resistance R 4 and resistance R 9, be connected to resistance R 3 between end of oppisite phase and output, the output of operational amplifier IC2 and resistance R 23 are joined.
The switching circuit that described charging control circuit is comprised of triode V1 and resistance R 2.
Described PWM power driving circuit is PWM power drives chip IC 1, described output circuit is provided with pulse transformer TF2, the elementary capacitor C 6 that is connected to pulse transformer TF2, the secondary of pulse transformer TF2 joined with field effect transistor IRLS by capacitor C 5, resistance R 11, and resistance R 10, voltage-stabiliser tube DZ1 are connected in parallel between the grid and source electrode of field effect transistor IRLS.
Described current detection circuit is provided with the instrument transformer TF1 that the source electrode with field effect transistor IRLS joins, and the filter that the output of instrument transformer TF1 and resistance R 12 and capacitor C 4 form joins.Described undervoltage detection circuit is provided with operational amplifier IC3, the end of oppisite phase of operational amplifier IC3 provides reference voltage by resistance R 13, the in-phase end of operational amplifier IC3 provides detection voltage by resistance R 17 and resistance R 16, be connected to the capacitor C 8 and the resistance R 14 that are in parallel between end of oppisite phase and output, the output of operational amplifier IC3 joins with optocoupler light-emitting component G1-1 and resistance R 15; Described under-voltage feedback circuit is to be provided with the optocoupler receiving element G1-2 corresponding with optocoupler light-emitting component G1-1, and with the optocoupler receiving element, G1-2 is connected to resistance R 6.
Described over-voltage detection circuit is provided with operational amplifier IC4, the end of oppisite phase of operational amplifier IC4 provides reference voltage by resistance R 20, the in-phase end of operational amplifier IC4 provides detection voltage by resistance R 18 and resistance R 19, be connected to voltage-stabiliser tube DZ2 with resistance R 18 and resistance R 19, be connected to the capacitor C 9 and the resistance R 21 that are in parallel between the end of oppisite phase of operational amplifier IC4 and output, the output of operational amplifier IC4 joins with optocoupler light-emitting component G2-1 and resistance R 15; Described overvoltage feedback circuit is to be provided with the optocoupler receiving element G2-2 corresponding with optocoupler light-emitting component G2-1, optocoupler receiving element G2-2 with resistance R 6, join after optocoupler receiving element G1-2 is in parallel.
Described timing circuit consists of the resistance R 7 be in series and capacitor C 2.
Described gain and frequency adjustment circuit consist of the resistance R 8 be in parallel and capacitor C 3.
The utility model is conversion efficiency high (92% ~ 96%) not only, and can be the operating current that LED provides invariance degree to be less than 1%, makes LED in stable operating state, avoids causing current fluctuation on the LED impact in useful life because of variation of ambient temperature; Voltage output range is wide simultaneously, and output voltage can be two orders of magnitude (zooming in or out 100 times) of input voltage, to meet the unequally loaded needs; Set undervoltage detection circuit, over-voltage detection circuit can find in time under-voltage, the overvoltage phenomenon of output voltage and by feedback, regulate and correct, reliability is improved.The utility model is simple in structure, and usings solar energy as power supply, has reduced manufacturing cost and the use cost of product.
The accompanying drawing explanation
Fig. 1 is the schematic block circuit diagram of the utility model embodiment.
Fig. 2 is the concrete line map of the utility model embodiment.
Embodiment
As shown in Figure 1: the energy-storage travelling wave tube that the utility model embodiment is provided with solar charging circuit and joins with solar charging circuit, the PWM power driving circuit is delivered in the output of energy-storage travelling wave tube; Also be connected to the power supply testing circuit with the output of energy-storage travelling wave tube, the detection signal of power supply testing circuit output is delivered to charging control circuit in order to control solar charging circuit; Be connected to output circuit, timing circuit and gain and frequency adjustment circuit with the PWM power driving circuit, output circuit feeds back to the PWM power driving circuit by current detection circuit by current signal, output circuit also respectively accordingly by undervoltage detection circuit, under-voltage feedback circuit and over-voltage detection circuit, overvoltage feedback circuit by under-voltage, overvoltage signal feedback to the PWM power driving circuit.
Concrete circuit is as shown in Figure 2: the solar charging circuit CD consisted of solar panels etc. is arranged, be connected to solar charging circuit CD resistance R 1 and the LED 1 be in series, the output of solar charging circuit CD is joined by diode D1 and energy-storage travelling wave tube (super capacitor C10), realizes energy-storage travelling wave tube is charged.The power supply testing circuit is provided with operational amplifier IC2, the in-phase end of operational amplifier IC2 provides reference voltage by resistance R 5, the end of oppisite phase of operational amplifier IC2 provides detection voltage by resistance R 4 and resistance R 9, resistance R 9 is joined with the output of energy-storage travelling wave tube, be connected to resistance R 3 between the end of oppisite phase of operational amplifier IC2 and output, the output of operational amplifier IC2 and resistance R 23 are joined; The switching circuit that charging control circuit is comprised of triode V1 and resistance R 2, controlled by the output of operational amplifier IC2.
The PWM power driving circuit adopts PWM power drives chip IC 1(UC3842), the output of super capacitor C10 is joined by K switch 1 and " 7 " pin of PWM power drives chip IC 1, for PWM power drives chip IC 1 provides operating voltage.Timing circuit consists of the resistance R 7 be in series and capacitor C 2, is connected to " 4 " pin of PWM power drives chip IC 1, and its capacity-resistance time constant determines the operating frequency of PWM power drives chip IC 1 internal oscillator; Gain and frequency adjustment circuit consist of the resistance R 8 be in parallel and capacitor C 3, be connected to " 1 " pin of PWM power drives chip IC 1, for improving gain and the frequency characteristic of PWM power drives chip IC 1 internal error amplifier, " 5 " pin of PWM power drives chip IC 1 is common." 6 " pin and the output circuit of PWM power drives chip IC 1 join, output circuit is provided with pulse transformer TF2, the elementary capacitor C 6 that is connected to pulse transformer TF2, pulse transformer TF2's is secondary by capacitor C 5, resistance R 11 and field effect transistor IRLS(N channel MOS tube) join, resistance R 10, voltage-stabiliser tube DZ1 are connected in parallel between the grid and source electrode of field effect transistor IRLS, be connected to diode D2 between the drain electrode of being on the scene effect pipe IRLS and source electrode, capacitor C 6 is joined with " 6 " pin of PWM power drives chip IC 1.Current detection circuit is provided with the instrument transformer TF1 that the source electrode with field effect transistor IRLS joins, and the filter that the output of instrument transformer TF1 and resistance R 12 and capacitor C 4 form joins, and capacitor C 4 is joined with " 3 " pin of PWM power drives chip IC 1.
Undervoltage detection circuit is provided with operational amplifier IC3, the end of oppisite phase of operational amplifier IC3 provides reference voltage by resistance R 13, the in-phase end of operational amplifier IC3 provides detection voltage by resistance R 17 and resistance R 16, be connected to the capacitor C 8 and the resistance R 14 that are in parallel between end of oppisite phase and output, the output of operational amplifier IC3 joins with optocoupler light-emitting component G1-1 and resistance R 15; Under-voltage feedback circuit is to be provided with the optocoupler receiving element G1-2 corresponding with optocoupler light-emitting component G1-1, with the optocoupler receiving element, G1-2 is connected to resistance R 6, " 8 " pin by PWM power drives chip IC 1 provides operating voltage, and feedback signal inputs to " 2 " pin of PWM power drives chip IC 1.
Over-voltage detection circuit is provided with operational amplifier IC4, the end of oppisite phase of operational amplifier IC4 provides reference voltage by resistance R 20, the in-phase end of operational amplifier IC4 provides detection voltage by resistance R 18 and resistance R 19, be connected to voltage-stabiliser tube DZ2 with resistance R 18 and resistance R 19, be connected to the capacitor C 9 and the resistance R 21 that are in parallel between the end of oppisite phase of operational amplifier IC4 and output, the output of operational amplifier IC4 joins with optocoupler light-emitting component G2-1 and resistance R 22; The overvoltage feedback circuit is to be provided with the optocoupler receiving element G2-2 corresponding with optocoupler light-emitting component G2-1, optocoupler receiving element G2-2 with resistance R 6, join after optocoupler receiving element G1-2 is in parallel, also by PWM power drives chip IC 1 " 8 " pin, provide operating voltage, feedback signal inputs to " 2 " pin of PWM power drives chip IC 1.
Output circuit joins with resistance R 13, resistance R 17, resistance R 18 and resistance R 20 respectively by diode D3, capacitor C 7.
Operation principle:
1. set power supply testing circuit detects the voltage (electric weight) of energy-storage travelling wave tube in real time, when voltage, during lower than set point, outputs signal to charging control circuit, and it is super capacitor C10 charging that charging control circuit is controlled solar charging circuit CD; During higher than set point, output signal to charging control circuit when detected voltage, charging control circuit is controlled solar charging circuit CD and is stopped the charging for super capacitor C10.
2. closing switch K1, energy-storage travelling wave tube provides operating voltage for the PWM power driving circuit, and the PWM power driving circuit is controlled the metal-oxide-semiconductor ON time by output circuit, carries out the PWM pulse-width modulation, electric discharge when IRLS disconnects, for load (LED) provides constant electric current; Set current detection circuit feeds back to the PWM power driving circuit by current signal, and when output voltage is abnormal, the electric current of metal-oxide-semiconductor increases, and while as the voltage on sample resistance, surpassing 1V, the PWM power driving circuit just stops output, has effectively protected metal-oxide-semiconductor.
Set undervoltage detection circuit, under-voltage feedback circuit and over-voltage detection circuit, overvoltage feedback circuit by under-voltage, overvoltage signal feedback to the PWM power driving circuit, the PWM power driving circuit compares feedback voltage and reference voltage, then the corresponding width of controlling the voltage control pulse of output.
Claims (9)
1. the LED constant-current driving power supply solar powered and voltage is controlled is characterized in that: the energy-storage travelling wave tube that is provided with solar charging circuit and joins with solar charging circuit, and the PWM power driving circuit is delivered in the output of energy-storage travelling wave tube; Also be connected to the power supply testing circuit with the output of energy-storage travelling wave tube, the detection signal of power supply testing circuit output is delivered to charging control circuit in order to control solar charging circuit; Be connected to output circuit, timing circuit and gain and frequency adjustment circuit with the PWM power driving circuit, output circuit feeds back to the PWM power driving circuit by current detection circuit by current signal, output circuit also respectively accordingly by undervoltage detection circuit, under-voltage feedback circuit and over-voltage detection circuit, overvoltage feedback circuit by under-voltage, overvoltage signal feedback to the PWM power driving circuit.
2. solar powered and LED constant-current driving power supply that voltage is controlled according to claim 1, it is characterized in that: described power supply testing circuit is provided with operational amplifier IC2, the in-phase end of operational amplifier IC2 provides reference voltage by resistance R 5, the end of oppisite phase of operational amplifier IC2 provides detection voltage by resistance R 4 and resistance R 9, be connected to resistance R 3 between end of oppisite phase and output, the output of operational amplifier IC2 and resistance R 23 are joined.
3. solar powered and LED constant-current driving power supply that voltage is controlled according to claim 1, is characterized in that: the switching circuit that described charging control circuit is comprised of triode V1 and resistance R 2.
4. solar powered and LED constant-current driving power supply that voltage is controlled according to claim 1, it is characterized in that: described PWM power driving circuit is PWM power drives chip IC 1, described output circuit is provided with pulse transformer TF2, the elementary capacitor C 6 that is connected to pulse transformer TF2, the secondary of pulse transformer TF2 joined with field effect transistor IRLS by capacitor C 5, resistance R 11, and resistance R 10, voltage-stabiliser tube DZ1 are connected in parallel between the grid and source electrode of field effect transistor IRLS.
5. solar powered and LED constant-current driving power supply that voltage is controlled according to claim 4, it is characterized in that: described current detection circuit is provided with the instrument transformer TF1 that the source electrode with field effect transistor IRLS joins, and the filter that the output of instrument transformer TF1 and resistance R 12 and capacitor C 4 form joins.
6. solar powered and LED constant-current driving power supply that voltage is controlled according to claim 5, it is characterized in that: described undervoltage detection circuit is provided with operational amplifier IC3, the end of oppisite phase of operational amplifier IC3 provides reference voltage by resistance R 13, the in-phase end of operational amplifier IC3 provides detection voltage by resistance R 17 and resistance R 16, be connected to the capacitor C 8 and the resistance R 14 that are in parallel between end of oppisite phase and output, the output of operational amplifier IC3 joins with optocoupler light-emitting component G1-1 and resistance R 15; Described under-voltage feedback circuit is to be provided with the optocoupler receiving element G1-2 corresponding with optocoupler light-emitting component G1-1, and with the optocoupler receiving element, G1-2 is connected to resistance R 6.
7. solar powered and LED constant-current driving power supply that voltage is controlled according to claim 6, it is characterized in that: described over-voltage detection circuit is provided with operational amplifier IC4, the end of oppisite phase of operational amplifier IC4 provides reference voltage by resistance R 20, the in-phase end of operational amplifier IC4 provides detection voltage by resistance R 18 and resistance R 19, be connected to voltage-stabiliser tube DZ2 with resistance R 18 and resistance R 19, be connected to the capacitor C 9 and the resistance R 21 that are in parallel between the end of oppisite phase of operational amplifier IC4 and output, the output of operational amplifier IC4 joins with optocoupler light-emitting component G2-1 and resistance R 15, described overvoltage feedback circuit is to be provided with the optocoupler receiving element G2-2 corresponding with optocoupler light-emitting component G2-1, optocoupler receiving element G2-2 with resistance R 6, join after optocoupler receiving element G1-2 is in parallel.
8. solar powered and LED constant-current driving power supply that voltage is controlled according to claim 4, it is characterized in that: described timing circuit consists of the resistance R 7 be in series and capacitor C 2.
9. solar powered and LED constant-current driving power supply that voltage is controlled according to claim 4, it is characterized in that: described gain and frequency adjustment circuit consist of the resistance R 8 be in parallel and capacitor C 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203564261U CN203340358U (en) | 2013-06-21 | 2013-06-21 | Solar energy powered LED constant-current driving power with controllable voltage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203564261U CN203340358U (en) | 2013-06-21 | 2013-06-21 | Solar energy powered LED constant-current driving power with controllable voltage |
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| CN203340358U true CN203340358U (en) | 2013-12-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103889132A (en) * | 2014-04-17 | 2014-06-25 | 南宁桂格精工科技有限公司 | Constant flow source circuit of automobile headlamp |
| CN106332372A (en) * | 2016-10-18 | 2017-01-11 | 威海金丰电子有限公司 | Area array LED rail transit vehicle illuminating lamp with PWM dimming function |
-
2013
- 2013-06-21 CN CN2013203564261U patent/CN203340358U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103889132A (en) * | 2014-04-17 | 2014-06-25 | 南宁桂格精工科技有限公司 | Constant flow source circuit of automobile headlamp |
| CN106332372A (en) * | 2016-10-18 | 2017-01-11 | 威海金丰电子有限公司 | Area array LED rail transit vehicle illuminating lamp with PWM dimming function |
| CN106332372B (en) * | 2016-10-18 | 2017-11-07 | 威海金丰电子有限公司 | Face matrix LED rail traffic vehicles illuminator with PWM dimming functions |
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Legal Events
| 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 |
Granted publication date: 20131211 Termination date: 20140621 |
|
| EXPY | Termination of patent right or utility model |