CN103068125A - Solar energy supply light-emitting diode (LED) constant current driving power with controllable voltage - Google Patents
Solar energy supply light-emitting diode (LED) constant current driving power with controllable voltage Download PDFInfo
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- CN103068125A CN103068125A CN2012105821956A CN201210582195A CN103068125A CN 103068125 A CN103068125 A CN 103068125A CN 2012105821956 A CN2012105821956 A CN 2012105821956A CN 201210582195 A CN201210582195 A CN 201210582195A CN 103068125 A CN103068125 A CN 103068125A
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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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Abstract
The invention discloses a solar energy supply light-emitting diode (LED) constant current driving power with controllable voltage, wherein the solar energy supply LED constant current driving power with the controllable voltage is simple in structure, high in transfer efficiency and wide in output voltage range, and use cost can be reduced. The solar energy supply 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 pulse-width modulation (PWM) power driving circuit, and the output 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 corresponding to an undervoltage detection circuit, an undervoltage feedback circuit, an overvoltage detection circuit and an overvoltage feedback circuit.
Description
Technical field
The present invention 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 is so that its volume is little, lightweight, energy consumption is low, long advantages such as (reaching 100,000 hours) of safe and reliable, life-span is in the extensive use of a plurality of fields.Because the brightness of LED is controlled by regulating electric current, therefore needs 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 that conversion efficiency is higher than 90% constant-current driving power supply complex structure, manufacturing cost is high.
Summary of the invention
The present invention 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 invention 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 with current signal, output circuit also respectively accordingly by undervoltage detection circuit, under-voltage feedback circuit and over-voltage detection circuit, overvoltage feedback circuit with 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 the 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 the 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 G1-2 is connected to resistance R 6 with the optocoupler receiving element.
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 the 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 join with resistance R 6 after optocoupler receiving element G1-2 is in parallel.
Described timing circuit is made of the resistance R 7 that is in series and capacitor C 2.
Described gain and frequency adjustment circuit are made of the resistance R 8 that is in parallel and capacitor C 3.
The present invention is conversion efficiency high (92% ~ 96%) not only, and can be LED and provide invariance degree less than 1% operating current, makes LED be 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 namely output voltage can be two orders of magnitude (zooming in or out 100 times) of input voltage, to satisfy the unequally loaded needs; Set undervoltage detection circuit, over-voltage detection circuit can in time find under-voltage, the overvoltage phenomenon of output voltage and by feedback, regulate and correct, reliability is improved.The present invention is simple in structure, and with solar energy as power supply, reduced manufacturing cost and the use cost of product.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the embodiment of the invention.
Fig. 2 is the concrete line map of the embodiment of the invention.
Embodiment
As shown in Figure 1: the energy-storage travelling wave tube that the embodiment of the invention 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 with current signal, output circuit also respectively accordingly by undervoltage detection circuit, under-voltage feedback circuit and over-voltage detection circuit, overvoltage feedback circuit with under-voltage, overvoltage signal feedback to the PWM power driving circuit.
Concrete circuit is as shown in Figure 2: the solar charging circuit CD that is made of solar panels etc. is arranged, be connected to resistance R 1 and the LED 1 that is in series with solar charging circuit CD, 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 the 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 is by the output control 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 " 7 " pin with PWM power drives chip IC 1, for PWM power drives chip IC 1 provides operating voltage.Timing circuit is made of the resistance R 7 that is 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 are made of the resistance R 8 that is in parallel and capacitor C 3, be connected to " 1 " pin of PWM power drives chip IC 1, be used 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 the source electrode, " 6 " pin of capacitor C 6 and PWM power drives chip IC 1 joins.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 " 3 " pin of capacitor C 4 and PWM power drives chip IC 1 joins.
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 the 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, G1-2 is connected to resistance R 6 with the optocoupler receiving element, " 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 the 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 join with resistance R 6 after optocoupler receiving element G1-2 is in parallel, also provide operating voltage by PWM power drives chip IC 1 " 8 " pin, 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 is lower than set point, outputs signal to charging control circuit, and it is super capacitor C10 charging that charging control circuit is then controlled solar charging circuit CD; When detection voltage is higher than set point, output signal to charging control circuit, charging control circuit is then controlled solar charging circuit CD and is stopped the charging for super capacitor C10.
2. closing switch K1, then energy-storage travelling wave tube provides operating voltage for the PWM power driving circuit, and the PWM power driving circuit is carried out the PWM pulse-width modulation by output circuit control metal-oxide-semiconductor ON time, discharge when IRLS disconnects, (LED) provides constant electric current for load; Set current detection circuit feeds back to the PWM power driving circuit with current signal, and when output voltage was unusual, the electric current of metal-oxide-semiconductor increased, and when surpassing 1V such as the voltage on the sample resistance, 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 with under-voltage, overvoltage signal feedback to the PWM power driving circuit, the PWM power driving circuit then compares feedback voltage and reference voltage, then the width of the corresponding control of output voltage control pulse.
Claims (9)
1. 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 with current signal, output circuit also respectively accordingly by undervoltage detection circuit, under-voltage feedback circuit and over-voltage detection circuit, overvoltage feedback circuit with 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 the 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 the 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 G1-2 is connected to resistance R 6 with the optocoupler receiving element.
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 the 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 join with resistance R 6 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 is made of the resistance R 7 that is 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 are made of the resistance R 8 that is in parallel and capacitor C 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105821956A CN103068125A (en) | 2012-12-28 | 2012-12-28 | Solar energy supply light-emitting diode (LED) constant current driving power with controllable voltage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105821956A CN103068125A (en) | 2012-12-28 | 2012-12-28 | Solar energy supply light-emitting diode (LED) constant current driving power with controllable voltage |
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| CN103068125A true CN103068125A (en) | 2013-04-24 |
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| CN2012105821956A Pending CN103068125A (en) | 2012-12-28 | 2012-12-28 | Solar energy supply light-emitting diode (LED) constant current driving power with controllable voltage |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2592704Y (en) * | 2003-01-10 | 2003-12-17 | 上海奥威科技开发有限公司 | Solar track spike |
| CN201204722Y (en) * | 2007-12-28 | 2009-03-04 | 王元成 | Automatic light-adjusting LED illumination driver |
| CN201830521U (en) * | 2010-10-19 | 2011-05-11 | 天津光电通信技术有限公司 | Offline type high-power LED (light-emitting diode) constant-current drive power supply |
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2012
- 2012-12-28 CN CN2012105821956A patent/CN103068125A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2592704Y (en) * | 2003-01-10 | 2003-12-17 | 上海奥威科技开发有限公司 | Solar track spike |
| CN201204722Y (en) * | 2007-12-28 | 2009-03-04 | 王元成 | Automatic light-adjusting LED illumination driver |
| CN201830521U (en) * | 2010-10-19 | 2011-05-11 | 天津光电通信技术有限公司 | Offline type high-power LED (light-emitting diode) constant-current drive power supply |
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Application publication date: 20130424 |