CN204721669U - A kind of control circuit being applicable to photovoltaic LED lighting system - Google Patents
A kind of control circuit being applicable to photovoltaic LED lighting system Download PDFInfo
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- CN204721669U CN204721669U CN201520400487.2U CN201520400487U CN204721669U CN 204721669 U CN204721669 U CN 204721669U CN 201520400487 U CN201520400487 U CN 201520400487U CN 204721669 U CN204721669 U CN 204721669U
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Abstract
The utility model provides a kind of control circuit being applicable to photovoltaic LED lighting system, described illuminator comprises photovoltaic panel, storage battery, controller and load, it is characterized in that, described control circuit includes a BOOST booster circuit powered to the load to BUCK reduction voltage circuit and of described charge in batteries by described storage battery by described photovoltaic panel, and described controller makes control circuit switch between BUCK reduction voltage circuit and BOOST booster circuit by a switching circuit.Both achieved MPPT charging and constant-current discharge, and in turn simplify circuit, be applicable to very much being applied to photovoltaic LED illuminator.
Description
Technical field
The utility model relates to photovoltaic art, and particularly a kind of succinct circuit topology, is highly suitable for photovoltaic LED lighting system.
Background technology
Along with the development of photovoltaic technology, various field has been widely used in the utilization of solar energy, modal is exactly use solar panels to charge for storage battery, to convert solar energy into electrical energy and to store with storage battery, recycles storage battery and powers to other power consumption equipments.And in the charge circuit, MPPT(MPPT maximum power point tracking) technology is employed more and more widely.Photovoltaic LED lighting system is exactly wherein a kind of typical application, photovoltaic LED illuminator is generally made up of parts such as solar photovoltaic cell panel, storage battery, controller, LED light source and constant-current drive circuits thereof, solar energy is converted to power storage in storage battery by solar energy photovoltaic panel by daytime, be that constant-current drive circuit is powered by storage battery in the evening, and constant-current drive circuit constant current output lights LED light source.At present MPPT charging technique and constant-current drive technology are applied to there is not technology barrier in solar street lamp controller simultaneously, but great majority are merged simply two kinds of technology, there is the shortcoming of circuit complexity.
Utility model content
Technical problem to be solved in the utility model overcomes the deficiencies in the prior art, provides a kind of simplified control circuit, realizes MPPT charging and constant-current discharge simultaneously, be applied to photovoltaic LED lighting system.
In order to solve above technical problem, a kind of control circuit being applicable to photovoltaic LED lighting system of the utility model, described illuminator comprises photovoltaic panel, storage battery, controller and load, wherein, described control circuit includes a BOOST booster circuit powered to the load to BUCK reduction voltage circuit and of described charge in batteries by described storage battery by described photovoltaic panel, and described controller makes control circuit switch between BUCK reduction voltage circuit and BOOST booster circuit by switching circuit.
Preferably, described switching circuit comprises metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4.
Preferably, described control circuit also comprises electric capacity C1, electric capacity C2, electric capacity C3, diode D1, inductance L 1 and inspection leakage resistance R1.
Preferably, the positive pole of described photovoltaic panel is by electric capacity C1 ground connection, the positive pole of described load is by electric capacity C2 ground connection, the positive pole of described storage battery is by electric capacity C3 ground connection, the negative pole of described photovoltaic panel is by metal-oxide-semiconductor Q3 ground connection, the negative pole of described load is by metal-oxide-semiconductor Q4 ground connection, the negative pole of described storage battery is by inspection leakage resistance R1 ground connection, after described metal-oxide-semiconductor Q1 connects with described metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q1 connects the positive pole of photovoltaic panel, metal-oxide-semiconductor Q2 ground connection, the positive pole of described load connects the series connection node of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 by diode D1, the positive pole of described storage battery connects the series connection node of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 by inductance L 1.
Preferably, when metal-oxide-semiconductor Q3 opens, metal-oxide-semiconductor Q4 closes, and when metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 is synchronous complementary PWM operating state, electric capacity C1, electric capacity C3, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, inductance L 1 form BUCK reduction voltage circuit by photovoltaic panel to charge in batteries.
Preferably, detect charging current by inspection leakage resistance R1, adjust the duty ratio of synchronous complementary PWM.
Preferably, when metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q3 closes, metal-oxide-semiconductor Q4 opens, and when metal-oxide-semiconductor Q2 is the work of PWM operating state, electric capacity C3, electric capacity C2, inductance L 1, metal-oxide-semiconductor Q2, diode D1 purchase into BOOST booster circuit, and described storage battery powers to the load.
Beneficial effect: by arranging the setting of the different position of switching tube, thus make all can form BUCK reduction voltage circuit and BOOST booster circuit by single inductance, both achieve MPPT charging and constant-current discharge, in turn simplify circuit.Be applicable to very much being applied to photovoltaic LED illuminator.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Fig. 1 is the control circuit schematic diagram that the utility model is applicable to photovoltaic LED lighting system.
Embodiment
Embodiment:
A kind of control circuit being applicable to photovoltaic LED lighting system of the utility model, described illuminator comprises photovoltaic panel, storage battery, controller and load, wherein, described control circuit includes a BOOST booster circuit powered to the load to BUCK reduction voltage circuit and of described charge in batteries by described storage battery by described photovoltaic panel, and described controller makes control circuit switch between BUCK reduction voltage circuit and BOOST booster circuit by a switching circuit.
As Fig. 1, in the present embodiment, described switching circuit comprises metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4.Described control circuit also comprises electric capacity C1, electric capacity C2, electric capacity C3, diode D1, inductance L 1 and inspection leakage resistance R1.The positive pole of described photovoltaic panel is by electric capacity C1 ground connection, the positive pole of described load is by electric capacity C2 ground connection, the positive pole of described storage battery is by electric capacity C3 ground connection, the negative pole of described photovoltaic panel is by metal-oxide-semiconductor Q3 ground connection, the negative pole of described load is by metal-oxide-semiconductor Q4 ground connection, the negative pole of described storage battery is by inspection leakage resistance R1 ground connection, after described metal-oxide-semiconductor Q1 connects with described metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q1 connects the positive pole of photovoltaic panel, metal-oxide-semiconductor Q2 ground connection, the positive pole of described load connects the series connection node of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 by diode D1, the positive pole of described storage battery connects the series connection node of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 by inductance L 1.
When metal-oxide-semiconductor Q3 opens, metal-oxide-semiconductor Q4 closes, and when metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 is synchronous complementary PWM operating state, electric capacity C1, electric capacity C3, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, inductance L 1 form BUCK reduction voltage circuit by photovoltaic panel to charge in batteries.Detect battery charging current by inspection leakage resistance R1, adjust the duty ratio of synchronous complementary PWM.When metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q3 closes, metal-oxide-semiconductor Q4 opens, and when metal-oxide-semiconductor Q2 is the work of PWM operating state, electric capacity C3, electric capacity C2, inductance L 1, metal-oxide-semiconductor Q2, diode D1 purchase into BOOST booster circuit, and described storage battery powers to the load.
As follows in the course of work of reality:
(1) time close to daybreak, illuminator does not need to throw light on again, and due to the power consumption of a whole night, storage battery needs to charge, and now, controller stops the pwm control signal of metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q2 is made to be in closed condition, metal-oxide-semiconductor Q4 is in closed condition, and storage battery stops, to load (LED light source) power supply, entering preparation charged state.
(2) when photovoltaic panel provides energy enough to charge a battery by the time, controller makes metal-oxide-semiconductor Q3 open, metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 is in synchronous complementary PWM operating state, photovoltaic panel is to charge in batteries, now detect charging current by inspection leakage resistance R1, change PWM duty ratio and carry out maximal power tracing.
(3) time at dusk, photovoltaic panel provides energy faint gradually, for preventing storage battery to photovoltaic panel reverse charging, this Time Controller controls metal-oxide-semiconductor Q3 and closes, when photovoltaic panel provides energy shortage to charge a battery, stop the synchronous complementary PWM control signals of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, controller makes metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 cut out, stop charge in batteries, enter preparation discharge condition.
(4) the further reduction of intensity of illumination, when illuminator reaches discharging condition, controller makes metal-oxide-semiconductor Q4 open, and metal-oxide-semiconductor Q2 is in PWM operating state, powers to load (LED light source).
(5) time close to daybreak, illuminator does not need to throw light on again, and due to the power consumption of a whole night, storage battery needs to charge, and now, controller stops the PWM of metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q2 is made to be in closed condition, metal-oxide-semiconductor Q4 is in closed condition, and storage battery stops, to load (LED light source) power supply, entering preparation charged state.So repeatedly.
It is emphasized that protection range of the present utility model is including but not limited to above-mentioned embodiment.It should be pointed out that for a person skilled in the art, under the prerequisite not departing from the utility model principle, can also make some distortion and improvement, these also should be regarded as belonging to protection range of the present utility model.
Claims (7)
1. one kind is applicable to the control circuit of photovoltaic LED lighting system, described illuminator comprises photovoltaic panel, storage battery, controller and load, it is characterized in that, described control circuit includes a BOOST booster circuit powered to the load to BUCK reduction voltage circuit and of described charge in batteries by described storage battery by described photovoltaic panel, and described controller makes control circuit switch between BUCK reduction voltage circuit and BOOST booster circuit by switching circuit.
2. the control circuit being applicable to photovoltaic LED lighting system according to claim 1, is characterized in that, described switching circuit comprises metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4.
3. the control circuit being applicable to photovoltaic LED lighting system according to claim 2, is characterized in that, described control circuit also comprises electric capacity C1, electric capacity C2, electric capacity C3, diode D1, inductance L 1 and inspection leakage resistance R1.
4. the control circuit being applicable to photovoltaic LED lighting system according to claim 3, it is characterized in that, the positive pole of described photovoltaic panel is by electric capacity C1 ground connection, the positive pole of described load is by electric capacity C2 ground connection, the positive pole of described storage battery is by electric capacity C3 ground connection, the negative pole of described photovoltaic panel is by metal-oxide-semiconductor Q3 ground connection, the negative pole of described load is by metal-oxide-semiconductor Q4 ground connection, the negative pole of described storage battery is by inspection leakage resistance R1 ground connection, after described metal-oxide-semiconductor Q1 connects with described metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q1 connects the positive pole of photovoltaic panel, metal-oxide-semiconductor Q2 ground connection, the positive pole of described load connects the series connection node of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 by diode D1, the positive pole of described storage battery connects the series connection node of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 by inductance L 1.
5. the control circuit being applicable to photovoltaic LED lighting system according to claim 4, it is characterized in that, when metal-oxide-semiconductor Q3 opens, metal-oxide-semiconductor Q4 closes, when metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 is synchronous complementary PWM operating state, electric capacity C1, electric capacity C3, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, inductance L 1 form BUCK reduction voltage circuit by photovoltaic panel to charge in batteries.
6. the control circuit being applicable to photovoltaic LED lighting system according to claim 4, is characterized in that, detects charging current, adjust the duty ratio of synchronous complementary PWM by inspection leakage resistance R1.
7. the control circuit being applicable to photovoltaic LED lighting system according to claim 4, it is characterized in that, when metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q3 closes, metal-oxide-semiconductor Q4 opens, when metal-oxide-semiconductor Q2 is the work of PWM operating state, electric capacity C3, electric capacity C2, inductance L 1, metal-oxide-semiconductor Q2, diode D1 purchase into BOOST booster circuit, and described storage battery powers to the load.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520400487.2U CN204721669U (en) | 2015-06-11 | 2015-06-11 | A kind of control circuit being applicable to photovoltaic LED lighting system |
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| CN201520400487.2U CN204721669U (en) | 2015-06-11 | 2015-06-11 | A kind of control circuit being applicable to photovoltaic LED lighting system |
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| CN204721669U true CN204721669U (en) | 2015-10-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109121271A (en) * | 2018-08-22 | 2019-01-01 | 江苏优为视界科技有限公司 | One kind being based on MPPT photovoltaic xenon street lamp lighting system |
-
2015
- 2015-06-11 CN CN201520400487.2U patent/CN204721669U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109121271A (en) * | 2018-08-22 | 2019-01-01 | 江苏优为视界科技有限公司 | One kind being based on MPPT photovoltaic xenon street lamp lighting system |
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