CN107147210B - Light-operated type solar power supply circuit - Google Patents
Light-operated type solar power supply circuit Download PDFInfo
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- CN107147210B CN107147210B CN201710500108.0A CN201710500108A CN107147210B CN 107147210 B CN107147210 B CN 107147210B CN 201710500108 A CN201710500108 A CN 201710500108A CN 107147210 B CN107147210 B CN 107147210B
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- triode
- transistor
- power supply
- solar power
- resistor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a light-operated solar power supply circuit, when the light intensity is enough, a control node is electrified, so that a first transistor is conducted, a second transistor is cut off, and a solar power supply end supplies power to a load; if the light intensity is weak, the control node loses power, so that the second transistor is switched on, the first transistor is switched off, and the load is supplied by the mains supply end. Therefore, the solar power supply is utilized to relieve the pressure of the commercial power, and the solar power supply is automatically switched to the commercial power, so that the normal work of the load is ensured when the solar power is insufficient.
Description
Technical Field
The invention relates to the technical field of light energy power supply, in particular to a light-operated solar power supply circuit.
Background
In the current society, people are full of various electric appliances in life, and the demand of people on electric energy is greatly increased day by day. In this case, in order to reduce the load of the utility power, the development of solar energy is called a hot topic.
At present, solar power generation is not connected to a mains supply network, and the dependence of the solar power generation on weather is very strong, so that the solar power generation is difficult to be separated from mains supply independently. Therefore, the electrical appliance connected to the solar power generation state often needs to be connected to the commercial power so as to be switched to the commercial power supply when the illumination is insufficient. At present, the switching between solar energy and commercial power is mostly realized manually, and is not convenient enough.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a light-operated solar power supply circuit.
The invention provides a light-operated solar power supply circuit, which comprises: the transistor comprises a photosensitive element, a control node, a first triode, a second triode, a third triode, a first transistor and a second transistor; the first triode, the second triode and the third triode are all N-type triodes, and the first transistor and the second transistor are all P-channel transistors;
the photosensitive element is connected in series between a working voltage Vcc and a control node, the control node is grounded through a first resistor, the base electrode of the first triode and the base electrode of the third triode are both connected with the control node, and the emitting electrode of the first triode, the emitting electrode of the second triode and the emitting electrode of the third triode are all grounded;
the base electrode of the second triode is connected with the collector electrode of the first triode and is connected with the working voltage Vcc, the grid electrode of the first transistor is connected with the collector electrode of the second triode and is connected with the solar power supply end through a second resistor, and the drain electrode and the source electrode of the first transistor are respectively connected with the solar power supply end and the load;
the grid electrode of the second transistor is connected with the collector electrode of the third triode and is connected with the mains supply end through the third resistor, and the drain electrode and the source electrode of the second transistor are respectively connected with the mains supply end and the load.
Preferably, the photosensitive element is a photodiode, the cathode of which is connected to the operating voltage Vcc and the anode of which is connected to the control node.
Preferably, the base of the second triode is connected with the operating voltage Vcc through a fourth resistor.
Preferably, the control node is grounded after being connected with the first resistor and the fifth resistor in series, and an emitter of the first triode, an emitter of the second triode and an emitter of the third triode are grounded through the fifth resistor.
Preferably, the fifth resistor is a sliding resistor.
In the invention, when the light intensity is enough, the control node is electrified, so that the first transistor is conducted, the second transistor is cut off, and the solar power supply end supplies power to the load; if the light intensity is weak, the control node loses power, so that the second transistor is switched on, the first transistor is switched off, and the load is supplied by the mains supply end. Therefore, the solar power supply is utilized to relieve the pressure of the commercial power, and the solar power supply is automatically switched to the commercial power, so that the normal work of the load is ensured when the solar power is insufficient.
Drawings
Fig. 1 is a structural diagram of a light-operated solar power supply circuit according to the present invention.
Detailed Description
Referring to fig. 1, the present invention provides a light-operated solar power supply circuit, including: the light-sensitive element D1, a control node XA0, a first triode Q1, a second triode Q2, a third triode Q4, a first transistor Q3 and a second transistor Q5. The first triode Q1, the second triode Q2 and the third triode Q4 are all N-type triodes, and the first transistor Q3 and the second transistor Q5 are all P-channel transistors.
The photosensor D1 is connected in series between the operating voltage Vcc and a control node XA0, the control node XA0 being connected to ground through a first resistor R1. The setting of the first resistor R1 may pull the control node XA0 voltage high if the photosensor D1 is turned on.
In this embodiment, the photo sensor D1 is a photodiode, and its cathode is connected to the operating voltage Vcc and its anode is connected to the control node XA 0. When the light intensity reaches the conduction threshold of the photosensitive element D1, the photosensitive element D1 is conducted, and the control node XA0 is electrified; if the light intensity is weak and the on threshold of the photosensitive element D1 is not reached, the photosensitive element D1 is cut off, and the control node loses power.
The base of the first triode Q1 and the base of the third triode Q4 are both connected with a control node XA0, and the emitter of the first triode Q1, the emitter of the second triode Q2 and the emitter of the third triode Q4 are all grounded. Under the condition that the control node XA0 is electrified, the first triode Q1 and the third triode Q4 are conducted; on the contrary, when the control node is powered off, the first triode Q1 and the third triode Q4 are both turned off.
The base of the second triode Q2 is connected to the collector of the first triode Q1 and to the operating voltage Vcc, the gate of the first transistor Q3 is connected to the collector of the second triode Q2 and to the solar power supply terminal Vg through the second resistor R2, and the drain and the source of the first transistor Q3 are connected to the solar power supply terminal Vg and the load, respectively. Under the first triode Q1 conducting state, second triode Q2 base voltage is drawn low by first triode Q1 to second triode Q2 cuts off, thereby first transistor Q3 grid solar energy supply terminal Vg gets electric, thereby first transistor Q3 switches on, and solar energy supply terminal Vg supplies power to the load. On the contrary, when the first transistor Q1 is turned off, the base of the second transistor Q2 gets power from the working voltage, the second transistor Q2 is turned on and pulls down the gate voltage of the first transistor Q3, so that the first transistor Q3 is turned off and cuts off the solar power supply terminal Vg to supply power to the load. The second resistor R2 functions as a voltage divider to prevent the first transistor Q3 from operating under a high voltage environment.
The gate of the second transistor Q5 is connected to the collector of the third transistor Q4 and to the mains supply terminal Vd via a third resistor R3, and the drain and source of the second transistor Q5 are connected to the mains supply terminal Vd and the load, respectively. When the third triode Q4 is turned on, the gate voltage of the second transistor Q5 is pulled low and is cut off, and the power supply line between the commercial power supply end Vd and the load is cut off; when the third transistor Q4 is turned off, the gate of the second transistor Q5 is powered from the mains supply terminal Vd and is turned on, and the mains supply terminal Vd supplies power to the load. The third resistor R3 functions as a voltage divider to prevent the second transistor Q5 from operating in a high voltage environment.
In this embodiment, when the light intensity is sufficient, the control node XA0 is powered on, so as to turn on the first transistor Q3 and turn off the second transistor Q5, and the solar power supply terminal Vg supplies power to the load; if the light intensity is weak, the control node XA0 loses power, so that the second transistor Q5 is turned on and the first transistor Q3 is turned off, and the load is supplied by the mains supply terminal Vd. In this embodiment, the base of the second transistor Q2 is connected to the operating voltage Vcc through the fourth resistor R4, so as to ensure that the second transistor Q2 operates safely in a low-voltage environment.
In this embodiment, the transistor further includes a fifth resistor R5, the control node XA0 is grounded after being connected in series with the first resistor R1 and the fifth resistor R5, and the emitter of the first triode Q1, the emitter of the second triode Q2, and the emitter of the third triode Q4 are all grounded through the fifth resistor R5. In this way, while the voltage difference between the base electrodes and the emitter electrodes of the first triode and the third triode is satisfied through the first resistor, the voltage of the control node XA0 can be increased by adjusting the resistance of the fifth resistor R5, and the working requirements of the first triode Q1 and the second triode Q2 are satisfied. In specific implementation, the fifth resistor R5 may be a sliding resistor, so as to expand the selection range of the saturation voltages of the first transistor Q1 and the third transistor Q4.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A light-operated solar power supply circuit, comprising: a photosensitive element (D1), a control node (XA0), a first triode (Q1), a second triode (Q2), a third triode (Q4), a first transistor (Q3) and a second transistor (Q5); the first triode (Q1), the second triode (Q2) and the third triode (Q4) are all N-type triodes, and the first transistor (Q3) and the second transistor (Q5) are all P-channel transistors;
the photosensitive element (D1) is connected in series between an operating voltage Vcc and a control node (XA0), the control node (XA0) is grounded through a first resistor (R1), the base of the first triode (Q1) and the base of the third triode (Q4) are both connected with a control node (XA0), and the emitter of the first triode (Q1), the emitter of the second triode (Q2) and the emitter of the third triode (Q4) are all grounded;
the base electrode of the second triode (Q2) is connected with the collector electrode of the first triode (Q1) and is connected with the working voltage Vcc, the grid electrode of the first transistor (Q3) is connected with the collector electrode of the second triode (Q2) and is connected with a solar power supply terminal (Vg) through a second resistor (R2), and the drain electrode and the source electrode of the first transistor (Q3) are respectively connected with the solar power supply terminal (Vg) and a load;
the grid electrode of the second transistor (Q5) is connected with the collector electrode of the third triode (Q4) and is connected with the commercial power supply end (Vd) through a third resistor (R3), and the drain electrode and the source electrode of the second transistor (Q5) are respectively connected with the commercial power supply end (Vd) and the load.
2. The light-operated solar power supply circuit as claimed in claim 1, characterized in that the light-sensitive element (D1) is a photodiode, the cathode of which is connected to the operating voltage Vcc and the anode of which is connected to the control node (XA 0).
3. The light-operated solar power supply circuit as claimed in claim 1 or 2, characterized in that the base of the second transistor (Q2) is connected to the operating voltage Vcc via a fourth resistor (R4).
4. The light-operated solar power supply circuit as claimed in claim 1 or 2, further comprising a fifth resistor (R5), wherein the control node (XA0) is connected in series with the first resistor (R1) and the fifth resistor (R5) and then connected to ground, and wherein the emitter of the first transistor (Q1), the emitter of the second transistor (Q2) and the emitter of the third transistor (Q4) are all connected to ground through the fifth resistor (R5).
5. The light-operated solar power supply circuit as claimed in claim 4, characterized in that the fifth resistor (R5) is a sliding resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710500108.0A CN107147210B (en) | 2017-06-27 | 2017-06-27 | Light-operated type solar power supply circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710500108.0A CN107147210B (en) | 2017-06-27 | 2017-06-27 | Light-operated type solar power supply circuit |
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| Publication Number | Publication Date |
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| CN107147210A CN107147210A (en) | 2017-09-08 |
| CN107147210B true CN107147210B (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710500108.0A Active CN107147210B (en) | 2017-06-27 | 2017-06-27 | Light-operated type solar power supply circuit |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU189780U1 (en) * | 2019-01-29 | 2019-06-04 | федеральное государственное бюджетное образовательное учреждение высшего образования "Ставропольский государственный аграрный университет" | Backup Power Device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204290440U (en) * | 2015-01-12 | 2015-04-22 | 国家电网公司 | A kind of multifuctional solar communication equipment charger |
| CN204886405U (en) * | 2015-08-25 | 2015-12-16 | 广州视源电子科技股份有限公司 | Dual-power isolation circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201113502Y (en) * | 2007-08-07 | 2008-09-10 | 丰详实业股份有限公司 | Solar energy power control unit |
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- 2017-06-27 CN CN201710500108.0A patent/CN107147210B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204290440U (en) * | 2015-01-12 | 2015-04-22 | 国家电网公司 | A kind of multifuctional solar communication equipment charger |
| CN204886405U (en) * | 2015-08-25 | 2015-12-16 | 广州视源电子科技股份有限公司 | Dual-power isolation circuit |
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| CN107147210A (en) | 2017-09-08 |
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