CN201750359U - Household photovoltaic dual-closed-loop control inverter - Google Patents
Household photovoltaic dual-closed-loop control inverter Download PDFInfo
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- CN201750359U CN201750359U CN2010202785901U CN201020278590U CN201750359U CN 201750359 U CN201750359 U CN 201750359U CN 2010202785901 U CN2010202785901 U CN 2010202785901U CN 201020278590 U CN201020278590 U CN 201020278590U CN 201750359 U CN201750359 U CN 201750359U
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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
- Y02B10/10—Photovoltaic [PV]
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The utility model relates to a control inverter, in particular to a quasi-sine-wave control inverter for achieving charge and discharge control on a storage battery in a solar-energy household power source system, and meanwhile adopting PWM (pulse width modulation) control chip SG3525 to achieve inversion process and system protection function. The inverter includes an SG3525 inversion control circuit, a singlechip, a voltage detection circuit for the storage battery, a comparator, a charge and discharge controlling circuit, a circuit for detecting the voltages of both the storage battery and a solar-energy battery panel, and a high-current switch tube inverter circuit. The control inverter is designed by adopting P-channel MOS (metal oxide semiconductor) tube positive terminal control method, the circuit design of the inverter is simple, the system ground-sharing is ensured effectively, the reliability of the system is improved and the cost of the system is reduced; and a high-current switch tube IRFZ48N is adopted, the circuit design of the inverter is simple and the long-term and reliable operation of the system is ensured.
Description
Technical field
The utility model relates to a kind of inverter; specifically relating to a kind of domestic solar controls accumulator cell charging and discharging with in the power-supply system; simultaneously, adopt pwm chip SG3525 to realize a kind of family of inversion process and system protection function two closed-loop control inverters of photovoltaic.
Background technology
At present, its charging control loop of the control inverter of main flow is to adopt the negative terminal control mode by the N-channel MOS pipe on the market, promptly realize by the switching tube Q1 (50N06) between PV-and the B-, charging control circuit adopts single-chip microcomputer by gathering solar panel and battery tension, send corresponding pwm signal, charging control switch pipe Q1 is carried out switch control, thereby realize PWM charging control.This control mode circuit design more complicated, most important drawback be when negative pole disconnects solar panel and control circuit not altogether, to the voltage sample of solar panel relatively difficulty, system reliability is low, cost is high.
Inversion partly realizes the inversion process with SG3525, its course of work is for when switch S is pressed, pwm chip SG3525 starts working, SG3525 sends the two-way pwm signal and removes to drive inverse switch pipe Q2 (50N06) and Q3 (50N06), wherein the electric current that passes through among Q2 and the Q3 is very big, so inverse switch pipe Q2 and Q3 adopt, and a plurality of switching tubes are in parallel to be used.Because the parameter of switching tube itself is incomplete same, in switching process, be difficult to guarantee action simultaneously, cause the damage of switching tube easily, in addition when big electric current passes through switching tube in parallel, a road or two-way wherein is easy to damage, cause that at last all switching tubes damage, thereby the reliability of circuit is reduced greatly.
Overload protection and short-circuit protection are to realize by the voltage of gathering on resistance R 1 and the R2; because the resistance of resistance R 1 and R2 is very little; be easy to cause big error; even it is disconnected erroneous judgement to occur; and the electric current on resistance R 1 and the R2 is very big; require the power of R1 and R2 also bigger, the design to circuit board brings many troubles like this.
Summary of the invention
The utility model technology provides a kind of a kind of family of adopting pwm chip SG3525 to realize inversion process and system protection function two closed-loop control inverters of photovoltaic.
The utility model is that a kind of family is achieved by following technical proposals with the two closed-loop control inverters of photovoltaic: a kind of family of the utility model two closed-loop control inverters of photovoltaic, comprise solar panel, storage battery, the SG3525 inverter control circuit, voltage-stabilized power supply circuit, single-chip microcomputer, storage battery and solar panel voltage detecting circuit, the system mode display circuit, comparator, output voltage detecting circuit, output current detection circuit, charging anode control circuit, anti-reverse charge road, high-current switch pipe inverter circuit, described charging anode control circuit is by switching tube Q2, gate series resistance R5, resistance R 22, triode Q3, resistance R 6 constitutes, the gate series resistance R5 of switching tube Q2, be connected with triode Q3 collector electrode with PV+ respectively behind the R22, the drain D end of switching tube Q2 is connected with B+, the source S end of switching tube Q2 links with the negative pole of common cathode diode D5, the grounded emitter of triode Q3, the base series resistor R6 of triode Q3 is connected with 15 pin of single-chip microcomputer; The switching tube Q1 gate series resistance R2 of described high-current switch pipe inverter circuit is connected with 14 pin of SG3525 inverter control circuit, switching tube Q4 gate series resistance R8 is connected with 11 pin of SG3525 inverter control circuit, the drain D end of switching tube Q1 is connected with transformer T two inputs respectively with the drain D end of switching tube Q4, the source S end ground connection of the source S end of switching tube Q1 and switching tube Q4, difference connecting resistance R35 and resistance R 36 between the grid G end of switching tube Q1 and the grid G end of switching tube Q4 and the ground, transformer T input middle-end is connected with power supply B+; In the described current detection circuit, the input of current sensor T1 links with the output of transformer T, another input of current sensor T1 is the ac output end of whole inverter, the output parallel resistance R1 of current sensor T1, resistance R 1 is connected with the bridge rectifier input, resistance R 29 is connected with the bridge rectifier output with resistance R 30 series connection backs, bridge rectifier output negative terminal is connected with capacitor C 2, C3 and C17 negative pole, bridge rectifier output plus terminal and 2 anodal connections of capacitor C.Described SG3525 inverter control circuit is by SG3525 and peripheral cell R12 thereof, R13, R15, R16, R17, R31, R32, R33, C7, C8, C9, C10, C14, C20 forms, be connected with the positive pole of C18 in 3 pin of comparator and the voltage detecting circuit respectively behind the 1 pin series resistance R31 of SG3525,1 pin of SG3525 also respectively with R33, C14 connects, R33,9 pin and the C20 of another termination SG3525 of C14, the other end ground connection of C20, be connected to resistance R 13 between 2 pin of SG3525 and the ground, connecting resistance R12 between 2 pin of SG3525 and 16 pin, 3 pin of SG3525 and 12 pin ground connection, be connected to capacitor C 9 between 5 pin of SG3525 and ground, be connected between 5 pin and 7 pin of SG3525 after potentiometer R17 and resistance R 16 series connection, be connected between 6 pin and ground of SG3525 after resistance R 15 and resistance R 32 series connection, 8 pin of SG3525 connect the positive pole of capacitor C 10, the minus earth of C10,10 pin of SG3525 are received 14 pin of single-chip microcomputer, 11 of SG3525,14 pin are received the R2 of high-current switch pipe inverter circuit respectively, the end of R8, capacitor C 7, receive 13 of SG3525 after the C8 parallel connection, between 15 pin and the ground.
In overload and load short circuits protective circuit, 5 pin of comparator are connected with the output INTO of current detection circuit, 7 pin of comparator are connected with 4 pin of single- chip microcomputer 5,6 pin of comparator are connected with the centre tap of potentiometer R26, the end of potentiometer R26 is connected with power supply+5V, the other end ground connection of potentiometer R26; 3 pin of comparator are connected with the output of output voltage detecting circuit, and 1 pin of comparator is connected with 5 pin of single-chip microcomputer; 2 pin of comparator are connected with the centre tap of potentiometer R28, and the end of potentiometer R28 is connected with power supply+5V, the other end ground connection of potentiometer R28.
There is following beneficial effect at a kind of family of the utility model compared with prior art with the two closed-loop control inverters of photovoltaic:
P channel MOS tube charging anode control method is adopted in the utility model design, and this charging anode Circuit Design is simple, has effectively ensured system altogether, improves the reliability of system, and provides cost savings.
The utility model has adopted high-current switch pipe IRFZ48N to realize inversion, and circuit design is simple, has effectively guaranteed system's operation reliably and with long-term;
Select for use high precision electric current transducer to detect output current in the utility model, detect the accuracy height, reaction speed is fast, can be in the utmost point effective switching off load in the short time, protection system.
The integrated design of the utility model control inverter, power frequency is isolated, and the loaded self-adaptive technology has solved non-resistive load and has started shock problem, and system's control principle is succinct, and product has less trouble and high reliability.
In addition, the utility model adopts the two closed-loop control strategies of current/voltage, and the PWM mode is passed through photovoltaic cell to greatest extent to charge in batteries, the efficient height.
Description of drawings
There is following accompanying drawing at a kind of family of the utility model with the two closed-loop control inverters of photovoltaic:
Fig. 1 is a kind of family of the utility model two closed-loop control inverter theory diagrams of photovoltaic;
Fig. 2 is a kind of family of the utility model two closed-loop control inverter electrical schematic diagrams of photovoltaic.
Wherein: 1, solar panel; 2, storage battery; 3, SG3525 inverter control circuit; 4, voltage-stabilized power supply circuit; 5, single-chip microcomputer; 6, storage battery and solar panel voltage detecting circuit; 7, system mode display circuit; 8, comparator; 9, output voltage detecting circuit; 10, output current detection circuit; 11, charging anode control circuit; 12, Recoil preventive circuit; 13, high-current switch pipe inverter circuit.
Embodiment
Below in conjunction with drawings and Examples a kind of family of the utility model is further described with the two closed-loop control inverter technology schemes of photovoltaic.
As Fig. 1-shown in Figure 2, a kind of family of the utility model comprises solar panel 1 with the two closed-loop control inverters of photovoltaic, storage battery 2, SG3525 inverter control circuit 3, voltage-stabilized power supply circuit 4, single-chip microcomputer 5, storage battery and solar panel voltage detecting circuit 6, system mode display circuit 7, comparator 8, output voltage detecting circuit 9, output current detection circuit 10, charging anode control circuit 11, anti-reverse charge road 12, high-current switch pipe inverter circuit 13, described charging anode control circuit 11 is by switching tube Q2, gate series resistance R5, resistance R 22, triode Q3, resistance R 6 is formed, the gate series resistance R5 of switching tube Q2, be connected with triode Q3 collector electrode with PV+ respectively behind the R22, the drain D end of switching tube Q2 is connected with B+, the source S end of switching tube Q2 links with the negative pole of common cathode diode D5, the grounded emitter of triode Q3, the base series resistor R6 of triode Q3 is connected with 15 pin of single-chip microcomputer 5; The switching tube Q1 gate series resistance R2 of described high-current switch pipe inverter circuit 13 is connected with 14 pin of SG3525 inverter control circuit 3, switching tube Q4 gate series resistance R8 is connected with 11 pin of SG3525 inverter control circuit 3, the drain D end of switching tube Q1 is connected with transformer T two inputs respectively with the drain D end of switching tube Q4, the source S end ground connection of the source S end of switching tube Q1 and switching tube Q4, difference connecting resistance R35 and resistance R 36 between the grid G end of switching tube Q1 and the grid G end of switching tube Q4 and the ground, transformer T input middle-end is connected with power supply B+; In the described current detection circuit 10, the input of current sensor T1 links with the output of transformer T, another input of current sensor T1 is the ac output end of whole inverter, the output parallel resistance R1 of current sensor T1, resistance R 1 is connected with the bridge rectifier input, resistance R 29 is connected with the bridge rectifier output with resistance R 30 series connection backs, bridge rectifier output negative terminal is connected with capacitor C 2, C3 and C17 negative pole, bridge rectifier output plus terminal and 2 anodal connections of capacitor C.Described SG3525 inverter control circuit 3 is by SG3525 and peripheral cell R12 thereof, R13, R15, R16, R17, R31, R32, R33, C7, C8, C9, C10, C14, C20 forms, be connected with the positive pole of C18 in 3 pin of comparator 8 and the voltage detecting circuit respectively behind the 1 pin series resistance R31 of SG3525,1 pin of SG3525 also respectively with R33, C14 connects, R33,9 pin and the C20 of another termination SG3525 of C14, the other end ground connection of C20, be connected to resistance R 13 between 2 pin of SG3525 and the ground, connecting resistance R12 between 2 pin of SG3525 and 16 pin, 3 pin of SG3525 and 12 pin ground connection, be connected to capacitor C 9 between 5 pin of SG3525 and ground, be connected between 5 pin and 7 pin of SG3525 after potentiometer R17 and resistance R 16 series connection, be connected between 6 pin and ground of SG3525 after resistance R 15 and resistance R 32 series connection, 8 pin of SG3525 connect the positive pole of capacitor C 10, the minus earth of C10,10 pin of SG3525 are received 14 pin of single- chip microcomputer 5,11 of SG3525,14 pin are received the R2 of high-current switch pipe inverter circuit 13 respectively, the end of R8, capacitor C 7, receive 13 of SG3525 after the C8 parallel connection, between 15 pin and the ground.
In overload and load short circuits protective circuit, 5 pin of comparator 8 are connected with the output INTO of current detection circuit 10,7 pin of comparator 8 are connected with 4 pin of single- chip microcomputer 5,6 pin of comparator 8 are connected with the centre tap of potentiometer R26, the end of potentiometer R26 is connected with power supply+5V, the other end ground connection of potentiometer R26; 3 pin of comparator 8 are connected with the output of output voltage detecting circuit 9, and 1 pin of comparator 8 is connected with 5 pin of single-chip microcomputer 5; 2 pin of comparator 8 are connected with the centre tap of potentiometer R28, and the end of potentiometer R28 is connected with power supply+5V, the other end ground connection of potentiometer R28.
The transformer T output voltage sampling end of described output voltage detecting circuit 9 is connected with the input of bridge rectifier, resistance R 10 is connected with the bridge rectifier output with resistance R 11 series connection backs, the bridge rectifier negative terminal is connected with the negative pole of capacitor C 13, C18 and C19, and the positive pole of bridge rectifier connects and is connected with the positive pole of capacitor C 13.
The negative pole of the common cathode diode D5 on described anti-reverse charge road 12 is connected with the source S of Q2 in the charging control circuit 11, and the positive pole of common cathode diode D5 is connected with the PV+ of solar panel 1; In described storage battery and the cell plate voltage testing circuit 6, the voltage PV+ of solar panel 1 is connected with 24 pin of single-chip microcomputer 5 by after resistance R 4 and the potentiometer R3 dividing potential drop.The voltage B+ of storage battery 2 is connected with 23 pin of single-chip microcomputer 5 by after resistance R 7 and the potentiometer R9 dividing potential drop;
In described storage battery and the solar panel voltage detecting circuit 6, the voltage PV+ of solar panel 1 is connected with 24 pin of single-chip microcomputer by after resistance R 4 and the potentiometer R3 dividing potential drop; The voltage B+ of storage battery 2 finishes the detection to the voltage of solar panel 1 and storage battery 2 by linking with 23 pin of single-chip microcomputer after resistance R 7 and the potentiometer R9 dividing potential drop.
The input of described voltage-stabilized power supply circuit 4 is connected with power supply B+, output output+5V power supply.
The utility model adopts P channel MOS tube anode control method, as Fig. 1, shown in Figure 2, described a kind of family comprises solar panel 1 with the two closed-loop control inverters of photovoltaic, storage battery 2, SG3525 inverter control circuit 3, voltage-stabilized power supply circuit 4, single-chip microcomputer 5, storage battery and solar panel voltage detecting circuit 6, system mode display circuit 7, comparator 8, output voltage detecting circuit 9, output current detection circuit 10, charging anode control circuit 11, anti-reverse charge road 12, high-current switch pipe inverter circuit 13, described charging anode control circuit 11 is by switching tube Q2, gate series resistance R5, resistance R 22, triode Q3, resistance R 6 constitutes, the gate series resistance R5 of switching tube Q2, be connected with triode Q3 collector electrode with PV+ respectively behind the R22, the drain D end of switching tube Q2 is connected with B+, the source S end of switching tube Q2 links with the negative pole of common cathode diode D5, the grounded emitter of triode Q3, the base series resistor R6 of triode Q3 is connected with 15 pin of single-chip microcomputer 5; The switching tube Q1 gate series resistance R2 of described high-current switch pipe inverter circuit 13 is connected with 14 pin of SG3525 inverter control circuit 3, switching tube Q4 gate series resistance R8 is connected with 11 pin of SG3525 inverter control circuit 3, the drain D end of switching tube Q1 is connected with transformer T two inputs respectively with the drain D end of switching tube Q4, the source S end ground connection of the source S end of switching tube Q1 and switching tube Q4, difference connecting resistance R35 and resistance R 36 between the grid G end of switching tube Q1 and the grid G end of switching tube Q4 and the ground, transformer T input middle-end is connected with power supply B+; In the described current detection circuit 10, the input of current sensor T1 links with the output of transformer T, another input of current sensor T1 is the ac output end of whole inverter, the output parallel resistance R1 of current sensor T1, resistance R 1 is connected with the bridge rectifier input, resistance R 29 is connected with the bridge rectifier output with resistance R 30 series connection backs, bridge rectifier output negative terminal is connected with capacitor C 2, C3 and C17 negative pole, bridge rectifier output plus terminal and 2 anodal connections of capacitor C; Described SG3525 inverter control circuit 3 is by SG3525 and peripheral cell R12 thereof, R13, R15, R16, R17, R31, R32, R33, C7, C8, C9, C10, C14, C20 forms, be connected with the positive pole of C18 in 3 pin of comparator 8 and the voltage detecting circuit respectively behind the 1 pin series resistance R31 of SG3525,1 pin of SG3525 also respectively with R33, C14 connects, R33,9 pin and the C20 of another termination SG3525 of C14, the other end ground connection of C20, be connected to resistance R 13 between 2 pin of SG3525 and the ground, connecting resistance R12 between 2 pin of SG3525 and 16 pin, 3 pin of SG3525 and 12 pin ground connection, be connected to capacitor C 9 between 5 pin of SG3525 and ground, be connected between 5 pin and 7 pin of SG3525 after potentiometer R17 and resistance R 16 series connection, be connected between 6 pin and ground of SG3525 after resistance R 15 and resistance R 32 series connection, 8 pin of SG3525 connect the positive pole of capacitor C 10, the minus earth of C10,10 pin of SG3525 are received 14 pin of single- chip microcomputer 5,11 of SG3525,14 pin are received the R2 of high-current switch pipe inverter circuit 13 respectively, the end of R8, capacitor C 7, receive 13 of SG3525 after the C8 parallel connection, between 15 pin and the ground.
In overload and load short circuits protective circuit, 5 pin of comparator 8 are connected with the output INTO of current detection circuit 10,7 pin of comparator 8 are connected with 4 pin of single- chip microcomputer 5,6 pin of comparator 8 are connected with the centre tap of potentiometer R26, the end of potentiometer R26 is connected with power supply+5V, the other end ground connection of potentiometer R26; 3 pin of comparator 8 are connected with the output of output voltage detecting circuit 9, and 1 pin of comparator 8 is connected with 5 pin of single-chip microcomputer 5; 2 pin of comparator 8 are connected with the centre tap of potentiometer R28, and the end of potentiometer R28 is connected with power supply+5V, the other end ground connection of potentiometer R28.
The transformer T output voltage sampling end of described output voltage detecting circuit 9 is connected with the input of bridge rectifier, resistance R 10 is connected with the bridge rectifier output with resistance R 11 series connection backs, the bridge rectifier negative terminal is connected with the negative pole of capacitor C 13, C18 and C19, and the positive pole of bridge rectifier connects and is connected with the positive pole of capacitor C 13.
The input PV+ on anti-reverse charge road 12 is connected with the positive pole of common cathode diode D5, and the negative pole of common cathode diode D5 is connected with the source S end of switching tube Q2, and the gate pole series resistance R5 of switching tube Q2 is connected with PV+; The gate series resistance R22 of described charging control circuit 11 switching tube Q2 is connected with triode Q3 collector electrode, the grounded emitter of triode Q3, the base series resistor R6 of triode Q3 is connected with 15 pin of single-chip microcomputer 5, and the drain D end of switching tube Q2 is connected with the B+ of storage battery 2.
In described storage battery and the solar panel voltage detecting circuit 6, the voltage PV+ of solar panel 1 is connected with 24 pin of single-chip microcomputer by after resistance R 4 and the potentiometer R3 dividing potential drop; The voltage B+ of storage battery 2 finishes the detection to the voltage of solar panel 1 and storage battery 2 by linking with 23 pin of single-chip microcomputer after resistance R 7 and the potentiometer R9 dividing potential drop.
The input of described voltage-stabilized power supply circuit 4 is connected with power supply B+, input output+5V power supply.Adopted high-current switch pipe IRFZ48N in the utility model, circuit design is simple, has effectively guaranteed system's operation reliably and with long-term; Shown in the high-current switch pipe inverter circuit 13 of Fig. 2.
Select for use high precision electric current transducer T1 to detect overload and short-circuit protection in the utility model, detect the accuracy height, reaction speed is fast, can effectively turn-off output, protection system in the short time at the utmost point.Shown in output current detection circuit 10, output voltage detecting circuit 9, SG3525 inverter control circuit 3 and the comparator 8 of Fig. 2.
A kind of family of the utility model is provided with battery tension with the two closed-loop control inverters of photovoltaic and detects indicating circuit 6 and system mode display circuit 7, as shown in Figure 2.
Claims (4)
1. a family is with the two closed-loop control inverters of photovoltaic, comprise solar panel (1), storage battery (2), SG3525 inverter control circuit (3), voltage-stabilized power supply circuit (4), single-chip microcomputer (5), storage battery and solar panel voltage detecting circuit (6), system mode display circuit (7), comparator (8), output voltage detecting circuit (9), output current detection circuit (10), charging anode control circuit (11), anti-reverse charge road (12), high-current switch pipe inverter circuit (13), it is characterized in that: described charging anode control circuit (11) is by switching tube Q2, gate series resistance R5, resistance R 22, triode Q3, resistance R 6 constitutes, the gate series resistance R5 of switching tube Q2, be connected with triode Q3 collector electrode with PV+ respectively behind the R22, the drain D end of switching tube Q2 is connected with B+, the source S end of switching tube Q2 links with the negative pole of common cathode diode D5, the grounded emitter of triode Q3, the base series resistor R6 of triode Q3 is connected with 15 pin of single-chip microcomputer (5); The switching tube Q1 gate series resistance R2 of described high-current switch pipe inverter circuit (13) is connected with 14 pin of SG3525 inverter control circuit (3), switching tube Q4 gate series resistance R8 is connected with 11 pin of SG3525 inverter control circuit (3), the drain D end of switching tube Q1 is connected with transformer T two inputs respectively with the drain D end of switching tube Q4, the source S end ground connection of the source S end of switching tube Q1 and switching tube Q4, difference connecting resistance R35 and resistance R 36 between the grid G end of switching tube Q1 and the grid G end of switching tube Q4 and the ground, transformer T input middle-end is connected with power supply B+; In the described current detection circuit (10), the input of current sensor T1 links with the output of transformer T, another input of current sensor T1 is the ac output end of whole inverter, the output parallel resistance R1 of current sensor T1, resistance R 1 is connected with the bridge rectifier input, resistance R 29 is connected with the bridge rectifier output with resistance R 30 series connection backs, bridge rectifier output negative terminal is connected with capacitor C 2, C3 and C17 negative pole, bridge rectifier output plus terminal and 2 anodal connections of capacitor C.Described SG3525 inverter control circuit (3) is by SG3525 and peripheral cell R12 thereof, R13, R15, R16, R17, R31, R32, R33, C7, C8, C9, C10, C14, C20 forms, be connected with the positive pole of C18 in 3 pin of comparator (8) and the voltage detecting circuit respectively behind the 1 pin series resistance R31 of SG3525,1 pin of SG3525 also respectively with R33, C14 connects, R33,9 pin and the C20 of another termination SG3525 of C14, the other end ground connection of C20, be connected to resistance R 13 between 2 pin of SG3525 and the ground, connecting resistance R12 between 2 pin of SG3525 and 16 pin, 3 pin of SG3525 and 12 pin ground connection, be connected to capacitor C 9 between 5 pin of SG3525 and ground, be connected between 5 pin and 7 pin of SG3525 after potentiometer R17 and resistance R 16 series connection, be connected between 6 pin and ground of SG3525 after resistance R 15 and resistance R 32 series connection, 8 pin of SG3525 connect the positive pole of capacitor C 10, the minus earth of C10,10 pin of SG3525 are received 14 pin of single-chip microcomputer (5), 11 of SG3525,14 pin are received the R2 of high-current switch pipe inverter circuit (13) respectively, the end of R8, capacitor C 7, receive 13 of SG3525 after the C8 parallel connection, between 15 pin and the ground; In overload and the load short circuits protective circuit, 5 pin of comparator (8) are connected with the output INTO of current detection circuit (10), 7 pin of comparator (8) are connected with 4 pin of single-chip microcomputer (5), 6 pin of comparator (8) are connected with the centre tap of potentiometer R26, the end of potentiometer R26 is connected with power supply+5V, the other end ground connection of potentiometer R26; 3 pin of comparator (8) are connected with the output of output voltage detecting circuit (9), and 1 pin of comparator (8) is connected with 5 pin of single-chip microcomputer (5); 2 pin of comparator (8) are connected with the centre tap of potentiometer R28, and the end of potentiometer R28 is connected with power supply+5V, the other end ground connection of potentiometer R28.
2. a kind of family according to claim 1 two closed-loop control inverters of photovoltaic, it is characterized in that: the transformer T output voltage sampling end of described voltage detecting circuit (9) is connected with the input of bridge rectifier, resistance R 10 is connected with the bridge rectifier output with resistance R 11 series connection backs, the bridge rectifier negative terminal is connected with the negative pole of capacitor C 13, C18 and C19, and the positive pole of bridge rectifier connects and is connected with the positive pole of capacitor C 13.
3. a kind of family according to claim 1 two closed-loop control inverters of photovoltaic, it is characterized in that: the negative pole of the common cathode diode D5 on described anti-reverse charge road (12) is connected with the source S of Q2 in the charging control circuit (11), and the positive pole of common cathode diode D5 is connected with the PV+ of solar panel (1); In described storage battery and the cell plate voltage testing circuit (6), the voltage PV+ of solar panel (1) is connected with 24 pin of single-chip microcomputer (5) by after resistance R 4 and the potentiometer R3 dividing potential drop, and the voltage B+ of storage battery (2) passes through to be connected with 23 pin of single-chip microcomputer (5) after resistance R 7 and the potentiometer R9 dividing potential drop.
4. a kind of family according to claim 1 two closed-loop control inverters of photovoltaic, it is characterized in that: the input of described voltage-stabilized power supply circuit (4) is connected with power supply B+, output output+5V power supply.
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| CN2010202785901U CN201750359U (en) | 2010-07-28 | 2010-07-28 | Household photovoltaic dual-closed-loop control inverter |
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| CN2010202785901U CN201750359U (en) | 2010-07-28 | 2010-07-28 | Household photovoltaic dual-closed-loop control inverter |
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| CN103941699A (en) * | 2014-04-28 | 2014-07-23 | 浙江艾罗电源有限公司 | Inverter for energy-storage type photovoltaic grid-connected system |
| CN104821620A (en) * | 2015-04-23 | 2015-08-05 | 中科恒源科技股份有限公司 | Photovoltaic charging control system and control method |
| CN105744674A (en) * | 2016-02-29 | 2016-07-06 | 湖北工业大学 | Regional network-connected intelligent solar compensation streetlamp system and control system thereof |
| CN107086602A (en) * | 2017-05-25 | 2017-08-22 | 河南迎基太阳能科技有限公司 | A kind of solar charging/discharging manages grid-connected system |
| CN109104109A (en) * | 2018-09-07 | 2018-12-28 | 曾金玉 | A kind of high efficiency inversion transformation technique protection circuit |
| CN109412214A (en) * | 2017-08-16 | 2019-03-01 | 凌飞 | A kind of pulse reparation speed fills device |
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2010
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| CN103941699A (en) * | 2014-04-28 | 2014-07-23 | 浙江艾罗电源有限公司 | Inverter for energy-storage type photovoltaic grid-connected system |
| CN103941699B (en) * | 2014-04-28 | 2016-06-08 | 浙江艾罗电源有限公司 | Inverter for accumulation energy type photovoltaic parallel in system |
| CN104821620A (en) * | 2015-04-23 | 2015-08-05 | 中科恒源科技股份有限公司 | Photovoltaic charging control system and control method |
| CN104821620B (en) * | 2015-04-23 | 2017-03-08 | 中科恒源科技股份有限公司 | A kind of photovoltaic charged control system and control method |
| CN105744674A (en) * | 2016-02-29 | 2016-07-06 | 湖北工业大学 | Regional network-connected intelligent solar compensation streetlamp system and control system thereof |
| CN105744674B (en) * | 2016-02-29 | 2017-07-07 | 湖北工业大学 | Area networking formula solar energy intelligent compensation road lamp system and its control method |
| CN107086602A (en) * | 2017-05-25 | 2017-08-22 | 河南迎基太阳能科技有限公司 | A kind of solar charging/discharging manages grid-connected system |
| CN107086602B (en) * | 2017-05-25 | 2023-05-02 | 沈阳清能院清洁能源有限公司 | Solar charge-discharge management grid-connected system |
| CN109412214A (en) * | 2017-08-16 | 2019-03-01 | 凌飞 | A kind of pulse reparation speed fills device |
| CN109104109A (en) * | 2018-09-07 | 2018-12-28 | 曾金玉 | A kind of high efficiency inversion transformation technique protection circuit |
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