CN216649544U - Photovoltaic off-grid power generation circuit and device - Google Patents

Photovoltaic off-grid power generation circuit and device Download PDF

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Publication number
CN216649544U
CN216649544U CN202121905837.2U CN202121905837U CN216649544U CN 216649544 U CN216649544 U CN 216649544U CN 202121905837 U CN202121905837 U CN 202121905837U CN 216649544 U CN216649544 U CN 216649544U
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module
transistor
power
output
bypass
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黄光强
丁平
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Shenzhen Sacolar New Energy Co ltd
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Shenzhen Sacolar New Energy Co ltd
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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
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

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Abstract

The utility model relates to the technical field of photovoltaic power generation, in particular to a photovoltaic off-grid power generation circuit and device. It includes: the device comprises a commercial power activation module, an auxiliary power module, a control module, a bidirectional conversion main power module, a bypass module and an output module. When no battery exists, the bypass module works normally, the commercial power activation module provides power for the auxiliary power supply module, the control module starts after the auxiliary power supply works normally, and the bypass module supplies power to the load in the battery-free mode. When the lithium battery is connected, the bypass module can also activate the dormant battery through the bidirectional conversion power module. The power generation circuit of the embodiment not only improves the loading capacity of the photovoltaic power generation system, but also can be switched according to the power utilization requirement so as to meet the power utilization requirement of multiple regions.

Description

Photovoltaic off-grid power generation circuit and device
Technical Field
The utility model relates to the technical field of photovoltaic power generation, in particular to a photovoltaic off-grid power generation circuit and device.
Background
Along with the advocation of green energy in recent years, photovoltaic power generation technology is also becoming more mature day by day, and the photovoltaic power generation system load capacity among the prior art is weak, and can't satisfy the power consumption demand in many areas.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects in the prior art, the utility model provides a photovoltaic off-grid power generation circuit, which aims to increase the loading capacity of a photovoltaic power generation system and meet the power utilization requirements of multiple regions.
A photovoltaic off-grid power generation circuit comprising: the device comprises a mains supply activation module, an auxiliary power supply module, a control module, a bidirectional conversion main power module, a bypass module and an output module;
the input end of the commercial power activation module is connected with commercial power, the output end of the commercial power activation module is connected with the auxiliary power module, the control module and the bypass module, and the commercial power activation module is used for activating commercial power to charge the auxiliary power module and supply power to a load;
the control module is connected with the auxiliary power supply module, the bypass module and the output module and is used for controlling the modules to work coordinately;
the bypass module is connected with the output module and used for supplying power to a load in a battery-free mode;
the bidirectional conversion main power module is connected with the control module and the output module, and when the auxiliary power module works, the bypass module is used for activating the auxiliary power module through the bidirectional conversion main power module to supply power to a load;
the output module is used for processing the electric signals output by the commercial power or the auxiliary power supply module and then supplying the processed electric signals to the load.
In one example, the utility power activation module includes a rectifier bridge BR1, a transformer TX1, a diode D1, a MOS transistor Q2, a resistor R2, and a first power driving chip U1;
the input end of the rectifier bridge BR1 is connected with a mains supply, and the output end of the rectifier bridge BR1 is connected with the primary side of the transformer TX 1; the secondary side of the transformer TX1 is connected with the auxiliary power supply module; the source of the diode D1 is connected with the output end of the rectifier bridge BR1, and the drain of the diode D1 is grounded through the resistor R2; the gate of the diode D1 is connected to the first power driver chip U1.
In one example, the auxiliary power supply module includes a resistor R1, a transistor Q1, a transistor Q3, a transistor Q4, a transformer TX2, a diode D2, a MOS transistor Q5, a resistor R4, a resistor R3, a transistor Q1, and a second power supply driving chip U2;
an emitting electrode of the MOS tube Q3 is connected with an output end of a commercial power activation module, a collector electrode of the MOS tube Q3 is connected with the second power supply driving chip U2, a base electrode of the MOS tube Q3 is connected with a collector electrode of the triode Q4, an emitting electrode of the triode Q4 is grounded, and the base electrode of the triode Q4 is connected with the resistor R3 in series;
a compensation pin of the second power supply driving chip U2 is connected with a collector of a triode Q1, an emitter of a triode Q1 is grounded, and a base of a triode Q1 is connected with a resistor R1 in series;
the grid electrode of the MOS tube Q5 is connected with the control pin of the second power supply driving chip U2, the source electrode of the MOS tube Q5 is connected with the primary side of the transformer TX2, and the drain electrode of the MOS tube Q5 is grounded; one end of the secondary side of the transformer TX2 is grounded, and the other end outputs a supply voltage.
In one example, the bypass module includes switch RY1, switch RY2, switch RY3, and current sensor CT 1;
the output line L and the output line N of the mains supply activation module are connected with the output module after passing through the switch RY1 and the switch RY2 respectively; the L line of the output of the commercial power activation module is also provided with the current sensor CT1 and a switch RY3, and the current sensor CT1 is used for detecting the output current value.
In one example, the output module includes a switch RY4, a switch RY5, a first load AC1, a second load AC 2;
the L line of the output of the bypass module is connected with one end of a first load AC1 through the switch RY4, and the other end of the first load AC1 is connected with the N line of the output of the bypass module; the L line of the output of the bypass module is also connected with one end of a second load AC2, and the other end of the second load AC2 is connected with the N line of the output of the bypass module; the N line of the bypass module output is also connected to ground through the switch RY 5.
In one example, the bidirectional conversion main power module comprises a power frequency transformer TX2, a current sensor CT2, a capacitor C2, a capacitor C3, a transistor Q6, a transistor Q7, a transistor Q8, a transistor Q9, a transistor Q10, a battery BAT, and an inductor L1;
the L line output by the bypass module is connected with one end of the primary side of the power frequency transformer TX2 through the current sensor CT2, and the other end of the primary side of the power frequency transformer TX2 is connected with the N line output by the bypass module; one end of the secondary side of the power frequency transformer TX2 is connected with the source of the transistor Q9, the drain of the transistor Q9 is connected with one end of the inductor L1, the other end of the inductor L1 is connected with the source of the transistor Q7, and the drain of the transistor Q7 is connected with the output end PV +; the other end of the secondary side of the power frequency transformer TX2 is connected with the drain electrode of a transistor Q8, and the source electrode of a transistor Q8 is connected with an output end PV-; the source of the transistor Q10 is connected to the source of the transistor Q8, and the drain of the transistor Q10 is connected to the source of the transistor Q9; the source of the transistor Q7 is connected with the other end of the secondary side of the power frequency transformer TX2, and the drain of the transistor Q7 is connected with one end of the inductor L1 and one end of the inductor L1;
one end of the capacitor C2 is connected with the drain electrode of the transistor Q7, and the other end is connected with the source electrode of the transistor Q8; the positive electrode of the battery BAT is connected with the drain electrode of the transistor Q7, and the negative electrode of the battery BAT is connected with the source electrode of the transistor Q8;
the capacitor C3 is connected in parallel at two ends of the primary side of the power frequency transformer TX 2;
the gates of the transistor Q6, the transistor Q7, the transistor Q8, the transistor Q9 and the transistor Q10 are all connected with a control module, and the control module is used for controlling the on and off of the transistor Q6, the transistor Q7, the transistor Q8, the transistor Q9 and the transistor Q10.
In one example, a diode D3 is further included, and the diode D3 is connected in parallel across the battery BAT.
A photovoltaic off-grid power generation device comprises the photovoltaic off-grid power generation circuit.
The photovoltaic off-grid power generation circuit according to the above embodiment includes: the device comprises a commercial power activation module, an auxiliary power supply module, a control module, a bidirectional conversion main power module, a bypass module and an output module. The input end of the commercial power activation module is connected with commercial power, the output end of the commercial power activation module is connected with the auxiliary power module, the control module and the bypass module, and the commercial power activation module is used for activating the commercial power to charge the auxiliary power module and supply power to a load; the control module is connected with the auxiliary power supply module, the bypass module and the output module and is used for controlling the modules to work coordinately; the bypass module is connected with the output module and used for supplying power to a load in a battery-free mode; the bidirectional conversion main power module is connected with the control module and the output module, and when the auxiliary power module works, the bypass module is used for activating the auxiliary power module through the bidirectional conversion main power module to supply power to a load; the output module is used for processing the electric signals output by the commercial power or the auxiliary power supply module and then supplying the processed electric signals to the load. When no battery exists, the bypass module works normally, the commercial power activation module provides power for the auxiliary power supply module, the control module starts after the auxiliary power supply works normally, and the bypass module supplies power to the load in the battery-free mode. When the lithium battery is connected, the bypass module can also activate the dormant battery through the bidirectional conversion power module. The power generation circuit of the embodiment not only improves the loading capacity of the photovoltaic power generation system, but also can be switched according to the power utilization requirement so as to meet the power utilization requirement of multiple regions.
Drawings
FIG. 1 is a general schematic diagram of a photovoltaic off-grid power generation circuit according to an embodiment of the present application;
fig. 2 is a schematic circuit diagram of a commercial power activation module according to an embodiment of the present application;
FIG. 3 is a schematic circuit diagram of an auxiliary power module according to an embodiment of the present disclosure;
fig. 4 is a circuit diagram of a bypass module, a bidirectional conversion main power module, and an output module according to an embodiment of the present disclosure.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning.
The first embodiment is as follows:
the present embodiment provides a photovoltaic off-grid power generation circuit, as shown in fig. 1, which includes: the device comprises a commercial power activation module 1, an auxiliary power supply module 2, a control module 3, a bidirectional conversion main power module 5, a bypass module 4 and an output module 6.
The input end of the commercial power activation module 1 is connected with commercial power, the output end of the commercial power activation module is connected with the auxiliary power module 2, the control module 3 and the bypass module 6, and the commercial power activation module 1 is used for activating the commercial power to charge the auxiliary power module 2 and supply power to a load. The control module 3 is connected with the auxiliary power supply module 2, the bypass module 4 and the output module 6, and the control module 3 is used for controlling the modules to work coordinately. The bypass module 4 is connected to the output module 6, the bypass module 4 being adapted to supply power to the load in the batteryless mode. The bidirectional conversion main power module 5 is connected with the control module 3 and the output module, and when the auxiliary power module 2 works, the bypass module 4 is used for activating the auxiliary power module 2 through the bidirectional conversion main power module 5 to supply power for a load. The output module 6 is used for processing the electric signal output by the commercial power or the auxiliary power supply module and then supplying the processed electric signal to a load. When no battery exists, the bypass module 4 works normally, the commercial power activation module 1 supplies power to the auxiliary power supply module 2, the control module 3 is started after the auxiliary power supply works normally, and the bypass module 4 supplies power to a load in a battery-free mode. When receiving the lithium battery, the bypass module 4 can also activate the dormant lithium battery through the bidirectional conversion power module 5. The output module 6 has two functions, one of which has a secondary power-off function, so that the loading capacity of the machine can be increased, and the other has an output N line and ground wire switching function, so that the power utilization requirements of more regions are met.
As shown in fig. 2, the utility power activation module 1 of this embodiment includes a rectifier bridge BR1, a transformer TX1, a diode D1, a MOS transistor Q2, a resistor R2, and a first power driving chip U1; the input end of the rectifier bridge BR1 is connected with the mains supply, and the output end of the rectifier bridge BR1 is connected with the primary side of a transformer TX 1; the secondary side of the transformer TX1 is connected with the auxiliary power supply module; the source of the diode D1 is connected to the output terminal of the rectifier bridge BR1, and the drain of the diode D1 is grounded through the resistor R2; the gate of the diode D1 is connected to the first power driver chip U1. When the bypass module 4 normally inputs power, the mains supply (GRID) inputs and rectifies the power into direct current to supply power to the Q2 and the TX1, meanwhile, the power supply voltage is provided for the driving chip, and the mains supply activation module 1 outputs SPS voltage after working to supply power to the auxiliary power supply module 2. At the same time, bypass module 4 will close relays RY1 and RY2 and the output module will supply power to the load.
As shown in fig. 3, the auxiliary power module 2 includes a resistor R1, a transistor Q1, a transistor Q3, a transistor Q4, a transformer TX2, a diode D2, a MOS transistor Q5, a resistor R4, a resistor R3, a transistor Q1, and a second power driving chip U2. An emitting electrode of the MOS tube Q3 is connected with an output end of the commercial power activation module, a collector electrode of the MOS tube Q3 is connected with the second power supply driving chip U2, a base electrode of the MOS tube Q3 is connected with a collector electrode of the triode Q4, an emitting electrode of the triode Q4 is grounded, and a resistor R3 is connected to the base electrode of the triode Q4 in series; the compensation pin of the second power supply driving chip U2 is connected with the collector of the triode Q1, the emitter of the triode Q1 is grounded, and the base of the triode Q1 is connected in series with a resistor R1. The grid electrode of the MOS tube Q5 is connected with the control pin of the second power supply driving chip U2, the source electrode of the MOS tube Q5 is connected with the primary side of the transformer TX2, and the drain electrode of the MOS tube Q5 is grounded; one end of the secondary side of the transformer TX2 is grounded, and the other end outputs a supply voltage.
As shown in fig. 4, the bypass module 4 includes a switch RY1, a switch RY2, a switch RY3, and a current sensor CT 1; the output line L and the output line N of the mains supply activation module are connected with the output module through a switch RY1 and a switch RY2 respectively; the L line of the output 1 of the commercial power activation module is also provided with a current sensor CT1 and a switch RY3, and the current sensor CT1 is used for detecting the current value of the output.
The output module 6 of the present embodiment includes a switch RY4, a switch RY5, a first load AC1, and a second load AC 2. The L line output by the bypass module is connected with one end of a first load AC1 through a switch RY4, and the other end of the first load AC1 is connected with the N line output by the bypass module; the L line of the output of the bypass module 4 is also connected with one end of a second load AC2, and the other end of the second load AC2 is connected with the N line of the output of the bypass module 4; the N line of the bypass module 4 output is also connected to ground through switch RY 5.
The bidirectional conversion main power module 5 comprises a power frequency transformer TX2, a current sensor CT2, a capacitor C2, a capacitor C3, a transistor Q6, a transistor Q7, a transistor Q8, a transistor Q9, a transistor Q10, a battery BAT and an inductor L1. An L line output by the bypass module 4 is connected with one end of the primary side of the power frequency transformer TX2 through a current sensor CT2, and the other end of the primary side of the power frequency transformer TX2 is connected with an N line output by the bypass module; one end of the secondary side of the power frequency transformer TX2 is connected with the source of the transistor Q9, the drain of the transistor Q9 is connected with one end of the inductor L1, the other end of the inductor L1 is connected with the source of the transistor Q7, and the drain of the transistor Q7 is connected with the output end PV +; the other end of the secondary side of the power frequency transformer TX2 is connected with the drain electrode of a transistor Q8, and the source electrode of a transistor Q8 is connected with an output end PV-; the source of the transistor Q10 is connected to the source of the transistor Q8, and the drain of the transistor Q10 is connected to the source of the transistor Q9; the source of the transistor Q7 is connected to the other end of the secondary side of the power frequency transformer TX2, and the drain of the transistor Q7 is connected to one end of the inductor L1 and one end of the inductor L1. One end of the capacitor C2 is connected with the drain electrode of the transistor Q7, and the other end is connected with the source electrode of the transistor Q8; the positive electrode of the battery BAT is connected with the drain electrode of the transistor Q7, and the negative electrode of the battery BAT is connected with the source electrode of the transistor Q8; the capacitor C3 is connected in parallel at two ends of the primary side of the power frequency transformer TX 2; the gates of the transistors Q6, Q7, Q8, Q9 and Q10 are all connected with a control module, and the control module is used for controlling the on and off of the transistors Q6, Q7, Q8, Q9 and Q10.
In one embodiment, the circuit further includes a diode D3, the diode D3 being connected in parallel across the battery BAT.
The present embodiment includes loads AC1 and AC2, so that the load is composed of two outputs, and 2 outputs can increase the load capacity by one time.
In the circuit of the embodiment, when the inverter operates in the bypass mode and the bypass module 4 operates normally, the relay RY4 of the output module 6 is closed, and when the current transformer CT2 of the bypass module 4 detects that the current exceeds the set value of the control module, the relay RY4 is opened, and the output load is reduced. Similarly, when the main power conversion module 5 works normally, the relay RY4 of the output module 6 is closed, and when the current transformer CT2 of the main power conversion module 6 detects that the current exceeds the set value of the control module, the relay RY4 is opened, so as to reduce the output load. Or the control module 5 detects that the battery voltage is lower than the alarm point of the battery, the relay RY4 is also opened, and the output load is reduced. Therefore, the loading capacity can be increased, and the machine can be protected.
Because the power grids of different countries are different, when the N line is required to be connected with the ground wire, the control module 3 can signal the relay RY5 of the output module to close the relay RY5, so that the two are connected; when the power grid of some countries does not need to output the N line and connect with the ground wire, the control module can signal to disconnect the relay RY5, and the switching can better adapt to the power consumption requirements of more regions.
Example two
The embodiment provides a photovoltaic off-grid power generation device, which comprises the photovoltaic off-grid power generation circuit provided by the first embodiment.
The present invention has been described in terms of specific examples, which are provided to aid in understanding the utility model and are not intended to be limiting. For a person skilled in the art to which the utility model pertains, several simple deductions, modifications or substitutions may be made according to the idea of the utility model.

Claims (8)

1. An off-grid photovoltaic power generation circuit, comprising: the device comprises a mains supply activation module, an auxiliary power supply module, a control module, a bidirectional conversion main power module, a bypass module and an output module;
the input end of the commercial power activation module is connected with commercial power, the output end of the commercial power activation module is connected with the auxiliary power module, the control module and the bypass module, and the commercial power activation module is used for activating commercial power to charge the auxiliary power module and supply power to a load;
the control module is connected with the auxiliary power supply module, the bypass module and the output module and is used for controlling the modules to work coordinately;
the bypass module is connected with the output module and used for supplying power to a load in a battery-free mode;
the bidirectional conversion main power module is connected with the control module and the output module, and when the auxiliary power module works, the bypass module is used for activating the auxiliary power module through the bidirectional conversion main power module to supply power to a load;
the output module is used for processing the electric signals output by the commercial power or the auxiliary power supply module and then supplying the processed electric signals to the load.
2. The photovoltaic off-grid power generation circuit of claim 1, wherein the utility power activation module comprises a rectifier bridge BR1, a transformer TX1, a diode D1, a MOS transistor Q2, a resistor R2 and a first power driving chip U1;
the input end of the rectifier bridge BR1 is connected with a mains supply, and the output end of the rectifier bridge BR1 is connected with the primary side of the transformer TX 1; the secondary side of the transformer TX1 is connected with the auxiliary power supply module; the source of the diode D1 is connected with the output end of the rectifier bridge BR1, and the drain of the diode D1 is grounded through the resistor R2; the gate of the diode D1 is connected to the first power driver chip U1.
3. The photovoltaic off-grid power generation circuit of claim 1, wherein the auxiliary power module comprises a resistor R1, a transistor Q1, a transistor Q3, a transistor Q4, a transformer TX2, a diode D2, a MOS transistor Q5, a resistor R4, a resistor R3, a second power driving chip U2;
an emitting electrode of the triode Q3 is connected with an output end of a commercial power activation module, a collector electrode of the triode Q3 is connected with the second power supply driving chip U2, a base electrode of the triode Q3 is connected with a collector electrode of the triode Q4, an emitting electrode of the triode Q4 is grounded, and the resistor R3 is connected to the base electrode of the triode Q4 in series;
a compensation pin of the second power supply driving chip U2 is connected with a collector of a triode Q1, an emitter of a triode Q1 is grounded, and a base of a triode Q1 is connected with a resistor R1 in series;
the grid electrode of the MOS tube Q5 is connected with the control pin of the second power supply driving chip U2, the source electrode of the MOS tube Q5 is connected with the primary side of the transformer TX2, and the drain electrode of the MOS tube Q5 is grounded; one end of the secondary side of the transformer TX2 is grounded, and the other end outputs a supply voltage.
4. The photovoltaic off-grid power generation circuit of claim 1, wherein the bypass module comprises a switch RY1, a switch RY2, a switch RY3, and a current sensor CT 1;
the output line L and the output line N of the mains supply activation module are connected with the output module after passing through the switch RY1 and the switch RY2 respectively; the L line of the output of the commercial power activation module is also provided with the current sensor CT1 and a switch RY3, and the current sensor CT1 is used for detecting the output current value.
5. The photovoltaic off-grid power generation circuit of claim 4, wherein the output module comprises a switch RY4, a switch RY5, a first load AC1, a second load AC 2;
the L line of the output of the bypass module is connected with one end of a first load AC1 through the switch RY4, and the other end of the first load AC1 is connected with the N line of the output of the bypass module; the L line of the output of the bypass module is also connected with one end of a second load AC2, and the other end of the second load AC2 is connected with the N line of the output of the bypass module; the N line of the bypass module output is also connected to ground through the switch RY 5.
6. The photovoltaic off-grid power generation circuit of claim 5, wherein the bidirectional conversion main power module comprises a power frequency transformer TX2, a current sensor CT2, a capacitor C2, a capacitor C3, a transistor Q6, a transistor Q7, a transistor Q8, a transistor Q9, a transistor Q10, a battery BAT, an inductor L1;
the L line output by the bypass module is connected with one end of the primary side of the power frequency transformer TX2 through the current sensor CT2, and the other end of the primary side of the power frequency transformer TX2 is connected with the N line output by the bypass module; one end of the secondary side of the power frequency transformer TX2 is connected with the source of the transistor Q9, the drain of the transistor Q9 is connected with one end of the inductor L1, the other end of the inductor L1 is connected with the source of the transistor Q7, and the drain of the transistor Q7 is connected with the output end PV +; the other end of the secondary side of the power frequency transformer TX2 is connected with the drain electrode of a transistor Q8, and the source electrode of a transistor Q8 is connected with an output end PV-; the source of the transistor Q10 is connected to the source of the transistor Q8, and the drain of the transistor Q10 is connected to the source of the transistor Q9; the source of the transistor Q7 is connected with the other end of the secondary side of the power frequency transformer TX2, and the drain of the transistor Q7 is connected with one end of the inductor L1 and one end of the inductor L1;
one end of the capacitor C2 is connected with the drain electrode of the transistor Q7, and the other end is connected with the source electrode of the transistor Q8; the positive electrode of the battery BAT is connected with the drain electrode of the transistor Q7, and the negative electrode of the battery BAT is connected with the source electrode of the transistor Q8;
the capacitor C3 is connected in parallel at two ends of the primary side of the power frequency transformer TX 2;
the gates of the transistor Q6, the transistor Q7, the transistor Q8, the transistor Q9 and the transistor Q10 are all connected with a control module, and the control module is used for controlling the on and off of the transistor Q6, the transistor Q7, the transistor Q8, the transistor Q9 and the transistor Q10.
7. The off-grid photovoltaic power generation circuit of claim 6, further comprising a diode D3, the diode D3 being connected in parallel across the battery BAT.
8. A photovoltaic off-grid power generation device, characterized in that the power generation device comprises a photovoltaic off-grid power generation circuit according to any one of claims 1-7.
CN202121905837.2U 2021-08-13 2021-08-13 Photovoltaic off-grid power generation circuit and device Active CN216649544U (en)

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Application Number Priority Date Filing Date Title
CN202121905837.2U CN216649544U (en) 2021-08-13 2021-08-13 Photovoltaic off-grid power generation circuit and device

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