Inverter, high-voltage rectifying circuit thereof and solar photovoltaic power generation system

Abstract

The utility model relates to an inverter, a high-voltage rectification circuit thereof and a solar photovoltaic power generation system, and the circuit comprises the inverter, the input end of which is connected with a DC power supply; the primary side of the transformer is connected to the output end of the inverter; one end of the first welding position is connected to one end of the secondary side of the transformer; one end of the resonant inductor is connected to the other end of the first welding position; the anode of the first diode is connected to the other end of the resonant inductor, and the cathode of the second diode is connected to the other end of the resonant inductor; one end of the second welding position is connected to the power supply output end; and one end of the third welding position is connected to the other end of the secondary of the transformer, and the other end of the third welding position is grounded. Through the scheme that one transformer and one PCB are shared, the product cost is guaranteed to the maximum extent while the product function is guaranteed, and the risk of material accumulation is reduced.

Description

Technical Field

[0001] This application relates to the technical field of power supplies, and particularly to an inverter, its high-voltage rectifier circuit, and a solar photovoltaic power generation system. Background Art

[0002] In an inverter power supply, there are multiple power components, and usually the design of the main power transformer is particularly important; the traditional main power transformers for 110Vac version and 220Vac version are different, and two types of materials need to be prepared for production; the traditional inverter soft switch needs to adjust the parameters of the resonant inductor and resonant capacitor to achieve the desired performance, and the parameters of the resonant inductor and resonant capacitor for 110Vac version and 220Vac version are different, so it is very likely that two types of PCB circuit boards will be used.

[0003] As Figure 1 Shown in the traditional inverter power supply high-voltage bridge rectifier circuit, the battery conducts alternately through the full-bridge MOS transistors Q1, Q2, Q3, Q4 for PWM conversion, is transformed by the transformer T1A, and then passes through the resonant cavity soft switch of the resonant inductor Lr1 and resonant capacitor Cr1 to improve efficiency. Finally, the bridge rectifier composed of diodes D1, D2, D3, D4 obtains the required bus voltage V_BUS; the advantage is that the topological conversion is simple to use, and its disadvantage is that the 110Vac version and 220Vac version need to use two types of transformers respectively for voltage transformation to achieve the optimal efficiency, which will increase the material preparation cost and the risk of material accumulation due to the increase in components.

[0004] As Figure 2 Shown in the new inverter power supply high-voltage rectifier circuit - voltage-doubling rectification: the battery conducts alternately through the full-bridge MOS transistors Q1, Q2, Q3, Q4 for PWM conversion, is transformed by the transformer T1A, passes through the resonant inductor Lr1, and the diodes D1, D2 form a voltage-doubling rectification to obtain the required bus voltage V_BUS (wherein when the PWM conversion is in the negative half cycle, the diode D2 conducts and D1 cuts off, charging the capacitor Cr2, and after charging is completed, 1 / 2V_BUS is obtained; when the PWM conversion changes from the negative half cycle to the positive half cycle, the diode D1 conducts and D2 cuts off, charging the capacitor Cr1, and after charging is completed, 1 / 2V_BUS is obtained; when the PWM conversion changes from the positive half cycle to the negative half cycle again, the diode D2 conducts, the capacitor Cr2 is charged (supplementing electrical energy), D1 cuts off, and the voltage on the capacitor Cr1 remains unchanged, that is, the following circuit will keep cycling, so that the output voltage is also stabilized at 2 * 1 / 2V_BUS, namely the required bus voltage V_BUS). The advantage is that the capacitors Cr1 and Cr2 not only act as charging capacitors but also as resonant capacitors, and cooperate with the resonant inductor Lr1 to form a resonant cavity soft switch to improve efficiency, and the transformer turns ratio is halved, reducing losses. Its disadvantage is that the 110Vac version and 220Vac version still need to use two types of transformers respectively.

[0005] As mentioned above, the increase in components will increase the material preparation cost and the risk of material accumulation. With the development of the times, in current inverter power supplies, the cost pressure is also increasing, and the space size of the product is also limited. Summary of the Invention

[0006] In view of the above problems, the present application provides an inverter, its high-voltage rectification circuit, and a solar photovoltaic power generation system, which solve the problem that in existing inverter power supplies, two types of transformers are required for the 110Vac version and the 220Vac version respectively, and the increase in components will increase the material preparation cost and the risk of material accumulation.

[0007] To achieve the above object, the inventor provides an inverter and its high-voltage rectification circuit, including:

[0008] A PCB circuit board and components provided on the PCB circuit board:

[0009] An inverter, the input end of the inverter is connected to a DC power supply, and the inverter is used to invert the input DC power supply into AC power;

[0010] A transformer, the primary of the transformer is connected to the output end of the inverter;

[0011] A first welding position, one end of the first welding position is connected to one end of the secondary of the transformer, and the first welding position is used to weld a resonant capacitor or resistor or jumper;

[0012] A resonant inductor, one end of the resonant inductor is connected to the other end of the first welding position;

[0013] A first diode, the anode of the first diode is connected to the other end of the resonant inductor, and the cathode of the first diode is connected to the power output end;

[0014] A second diode, the cathode of the second diode is connected to the other end of the resonant inductor, and the anode of the second diode is grounded;

[0015] A second welding position, one end of the second welding position is connected to the power output end; the other end of the second welding position is connected to the other end of the secondary of the transformer, and the second welding position is used to weld a diode or capacitor;

[0016] A third welding position, one end of the third welding position is connected to the other end of the secondary of the transformer, and the other end of the welding position is grounded.

[0017] In some embodiments, the inverter is a full-bridge inverter composed of four switching tubes.

[0018] In some embodiments, a controller is further included, and the switching tubes are MOS tubes.

[0019] In some embodiments, the DC power supply is 24V, and the winding turns ratio of the transformer is 1:7.5.

[0020] In some embodiments, it further includes:

[0021] A first filter capacitor, one end of the first filter capacitor is connected to the DC power supply, and the other end of the first filter capacitor is grounded.

[0022] In some embodiments, it further includes:

[0023] A second filter capacitor, one end of the second filter capacitor is connected to the power output terminal, and the other end of the second filter capacitor is grounded.

[0024] In some embodiments, it further includes:

[0025] A controller, the controller is connected to the control terminal of the inverter.

[0026] Another technical solution is also provided. A solar photovoltaic power generation system includes:

[0027] A solar photovoltaic panel, the solar photovoltaic panel is used to convert solar energy into electrical energy;

[0028] A battery, the battery is connected to the solar photovoltaic panel;

[0029] An inverter and its high-voltage rectification circuit, the inverter and its high-voltage rectification circuit are the inverter and its high-voltage rectification circuit according to any one of the embodiments of the present invention, and the input end of the inverter in the inverter and its high-voltage rectification circuit is connected to the battery.

[0030] Different from the prior art, the above technical solution realizes the function by setting an inverter, a transformer, a first welding position, a resonant inductor, a first diode, a second diode, a second welding position and a third welding position on a PCB circuit board. It can be achieved by welding corresponding components at the first welding position, the second welding position and the third welding position according to the required 110Vac version or 220Vac version. When the 110Vac version is needed, a resonant capacitor is welded at the first welding position, and diodes are welded at the second welding position and the third welding position. The DC power supply is inverted into alternating current by the inverter, then stepped up or down by the transformer, and then the efficiency is improved through the resonant cavity soft switching of the resonant inductor and the resonant capacitor. Finally, the required first bus voltage is obtained through the bridge rectification composed of the first diode, the second diode and the diodes at the second welding position and the third welding position. When the 220Vac version is needed, a resistor or a jumper is welded at the first welding position, and capacitors are welded at the second welding position and the third welding position. The DC power supply is inverted into alternating current by the inverter, stepped up or down by the transformer, and then the required second bus voltage is obtained through the resistor or the jumper, the resonant inductor and the pump voltage rectification composed of the first diode and the second diode. Among them, the capacitors at the second welding position and the third welding position not only act as charging capacitors but also as resonant capacitors, and cooperate with the resonant inductor to improve the efficiency through the resonant cavity soft switching. This realizes the sharing of a transformer and a PCB circuit board for the 110Vac version and the 220Vac version of the inverter power supply. While ensuring the product functions, when changing the main power high-voltage rectification circuit and the resonant cavity circuit, the product cost is minimized to the greatest extent, the risk of material accumulation is reduced, and the functional characteristics of the entire product are realized to meet the performance requirements.

[0031] The above description of the utility model content is only an overview of the technical solution of this application. In order to enable those of ordinary skill in the art to more clearly understand the technical solution of this application, and then be able to implement it according to the content recorded in the description and the drawings, and in order to make the above objects, other objects, features and advantages of this application more easily understood, the following is described in conjunction with the specific implementation manners and drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings are only used to illustrate the principles, implementation manners, applications, features and effects of the specific implementation manners and other related contents of this application, and should not be considered as a limitation to this application.

[0033] In the drawings of the specification:

[0034] Figure 1 It is a circuit schematic diagram of a traditional high-voltage bridge rectification circuit for an inverter power supply described in the background art;

[0035] Figure 2It is a schematic diagram of the circuit principle of a high-voltage rectifier circuit - voltage multiplier rectification described in the background art;

[0036] Figure 3 It is a circuit schematic diagram of the inverter and its high-voltage rectifier circuit described in the specific implementation;

[0037] Figure 4 It is another circuit schematic diagram of the inverter and its high-voltage rectifier circuit described in the specific implementation;

[0038] Figure 5 It is a circuit schematic diagram of the 110Vac version of the inverter and its high-voltage rectifier circuit described in the specific implementation;

[0039] Figure 6 It is a circuit schematic diagram of the 220Vac version of the inverter and its high-voltage rectifier circuit described in the specific implementation;

[0040] Figure 7 It is a structural schematic diagram of the solar photovoltaic power generation system described in the specific implementation.

[0041] The descriptions of the reference numerals involved in the above-mentioned drawings are as follows:

[0042] 710, solar photovoltaic panel,

[0043] 720, battery;

[0044] 730, inverter and its high-voltage rectifier circuit. Specific implementation

[0045] To illustrate in detail the possible application scenarios, technical principles, implementable specific solutions, achievable objectives and effects, etc. of this application, the following is described in detail with reference to the specific examples listed and in conjunction with the drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application, so they are only examples and cannot be used to limit the protection scope of this application.

[0046] Referring to "embodiment" in this article means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of this application. The term "embodiment" appearing in various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form the corresponding implementable technical solutions.

[0047] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the technical field to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0048] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist simultaneously. In addition, the character " / " herein generally represents an "or" logical relationship between the associated objects before and after.

[0049] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantitative, primary-secondary, or sequential relationships between these entities or operations.

[0050] Without further limitation, in this application, the expressions "including", "comprising", "having", or other similar expressions used in a statement are intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method, or product that includes the said elements. Thus, a process, method, or product that includes a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such a process, method, or product.

[0051] Similar to the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding", etc. are understood not to include the number itself; expressions such as "above", "below", "within", etc. are understood to include the number itself. In addition, in the description of the embodiments of this application, the meaning of "multiple" is two or more (including two). Similar expressions related to "many", such as "multiple groups", "multiple times", etc., are also understood in this way, unless otherwise specifically defined.

[0052] In the description of the embodiments of this application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiment or the accompanying drawings. This is only for the convenience of describing the specific embodiments of this application or for the reader's understanding, and does not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of this application.

[0053] Unless otherwise clearly specified or limited, in the description of the embodiments of the present application, terms such as "installation", "connection", "linkage", "fixation", "setting", etc. shall be understood in a broad sense. For example, the "connection" may be a fixed connection, a detachable connection, or an integral setting; it may be a mechanical connection, an electrical connection, or a communication connection; it may be a direct connection or an indirect connection through an intermediate medium; it may be the communication inside two components or the interaction relationship between two components. For those skilled in the art to which the present application pertains, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0054] Please refer to Figure 3-4 , this embodiment provides an inverter and its high-voltage rectifier circuit, including:

[0055] A PCB circuit board and components provided on the PCB circuit board:

[0056] An inverter, the input end of the inverter is connected to a DC power supply, and the inverter is used to invert the input DC power supply into alternating current;

[0057] A transformer T1A, the primary of the transformer T1A is connected to the output end of the inverter;

[0058] A first welding position C / R, one end of the first welding position C / R is connected to one end of the secondary of the transformer T1A, and the first welding position C / R is used to weld a resonant capacitor Cr1 or a resistor R1 or a jumper;

[0059] A resonant inductor Lr1, one end of the resonant inductor Lr1 is connected to the other end of the first welding position C / R;

[0060] A first diode D1, the anode of the first diode D1 is connected to the other end of the resonant inductor Lr1, and the cathode of the first diode D1 is connected to the power output end;

[0061] A second diode D2, the cathode of the second diode D2 is connected to the other end of the resonant inductor Lr1, and the anode of the second diode D2 is grounded;

[0062] A second welding position C / D1, one end of the second welding position C / D1 is connected to the power output end; the other end of the second welding position C / D1 is connected to the other end of the secondary of the transformer T1A, and the second welding position C / D1 is used to weld a diode or a capacitor;

[0063] A third welding position C / D2, one end of the third welding position C / D2 is connected to the other end of the secondary of the transformer T1A, and the other end of the welding position is grounded.

[0064] By setting an inverter, a transformer T1A, a first welding position C / R, a resonant inductor Lr1, a first diode D1, a second diode D2, a second welding position C / D1, and a third welding position C / D2 on a PCB circuit board, it can be achieved by welding corresponding components on the first welding position C / R, the second welding position C / D1, and the third welding position C / D2 according to the required 110Vac version or 220Vac version. When the 110Vac version is required, as Figure 5 shown, a resonant capacitor Cr1 is welded on the first welding position C / R, and diodes are welded on the second welding position C / D1 and the third welding position C / D2. The DC power supply is inverted into alternating current by the inverter, then stepped up by the transformer T1A, and then the efficiency is improved by the resonant cavity soft switching of the resonant inductor Lr1 and the resonant capacitor Cr1. Finally, the required first bus voltage is obtained through bridge rectification composed of the first diode D1, the second diode D2, and the diodes on the second welding position C / D1 and the third welding position C / D2. When the 220Vac version is required, as Figure 6 shown, a resistor or jumper is welded on the first welding position C / R, and capacitors are welded on the second welding position C / D1 and the third welding position C / D2. The DC power supply is inverted into alternating current by the inverter, stepped up by the transformer T1A, and the required second bus voltage is obtained through the resistor R1 or jumper, the resonant inductor Lr1, and the pump voltage rectification composed of the first diode D1 and the second diode D2. Among them, the capacitors on the second welding position C / D1 and the third welding position not only act as charging capacitors but also as resonant capacitors, and cooperate with the resonant inductor Lr1 to improve the efficiency of the resonant cavity soft switching. The 110Vac version and the 220Vac version of the inverter power supply share a transformer T1A and a PCB circuit board solution. While ensuring the product functions, changing the main power high-voltage rectification circuit and the resonant cavity circuit, the product cost is minimized to the greatest extent, the risk of material accumulation is reduced, the functional characteristics of the entire product are realized, and the performance requirements are met.

[0065] In some embodiments, the inverter is a full-bridge inverter composed of four switching tubes. By forming a full-bridge inverter with switching tubes Q1, Q2, Q3, and Q4, and the switching tubes Q1, Q2, Q3, and Q4 conducting alternately through PWM conversion, the DC power supply can be inverted into alternating current. Among them, the switching tube is a MOS tube, and MOS is the abbreviation of MOSFET. MOSFET, Metal-Oxide-Semiconductor Field-Effect Transistor, is simply called Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET). It is a field-effect transistor (FET) with an insulated gate, and the conductivity of the device is determined by voltage. In other embodiments, other transistors can also be used as switching tubes, such as insulated gate bipolar transistors IGBTs, etc.

[0066] In some embodiments, the DC power supply is 24V, and the winding turns ratio of the transformer T1A is 1:7.5. Among them, when the DC power supply uses 24V and the winding turns ratio of the transformer T1A is 1:7.5, the first bus voltage of 180V and the second bus voltage of 360V can be obtained. In other embodiments, the DC power supply can also use 12V, and the winding turns ratio of the transformer T1A is 1:15, and the first bus voltage of 180V and the second bus voltage of 360V can also be obtained.

[0067] In some embodiments, it further includes:

[0068] A first filter capacitor CE3, one end of the first filter capacitor CE3 is connected to the DC power supply, and the other end of the first filter capacitor CE3 is grounded.

[0069] By setting the first filter capacitor CE3 at the input end of the inverter for power supply filtering and voltage stabilization.

[0070] In some embodiments, it further includes:

[0071] A second filter capacitor CE2, one end of the second filter capacitor CE2 is connected to the power supply output end, and the other end of the second filter capacitor CE2 is grounded.

[0072] The second filter capacitor CE2 is used to reduce the AC ripple coefficient and improve the high-efficiency smooth DC output. The second filter capacitor CE2 not only makes the DC output of the power supply smooth and stable, reduces the influence of the alternating pulsating current on the electronic circuit, but also can absorb the current fluctuations generated during the operation of the electronic circuit and the interference introduced through the AC power supply, making the working performance of the electronic circuit more stable.

[0073] In some embodiments, it further includes:

[0074] A controller, the controller being connected to the control terminal of the inverter.

[0075] The controller can be set on the PCB circuit board. The controller outputs a control signal to the inverter to control the operation of the inverter. For example, when the inverter is a full-bridge inverter composed of four switching tubes, the controller outputs PWM signals to the four switching tubes respectively to control the conduction of the four switching tubes, so as to realize the inversion of the DC power supply into AC power. In other embodiments, the control terminal of the inverter can also be connected to an external controller, that is, an interface for accessing the external controller is provided on the PCB circuit board, so that the external controller can access the control terminal of the inverter through the interface on the PCB to realize the control of the inverter.

[0076] In some embodiments, for the 110Vac version, a bridge rectifier circuit configuration is selected (i.e., the transformer winding turns ratio is selected as 1:7.5): the battery conducts alternately through the full-bridge MOS tubes Q1, Q2, Q3, and Q4 for PWM conversion, is transformed by the transformer T1A, and then passes through the resonant inductor Lr1 and resonant capacitor Cr1 (where R1 / jumper position NC is not soldered) of the resonant cavity soft switch to improve the efficiency. Finally, the bridge rectifier composed of the diodes D1, D2, C / D1, and C / D2 obtains the required bus voltage V_BUS: 180V;

[0077] For the 220Vac version, a voltage doubler rectifier circuit configuration is selected (i.e., the transformer winding turns ratio can be selected as 1:7.5): the battery conducts alternately through the full-bridge MOS tubes Q1, Q2, Q3, and Q4 for PWM conversion, is transformed by the transformer T1A, passes through R1 / jumper (for connecting the circuit, where the Cr1 position NC is not soldered), resonant inductor Lr1, and the diodes D1 and D2 to form a voltage doubler rectifier to obtain the required bus voltage V_BUS: 360V. C / D1 and C / D2 use capacitors not only as charging capacitors but also as resonant capacitors, and cooperate with the resonant inductor Lr1 to form a resonant cavity soft switch to improve the efficiency.

[0078] By optimizing the existing high-voltage bridge rectifier circuit and voltage doubler rectifier circuit on the inverter power supply, sharing a transformer and a PCB circuit board solution for the 110Vac version and 220Vac version, sharing the encapsulation of the resonant capacitor and diode (selecting suitable devices for the 110Vac version and 220Vac version), and adding R1 / jumper (for connecting the circuit), it is possible to simultaneously meet the bus voltage required by the product and the inverter power supply with resonant soft switching. In the case of sharing devices, ensure the reliability of the product to achieve cost optimization, reduce the risk of material accumulation, and realize the functional characteristics of the entire product.

[0079] Please refer to Figure 7 , in another embodiment, a solar photovoltaic power generation system includes:

[0080] A solar photovoltaic panel 710, which is used to convert solar energy into electrical energy;

[0081] A battery 720, which is connected to the solar photovoltaic panel;

[0082] An inverter and its high-voltage rectifier circuit 730. The inverter and its high-voltage rectifier circuit 730 are the inverter and its high-voltage rectifier circuit 730 in the above embodiment. The input end of the inverter in the inverter and its high-voltage rectifier circuit 730 is connected to the battery. It should be noted that in the prior art, in order to charge the battery 720, actually, the voltage of the solar photovoltaic panel 710 needs to flow into the battery 720 for charging after being controlled by the charging circuit. The charging circuit is an existing circuit. For example, the following patent applied by the applicant is also disclosed. Patent number: 202321794586.4, Title: A solar charging input overvoltage protection circuit and its energy storage terminal. It discloses a circuit for charging a battery through a solar photovoltaic panel. Here, this application is only for power supply indication. For voltage matching and charging control, an existing charging circuit can be used.

[0083] Solar energy is converted into electrical energy by the solar photovoltaic panel 710 and stored in the battery 720, and the battery 720 provides a DC power supply for the inverter and its high-voltage rectification circuit 730. In the inverter and its high-voltage rectification circuit 730, an inverter, a transformer T1A, a first welding position C / R, a resonant inductor Lr1, a first diode D1, a second diode D2, a second welding position C / D1, and a third welding position C / D2 are arranged on the PCB circuit board; it can be achieved by welding corresponding components on the first welding position C / R, the second welding position C / D1, and the third welding position C / D2 according to the required 110Vac version or 220Vac version. When the 110Vac version is required, a resonant capacitor Cr1 is welded on the first welding position C / R, and diodes are welded on the second welding position C / D1 and the third welding position C / D2. The DC power supply is inverted into alternating current by the inverter, then transformed by the transformer T1A, and then the efficiency is improved through the resonant cavity soft switch of the resonant inductor Lr1 and the resonant capacitor Cr1. Finally, the required first bus voltage is obtained through the bridge rectification composed of the first diode D1, the second diode D2, and the diodes on the second welding position C / D1 and the third welding position C / D2; when the 220Vac version is required, a resistor or jumper is welded on the first welding position C / R, and capacitors are welded on the second welding position C / D1 and the third welding position C / D2. The DC power supply is inverted into alternating current by the inverter, transformed by the transformer T1A, and the required second bus voltage is obtained through the resistor or jumper, the resonant inductor Lr1, and the pump voltage rectification composed of the first diode D1 and the second diode D2. Among them, the capacitors on the second welding position C / D1 and the third welding position C / D2 are used not only as charging capacitors but also as resonant capacitors, and cooperate with the resonant inductor Lr1 to improve the efficiency of the resonant cavity soft switch. The 110Vac version and the 220Vac version of the inverter power supply share a transformer T1A and a PCB circuit board solution. While ensuring the product function, while changing the main power high-voltage rectification circuit and the resonant cavity circuit, the product cost is guaranteed to the greatest extent, the risk of material accumulation is reduced, and the functional characteristics of the entire product are realized to meet the performance requirements.

[0084] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of this application, the patent protection scope of this application cannot be limited thereby. Any technical solutions obtained by equivalent structure or equivalent process substitution or modification based on the essential concept of this application and using the content recorded in the text and drawings of the specification of this application, as well as those directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are all included in the patent protection scope of this application.

Claims

1. An inverter and a high voltage rectifier circuit thereof, characterized in that: include: PCB circuit board and the following items arranged on the PCB circuit board: An inverter, wherein the input end of the inverter is connected to a DC power supply, and the inverter is used to invert the input DC power supply into AC power; A transformer, wherein a primary end of the transformer is connected to an output end of the inverter; A first welding position, one end of which is connected to one end of the secondary of the transformer, and the first welding position is used for welding a resonant capacitor or a resistor or a jumper; a resonant inductor, one end of which is connected to the other end of the first welding position; a first diode, wherein an anode of the first diode is connected to the other end of the resonant inductor, and a cathode of the first diode is connected to an output end of a power supply; a second diode, wherein a cathode of the second diode is connected to the other end of the resonant inductor, and an anode of the second diode is grounded; A second welding position, one end of which is connected to the output end of the power supply; the other end of which is connected to the other end of the secondary of the transformer, and the second welding position is used for welding a diode or a capacitor; A third welding position, one end of which is connected to the other end of the secondary of the transformer, and the other end of which is grounded.

2. The inverter and high-voltage rectifier circuit according to claim 1, characterized in that: The inverter is a full-bridge inverter composed of four switching tubes.

3. The inverter and the high-voltage rectifier circuit thereof according to claim 2, characterized in that: It also includes a controller, and the switch tube is a MOS tube.

4. The inverter and high-voltage rectifier circuit according to claim 1, characterized in that: The DC power supply is 24V, and the winding turns ratio of the transformer is 1:7.

5.

5. The inverter and the high-voltage rectifier circuit thereof according to claim 1, characterized in that: Also includes: A first filter capacitor, one end of the first filter capacitor is connected to a DC power supply, and the other end of the first filter capacitor is grounded.

6. The inverter and high-voltage rectifier circuit thereof according to claim 1, characterized in that: Also includes: A second filter capacitor, one end of the second filter capacitor is connected to the power output end, and the other end of the second filter capacitor is grounded.

7. The inverter and the high-voltage rectifier circuit thereof according to claim 1, characterized in that: Also includes: A controller is connected to a control end of the inverter.

8. A solar photovoltaic power generation system, characterized in that: include: Solar photovoltaic panels, which are used to convert solar energy into electrical energy; A battery connected to the solar photovoltaic panel; An inverter and a high-voltage rectifier circuit thereof, wherein the inverter and the high-voltage rectifier circuit thereof are the inverter and the high-voltage rectifier circuit thereof according to any one of claims 1 to 7, and the input end of the inverter in the inverter and the high-voltage rectifier circuit thereof is connected to the battery.

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