CN116232094A - Auxiliary power supply and inverter - Google Patents
Auxiliary power supply and inverter Download PDFInfo
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- CN116232094A CN116232094A CN202310173244.9A CN202310173244A CN116232094A CN 116232094 A CN116232094 A CN 116232094A CN 202310173244 A CN202310173244 A CN 202310173244A CN 116232094 A CN116232094 A CN 116232094A
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- 238000002955 isolation Methods 0.000 claims abstract description 44
- 239000003990 capacitor Substances 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 9
- 238000004804 winding Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
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Abstract
The invention provides an auxiliary power supply and an inverter, wherein an alternating current side input end of the auxiliary power supply is connected with an input end of an isolation converter through a rectifying circuit, and a direct current side input end of the auxiliary power supply is connected with the input end of the isolation converter through a first diode; the auxiliary power supply can realize the isolation conversion of the input voltage at the alternating-current side of the auxiliary power supply and the isolation conversion of the input voltage at the direct-current side by only one isolation converter, so that the power supply is further carried out for the load at the later stage, and the cost of the auxiliary power supply is reduced. Meanwhile, an alternating current side filter capacitor and a direct current side filter capacitor in the prior art are eliminated, and the cost of the auxiliary power supply is further reduced.
Description
Technical Field
The invention relates to the technical field of photovoltaics, in particular to an auxiliary power supply and an inverter.
Background
In the photovoltaic power generation field, the existing auxiliary power supply supplies power to respective loads of a rear stage by adopting a direct current power supply and an alternating current power supply.
As shown in fig. 1, when the inverter performs grid-connected power generation, both an ac power supply and a dc power supply output voltages, and supply power to respective loads of a subsequent stage; when the inverter is in a standby state, the alternating current power supply supplies power to the rear-stage load, so that the rear-stage load can carry out PID (PotentialInduced Degradation, potential induced decay) repair, inverter night communication and software upgrading in the standby state of the inverter. The scheme can supply power to respective loads of the rear stage through the direct current power supply and the alternating current power supply, but the alternating current power supply has larger load, high voltage resistance, large capacity and high price, and meanwhile, alternating current and direct current dual power supplies are needed to supply power, so that the overall cost is higher.
Disclosure of Invention
In view of the above, the present invention provides an auxiliary power supply and an inverter to reduce the cost of the auxiliary power supply.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the first aspect of the present invention provides an auxiliary power supply comprising: the rectifier circuit, the first diode and the isolation converter; wherein,,
the input end of the rectifying circuit is used as the alternating current side input end of the auxiliary power supply;
the output end of the rectifying circuit is connected with the input end of the isolation converter;
the direct-current side input end of the auxiliary power supply is connected with the input end of the isolation converter through the first diode;
the output end of the isolation converter is used as the output end of the auxiliary power supply.
Optionally, the dc voltage received by the dc side input terminal is greater than the minimum value of the output voltage of the rectifying circuit.
Optionally, the method further comprises: a filter capacitor;
the filter capacitor is connected between the anode and the cathode of the input end of the isolation converter.
Optionally, the capacitance value of the filter capacitor is smaller than a preset capacitance value.
Optionally, the method further comprises: a second diode;
the output end of the rectifying circuit is connected with the input end of the isolation converter through the second diode.
Optionally, the isolation converter includes a flyback converter circuit.
Optionally, the rectifying circuit is an uncontrolled full bridge rectifying circuit.
The second aspect of the present invention also provides an inverter comprising: an inverter unit, a bus capacitor, and the auxiliary power supply according to any one of the first aspect; wherein,,
the direct current side of the inversion unit is used for being connected with the direct current side of the inverter;
an alternating current side of the inverter unit is used for connecting with the alternating current side of the inverter;
the bus capacitor is connected between the positive electrode and the negative electrode of the direct-current side of the inversion unit;
the direct-current side input end of the auxiliary power supply is connected with the direct-current side of the inversion unit;
the ac side input of the auxiliary power supply is connected with the ac side of the inverter.
Optionally, the method further comprises: at least one DC/DC conversion circuit;
one end of the DC/DC conversion circuit is connected with the direct current side of the inverter;
the other end of the DC/DC conversion circuit is connected with the direct current side of the inversion unit through a direct current bus.
Optionally, the method further comprises: an alternating current filter;
the input end of the alternating current filter is connected with the alternating current side of the inversion unit;
the output end of the alternating current filter is used for being connected with the alternating current side of the inverter.
Optionally, the method further comprises: an alternating current relay;
the input end of the alternating current relay is connected with the output end of the alternating current filter;
the output end of the alternating current relay is used for being connected with the alternating current side of the inverter.
The invention provides an auxiliary power supply, wherein an alternating current side input end of the auxiliary power supply is connected with an input end of an isolation converter through a rectifying circuit, and a direct current side input end of the auxiliary power supply is connected with the input end of the isolation converter through a first diode; the auxiliary power supply can realize the isolation conversion of the input voltage at the alternating-current side of the auxiliary power supply and the isolation conversion of the input voltage at the direct-current side by only one isolation converter, so that the power supply is further carried out for the load at the later stage, and the cost of the auxiliary power supply is reduced. Meanwhile, an alternating current side filter capacitor and a direct current side filter capacitor in the prior art are eliminated, and the cost of the auxiliary power supply is further reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will briefly explain the embodiments or the drawings to be used in the description of the prior art, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an auxiliary power supply according to the prior art;
fig. 2 is a schematic structural diagram of an auxiliary power supply according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of another structure of an auxiliary power supply according to an embodiment of the present invention;
fig. 4 is a waveform diagram of a dc voltage output from a rectifying circuit according to an embodiment of the present invention;
FIG. 5 is a voltage waveform diagram of two ends of a filter capacitor according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of another structure of an auxiliary power supply according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a specific structure of an auxiliary power supply according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an inverter according to an embodiment of the present invention;
fig. 9 is another schematic structural diagram of an inverter according to an embodiment of the present invention;
fig. 10 to 13 are schematic views of another four structures according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The invention provides an auxiliary power supply, which is used for reducing the cost of the auxiliary power supply.
As shown in fig. 2, the auxiliary power supply 100 specifically includes: a rectifier circuit 10, a first diode D1, and an isolation converter 20; wherein:
the input end of the rectifying circuit 10 is used as the alternating current side input end of the auxiliary power supply 100, and the output end of the rectifying circuit 10 is connected with the input end of the isolation converter 20; the output of the inverter 20 is isolated as the output of the auxiliary power supply 100.
As shown in fig. 2, the dc side input terminal of the auxiliary power supply 100 (the positive electrode thereof is +, and the negative electrode thereof is +, respectively) is connected to the input terminal of the isolation converter 20 via the first diode D1, so that the voltage output from the rectifying circuit 10 is not reversely fed to the dc side input terminal of the auxiliary power supply 100.
The specific working principle is as follows:
as shown in fig. 2, the auxiliary power supply 100 receives a dc voltage through a dc side input terminalV dc And output to the isolation converter 20 through the first diode D1, the isolation converter 20 can output the received DC voltage V dc Performing isolation transformation, and then outputting to corresponding loads; the ac side input terminal of the auxiliary power supply 100 receives a corresponding ac voltage V ac The rectifying circuit 10 receives an ac voltage V ac Rectifying and outputting a corresponding dc voltage to the isolation converter 20, so that the isolation converter 20 may also perform isolation conversion on the dc voltage output by the rectifying circuit 10 and then output the dc voltage to a corresponding load.
In practical application, since the ac side of the auxiliary power supply 100 is not provided with a large-capacity filter capacitor for receiving the ac voltage V at the ac side ac Filtering is performed (the waveform of which is shown in fig. 4), so that the rectifying circuit 10 rectifies the ac voltage V received at the ac side ac After rectification, the DC voltage V is output r The method comprises the steps of carrying out a first treatment on the surface of the In practical application, the DC voltage V received by the DC side input end dc The value of the output voltage greater than the minimum value of the rectifying circuit 10 is not particularly limited, and the value of the output voltage is not particularly limited, and the output voltage is only required to be greater than the minimum value of the output voltage of the rectifying circuit 10 according to the specific application environment, and is within the protection scope of the application.
In the auxiliary power supply 100 provided in this embodiment, an ac side input terminal of the auxiliary power supply 100 is connected to an input terminal of the isolation converter 20 through the rectifying circuit 10, and a dc side input terminal of the auxiliary power supply 100 is connected to an input terminal of the isolation converter 20 through the first diode D1; the ac side and the dc side of the auxiliary power supply 100 can control the ac side input voltage of the auxiliary power supply 100 to perform the isolation conversion and the dc side input voltage to perform the isolation conversion at the corresponding time by only adopting the same isolation converter 20, thereby supplying power to the subsequent loads, and reducing the cost of the auxiliary power supply 100. Meanwhile, the ac side filter capacitor and the dc side filter capacitor with high withstand voltage and large capacity in the prior art are eliminated, and the cost of the auxiliary power supply 100 is further reduced.
On the basis of the above embodiment, the auxiliary power supply 100 may further include, as shown in fig. 3: a filter capacitor C1; wherein the filter capacitor C1 is connected between the positive and negative electrodes of the input terminal of the isolation converter 20
In practical application, the capacitance value of the filter capacitor C1 is smaller than a preset capacitance value, and the value of the preset capacitance value can be obtained through theoretical calculation or experimental test, which is not limited in practical application, and is within the protection scope of the application depending on the specific application environment.
It is worth noting that when the alternating voltage V ac Rectified DC voltage peak value V ac_pk Greater than DC voltage V dc At the time, the voltage V across the filter capacitor C1 c1 As shown in fig. 5, the highest voltage across the filter capacitor C1 is equal to the ac voltage V ac Rectified DC voltage peak value V ac_pk The method comprises the steps of carrying out a first treatment on the surface of the When the voltage across the filter capacitor C1 drops to the voltage value received by the dc side of the auxiliary power supply 100, the voltage across the filter capacitor C1 is clamped to the voltage value received by the dc side input of the auxiliary power supply 100, and the auxiliary power supply 100 can pass through the dc voltage V received by the dc side input dc And supplying power to the corresponding load. So that the auxiliary power supply 100 receives the ac voltage V through the ac side input terminal for a part of time during each cycle ac Supplying power to the corresponding load, and receiving the direct current voltage V at the other part of time through the input end of the direct current side dc Supplying power to the corresponding load, i.e., each cycle of ac input and dc input provides a portion of energy to the subsequent stage, improves the utilization of auxiliary power supply 100.
In practical application, when the alternating voltage V ac Rectified DC voltage peak value V ac_pk Less than DC voltage V dc At the time, the voltage across the filter capacitor C1 is clamped to the DC voltage V dc At this time, the load connected to the auxiliary power supply 100 is a dc voltage V received by the dc side of the auxiliary power supply 100 dc Supplying power; when the auxiliary power supply 100 receives the DC voltage V dc At low level, the load connected to the auxiliary power supply 100 is an ac voltage V received by the ac side of the auxiliary power supply 100 ac The power supply is performed, and at this time, the filtering effect can be realized only by adopting the filter capacitor C1 with a smaller capacitance value, so that the cost of the auxiliary power supply 100 is reduced.
In the auxiliary power supply 100 provided in this embodiment, the filtering capacitor C1 is disposed between the positive and negative electrodes of the input end of the isolation converter 20, so as to filter out high-frequency ripples in the ac voltage and the dc voltage, thereby realizing the filtering effect on the ac/dc power supply.
On the basis of the above embodiment, the auxiliary power supply 100 may further include, as shown in fig. 6: a second diode D2; the output terminal of the rectifying circuit 10 is connected to the input terminal of the isolation converter 20 through a second diode D2.
Preferably, the isolation converter 20 in the auxiliary power supply 100 may include a flyback converter circuit, as shown in fig. 5, which specifically includes: the power tube Q1, the transformer T1, the third diode D3, the inductor L1 and the second capacitor C2; wherein:
the power tube Q1 is arranged between the primary winding of the transformer T1 and the ground; the other end of the primary winding of the transformer T1 is connected with the positive input end of the direct current side of the auxiliary power supply 100; one end of a secondary winding of the transformer T1 is connected with the positive electrode of a third diode D3, the negative electrode of the third diode D3 is connected with one end of an inductor L1, the other end of the inductor L1 is connected with one end of a second capacitor C2, and the connection point is used as a positive output end of the isolation converter 20; the other end of the secondary winding of the transformer T1 is connected to the primary winding at the same name as the positive input end of the auxiliary power supply 100 on the dc side, and to the other end of the second capacitor C2, and the connection point is used as the negative output end of the isolation converter 20.
The auxiliary power supply 100 provided in this embodiment improves the safety of the auxiliary power supply 100 by using the flyback conversion circuit as the isolation converter 20 of the auxiliary power supply 100 to isolate the input terminal and the output terminal of the auxiliary power supply 100. In practical applications, the isolated converter 20 may also employ other isolated DC/DC conversion circuits, which are only examples herein and are not limited thereto.
On the basis of the above embodiment, the rectifying circuit 10 in the auxiliary power supply 100 may be an uncontrolled full-bridge rectifying circuit, as shown in fig. 7, which specifically includes: a fourth diode D4, a fifth diode D5, a sixth diode D6, and a seventh diode D7; wherein:
the anode of the fourth diode D4 is connected to the cathode of the fifth diode D5, and the connection point is used as one pole of the input end of the rectifying circuit 10; the positive electrode of the sixth diode D6 is connected to the negative electrode of the seventh diode D7, and the connection point is used as the other electrode of the input end of the rectifying circuit 10; the cathode of the fourth diode D4 is connected to the cathode of the sixth diode D6, and the connection point is used as the positive output end of the rectifying circuit 10; the positive electrode of the fifth diode D5 is connected to the positive electrode of the seventh diode D7, and the connection point is used as the negative output terminal of the rectifier circuit 10.
The auxiliary power supply 100 according to the present embodiment uses an uncontrolled full-bridge rectifier circuit as the rectifier circuit 10 of the auxiliary power supply 100 to provide the ac voltage V received at the ac side input terminal of the auxiliary power supply 100 ac After rectification, the corresponding direct current voltage V is output r The method comprises the steps of carrying out a first treatment on the surface of the And prevents the current outputted from the rectifying circuit 10 from flowing backward, improving the safety of the auxiliary power supply 100. In practical applications, the rectifying circuit 10 may be a controllable rectifying circuit, which is only an example, but not limited thereto.
Another embodiment of the present invention also provides an inverter, as shown in fig. 8, including: the inverter unit 30, the bus capacitor C3, and the auxiliary power supply 100 as described in any of the above embodiments; wherein:
a dc side of the inverter unit 30 for connecting the dc side of the inverter, and an ac side of the inverter unit 30 for connecting the ac side of the inverter; the bus capacitor C3 is connected between the positive and negative poles of the dc side of the inverter unit 30; the dc side input terminal of the auxiliary power supply 100 is connected to the dc side of the inverter unit 30; an ac side input terminal of the auxiliary power supply 100 is connected to an ac side of the inverter; when the inverter unit 30 is a three-phase inverter unit, the ac side input terminal of the auxiliary power supply 100 may be connected to any two phases of the ac side of the inverter.
Optionally, as shown in fig. 9, the inverter further includes: at least one DC/DC conversion circuit 40 (only two DC/DC conversion circuits 40 are shown in fig. 9 as an example); one end of each DC/DC conversion circuit 40 is connected to the DC side of the inverter, and the other end of each DC/DC conversion circuit 40 is connected to the DC side of the inverter unit 30 via a DC bus.
Optionally, as shown in fig. 10, the inverter further includes: a direct current EMI filter 50; the input end of the DC EMI filter 50 is connected to the DC side of the inverter, and the output end of the DC EMI filter 50 is connected to the DC/DC conversion circuit 40.
In practical applications, the dc EMI filter 50 may also be connected to the dc side of the inverter through a dc switch; and the direct current side of the inverter can be connected with the corresponding photovoltaic string through the string detection module, so that the inverter can judge whether the photovoltaic string fails through the string detection module.
The inverter provided by the embodiment reduces the cost of the inverter by adopting the auxiliary power supply 100; and by adopting the direct current EMI filter 50, the impact of the output voltage of the inverter unit 30 on the auxiliary power supply 100 is reduced, and meanwhile, the auxiliary power supply 100 is prevented from interfering with the inverter unit 30, so that the reliability and safety of the inverter are improved.
On the basis of the above embodiment, the inverter may further include, as shown in fig. 11: an ac filter 60; the input end of the ac filter 60 is connected to the ac side of the inverter unit 30, and the output end of the ac filter 60 is connected to the ac side of the inverter.
Optionally, as shown in fig. 12, the inverter may further include: an ac relay 70; the input end of the ac relay 70 is connected to the output end of the ac filter 60, and the output end of the ac relay 70 is used for connecting to the ac side of the inverter.
Preferably, as shown in fig. 13, the inverter further includes: an alternating-current EMI filter 80; wherein the input of the ac EMI filter 80 is connected to the output of the ac relay 70, and the output of the ac EMI filter 80 is connected to the ac side of the inverter.
The inverter provided in this embodiment filters the received ac current by using the ac filter 60; and by adopting the alternating current EMI filter 80, the impact of the output voltage of the inverter unit 30 on the auxiliary power supply 100 is reduced, and meanwhile, the auxiliary power supply 100 is prevented from interfering with the inverter unit 30, so that the reliability and safety of the inverter are improved.
The same and similar parts of the embodiments in this specification are all mutually referred to, and each embodiment focuses on the differences from the other embodiments. In particular, for a system or system embodiment, since it is substantially similar to a method embodiment, the description is relatively simple, with reference to the description of the method embodiment being made in part. The systems and system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The features described in the various embodiments of the present disclosure may be interchanged or combined with one another in the description of the disclosed embodiments to enable those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. An auxiliary power supply, comprising: the rectifier circuit, the first diode and the isolation converter; wherein,,
the input end of the rectifying circuit is used as the alternating current side input end of the auxiliary power supply;
the output end of the rectifying circuit is connected with the input end of the isolation converter;
the direct-current side input end of the auxiliary power supply is connected with the input end of the isolation converter through the first diode;
the output end of the isolation converter is used as the output end of the auxiliary power supply.
2. The auxiliary power supply of claim 1 wherein the dc voltage received at the dc side input is greater than the minimum output voltage of the rectifier circuit.
3. The auxiliary power supply of claim 1, further comprising: a filter capacitor;
the filter capacitor is connected between the anode and the cathode of the input end of the isolation converter.
4. An auxiliary power supply as claimed in claim 3, wherein the capacitance of the filter capacitor is less than a predetermined capacitance.
5. The auxiliary power supply of claim 1, further comprising: a second diode;
the output end of the rectifying circuit is connected with the input end of the isolation converter through the second diode.
6. The auxiliary power supply of claim 1 wherein the isolated converter comprises a flyback converter circuit.
7. The auxiliary power supply of any one of claims 1 to 6 wherein the rectifying circuit is an uncontrolled full bridge rectifying circuit.
8. An inverter, comprising: an inverter unit, a bus capacitor, and the auxiliary power supply according to any one of claims 1 to 7; wherein,,
the direct current side of the inversion unit is used for being connected with the direct current side of the inverter;
an alternating current side of the inverter unit is used for connecting with the alternating current side of the inverter;
the bus capacitor is connected between the positive electrode and the negative electrode of the direct-current side of the inversion unit;
the direct-current side input end of the auxiliary power supply is connected with the direct-current side of the inversion unit;
the ac side input of the auxiliary power supply is connected with the ac side of the inverter.
9. The inverter of claim 8, further comprising: at least one DC/DC conversion circuit;
one end of the DC/DC conversion circuit is connected with the direct current side of the inverter;
the other end of the DC/DC conversion circuit is connected with the direct current side of the inversion unit through a direct current bus.
10. The inverter according to any one of claims 8 to 9, further comprising: an alternating current filter;
the input end of the alternating current filter is connected with the alternating current side of the inversion unit;
the output end of the alternating current filter is used for being connected with the alternating current side of the inverter.
11. The inverter of claim 10, further comprising: an alternating current relay;
the input end of the alternating current relay is connected with the output end of the alternating current filter;
the output end of the alternating current relay is used for being connected with the alternating current side of the inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310173244.9A CN116232094A (en) | 2023-02-23 | 2023-02-23 | Auxiliary power supply and inverter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310173244.9A CN116232094A (en) | 2023-02-23 | 2023-02-23 | Auxiliary power supply and inverter |
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| CN116232094A true CN116232094A (en) | 2023-06-06 |
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| CN202310173244.9A Pending CN116232094A (en) | 2023-02-23 | 2023-02-23 | Auxiliary power supply and inverter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117792064A (en) * | 2024-02-28 | 2024-03-29 | 美世乐(广东)新能源科技有限公司 | Auxiliary power supply system of photovoltaic inverter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117792064A (en) * | 2024-02-28 | 2024-03-29 | 美世乐(广东)新能源科技有限公司 | Auxiliary power supply system of photovoltaic inverter |
| CN117792064B (en) * | 2024-02-28 | 2024-05-07 | 美世乐(广东)新能源科技有限公司 | Auxiliary power supply system of photovoltaic inverter |
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