CN211508888U - Wind power generation grid-connected inverter - Google Patents
Wind power generation grid-connected inverter Download PDFInfo
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- CN211508888U CN211508888U CN202020302209.4U CN202020302209U CN211508888U CN 211508888 U CN211508888 U CN 211508888U CN 202020302209 U CN202020302209 U CN 202020302209U CN 211508888 U CN211508888 U CN 211508888U
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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
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
The utility model provides a wind power generation grid-connected inverter, including quick-witted case, host system, rectification control module, contravariant control module and filter module, rectification control module and contravariant control module set up side by side in the upper portion space of quick-witted incasement, and filter module sets up in the lower part space of quick-witted incasement, and filter module is including the fan side filter unit and the contravariant side filter unit that set up side by side, and wherein, fan side filter unit is close to rectification control module, and contravariant side filter unit is close to contravariant control module. The utility model modularizes the components according to their functions and sets the unit modules according to the current direction order, so that the distance between adjacent components is small, the consumption of copper bars and cables is saved, and the material cost is reduced; the whole machine has compact structure, and the volume of the wind power generation grid-connected inverter is reduced; the filtering module is designed separately from the rectification control module and the inversion control module, so that electromagnetic interference is reduced.
Description
Technical Field
The utility model relates to a wind power equipment field especially relates to a wind power generation grid-connected inverter.
Background
The wind power generation grid-connected inverter is a core component in a wind power generation system, and is responsible for controlling alternating current-direct current-alternating current conversion of current, ensuring safety and the like in the system. In recent years, with the development of wind power generation technology and market demand, the wind power generation grid-connected inverter needs to be considered to be small, light and economical while improving reliability.
Because the size and the thermal power of components in the inverter are larger, the whole machine of the existing wind power generation grid-connected inverter is also correspondingly heavier, so that the material, transportation and storage costs are high; the existing wind power generation grid-connected inverter chassis has the disadvantages of disordered internal and external wiring, low internal space utilization rate, poor electromagnetic isolation, poor overall structure layout, difficult assembly and low reliability.
Particularly, a medium and small-sized suspension type wind power generation grid-connected inverter is directly arranged outdoors, and the environment is relatively severe, so that the aim of preventing water and dust is fulfilled by ensuring that a case has good airtightness. However, the heat dissipation performance of the chassis is reduced while the tightness is enhanced, and the service life of the equipment is shortened.
SUMMERY OF THE UTILITY MODEL
In view of the above prior art's shortcoming, the utility model aims to provide a wind power generation grid-connected inverter for solve among the prior art wind power generation grid-connected inverter complete machine bulky, wiring complicated, structural configuration not good enough, electromagnetic influence is big and the poor problem of thermal diffusivity.
In order to achieve the above purpose, the utility model adopts the following scheme: the utility model provides a wind power generation grid-connected inverter, including quick-witted case, host system and with host system electric connection's rectification control module, contravariant control module and filter module, rectification control module with contravariant control module set up side by side in the upper portion space of machine incasement, filter module set up in the lower part space of machine incasement, filter module is including fan side filter unit and the contravariant side filter unit that sets up side by side, wherein, fan side filter unit is close to rectification control module, contravariant side filter unit is close to contravariant control module.
Preferably, at least one cooling fan is arranged below the rectification control module and the inversion control module and used for cooling the rectification control module and the inversion control module.
Preferably, the chassis includes the cabinet body and front panel, the radiator is installed to the rear side of the cabinet body, the radiator passes through the heat dissipation fluting that the cabinet body rear side was opened and is established with the rectification control module with the laminating of contravariant control module is used for right the rectification control module with the contravariant control module dispels the heat.
Preferably, the fan-side filter unit is of an LC structure, the inverter-side filter unit is of an LCL structure, and both a three-phase output inductor in the fan-side filter unit and a three-phase input inductor in the inverter-side filter unit are attached to the radiator through a heat dissipation slot opened on the rear side of the case.
Preferably, the heat radiator and the cabinet body contact part adopt heat conduction silicone grease or heat conduction silicone sheet to transfer heat.
Preferably, the front end surface of the cabinet body adopts an outward flanging structure to form a waterproof diversion trench, the inner side of the front panel is provided with a sealing rubber strip, and the sealing rubber strip is matched with the waterproof diversion trench and used for forming a sealed chamber in the cabinet body when the front panel covers the front side of the cabinet body.
Preferably, an auxiliary power supply is installed on the top side inside the case.
Preferably, the wind power generation grid-connected inverter further comprises a communication monitoring module, and the communication monitoring module is connected with external communication monitoring equipment for communication monitoring through at least one communication mode of Ethernet, WIFI, GPRS and Bluetooth.
Preferably, wind power generation grid-connected inverter still includes the brake module, the brake module is located lower part space in the quick-witted case and be close to rectification control module, the brake module is including the automatic braking the control unit and the manual braking the control unit that set up from top to bottom, manual braking the control unit shift knob installs in the bottom outside of the cabinet body, the automatic braking the control unit is connected main control module.
Preferably, the main control module and the inverter control module are integrated on the same printed circuit board.
Preferably, the wind power generation grid-connected inverter further comprises an unloading control module, and the unloading control module and the rectification control module are integrally packaged in the same power module.
Preferably, the wind power generation grid-connected inverter further comprises a lightning protection module, the lightning protection module and the filtering module are integrated on the same printed circuit board, the lightning protection module comprises a fan side lightning protection unit and a network side lightning protection unit, the fan side lightning protection unit is close to the fan side filtering unit, and the network side lightning protection unit is close to the inversion side filtering unit.
Preferably, the wind power generation grid-connected inverter further comprises an input/output module arranged at the bottom of the case, and the input/output module comprises a fan input unit, a fan output unit, a signal output unit and an unloading output unit; the fan input unit is connected with the input end of the fan side filtering unit, the fan output unit is connected with the output end of the inversion side filtering unit, the signal output unit comprises an antenna interface and a communication interface, the antenna interface is connected with the communication monitoring module, the communication interface is connected with the main control module, and the unloading output unit is connected with an external unloading box.
Preferably, the communication interface comprises at least one of RS485, RS232 and RJ 45.
Preferably, a mounting rack is further arranged on the rear side of the case.
As above, the utility model discloses a wind power generation grid-connected inverter, the load simulator comprises a case, host system and with host system electric connection's rectification control module, contravariant control module and filter module, rectification control module and contravariant control module set up the upper portion space in quick-witted incasement side by side, filter module sets up the lower part space in quick-witted incasement, filter module is including the fan side filter unit and the contravariant side filter unit that set up side by side, wherein, fan side filter unit is close to rectification control module, contravariant side filter unit is close to contravariant control module, aerogenerator output current flows through fan side filter unit in proper order, rectification control module, contravariant control module and contravariant side filter unit. The utility model modularizes the components according to their functions and sets the unit modules according to the current direction order, so that the distance between adjacent components is small, the consumption of copper bars and cables is saved, and the material cost is reduced; the whole machine has compact structure, and the volume of the wind power generation grid-connected inverter is reduced; the filtering module is designed separately from the rectification control module and the inversion control module, so that electromagnetic interference is reduced; the heat dissipation fan uniformly disperses the heat generated by the rectification control module and the inversion control module into the whole case to prevent the power devices from being burnt due to overheating; meanwhile, the inductor with the larger inductance value in the rectification control module, the inversion control module and the filtering module can also be attached to a radiator, and the radiator is used for conducting heat to the outer side of the case. The waterproof diversion trench is matched with the sealing rubber strip and is used for forming a sealed cavity in the cabinet body when the front panel covers the front side of the cabinet body, so that the cabinet body is waterproof and dustproof; the main control module and the inversion control module are integrated on the same printed circuit board, the fan-side lightning protection unit is close to the fan-side filtering unit, and the network-side lightning protection unit is close to the inversion-side filtering unit, so that connecting wires are reduced, and the layout is compact; according to the principle of being close to, the manual switch button of the manual brake control unit is installed on the outer side of the bottom of the cabinet body, and the input and output module is arranged at the bottom of the cabinet body, so that wiring is convenient. The rear side of the case is provided with the mounting frame, so that the wind power generation grid-connected inverter can be conveniently and integrally hoisted.
Drawings
Fig. 1 shows a schematic structural diagram of a wind power generation grid-connected inverter according to an embodiment of the present invention.
Fig. 2 is a schematic view showing a three-dimensional structure of a wind power generation grid-connected inverter according to an embodiment of the present invention.
Fig. 3 is a schematic view showing a three-dimensional structure of a case according to an embodiment of the present invention.
Fig. 4 is a side view of a case structure according to an embodiment of the present invention.
Description of the element reference numerals
1. The intelligent anti-thunder and braking system comprises a case 2, a main control module 3, a rectification control module 4, an inversion control module 5, a filter module 51, a fan side filter unit 511, a three-phase output end inductor 52, an inversion side filter unit 521, a three-phase input end inductor 6, a heat radiation fan 7, a heat radiator 8, a heat radiation slot 9, a common mode inductor 10, a waterproof diversion trench 11, an auxiliary power supply 12, a communication monitoring module 13, a brake module 131, an automatic brake control unit 132, a manual brake control unit 1321, a manual brake control unit switch button 14, a lightning protection module 141, a fan side lightning protection unit 142, a grid side lightning protection unit 15, an input and output module 151, a fan input unit 152, a fan output unit 153, a signal output unit 1531, an antenna interface 1532, a communication interface 154, an unloading output unit 16, a grid-.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and although the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation, the form, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
Please refer to fig. 1 and fig. 2, the utility model provides a wind power generation grid-connected inverter, each part of converter is arranged in the independent quick-witted case 1 of a complete machine, each part divide into host system 2 and with host system 2 electric connection's rectification control module 3 according to the function, contravariant control module 4 and filter module 5, rectification control module 3 and contravariant control module 4 set up the upper portion space in quick-witted case 1 side by side, filter module 5 sets up the lower part space in quick-witted case 1, filter module 5 is including the fan side filter unit 51 and the contravariant side filter unit 52 that set up side by side, wherein, fan side filter unit 51 is close to rectification control module 3 and sets up, contravariant side filter unit 52 is close to contravariant control module 4 and sets up. In the figure of the embodiment, it is shown that the rectification control module 3 is located on the left side of the inversion control module 4, the fan-side filtering unit 51 is located below the rectification control module 3, and the inversion-side filtering unit 52 is located below the inversion control module 4. Of course, in other embodiments, the rectification control module 3 may also be interchanged with the inversion control module 4, and at this time, it should be ensured that the fan-side filtering unit 51 is still located below the rectification control module 3, and the inversion-side filtering unit 52 is still located below the inversion control module 4.
The current output by the wind driven generator is input into the wind power generation grid-connected inverter, the current sequentially flows through the fan side filtering unit 51, the rectification control module 3, the inversion control module 4 and the inversion side filtering unit 52, and the spatial layout of the functional modules is arranged according to the sequence of the current flowing direction, so that the distance between adjacent components is small, the using amount of copper bars and cables is saved, and the material cost is reduced; the whole machine has compact structure, and the volume of the wind power generation grid-connected inverter is reduced; meanwhile, the filtering module 5 is designed separately from the rectification control module 3 and the inversion control module 4, so that electromagnetic interference is reduced.
Because the power devices in the rectification control module 3 and the inversion control module 4 generate more heat in the working process, in an embodiment, at least one cooling fan 6 is arranged below the rectification control module 3 and the inversion control module 4, and the cooling fan 6 is used for uniformly dispersing the heat generated by the rectification control module 3 and the inversion control module 4 into the whole case 1 to prevent the power devices from being burnt due to overheating, so that the cooling capacity is improved.
Referring to fig. 3, as an example, the case 1 includes a cabinet body and a front panel (not shown), a heat sink 7 is installed at the rear side of the cabinet body, and the heat sink 7 is attached to the rectification control module 3 and the inversion control module 4 through a heat dissipation slot 8 opened at the rear side of the cabinet body, and is used for transferring heat dissipated by the rectification control module 3 and the inversion control module 4 to the outside of the case 1. One side of the radiator 7, which is in contact with the cabinet body, adopts heat-conducting silicone grease or a heat-conducting silicone sheet to transfer heat, one side of the radiator 7, which is opposite to the outside, is provided with heat-radiating fins, the radiator 7 is installed on the rear side of the cabinet body 1 through screws, and sealing rubber is arranged on the periphery of the heat-radiating slot 8 to prevent rainwater from permeating into the cabinet body 1.
As an example, the fan-side filter unit 51 has an LC (inductance-capacitance) structure, and the inverter-side filter unit 52 has an LCL (inductance-capacitance-inductance) structure, wherein the three-phase output inductor 511 in the fan-side filter unit 51 and the three-phase input inductor 521 in the inverter-side filter unit 52 are both attached to the heat sink 7 through the heat dissipation slot 8 opened on the rear side of the chassis 1. Since the inductance of the three-phase output terminal inductor 511 in the fan-side filter unit 51 and the inductance of the three-phase input terminal inductor 521 in the inverter-side filter unit 52 are relatively large, and accordingly, the heat generation amount is also large after the current passes through them, the two are also bonded to the heat sink 7 through the heat dissipation slot 8 to reduce the temperature in the case 1.
It is to be noted that if the wind turbine internal inductance is calculated, the wind turbine internal inductance and the fan-side filter unit 51 constitute an LCL (inductance-capacitance-inductance) structure as a whole.
As an example, the inverting side filtering unit 52 further includes a common mode inductor 9 connected in series.
Referring to fig. 4, as a preferred scheme, the front end surface of the cabinet body adopts an outward flanging structure to form a waterproof diversion trench 10, a sealing rubber strip (not shown) is arranged on the inner side of the front panel, the sealing rubber strip is matched with the waterproof diversion trench 10, and a sealed chamber is formed in the cabinet body when the front panel covers the front side of the cabinet body, so as to achieve the purposes of dust prevention and water prevention.
As an example, an auxiliary power supply 11 is further installed on the top side inside the enclosure 1 as a power supply for turning on each power switching device.
As an example, the wind power generation grid-connected inverter further includes a communication monitoring module 12, and the communication monitoring module 12 is connected with an external communication monitoring device for communication monitoring through at least one communication mode of ethernet, WIFI, GPRS and bluetooth.
As an example, the wind power generation grid-connected inverter further comprises a brake module 13, the brake module 13 is located in a lower space in the case 1 and is close to the rectification control module 3, and the brake module 13 is used for performing short-circuit braking on the three-phase output end of the fan in an emergency to brake the wind power generator.
As a preferred scheme, the brake module 13 comprises an automatic brake control unit 131 and a manual brake control unit 132 which are arranged up and down, and a switch button 1321 of the manual brake control unit is installed on the outer side of the bottom of the cabinet body, so that manual operation is facilitated. The automatic brake control unit 131 is connected to the main control module 2 and is controlled by an instruction sent by the main control module 2. In the circuit configuration, the manual brake control unit 132 is connected to the output terminal of the wind turbine, and the automatic brake control unit 131 is connected in parallel between the manual brake control unit 132 and the fan-side filter unit 51.
In order to save the internal space of the case 1, as an optimal scheme, the main control module 2 and the inverter control module 4 may be integrated on the same printed circuit board. The wind power generation grid-connected inverter also comprises an unloading control module (not shown), and the unloading control module and the rectification control module 3 are integrated and packaged in the same power module, so that the circuit is simplified, and the space is saved.
As an example, the wind power generation grid-connected inverter further includes a lightning protection module 14, the lightning protection module 14 is integrated with the filtering module 5 on the same printed circuit board, the lightning protection module 14 includes a fan-side lightning protection unit 141 and a grid-side lightning protection unit 142, the fan-side lightning protection unit 141 is close to the fan-side filtering unit 51, and the grid-side lightning protection unit 142 is close to the inverting-side filtering unit 52.
As an example, the wind power grid-connected inverter further includes a grid-connected switch 16, the grid-connected switch 16 and the lightning protection module 14 are integrated on the same printed circuit board with the filtering module 5, and the grid-connected switch 16 is used for closing when grid-connected to incorporate the current output by the inverter-side filtering unit 52 into the grid.
As an example, the wind power generation grid-connected inverter further includes an input/output module 15 disposed at the bottom of the chassis 1, and the input/output module 15 includes a fan input unit 151, a fan output unit 152, a signal output unit 153, and an unloading output unit 154; the fan input unit 151 is connected to an input end of the fan-side filtering unit 51, the fan output unit 152 is connected to an output end of the inverter-side filtering unit 52, the signal output unit 153 includes an antenna interface 1531 and a communication interface 1532, the antenna interface 1531 is connected to the communication monitoring module 12, the communication interface 1532 is connected to the main control module 2, and the unloading output unit 154 is connected to the external unloading box. And a waterproof joint is arranged at each wiring hole.
By way of example, the communication interface 1532 includes at least one of RS485, RS232, and RJ 45. As an example, the rear side of the chassis 1 is further provided with a mounting frame 17, which facilitates integral hoisting of the wind power generation grid-connected inverter.
To sum up, the utility model discloses a wind power generation grid-connected inverter, the load simulator comprises a case, host system and with host system electric connection's rectification control module, contravariant control module and filter module, rectification control module and contravariant control module set up the upper portion space in quick-witted incasement side by side, filter module sets up the lower part space in quick-witted incasement, filter module is including the fan side filter unit and the contravariant side filter unit that set up side by side, wherein, fan side filter unit is close to rectification control module, contravariant side filter unit is close to contravariant control module, aerogenerator output current flows through fan side filter unit in proper order, rectification control module, contravariant control module and contravariant side filter unit. The utility model modularizes the components according to their functions and sets the unit modules according to the current direction order, so that the distance between adjacent components is small, the consumption of copper bars and cables is saved, and the material cost is reduced; the whole machine has compact structure, and the volume of the wind power generation grid-connected inverter is reduced; the filtering module is designed separately from the rectification control module and the inversion control module, so that electromagnetic interference is reduced; the heat dissipation fan uniformly disperses the heat generated by the rectification control module and the inversion control module into the whole case to prevent the power devices from being burnt due to overheating; meanwhile, the inductor with the larger inductance value in the rectification control module, the inversion control module and the filtering module can also be attached to a radiator, and the radiator is used for conducting heat to the outer side of the case. The waterproof diversion trench is matched with the sealing rubber strip and is used for forming a sealed cavity in the cabinet body when the front panel covers the front side of the cabinet body, so that the cabinet body is waterproof and dustproof; the main control module and the inversion control module are integrated on the same printed circuit board, the fan-side lightning protection unit is close to the fan-side filtering unit, the network-side lightning protection unit is close to the inversion-side filtering unit, connecting wires are reduced, and the layout is compact; according to the principle of being close to, the manual switch button of the manual brake control unit is installed on the outer side of the bottom of the cabinet body, and the input and output module is arranged at the bottom of the cabinet body, so that wiring is convenient. The rear side of the case is provided with the mounting frame, so that the wind power generation grid-connected inverter can be conveniently and integrally hoisted. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (15)
1. The utility model provides a wind power generation grid-connected inverter, its characterized in that, including quick-witted case, host system and with host system electric connection's rectification control module, contravariant control module and filter module, rectification control module with contravariant control module set up side by side in the upper portion space of quick-witted incasement, filter module set up in the lower part space of quick-witted incasement, filter module is including the fan side filter unit and the contravariant side filter unit that set up side by side, wherein, fan side filter unit is close to rectification control module, contravariant side filter unit is close to contravariant control module.
2. The wind power generation grid-connected inverter according to claim 1, wherein at least one cooling fan is disposed below the rectification control module and the inversion control module, and is used for cooling the rectification control module and the inversion control module.
3. The wind power generation grid-connected inverter according to claim 1 or 2, wherein the case comprises a cabinet body and a front panel, a radiator is mounted at the rear side of the cabinet body, and the radiator is attached to the rectification control module and the inversion control module through a radiating groove formed in the rear side of the cabinet body and used for radiating the rectification control module and the inversion control module.
4. The wind power generation grid-connected inverter according to claim 3, wherein the fan-side filter unit has an LC structure, the inverter-side filter unit has an LCL structure, and a three-phase output end inductor in the fan-side filter unit and a three-phase input end inductor in the inverter-side filter unit are both attached to the heat sink through a heat dissipation slot opened on the rear side of the case.
5. The wind power generation grid-connected inverter according to claim 4, wherein the heat radiator and the cabinet body contact part transfer heat by using heat-conducting silicone grease or a heat-conducting silicone sheet.
6. The wind power generation grid-connected inverter according to claim 4 or 5, wherein the front end surface of the cabinet body is of an outward flanging structure to form a waterproof diversion trench, and a sealing rubber strip is arranged on the inner side of the front panel and is matched with the waterproof diversion trench for forming a sealed chamber in the cabinet body when the front panel covers the front side of the cabinet body.
7. The wind power grid-connected inverter according to claim 1, wherein an auxiliary power supply is installed on a top side of an inside of the case.
8. The wind power generation grid-connected inverter according to claim 1, further comprising a communication monitoring module, wherein the communication monitoring module is connected with an external communication monitoring device for communication monitoring through at least one communication mode of Ethernet, WIFI, GPRS and Bluetooth.
9. The wind power generation grid-connected inverter according to claim 1, further comprising a brake module, wherein the brake module is located in a lower space in the case and is close to the rectification control module, the brake module comprises an automatic brake control unit and a manual brake control unit which are arranged up and down, a switch button of the manual brake control unit is installed on the outer side of the bottom of the cabinet body, and the automatic brake control unit is connected with the main control module.
10. The wind power grid-connected inverter according to claim 1, wherein the main control module and the inversion control module are integrated on the same printed circuit board.
11. The wind power generation grid-connected inverter according to claim 1, further comprising an unloading control module, wherein the unloading control module and the rectifying control module are integrally packaged in the same power module.
12. The wind power generation grid-connected inverter according to claim 1, further comprising a lightning protection module, wherein the lightning protection module and the filtering module are integrated on the same printed circuit board, the lightning protection module comprises a fan-side lightning protection unit and a grid-side lightning protection unit, the fan-side lightning protection unit is close to the fan-side filtering unit, and the grid-side lightning protection unit is close to the inverting-side filtering unit.
13. The wind power generation grid-connected inverter according to claim 8, further comprising an input/output module disposed at the bottom of the case, wherein the input/output module comprises a fan input unit, a fan output unit, a signal output unit, and an unloading output unit; the fan input unit is connected with the input end of the fan side filtering unit, the fan output unit is connected with the output end of the inversion side filtering unit, the signal output unit comprises an antenna interface and a communication interface, the antenna interface is connected with the communication monitoring module, the communication interface is connected with the main control module, and the unloading output unit is connected with an external unloading box.
14. The wind power grid-connected inverter of claim 13, wherein the communication interface comprises at least one of RS485, RS232, and RJ 45.
15. The wind power grid-connected inverter according to claim 1, wherein a mounting frame is further provided at the rear side of the case.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019223627294 | 2019-12-25 | ||
| CN201922362729 | 2019-12-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211508888U true CN211508888U (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020302209.4U Active CN211508888U (en) | 2019-12-25 | 2020-03-12 | Wind power generation grid-connected inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211508888U (en) |
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2020
- 2020-03-12 CN CN202020302209.4U patent/CN211508888U/en active Active
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