Water-cooled frequency converter

Abstract

The utility model relates to the technical field of frequency conversion devices, and provides a water-cooled frequency converter, which comprises a box body, a capacitor module, a cooling fan assembly, a module to be water-cooled and a water-cooled radiator, the box body is provided with a containing cavity, the capacitor module, the cooling fan and the water cooling radiator are sequentially arranged in the containing cavity from top to bottom in the height direction of the box body, and the module to be subjected to water cooling is arranged on the water cooling radiator so as to exchange heat with the water cooling radiator. The capacitor module and the to-be-water-cooled module are vertically distributed in the box body so as to be reasonably partitioned, meanwhile, the water-cooled radiator can radiate heat of the to-be-water-cooled module, and meanwhile, air circulation in the containing cavity is achieved through the cooling fan assembly. The water-cooled frequency converter provided by the utility model is more reasonable in layout and lower in working temperature.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter technology, and in particular provides a water-cooled frequency converter. Background Technology

[0002] High-power frequency converters generate a certain amount of power consumption during operation, typically 3-5% of their capacity. Of this, phase-shifting transformers account for about 45%, rectification and inversion about 40%, and control systems, main circuit cables and copper busbars about 15%.

[0003] The main heat dissipation methods for high-power frequency inverters are natural cooling, forced air cooling, and water cooling. In China, forced air cooling is the mainstream method for high-power frequency inverters. However, with the continuous development of domestic frequency inverter technology and the increasing capacity of frequency inverters in recent years, forced air cooling is no longer sufficient to fully meet the heat dissipation requirements of high-power frequency inverters due to factors such as heat sink area, ambient temperature, the operating environment of the frequency inverter, and the size and noise of the fan.

[0004] Among the many factors affecting the reliability of high-power frequency converters, heat dissipation is crucial. The heat generated by high-power semiconductor devices and phase-shifting transformers during operation leads to an increase in device temperature. If appropriate heat dissipation measures are not taken to remove this heat in time, the device temperature may exceed the maximum allowable junction temperature, resulting in performance degradation or even damage. Therefore, selecting an appropriate heat dissipation method and implementing a reasonable design can effectively extend the service life of devices and is an indispensable and important aspect of improving the reliability of frequency converters. Utility Model Content

[0005] The purpose of this utility model is to provide a water-cooled frequency converter, which aims to solve the problem of unreasonable layout of existing water-cooled frequency converters.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This application provides a water-cooled frequency converter, including a housing, a capacitor module, a cooling fan assembly, a water-cooled module, and a water-cooled radiator. The housing has a receiving cavity, and the capacitor module, the cooling fan assembly, and the water-cooled radiator are sequentially arranged in the receiving cavity from top to bottom along the height direction of the housing. The water-cooled module is disposed on the water-cooled radiator to exchange heat with the water-cooled radiator.

[0008] The beneficial effects of this utility model are as follows: The water-cooled frequency converter provided by this utility model distributes the capacitor module and the module to be cooled by water vertically within the housing for reasonable partitioning. Simultaneously, the water-cooling radiator dissipates heat from the module to be cooled, and the cooling fan assembly facilitates airflow within the housing. The water-cooled frequency converter provided by this application has a more rational layout and operates at a lower temperature.

[0009] In some embodiments, the housing is provided with a plug-in slot, and the cooling fan assembly includes a bracket and a plurality of fan bodies erected on the bracket, the bracket being inserted into the plug-in slot.

[0010] In some embodiments, the water-cooled module includes an inverter module, a rectifier bridge, a contactor disposed on the rectifier bridge, and a buffer resistor, and the fan body is located between the inverter module and the rectifier bridge.

[0011] In some embodiments, the capacitor module includes a fixing plate, a plurality of capacitor bodies arranged in an array on the fixing plate, a positive capacitor busbar, a negative capacitor busbar, and a neutral capacitor busbar connected to the capacitor bodies, and a first insulating spacer covering the neutral capacitor busbar and a second insulating spacer covering the positive capacitor busbar; or,

[0012] The fixing plate is also provided with a voltage equalizing resistor; or...

[0013] The mounting plate is also provided with a capacitor cooling fan, which is disposed adjacent to the cooling fan assembly.

[0014] In some embodiments, the capacitor module further includes a capacitor negative support copper busbar and a capacitor positive support copper busbar arranged adjacent to each other, the capacitor negative support copper busbar and the capacitor positive support copper busbar being located on opposite sides of the capacitor body, respectively.

[0015] In some embodiments, the water-cooled frequency converter includes a 3-phase output basic copper busbar, a 3-phase output bridge copper busbar, a U-phase output raised copper busbar, a V-phase output raised copper busbar, a W-phase output raised copper busbar, a 3-phase input basic copper busbar, a rectifier positive copper busbar, a rectifier negative copper busbar, a T-phase input raised copper busbar, an S-phase input raised copper busbar, an R-phase input raised copper busbar, a rectifier negative input contactor copper busbar, an output contactor copper busbar, a rectifier absorption capacitor, an inverter absorption capacitor, a 3-phase output basic copper busbar sheet metal support bridge, a third insulating spacer, and a rectifier positive raised copper busbar.

[0016] In some embodiments, the water-cooled frequency converter further includes R-phase input copper busbar, S-phase input copper busbar, T-phase input copper busbar, positive 1 copper busbar, positive 2 copper busbar, U-phase output copper busbar, V-phase output copper busbar, W-phase output copper busbar, current sensor, input / output copper busbar plastic mounting base, W-phase current sensor mounting copper busbar, V-phase current sensor mounting copper busbar, U-phase current sensor mounting copper busbar, positive 1 and positive 2 shorting copper busbar, input / output copper busbar mounting sheet metal, and input / output wiring conversion copper busbar.

[0017] In some embodiments, the water-cooled frequency converter further includes an input / output module, an L-shaped negative copper busbar, a straight negative copper busbar, a fourth insulating spacer, an L-shaped positive copper busbar, a straight positive copper busbar, and a fifth insulating spacer.

[0018] In some embodiments, the accommodating cavity includes a first heat dissipation cavity and a second heat dissipation cavity communicating with the first heat dissipation cavity. The capacitor module is disposed in the first heat dissipation cavity, and the inverter module and the water-cooled module are disposed in the second heat dissipation cavity. Furthermore, the housing is equipped with an exhaust fan to allow external cold air to enter the first and second heat dissipation cavities; or...

[0019] The water-cooled inverter also includes a lifting ring on the enclosure, a PCB board, a sheet metal shielding plate, and a windproof epoxy board located in the second heat dissipation cavity.

[0020] In some embodiments, the enclosure includes an upper cover and a lower cover disposed opposite to each other, as well as an upper hanging plate and a lower hanging plate, and the enclosure is also provided with a handle and a grounding terminal. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 An exploded view of the water-cooled frequency converter provided in the embodiment of this utility model;

[0023] Figure 2 A schematic diagram of the capacitor module of the water-cooled frequency converter provided in this embodiment of the utility model;

[0024] Figure 3 A schematic diagram of the structure of the water-cooled frequency converter provided in the embodiment of this utility model;

[0025] Figure 4 Another structural schematic diagram of the water-cooled frequency converter provided in this embodiment of the utility model;

[0026] Figure 5 Another structural schematic diagram of the water-cooled frequency converter provided in an embodiment of this utility model;

[0027] Figure 6 A cross-sectional view of the water-cooled frequency converter provided in an embodiment of this utility model;

[0028] Figure 7 Other structural schematic diagrams of the water-cooled frequency converter provided in this embodiment of the utility model.

[0029] The following are the labeling elements in the figure:

[0030] 1. Capacitor module; 2. Inverter module; 3. Cooling fan assembly; 4. Rectifier bridge; 5. Buffer resistor; 6. Contactor; 7. Housing; 8. Water-cooled radiator; 9. Capacitor cooling fan; 11. Capacitor positive busbar; 12. Capacitor negative busbar; 13. Mounting plate; 15. Equalizing resistor; 16. Capacitor body; 17. Capacitor neutral busbar; 18. First insulating spacer; 19. Second insulating spacer; 21. Capacitor negative support busbar; 22. Capacitor positive support busbar; 23. 3-phase output basic busbar; 24. 3-phase output bridge 25. U-phase output raised copper busbar; 26. V-phase output raised copper busbar; 27. W-phase output raised copper busbar; 28. 3-phase input basic copper busbar; 29. ​​Rectifier positive copper busbar; 30. Rectifier negative copper busbar; 31. T-phase input raised copper busbar; 32. S-phase input raised copper busbar; 33. R-phase input raised copper busbar; 34. Rectifier negative input contactor copper busbar; 35. Output contactor copper busbar; 36. Rectifier absorption capacitor; 37. Inverter absorption capacitor; 38. Phase output basic copper busbar sheet metal support bridge; 40. Third insulating spacer; 41. Rectifier 42. R-phase input copper busbar; 43. S-phase input copper busbar; 44. T-phase input copper busbar; 45. Positive 1 copper busbar; 46. Positive 2 copper busbar; 47. U-phase output copper busbar; 48. V-phase output copper busbar; 49. W-phase output copper busbar; 50. Current sensor; 51. Input / output copper busbar plastic mounting base; 52. W-phase current sensor mounting copper busbar; 53. V-phase current sensor mounting copper busbar; 54. U-phase current sensor mounting copper busbar; 56. Positive 1 / Positive 2 short-circuit copper busbar; 57. Input / output copper busbar sheet metal mounting; 58. 59. Input / output wiring conversion copper busbar; 60. Input / output module; 61. L-shaped negative copper busbar; 62. Straight negative copper busbar; 63. Fourth insulating partition; 64. L-shaped positive copper busbar; 65. Straight positive copper busbar; 66. Fifth insulating partition; 67. Exhaust fan; 68. Lifting ring; 69. PCB board; 70. Sheet metal shielding plate; 71. First heat dissipation cavity; 72. Second heat dissipation cavity; 73. Windproof epoxy board; 74. Top cover; 75. Bottom cover; 76. Chassis handle; 77. Upper mounting plate; 78. Lower mounting plate; 79. Grounding terminal. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] Please refer to Figures 1 to 7 The present application provides a water-cooled frequency converter, including a housing 7, a capacitor module 1, a cooling fan assembly 3, a water-cooled module to be cooled, and a water-cooled radiator 8. The housing 7 has a receiving cavity, and the capacitor module 1, the cooling fan assembly 3, and the water-cooled radiator 8 are arranged sequentially from top to bottom in the receiving cavity along the height direction of the housing 7. The water-cooled module to be cooled is arranged on the water-cooled radiator 8 to exchange heat with the water-cooled radiator 8.

[0036] The water-cooled inverter provided by this utility model arranges the capacitor module 1 and the module to be cooled by water vertically within the housing 7 for reasonable partitioning. Simultaneously, the water-cooling radiator 8 dissipates heat from the module to be cooled, and the cooling fan assembly 3 facilitates airflow within the housing. The water-cooled inverter provided by this application has a more rational layout and operates at a lower temperature.

[0037] Please refer to Figures 1 to 7 In some embodiments, the housing 7 is provided with a plug-in slot, and the cooling fan assembly 3 includes a bracket and multiple fan bodies erected on the bracket.

[0038] Please refer to Figures 1 to 7 In some embodiments, the water-cooled module includes an inverter module 2, a rectifier bridge 4, a contactor 6 and a buffer resistor 5 disposed on the rectifier bridge 4, and the fan body is located between the inverter module 2 and the rectifier bridge 3.

[0039] Please refer to Figures 1 to 7 In some embodiments, the capacitor module 1 includes a fixing plate 13, a plurality of capacitor bodies 16 arranged in an array on the fixing plate 13, a positive female copper busbar 11, a negative female copper busbar 12, and a neutral female copper busbar 17 connected to the capacitor bodies 16, and a first insulating spacer 18 covering the neutral female copper busbar 17 and a second insulating spacer 19 covering the positive female copper busbar 11; or,

[0040] The fixing plate 13 is also provided with a voltage equalization resistor 15; or,

[0041] The fixed plate 13 is also equipped with a capacitor cooling fan 9, which is located adjacent to the cooling fan assembly 3.

[0042] Please refer to Figures 1 to 7 In some embodiments, the capacitor module 1 further includes a capacitor negative support copper busbar 21 and a capacitor positive support copper busbar 22 arranged adjacent to each other, with the capacitor negative support copper busbar 21 and the capacitor positive support copper busbar 22 located on opposite sides of the capacitor body 16, respectively.

[0043] Please refer to Figures 1 to 7 In some embodiments, the water-cooled frequency converter includes a 3-phase output basic copper busbar 23, a 3-phase output bridge copper busbar 24, a U-phase output riser copper busbar 25, a V-phase output riser copper busbar 26, a W-phase output riser copper busbar 27, a 3-phase input basic copper busbar 28, a rectifier positive copper busbar 29, a rectifier negative copper busbar 30, a T-phase input riser copper busbar 31, an S-phase input riser copper busbar 32, an R-phase input riser copper busbar 33, a rectifier negative input contactor copper busbar 34, an output contactor copper busbar 35, a rectifier absorption capacitor 36, an inverter absorption capacitor 37, a 3-phase output basic copper busbar sheet metal support bridge 38, a third insulating spacer 40, and a rectifier positive riser copper busbar 41.

[0044] Please refer to Figures 1 to 7 In some embodiments, the water-cooled frequency converter further includes R-phase input copper busbar 42, S-phase input copper busbar 43, T-phase input copper busbar 44, positive 1 copper busbar 45, positive 2 copper busbar 46, U-phase output copper busbar 47, V-phase output copper busbar 48, W-phase output copper busbar 49, current sensor 50, input / output copper busbar plastic mounting base 51, W-phase current sensor mounting copper busbar 52, V-phase current sensor mounting copper busbar 53, U-phase current sensor mounting copper busbar 54, positive 1 and positive 2 shorting copper busbar 56, input / output copper busbar mounting sheet metal 57, and input / output wiring conversion copper busbar 58.

[0045] Please refer to Figures 1 to 7 In some embodiments, the water-cooled inverter further includes an input / output module 59, an L-shaped negative copper busbar 60, a straight negative copper busbar 61, a fourth insulating partition 62, an L-shaped positive copper busbar 63, a straight positive copper busbar 64, and a fifth insulating partition 65.

[0046] Please refer to Figures 1 to 7 In some embodiments, the accommodating cavity includes a first heat dissipation cavity 70 and a second heat dissipation cavity 71 connected to the first heat dissipation cavity 70. The capacitor module 1 is disposed within the first heat dissipation cavity 70, and the inverter module 2 and the water-cooled module are disposed within the second heat dissipation cavity 71. Furthermore, the housing 7 is equipped with an exhaust fan 66 to allow external cold air to enter the first heat dissipation cavity 70 and the second heat dissipation cavity 71; or...

[0047] The water-cooled inverter also includes a lifting ring 67 on the enclosure 7, a PCB board 68 in the second heat dissipation cavity 71, a sheet metal shielding plate 69, and a windproof epoxy board 72.

[0048] Please refer to Figures 1 to 7 In some embodiments, the enclosure 7 includes an upper cover 73 and a lower cover 74 disposed opposite to each other, as well as an upper hanging plate 76 and a lower hanging plate 77. The enclosure 7 is also provided with a chassis handle 75 and a grounding terminal 78.

[0049] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water-cooled frequency converter, characterized by: The application relates to a water-cooled inverter, which comprises a box body, a capacitor module, a heat dissipation fan assembly, a water-cooled cooling module and a water-cooled radiator.

2. The water-cooled frequency inverter according to claim 1, characterized by: A plug-in groove is formed in the box body, and the heat dissipation fan assembly comprises a support and a plurality of fan bodies vertically arranged on the support, wherein the support is inserted into the plug-in groove.

3. The water-cooled frequency inverter according to claim 2, characterized by: The water-cooled cooling module comprises an inverter module, a rectifier bridge, a contactor and a buffer resistor arranged on the rectifier bridge, and the fan bodies are located between the inverter module and the rectifier bridge.

4. The water-cooled frequency inverter of claim 1, wherein: The capacitor module comprises a fixed plate, a plurality of capacitor bodies arranged in an array on the fixed plate, capacitor positive copper bars, capacitor negative copper bars and capacitor neutral copper bars connected to the capacitor bodies, and a first insulating spacer plate arranged on the capacitor neutral copper bars and a second insulating spacer plate arranged on the capacitor positive copper bars. The fixed plate is further provided with a voltage equalizing resistor. The fixed plate is further provided with a capacitor heat dissipation fan, which is arranged adjacent to the heat dissipation fan assembly.

5. The water-cooled frequency converter of claim 4, wherein: The capacitor module further comprises capacitor negative support copper bars and capacitor positive support copper bars arranged adjacent to each other, wherein the capacitor negative support copper bars and the capacitor positive support copper bars are respectively located on opposite sides of the capacitor bodies relative to the capacitor positive copper bars.

6. The water-cooled frequency converter of any one of claims 1 to 5, characterized in that: The water-cooled inverter further comprises R-phase input copper bars, S-phase input copper bars, T-phase input copper bars, positive one copper bars, positive two copper bars, U-phase output copper bars, V-phase output copper bars, W-phase output copper bars, current sensors, input-output copper bar plastic fixing seats, W-phase current sensor mounting copper bars, V-phase current sensor mounting copper bars, U-phase current sensor mounting copper bars, positive one positive two short-circuit copper bars, input-output copper bar mounting metal sheets and input-output wiring conversion copper bars.

7. The water-cooled frequency inverter according to claim 6, characterized by: The water-cooled inverter further comprises an input-output module, L-shaped negative copper bars, straight negative copper bars, a fourth insulating spacer plate, L-shaped positive copper bars, straight positive copper bars and a fifth insulating spacer plate.

8. The water-cooled frequency inverter according to claim 7, characterized by: The accommodating cavity comprises a first heat dissipation cavity and a second heat dissipation cavity communicated with the first heat dissipation cavity, the capacitor module is arranged in the first heat dissipation cavity, the inverter module and the water-cooled cooling module are arranged in the second heat dissipation cavity, and the box body is provided with an air suction fan to realize the entry of external cold air into the first heat dissipation cavity and the second heat dissipation cavity; or 9. The water-cooled frequency inverter of claim 3, wherein: ​ The water-cooled frequency converter further comprises a lifting ring arranged on the box body, a PCB board arranged in the second heat dissipation cavity, a metal plate shielding plate and a windproof epoxy plate.

10. The water-cooled frequency converter of any one of claims 1 to 8, wherein: The box body comprises oppositely arranged upper and lower covers, and upper and lower hanging plates, and further comprises a machine box handle and a grounding terminal.

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