Inverter with alternating current copper bar heat dissipation structure
By installing heat sinks on the copper busbars between the inverter's reactor and AC module, and employing multiple parallel designs and an L-shaped structure, the problem of poor heat dissipation of the copper busbars was solved, resulting in better heat dissipation and cost savings.
Patent Information
- Application Number
- CN202521001097.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-15
- Estimated Expiration
- 2035-05-20
AI Technical Summary
The heat dissipation effect of copper busbars in existing inverters is not ideal, which leads to increased temperature and risk of burnout, while also increasing the amount of copper busbars used and production costs.
Heat sinks are installed on the copper busbar between the inverter's reactor and AC module. Multiple parallel designs are used, combined with an L-shaped structure and multiple parallel connections, to increase the heat dissipation area and reduce contact resistance.
It effectively reduces the temperature of the copper busbar, avoids the risk of overheating and burning, saves copper material usage, reduces production costs, and improves heat dissipation efficiency.
Smart Images
Figure CN224249573U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic equipment technology, and in particular to an inverter with an AC copper busbar heat dissipation structure. Background Technology
[0002] An inverter is a device that reverses the operation of a rectifier (or inverter). It converts DC power into AC power by switching semiconductor switching devices (such as SCR, GTO, GTR, IGBT, and power MOSFET modules).
[0003] Inverters contain copper busbars used for transmitting electrical energy and control signals. These busbars connect various components within the inverter and significantly impact its conversion efficiency, stability, and durability. During inverter operation, current flows through the copper busbars, generating heat. If this heat is not dissipated promptly, the busbar temperature will rise, affecting transmission efficiency and posing a risk of burnout. Existing technologies employ methods such as increasing the contact area between copper busbars, increasing busbar thickness, or using multiple thin copper busbars with multi-faceted contact to reduce heat generation or improve heat dissipation, thereby lowering the busbar temperature. However, these methods increase the amount of copper used or complicate the manufacturing process, leading to increased costs, and the heat dissipation effect is not ideal. Utility Model Content
[0004] To address the above problems, this utility model provides an inverter with an AC copper busbar heat dissipation structure, comprising:
[0005] The reactor includes a reactor module, and the AC module includes an AC switch; the reactor module and the AC switch are connected via a first copper busbar; a heat sink is provided on the first copper busbar.
[0006] In some embodiments, the first copper busbar includes: a first connecting busbar, a first upper terminal clamping busbar, and a first lower terminal clamping busbar; heat sinks are respectively provided on the first connecting busbar, the first upper terminal clamping busbar, and the first lower terminal clamping busbar.
[0007] In some embodiments, one end of the first connecting bar is connected to the reactor module; one end of the first upper terminal clamp and the first lower terminal clamp are connected to the AC switch; and the other ends of the first connecting bar, the first upper terminal clamp, and the first lower terminal clamp are fixedly connected together.
[0008] In some embodiments, the first connecting bar has an L-shaped structure, and a heat sink is provided on the lower surface of the L-shaped corner.
[0009] In some embodiments, the AC switch includes a first tap, the lower surface of one end of the first upper terminal block is connected to the upper surface of the first tap, and the upper surface of the first lower terminal block is connected to the lower surface of the first tap; a heat sink is provided on the upper surface of one end of the first upper terminal block and a heat sink is provided on the lower surface of one end of the first lower terminal block.
[0010] In some embodiments, the reactor includes four reactor modules, and the AC module includes four AC switches; one reactor module is connected to one AC switch via three first copper busbars.
[0011] In some embodiments, the inverter further includes a busbar connected to an AC switch via a second copper busbar, on which a heat sink is provided.
[0012] In some embodiments, the second copper busbar includes a second upper terminal clamp and a second lower terminal clamp; one end of the second upper terminal clamp and one end of the second lower terminal clamp are connected to the AC switch; the other end of the second upper terminal clamp and the other end of the second lower terminal clamp are fixedly connected to the busbar, and a heat sink is provided on the outer surface of the other end of the second upper terminal clamp.
[0013] In some embodiments, the AC switch includes a second tap; the lower surface of one end of the second upper terminal block is in contact with the upper surface of the second tap, and the upper surface of one end of the second lower terminal block is in contact with the lower surface of the second tap; a heat sink is provided on the outer surface of one end of the second upper terminal block, and a heat sink is provided on the lower surface of one end of the second lower terminal block.
[0014] In some implementations, an AC switch is connected to three busbars via three second copper busbars, and each second copper busbar is connected to one busbar.
[0015] The present invention has at least one of the following beneficial effects: (1) Adding a heat sink to the copper busbar of the inverter provides better heat dissipation and effectively prevents overheating and burnout risks. (2) Using a heat sink to replace the existing heat dissipation method of increasing the volume and surface area of the copper busbar greatly saves copper usage and reduces production costs. (3) Placing the heat sink on the first copper busbar connecting the AC switch and the reactor module and / or the second copper busbar connecting the AC switch and the busbar provides better heat dissipation performance. (4) Using multiple first copper busbars or multiple second copper busbars connected in parallel can reduce contact resistance, reduce heat generation, and provide a larger heat dissipation area. Attached Figure Description
[0016] Figure 1A three-dimensional schematic diagram of the reactor module, AC switch, and connection via the first copper busbar provided in an embodiment of this utility model;
[0017] Figure 2 A perspective view of three first copper busbars provided for embodiments of this utility model;
[0018] Figure 3 for Figure 3 Top view of the three first copper bars;
[0019] Figure 4 A perspective view of an AC switch, busbar, and connection via a second copper busbar provided for an embodiment of this utility model;
[0020] Figure 5 A perspective view showing the connection between the three second copper busbars and the three busbars provided in this embodiment of the utility model;
[0021] Figure 6 A perspective view of the second copper busbar provided for an embodiment of this utility model;
[0022] Figure 7 A three-dimensional schematic diagram of the reactor, AC module (capacitor not shown), busbar and their connections provided for embodiments of this utility model;
[0023] Figure 8 for Figure 7 A schematic diagram of the structure from another direction;
[0024] Figure 9 A partial schematic diagram of the heat sink provided in an embodiment of this utility model;
[0025] In the diagram: 1-Reactor, 11-Reactor module, 21-AC switch, 211 first tap, 212 second tap, 213-Insulating plate, 3-First copper busbar, 31-First connecting busbar, 32-First upper terminal clamp, 33-First lower terminal clamp, 4-Heat sink, 5-Second copper busbar, 51-Second upper terminal clamp, 52-Second lower terminal clamp, 6-Busbar. Detailed Implementation
[0026] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0027] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" 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 the embodiments of 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 the embodiments of this utility model.
[0028] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0029] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.
[0030] This utility model discloses an inverter with an AC copper busbar heat dissipation structure to solve the cost problems caused by poor heat dissipation of copper busbars and large copper usage in existing inverters.
[0031] The inverter of this invention, which includes an AC copper busbar heat dissipation structure, comprises a reactor 1, an AC module, and a first copper busbar 3. (See also...) Figure 1 , Figure 7 The reactor 1 includes a reactor module 11, and the AC module includes an AC switch 21. The reactor module 11 and the AC switch 21 are connected by a first copper busbar 3. There can be one or more first copper busbars 3. A heat sink 4 is provided on the first copper busbar 21.
[0032] The various components of the inverter are connected by copper busbars or cables. When the inverter is working, a large amount of current flows through the connecting copper busbars, generating heat, especially the copper busbar between the inverter's reactor 1 and the AC module, which generates even more heat. In this application, a heat sink 4 is installed on the first copper busbar 3 connecting the reactor module 11 and the AC switch 21, which can effectively dissipate heat and avoid the risk of localized high temperatures and burnout caused by excessive heat.
[0033] One or more heat sinks 4 are provided on the first copper busbar 3. Preferably, heat sinks 4 are provided at the connection between the first copper busbar 21 and the reactor module 11, and at the connection between the first copper busbar 21 and the AC switch 21. The contact resistance at the connection is high, the local heat generated is higher, and the risk of burnout is also greater. Providing heat sinks at these locations can provide timely local heat dissipation.
[0034] Based on the above, as another specific embodiment, such as Figure 2 , Figure 3 The first copper busbar 3 includes: a first connecting busbar 31, a first upper terminal clamping busbar 32, and a first lower terminal clamping busbar 33. Heat sinks 4 are respectively provided on the first connecting busbar 31, the first upper terminal clamping busbar 32, and the first lower terminal clamping busbar 33.
[0035] Preferably, one end of the first connecting bar 31 is connected to the reactor module 11. One end of the first upper terminal bar 32 and the first lower terminal bar 33 are connected to the AC switch 21. The other ends of the first connecting bar 31, the first upper terminal bar 32, and the first lower terminal bar 33 are fixedly connected together.
[0036] Preferably, the first connecting row 31 is an L-shaped sheet, and a heat sink 4 is provided on the lower surface of the L-shaped corner.
[0037] In some specific embodiments, the AC switch 21 includes a first tap 211 ( Figure 4 The lower surface of one end of the first upper terminal clamp 32 is in contact with the upper surface of the first tap 211, and the upper surface of the first lower terminal clamp 33 is in contact with the lower surface of the first tap 211. In this way, the first upper terminal clamp 32 and the first lower terminal clamp 33 clamp the first tap 211 in the middle, forming a surface connection, which provides a larger contact area and a larger heat dissipation area. Preferably, a heat sink 4 is provided on the upper surface of one end of the first upper terminal clamp 32, and a heat sink 4 is provided on the lower surface of one end of the first lower terminal clamp 33. Figure 2 ).
[0038] In some specific embodiments, a reactor module 11 is connected to an AC switch 21 via a plurality of first copper busbars 3. Preferably, a reactor module 11 is connected to an AC switch 21 via three first copper busbars 3.
[0039] like Figure 4 , Figure 5 The inverter of this invention, which includes an AC copper busbar heat dissipation structure, also includes a busbar 6. The busbar 6 is connected to the AC switch 21 via a second copper busbar 5, on which a heat sink 4 is installed. There can be one or more second copper busbars 5. When the inverter is working, the AC power in the AC module flows to the busbar 6 through the second copper busbar 5. The second copper busbar 5 generates a relatively high amount of heat, requiring effective heat dissipation; the heat sink meets this requirement.
[0040] like Figure 4 , Figure 5 , Figure 6The second copper busbar 5 includes a second upper terminal clamp 51 and a second lower terminal clamp 52. One end of the second upper terminal clamp 51 and one end of the second lower terminal clamp 52 are connected to the AC switch 21. The other ends of the second upper terminal clamp 51 and the second lower terminal clamp 52 are fixedly connected to the busbar 6. A heat sink 4 is provided on the outer surface of the other end of the second upper terminal clamp 51. The inner surface of the second upper terminal clamp 51 is in contact with the surface of the second lower terminal clamp 52, and the other side surface of the second lower terminal clamp 52 is in contact with the busbar 6. The three components can be fixed together by screws.
[0041] In some specific embodiments, the AC switch 21 includes a second tap 212. The lower surface of one end of the second upper terminal block 51 is in contact with the upper surface of the second tap 212, and the upper surface of one end of the second lower terminal block 52 is in contact with the lower surface of the second tap 212. A heat sink is provided on the outer surface of one end of the second upper terminal block 51, and a heat sink is provided on the lower surface of one end of the second lower terminal block 52.
[0042] Based on the above, the structure of the second copper busbar 5 and its connection arrangement between the AC switch 21 and the busbar 6 provide a larger contact area at the connection points and a greater spatial distance between each connection point. This effectively utilizes space, which is beneficial for the miniaturization of the inverter. At the same time, each connection point also has sufficient heat dissipation space, and with the help of the heat sink, local overheating can be avoided.
[0043] In some specific embodiments, an AC switch 2 is connected to multiple busbars 5 via multiple second copper busbars 5, and one second copper busbar 2 is connected to one busbar 5. Preferably, the AC switch 2 is connected to three busbars 5 via three second copper busbars 5.
[0044] In some specific embodiments, such as Figure 7 , Figure 8The reactor 1 of the inverter with AC copper busbar heat dissipation structure of this utility model includes four reactor modules 11 and four AC modules (capacitors are not shown in the figure). Each AC module includes an AC switch 21. A reactor module 21 and an AC switch 21 are connected by three parallel first copper busbars 3. Each AC switch 21 has three first taps 211 and three second taps 212. Each first tap 211 is located above each second tap 212, and an insulating plate 213 is placed between two first taps 211 (including the corresponding second taps 212). Each AC switch 21 is connected to three busbars 6 by three second copper busbars 5, and each second copper busbar 5 is connected to one busbar 6. This modular design, with each module connected by copper busbars, makes the overall structure more stable, the spatial layout more reasonable, and further improves heat dissipation efficiency. Of course, the number and structure of the reactor module 11, AC switch 21, first copper busbar 1, tap, second copper busbar 5, busbar 6, etc. of this utility model can be adjusted according to specific needs.
[0045] It should be noted that the structures of the various first copper busbars 3 may differ to some extent, such as Figure 2 , Figure 3 The first copper busbars 3 located on both sides have a symmetrical structure. The other end of the first upper terminal block clamp 32 connecting the first tap 211 of the AC switch 21 has a larger surface area, while the other end of the first upper terminal block clamp 32 connecting the first tap 211 of the AC switch 21 in the middle has a relatively smaller surface area. This makes better use of space and gives the copper busbars a larger heat dissipation area. The structures of the various second copper busbars 5 can also vary to some extent, such as... Figure 5 The three second copper busbars 5 are arranged in a staggered manner in the vertical direction, which makes fuller use of space and has a larger heat dissipation area.
[0046] In some specific embodiments, such as Figure 9 This invention provides an improved heat sink 4 and a portion thereof. The heat sink 4 is a multi-finned heat sink structure, preferably made of aluminum. Using aluminum saves costs and provides good heat conduction and dissipation. Of course, other materials with similar characteristics can also be used. The structure or material of the heat sink 4 at various locations of the inverter with AC copper busbar heat dissipation structure of this invention can be the same or different. For example, the size, number of heat sinks, and material of the heat sink 4 can be adjusted according to the characteristics of each location to meet the heat dissipation requirements of that location.
[0047] It should be noted that this utility model demonstrates the installation of heat sinks on the connecting copper busbars of the inverter's reactor and AC module. Besides these locations, the inverter of this utility model also includes other structures such as IGBT modules, and similar heat sinks can also be installed on the connecting copper busbars of other structures.
[0048] In summary, this utility model provides an inverter with an AC copper busbar heat dissipation structure. Heat sinks are installed on the connecting copper busbars at the reactor and AC module of the inverter, enabling effective heat dissipation in key heat-generating areas while significantly reducing costs. As a better option, this utility model employs a multiple parallel design for the connecting copper busbars, resulting in a rational structure and spatial layout, further reducing heat generation, increasing heat dissipation, and reducing copper usage.
[0049] For those skilled in the art, based on the ideas of the embodiments of this utility model, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. An inverter with an AC copper busbar heat dissipation structure, characterized in that, include: The reactor includes a reactor module, and the AC module includes an AC switch; the reactor module and the AC switch are connected via a first copper busbar; a heat sink is provided on the first copper busbar.
2. The inverter as described in claim 1, characterized in that, The first copper busbar includes: a first connecting busbar, a first upper terminal clamping busbar, and a first lower terminal clamping busbar; heat sinks are respectively provided on the first connecting busbar, the first upper terminal clamping busbar, and the first lower terminal clamping busbar.
3. The inverter as described in claim 2, characterized in that, One end of the first connecting bar is connected to the reactor module; one end of the first upper terminal clamp and the first lower terminal clamp are connected to the AC switch; the other ends of the first connecting bar, the other ends of the first upper terminal clamp and the other ends of the first lower terminal clamp are fixedly connected together.
4. The inverter as described in claim 2, characterized in that, The first connecting bar has an L-shaped structure, and a heat sink is provided on the lower surface of its L-shaped corner.
5. The inverter as described in claim 3, characterized in that, The AC switch includes a first tap, the lower surface of one end of the first upper terminal block is connected to the upper surface of the first tap, and the upper surface of the first lower terminal block is connected to the lower surface of the first tap; a heat sink is provided on the upper surface of one end of the first upper terminal block and a heat sink is provided on the lower surface of one end of the first lower terminal block.
6. The inverter as described in any one of claims 1-5, characterized in that, The reactor includes four reactor modules, and the AC module includes four AC switches; one reactor module and one AC switch are connected through three first copper busbars.
7. The inverter as described in claim 1, characterized in that, The inverter also includes a busbar, which is connected to the AC switch via a second copper busbar, on which a heat sink is provided.
8. The inverter as described in claim 7, characterized in that, The second copper busbar includes a second upper terminal clamp and a second lower terminal clamp; one end of the second upper terminal clamp and one end of the second lower terminal clamp are connected to the AC switch; the other end of the second upper terminal clamp and the other end of the second lower terminal clamp are fixedly connected to the busbar, and a heat sink is provided on the outer surface of the other end of the second upper terminal clamp.
9. The inverter as described in claim 8, characterized in that, The AC switch includes a second tap; the lower surface of one end of the second upper terminal block is connected to the upper surface of the second tap, and the upper surface of one end of the second lower terminal block is connected to the lower surface of the second tap; a heat sink is provided on the outer surface of one end of the second upper terminal block, and a heat sink is provided on the lower surface of one end of the second lower terminal block.
10. The inverter as described in any one of claims 7-9, characterized in that, An AC switch is connected to three busbars via three second copper busbars, and each second copper busbar is connected to one busbar.