Low resistance stator structure and brushless motor

Abstract

The utility model relates to a motor, a low resistance stator structure and brushless motor include: copper terminal block, three -phase coil and three -phase copper row, copper terminal block with first end connection of three -phase coil, the horizontal height of its connection position is lower than the horizontal height of copper terminal block body, the connection position of copper terminal block is close to first end setting of three -phase coil. The utility model discloses through setting copper terminal block, three -phase coil and three -phase copper row, and the horizontal height of copper terminal block's connection position is set to be lower than the horizontal height of copper terminal block body, compared with the copper terminal block of even formula, the copper terminal block of the application has greater cross -sectional area of copper row, increases the heat dissipation area, and reserves the winding space, can effectively reduce the motor internal resistance, reduces the internal heat generation, enhances the motor performance, improves the motor work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a low-resistance stator structure and a brushless motor. Background Technology

[0002] The RC model car market is a vibrant and continuously growing segment, encompassing diverse needs from entry-level recreational products to high-end racing cars. In recent years, advancements in electronics, battery performance, and materials science have significantly improved the speed, handling, and realism of RC models, attracting more enthusiasts. Future trends may lean towards intelligent, environmentally friendly power systems and immersive experiences. While high entry costs and venue limitations remain obstacles to the industry's expansion, the offline experience economy, racing culture, and continued technological democratization are continuously injecting strong momentum into the market, propelling this blue ocean towards a more disruptive future.

[0003] However, in existing motors, the internal rotation of the stator assembly is relatively large, resulting in high coil temperatures during motor operation, which reduces motor efficiency and affects the overall performance of the motor. Summary of the Invention

[0004] The purpose of this invention is to provide a low-resistance stator structure and a brushless motor to solve the problems mentioned in the background art. By adopting the above technical solution, without changing the motor structure, the lead-out length of the copper wire is shortened and the cross-sectional area of ​​the copper busbar is increased, thereby reducing the internal resistance of the motor stator assembly and improving the motor's working efficiency and overall performance.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A low-resistance stator structure includes: a copper terminal block, three-phase coils, and three-phase copper busbars. The copper terminal block is connected to the first end of the three-phase coil, and the horizontal height of its connection position is lower than the horizontal height of the copper terminal block body. The connection position of the copper terminal block is set close to the first end of the three-phase coil. Two of the three-phase copper busbars have extended protrusions, each of which has a welding port. The other copper busbar of the three-phase copper busbar has a welding boss. The two extended protrusions and the welding boss are respectively connected to the second end of the three-phase coil.

[0006] In one embodiment, the copper terminal block includes a terminal block body and a plurality of protrusions. The terminal block body has a plurality of welding holes, and each of the protrusions is disposed on the welding hole. Each of the protrusions is used to connect to the first end of the three-phase coil.

[0007] In one embodiment, the copper terminal block includes three protrusions, and the terminal block body has three welding holes, with the three protrusions respectively disposed on the three welding holes.

[0008] In one embodiment, the horizontal height of each of the welding holes is lower than the horizontal height of the board body.

[0009] In one embodiment, the three-phase copper busbar includes an A-phase copper busbar, a B-phase copper busbar, and a C-phase copper busbar. The A-phase copper busbar and the C-phase copper busbar each have a bent extension protrusion. The welding joint on the extension protrusion is located close to the three-phase coil. The B-phase copper busbar is provided with a welding boss.

[0010] In one embodiment, insulating paper is further included, which is disposed between the copper terminal block and the three-phase coil.

[0011] In one embodiment, the system further includes a PCB board connected to the three-phase copper busbar by rivets.

[0012] In one embodiment, a housing is also included, which is fitted over the three-phase coil.

[0013] In one embodiment, the copper terminal block has a wraparound, wave-shaped structure.

[0014] This utility model also discloses a brushless motor, including the low-resistance stator structure described above.

[0015] Compared with the prior art, the present invention has at least the following advantages: This utility model relates to a low-resistance stator structure and a brushless motor. By setting a copper terminal block, three-phase coils, and three-phase copper busbars, and setting the horizontal height of the connection position of the copper terminal block to be lower than the horizontal height of the copper terminal block body, compared with the existing flat copper terminal block, the copper terminal block of this application has a larger cross-sectional area of ​​copper busbars, increases the heat dissipation area, and reserves winding space, thereby effectively reducing the internal resistance of the motor, reducing internal heat generation, enhancing motor performance, and improving motor working efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a low-resistance stator structure and a brushless motor according to one embodiment. Figure 2 This is a schematic diagram of the structure of a brushless motor according to one embodiment; Figure 3 for Figure 1 A schematic diagram of a copper terminal block for a low-resistance stator structure is shown. Figure 4 for Figure 3A schematic diagram of a copper terminal block for a low-resistance stator structure is shown. Figure 5 for Figure 1 The diagram shows a three-phase copper busbar structure with low resistance. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0018] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" 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 component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0019] In the stator assembly, the cross-sectional area of ​​the copper wire is much smaller than that of the copper busbar. It is known that the resistance (R) is inversely proportional to the cross-sectional area (A) of the copper wire (the larger the area, the smaller the resistance). Therefore, to reduce the resistance, the length of the copper wire should be minimized and the cross-sectional area of ​​the copper busbar should be increased as much as possible.

[0020] Please see Figures 1-5 A low-resistance stator structure includes: a copper terminal block 100, three-phase coils 200, and three-phase copper busbars 300; it also includes insulating paper 400, a PCB board 500, and a housing 600. The insulating paper is disposed between the copper terminal block and the three-phase coils. The PCB board is connected to the three-phase copper busbars by rivets. The housing is fitted over the three-phase coils.

[0021] The copper terminal block is connected to the first end of the three-phase coil, and the horizontal height of its connection point is lower than the horizontal height of the copper terminal block body. The connection point of the copper terminal block is located close to the first end of the three-phase coil. It should be noted that... (See also...) Figure 4The copper terminal block has three planes. The uppermost projection plane of the main body is plane AA, the projection plane of the port connected to the three-phase coil is plane CC, and the projection plane of the end face of the copper terminal block away from the three-phase coil is plane BB. The planes AA, BB and CC are at different heights. Plane CC is the plane closest to the connection end of the three-phase coil. Plane BB is the lowest point of the welding hole that can be set and is also the second closest to the connection end of the three-phase coil. Plane AA is designed to accommodate the coil protrusion and is therefore higher than the other two planes.

[0022] Please see Figure 2 Two of the three-phase copper busbars 300 have extended protrusions 310, each of which has a weld joint 311. The other copper busbar of the three-phase copper busbar has a weld protrusion 320. The two extended protrusions 310 and the weld protrusion 320 are respectively connected to the second end of the three-phase coil.

[0023] Thus, by setting up a copper terminal block, three-phase coils, and three-phase copper busbars, and setting the horizontal height of the connection position of the copper terminal block to be lower than the horizontal height of the copper terminal block body, compared with the existing flat copper terminal block, the copper terminal block of this application has a larger cross-sectional area of ​​copper busbars, increases the heat dissipation area, and reserves winding space, thereby effectively reducing the internal resistance of the motor, reducing internal heat generation, enhancing motor performance, and improving motor working efficiency.

[0024] Please see Figure 2 and Figure 4 The three-phase copper busbar 300 includes an A-phase copper busbar 301, a B-phase copper busbar 302, and a C-phase copper busbar 303. The A-phase copper busbar and the C-phase copper busbar each have a bent extension protrusion. The welding joint on the extension protrusion is located close to the three-phase coil. The B-phase copper busbar is provided with a welding protrusion.

[0025] Furthermore, this invention redesigns the copper busbar structure without altering the stator assembly structure. The copper terminal block is designed with a wave-like shape, with the wire bonding interface at the bottom of the wave and the boss protruding downwards. The wire bonding interface of phase A copper busbar extends downwards, as do the bosses of phase B and phase C copper busbars. By reducing the distance between the copper terminal block and the stator output terminals of the three phases (A, B, and C) copper busbars, the output length of the copper wires is indirectly reduced, thereby lowering the stator internal resistance.

[0026] Please see Figure 2 and Figure 3The copper terminal block 100 includes a terminal block body 110 and a plurality of protrusions 120. The terminal block body 110 has a plurality of welding holes 111. Each of the protrusions 120 is respectively disposed on each of the welding holes, and each of the protrusions is used to connect to the first end of the three-phase coil.

[0027] Please see Figure 3 The copper terminal block includes three protruding posts, and the terminal block body has three welding holes 121. The three protruding posts are respectively disposed on the three welding holes. In this embodiment, the horizontal height of each welding hole is lower than the horizontal height of the terminal block body, so that the welding hole is closer to the three-phase coil.

[0028] In this embodiment, the copper terminal block has a wraparound, wave-shaped structure. Simultaneously, due to the wave-like shape of the copper terminal block, the ABC three-phase copper busbars extend downwards, increasing the contact area with air. Without altering the original structure, compared to the original structure, the heat dissipation area is increased by 10%, accelerating heat dissipation and effectively reducing the coil temperature of the motor. Compared to the original copper terminal block structure, the new copper terminal block is 47% lighter, and compared to the original copper busbar structure, the new copper busbar is 48% lighter.

[0029] This utility model also discloses a brushless motor, including the low-resistance stator structure described above. A copper terminal block and the stator core are coaxially assembled. Insulating paper is attached to the reverse side of the copper terminal block for insulation. Copper wires are connected to the copper terminal block by solder. The ABC three-phase copper busbars and the PCB board are fixed by rivets and coaxially assembled with the stator core and the housing. Copper wires are connected to the ABC three-phase copper busbars by solder.

[0030] The copper terminal block's solder joint extends downwards, and the boss length is extended to minimize the copper wire length. The solder joints of phases A and C extend downwards, and the boss of phase B's solder joint extends downwards to minimize the copper wire length. The above-mentioned copper terminal block and copper busbar structure can significantly reduce the stator's internal resistance and reduce the weight of parts, achieving lightweight design.

[0031] The copper terminal block and the ABC three-phase copper busbars reduce the distance to the stator output terminals, indirectly reducing the output length of the copper wires and thus reducing the internal resistance of the stator. The copper terminal block is designed with a wave-like shape to increase the heat dissipation area and reserve space for winding, taking into account both conductivity and heat dissipation.

[0032] Please see Figure 2 The brushless motor further includes a front cover assembly 700 and a rear cover assembly 800, which are respectively disposed on the housing.

[0033] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A low-resistance stator structure, characterized in that, include: Copper terminal block, three-phase coil and three-phase copper busbar, The copper terminal block is connected to the first end of the three-phase coil, and the horizontal height of its connection position is lower than the horizontal height of the copper terminal block body. The connection position of the copper terminal block is set close to the first end of the three-phase coil. Two of the three-phase copper busbars have extended protrusions, each of which has a welding port. The other copper busbar of the three-phase copper busbar has a welding boss. The two extended protrusions and the welding boss are respectively connected to the second end of the three-phase coil.

2. The low-resistance stator structure according to claim 1, characterized in that, The copper terminal block includes a terminal block body and multiple protrusions. The terminal block body has multiple welding holes, and each protrusion is disposed on the welding hole. Each protrusion is used to connect to the first end of the three-phase coil.

3. A low-resistance stator structure according to claim 2, characterized in that, The copper terminal block includes three protrusions, and the terminal block body has three welding holes, with the three protrusions respectively disposed on the three welding holes.

4. A low-resistance stator structure according to claim 2, characterized in that, The horizontal height of each of the welding holes is lower than the horizontal height of the wire plate body.

5. A low-resistance stator structure according to claim 1, characterized in that, The three-phase copper busbar includes an A-phase copper busbar, a B-phase copper busbar, and a C-phase copper busbar. The A-phase copper busbar and the C-phase copper busbar each have a bent extension protrusion. The welding joint on the extension protrusion is located close to the three-phase coil. The B-phase copper busbar is provided with a welding protrusion.

6. A low-resistance stator structure according to claim 1, characterized in that, It also includes insulating paper, which is disposed between the copper terminal block and the three-phase coil.

7. A low-resistance stator structure according to claim 1, characterized in that, It also includes a PCB board, which is connected to the three-phase copper busbar by rivets.

8. A low-resistance stator structure according to claim 1, characterized in that, It also includes a housing, which is fitted over the three-phase coil.

9. A low-resistance stator structure according to claim 1, characterized in that, The copper terminal block has a wraparound, wave-shaped structure.

10. A brushless motor, characterized in that, Including the low-resistance stator structure as described in any one of claims 1 to 9.

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