Oil-cooled flat wire stator

Abstract

The utility model discloses an oil cooling flat wire stator contains first center stator core, and the left and right sides of first center stator core are equipped with second stator core, and the outside of second stator core is equipped with third stator core, and first center stator core, second stator core and third stator core concentricity are arranged, and the circumference of first center stator core is distributed with a plurality of first stator oil passageway, and the circumference of second stator core is distributed with a plurality of second stator oil passageway, and the circumference of third stator core is distributed with a plurality of third stator oil passageway, and first stator oil passageway and corresponding second stator oil passageway, third stator oil passageway constitute the heat dissipation oil channel, wherein, second stator oil passageway and third stator oil passageway form the ladder structure in the radial direction. Second stator oil passageway and third stator oil passageway form the ladder structure in the radial direction, realize the all -round coverage of cooling oil to the core slot wall, flat wire crown end and the welding end wire package, avoid partial overheating, and the heat dissipation area is uniform.

Description

Technical Field

[0001] This utility model relates to an electric motor, and more specifically, to an oil-cooled flat wire stator. Background Technology

[0002] The popularization of electrification in the commercial vehicle market, especially in the heavy-duty truck sector, is gradually increasing. The trend of new energy replacing traditional engines is gradually increasing. Whether it is a hybrid model or a pure electric model, the motor stator generally uses copper round wire winding, and the slot fill factor is not high. Although passenger cars use flat wire winding for industrial automation, the torque is generally small. At present, the demand for high speed, lightweight, high torque, high efficiency and short space in heavy-duty trucks has made the development of new oil-cooled flat wire stators suitable for the heavy-duty truck market a top priority for the technological research and development of major motor manufacturers. Utility Model Content

[0003] Therefore, it is necessary to provide an oil-cooled flat wire stator to address the aforementioned technical problems.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An oil-cooled flat wire stator is characterized in that it comprises a first central stator core, second stator cores on both the left and right sides of the first central stator core, and third stator cores on the outer sides of the second stator cores. The first central stator core, second stator cores, and third stator cores are concentrically arranged. A plurality of first stator oil channels are distributed circumferentially on the first central stator core, a plurality of second stator oil channels are distributed circumferentially on the second stator cores, and a plurality of third stator oil channels are distributed circumferentially on the third stator cores. The first stator oil channels, together with their corresponding second and third stator oil channels, constitute heat dissipation oil channels. The second stator oil channel and the third stator oil channel form a stepped structure in the radial direction.

[0005] In a preferred embodiment of the present invention, the first stator oil channel, the second stator oil channel, and the third stator oil channel are arranged along the axial direction of the first central stator core.

[0006] In a preferred embodiment of this utility model, the center distance of the second stator oil channel is greater than that of the third stator oil channel.

[0007] In a preferred embodiment of this utility model, the first stator oil channel has a "V"-shaped opening, and the second and third stator oil channels are both through-hole elongated holes. Compared with the prior art, the present invention has the following beneficial effects: This invention provides an oil-cooled flat wire stator. The second and third stator oil channels form a stepped structure in the radial direction, achieving comprehensive coverage of the cooling oil on the core slot walls, the flat wire crown end, and the welded end coil, preventing localized overheating, ensuring uniform heat dissipation, and providing excellent performance. Furthermore, the "V"-shaped opening of the first stator oil channel increases the cooling oil flow rate, disrupts the laminar flow state of the oil, increases the Reynolds number in the oil flow, and improves heat dissipation efficiency, ensuring effective heat dissipation. Simultaneously, the "V"-shaped opening design minimizes the removal of core material, reducing the impact on electromagnetic performance. Attached Figure Description

[0008] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0009] Figure 1 This is a three-dimensional structural diagram of the oil-cooled flat wire stator of this utility model. Figure 2 for Figure 1 An exploded view of the three-dimensional structure of the oil-cooled flat wire stator in China; Figure 3 for Figure 2 A magnified view of the details of region A in the diagram; Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure of an oil-cooled flat wire stator; Figure 5 This is a magnified view of the details of region B in Figure 4; The markings in the diagram are explained as follows: 1. First central stator core; 10. First stator oil channel; 2. Second stator core; 20. Second stator oil channel; 3. Third stator core; 30. Third stator oil channel; S. Heat dissipation oil channel. Detailed Implementation

[0010] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0011] like Figures 1 to 5As shown, the oil-cooled flat wire stator includes a first central stator core 1, with second stator cores 2 on both the left and right sides of the first central stator core 1, and third stator cores 3 on the outer sides of the second stator cores 2. The first central stator core 1, the second stator core 2, and the third stator core 3 are concentrically arranged. The first central stator core 1 has a plurality of first stator oil channels 10 distributed in the circumferential direction, the second stator core 2 has a plurality of second stator oil channels 20 distributed in the circumferential direction, and the third stator core 3 has a plurality of third stator oil channels 30 distributed in the circumferential direction. The first stator oil channels 10 and the corresponding second stator oil channels 20 and third stator oil channels 30 constitute a heat dissipation oil channel S.

[0012] The second stator oil channel 20 and the third stator oil channel 30 form a stepped structure in the radial direction.

[0013] It should be noted that the first stator oil channel 10, the second stator oil channel 20 and the third stator oil channel 30 are arranged along the axial direction of the first central stator core 1.

[0014] In addition, the center distance of the second stator oil channel 20 is greater than that of the third stator oil channel 30.

[0015] like Figure 3 As shown, the first stator oil channel 10 has a "V"-shaped opening, and the second stator oil channel 20 and the third stator oil channel 30 are both through-hole elongated oval holes.

[0016] The working principle of this oil-cooled flat wire stator is explained below.

[0017] like Figure 5 As shown, the cooling oil enters the first stator oil channel 10 of the first central stator core 1 according to arrow F, then enters the second stator oil channel 20, and then the third stator oil channel 30. Since the center distance of the second stator oil channel 20 is greater than that of the third stator oil channel 30, the second stator oil channel 20 and the third stator oil channel 30 form a stepped structure in the radial direction, achieving comprehensive coverage of the core slot wall, the flat wire crown end, and the welded end coil by the cooling oil. This avoids localized overheating, ensures uniform heat dissipation, and achieves excellent results.

[0018] Furthermore, the "V"-shaped opening of the first stator oil channel 10 increases the flow rate of the cooling oil, disrupts the laminar flow state of the oil, increases the Reynolds number in the oil flow, improves heat dissipation efficiency, and ensures heat dissipation effect. At the same time, the "V"-shaped opening design minimizes the removal of core material and reduces the impact on electromagnetic performance.

[0019] Obviously, the embodiments described above are only some embodiments of this application, and not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application.

Claims

1. An oil-cooled flat wire stator, characterized in that, The oil-cooled flat wire stator includes a first central stator core (1), with second stator cores (2) on both the left and right sides of the first central stator core (1) and third stator cores (3) on the outer sides of the second stator cores (2). The first central stator core (1), second stator cores (2) and third stator cores (3) are concentrically arranged. The first central stator core (1) has several first stator oil channels (10) distributed in the circumferential direction. The second stator core (2) has several second stator oil channels (20) distributed in the circumferential direction. The third stator core (3) has several third stator oil channels (30) distributed in the circumferential direction. The first stator oil channels (10) and the corresponding second stator oil channels (20) and third stator oil channels (30) constitute heat dissipation oil channels (S). The second stator oil channel (20) and the third stator oil channel (30) form a stepped structure in the radial direction.

2. The oil-cooled flat wire stator according to claim 1, characterized in that, The first stator oil channel (10), the second stator oil channel (20) and the third stator oil channel (30) are arranged along the axial direction of the first central stator core (1).

3. The oil-cooled flat wire stator according to claim 1, characterized in that, The center distance of the second stator oil channel (20) is greater than that of the third stator oil channel (30).

4. The oil-cooled flat wire stator according to claim 1, characterized in that, The first stator oil channel (10) has a "V" shaped opening, and the second stator oil channel (20) and the third stator oil channel (30) are both through-hole elongated holes.

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