Stator cooling system structure
By setting up a stacked core punch and multiple cooling tanks on the motor stator core, the circulating flow of the cooling medium and direct cooling of the winding linear segments are achieved, which solves the problem of poor heat dissipation effect of the existing motor stator cooling technology, and significantly improves the motor's heat dissipation ability and performance.
Patent Information
- Application Number
- CN202510050756.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-05-27
AI Technical Summary
The existing motor stator cooling technology is difficult to effectively cool the stator core and winding linear segments, resulting in poor heat dissipation effect and limiting the performance of the motor.
The stator cooling system structure is adopted, in which the stator core consists of multiple stacked iron core punches, and multiple cooling tanks are arranged on the iron core punches. The cooling medium circulates through these notches, directly cools the straight section of the winding, and further dissipates heat through the inside of the iron core.
Through this structure, the cooling oil can more effectively remove the heat from the stator and winding, improve the heat dissipation ability of the motor, and improve the overall performance of the motor.
Smart Images
Figure CN120049647A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of motors, and particularly to a stator cooling system structure. Background Art
[0002] With the rapid development of new energy vehicles, as the core component of the three-electric system, motors are required by users to be lighter in weight, higher in power and speed. As a result, the problem of heat generation has emerged. In most of the current oil-cooled stator cooling technology solutions on the market, usually the ends of the stator windings and the surface of the stator silicon steel are cooled, but the stator core and the straight sections of the windings also generate heat, and the stator heat dissipation effect is not high, which greatly limits the performance of the motor. Summary of the Invention
[0003] The purpose of the present invention is to provide a stator cooling system structure in view of the deficiencies of the corresponding prior art. This stator cooling system structure can better cool the motor stator.
[0004] The purpose of the present invention is achieved by the following solution: A stator cooling system structure includes a stator core, which is formed by laminating multiple second core punching sheets and multiple third core punching sheets. The middle part of the stator core is the second core punching sheet, and both sides of the stator core are the third core punching sheets. A first core punching sheet is arranged in the middle of the second core punching sheet, and a first core punching sheet is arranged at the connection of the second core punching sheet and the third core punching sheet. A plurality of first cooling grooves axially penetrating the punching sheets are arranged on the circumference of the first core punching sheet. A second cooling groove communicating with the winding fixing groove and axially penetrating the punching sheet is arranged at the bottom of the winding fixing groove on the second core punching sheet. A plurality of third cooling grooves axially penetrating the punching sheets are arranged on the circumference of the third core punching sheet. Each cooling groove communicates with each other to form a cooling medium flow channel.
[0005] The first cooling grooves arranged on the circumference of the first core punching sheet are T-shaped grooves, and the vertical grooves of the first cooling grooves communicate with the circumference of the first core punching sheet.
[0006] The second cooling groove arranged on the second core punching sheet is a strip-shaped groove.
[0007] The third cooling groove on the third core punching sheet is a square groove.
[0008] Foamed insulating paper is arranged in the winding fixing groove of the stator core. The foamed insulating paper axially penetrates the winding fixing groove, and the foamed insulating paper is a strip-shaped structure with an open upper end face.
[0009] The advantages of the present invention are as follows. Under the action of an oil pump, the cooling oil circulates through each notch. During the circulation process, the cooling oil not only takes away the heat of the silicon steel from the inside of the stator, but also better cools the windings. In this way, the oil can directly cool the straight section of the windings and pass through the inside of the iron core. Further, the oil flows out to the windings at both ends, effectively improving the heat dissipation capacity. At the same time, advanced foamed insulating paper is inserted into the stator slots. On the premise of reducing the dipping process and ensuring good insulation, sufficient heat dissipation is achieved. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the cooling medium flow channel of the present invention; Figure 2 It is a schematic diagram of the stator core structure of the present invention; Figure 3 It is a schematic diagram of the structure of the first iron core punching sheet of the present invention; Figure 4 It is a schematic diagram of the structure of the second iron core punching sheet of the present invention; Figure 5 It is a schematic diagram of the structure of the third iron core punching sheet of the present invention; Figure 6 It is a schematic diagram of the structure of the foamed insulating paper of the present invention; Figure 7 It is a schematic cross-sectional view of the foamed insulating paper of the present invention. DETAILED DESCRIPTION OF THE INVENTION
[0011] As Figures 1 to 7As shown in the figure, a stator cooling system structure includes a stator core 4, which is formed by laminating multiple second core punching sheets 2 and multiple third core punching sheets 3. The middle part of the stator core 4 is the second core punching sheet 2, and the two sides of the stator core 4 are the third core punching sheets 3. A first core punching sheet 1 is arranged in the middle of the second core punching sheet 2, and a first core punching sheet 1 is arranged at the connection of the second core punching sheet 2 and the third core punching sheet 3. A plurality of first cooling grooves 5 axially penetrating the punching sheet are arranged on the circumference of the first core punching sheet 1. The first cooling grooves 5 arranged on the circumference of the first core punching sheet 1 are T-shaped grooves, and the vertical grooves of the first cooling grooves 5 communicate with the circumference of the first core punching sheet 1. A second cooling groove 6 communicating with the winding fixing groove 8 and axially penetrating the punching sheet is arranged at the bottom of the winding fixing groove 8 on the second core punching sheet 2. The second cooling groove 6 arranged on the second core punching sheet 2 is a strip-shaped groove. A plurality of third cooling grooves 7 axially penetrating the punching sheet are arranged on the circumference of the third core punching sheet 3. The third cooling grooves 7 on the third core punching sheet 3 are square grooves. Each cooling groove communicates with each other to form a cooling medium flow channel. A foamed insulating paper is arranged in the winding fixing groove 8 of the stator core 4. The foamed insulating paper axially penetrates the winding fixing groove 8. The foamed insulating paper is a strip-shaped structure with an open upper end face. After the foamed insulating paper is inserted into the stator slot, it can expand and fit tightly, and the straight section of the winding is cooled by the coolant through heat exchange.
[0012] The present invention uses an oil cooling method to cool the stator, mainly by the method of oil injection. There are cooling oil pipes around the stator. The oil pipes are provided with a plurality of oil injection holes. Through the action of a pump, the coolant sprays and cools the end of the winding or the outer surface of the stator core, and then circulates in the box body, thereby taking away the heat on the surface of the stator.
[0013] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Those skilled in the art can make modifications to the present invention without departing from the spirit of the present invention, and such modifications fall within the protection scope of the present invention.
Claims
1. A stator cooling system structure, comprising a stator core (4), characterized in that: The stator core (4) is formed by stacking a plurality of second core punching sheets (2) and a plurality of third core punching sheets (3); the middle of the stator core (4) is the second core punching sheet (2), and the two sides of the stator core (4) are the third core punching sheets (3); a first core punching sheet (1) is arranged in the middle of the second core punching sheet (2); a first core punching sheet (1) is arranged at the connection between the second core punching sheet (2) and the third core punching sheet (3); a plurality of first cooling grooves (5) axially penetrating the punching sheet are arranged on the circumference of the first core punching sheet (1); a second cooling groove (6) connected to the winding fixing groove (8) and axially penetrating the punching sheet is arranged at the bottom of the winding fixing groove (8) on the second core punching sheet (2); a plurality of third cooling grooves (7) axially penetrating the punching sheet are arranged on the circumference of the third core punching sheet (3); and the cooling grooves are interconnected to form a cooling medium flow channel.
2. The stator cooling system structure according to claim 1, characterized in that: The first cooling groove (5) arranged on the circumference of the first core punching sheet (1) is a T-shaped groove, and the vertical groove of the first cooling groove (5) is connected to the circumference of the first core punching sheet (1).
3. The stator cooling system structure according to claim 1, characterized in that: The second cooling groove (6) provided on the second core punching sheet (2) is a strip-shaped groove.
4. The stator cooling system structure according to claim 1, characterized in that: The third cooling groove (7) on the third iron core punching sheet (3) is a square groove.
5. The stator cooling system structure according to claim 1, characterized in that: A foamed insulating paper is arranged in the winding fixing slot (8) of the stator core (4), the foamed insulating paper axially penetrates the winding fixing slot (8), and the foamed insulating paper is a long strip structure with an open upper end surface.