A compound-cooled electric machine

Abstract

This utility model discloses a composite-cooled motor, belonging to the field of motor technology. It includes a stator and a rotor coaxially arranged within a housing. A water jacket is formed within the housing. The stator includes a stator core, and an mounting groove is formed on the outer wall of the stator core. A peripheral micro-heat pipe is embedded in the mounting groove. The peripheral micro-heat pipe extends out of the surface of the stator core and contacts the inner wall of the water jacket. In this design, heat transfer between the stator and the water jacket is achieved through the surface of the peripheral micro-heat pipe and the surface of the stator core, realizing composite cooling of water and heat pipes. Due to the extremely high thermal conductivity of the micro-heat pipe, the peripheral micro-heat pipe can efficiently transfer heat from the stator to the water jacket, improving heat transfer efficiency, maintaining a suitable operating temperature for the motor, and increasing power density.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to a composite-cooled motor. Background Technology

[0002] The new energy vehicle industry has experienced rapid development due to its economic and environmental benefits. As the power source for new energy vehicles, the reliability of the electric motor directly impacts driving safety. Traditional motor cooling systems consist of a housing and a water jacket for heat dissipation. The stator and water jacket are tightly fitted, and heat from the stator is transferred to the cooling water through contact with the water jacket, resulting in low heat transfer efficiency as all heat is transferred through the stator core to the water jacket. Furthermore, the slot wedges in traditional stators, made of bakelite or fiberglass, only serve as insulation and winding anchors, failing to contribute to heat dissipation for both the stator and rotor. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a composite cooling motor that has high overall heat dissipation efficiency, can keep the motor at a suitable operating temperature, and thus improve power density, in order to address the shortcomings of the existing technology.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A composite-cooled motor includes a stator and a rotor coaxially disposed within a housing. A water jacket is formed within the housing. The stator includes a stator core. An installation groove is provided on the outer side wall of the stator core. A peripheral micro heat pipe is embedded in the installation groove. The peripheral micro heat pipe extends out of the surface of the stator core and contacts the inner side wall of the water jacket.

[0006] Furthermore, the inner wall of the stator is provided with toothed micro heat pipes, which fix the stator windings inside the teeth of the stator core.

[0007] Furthermore, the stator core is provided with an end micro heat pipe at its end, the end micro heat pipe is connected to the tooth micro heat pipe, and the end micro heat pipe is in contact with the inner wall of the motor end cover.

[0008] Furthermore, a heat-conducting medium is provided between the outer wall of the stator core and the housing, and between the end micro heat pipe and the end cover.

[0009] Furthermore, the outer side wall of the end cap is evenly provided with multiple heat dissipation teeth along the circumferential direction.

[0010] Furthermore, the end micro heat pipe has a ring structure, and the end micro heat pipe is connected to the peripheral micro heat pipe through a connecting part.

[0011] Furthermore, the peripheral micro heat pipe and the toothed micro heat pipe extend along the axial direction of the stator.

[0012] Furthermore, the peripheral micro heat pipe and the toothed micro heat pipe are divided into left and right parts, and the two parts are respectively connected to the end micro heat pipes at both ends to form an integrated micro heat pipe. The two parts of the integrated micro heat pipe are fastened to the stator on the left and right sides.

[0013] Furthermore, the peripheral micro heat pipe, the toothed micro heat pipe, and the end micro heat pipe are all ceramic micro heat pipes.

[0014] After adopting the above technical solution, the beneficial effects of this utility model are:

[0015] In the composite cooling motor disclosed in this utility model, the heat transfer between the stator and the water jacket is composed of the surface of the peripheral micro heat pipe and the surface of the stator core, realizing composite cooling of water cooling and heat pipe. Since the micro heat pipe has extremely high thermal conductivity, the peripheral micro heat pipe can efficiently transfer the heat of the stator to the water jacket, which can improve the heat transfer efficiency, keep the motor at a suitable operating temperature, and improve the power density.

[0016] In this invention, the toothed micro-heat pipe acts as a slot wedge to fix the stator winding. Simultaneously, in conjunction with the end micro-heat pipe, it conducts heat from the stator teeth to the end micro-heat pipe, and then through a heat-conducting medium to the end cover for heat dissipation. The heat dissipation teeth on the end cover further assist in heat dissipation. Furthermore, the toothed micro-heat pipe can absorb heat dissipated by the rotor through the air gap space, further improving the overall heat dissipation efficiency of the machine.

[0017] In this invention, the end micro heat pipe is also connected to the peripheral micro heat pipe, which facilitates the conduction of heat to the water jacket and results in high heat dissipation efficiency.

[0018] In this invention, the toothed micro heat pipe, the end micro heat pipe, and the peripheral micro heat pipe can form an integrated structure. This structure is divided into left and right parts that are fastened to the stator for easy installation and fixation. This structure has no moving parts, has little impact on the original motor, and can ensure reliable motor operation. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural schematic diagram of the composite cooling motor of this utility model;

[0020] Figure 2 This is a schematic diagram of the stator's exploded structure;

[0021] Figure 3 This is a schematic diagram of the fit between the stator and the housing;

[0022] Figure 4 yes Figure 3 Internal structure diagram;

[0023] Figure 5 yes Figure 4 Enlarged diagram of section A in the middle;

[0024] Figure 6 This is a structural diagram of the left or right end cap;

[0025] Figure 7a , 7b 7c is a schematic diagram of the process of assembling the integrated micro heat pipe with the stator;

[0026] In the diagram, 10-casing, 11-left end cover, 12-right end cover, 13-heat transfer medium, 14-heat dissipation teeth, 15-reinforcing rib, 2-stator, 21-stator core, 211-mounting slot, 212-stator winding, 22-integrated micro heat pipe, 221-circumferential micro heat pipe, 222-tooth micro heat pipe, 223-end micro heat pipe, 224-connection part, 3-rotor. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the textual part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a composite-cooled motor includes a stator 2 and a rotor 3 coaxially mounted within a housing 10. A water jacket (not shown) is formed within the housing 10. The stator 2 includes a stator core 21, with a mounting groove 211 on its outer side wall. A peripheral micro heat pipe 221 is embedded in the mounting groove 211, extending beyond the surface of the stator core 21 and contacting the inner side wall of the water jacket. Heat transfer between the stator 2 and the water jacket is achieved through the surfaces of the peripheral micro heat pipe 221 and the stator core 21, realizing composite cooling of water and heat pipes.

[0029] Specifically, the peripheral micro heat pipes 221 are formed along the axial direction of the stator 2. Multiple peripheral micro heat pipes 221 are provided and evenly distributed on the outer circumferential wall of the stator core 21, which can evenly transfer the heat of the stator 2 to the water jacket inside the casing 10.

[0030] like Figure 2 and Figure 3As shown, the inner wall of the stator core 21 is provided with toothed micro heat pipes 222, which act as slot wedges to fix the stator winding 212 within the teeth of the stator 2. Since the toothed micro heat pipes 222 are located on the inner wall of the stator 2, they can absorb the heat emitted by the rotor 3 through the air gap between the rotor 3 and the stator 2 and transfer the heat away.

[0031] Specifically, the toothed micro heat pipes 222 are formed along the axial direction of the stator 2. Multiple toothed micro heat pipes 222 are provided and evenly distributed on the inner sidewall of the stator core 21, which can evenly absorb the heat of the stator 2 and the rotor 3.

[0032] like Figure 2 and Figure 4 As shown, the stator core 21 is provided with an end micro heat pipe 223 at its end. The end micro heat pipe 223 is connected to the tooth micro heat pipe 222. The end micro heat pipe 223 is in contact with the inner wall of the motor end cover. Therefore, the end micro heat pipe 223 will transfer the heat absorbed by the stator 2 and rotor 3 to the end cover to assist the stator 2 in heat dissipation. The end cover here is the left end cover 11 and the right end cover 12 of the motor.

[0033] like Figure 4 and Figure 5 As shown, a heat-conducting medium 13 is provided between the outer wall of the stator core 21 and the housing 10, and between the end heat pipe 223 and the left end cover 11 and the right end cover 12. This improves the efficiency of heat transfer between the circumferential heat pipe and the water jacket, and between the end heat pipe 223 and the left end cover 11 and the right end cover 12. The heat-conducting medium 13 can be thermal grease, a rubber thermal pad, or other thermally conductive structures.

[0034] like Figure 4 and Figure 6 As shown, the outer walls of the left end cover 11 and the right end cover 12 are evenly provided with multiple heat dissipation teeth 14 along the circumferential direction, which increases the heat dissipation area of ​​the left end cover 11 and the right end cover 12 and can accelerate the heat dissipation speed. The outer walls of the left end cover 11 and the right end cover 12 are also provided with reinforcing ribs 15, which can improve the strength of the end cover.

[0035] Preferred, such as Figure 2 As shown, the end micro heat pipe 223 has a ring structure and is connected to the peripheral micro heat pipe 221 through the connecting part 224. The peripheral micro heat pipe 221 and the toothed micro heat pipe 222 extend along the axial direction of the stator 2. The connecting part 224 needs to avoid the stator winding 212 on the stator 2.

[0036] To facilitate the assembly of micro heat pipes, combined with Figure 2 and Figure 7a , Figure 7b , Figure 7cAs shown, the peripheral micro heat pipe 221 and the toothed micro heat pipe 222 are divided into left and right parts. Each part is connected to the end micro heat pipes 223 at both ends to form an integrated micro heat pipe 22. The two integrated micro heat pipes 22 are fastened to the stator 2 on both sides. The annular end micro heat pipes 223 facilitate the formation of the integrated micro heat pipe 22. After the stator windings 212 are installed on the stator core 21, the two integrated heat pipes can be fastened to the motor stator 2 along the direction of the arrows in the figure.

[0037] Preferably, the peripheral micro heat pipe 221, the toothed micro heat pipe 222, and the end micro heat pipe 223 in this application are all ceramic micro heat pipes, which have higher heat conduction efficiency.

[0038] The composite cooling motor of this invention uses peripheral micro heat pipes, toothed micro heat pipes, and end micro heat pipes on the stator to conduct heat from the stator and rotor to the end cover and water jacket for cooling. This design uses a combination of water cooling and heat pipe cooling to precisely cool different parts of the motor. The micro heat pipes have extremely high thermal conductivity, which effectively improves the cooling efficiency. This invention keeps the motor at a suitable operating temperature and increases the power density.

[0039] In the description of this specification, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationships based on the directional or positional relationships 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.

[0040] In the description of this specification, unless otherwise expressly defined, the terms "setup", "installation", "connection", etc. should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in combination with the specific content of the technical solution.

[0041] While specific embodiments of this utility model have been described above, those skilled in the art should understand that the described embodiments are merely some, not all, embodiments of this utility model. These are merely illustrative examples, and the scope of protection of this utility model is defined by the claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model and without any inventive effort, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A composite-cooled motor, comprising a stator (2) and a rotor (3) coaxially disposed within a housing (10), wherein a water jacket is formed within the housing (10), and the stator (2) comprises a stator core (21), characterized in that, An installation groove (211) is provided on the outer side wall of the stator core (21), and a peripheral micro heat pipe (221) is embedded in the installation groove (211). The peripheral micro heat pipe (221) extends out of the surface of the stator core (21) and contacts the inner side wall of the water jacket.

2. The composite cooling motor according to claim 1, characterized in that, The inner wall of the stator core (21) is provided with a toothed micro heat pipe (222), which fixes the stator winding (212) in the toothed part of the stator core (21).

3. The composite cooling motor according to claim 2, characterized in that, The stator core (21) is provided with an end micro heat pipe (223), which is connected to the tooth micro heat pipe (222). The end micro heat pipe (223) is in contact with the inner wall of the motor end cover (11, 12).

4. The composite cooling motor according to claim 3, characterized in that, A heat-conducting medium (13) is provided between the outer wall of the stator core (21) and the housing (10), as well as between the end micro heat pipe (223) and the end cap (11, 12).

5. The motor with composite cooling according to claim 3, characterized in that, Multiple heat dissipation teeth (14) are evenly distributed along the circumferential direction on the outer side wall of the end caps (11, 12).

6. The motor with composite cooling according to claim 3, characterized in that, The end micro heat pipe (223) has a ring structure and is connected to the peripheral micro heat pipe (221) through the connecting part (224).

7. The composite cooling motor according to claim 6, characterized in that, The peripheral micro heat pipe (221) and the toothed micro heat pipe (222) extend along the axial direction of the stator.

8. The motor with composite cooling according to claim 7, characterized in that, The peripheral micro heat pipe (221) and the toothed micro heat pipe (222) are divided into left and right parts. The two parts are connected to the end micro heat pipes (223) at both ends to form an integrated micro heat pipe (22). The two integrated micro heat pipes (22) are fastened to the stator (2) on the left and right sides.

9. The motor with composite cooling according to any one of claims 3 to 8, characterized in that, The peripheral micro heat pipe (221), the toothed micro heat pipe (222), and the end micro heat pipe (223) are all ceramic micro heat pipes.

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