Heat dissipation motor

Abstract

The utility model discloses a heat dissipation motor, which comprises a casing, a heat pipe, a stator core, a stator winding, a rotor core and a rotating shaft, and is characterized in that the rotating shaft is installed on the casing through a bearing, the rotor core, the stator winding and the stator core are sequentially installed on the rotating shaft from inside to outside, and the heat pipe is embedded in the casing; the heat pipe comprises a heat exchange part facing the stator iron core and a supporting part in contact with the casing, and the heat exchange part, facing the stator iron core, of the heat pipe is heat exchange corrugations; the heat pipe is provided with a hollow part, and fused salt is filled in the hollow part. Even under extreme working conditions such as high-frequency and high-power braking, heat generated by the motor can be efficiently conducted to the fused salt through the heat exchange corrugations, so that the motor is always in a controllable temperature range, the problem of thermal failure caused by high temperature of the motor is effectively avoided, and the service life of the motor is prolonged. And the working performance of the electronic braking system is effectively improved.

Description

TECHNICAL FIELD

[0001] The application relates to a heat dissipation motor, in particular to a heat dissipation motor used in the field of electronic braking technology. BACKGROUND

[0002] The braking force of an electronic braking system is generated by a motor on a wheel, and the motor generates a local high temperature phenomenon during braking.

[0003] In order to better achieve cooling, CN220273469U provides a heat dissipation motor, which is combined with the attached Figure 1 The heat dissipation motor comprises a shell 11, a front end cover 12, a heat pipe 13, a stator core 14, a stator winding 15, a rotor core 16, a magnetic steel 17, a front bearing, a rear bearing and a rotating shaft, wherein the shell cooperates with the front end cover to form a motor housing; the front bearing is installed at the center of the front end cover, the rear bearing is installed at the center of the shell, and the rotating shaft passes through the front bearing and the rear bearing for installation; the rotating shaft sequentially installs the rotor core, the magnetic steel, the stator winding and the stator core; the heat pipe comprises not less than two heat pipes, the heat pipe is flat, the cross-sectional curvature of the heat pipe is consistent with the internal curvature of the shell, the length of the heat pipe matches the length of the shell, the internal surface of the shell is uniformly provided with grooves of the same number as the heat pipes, the heat pipes are embedded in the grooves of the shell, and the heat pipes tightly cover the stator core.

[0004] The heat dissipation motor in the above patent adopts a flat heat pipe embedded on the circular arc surface of the shell, does not occupy the internal space of the motor, and is in large-area contact with the shell for heat conduction, which can meet the high-temperature heat dissipation problem of the motor under locked-rotor working condition during long-time braking, can solve the problems of winding high temperature and rotor high temperature demagnetization caused by the EMB high-performance motor under the conditions of long-time braking of the motor under compact and high-temperature environment, and thus improves the high-temperature resistance, service life and reliability of the EMB.

[0005] However, with the popularization of the auxiliary driving function in intelligent vehicles, in addition to the traditional braking signal input by the driver, the vehicle intelligent driving assistance system also transmits braking instructions to the braking system. In some extreme working conditions, the intelligent driving assistance system will transmit high-frequency and high-braking-force braking instructions to the braking system. In this case, in addition to being able to quickly respond to the braking frequency and braking force of the braking instruction, the braking motor also needs to dissipate the heat generated by the motor itself under high frequency and large braking force in time, so as to prevent the motor from being protected due to high temperature, reduce the power of the motor, and fail to respond to the high-frequency and large-braking-force instructions of the intelligent driving assistance system. The heat dissipation motor in the application cannot meet the heat dissipation requirements under this extreme working condition. CONTENT OF THE UTILITY MODEL

[0006] In view of the problems existing in the prior art, the purpose of this application is to provide a heat dissipation motor that can effectively dissipate heat even under extreme working conditions.

[0007] This invention provides a heat dissipation motor, comprising a housing, a heat pipe, a stator core, a stator winding, a rotor core, and a shaft. The shaft is mounted on the housing via bearings. The rotor core, stator winding, and stator core are sequentially mounted on the shaft from the inside out. The heat pipe is embedded in the housing. The heat pipe includes a heat exchange section facing the stator core and a support section in contact with the housing. The heat exchange section facing the stator core is corrugated. The heat pipe has a hollow section filled with molten salt.

[0008] Preferably, the heat exchange section of the heat pipe facing the stator core further includes a heat exchange region with a planar shape.

[0009] Preferably, the inner surface of the housing is provided with a groove, and the support portion of the heat pipe is embedded in the groove.

[0010] Preferably, the number of grooves and heat pipes are equal, both being 2-8.

[0011] Preferably, the heat pipe is closely attached to and covers the stator core.

[0012] The heat-dissipating motor of this invention effectively solves the heat dissipation problem of large amounts of heat generated in electronic braking systems under high-frequency, high-power conditions. By using heat exchange corrugations with a larger heat exchange area and a hollow section containing heat exchange material, the heat-dissipating motor of this invention can efficiently conduct the heat generated by the motor under extreme conditions, preventing overheating and thus improving the performance and safety of the electronic braking system. The heat-dissipating motor of this invention has broad application prospects, large market demand, and good commercial value. Attached Figure Description

[0013] Figure 1 It is a heat dissipation motor in existing technology

[0014] Figure 2 The heat pipe of the cooling motor provided in the embodiments of this application is

[0015] Figure 3 yes Figure 2 AA interface diagram of the middle heat pipe

[0016] Figure 4 yes Figure 3 Enlarged view of a part

[0017] Wherein: 1: First region, 2: Second region, 3: Third region, 4: Heat exchange corrugation, 5: Heat absorption material, 6: Heat exchange section, 7: Support section, 11: Housing, 12: Front cover, 13: Heat pipe, 14: Stator core, 15: Stator winding, 16: Rotor core, 17: Magnet, I: Heat pipe. Detailed Implementation

[0018] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the specific embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the disclosure of the present application to those skilled in the art.

[0019] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, to avoid confusion with this application, some technical features well-known in the art have not been described; that is, not all features of actual embodiments are described herein, nor are well-known functions and structures described in detail.

[0020] In the accompanying drawings, for clarity, the dimensions of layers, areas, and elements, as well as their relative dimensions, may be exaggerated. The same reference numerals denote the same elements throughout.

[0021] Similar to the prior art, the cooling motor of the present invention still includes a housing, a front cover, heat pipes, a stator core, a stator winding, a rotor core, magnets, a front bearing, a rear bearing, a coupling, and a shaft. The motor housing mates with the front cover to form the motor casing. A hole is formed at the center of the front cover, the front bearing is mounted at the center of the front cover, the rear bearing is mounted at the center of the housing, and the shaft passes through the front and rear bearings. The rotor core, magnets, stator winding, and stator core are sequentially mounted on the shaft from the inside out. The stator winding is installed in slots within the stator core. The coupling is installed on the portion of the shaft extending beyond the front cover. The heat pipes are embedded in the housing, closely adhering to and covering the stator core.

[0022] like Figure 2 and Figure 3The heat pipe of the present invention shown is rectangular and flat, comprising a heat exchange section 6 facing the stator core and a support section 7 in contact with the housing. The surface of the heat exchange section facing the stator core is divided into a first region 1, a second region 2, and a third region 3. The first and second regions are planar, while the third region 3 has heat exchange corrugations 4, which have a larger heat exchange area and can conduct heat generated by the stator core. Grooves are provided on the inner surface of the housing, and the support section of the heat pipe is embedded in these grooves. The number of grooves is equal to the number of heat pipes, both being 2-8.

[0023] Combination Figure 3 and Figure 4 The heat pipe of the present invention has a hollow section, which is filled with heat exchange material 5, preferably molten salt. The presence of the aforementioned heat exchange material, particularly molten salt, allows the heat generated by the motor under extreme vehicle operating conditions—even during high-frequency, high-power braking—to be efficiently conducted to the molten salt through the heat exchange corrugations. Furthermore, the heat in the high-temperature molten salt is rapidly carried away from the motor through the heat conduction path, thus keeping the motor within a controllable temperature range. This effectively avoids thermal failure caused by high motor temperature and significantly improves the performance of the electronic braking system.

[0024] It should be understood that the phrases "in embodiments of this application" or "in some embodiments" throughout the specification mean that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in embodiments of this application" or "in some embodiments" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this application, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. The sequence numbers of the above-described embodiments are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0025] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A heat-dissipating motor, comprising a casing, a heat pipe, a stator core, a stator winding, a rotor core and a rotating shaft, the rotating shaft being mounted on the casing through a bearing, and from inside to outside, the rotor core, the stator winding and the stator core being mounted on the rotating shaft, characterized in that: the heat pipe is embedded in the casing; the heat pipe comprises a heat exchange part facing the stator core and a supporting part in contact with the casing, the heat exchange part of the heat pipe facing the stator core being a heat exchange corrugation; the heat pipe has a hollow part containing molten salt; the heat exchange part of the heat pipe facing the stator core further comprises a heat exchange area having a planar shape; the inner surface of the casing is provided with a groove, and the supporting part of the heat pipe is embedded in the groove; the number of the grooves and the heat pipes is equal, and is 2-8; the heat pipe is in close contact with and covers the stator core. ​ ​ ​ 2. The heat dissipating electric machine of claim 1, wherein, ​ 3. The heat dissipating electric machine of claim 1, wherein, ​ 4. The heat dissipating electric machine of claim 3, wherein, ​ 5. The heat dissipating electric machine according to any one of claims 1 to 4, characterized in that, ​

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