Epoxy resin pouring motor with high temperature measurement precision

Abstract

The utility model discloses an epoxy resin pouring motor with high temperature measurement precision, which comprises a stator winding and a sleeve shell sleeved on the stator winding, a pouring cavity for pouring epoxy resin is arranged between the sleeve shell and the stator winding, and the pouring cavity is filled with the epoxy resin; the stator winding comprises a stator and an electromagnetic coil wound around the stator, a temperature measuring device abutting against the stator winding is arranged in the pouring cavity and comprises a temperature measuring piece and a heat conduction piece, the temperature measuring piece is installed on the heat conduction piece, and the heat conduction piece is provided with a first heat conduction face abutting against the electromagnetic coil and a second heat conduction face abutting against the temperature measuring piece. The first heat conduction face is provided with an inner concave part matched with the electromagnetic coil. And after the epoxy resin is cured, the temperature measuring device and the stator winding are connected into a whole, so that the connection strength and the installation stability of the temperature measuring device and the stator winding are greatly improved, and the influence caused by the vibration effect in the working process of the motor can be effectively resisted.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of motor equipment, and particularly relates to an epoxy resin cast motor with high temperature measurement precision. BACKGROUND

[0002] A motor is a device for converting electric energy into mechanical energy. It uses the rotating magnetic field generated by the stator winding to act on the rotor to form a magnetic electric power rotating torque. During transient or steady-state long-time operation, the motor will generate heat, and when the heat accumulates to a certain degree, the motor needs to be cooled, otherwise the stator winding will be damaged. Therefore, a temperature measuring device needs to be installed to monitor the temperature of the stator winding.

[0003] The conventional temperature measuring device for measuring the temperature of the stator winding of the motor is installed on the motor shell. The heat emitted by the stator winding is transferred to the motor shell in the form of heat radiation in the air and then measured by the temperature measuring device. The temperature measuring device cannot obtain the real-time temperature of the stator winding, and the temperature measurement precision is low. In addition, during the installation process of the motor, the external temperature measuring device of the motor is prone to contact with other components, which affects the installation stability of the temperature measuring device and even causes damage to the temperature measuring device. In addition, due to the vibration during the operation of the motor, the vibration generated during the long-time operation of the motor can cause the temperature measuring device to be loose, which affects the measurement precision. CONTENT OF THE INVENTION

[0004] The application provides an epoxy resin cast motor with high temperature measurement precision to solve the technical problem of low temperature measurement precision of the conventional temperature measuring device for measuring the temperature of the stator winding of the motor, which is prone to loosening due to the vibration and installation of the motor.

[0005] The technical scheme adopted by the application is as follows:

[0006] An epoxy resin cast motor with high temperature measurement precision, comprising a stator winding and a sleeve shell sleeved on the stator winding, a pouring cavity for pouring epoxy resin being formed between the sleeve shell and the stator winding, and the pouring cavity being filled with epoxy resin; the stator winding comprises a stator and an electromagnetic coil wound on the stator; a temperature measuring device abutting against the stator winding is arranged in the pouring cavity; the temperature measuring device comprises a temperature measuring element and a heat conducting element; the temperature measuring element is installed on the heat conducting element; the heat conducting element has a first heat conducting surface abutting against the electromagnetic coil and a second heat conducting surface abutting against the temperature measuring element; and the first heat conducting surface has an inner recess matched with the electromagnetic coil.

[0007] The epoxy resin cast motor described in the application further comprises the following additional technical features:

[0008] The stator winding comprises a plurality of electromagnetic coils, and the number of the inner recesses corresponds to the number of the electromagnetic coils.

[0009] The temperature measuring element includes a temperature measuring probe and a transmission wire. The temperature measuring probe has a first positioning hole, and the heat-conducting element has a second positioning hole corresponding to the first positioning hole. The temperature measuring probe and the heat-conducting element are connected by positioning elements that pass through the first positioning hole and the second positioning hole in sequence.

[0010] The projection of the temperature probe toward the heat-conducting component falls entirely on the heat-conducting component.

[0011] The casing has an outlet hole for the transmission wire to pass through.

[0012] The epoxy resin casting motor includes multiple stator windings, which are coaxially arranged and each is equipped with the temperature measuring device.

[0013] The temperature measuring devices on two adjacent stator windings are arranged in a staggered manner.

[0014] The heat-conducting component has a sheet-like structure and is made of thermally conductive ceramic.

[0015] Thermally conductive silicone is applied between the heat-conducting component and the stator winding.

[0016] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0017] 1. The epoxy resin cast motor of this application includes a stator winding and a housing fitted over the stator winding. A temperature measuring device is installed within the casting cavity formed between the stator winding and the housing, abutting against the electromagnetic coil of the stator winding. Because the temperature measuring device abuts against the electromagnetic coil, the heat dissipated by the stator winding during motor operation can be directly captured by the temperature measuring device, effectively improving the temperature measuring accuracy and real-time performance. Furthermore, since the casting cavity is filled with epoxy resin, after the epoxy resin cures, it connects the temperature measuring device and the stator winding into a single unit, greatly improving the connection strength and installation stability between the temperature measuring device and the stator winding. This effectively resists the impact of vibration during motor operation. Simultaneously, because the temperature measuring device is installed within the casting cavity, the housing can shield and protect the temperature measuring device. During motor installation and transportation, the temperature measuring device can be effectively protected from collision damage. Furthermore, the temperature measuring device includes a temperature measuring element and a heat-conducting element. The heat-conducting element has a first heat-conducting surface that contacts the electromagnetic coil and a second heat-conducting surface that contacts the temperature measuring element. The heat-conducting element increases the heat absorption area of ​​the stator winding, thereby enhancing the heat transfer efficiency from the stator winding to the temperature measuring element. On the other hand, the concave portion on the first heat-conducting surface further increases the contact area between the first heat-conducting surface and the electromagnetic coil, further improving the temperature transfer efficiency of the heat-conducting element to the electromagnetic coil. Simultaneously, the concave portion matches the outer surface shape of the electromagnetic coil, ensuring a tight fit between the first heat-conducting surface and the electromagnetic coil, increasing the connection tightness between the heat-conducting element and the electromagnetic coil, thus significantly increasing the connection strength between the temperature measuring device and the stator winding, and improving the installation stability of the temperature measuring device.

[0018] 2. In a preferred embodiment of this application, the stator winding is provided with a plurality of electromagnetic coils, and the number of concave portions on the first heat-conducting surface corresponds to the number of electromagnetic coils, so that the first heat-conducting surface can achieve a greater degree of contact with the plurality of electromagnetic coils, thereby increasing the tightness of the connection between the heat-conducting component and the stator winding. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a front view of the motor portion structure according to one embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the temperature measuring device according to one embodiment of this application;

[0022] Figure 3 This is a side view of the motor according to one embodiment of this application;

[0023] Figure 4 This is a top view of a heat-conducting component according to one embodiment of this application;

[0024] Figure 5 This is a front view of a heat-conducting component according to one embodiment of this application.

[0025] in:

[0026] 1. Stator winding, 11. Stator, 12. Electromagnetic coil;

[0027] 2 housings, 21 cable outlets;

[0028] 3. Infusion chamber;

[0029] 4 Temperature measuring device, 41 Temperature measuring element, 411 Temperature measuring probe, 4111 First positioning hole, 412 Transmission wire, 42 Heat conducting element, 421 First heat conducting surface, 4211 Inner recess, 422 Second heat conducting surface, 423 Second positioning hole. Detailed Implementation

[0030] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0032] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0035] like Figures 1 to 5 As shown, an epoxy resin casting motor with high temperature measurement accuracy includes a stator winding 1 and a housing 2 sleeved on the stator winding 1. A filling cavity 3 for injecting epoxy resin is provided between the housing 2 and the stator winding 1, and the filling cavity 3 is filled with epoxy resin. The stator winding 1 includes a stator 11 and an electromagnetic coil 12 wound on the stator 11. A temperature measuring device 4 is provided inside the filling cavity 3, abutting against the stator winding 1. The temperature measuring device 4 includes a temperature measuring element 41 and a heat-conducting element 42. The temperature measuring element 41 is mounted on the heat-conducting element 42. The heat-conducting element 42 has a first heat-conducting surface 421 abutting against the electromagnetic coil 12 and a second heat-conducting surface 422 abutting against the temperature measuring element 41. The first heat-conducting surface 421 has an inner recess 4211 adapted to the electromagnetic coil 12.

[0036] An epoxy resin cast motor is a motor that is cast with epoxy resin. Epoxy resin, as a commonly used insulating material, has good electrical insulation and mechanical properties. It can effectively protect the stator winding 1 inside the motor, prevent the stator winding 1 and other electrical components inside the motor from being affected by the external environment, and improve the stability and service life of the motor.

[0037] The epoxy resin cast motor of this application includes a stator winding 1 and a housing 2 sleeved on the stator winding 1. A temperature measuring device 4, which abuts against the electromagnetic coil 12 of the stator winding 1, is installed in the casting cavity 3 formed between the stator winding 1 and the housing 2. Because the temperature measuring device 4 abuts against the electromagnetic coil 12, the heat dissipated by the stator winding 1 during motor operation can be directly obtained by the temperature measuring device 4, effectively improving the temperature measuring accuracy and real-time performance. Furthermore, since the casting cavity 3 is filled with epoxy resin, after the epoxy resin cures, it will connect the temperature measuring device 4 and the stator winding 1 into a single unit, greatly improving the connection strength and installation stability between the temperature measuring device 4 and the stator winding 1. This effectively resists the impact of vibration during motor operation. Simultaneously, because the temperature measuring device 4 is installed inside the casting cavity 3, the housing 2 can shield and protect the temperature measuring device 4, effectively preventing damage during motor installation and transportation. The temperature measuring device 4 was damaged by an impact. Furthermore, the temperature measuring device 4 includes a temperature measuring element 41 and a heat conducting element 42. The heat conducting element 42 has a first heat conducting surface 421 that abuts against the electromagnetic coil 12 and a second heat conducting surface 422 that abuts against the temperature measuring element 41. The heat conducting element 42 increases the heat absorption area of ​​the stator winding 1, thereby enhancing the heat conduction efficiency of the stator winding 1 to the temperature measuring element 41. On the other hand, the recessed portion 4211 on the first heat conducting surface 421 further increases the contact area between the first heat conducting surface 421 and the electromagnetic coil 12, thereby further improving the temperature transmission efficiency of the heat conducting element 42 to the electromagnetic coil 12. At the same time, the shape of the recessed portion 4211 matches the outer surface of the electromagnetic coil 12, making the first heat conducting surface 421 and the electromagnetic coil 12 fit tightly together, increasing the connection tightness between the heat conducting element 42 and the electromagnetic coil 12, thereby greatly increasing the connection strength between the temperature measuring device 4 and the stator winding 1 and improving the installation stability of the temperature measuring device 4.

[0038] As a preferred embodiment of this application, as shown in Figure 1, Figure 3 As shown, the stator winding 1 includes multiple electromagnetic coils 12, and the number of recesses 4211 corresponds to the number of electromagnetic coils 12. The stator winding 1 is provided with multiple electromagnetic coils 12, and the number of recesses 4211 on the first heat-conducting surface 421 corresponds to the number of electromagnetic coils 12, enabling the first heat-conducting surface 421 to achieve a greater degree of contact with the multiple electromagnetic coils 12, thereby increasing the tightness of the connection between the heat-conducting component 42 and the stator winding 1. The multiple electromagnetic coils 12 referred to here mean that the electromagnetic coils 12 are wound multiple times on the stator 11. In another embodiment of this application, the number of recesses 4211 is less than the number of electromagnetic coils 12, and the recesses 4211 only correspond to a portion of the multiple electromagnetic coils 12.

[0039] As a preferred embodiment of this application, such as Figure 2 , Figure 4As shown, the temperature measuring element 41 includes a temperature measuring probe 411 and a transmission wire 412. The temperature measuring probe 411 has a first positioning hole 4111, and the heat-conducting element 42 has a second positioning hole 423 corresponding to the first positioning hole 4111. The temperature measuring probe 411 and the heat-conducting element 42 are connected by positioning elements that pass through the first positioning hole 4111 and the second positioning hole 423 in sequence. By setting the first positioning hole 4111, the second positioning hole 423, and the positioning elements, a stable connection between the temperature measuring probe 411 and the heat-conducting element 42 is achieved, improving the tightness of their connection, thereby enabling stable measurement of the heat transferred by the temperature measuring probe 411 to the heat-conducting element 42.

[0040] Preferably, the temperature probe 411 is a thermocouple, which converts the measured temperature signal into a thermoelectric potential signal and transmits it to the temperature control module of the motor through the transmission wire 412.

[0041] As a preferred embodiment of this implementation, such as Figure 2 As shown, the projection of the temperature probe 411 toward the heat-conducting element 42 falls entirely on the heat-conducting element 42. This arrangement increases the maximum contact between the temperature probe 411 and the heat-conducting element 42, thereby improving the stability of the temperature probe 411 in measuring heat on the heat-conducting element 42. Preferably, the temperature probe 411 has a heat-receiving surface that is in contact with the second heat-conducting surface 422.

[0042] As another preferred embodiment of this implementation, such as Figure 1 , Figure 2 As shown, the housing 2 has an outlet hole 21 for the transmission wire 412 to pass through. The transmission wire 412 is led out of the housing 2 through the outlet hole 21 and connected to the temperature control module outside the motor.

[0043] In a preferred embodiment of this application, the epoxy resin cast motor includes multiple stator windings 1, which are coaxially arranged and each equipped with the temperature measuring device 4. Preferably, the multiple stator windings 1 use the same stator 11, which is provided with multiple independent electromagnetic coils 12 to form multiple stator windings 1. Correspondingly, the number of housings 2 corresponds to the number of stator windings 1 and is respectively fitted onto the outside of each stator winding 1.

[0044] As a preferred embodiment of this implementation, such as Figure 1As shown, the temperature measuring devices 4 on adjacent stator windings 1 are staggered. This staggered arrangement of the temperature measuring devices 4 improves the uniformity of temperature measurement on the stator windings 1 of the motor, reducing the probability of heat accumulation in a certain area of ​​multiple stator windings 1 that cannot be detected by the temperature measuring device 4. Furthermore, the staggered arrangement of the temperature measuring devices 4 reduces the assembly difficulty, providing more operating space for assemblers during installation and preventing mutual interference between the temperature measuring devices 4.

[0045] As a preferred embodiment of this application, such as Figure 2 As shown, the heat-conducting element 42 has a sheet-like structure and is made of thermally conductive ceramic. The sheet-like structure of the heat-conducting element 42 makes it easier to connect to the electromagnetic coil 12, increases the contact area between the heat-conducting element 42 and the electromagnetic coil 12, and provides a more stable fixed position for the temperature measuring element 41, making the connection between the temperature measuring element 41 and the heat-conducting element 42 more secure. Furthermore, the heat-conducting element 42, made of thermally conductive ceramic, has excellent thermal conductivity, enabling it to transfer a large amount of heat from the stator winding 1 to the temperature measuring element 41, thus improving the temperature measurement accuracy of the temperature measuring device 4.

[0046] In a preferred embodiment of this invention, thermally conductive silicone is applied between the heat-conducting component 42 and the stator winding 1. Applying thermally conductive silicone between the heat-conducting component 42 and the stator winding 1 enables initial fixation between them, maintaining relative stability before the epoxy resin fully cures, and providing stability assurance for the temperature measurement accuracy of the temperature measuring device 4.

[0047] Specifically, the assembly process of the epoxy resin cast motor of this application is as follows: First, the temperature measuring element 41 and the heat conducting element 42 are assembled and fixed. Then, thermally conductive silicone is applied to the concave part 4211 of the first heat conducting surface 421. The temperature measuring device 4 is then fastened to the electromagnetic coil 12 of the stator winding 1. The electromagnetic coil 12 abuts against the concave part 4211. At this time, the temperature measuring device 4 achieves initial fixation with the stator winding 1. Then, the housing 2 is fastened to the outside of the stator winding 1. The transmission wire 412 of the temperature measuring element 41 is led out from the outlet hole 21 of the housing 2 and connected to the temperature control module of the motor. The housing 2 has a filling hole. Epoxy resin is poured into the filling cavity 3 through the filling hole until the filling cavity 3 is full. After the epoxy resin has cured and stabilized, the assembly of the motor is completed.

[0048] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0049] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0050] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A high-accuracy epoxy resin cast motor, characterized in that, It includes a stator winding and a housing sleeved on the stator winding, wherein there is a filling cavity for injecting epoxy resin between the housing and the stator winding, and the filling cavity is filled with epoxy resin. The stator winding includes a stator and an electromagnetic coil wound on the stator. The injection cavity is provided with a temperature measuring device that abuts against the stator winding. The temperature measuring device includes a temperature measuring element and a heat-conducting element. The temperature measuring element is installed on the heat-conducting element. The heat-conducting element has a first heat-conducting surface that abuts against the electromagnetic coil and a second heat-conducting surface that abuts against the temperature measuring element. The first heat-conducting surface has an inner concave portion that is adapted to the electromagnetic coil.

2. The epoxy resin casting motor with high temperature measurement accuracy according to claim 1, characterized in that, The stator winding includes multiple electromagnetic coils, and the number of the recesses corresponds to the number of electromagnetic coils.

3. The epoxy resin casting motor with high temperature measurement accuracy according to claim 1, characterized in that, The temperature measuring element includes a temperature measuring probe and a transmission wire. The temperature measuring probe has a first positioning hole, and the heat-conducting element has a second positioning hole corresponding to the first positioning hole. The temperature measuring probe and the heat-conducting element are connected by positioning elements that pass through the first positioning hole and the second positioning hole in sequence.

4. The epoxy resin casting motor with high temperature measurement accuracy according to claim 3, characterized in that, The projection of the temperature probe toward the heat-conducting component falls entirely on the heat-conducting component.

5. The epoxy resin casting motor with high temperature measurement accuracy according to claim 3, characterized in that, The casing has an outlet hole for the transmission wire to pass through.

6. The epoxy resin casting motor with high temperature measurement accuracy according to claim 1, characterized in that, The epoxy resin casting motor includes multiple stator windings, which are coaxially arranged and each is equipped with the temperature measuring device.

7. The epoxy resin casting motor with high temperature measurement accuracy according to claim 6, characterized in that, The temperature measuring devices on two adjacent stator windings are arranged in a staggered manner.

8. The epoxy resin casting motor with high temperature measurement accuracy according to claim 1, characterized in that, The heat-conducting component has a sheet-like structure and is made of thermally conductive ceramic.

9. The epoxy resin casting motor with high temperature measurement accuracy according to claim 8, characterized in that, Thermally conductive silicone is applied between the heat-conducting component and the stator winding.

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