Temperature monitoring mechanism of oil-cooled motor and oil-cooled motor thereof

Abstract

The utility model discloses a temperature monitoring mechanism of an oil-cooled motor and the oil-cooled motor thereof, comprising a packaging assembly in which a temperature sensor and a heat-conducting copper bar which are in contact with each other are arranged; a part of the heat conduction copper bar is exposed outside the packaging assembly, and the exposed part of the heat conduction copper bar is in butt welding connection with an exposed busbar copper bar of the flat wire winding. The temperature sensor and the heat-conducting copper bar are packaged into a sealed whole, so that the vibration resistance of the temperature sensor and the heat-conducting copper bar is enhanced, the temperature sensor is completely isolated from external cooling oil, and the condition of poor temperature monitoring is avoided.

Description

Technical Field

[0001] This utility model relates to the field of flat wire winding temperature detection technology, specifically to a temperature monitoring mechanism for an oil-cooled motor and the oil-cooled motor thereof. Background Technology

[0002] The mounting scheme for the temperature sensor of the oil-cooled motor is crucial for monitoring the temperature of the motor windings, and indirectly affects the thermal system management and control of the motor.

[0003] For flat-wire motors, the temperature sensor is typically secured by binding wire, which ties the sensor's sensing element to the beveled edge of the hairpin end of the flat wire winding. During use, this can lead to several issues. First, the binding may be insecure, or the sensor may detach under vibration, preventing continued monitoring of the winding temperature and potentially causing the motor to burn out. Second, the binding wire may be too loose or too tight, resulting in inconsistent contact between the sensor's sensing element and the hairpin, leading to significant temperature discrepancies and temperature distortion.

[0004] Furthermore, in oil-cooled motor systems, the temperature sensor is exposed to an oil-spraying environment, where cooling oil is directly sprayed onto the temperature sensor. This causes the temperature detected by the temperature sensor to be different from the actual temperature of the motor windings, making it impossible to monitor the motor winding temperature in a timely manner. Utility Model Content

[0005] The technical problem to be solved by this invention is how to effectively monitor the temperature of motor windings.

[0006] In a first aspect, to solve the above-mentioned technical problems, this utility model provides a temperature monitoring mechanism for an oil-cooled motor, including an encapsulation assembly, wherein:

[0007] The encapsulation component contains temperature sensors and thermally conductive copper busbars that are in contact with each other.

[0008] The external portion of the heat-conducting copper busbar is exposed on the outside of the encapsulation component, and the exposed portion of the heat-conducting copper busbar is butt-welded to the exposed busbar copper busbar of the flat wire winding.

[0009] Furthermore, the electrodes of the temperature sensor are fixed to the surface of the thermally conductive copper busbar using thermally conductive adhesive.

[0010] Furthermore, the thermally conductive copper busbar is of similar size to the busbar copper busbar.

[0011] Furthermore, the encapsulation assembly also includes an injection molded part that injection molds the temperature sensor and the thermally conductive copper busbar, which are in contact with each other, into a sealed whole.

[0012] Furthermore, the injection molded part is made of PA66-GF30 material.

[0013] Furthermore, the injection-molded part has a square structure.

[0014] In a second aspect, this utility model provides an oil-cooled motor, including a stator winding, wherein a temperature monitoring mechanism for the oil-cooled motor is fixed to the stator winding.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention encapsulates the temperature sensor and the thermally conductive copper busbar into a sealed unit, enhancing the vibration resistance of the temperature sensor and the thermally conductive copper busbar, while completely isolating the temperature sensor from external cooling oil, thus avoiding poor temperature monitoring. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the packaging component disclosed in an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure in which the encapsulation component is fixedly connected to the busbar copper bus as disclosed in an embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the stator core structure disclosed in an embodiment of the present utility model.

[0020] In the diagram: 10, encapsulation component; 11, temperature sensor; 12, thermally conductive copper busbar; 13, injection molded part; 20, busbar copper busbar; 30, stator core. Detailed Implementation

[0021] To make the technical solutions and effects of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0022] The first aspect of this utility model aims to provide a temperature monitoring mechanism for an oil-cooled motor. On the one hand, it solves the problem that using a binding wire to bind the temperature sensor sensing part to the inclined side of the hairpin end of the winding flat wire results in poor shock resistance and easy detachment. On the other hand, it solves the drawback that inconsistent contact between the temperature sensor sensing part and the hairpin leads to temperature detection distortion. In addition, it also solves the problem that when the temperature sensor is exposed to an oil-spraying environment, the cooling oil is directly sprayed onto the temperature sensor, causing the temperature detected by the temperature sensor to be different from the actual temperature of the motor winding.

[0023] Please see Figure 1It mainly includes an encapsulation component 10, inside which a temperature sensor 11 and a thermally conductive copper busbar 12 are in contact with each other; a portion of the thermally conductive copper busbar 12 is exposed on the outside of the encapsulation component 10, and the exposed portion of the thermally conductive copper busbar 12 is butt-welded to the exposed busbar copper busbar 20 of the flat wire winding.

[0024] In a further embodiment, the electrodes of the temperature sensor 11 are fixed to the surface of the thermally conductive copper busbar 12 with thermally conductive adhesive, ensuring that the temperature sensor 11 can directly contact the thermally conductive copper busbar 12, so that heat can be quickly conducted between the temperature sensor 11 and the thermally conductive copper busbar 12.

[0025] The thermally conductive copper busbar 12 is approximately the same size as the busbar copper busbar 20. Preferably, the thermally conductive copper busbar 12 is 3mm*10mm*20mm in size, because most of the busbar copper busbars 20 for flat wire motors on the market are of this size, which facilitates efficient heat conduction.

[0026] The encapsulation assembly 10 also includes an injection molded part 13, which molds the temperature sensor 11 and the thermally conductive copper busbar 12, which are in contact with each other, into a sealed whole. On the one hand, because the electrodes of the temperature sensor 11 are wrapped by the injection molded part 13, the temperature sensor 11 is completely isolated from the external cooling oil, preventing external cooling oil from dripping onto the temperature sensor 11 and thus avoiding poor temperature monitoring. On the other hand, compared with fixing the temperature sensor 11 to the winding and then sealing it with glue, this embodiment has higher reliability and can also simplify the production process.

[0027] Preferably, the injection molded part 13 is made of PA66-GF30 material.

[0028] The injection molded part 13 has a square structure. The square injection molded part 13 can firmly attach the temperature sensor 11 to the heat-conducting copper busbar 12. Compared with the method of using cable ties and fixing clips, this embodiment is more reliable and has stronger vibration resistance.

[0029] Please see Figure 2 The exposed thermally conductive copper busbar 12 in the encapsulation component 10 is welded to the exposed busbar copper busbar 20 of the flat wire winding. In this way, the temperature of the flat wire winding is conducted to the thermally conductive copper busbar 12 through the busbar copper busbar 20, and the temperature sensor 11 can indirectly monitor the temperature of the flat wire winding by directly detecting the temperature of the thermally conductive copper busbar 12.

[0030] It should be noted that when the thermally conductive copper busbar 12 and the busbar copper busbar 20 are butt-welded, the resistance value of the two copper busbars after butt welding should be minimized to avoid the influence of the welding part on heat conduction, which in turn affects the temperature detection accuracy of the new temperature sensor module.

[0031] Welding can be performed using resistance welding or laser welding. For the loosening failure mode that occurs when using cable ties and clips to secure the thermally conductive copper busbar 12 and the busbar copper busbar 20, welding is a more reliable connection method.

[0032] Please see Figure 3 The busbar copper busbar 20, with the encapsulation component 10 welded on, is fixed to the stator winding. By monitoring the temperature of the temperature sensor 11, the temperature of the motor winding can be monitored. Because the temperature sensor 11 is encased in the injection molded part 13, it is not affected by the external cooling oil, so it can accurately reflect the temperature of the motor winding.

[0033] In this embodiment, the thermally conductive copper busbar 12 and the electrode side of the temperature sensor 11 are integrally injection molded, forming a sealed square package assembly 10 consisting of the temperature sensor 11 electrode, the thermally conductive copper busbar 12, and the injection molded part 13. The package assembly 10 and the busbar copper busbar 20 are then welded together, avoiding the problems of poor temperature detection consistency and detachment caused by the use of cable ties and fixing clips, which are not vibration-resistant and prone to loosening.

[0034] A second aspect of this utility model aims to provide an oil-cooled motor, including a stator winding, on which the temperature monitoring mechanism of the aforementioned oil-cooled motor is fixed.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temperature monitoring mechanism for an oil-cooled motor, characterized in that, Includes encapsulated component (10), wherein: The encapsulation component (10) is internally provided with a temperature sensor (11) and a thermally conductive copper busbar (12) that are in contact with each other. The external portion of the heat-conducting copper busbar (12) of the encapsulation assembly (10) is exposed, and the exposed portion of the heat-conducting copper busbar (12) is butt-welded to the exposed busbar copper busbar (20) of the flat wire winding.

2. The temperature monitoring mechanism for an oil-cooled motor according to claim 1, characterized in that, The busbar copper bus (20) with the encapsulation assembly (10) welded on is fixed to the stator winding.

3. The temperature monitoring mechanism for the oil-cooled motor according to claim 1, characterized in that, The electrodes of the temperature sensor (11) are fixed to the surface of the thermally conductive copper busbar (12) by thermally conductive adhesive.

4. The temperature monitoring mechanism for an oil-cooled motor according to claim 1, characterized in that, The thermally conductive copper busbar (12) is of similar size to the busbar copper busbar (20).

5. The temperature monitoring mechanism for an oil-cooled motor according to claim 1, characterized in that, The encapsulation assembly (10) also includes an injection molding component (13) which injection molds the temperature sensor (11) and the thermally conductive copper busbar (12) that are in contact with each other into a sealed whole.

6. The temperature monitoring mechanism for an oil-cooled motor according to claim 5, characterized in that, The injection molded part (13) is made of PA66-GF30 material.

7. The temperature monitoring mechanism for an oil-cooled motor according to claim 5, characterized in that, The injection molded part (13) has a square structure.

8. An oil-cooled motor, characterized in that, It includes a stator winding, wherein the stator winding is fixed with a temperature monitoring mechanism for an oil-cooled motor as described in any one of claims 1-7.

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