Precise temperature measurement structure of flat wire oil-cooled motor winding

Abstract

The utility model discloses a flat wire oil-cooled motor winding accurate temperature measurement structure, which comprises a foaming silicon rubber case, a flat wire winding and a temperature sensor, the temperature sensor comprises a temperature sensor lead and a temperature sensor probe, the temperature sensor probe is positioned in the foaming silicon rubber case at the front end of the flat wire winding, and the foaming silicon rubber case is positioned in the flat wire winding. The temperature sensor probe and the flat wire winding are tightly attached, the contact position of the temperature sensor probe and the flat wire winding is coated with heat conduction silicone grease, and the outlet position of the foaming silicon rubber sleeve is bound. According to the utility model, the probe of the temperature sensor is tightly attached to the flat wire winding, the heat transfer path is short, the temperature measurement is accurate, the foaming silica gel sleeve is arranged to protect the temperature sensor, cooling oil is prevented from being directly sprayed on the temperature sensor to influence the temperature measurement effect, and the temperature of the flat wire oil-cooled motor winding can be accurately measured. The temperature sensor is simple in structure, good in manufacturability, low in cost and suitable for large-scale popularization and application.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil-cooled motors, and particularly relates to a precise temperature measurement structure for a flat-wire oil-cooled motor winding. Background Art

[0002] With the acceleration of the electrification process in the automotive industry, the market's performance requirements for drive motors are getting higher and higher, and the temperature rise problem of high-performance motors has become more serious. How to reliably and accurately monitor the temperature rise of the motor to adjust the operating state of the motor is related to the operating life of the motor and even the safety of the entire vehicle. At present, the temperature monitoring of the drive motor generally uses thermistor temperature sensors such as PT1000, and the temperature sensor is attached to the winding terminal and fixed with a binding rope. However, this monitoring method has the following problems:

[0003] 1. The current temperature sensor is fixed on the flat wire winding. There may be a gap between the temperature sensor and the winding, so that the sensor cannot be well attached to the winding;

[0004] 2. The cooling oil of the oil-cooled motor is sprayed directly onto the temperature sensor and the winding. The temperature sensor measures the temperature of the cooling oil instead of the temperature of the winding, resulting in inaccurate temperature measurement.

[0005] Chinese patent announcement number: CN115441670A discloses a temperature sensor installation method and a flat wire stator for accurately detecting the temperature of electric wire motors. The solution adds an embedded part to the twisting part of the flat wire winding, and then coats the embedded part and the flat wire stator as a whole. After the coating is completed, the embedded part is removed, and the temperature sensor is coated with thermal conductive glue and placed in the accommodating cavity, thereby achieving the purpose of measuring the temperature of the flat wire winding.

[0006] However, the above solution has the following defects:

[0007] 1. It is necessary to make embedded pipes, which are embedded first and then taken out, and the process flow is relatively complicated;

[0008] 2. There is coating powder between the temperature sensor and the flat wire winding, the heat transfer path is long and the thermal resistance is large;

[0009] 3. Cooling oil can directly act on the temperature sensor, causing the temperature of the temperature sensor to drop, affecting the accuracy of the measured temperature. Utility Model Content

[0010] The main purpose of the utility model is to provide a flat wire oil-cooled motor winding accurate temperature measurement structure, which solves the current problem of monitoring the temperature rise of the oil-cooled motor, which requires the production of embedded pipes, has a complicated process flow, and has a long heat transfer path between the temperature sensor and the flat wire winding, resulting in large thermal resistance.

[0011] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a precise temperature measurement structure for a flat wire oil-cooled motor winding, comprising a foamed silicone sleeve, a flat wire winding and a temperature sensor, the temperature sensor comprising a temperature sensor lead and a temperature sensor probe, the front end of the flat wire winding and the temperature sensor probe are located in the foamed silicone sleeve, the temperature sensor probe and the flat wire winding are closely arranged, the contact position between the temperature sensor probe and the flat wire winding is coated with thermal conductive silicone grease, and the outlet position of the foamed silicone sleeve is tied and arranged.

[0012] Furthermore, the foam rubber sleeve is made of heat-insulating, temperature-resistant and oil-resistant material.

[0013] Furthermore, the thermally conductive silicone grease is an oil-resistant thermally conductive material.

[0014] Furthermore, the outlet position of the foamed silicone sleeve is tied with a tightening belt.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model sets the temperature sensor probe and the flat wire winding in close contact, so that the heat transfer path is short and the accuracy of the measurement result is increased;

[0017] 2. The utility model can protect the temperature sensor by setting a foamed silicone sleeve, preventing the cooling oil from spraying directly onto the temperature sensor to affect the temperature measurement effect, and can accurately measure the temperature of the flat wire oil-cooled motor winding;

[0018] 3. The utility model realizes accurate temperature measurement of the temperature sensor by adding a foamed silicone sleeve, and has a simple structure, good processability and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a flat wire oil-cooled motor winding accurate temperature measurement structure of the utility model;

[0020] Figure 2 It is a front cross-sectional schematic diagram of a flat wire oil-cooled motor winding accurate temperature measurement structure of the utility model;

[0021] Figure 3 The utility model is a side sectional schematic diagram of a flat wire oil-cooled motor winding accurate temperature measurement structure.

[0022] In the figure: 1. Foam silicone sleeve; 2. Fastening belt; 3. Flat wire winding; 4. Temperature sensor lead; 5. Thermal grease; 6. Temperature sensor probe. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1 , Figure 2 and Figure 3 The utility model discloses a precise temperature measurement structure for a flat wire oil-cooled motor winding, comprising a foamed silicone sleeve 1, a flat wire winding 3 and a temperature sensor, wherein the temperature sensor comprises a temperature sensor lead 4 and a temperature sensor probe 6, the front end of the flat wire winding 3 and the temperature sensor probe 6 are both located in the foamed silicone sleeve 1, the temperature sensor probe 6 and the flat wire winding 3 are closely arranged, the temperature sensor probe 6 and the flat wire winding 3 are closely fitted, the heat transfer path is short, and the measurement accuracy is increased. Optionally, the foamed rubber sleeve 1 is made of heat-insulating, temperature-resistant, and oil-resistant materials. The foamed silicone sleeve 1 can protect the temperature sensor probe 6 and the flat wire winding 3, and prevent the cooling oil from being directly sprayed onto the temperature sensor, so that the measurement result is more accurate.

[0025] Optionally, the position where the temperature sensor probe 6 is fixed on the flat wire winding 3 is not limited to the position shown in the figure, and can be adjusted according to actual installation requirements.

[0026] Optionally, the angle relationship between the temperature sensor probe 6 and the flat wire winding 3 is not limited to the illustrated situation, and can be adjusted according to the outlet direction of the temperature sensor lead wire 4 .

[0027] Further, see Figure 3 The contact position between the temperature sensor probe 6 and the flat wire winding 3 is coated with thermal grease 5. The setting of the thermal grease 5 can prevent the air in the gap from increasing the thermal resistance, and can effectively ensure the consistency between the measured temperature of the temperature sensor and the temperature to be measured of the heat source of the flat wire winding 3.

[0028] Optionally, the thermal grease 5 may be other thermally conductive media, such as oil-resistant thermally conductive materials, and may be adjusted according to actual conditions in actual use.

[0029] Furthermore, the exit position of the foamed silicone sleeve 1 is bound with a fastening belt 2. The provision of the fastening belt 2 can fix the flat wire winding 3 and the temperature sensor probe 6 to prevent them from loosening.

[0030] The specific implementation of the utility model is as follows: firstly, the temperature sensor probe 6 is closely attached to the flat wire winding 3, and then the gap between the temperature sensor probe 6 and the flat wire winding 3 is filled with thermal conductive silicone grease 5 to prevent the air in the gap from increasing the thermal resistance, and then the temperature sensor and the flat wire winding 3 are installed with the foamed silicone sleeve 1, and the outlet of the foamed silicone sleeve 1 is tied and fixed with the fastening belt 2. The utility model closely fits the temperature sensor probe 6 with the flat wire winding 3, has a short heat transfer path, and accurately measures the temperature. The temperature sensor is protected by the foamed silicone sleeve 1 to prevent the cooling oil from being directly sprayed onto the temperature sensor to affect the temperature measurement effect. The temperature of the flat wire oil-cooled motor winding can be accurately measured, and the temperature sensor can be accurately measured. The temperature measurement is realized with a simple structure, good processability, and low cost.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flat wire oil-cooled motor winding accurate temperature measurement structure, characterized by: The invention comprises a foamed silicone sleeve (1), a flat wire winding (3) and a temperature sensor, wherein the temperature sensor comprises a temperature sensor lead (4) and a temperature sensor probe (6), the front end of the flat wire winding (3) and the temperature sensor probe (6) are located in the foamed silicone sleeve (1), the temperature sensor probe (6) and the flat wire winding (3) are arranged in close contact, the contact position between the temperature sensor probe (6) and the flat wire winding (3) is coated with thermal conductive silicone grease (5), and the outlet position of the foamed silicone sleeve (1) is tied and arranged.

2. According to claim 1, a flat wire oil-cooled motor winding accurate temperature measurement structure is characterized by: The foamed silica gel sleeve (1) is made of heat-insulating, temperature-resistant and oil-resistant material.

3. The flat wire oil-cooled motor winding accurate temperature measurement structure according to claim 1 is characterized by: The thermally conductive silicone grease (5) is an oil-resistant thermally conductive material.

4. The flat wire oil-cooled motor winding accurate temperature measurement structure according to claim 1 is characterized by: The outlet position of the foamed silica gel sleeve (1) is tied by a fastening belt (2).

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