Motor cooling method and device

Abstract

The embodiment of the invention provides a motor cooling method and device, and the method comprises the steps: obtaining target adjustment temperature values at different positions in a motor operation link under the condition that the working temperature of a motor is in a normal operation temperature range, and carrying out the cooling of the motor according to the target adjustment temperature values and the operation state of the motor, a cooling strategy corresponding to the target adjusting temperature value is determined; according to the embodiment of the invention, different temperature values in a motor operation link are acquired in real time, so that the cooling strategy can be determined in advance according to the acquired temperature values and the working state of motor operation, and the working temperature of the motor is enabled to be within the normal operation temperature range. The temperature of the cooling water is adjusted in real time according to cooling, the motor can be ensured to be within a specified temperature range, time is saved, and cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a motor cooling method and device. Background Art

[0002] At present, during the testing or operation of automobiles, the heat exchange form of the oil-cooled motor is mostly an external heat exchanger. Since the heat generated by the oil-cooled motor in different working conditions is different, the temperature of the cooling water set in the existing heat exchanger is fixed. If the temperature of the oil-cooled motor is too high, the cooling water needs to wait for a long time to keep the operating temperature of the oil-cooled motor within the normal range. This not only consumes too much time, but also the continuous high temperature of the oil-cooled motor can easily cause the motor performance to decline. Therefore, how to make the oil-cooled motor always work within the normal temperature is an urgent problem to be solved. Summary of the invention

[0003] Some embodiments of the present application aim to provide a motor cooling method and device, by obtaining target adjustment temperature values ​​at different positions in a motor operation link when the operating temperature of the motor is within a normal operating temperature range; determining a cooling strategy corresponding to the target adjustment temperature value according to the target adjustment temperature value and the working state of the motor; and controlling the cooling system to execute the cooling strategy so that the working temperature of the motor is within a normal operating temperature range. The embodiments of the present application obtain different temperature values ​​in the motor operation link in real time, so that the cooling strategy can be determined in advance according to the obtained temperature values ​​and the working state of the motor, and the cooling water temperature can be adjusted in real time according to the cooling, so as to ensure that the motor is within the specified temperature range, saving time and reducing costs.

[0004] In a first aspect, some embodiments of the present application provide a motor cooling method, comprising:

[0005] When the operating temperature of the motor is within the normal operating temperature range, obtaining target adjustment temperature values ​​at different positions in the motor operation link;

[0006] Determining a cooling strategy corresponding to the target adjustment temperature value according to the target adjustment temperature value and the working state of the motor;

[0007] The cooling system is controlled to execute the cooling strategy so that the operating temperature of the motor is within the normal operating temperature range.

[0008] Some embodiments of the present application acquire different temperature values ​​in the motor operation link in real time. In this way, the cooling strategy can be determined in advance based on the acquired temperature values ​​and the working status of the motor, and the cooling water temperature can be adjusted in real time according to the cooling. This can ensure that the motor is within the specified temperature range, saving time and reducing costs.

[0009] Optionally, the step of obtaining target adjustment temperature values ​​at different positions in the motor operation link includes:

[0010] Acquire a first temperature value and a second temperature value at different positions in the motor operation link;

[0011] The target adjustment temperature value is determined according to the first temperature value and the second temperature value.

[0012] Optionally, determining the target adjustment temperature value according to the first temperature value and the second temperature value includes:

[0013] Determining a first difference value corresponding to the first temperature value according to a first temperature value of the motor and a first cooling threshold;

[0014] Determine a second difference value corresponding to the second temperature value according to the second temperature value of the reducer and the second cooling threshold;

[0015] The target adjustment temperature value is determined according to the first difference and the second difference.

[0016] Optionally, determining the target adjustment temperature value according to the first difference and the second difference includes:

[0017] If the first difference is greater than the second difference, a first temperature value corresponding to the first difference is determined as the target adjustment temperature value.

[0018] Some embodiments of the present application obtain temperature values ​​at multiple different locations, and determine the temperature value that is closer to the critical value as the target adjustment temperature value, and then determine the corresponding cooling strategy based on the adjustment temperature value to improve cooling control.

[0019] Optionally, determining a cooling strategy corresponding to the target adjustment temperature value according to the target adjustment temperature value and the working state of the motor includes:

[0020] A cooling strategy corresponding to the target adjustment temperature value is determined according to the size of the target adjustment temperature value and the working state of the motor, wherein the cooling strategy at least includes controlling the cooling system to increase, decrease or keep the preset cooling water temperature unchanged.

[0021] In some embodiments of the present application, a real-time temperature value is obtained, and then a corresponding strategy is determined according to the working state of the motor, so that the motor can operate within a normal temperature range.

[0022] Optionally, the controlling the cooling system to execute the cooling strategy so that the operating temperature of the motor is within a normal operating temperature range includes:

[0023] When the first difference is less than a first preset value, the cooling system is controlled to increase or decrease the preset cooling water temperature by a first adjustment value.

[0024] Some embodiments of the present application control the cooling system to adjust the cooling water temperature accordingly according to the magnitude of the temperature change, so that the motor can operate within a normal temperature range.

[0025] Optionally, the controlling the cooling system to execute the cooling strategy so that the operating temperature of the motor is within a normal operating temperature range includes:

[0026] When the first difference is greater than or equal to a first preset value, the cooling system is controlled to increase or decrease the preset cooling water temperature by a second adjustment value, wherein the second adjustment value is greater than the first adjustment value.

[0027] Some embodiments of the present application control the cooling system to adjust the cooling water temperature accordingly according to the magnitude of the temperature change when it is detected that the temperature value is greater than or equal to a preset value, so that the motor can operate within a normal temperature range.

[0028] Optionally, different positions in the motor operation link include at least one or more of a cooling oil channel, a motor, a reducer, an oil reservoir, an oil pump, an oil filter and a cooling water circuit.

[0029] Some embodiments of the present application can improve the accuracy of temperature regulation by acquiring temperature values ​​at different locations in the operating link.

[0030] Optionally, the method further comprises:

[0031] When the operating temperature of the motor is greater than the normal operating temperature range, the cooling system is controlled to adjust the preset cooling water temperature to a third preset value according to the operating state of the motor.

[0032] Some embodiments of the present application control the cooling system to adjust the preset cooling water temperature to a third preset value according to the operating state of the motor when the operating temperature of the motor is greater than the normal operating temperature range, so as to adjust the temperature of the cooling water in time so that the motor can operate normally as soon as possible.

[0033] Optionally, the working state of the motor includes at least one of low-speed operation, stable operation, high-speed operation and high-load operation.

[0034] Some embodiments of the present application comprehensively consider the operating status of the motor, judge the future temperature rise based on the current temperature and working conditions, and pre-set the cooling system, thereby greatly improving the motor efficiency and shortening the test time during the test.

[0035] In a second aspect, some embodiments of the present application provide a motor cooling device, including:

[0036] An acquisition module, used for acquiring target adjustment temperature values ​​at different positions in the motor operation link when the operating temperature of the motor is within the normal operating temperature range;

[0037] A determination module, configured to determine a cooling strategy corresponding to the target adjustment temperature value according to the target adjustment temperature value and the working state of the motor;

[0038] The control module is used to control the cooling system to execute the cooling strategy so that the operating temperature of the motor is within the normal operating temperature range.

[0039] Some embodiments of the present application acquire different temperature values ​​in the motor operation link in real time. In this way, the cooling strategy can be determined in advance based on the acquired temperature values ​​and the working status of the motor, and the cooling water temperature can be adjusted in real time according to the cooling. This can ensure that the motor is within the specified temperature range, saving time and reducing costs.

[0040] Optionally, the acquisition module is used to:

[0041] Acquire a first temperature value and a second temperature value at different positions in the motor operation link;

[0042] A target adjustment temperature value is determined according to the first temperature value and the second temperature value.

[0043] Optionally, the acquisition module is used to:

[0044] Determining a first difference value corresponding to the first temperature value according to a first temperature value of the motor and a first cooling threshold;

[0045] Determine a second difference value corresponding to the second temperature value according to the second temperature value of the reducer and the second cooling threshold;

[0046] The target adjustment temperature value is determined according to the first difference and the second difference.

[0047] Optionally, the judging module is used to:

[0048] If the first difference is greater than the second difference, a first temperature value corresponding to the first difference is determined as the target adjustment temperature value.

[0049] Some embodiments of the present application obtain temperature values ​​at multiple different locations, and determine the temperature value that is closer to the critical value as the target adjustment temperature value, and then determine the corresponding cooling strategy based on the adjustment temperature value to improve cooling control.

[0050] Optionally, the determining module is used to:

[0051] A cooling strategy corresponding to the target adjustment temperature value is determined according to the size of the target adjustment temperature value and the working state of the motor, wherein the cooling strategy at least includes controlling the cooling system to increase, decrease or keep the preset cooling water temperature unchanged.

[0052] In some embodiments of the present application, a real-time temperature value is obtained, and then a corresponding strategy is determined according to the working state of the motor, so that the motor can operate within a normal temperature range.

[0053] Optionally, the control module is used to:

[0054] When the first difference is less than a first preset value, the cooling system is controlled to increase or decrease the preset cooling water temperature by a first adjustment value.

[0055] Some embodiments of the present application control the cooling system to adjust the cooling water temperature accordingly according to the magnitude of the temperature change, so that the motor can operate within a normal temperature range.

[0056] Optionally, the control module is used to:

[0057] When the first difference is greater than or equal to a first preset value, the cooling system is controlled to increase or decrease the preset cooling water temperature by a second adjustment value, wherein the second adjustment value is greater than the first adjustment value.

[0058] Some embodiments of the present application control the cooling system to adjust the cooling water temperature accordingly according to the magnitude of the temperature change when it is detected that the temperature value is greater than or equal to a preset value, so that the motor can operate within a normal temperature range.

[0059] Optionally, different positions in the motor operation link include at least one or more of a cooling oil channel, a motor, a reducer, an oil reservoir, an oil pump, an oil filter and a cooling water circuit.

[0060] Some embodiments of the present application can improve the accuracy of temperature regulation by acquiring temperature values ​​at different locations in the operating link.

[0061] Optionally, the control module is used to:

[0062] When the operating temperature of the motor is greater than the normal operating temperature range, the cooling system is controlled to adjust the preset cooling water temperature to a third preset value according to the operating state of the motor.

[0063] Some embodiments of the present application control the cooling system to adjust the preset cooling water temperature to a third preset value according to the operating state of the motor when the operating temperature of the motor is greater than the normal operating temperature range, so as to adjust the temperature of the cooling water in time so that the motor can operate normally as soon as possible.

[0064] Optionally, the working state of the motor includes at least one of low-speed operation, stable operation, high-speed operation and high-load operation.

[0065] Some embodiments of the present application comprehensively consider the operating status of the motor, judge the future temperature rise based on the current temperature and working conditions, and pre-set the cooling system, thereby greatly improving the motor efficiency and shortening the test time during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the technical solutions of some embodiments of the present application, the drawings required for use in some embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0067] Figure 1 A schematic diagram of a flow chart of a motor cooling method provided in an embodiment of the present application;

[0068] Figure 2 A schematic diagram of the structure of a cooling system provided in an embodiment of the present application;

[0069] Figure 3 A schematic diagram of the structure of a motor cooling device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0070] The technical solutions in some embodiments of the present application will be described below in conjunction with the drawings in some embodiments of the present application.

[0071] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0072] At present, during the testing or operation of automobiles, the heat exchange form of oil-cooled motors mostly adopts external heat exchangers. Since the heat generated by oil-cooled motors in different working conditions is different, the temperature of cooling water set in existing heat exchangers is fixed. If the temperature of the oil-cooled motor is too high, the cooling water needs to wait for a long time to keep the working temperature of the oil-cooled motor within the normal range. This not only consumes too much time, but also the continuous high temperature of the oil-cooled motor can easily cause the motor performance to decline. Therefore, how to make the oil-cooled motor always work within the normal temperature is an urgent problem to be solved. In view of this, some embodiments of the present application provide a motor cooling method. The method includes obtaining target adjustment temperature values ​​at different positions in the motor operation link when the operating temperature of the motor is within the normal operating temperature range; determining a cooling strategy corresponding to the target adjustment temperature value according to the target adjustment temperature value and the working state of the motor; and controlling the cooling system to execute the cooling strategy so that the working temperature of the motor is within the normal operating temperature range. The embodiment of the present application obtains different temperature values ​​in the motor operation link in real time. In this way, the cooling strategy can be determined in advance according to the obtained temperature values ​​and the working state of the motor, and the cooling water temperature can be adjusted in real time according to the cooling, so as to ensure that the motor is within the specified temperature range, saving time and reducing costs.

[0073] like Figure 1 As shown, an embodiment of the present application provides a motor cooling method, the method comprising:

[0074] S101, when the operating temperature of the motor is within the normal operating temperature range, obtaining target adjustment temperature values ​​at different positions in the motor operation link;

[0075] Specifically, the embodiments of the present application are applied to Figure 2 As shown in the structural schematic diagram of the cooling system, the motor is connected to the controller and the cooling system respectively. The cooling system provides cooling water for the motor. Temperature sensors are arranged at different positions in the motor chain. The temperature sensors send the collected temperature values ​​to the controller. The controller obtains one or more temperature values ​​according to the temperature sensor and determines the target adjustment temperature value.

[0076] S102, determining a cooling strategy corresponding to the target adjustment temperature value according to the target adjustment temperature value and the working state of the motor;

[0077] The controller determines a cooling strategy corresponding to the target adjustment temperature value according to the acquired target adjustment temperature value and the operation of the motor. For example, the controller can control the cooling system to increase, decrease or keep the preset cooling water temperature unchanged.

[0078] S103: Control the cooling system to execute a cooling strategy so that the operating temperature of the motor is within a normal operating temperature range.

[0079] Specifically, when the motor is operating within the normal operating temperature range, the temperature value in the link is obtained in real time, and the cooling strategy is determined based on the temperature value and the working status of the motor. The controller controls the cooling system to adjust the preset cooling water temperature according to the cooling strategy, and cools down the oil in the motor link in advance to prevent the temperature of the motor from exceeding the normal operating temperature range.

[0080] Some embodiments of the present application acquire different temperature values ​​in the motor operation link in real time. In this way, the cooling strategy can be determined in advance based on the acquired temperature values ​​and the working status of the motor, and the cooling water temperature can be adjusted in real time according to the cooling. This can ensure that the motor is within the specified temperature range, saving time and reducing costs.

[0081] Another embodiment of the present application further supplements the motor cooling method provided in the above embodiment.

[0082] Optionally, the step of obtaining target adjustment temperature values ​​at different positions in the motor operation link includes:

[0083] Acquire a first temperature value and a second temperature value at different positions in the motor operation link;

[0084] The target adjustment temperature value is determined according to the first temperature value and the second temperature value.

[0085] Optionally, determining the target adjustment temperature value according to the first temperature value and the second temperature value includes:

[0086] Determining a first difference value corresponding to the first temperature value according to a first temperature value of the motor and a first cooling threshold;

[0087] Determine a second difference value corresponding to the second temperature value according to the second temperature value of the reducer and the second cooling threshold;

[0088] The target adjustment temperature value is determined according to the first difference and the second difference.

[0089] Optionally, determining the target adjustment temperature value according to the first difference and the second difference includes:

[0090] If the first difference is greater than the second difference, a first temperature value corresponding to the first difference is determined as the target adjustment temperature value.

[0091] Specifically, a sensor can be set in each component in the motor chain, and multiple sensors can be set in each component as needed. In the case of multiple sensors, multiple temperature values ​​are obtained, and a temperature value with a larger difference from the normal operating temperature is selected to be determined as the target adjustment temperature value. In other words, the worst temperature is selected as the target adjustment temperature value.

[0092] For example, if the two temperature values ​​collected by the two temperature sensors in the motor are 78 degrees and 89 degrees, and the normal operating temperature of the motor is 75-90 degrees, the temperature value collected by the temperature sensor of 95 degrees is used as the target adjustment temperature value.

[0093] Some embodiments of the present application obtain temperature values ​​at multiple different locations, and determine the temperature value that is closer to the critical value as the target adjustment temperature value, and then determine the corresponding cooling strategy based on the adjustment temperature value to improve cooling control.

[0094] Optionally, according to the target adjustment temperature value and the working state of the motor, a cooling strategy corresponding to the target adjustment temperature value is determined, including:

[0095] According to the size of the target adjustment temperature value and the working state of the motor, a cooling strategy corresponding to the target adjustment temperature value is determined, wherein the cooling strategy at least includes controlling the cooling system to increase, decrease or keep the preset cooling water temperature unchanged.

[0096] In some embodiments of the present application, a real-time temperature value is obtained, and then a corresponding strategy is determined according to the working state of the motor, so that the motor can operate within a normal temperature range.

[0097] Optionally, controlling the cooling system to execute a cooling strategy so that the operating temperature of the motor is within a normal operating temperature range includes:

[0098] When the first difference is less than the first preset value, the cooling system is controlled to increase or decrease the preset cooling water temperature by the first adjustment value.

[0099] Some embodiments of the present application control the cooling system to adjust the cooling water temperature accordingly according to the magnitude of the temperature change, so that the motor can operate within a normal temperature range.

[0100] Optionally, controlling the cooling system to execute a cooling strategy so that the operating temperature of the motor is within a normal operating temperature range includes:

[0101] When the first difference is greater than or equal to the first preset value, the cooling system is controlled to increase or decrease the preset cooling water temperature by a second adjustment value, wherein the second adjustment value is greater than the first adjustment value.

[0102] Some embodiments of the present application control the cooling system to adjust the cooling water temperature accordingly according to the magnitude of the temperature change when it is detected that the temperature value is greater than or equal to a preset value, so that the motor can operate within a normal temperature range.

[0103] Optionally, different positions in the motor operation link include at least one or more of a cooling oil channel, a motor, a reducer, an oil reservoir, an oil pump, an oil filter and a cooling water circuit.

[0104] Some embodiments of the present application can improve the accuracy of temperature regulation by acquiring temperature values ​​at different locations in the operating link.

[0105] Optionally, the method further comprises:

[0106] When the operating temperature of the motor is greater than the normal operating temperature range, the cooling system is controlled to adjust the preset cooling water temperature to a third preset value according to the operating state of the motor.

[0107] Some embodiments of the present application control the cooling system to adjust the preset cooling water temperature to a third preset value according to the operating state of the motor when the operating temperature of the motor is greater than the normal operating temperature range, so as to adjust the temperature of the cooling water in time so that the motor can operate normally as soon as possible.

[0108] Optionally, the working state of the motor includes at least one of low-speed operation, stable operation, high-speed operation and high-load operation.

[0109] Some embodiments of the present application comprehensively consider the operating status of the motor, judge the future temperature rise based on the current temperature and working conditions, and pre-set the cooling system, thereby greatly improving the motor efficiency and shortening the test time during the test.

[0110] like Figure 2 As shown, the cooling system includes an electric drive housing 1, a cooling oil channel 2, a motor 3, a reducer 4, an oil reservoir 5, an oil pump 6, an oil filter 7, a radiator 8, a cooling system 9, a cooling water channel 10 and a controller 11.

[0111] First, the temperature of the detected position is collected by the temperature sensors K1 and K2 arranged in the motor 3 and the reducer 4, and the oil temperature collected by K3 in the cooling oil channel 2 is uploaded to the controller 11. The cooling water temperature to be set for the current cooling system 9 is obtained through the pre-established temperature model library and combined with the current working conditions, thereby achieving the function of being able to control the temperature within a stable range.

[0112] For example: the optimal operating temperature range is 70℃-90℃, the current temperature is detected to be 85℃, and the cooling system set temperature is 80℃. If the current operating condition continues to operate, the temperature will exceed the upper limit of the temperature requirement. At this time, the processor will determine the cooling strategy corresponding to the target adjustment temperature value according to the target adjustment temperature value and the working status of the motor, that is, control the cooling system to change the set temperature of the cooling system to 60℃, and start cooling in advance before reaching the upper limit of the temperature to ensure that the temperature is maintained in the optimal temperature range; if the current temperature is detected to be 60℃ and the cooling system temperature is set to 70℃, the cooling system will be controlled to adjust the preset cooling water temperature to 85℃ in order to quickly reach the optimal temperature range.

[0113] Temperature sensor part: The temperature data in the electric drive system, i.e. the motor operation link, is detected by temperature sensors distributed in the electric drive system, including:

[0114] The first temperature sensor detects a first temperature value of the oil temperature in the motor;

[0115] The second temperature sensor detects a second temperature value of the oil temperature in the reducer;

[0116] The third temperature sensor detects a third temperature value of the cooling oil passing through the cooling oil passage.

[0117] The temperature rise test is used to obtain the temperature rise of the motor under different working conditions. The water temperature of the heat exchanger cooling system is preset according to the temperature rise test to ensure that the oil temperature of the motor is kept in the optimal range or even maintained at the optimal temperature.

[0118] The working process includes: if the current operating condition continues to operate at a temperature that exceeds the upper limit of the motor's normal temperature range, the controller will generate a cooling strategy based on the collected temperature value and the motor's working status, and control the cooling system to lower the preset cooling water temperature, starting to cool down in advance before the temperature upper limit is reached to ensure that the temperature remains in the optimal temperature range; if it is detected that the current temperature is lower than the optimal range, the cooling system temperature setting will be increased to quickly reach the optimal temperature range.

[0119] Functions of various components: The oil pump is used to pressurize the cooling oil in the oil reservoir to the radiator; the radiator is used to dissipate the heat of the cooling oil; the cooling oil channel is used to absorb the heat of the heat-generating components of the electric drive system by receiving the cooling oil delivered by the radiator, and deliver the cooling oil to the oil reservoir.

[0120] The linkage between the cooling system and the controller can judge the future temperature rise through the current temperature and working conditions and pre-set the cooling system, which greatly improves the motor efficiency and shortens the test time. The heat exchanger cooling water temperature control function of the present invention can adjust the cooling water temperature in real time, which can ensure that the motor is within the specified temperature range, saving time and reducing costs. The temperature control system of the present invention can timely control the temperature of the equipment in the test room and prevent the equipment temperature from being too high.

[0121] It should be noted that each implementable method in this embodiment may be implemented separately, or may be implemented in combination in any combination without conflict, and this application is not limited thereto.

[0122] Another embodiment of the present application provides a motor cooling device, which is used to execute the motor cooling method provided in the above embodiment.

[0123] like Figure 3 , which is a schematic diagram of the structure of a motor cooling device provided in an embodiment of the present application. The motor cooling device includes an acquisition module 301, a determination module 302 and a control module 303, wherein:

[0124] The acquisition module 301 is used to acquire target adjustment temperature values ​​at different positions in the motor operation link when the operating temperature of the motor is within the normal operating temperature range;

[0125] The determination module 302 is used to determine a cooling strategy corresponding to the target adjustment temperature value according to the target adjustment temperature value and the working state of the motor;

[0126] The control module 303 is used to control the cooling system to execute a cooling strategy so that the operating temperature of the motor is within a normal operating temperature range.

[0127] Regarding the device in this embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0128] Some embodiments of the present application acquire different temperature values ​​in the motor operation link in real time. In this way, the cooling strategy can be determined in advance based on the acquired temperature values ​​and the working status of the motor, and the cooling water temperature can be adjusted in real time according to the cooling. This can ensure that the motor is within the specified temperature range, saving time and reducing costs.

[0129] Another embodiment of the present application further supplements the motor cooling device provided in the above embodiment.

[0130] Optionally, the acquisition module 301 is used to:

[0131] Acquire a first temperature value and a second temperature value at different positions in the motor operation link;

[0132] A target adjustment temperature value is determined according to the first temperature value and the second temperature value.

[0133] Optionally, the acquisition module 301 is used to:

[0134] Determining a first difference value corresponding to the first temperature value according to a first temperature value of the motor and a first cooling threshold;

[0135] Determine a second difference value corresponding to the second temperature value according to the second temperature value of the reducer and the second cooling threshold;

[0136] The target adjustment temperature value is determined according to the first difference and the second difference.

[0137] Optionally, the determination module 302 is used to:

[0138] If the first difference is greater than the second difference, a first temperature value corresponding to the first difference is determined as the target adjustment temperature value.

[0139] Some embodiments of the present application obtain temperature values ​​at multiple different locations, and determine the temperature value that is closer to the critical value as the target adjustment temperature value, and then determine the corresponding cooling strategy based on the adjustment temperature value to improve cooling control.

[0140] Optionally, the determination module 302 is used to:

[0141] According to the size of the target adjustment temperature value and the working state of the motor, a cooling strategy corresponding to the target adjustment temperature value is determined, wherein the cooling strategy at least includes controlling the cooling system to increase, decrease or keep the preset cooling water temperature unchanged.

[0142] In some embodiments of the present application, a real-time temperature value is obtained, and then a corresponding strategy is determined according to the working state of the motor, so that the motor can operate within a normal temperature range.

[0143] Optionally, the control module 303 is used to:

[0144] When the first difference is less than the first preset value, the cooling system is controlled to increase or decrease the preset cooling water temperature by the first adjustment value.

[0145] Some embodiments of the present application control the cooling system to adjust the cooling water temperature accordingly according to the magnitude of the temperature change, so that the motor can operate within a normal temperature range.

[0146] Optionally, the control module 303 is used to:

[0147] When the first difference is greater than or equal to the first preset value, the cooling system is controlled to increase or decrease the preset cooling water temperature by a second adjustment value, wherein the second adjustment value is greater than the first adjustment value.

[0148] Some embodiments of the present application control the cooling system to adjust the cooling water temperature accordingly according to the magnitude of the temperature change when it is detected that the temperature value is greater than or equal to a preset value, so that the motor can operate within a normal temperature range.

[0149] Optionally, different positions in the motor operation link include at least one or more of a cooling oil channel, a motor, a reducer, an oil reservoir, an oil pump, an oil filter and a cooling water circuit.

[0150] Some embodiments of the present application can improve the accuracy of temperature regulation by acquiring temperature values ​​at different locations in the operating link.

[0151] Optionally, the control module 303 is used to:

[0152] When the operating temperature of the motor is greater than the normal operating temperature range, the cooling system is controlled to adjust the preset cooling water temperature to a third preset value according to the operating state of the motor.

[0153] Some embodiments of the present application control the cooling system to adjust the preset cooling water temperature to a third preset value according to the operating state of the motor when the operating temperature of the motor is greater than the normal operating temperature range, so as to adjust the temperature of the cooling water in time so that the motor can operate normally as soon as possible.

[0154] Optionally, the working state of the motor includes at least one of low-speed operation, stable operation, high-speed operation and high-load operation.

[0155] Some embodiments of the present application comprehensively consider the operating status of the motor, judge the future temperature rise based on the current temperature and working conditions, and pre-set the cooling system, thereby greatly improving the motor efficiency and shortening the test time during the test.

[0156] Regarding the device in this embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0157] It should be noted that each implementable method in this embodiment may be implemented separately, or may be implemented in combination in any combination without conflict, and this application is not limited thereto.

[0158] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0159] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0160] 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. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A motor cooling method, characterized in that: The method comprises: When the operating temperature of the motor is within the normal operating temperature range, obtaining target adjustment temperature values ​​at different positions in the motor operation link; Determining a cooling strategy corresponding to the target adjustment temperature value according to the target adjustment temperature value and the working state of the motor; The cooling system is controlled to execute the cooling strategy so that the operating temperature of the motor is within the normal operating temperature range.

2. The motor cooling method according to claim 1, characterized in that: The step of obtaining target adjustment temperature values ​​at different positions in the motor operation link includes: Acquire a first temperature value and a second temperature value at different positions in the motor operation link; A target adjustment temperature value is determined according to the first temperature value and the second temperature value.

3. The motor cooling method according to claim 2, characterized in that: The step of determining a target adjustment temperature value according to the first temperature value and the second temperature value includes: Determining a first difference value corresponding to the first temperature value according to a first temperature value of the motor and a first cooling threshold; Determine, according to a second temperature value of the reducer and a second cooling threshold, a second difference value corresponding to the second temperature value; The target adjustment temperature value is determined according to the first difference and the second difference.

4. The motor cooling method according to claim 3, characterized in that: The step of determining the target adjustment temperature value according to the first difference and the second difference includes: If the first difference is greater than the second difference, a first temperature value corresponding to the first difference is determined as the target adjustment temperature value.

5. The motor cooling method according to claim 1, characterized in that: The step of determining a cooling strategy corresponding to the target adjustment temperature value according to the target adjustment temperature value and the working state of the motor includes: A cooling strategy corresponding to the target adjustment temperature value is determined according to the size of the target adjustment temperature value and the working state of the motor, wherein the cooling strategy at least includes controlling the cooling system to increase, decrease or keep the preset cooling water temperature unchanged.

6. The motor cooling method according to claim 5, characterized in that: The controlling cooling system to execute the cooling strategy so that the operating temperature of the motor is within the normal operating temperature range includes: When the first difference is less than a first preset value, the cooling system is controlled to increase or decrease the preset cooling water temperature by a first adjustment value.

7. The motor cooling method according to claim 5, characterized in that: The controlling cooling system to execute the cooling strategy so that the operating temperature of the motor is within the normal operating temperature range includes: When the first difference is greater than or equal to a first preset value, the cooling system is controlled to increase or decrease the preset cooling water temperature by a second adjustment value, wherein the second adjustment value is greater than the first adjustment value.

8. The motor cooling method according to claim 1, characterized in that: The different positions in the motor operation link include at least one or more of a cooling oil channel, a motor, a reducer, an oil reservoir, an oil pump, an oil filter and a cooling water channel.

9. The motor cooling method according to claim 1, characterized in that: The method further comprises: When the operating temperature of the motor is greater than the normal operating temperature range, the cooling system is controlled to adjust the preset cooling water temperature to a third preset value according to the operating state of the motor.

10. The motor cooling method according to claim 1, characterized in that: The working state of the motor operation includes at least one of low-speed operation, stable operation, high-speed operation and high-load operation.

11. A motor cooling device, characterized in that: The device comprises: An acquisition module, used for acquiring target adjustment temperature values ​​at different positions in the motor operation link when the operating temperature of the motor is within the normal operating temperature range; A judgment module, used for determining a target adjustment temperature value according to the first temperature value and the second temperature value; A determination module, configured to determine a cooling strategy corresponding to the target adjustment temperature value according to the target adjustment temperature value and the working state of the motor; The control module is used to control the cooling system to execute the cooling strategy so that the operating temperature of the motor is within the normal operating temperature range.

12. The motor cooling device according to claim 11, characterized in that: The judging module is used for: Determining a first difference value corresponding to the first temperature value according to a first temperature value of the motor and a first cooling threshold; Determine, according to a second temperature value of the reducer and a second cooling threshold, a second difference value corresponding to the second temperature value; The target adjustment temperature value is determined according to the first difference and the second difference.

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