Thermal management calibration system

Abstract

The embodiment of the invention provides a thermal management calibration system, and the system comprises a transmission case which comprises at least two motors, and each motor is provided with a corresponding temperature collection module used for collecting the temperature of the motor; the controller is electrically connected with a motor in the transmission case and the temperature acquisition module, and the controller is configured to execute the following steps: determining a to-be-calibrated motor and an auxiliary motor in the transmission case; and controlling the to-be-calibrated motor and the auxiliary motor to operate a thermal management calibration process to obtain a thermal management calibration table corresponding to the to-be-calibrated motor. According to the technical scheme of the embodiment of the invention, the labor intensity of testers can be reduced, and the thermal management calibration efficiency of the motor is improved.

Description

Technical Field

[0001] The present application relates to the field of mechanical control technology, and in particular, to a thermal management calibration system. Background Art

[0002] With the continuous development of science and technology, the application of motors in industrial production and vehicles has become one of the ways people often use to improve energy efficiency. For example, motors are used in machine tools, fans, and water pumps in industrial production to improve energy efficiency, or they are used in vehicles to drive vehicles to improve energy efficiency.

[0003] In the related art, in order to increase the service life of the motor, the operating temperature of the motor under different operating parameters is usually obtained before the motor is put into use, that is, thermal management calibration is performed on the motor to determine the relationship between the operating parameters and the operating temperature of the motor through thermal management calibration, so as to avoid the motor running for a long time under operating parameters with too high operating temperature, which will reduce the service life of the motor.

[0004] In order to obtain the operating temperature corresponding to the motor under different operating parameters, testers are usually required to adjust the motor to different operating parameters and then obtain the corresponding operating temperatures of the motor one by one, which greatly increases the labor intensity of the testers and makes the thermal management calibration efficiency of the motor low. Summary of the invention

[0005] In order to solve the above technical problems, an embodiment of the present application provides a thermal management calibration system.

[0006] According to one aspect of an embodiment of the present application, a thermal management calibration system is provided, comprising: a transmission box, the transmission box comprising at least two motors, each motor being provided with a corresponding temperature acquisition module for collecting the motor temperature; a controller, electrically connected to the motor and the temperature acquisition module in the transmission box, the controller being configured to perform the following steps: determining the motor to be calibrated and the auxiliary motor in the transmission box; controlling the motor to be calibrated and the auxiliary motor to run a thermal management calibration process to obtain a thermal management calibration table corresponding to the motor to be calibrated; the thermal management calibration process comprising: controlling the operation of the motor to be calibrated according to operating parameters corresponding to a calibration condition; wherein the calibration condition is the condition indicated by the thermal management calibration process; controlling the operation of the auxiliary motor according to the auxiliary operating parameters corresponding to the operating parameters of the motor to be calibrated under the calibration condition; obtaining the operating temperature of the motor to be calibrated; and associating the operating temperature with the operating parameters corresponding to the calibration condition and storing them in the thermal management calibration table corresponding to the motor to be calibrated.

[0007] In one embodiment of the present application, based on the aforementioned scheme, after the controller executes the operation of associating the operating parameters corresponding to the operating temperature and the calibration condition and storing them in the thermal management calibration table corresponding to the motor to be calibrated, the controller is also configured to perform the following steps: adjust the operating parameters corresponding to the calibration condition according to the operating temperature and the preset limit temperature of the motor to be calibrated; and re-execute the thermal management calibration process based on the adjusted operating parameters of the calibration condition.

[0008] In one embodiment of the present application, based on the aforementioned scheme, the operating parameters corresponding to the calibration condition are adjusted according to the operating temperature and the preset limit temperature of the motor to be calibrated, including: if the operating temperature does not reach the preset limit temperature of the motor to be calibrated, then the operating torque corresponding to the calibration condition in the operating parameters is increased according to the preset torque step; if the operating temperature reaches the preset limit temperature, then the operating speed corresponding to the calibration condition in the operating parameters is increased according to the preset speed step, and the operating torque corresponding to the calibration condition in the operating parameters is adjusted to the preset initial torque of the motor to be calibrated.

[0009] In one embodiment of the present application, based on the above-mentioned scheme, the operating torque corresponding to the calibration condition in the operating parameters is increased according to the preset torque step, including: if the operating torque corresponding to the calibration condition in the operating parameters reaches the preset maximum torque of the motor to be calibrated, the operating torque corresponding to the calibration condition in the operating parameters is adjusted to the preset initial torque of the motor to be calibrated, and the operating speed corresponding to the calibration condition in the operating parameters is increased according to the preset speed step; if the operating torque corresponding to the calibration condition in the operating parameters does not reach the preset maximum torque of the motor to be calibrated, the operating torque corresponding to the calibration condition in the operating parameters is increased according to the preset torque step.

[0010] In one embodiment of the present application, based on the aforementioned scheme, the operating speed corresponding to the calibration condition in the operating parameters is increased according to the preset speed step, including: if the operating speed corresponding to the calibration condition in the operating parameters reaches the preset maximum speed of the motor to be calibrated, the motor to be calibrated and the auxiliary motor are controlled to stop; if the operating speed corresponding to the calibration condition in the operating parameters does not reach the preset maximum speed of the motor to be calibrated, the operating speed corresponding to the calibration condition in the operating parameters is increased according to the preset speed step.

[0011] In one embodiment of the present application, based on the aforementioned scheme, the motor to be calibrated and the auxiliary motor are controlled to shut down, including: generating a calibration identifier corresponding to the motor to be calibrated; redetermining the motor to be calibrated and the auxiliary motor in the transmission box according to the calibration identifier; re-executing the thermal management calibration process based on the preset initial speed and preset initial torque in the operating parameters of the calibration condition; and when each motor in the transmission box has a corresponding calibration identifier, controlling the motor to be calibrated and the auxiliary motor to shut down.

[0012] In one embodiment of the present application, based on the aforementioned scheme, the temperature acquisition module includes a stator temperature measuring unit for collecting the stator temperature in the motor and a rotor temperature measuring unit for collecting the rotor temperature in the motor; the controller is electrically connected to the stator temperature measuring unit and the rotor temperature measuring unit, respectively; the controller is also configured to perform the following steps: obtain the stator temperature and rotor temperature of the motor to be calibrated; calculate the operating temperature of the motor to be calibrated based on the stator temperature and the rotor temperature.

[0013] In one embodiment of the present application, based on the aforementioned scheme, the rotor temperature measuring unit includes a rotor temperature measuring piece, a rotor temperature measuring tool, a rotor end of the temperature measuring device and a stator end of the temperature measuring device; the rotor temperature measuring piece is arranged on the magnetic steel of the motor rotor; the rotor temperature measuring tool is fixed to one end of the motor shaft by a tool fastening bolt; the rotor end of the temperature measuring device is arranged on the rotor temperature measuring tool and is electrically connected to the rotor temperature measuring piece; the stator end of the temperature measuring device is arranged on the housing of the transmission box and is respectively connected to the rotor temperature measuring piece and the controller.

[0014] In one embodiment of the present application, based on the aforementioned scheme, a hollow hole is provided on the tooling fastening bolt, and the hollow hole is used to allow the signal line electrically connected to the rotor end of the temperature measuring device to pass into the cavity of the motor shaft; a wire threading hole is provided on the side wall of the shaft, and the wire threading hole is used to allow the signal line to pass out of the cavity of the shaft and be electrically connected to the rotor temperature measuring device.

[0015] In one embodiment of the present application, based on the above solution, the hollow hole is filled with sealant.

[0016] In the technical solution of the embodiment of the present application, the controller can first determine the motor to be calibrated and the auxiliary motor in the transmission box, and then control the motor to be calibrated and the auxiliary motor to run the thermal management calibration process, that is, control the operation of the motor to be calibrated according to the operating parameters corresponding to the calibration condition, and then control the operation of the auxiliary motor according to the auxiliary operating parameters corresponding to the operating parameters of the motor to be calibrated under the calibration condition, and then obtain the operating temperature of the motor to be calibrated to ensure that the obtained operating temperature of the motor to be calibrated is the operating temperature after the motor to be calibrated and the auxiliary motor in the transmission box are running at the same time, thereby improving the accuracy of the obtained operating temperature of the motor to be calibrated, and finally the operating temperature and the operating parameters corresponding to the calibration condition are associated and stored in the thermal management calibration table corresponding to the motor to be calibrated, so as to avoid the test personnel adjusting the operating parameters of each motor in the transmission box one by one during the thermal management calibration of the motor to be calibrated, thereby reducing the labor intensity of the test personnel and improving the thermal management calibration efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0018] Figure 1 is a structural schematic diagram of a thermal management calibration system provided by an exemplary embodiment of the present application;

[0019] Figure 2 is a schematic structural diagram of a transmission box in a thermal management calibration system provided by an exemplary embodiment of the present application;

[0020] Figure 3 is a control flow diagram of a controller in a thermal management calibration system provided by an exemplary embodiment of the present application;

[0021] Figure 4 is a flow chart of a thermal management calibration process provided by an exemplary embodiment of the present application;

[0022] Figure 5 It is a structural schematic diagram of a stator temperature measuring unit and a rotor temperature measuring unit in a temperature acquisition module provided by an exemplary embodiment of the present application;

[0023] Figure 6 This is a schematic diagram of a rotor temperature measurement tool provided by an exemplary embodiment of the present application.

[0024] Figure 7 yes Figure 4 A flowchart in an exemplary embodiment after step S4 in the illustrated embodiment;

[0025] Figure 8 yes Figure 7 The flowchart of step S5 in the illustrated embodiment in an exemplary embodiment;

[0026] Fig. 9 yes Figure 8 The flowchart of step S7 in the illustrated embodiment in an exemplary embodiment;

[0027] Fig.10 yes Figure 8 The illustrated embodiment is a flow chart of step S8 in an exemplary embodiment. DETAILED DESCRIPTION

[0028] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0029] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0030] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0031] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0032] It should be noted that the "multiple" mentioned in this article refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0033] In the related art, in order to increase the service life of the motor, the operating temperature of the motor under different operating parameters is usually obtained before the motor is put into use, that is, thermal management calibration is performed on the motor to determine the relationship between the operating parameters and the operating temperature of the motor through thermal management calibration, so as to avoid the motor running for a long time under operating parameters with too high operating temperature, which will reduce the service life of the motor.

[0034] In order to obtain the operating temperature of the motor under different operating parameters, testers usually adjust the motor to different operating parameters and then obtain the corresponding operating temperatures of the motor one by one, which greatly increases the labor intensity of the testers and reduces the thermal management calibration efficiency of the motor.

[0035] To solve the above problems, the present application provides a thermal management calibration system. Figure 1 It is a structural schematic diagram of a thermal management calibration system provided by an exemplary embodiment of the present application.

[0036] like Figure 1 As shown, the thermal management calibration system 100 may include a transmission box 101. The transmission box 101 may be used to fix the motor 102 and provide a closed environment for the motor 102 to ensure that the motor 102 in the transmission box 101 is not easily displaced during operation and to prevent pollution from the external environment from entering the motor.

[0037] In some embodiments of the present application, the transmission box 101 may include at least two motors. Figure 2 As shown, in the case where the transmission box 101 includes two motors, the two motors can be fixedly arranged in the transmission box 101 so that the two motors can output power in coordination to achieve the purpose of improving energy efficiency.

[0038] In some embodiments of the present application, the transmission box 101 may include a temperature acquisition module 103 for acquiring the temperature of the motor 102. Figure 1 and Figure 2 As shown, the temperature acquisition module 103 can be respectively arranged on each motor, that is, each motor is provided with a corresponding temperature acquisition module 103 to determine the temperature condition of each motor 102 during operation.

[0039] The thermal management calibration system may include a controller 104, referring to Figure 1 and Figure 2 The controller 104 can be arranged on the transmission box 101, and the controller 104 can be electrically connected to the motor 102 and the temperature acquisition module 103 in the transmission box 101, so as to control the operating parameters of the motor 102 and obtain the operating temperature corresponding to the motor 102 under different operating parameters, and complete the thermal management calibration of the motor 102 in the transmission box 101.

[0040] Exemplarily, in order to execute a preset control program on the controller, a storage module for storing the control program will be set inside the controller, and the storage module may include a built-in memory and an external memory, the built-in memory is arranged inside the controller, and the external memory is electrically connected to the controller. Among them, the external memory and the built-in memory are used for writing and reading the control program, and storing the execution parameters. For example, the built-in memory is generally directly connected to the MCU (Micro Control Unit) corresponding to the controller, and its storage capacity is generally small, but due to the direct connection with the MCU, its speed is relatively fast. In this application, the built-in memory is used to store the instructions and data of the current running program, and directly exchange information with the MCU. Among them, the built-in memory is composed of many storage units, each unit can store a binary number or an instruction represented by a binary code. The internal memory is composed of a random access memory and a read-only memory. The external memory refers to a memory other than the memory configured by the controller and the MCU cache. Such a memory can still save data after power failure, such as a hard disk, a floppy disk, an optical disk, a U disk, etc.

[0041] It should be understood that Figure 1 and Figure 2 This is only an exemplary schematic diagram of the structure of the thermal management calibration system, and does not limit the structure of the thermal management calibration system. In actual application scenarios, the thermal management calibration system may include Figure 1 and Figure 2 The different components of the structure shown include Figure 1 and Figure 2 The structures shown may have more or fewer components, which is not intended to be limiting.

[0042] Reference Figure 3 As shown, in some embodiments of the present application, the controller may also be configured to perform the following steps:

[0043] Step S110, determining the motor to be calibrated and the auxiliary motor in the transmission box.

[0044] In the implementation of the present application, in order to perform thermal management calibration on the motor in the transmission box, the motor to be calibrated and the auxiliary motor in the transmission box can be first determined. The motor to be calibrated is the motor in the transmission box that needs to perform thermal management calibration, and the auxiliary motor is the other motor in the transmission box except the motor to be calibrated.

[0045] The method for determining the motor to be calibrated and the auxiliary motor in the transmission box can be flexibly set according to needs. In an example, the serial numbers corresponding to the different motors in the transmission box can be obtained first, and then the motor with the earliest serial number can be used as the motor to be calibrated, and the motors corresponding to the remaining serial numbers can be used as auxiliary motors.

[0046] In another example, the power corresponding to each motor in the transmission box can be obtained first, and then the motor with the largest power is used as the motor to be calibrated, and the remaining motors are used as auxiliary motors.

[0047] In another example, a calibration signal for indicating the start of thermal management calibration may be obtained first, and then the motor corresponding to the motor information carried in the calibration signal may be determined from the transmission box as the motor to be calibrated, and the remaining motors may be used as auxiliary motors.

[0048] Step S120, controlling the motor to be calibrated and the auxiliary motor to run a thermal management calibration process.

[0049] In an implementation manner of the present application, after determining the motor to be calibrated and the auxiliary motor in the transmission box, the motor to be calibrated and the auxiliary motor can be controlled to run a thermal management calibration process to obtain a thermal management calibration table corresponding to the motor to be calibrated, thereby improving the efficiency of thermal management calibration.

[0050] Specifically, in some embodiments of the present application, the flowchart of the thermal management calibration process can refer to Figure 4 As shown, the thermal management calibration process may include steps S1 to S4, which are described in detail as follows:

[0051] In step S1, the operation of the motor to be calibrated is controlled according to the operating parameters corresponding to the calibration condition.

[0052] In an embodiment of the present application, when controlling the motor to be calibrated and the auxiliary motor to run the thermal management calibration process, the operation of the motor to be calibrated can be first controlled according to the operating parameters corresponding to the calibration conditions, wherein the calibration conditions are the conditions indicated by the thermal management calibration process.

[0053] In step S2, the operation of the auxiliary motor is controlled according to the auxiliary operating parameters corresponding to the operating parameters of the motor to be calibrated in the calibration condition.

[0054] In an embodiment of the present application, after the motor to be calibrated operates according to the operating parameters corresponding to the calibration conditions, considering that the auxiliary motor is used to increase the power output by the transmission box under the calibration conditions or to improve the stability of the power output by the motor to be calibrated under the calibration conditions, the operation of the auxiliary motor can be controlled according to the auxiliary operating parameters corresponding to the operating parameters of the motor to be calibrated under the calibration conditions.

[0055] Among them, the auxiliary operating parameters represent the operating parameters required for the auxiliary motor to improve the power output of the transmission box under the calibration conditions or to improve the stability of the power output of the motor to be calibrated under the calibration conditions. That is to say, the auxiliary operating parameters of the auxiliary motor are associated with the operating parameters of the motor to be calibrated. Correspondingly, the auxiliary operating parameters can change with the change of the current operating parameters of the motor to be calibrated, so as to ensure that the auxiliary motor can improve the stability of the power output of the motor to be calibrated under different operating parameters or improve the power output of the transmission box under different working conditions under the auxiliary operating parameters.

[0056] The method of determining the auxiliary operating parameters corresponding to the operating parameters of the motor to be calibrated under the calibration condition can be flexibly set as needed. In one example, the associated auxiliary operating parameters can be directly determined from a preset memory according to the operating parameters of the calibration condition, and the determined auxiliary operating parameters are used as the auxiliary operating parameters required for the auxiliary motor to operate. In other words, different operating parameters of the calibration condition and different auxiliary operating parameters can be stored in advance in the preset memory in association with each other.

[0057] In another example, the target power output by the motor to be calibrated can be determined based on the operating parameters of the calibration condition, and then the auxiliary power to be output by the auxiliary motor can be determined based on the target power. Then, the auxiliary operating parameters required for the auxiliary motor to run can be calculated based on the auxiliary power and the parameter information of the auxiliary motor, thereby improving the accuracy of the auxiliary operating parameters to ensure that the auxiliary motor can improve the stability of the power output by the motor to be calibrated under the calibration condition and improve the power output by the transmission box under the calibration condition under the auxiliary operating parameters.

[0058] In step S3, the operating temperature of the motor to be calibrated is obtained.

[0059] Considering that the auxiliary motor and the motor to be calibrated are both in the transmission box, that is, the auxiliary motor and the motor to be calibrated are in the same closed space, that is to say, the operating temperatures generated by the auxiliary motor and the motor to be calibrated will affect each other. Based on this, under the same operating parameters, when the motor to be calibrated and the auxiliary motor are controlled to run at the same time, the temperature of both is higher than when the motor to be calibrated or the auxiliary motor is controlled to run alone. Therefore, in the embodiment of the present application, after the auxiliary motor is controlled to run according to the auxiliary operating parameters, the operating temperature of the motor to be calibrated is obtained to improve the accuracy of the obtained operating temperature of the motor to be calibrated.

[0060] Among them, the method of obtaining the operating temperature of the motor to be calibrated can be flexibly set according to needs. In one example, the temperature acquisition module corresponding to the motor to be calibrated can be directly controlled based on the electrical connection between the temperature acquisition module to collect the temperature value of the motor to be calibrated, and the temperature value collected by the temperature acquisition module is used as the operating temperature of the motor to be calibrated.

[0061] In another example, the temperature acquisition module can be controlled multiple times to collect temperature values ​​of the motor to be calibrated, and then an average temperature value can be calculated based on the multiple collected temperature values ​​of the motor to be calibrated, and the calculated average temperature value can be used as the operating temperature of the motor to be calibrated, thereby avoiding the operating temperature of the motor to be calibrated from affecting the thermal management calibration process of the motor to be calibrated when it fluctuates abnormally for a short time.

[0062] In another example, the temperature acquisition module may include a stator temperature measuring unit for collecting the stator temperature in the motor and a rotor temperature measuring unit for collecting the rotor temperature in the motor, and the controller may be electrically connected to the stator temperature measuring unit and the rotor temperature measuring unit, respectively. In order to obtain the operating temperature of the motor to be calibrated, the controller may first obtain the stator temperature and the rotor temperature of the motor to be calibrated, and then calculate the operating temperature of the motor to be calibrated based on the stator temperature and the rotor temperature, so as to further improve the accuracy of the obtained operating temperature of the motor to be calibrated.

[0063] The method of obtaining the stator temperature and rotor temperature of the motor to be calibrated, in some embodiments of the present application, can directly control the stator temperature measuring unit of the motor to be calibrated in the corresponding temperature acquisition module to collect the stator temperature value of the motor to be calibrated through the electrical connection between the stator temperature measuring unit, and use the collected stator temperature value as the stator temperature of the motor to be calibrated; and control the rotor temperature measuring unit of the motor to be calibrated in the corresponding temperature acquisition module through the electrical connection between the rotor temperature measuring unit, so that the rotor temperature value of the motor to be calibrated can be collected, and the collected rotor temperature value is used as the rotor temperature of the motor to be calibrated.

[0064] In some embodiments of the present application, the stator temperature measuring unit and the rotor temperature measuring unit can be controlled multiple times to collect the stator temperature value and the rotor temperature value of the motor to be calibrated, and then the stator average temperature value and the rotor average temperature value are calculated based on the stator temperature value and the rotor temperature value of the motor to be calibrated collected multiple times, and the stator average temperature value is used as the stator temperature of the motor to be calibrated, and the rotor average temperature value is used as the rotor temperature of the motor to be calibrated, so as to improve the accuracy of the obtained stator temperature and rotor temperature.

[0065] It should be noted that, taking into account the difference between the frequency of change of the stator temperature and the frequency of change of the rotor temperature in the motor, based on this, in some embodiments of the present application, the number of times the stator temperature measuring unit is controlled to collect the stator temperature value of the motor to be calibrated may be different from the number of times the rotor temperature measuring unit is controlled to collect the rotor temperature value of the motor to be calibrated, so as to shorten the time for obtaining the operating temperature of the motor to be calibrated while ensuring the accuracy of the stator temperature and rotor temperature of the motor to be calibrated.

[0066] In addition, in some embodiments of the present application, the stator temperature measuring unit and the rotor temperature measuring unit in the temperature acquisition module can be set as shown in Figure 5 Specifically, the stator temperature measuring unit may include a stator temperature measuring component 105. The stator temperature measuring component 105 may be a thermistor, a thermocouple, a semiconductor temperature sensor, etc., which is not limited here.

[0067] like Figure 5 As shown, the stator temperature measuring element 105 can be set on the winding of the motor stator and electrically connected to the controller to directly collect the temperature value of the winding as a heat-generating component on the motor stator, thereby improving the accuracy of the stator temperature obtained by the controller.

[0068] Specifically, in order to establish an electrical connection between the stator temperature measuring element 105 and the controller, continue to refer to Figure 5 As shown, in the example of the present application, a threading hole can be provided on the housing of the transmission box 101, so that the signal line of the stator temperature measuring element 105 can be led out from the winding of the motor stator and pass through the threading hole to pass through the transmission box 101 and be electrically connected to the controller. The threading hole provided on the housing of the transmission box 101 can be further filled with sealant to prevent pollution from the external environment from entering the transmission box 101 and interfering with the operation of the motor.

[0069] In some embodiments of the present application, the configuration of the rotor temperature measuring unit can continue to refer to Figure 5 As shown, the rotor temperature measurement unit may include a rotor temperature measuring component 106 , a rotor temperature measuring tool 107 , a temperature measuring device rotor end 108 and a temperature measuring device stator end 109 .

[0070] Reference Figure 5 As shown, the rotor temperature measuring element 106 can be arranged on the magnetic steel of the motor rotor to directly collect the temperature value of the magnetic steel as the heating component on the motor rotor. The rotor temperature measuring element 106 is similar to the stator temperature measuring element 105, that is, the rotor temperature measuring element 106 can also be a thermistor, a thermocouple, a semiconductor temperature sensor, etc.

[0071] It should also be noted that the rotor temperature measuring element 106 and the stator temperature measuring element 105 can be arranged in multiple positions, and the specific arrangement position can be set by the tester based on experience, or set in the high-temperature area in the stator and the rotor obtained based on the simulation model test. Correspondingly, in the case where there are multiple rotor temperature measuring elements or multiple stator temperature measuring elements on a single motor, in order to obtain the operating temperature of the motor, the controller can obtain the temperature values ​​output by each of the multiple rotor temperature measuring elements and the multiple stator temperature measuring elements respectively, and then calculate the average rotor temperature acquisition value between the temperature values ​​output by each of the multiple rotor temperature measuring elements, and the average stator temperature acquisition value between the temperature values ​​output by each of the multiple stator temperature measuring elements, and finally calculate the operating temperature of the motor to be calibrated based on the average rotor temperature acquisition value and the average stator temperature acquisition value, so as to further improve the accuracy of the obtained operating temperature of the motor to be calibrated.

[0072] Reference Figure 5 As shown, the rotor temperature measuring fixture 107 can be fixed to one end of the motor shaft by a fixture fastening bolt 110 . Figure 6 1 is a schematic diagram of the structure of a rotor temperature measuring tool 107 provided by an exemplary embodiment of the present application. Figure 6 As shown, the rotor temperature measuring tool 107 is provided with a first mounting hole 111 and a plurality of second mounting holes 112, the first mounting hole 111 is used to pass the screw of the tool fastening bolt 110, and the second mounting hole 112 is used to pass the screw of the device fastening bolt 113 for fixing the rotor end 108 of the temperature measuring device; and the rotor temperature measuring tool 107 is provided with a groove on one side close to the rotor end 108 of the temperature measuring device, the depth of the groove is higher than the height of the nut of the tool fastening bolt 110, so that the tool fastening The screw rod of the fixing bolt 110 passes through the first mounting hole 111 of the rotor temperature measuring tool 107 and is fixedly connected to one end of the motor shaft. After the rotor temperature measuring tool 107 is fixed to the motor shaft, when the rotor end 108 of the temperature measuring device is set on the rotor temperature measurement workpiece, the groove on the rotor temperature measuring tool 107 ensures that the rotor end 108 of the temperature measuring device and the nut of the tool fastening bolt 110 are not likely to abut against each other, thereby avoiding damage to the rotor end 108 of the temperature measuring device by the tool fastening bolt 110.

[0073] Reference Figure 5As shown, the rotor end 108 of the temperature measuring device can be fixed on the temperature measuring fixture by the device fastening bolt 113, and is electrically connected to the rotor temperature measuring part 106. In order to electrically connect the rotor end 108 of the temperature measuring device to the rotor temperature measuring part 106, a hollow hole can be provided on the fixture fastening bolt 110, so that the signal line electrically connected to the rotor end 108 of the temperature measuring device can pass through the hollow hole into the cavity of the motor shaft. At the same time, a threading hole is provided on the side wall of the shaft, so that the signal line can pass through the threading hole out of the cavity of the shaft and be electrically connected to the rotor temperature measuring part 106, so that the rotor end 108 of the temperature measuring device and the rotor temperature measuring part 106 can achieve the purpose of electrical connection based on the signal line.

[0074] The hollow hole of the tool fastening bolt 110 can also be filled with sealant to fix the signal line through the sealant, thereby reducing the probability of the signal line falling off the temperature measuring device rotor or the rotor temperature measuring member 106 as the shaft rotates. In addition, when the temperature measuring device rotor end 108 is installed on the temperature measuring device tool, external contaminants can be prevented from entering the motor through the hollow hole of the tool fastening bolt 110, thereby reducing the probability of abnormality of the motor due to external contaminants.

[0075] It should be noted that, considering that the higher the operating power of the motor or the longer the operating time, the higher the operating temperature of the motor, in order to extend the operating time of the motor and improve the ability of the motor to maintain a high operating power under the premise that the service life of the motor is not easy to decrease. In the embodiment of the present application, the transmission box 101 may include a cooling oil circulation module. The cooling oil circulation module can inject cooling oil with a lower temperature through the oil filling port set on the motor, and recover the cooling oil in the motor through the oil return port set on the motor, so that the operating temperature generated by the motor during operation is absorbed by the cooling oil, so that the operating temperature of the motor is reduced, so as to extend the operating time of the motor and maintain a high operating power for a long time. Correspondingly, the sealant filled in the hollow hole of the tooling fastening bolt 110 and the threading hole on the shell of the transmission box 101 can also achieve the purpose of preventing the oil injected into the motor by the cooling oil circulation module from leaking out.

[0076] Reference Figure 5 As shown, the stator end 109 of the temperature measuring device can be arranged on the housing of the transmission case 101 and connected to the rotor temperature measuring element 106 and the controller respectively. Figure 5As shown, the stator end 109 of the temperature measuring device can be fixed on the housing of the transmission case 101 by the device mounting bolts 114, the stator end 109 of the temperature measuring device is wirelessly connected to the rotor end 108 of the temperature measuring device, and the stator end 109 of the temperature measuring device is electrically connected to the controller. When the rotor end 108 of the temperature measuring device obtains the electrical signal for representing the temperature value output by the rotor temperature measuring component 106 based on the electrical connection with the rotor temperature measuring component 106, and sends the electrical signal to the stator end 109 of the temperature measuring device based on the wireless connection with the stator end 109 of the temperature measuring device, the controller can obtain the electrical signal reflecting the temperature value of the heat-generating component on the motor rotor through the electrical connection with the stator end 109 of the temperature measuring device, thereby improving the accuracy of the rotor temperature obtained by the controller.

[0077] In order to establish a wireless connection between the stator end 109 of the temperature measuring device and the rotor end 108 of the temperature measuring device, in some embodiments of the present application, a transmitting module may be integrated in the rotor end 108 of the temperature measuring device, and a receiving module for receiving the signal transmitted by the transmitting module may be integrated in the stator end 109 of the temperature measuring device, so as to establish a wireless connection between the stator end 109 of the temperature measuring device and the rotor end 108 of the temperature measuring device through the transmitting module and the receiving module.

[0078] In addition, in some embodiments of the present application, an electrical connection may be used between the stator end 109 of the temperature measuring device and the rotor end 108 of the temperature measuring device. For example, the stator end 109 of the temperature measuring device and the rotor end 108 of the temperature measuring device may use a slip ring temperature measuring device to establish an electrical connection between the stator end 109 of the temperature measuring device and the rotor end 108 of the temperature measuring device through an electrical slip ring between the stator end 109 of the temperature measuring device and the rotor end 108 of the temperature measuring device. The specific connection method used between the stator end 109 of the temperature measuring device and the rotor end 108 of the temperature measuring device can be flexibly adjusted as needed, and is not limited here.

[0079] In step S4, the operating temperature and the operating parameters corresponding to the calibration conditions are associated and stored in a thermal management calibration table corresponding to the motor to be calibrated.

[0080] In an embodiment of the present application, after the operating temperature of the motor to be calibrated is obtained, the operating temperature and the operating parameters corresponding to the calibration conditions can be associated and stored in a thermal management calibration table corresponding to the motor to be calibrated, so that the tester can directly refer to the thermal management calibration table to determine the operating temperature of the motor to be calibrated under the operating parameters corresponding to the calibration conditions, thereby achieving the purpose of thermal management calibration of the motor to be calibrated.

[0081] For example, when the operating parameter corresponding to the calibration condition is parameter A, and the operating temperature of the motor to be calibrated is obtained to be 80° C., parameter A and 80° C. can be associated and stored in the thermal management calibration table.

[0082] Through the above implementation mode, the controller can first determine the motor to be calibrated and the auxiliary motor in the transmission box, and then control the motor to be calibrated and the auxiliary motor to run the thermal management calibration process, that is, control the operation of the motor to be calibrated according to the operating parameters corresponding to the calibration conditions, and then control the operation of the auxiliary motor according to the auxiliary operating parameters corresponding to the operating parameters of the motor to be calibrated in the calibration conditions, and then obtain the operating temperature of the motor to be calibrated to ensure that the obtained operating temperature of the motor to be calibrated is the operating temperature after the motor to be calibrated and the auxiliary motor in the transmission box are running at the same time, thereby improving the accuracy of the obtained operating temperature of the motor to be calibrated, and finally the operating temperature and the operating parameters corresponding to the calibration conditions are associated and stored in the thermal management calibration table corresponding to the motor to be calibrated, so as to avoid the test personnel adjusting the operating parameters of each motor in the transmission box one by one during the thermal management calibration of the motor to be calibrated, thereby reducing the labor intensity of the test personnel and improving the thermal management calibration efficiency of the motor.

[0083] See also Figure 7 , Figure 7 FIG. 1 is a thermal management calibration process according to another exemplary embodiment. Figure 7 As shown, in Figure 4 After step S4 in the illustrated embodiment, the thermal management calibration process may further include steps S5 to S6, which are described in detail as follows:

[0084] In step S5, the operating parameters corresponding to the calibration condition are adjusted according to the operating temperature and the preset limit temperature of the motor to be calibrated.

[0085] In an embodiment of the present application, after the operating parameters corresponding to the operating temperature and the calibration conditions are associated and stored in the thermal management calibration table corresponding to the motor to be calibrated, the operating parameters corresponding to the calibration conditions can be adjusted according to the operating temperature and the preset limit temperature of the motor to be calibrated, so as to determine the operating temperature of the motor to be calibrated under other operating parameters while ensuring that the operating temperature does not exceed the preset limit temperature, thereby expanding the thermal management calibration range of the motor to be calibrated.

[0086] The preset limit temperature represents an operating temperature that is likely to cause a reduction in the service life of the motor to be calibrated under the hardware parameters of the motor to be calibrated.

[0087] The method of adjusting the calibration working condition according to the operating temperature and the preset limit temperature of the motor to be calibrated can be flexibly set as needed. In one example, it can be determined whether the operating temperature reaches the preset limit temperature. If it is judged as no, the operating speed and operating torque in the operating parameters corresponding to the calibration working condition are increased to facilitate the subsequent expansion of the thermal management calibration range of the motor to be calibrated. At the same time, the critical working condition corresponding to the motor to be calibrated can be determined, that is, it is determined under which operating parameters the operating temperature of the motor to be calibrated will exceed the preset limit temperature. On the contrary, if it is judged as yes, the operating speed and operating torque in the operating parameters corresponding to the calibration working condition can be reduced to improve the thermal management calibration of the motor to be calibrated and further determine the critical working condition of the motor to be calibrated.

[0088] In another example, it is also possible to first determine whether the operating temperature has reached the preset limit temperature. If the determination is no, the operating speed and the operating torque in the operating parameters corresponding to the calibration condition are selected to be increased to further expand the thermal management calibration range of the motor to be calibrated and improve the accuracy of the critical operating conditions of the motor to be calibrated subsequently determined. On the contrary, if the determination is yes, the operating speed and the operating torque in the operating parameters corresponding to the calibration condition can be selected to be reduced, and the accuracy of the critical operating conditions of the motor to be calibrated can be improved while further expanding the thermal management calibration range of the motor to be calibrated.

[0089] In step S6, the thermal management calibration process is re-executed based on the operating parameters adjusted under the calibration condition.

[0090] In an embodiment of the present application, after the operating parameters corresponding to the calibration condition are adjusted, the thermal management calibration process can be re-executed based on the adjusted operating parameters of the calibration condition, that is, the operation of the motor to be calibrated is controlled according to the adjusted operating parameters of the calibration condition, and the operation of the auxiliary motor is controlled according to the auxiliary operating parameters corresponding to the operating parameters of the motor to be calibrated under the adjusted operating parameters of the calibration condition, and then the operating temperature of the motor to be calibrated is obtained, and the operating temperature and the operating parameters corresponding to the calibration condition are associated and stored in the thermal management calibration table corresponding to the motor to be calibrated, thereby achieving the purpose of expanding the thermal management calibration range of the motor to be calibrated.

[0091] At the same time, whenever the operating parameters corresponding to the operating temperature and the calibration conditions are associated and stored in the thermal management calibration table corresponding to the motor to be calibrated, the operating parameters corresponding to the calibration conditions can be adjusted again according to the operating temperature and the preset limit temperature of the motor to be calibrated, and the thermal management calibration process can be re-executed based on the adjusted operating parameters of the calibration conditions, thereby further expanding the thermal management calibration range of the motor to be calibrated, and then determining the operating temperature of the motor to be calibrated under different operating parameters.

[0092] See also Figure 8 , Figure 8 is Figure 7The flowchart of step S5 in the embodiment shown is in an exemplary embodiment. Figure 8 As shown, the process of adjusting the operating parameters corresponding to the calibration condition according to the operating temperature and the preset limit temperature of the motor to be calibrated may include steps S7 to S8, which are described in detail as follows:

[0093] In step S7, if the operating temperature does not reach the preset limit temperature of the motor to be calibrated, the operating torque corresponding to the calibration condition in the operating parameters is increased according to the preset torque step.

[0094] Taking into account that the operating temperature generated when the motor operates at different operating torques at the same operating speed is different, based on this, in order to expand the thermal management calibration range of the motor, in an embodiment of the present application, during the process of adjusting the operating parameters corresponding to the calibration condition according to the operating temperature and the preset limit temperature of the motor to be calibrated, it can be determined whether the operating temperature reaches the preset limit temperature corresponding to the motor to be calibrated, so as to determine whether the motor to be calibrated can continue to improve the operating torque at the current operating speed.

[0095] Specifically, if it is determined that the operating temperature has not reached the preset limit temperature of the motor to be calibrated, it indicates that the motor to be calibrated is in a normal working state at the current operating speed and operating torque corresponding to the calibration condition, and can still continue to increase the operating torque at the current operating speed. The operating torque corresponding to the calibration condition in the operating parameters can be increased according to the preset torque step size, so as to further determine the operating temperature of the motor to be calibrated at the current operating speed under different operating torques, and store the operating temperature and the corresponding operating speed and operating torque in association with the thermal management calibration table corresponding to the motor to be calibrated, thereby achieving the purpose of expanding the thermal management calibration range of the motor to be calibrated.

[0096] The preset torque step size can be flexibly adjusted according to the tester or actual situation, and is not limited here.

[0097] For example, the preset limit temperature is 105°C, the preset torque step is 5N·m, and the operating speed corresponding to the calibration condition of the motor to be calibrated is 5500rpm and the operating torque is 200N·m. If the current operating temperature of the motor to be calibrated is 95°C, it can be determined that the operating temperature of the motor to be calibrated has not reached the preset limit temperature of the motor to be calibrated, and the operating torque corresponding to the motor to be calibrated at the current operating speed can be further increased, so as to obtain the operating temperature corresponding to the motor to be calibrated at an operating speed of 5500rpm and an operating torque of 205N·m, and the obtained operating temperature and the operating parameters corresponding to the operating speed of 5500rpm and the operating torque of 205N·m are associated and stored in the thermal management calibration table of the motor to be calibrated, thereby expanding the thermal management calibration range of the motor to be calibrated that can be represented by the thermal management calibration table.

[0098] In step S8, if the operating temperature reaches the preset limit temperature, the operating speed corresponding to the calibration condition in the operating parameters is increased according to the preset speed step, and the operating torque corresponding to the calibration condition in the operating parameters is adjusted to the preset initial torque of the motor to be calibrated.

[0099] In the implementation of the present application, in the process of judging whether the operating temperature has reached the preset limit temperature corresponding to the motor to be calibrated, if it is determined that the operating temperature has reached the preset limit temperature, it indicates that the motor to be calibrated is already in a critical condition that is prone to damage, and it is impossible to expand the thermal management calibration range of the motor to be calibrated by further increasing the operating torque of the motor to be calibrated at the current operating speed. Based on this, the operating speed corresponding to the calibration condition in the operating parameters can be increased according to the preset speed step, so as to expand the thermal management calibration range of the motor to be calibrated by increasing the operating speed of the motor to be calibrated. At the same time, the operating torque corresponding to the calibration condition in the operating parameters is adjusted to the preset initial torque, so as to avoid the operating torque of the calibration condition in the operating parameters increased according to the preset torque step in the previous operating speed of the motor to be calibrated, which affects the operating temperature of the motor to be calibrated after the operating speed is increased, resulting in a reduction in the thermal management calibration range of the motor to be calibrated.

[0100] The preset initial torque may be the operating torque corresponding to the motor to be calibrated under standard operating conditions, or may be the minimum operating torque pre-set by the tester according to the hardware parameters of the motor to be calibrated.

[0101] Referring to the above example, after the operating torque of the motor to be calibrated is adjusted to 205N·m according to the preset torque step, if the obtained operating temperature of the motor to be calibrated reaches 120°C, it means that the operating temperature corresponding to the operating speed of the motor to be calibrated at 5500rpm and the operating torque of 205N·m exceeds the preset limit temperature, which means that the motor to be calibrated is already in a critical high temperature condition. If the operating torque of the motor to be calibrated is increased again, the correlation between the obtained operating temperature of the motor to be calibrated and the actual application environment is low.

[0102] Therefore, in order to further expand the thermal management calibration range of the motor to be calibrated under the premise of ensuring that the obtained operating temperature of the motor to be calibrated has a high correlation with the actual application environment, the operating speed corresponding to the calibration condition in the operating parameters can be increased according to the preset speed step. If the preset speed step is 300rpm, the operating speed corresponding to the calibration condition in the operating parameters can be increased to 5800rpm; then the operating torque corresponding to the calibration condition in the operating parameters is adjusted to the preset initial torque of the motor to be calibrated. If the preset initial torque is 150N·m, the operating torque corresponding to the calibration condition in the operating parameters can be adjusted to 150N·m. Thus, the operating temperature corresponding to the motor to be calibrated when the operating speed is 5800rpm and the operating torque is 150N·m is further obtained, and the obtained operating temperature and the operating parameters corresponding to the operating speed of 5800rpm and the operating torque of 150N·m are associated and stored in the thermal management calibration table of the motor to be calibrated, thereby expanding the thermal management calibration range of the motor to be calibrated that can be represented by the thermal management calibration table.

[0103] See also Fig. 9 , Fig. 9 is Figure 8 The flowchart of step S7 in the embodiment shown is in an exemplary embodiment. Fig. 9 As shown, the process of increasing the operating torque corresponding to the calibration condition in the operating parameters according to the preset torque step may include steps S9 to S10, which are described in detail as follows:

[0104] In step S9, if the operating torque corresponding to the calibration condition in the operating parameters reaches the preset maximum torque of the motor to be calibrated, the operating torque corresponding to the calibration condition in the operating parameters is adjusted to the preset initial torque of the motor to be calibrated, and the operating speed corresponding to the calibration condition in the operating parameters is increased according to the preset speed step.

[0105] In an embodiment of the present application, taking into account that the motor has a corresponding actual operating torque range, in the process of increasing the operating torque corresponding to the calibration condition in the operating parameters according to the preset torque step, it is possible to first determine whether the operating torque corresponding to the calibration condition in the operating parameters reaches the preset maximum torque of the motor to be calibrated, so as to determine whether the operating torque of the motor to be calibrated can be further increased within the actual operating torque range corresponding to the motor to be calibrated, thereby avoiding the operating torque corresponding to the calibration condition in the operating parameters exceeding the actual operating torque range, causing abnormal situations when the motor to be calibrated operates the calibration condition.

[0106] Specifically, if the operating torque corresponding to the calibration condition in the operating parameters reaches the preset maximum torque of the motor to be calibrated, it means that the operating torque corresponding to the calibration condition in the operating parameters is close to the boundary torque of the actual operating torque range corresponding to the motor to be calibrated. The operating torque corresponding to the calibration condition in the operating parameters can be adjusted to the preset initial torque of the motor to be calibrated to avoid the operating torque of the calibration condition exceeding the boundary torque of the actual operating torque range, which causes the motor to be calibrated to be unable to operate the calibration condition. Then, the operating speed corresponding to the calibration condition in the operating parameters is increased according to the preset speed step, so as to facilitate the subsequent acquisition of the operating temperature of the motor to be calibrated at different operating torques after the operating speed is increased, thereby expanding the thermal management calibration range of the motor to be calibrated.

[0107] The preset maximum torque may be a boundary torque of the actual operating torque range corresponding to the motor to be calibrated, or a torque in the actual operating torque range that is close to the boundary torque of the actual operating torque range, without limitation.

[0108] In step S10, if the operating torque corresponding to the calibration condition in the operating parameters does not reach the preset maximum torque of the motor to be calibrated, the operating torque corresponding to the calibration condition in the operating parameters is increased according to the preset torque step.

[0109] In an embodiment of the present application, in the process of judging whether the operating torque corresponding to the calibration condition in the operating parameters reaches the preset maximum torque of the motor to be calibrated, if it is determined that the operating torque corresponding to the calibration condition in the operating parameters does not reach the preset maximum torque of the motor to be calibrated, the operating torque characterizing the calibration condition is still in the actual operating torque range corresponding to the motor to be calibrated, and the operating torque corresponding to the calibration condition in the operating parameters can be increased according to the preset torque step size, so as to expand the thermal management calibration range of the motor to be calibrated by increasing the operating torque, while ensuring that the motor to be calibrated can normally operate the calibration condition.

[0110] See also Fig.10 , Fig.10 is Figure 8 The flowchart of step S8 in the embodiment shown is in an exemplary embodiment. Fig.10 As shown, the process of increasing the operating speed corresponding to the calibration condition in the operating parameters according to the preset speed step may include steps S11 to S12, which are described in detail as follows:

[0111] In step S11, if the operating speed corresponding to the calibration condition in the operating parameters reaches the preset maximum speed of the motor to be calibrated, the motor to be calibrated and the auxiliary motor are controlled to stop.

[0112] In the implementation mode of the present application, considering that the motor has a corresponding actual operating speed range, in the process of increasing the operating speed corresponding to the calibration condition in the operating parameters according to the preset speed step, it is possible to first determine whether the operating speed corresponding to the calibration condition in the operating parameters reaches the preset maximum speed of the motor to be calibrated, so as to determine whether the operating speed of the motor to be calibrated can be further increased within the actual operating speed range corresponding to the motor to be calibrated, thereby avoiding the operating speed corresponding to the calibration condition in the operating parameters exceeding the actual operating speed range, causing abnormal situations when the motor to be calibrated operates the calibration condition.

[0113] Specifically, if the operating speed corresponding to the calibration condition in the operating parameters reaches the preset maximum speed of the motor to be calibrated, it indicates that the operating speed corresponding to the calibration condition in the operating parameters is close to the boundary speed of the actual operating speed range corresponding to the motor to be calibrated.

[0114] Further considering that the execution of the operation speed corresponding to the calibration condition in the operation parameters according to the preset speed step length is performed after determining that the operating temperature of the motor to be calibrated at the operating speed after the last increase has reached the preset limit temperature, and the other case is performed after determining that the operating torque corresponding to the motor to be calibrated at the operating speed after the last increase has been increased to the preset maximum torque. In either case, the operating temperatures corresponding to the motor to be calibrated at other operating speeds lower than the preset maximum speed in the actual operating speed range at different operating torques have been obtained before, that is, the motor to be calibrated in the transmission box has completed the thermal management calibration, and if the operating speed corresponding to the calibration condition in the operation parameters reaches the preset maximum speed of the motor to be calibrated, the motor to be calibrated and the auxiliary motor can be controlled to stop to avoid the continuous operation of the motor to be calibrated and the auxiliary motor.

[0115] Among them, the method of controlling the shutdown of the motor to be calibrated and the auxiliary motor can be flexibly set as needed. In one example, a shutdown signal can be directly sent to the motor to be calibrated and the auxiliary motor to control the shutdown of the motor to be calibrated and the auxiliary motor, and a multimedia message is generated based on the shutdown signal to instruct the tester that the thermal management calibration of the motor to be calibrated has been completed, so that the tester can know in time that the thermal management calibration of the motor to be calibrated has been completed, and check and review whether the thermal management calibration table corresponding to the motor to be calibrated is correct.

[0116] In another example, a calibration identifier corresponding to the motor to be calibrated can be generated, wherein the calibration identifier indicates that the thermal management calibration of the motor to be calibrated has been completed; then the motor to be calibrated and the auxiliary motor in the transmission box are re-determined according to the calibration identifier, and then the thermal management calibration process is re-executed based on the preset initial speed and the preset initial torque in the operating parameters of the calibration condition, that is, when the operating speed in the operating parameters in the calibration condition is the preset initial speed and the operating torque is the preset initial torque, the operation of the re-determined motor to be calibrated is controlled according to the operating parameters corresponding to the calibration condition, and the operation of the auxiliary motor is controlled according to the auxiliary operating parameters corresponding to the operating parameters of the motor to be calibrated in the calibration condition, and then the operating temperature of the motor to be calibrated is obtained, and finally the operating temperature and the operating parameters corresponding to the calibration condition are associated and stored in the thermal management calibration table corresponding to the re-determined motor to be calibrated, so as to further complete the thermal management calibration of other motors in the transmission box, thereby achieving the purpose of further reducing the labor intensity of production and improving the thermal management calibration efficiency of the motor.

[0117] The method of redetermining the motor to be calibrated and the auxiliary motor in the transmission box according to the calibration mark is that, when the transmission box includes two motors, the motor in the transmission box that does not have a corresponding calibration mark can be directly used as the motor to be calibrated according to the calibration mark, and correspondingly, the motor with the calibration mark can be used as the auxiliary motor.

[0118] When there are more than two motors in the transmission box, the motors in the transmission box that do not have corresponding calibration marks can be determined based on the calibration marks, and then one of the motors that do not have corresponding calibration marks can be selected as the motor to be calibrated, and the remaining motors can be used as auxiliary motors.

[0119] In step S12, if the operating speed corresponding to the calibration condition in the operating parameters does not reach the preset maximum speed of the motor to be calibrated, the operating speed corresponding to the calibration condition in the operating parameters is increased according to the preset speed step.

[0120] In an embodiment of the present application, in the process of judging whether the operating speed corresponding to the calibration condition in the operating parameters reaches the preset maximum speed of the motor to be calibrated, if it is determined that the operating speed corresponding to the calibration condition in the operating parameters does not reach the preset maximum speed of the motor to be calibrated, then the operating speed representing the calibration condition is still in the actual operating speed range corresponding to the motor to be calibrated, and the operating speed corresponding to the calibration condition in the operating parameters can be increased according to the preset speed step, so as to expand the thermal management calibration range of the motor to be calibrated by increasing the operating speed, under the premise of ensuring that the motor to be calibrated can normally operate the calibration condition.

[0121] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary technical means in the art that are not disclosed in the present application.

[0122] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A thermal management calibration system, characterized in that: include: A transmission box, wherein the transmission box includes at least two motors, each of which is provided with a corresponding temperature collection module for collecting the temperature of the motor; A controller is electrically connected to the motor and the temperature acquisition module in the transmission box, and the controller is configured to perform the following steps: Determining the motor to be calibrated and the auxiliary motor in the transmission box; Controlling the motor to be calibrated and the auxiliary motor to run a thermal management calibration process to obtain a thermal management calibration table corresponding to the motor to be calibrated; The thermal management calibration process includes: Controlling the operation of the motor to be calibrated according to the operating parameters corresponding to the calibration working condition; wherein the calibration working condition is the working condition indicated by the thermal management calibration process; Controlling the operation of the auxiliary motor according to the auxiliary operating parameters corresponding to the operating parameters of the motor to be calibrated in the calibration condition; Obtaining the operating temperature of the motor to be calibrated; The operating temperature and the operating parameters corresponding to the calibration working condition are associated and stored in a thermal management calibration table corresponding to the motor to be calibrated.

2. The thermal management calibration system according to claim 1, characterized in that: After executing the step of associating and storing the operating temperature and the operating parameters corresponding to the calibration working condition in the thermal management calibration table corresponding to the motor to be calibrated, the controller is further configured to execute the following steps: Adjusting the operating parameters corresponding to the calibration condition according to the operating temperature and the preset limit temperature of the motor to be calibrated; The thermal management calibration process is re-executed based on the operating parameters adjusted according to the calibration condition.

3. The thermal management calibration system according to claim 2, characterized in that: The step of adjusting the operating parameters corresponding to the calibration condition according to the operating temperature and the preset limit temperature of the motor to be calibrated includes: If the operating temperature does not reach the preset limit temperature of the motor to be calibrated, the operating torque corresponding to the calibration condition in the operating parameters is increased according to the preset torque step; If the operating temperature reaches the preset limit temperature, the operating speed corresponding to the calibration condition in the operating parameters is increased according to the preset speed step, and the operating torque corresponding to the calibration condition in the operating parameters is adjusted to the preset initial torque of the motor to be calibrated.

4. The thermal management calibration system according to claim 3, characterized in that: The step of increasing the operating torque corresponding to the calibration condition in the operating parameters according to the preset torque step size includes: If the operating torque corresponding to the calibration condition in the operating parameters reaches the preset maximum torque of the motor to be calibrated, the operating torque corresponding to the calibration condition in the operating parameters is adjusted to the preset initial torque of the motor to be calibrated, and the operating speed corresponding to the calibration condition in the operating parameters is increased according to the preset speed step; If the operating torque corresponding to the calibration condition in the operating parameters does not reach the preset maximum torque of the motor to be calibrated, the operating torque corresponding to the calibration condition in the operating parameters is increased according to the preset torque step.

5. The thermal management calibration system according to claim 3, characterized in that: The step of increasing the operating speed corresponding to the calibration condition in the operating parameters according to the preset speed step size includes: If the operating speed corresponding to the calibration condition in the operating parameters reaches the preset maximum speed of the motor to be calibrated, the motor to be calibrated and the auxiliary motor are controlled to stop; If the operating speed corresponding to the calibration condition in the operating parameters does not reach the preset maximum speed of the motor to be calibrated, the operating speed corresponding to the calibration condition in the operating parameters is increased according to the preset speed step.

6. The thermal management calibration system according to claim 5, characterized in that: The controlling the motor to be calibrated and the auxiliary motor to stop includes: Generate a calibration mark corresponding to the motor to be calibrated; Re-determine the motor to be calibrated and the auxiliary motor in the transmission box according to the calibration mark; Re-executing the thermal management calibration process based on the preset initial speed and the preset initial torque in the operating parameters of the calibration condition; In the case that each motor in the transmission box has a corresponding calibration mark, the motor to be calibrated and the auxiliary motor are controlled to stop.

7. The thermal management calibration system according to claim 1, characterized in that: The temperature acquisition module includes a stator temperature measuring unit for acquiring the stator temperature in the motor and a rotor temperature measuring unit for acquiring the rotor temperature in the motor; The controller is electrically connected to the stator temperature measuring unit and the rotor temperature measuring unit respectively; the controller is also configured to perform the following steps: Acquiring the stator temperature and rotor temperature of the motor to be calibrated; The operating temperature of the motor to be calibrated is calculated according to the stator temperature and the rotor temperature.

8. The thermal management calibration system according to claim 7, characterized in that: The rotor temperature measuring unit includes a rotor temperature measuring piece, a rotor temperature measuring tool, a rotor end of the temperature measuring device and a stator end of the temperature measuring device; The rotor temperature measuring element is arranged on the magnetic steel of the motor rotor; The rotor temperature measuring fixture is fixed to one end of the motor shaft by a fixture fastening bolt; The rotor end of the temperature measuring device is arranged on the rotor temperature measuring tooling and is electrically connected to the rotor temperature measuring element; The stator end of the temperature measuring device is arranged on the housing of the transmission box and is connected to the rotor temperature measuring component and the controller respectively.

9. The thermal management calibration system according to claim 8, characterized in that: The tool fastening bolt is provided with a hollow hole, and the hollow hole is used to allow a signal line electrically connected to the rotor end of the temperature measuring device to pass into the cavity of the motor shaft; A threading hole is provided on the side wall of the rotating shaft, and the threading hole is used to allow the signal line to pass through the cavity of the rotating shaft and be electrically connected to the rotor temperature measuring component.

10. The thermal management calibration system according to claim 9, characterized in that: The hollow hole is filled with sealant.

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