Drum-based vehicle motor test method, apparatus, electronic device, and program product

Abstract

The application discloses a kind of based on drum's vehicle motor test method, device, electronic equipment and program product. It is related to the new energy automobile test technical field, the method includes: target vehicle is fixed to drum test bench, and the motor power of target motor in target vehicle is limited by calibration equipment, to obtain the test power of target motor;Obtain the driving speed of target vehicle, and the operating parameter of target motor under driving speed is collected by calibration equipment, and the target motor power of target motor is determined according to operating parameter;In the case where target motor power reaches test power, obtain the motor temperature data of target motor in preset time period, and when motor temperature data meets preset condition, end test.The technical scheme limits motor power by calibration equipment, and the motor temperature under target power is detected, so that the working performance of motor under certain state can be tested, and simple and real motor performance test detection is realized.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle testing technology, and in particular to a vehicle motor testing method, apparatus, electronic equipment, and program product based on a rotating drum. Background Technology

[0002] Vehicle motor testing is a core component in evaluating their performance, reliability, and safety. With the development of new energy vehicles, motors need to maintain high efficiency across a wide speed and torque range, which places higher demands on testing methods.

[0003] In related technologies, a common method for testing motors is to use a motor-to-load method. This involves connecting the test motor to a load motor, with the test motor driving the load motor to rotate, thereby generating a reverse braking torque on the test motor. However, this testing method relies on active control of the accelerator pedal's output power of the test motor, which is prone to power fluctuations, leading to errors in the actual performance testing of the motor. Summary of the Invention

[0004] This invention provides a vehicle motor testing method, apparatus, electronic equipment, and program product based on a drum, to solve the technical problem of low accuracy in motor performance testing caused by insufficient motor power control precision.

[0005] According to one aspect of the present invention, a method for testing vehicle motors based on a rotating drum is provided, the method comprising:

[0006] The target vehicle is fixed on the drum test bench, and the motor power of the target motor in the target vehicle is limited by the calibration equipment to obtain the test power of the target motor; wherein, the drum test bench is used to synchronize the drum rotation with the driving speed of the target vehicle;

[0007] The vehicle speed of the target vehicle is obtained, and the operating parameters of the target motor at the vehicle speed are collected by the calibration device. The target motor power of the target motor is determined based on the operating parameters.

[0008] When the target motor power reaches the test power, the motor temperature data of the target motor is acquired within a preset time period, and the test ends when the motor temperature data meets the preset conditions.

[0009] According to another aspect of the present invention, a vehicle motor testing apparatus based on a rotating drum is provided, the apparatus comprising:

[0010] A motor power limiting module is used to fix the target vehicle onto a drum test bench and limit the motor power of the target motor in the target vehicle through calibration equipment to obtain the test power of the target motor; wherein, the drum test bench is used to synchronize the drum rotation with the driving speed of the target vehicle;

[0011] The motor power determination module is used to obtain the driving speed of the target vehicle, and to collect the operating parameters of the target motor at the driving speed through the calibration device, and to determine the target motor power of the target motor based on the operating parameters.

[0012] The motor temperature detection module is used to acquire motor temperature data of the target motor within a preset time period when the target motor power reaches the test power, and to end the test when the motor temperature data meets preset conditions.

[0013] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0014] One or more processors; and a memory communicatively connected to at least one of the processors; wherein the memory stores a computer program executable by at least one of the processors, which, when executed by one or more of the processors, causes one or more of the processors to implement the drum-based vehicle motor testing method according to embodiments of the present invention.

[0015] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the drum-based vehicle motor testing method described in the embodiments of the present invention.

[0016] According to another aspect of the present invention, this disclosure also provides a computer program product, including a computer program that, when executed by a processor, implements the vehicle motor testing method based on a rotating drum as described in the embodiments of the present invention.

[0017] The technical solution of this invention involves fixing a target vehicle onto a rotary drum test bench and limiting the motor power of a target motor in the target vehicle using a calibration device to obtain the test power of the target motor. The rotary drum test bench is used to synchronize the drum rotation with the vehicle's speed. The vehicle's speed is acquired, and the calibration device collects the operating parameters of the target motor at that speed. The target motor power is determined based on these operating parameters. When the target motor power reaches the test power, the motor temperature data of the target motor is acquired within a preset time period. The test ends when the motor temperature data meets preset conditions. By tracking and calculating the target motor power and detecting the motor temperature at the test power, the thermal management operation of the motor under actual vehicle load can be simulated. This ensures the accuracy of the motor performance test under the limited test power, making the test results more realistic, reliable, and accurate, and avoiding the technical problem of inaccurate motor thermal management test results caused by motor power fluctuations.

[0018] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a flowchart of a vehicle motor testing method based on a rotating drum according to Embodiment 1 of the present invention;

[0021] Figure 2 This is a flowchart of a vehicle motor testing method based on a rotating drum according to Embodiment 2 of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of a vehicle motor testing device based on a rotating drum according to Embodiment 3 of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of an electronic device for implementing the vehicle motor testing method based on a rotating drum provided in Embodiment 4 of the present invention. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "test power," "target motor power," "motor speed," and "target speed," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0027] It is understood that the data involved in this technical solution (including but not limited to the data itself, the acquisition or use of the data) shall comply with the requirements of relevant laws, regulations and related provisions.

[0028] Example 1

[0029] Figure 1 A flowchart of a vehicle motor testing method based on a drum is provided for Embodiment 1 of the present invention. This embodiment is applicable to scenarios where the performance of motors in vehicles is tested, especially in scenarios where the thermal management performance of motors in new energy vehicles is tested. This method can be executed by a drum-based vehicle motor testing device, which can be implemented in hardware and / or software, optionally through electronic devices such as mobile terminals, PCs, or servers. Figure 1 As shown, the method may specifically include:

[0030] S110. Fix the target vehicle onto the drum test bench and limit the motor power of the target motor in the target vehicle through calibration equipment to obtain the test power of the target motor; wherein, the drum test bench is used to synchronize the drum rotation with the driving speed of the target vehicle.

[0031] In this technical solution, the target vehicle can be understood as the vehicle undergoing motor testing; the primary test vehicle is a new energy electric commercial vehicle. The drum test bench can be understood as an indoor testing device simulating actual road driving resistance, typically composed of a metal drum, loading device, and measuring device to accurately measure the torque and speed output by the vehicle's drive wheels. The calibration equipment can be understood as a testing system composed of a host computer, frequency converter, dynamometer, etc. It can generate power limit commands through the host computer, causing the frequency converter to actually execute the command information to limit the motor's torque or current, and use the dynamometer to detect the actual output power of the target motor, thereby ensuring that the target motor's output power is within the limit requirements. Furthermore, in this technical solution, the calibration equipment can also be used to collect the target motor's operating parameters. Motor power can be understood as the mechanical power output by the motor during operation, representing the motor's ability to do work. Test power can be understood as the maximum allowable power upper limit of the motor's actual output under the constraints of the calibration equipment.

[0032] Specifically, the target vehicle is fixed onto a rotary drum test bench to synchronize its speed with the drum. Then, the output power of the target motor is continuously monitored using testing equipment in the calibration setup. By sending control commands, the maximum output power of the target motor can be limited, thus obtaining the maximum power that the target motor can output under the test scenario, which is then used as the test power of the target motor. This technical solution, by employing technical means to limit the output power of the target motor, can accurately simulate the motor's operating state in a real-world scenario and achieve standardized, repeatable implementation, thereby improving the accuracy and reliability of motor thermal management performance testing.

[0033] Furthermore, in an optional testing method, the drum test bench can be replaced with an electric drive axle load trailer, thereby simulating and testing the thermal management performance of the target vehicle's motor through an actual trailer, and thus realizing the testing of the motor's thermal management performance under different test scenarios.

[0034] S120. Obtain the driving speed of the target vehicle, and collect the operating parameters of the target motor at the driving speed through the calibration device, and determine the target motor power of the target motor based on the operating parameters.

[0035] The vehicle speed can be understood as the simulated straight-line speed of the target vehicle on the rotary drum test bench. Operating parameters include at least motor voltage, motor current, motor speed, and motor temperature data, and may also include parameters such as motor inlet water temperature and motor cooling water pump opening. The target motor power can be understood as the motor output power value obtained based on the real-time collected operating parameters.

[0036] Specifically, tests are conducted on the target vehicle to obtain its real-time speed, and the operating parameters of the target motor at any given speed are collected using calibration equipment. Then, the actual power of the target motor is determined based on the collected operating parameters. This technical solution, by collecting the actual motor power during the test, can determine whether the target motor power meets the test requirements. Adjustments to the target vehicle speed are then made to ensure that the power required for the test is met, thus ensuring the accuracy of the motor performance test.

[0037] In one embodiment, determining the target motor power of the target motor based on the operating parameters includes: calculating the target motor power of the target motor based on the motor voltage and motor current in the operating parameters.

[0038] Here, motor voltage can be understood as the three-phase AC phase voltage output by the motor controller inverter, or the DC voltage on the DC bus side of the motor controller. Motor current can be understood as the three-phase AC current output by the motor controller, or the DC bus current on the DC bus side.

[0039] Specifically, the target motor power at the current vehicle speed can be calculated using the motor voltage and current collected from the target motor by the calibration equipment and the power calculation formula. Furthermore, after calculating the actual input voltage to the motor, the actual motor power during actual operation can be determined based on the power loss after input to the motor, and this actual motor power can be used as the target motor power.

[0040] In another embodiment, determining the target motor power of the target motor based on the operating parameters includes: comparing the motor speed in the operating parameters with the target speed corresponding to the test power; and, when the motor speed reaches the target speed, calculating the target motor power of the target motor based on the motor voltage and motor current in the operating parameters.

[0041] Here, motor speed can be understood as the actual motor speed of the target vehicle at different driving speeds. Target speed can be understood as the motor speed of the target vehicle at the test power.

[0042] Specifically, it can also obtain the target speed of the target motor under the test power, and compare the motor speed at different vehicle speeds with the target speed. Then, when the motor speed reaches the target speed, the target motor power can be calculated based on the motor voltage and motor current data in the target motor's operating parameters. This allows the motor's operating power to be calculated only when the motor speed reaches a certain value, reducing the amount of invalid calculation of motor power and improving the reliability of motor power calculation based on motor speed.

[0043] S130. When the target motor power reaches the test power, acquire the motor temperature data of the target motor within a preset time period, and end the test when the motor temperature data meets the preset conditions.

[0044] The preset time period can be understood as the continuous operating time window used to evaluate the thermal management performance of the target motor after the target motor power reaches the test power. For example, the preset time period can include continuous operation for 5 seconds, 10 seconds, 30 seconds, etc. Motor temperature data can be understood as temperature data at multiple relevant parts to evaluate the motor's thermal management performance. Typically, motor temperature data can include temperature data at parts such as winding coils, permanent magnets, housing, or insulated gate bipolar transistors (IGBT power modules). Preset conditions can be understood as one or more critical judgment logics set by engineers in the equipment according to the test specifications before the test begins. These can include the highest safe threshold that the temperature can reach, or the temperature fluctuation rate being lower than a certain preset value within the preset time period, i.e., the temperature reaching thermal equilibrium.

[0045] Specifically, when the target motor's power reaches the pre-limited test power, the calibration equipment acquires the motor temperature data from the current moment to a preset time period. If any motor temperature data within a subsequent preset time period meets the preset conditions, the test bench automatically terminates the test and saves the results. This technical solution effectively verifies the motor's thermal management capability or heat dissipation performance under a set limit output power by detecting and comparing the target motor's thermal management data after reaching the test power, thus achieving a simple, efficient, and reliable motor performance test.

[0046] In one embodiment, before the target motor power reaches the test power, the method further includes: comparing the target motor power with the test power; if the target motor power is less than the test power, adjusting the driving speed of the target vehicle; and collecting the operating parameters of the target motor at the adjusted driving speed of the target vehicle until the target motor power corresponding to the operating parameters reaches the test power.

[0047] Specifically, the calibration equipment can collect the operating parameters of the target motor at different vehicle speeds and calculate the target motor power based on these parameters. The calculated target motor power is then compared with a pre-set test power. If the target motor power at the current driving speed is less than the test power, the vehicle speed can be increased to improve the motor output power. The operating parameters of the target motor are collected again after increasing the driving speed, and the target motor power at subsequent driving speeds is calculated and compared with the preset test power. This iterative calculation continues until the target motor power calculated based on the operating parameters reaches the test power. At this point, adjusting or increasing the vehicle speed stops, and a thermal management performance test of the target motor at the test power is initiated. This technical solution increases the power of the target motor in the target vehicle by increasing the vehicle speed. After reaching the limited test power, the thermal management test of the target motor is initiated. This can effectively overcome the physical bottleneck of insufficient motor performance output at low speeds, thereby effectively testing the test power in actual load scenarios. This ensures that the target motor can maintain a balance in motor thermal management under test power, and avoids the motor performance failing to meet the continuous operation of the target vehicle under high load conditions.

[0048] The technical solution of this invention involves fixing a target vehicle onto a rotary drum test bench and limiting the motor power of a target motor in the target vehicle using a calibration device to obtain the test power of the target motor. The rotary drum test bench is used to synchronously rotate the drum with the vehicle's speed. The vehicle's speed is acquired, and the calibration device collects the operating parameters of the target motor at that speed. The target motor power is determined based on the operating parameters. When the target motor power reaches the test power, the motor temperature data of the target motor is acquired within a preset time period. The test ends when the motor temperature data meets preset conditions. The technical solution of this invention involves fixing a target vehicle onto a rotary drum test bench and limiting the motor power of a target motor in the target vehicle using a calibration device to obtain the test power of the target motor. The rotary drum test bench is used to synchronize the drum rotation with the vehicle's speed. The vehicle's speed is acquired, and the calibration device collects the operating parameters of the target motor at that speed. The target motor power is determined based on these operating parameters. When the target motor power reaches the test power, the motor temperature data of the target motor is acquired within a preset time period. The test ends when the motor temperature data meets preset conditions. By tracking and calculating the target motor power and detecting the motor temperature at the test power, the thermal management operation of the motor under actual vehicle load can be simulated. This ensures the accuracy of the motor performance test under the limited test power, making the test results more realistic, reliable, and accurate, and avoiding the technical problem of inaccurate motor thermal management test results caused by motor power fluctuations.

[0049] Example 2

[0050] Figure 2 This is a flowchart of a vehicle motor testing method based on a rotary drum, provided in Embodiment 2 of the present invention. This embodiment refines the technical solution of "acquiring motor temperature data of the target motor within a preset time period when the target motor power reaches the test power, and ending the test when the motor temperature data meets preset conditions" based on the above embodiments. Detailed implementation methods can be found in the description of this embodiment. Technical features that are the same as or similar to those in the foregoing embodiments will not be repeated here. Figure 2 As shown, the method may specifically include:

[0051] S210. Fix the target vehicle onto the drum test bench and limit the motor power of the target motor in the target vehicle through calibration equipment to obtain the test power of the target motor; wherein, the drum test bench is used to synchronize the drum rotation with the driving speed of the target vehicle.

[0052] S220. Obtain the driving speed of the target vehicle, and collect the operating parameters of the target motor at the driving speed through the calibration device, and determine the target motor power of the target motor based on the operating parameters.

[0053] S230. When the target motor power reaches the test power, the motor temperature data of the target motor at multiple time points within a preset time period are acquired in chronological order.

[0054] Specifically, when the target motor power reaches the test power, the motor temperature data can be acquired at multiple time points within a preset time period using calibration equipment, following a chronological order. By collecting motor temperature data for the entire preset time period, the accuracy of motor thermal management performance testing can be improved based on more comprehensive motor temperature data.

[0055] S240. Determine the average motor temperature based on the motor temperature data at multiple time points, and calculate the difference between the motor temperature data at each time point and the average motor temperature. If the absolute value of multiple difference results is less than the discrimination threshold, the test ends.

[0056] The absolute value of the difference result can be understood as some motor temperature data being lower than the average motor temperature. By comparing the absolute values, the fluctuation of motor temperature can be analyzed purely based on temperature deviation. The discrimination threshold can be understood as the maximum allowable deviation of motor temperature set in advance. For example, the discrimination threshold can be a temperature value such as 1℃ or 2℃.

[0057] Specifically, the average motor temperature of the target motor within a preset time period can be determined by averaging the motor temperature data collected at multiple time points. Then, the difference between the motor temperature data collected at each time point and the average motor temperature is calculated to determine the magnitude of the change in motor temperature at each time point relative to the average motor temperature. If the absolute value of the differences across multiple time points is less than the allowable error threshold, it indicates that the target motor is in a balanced and stable thermal management state within the preset time period, and the test on the target motor can be terminated. It should be further clarified that "the absolute value of multiple differences is less than the threshold" can also be understood as the motor's thermal management performance meeting the test requirements when the differences corresponding to the motor temperature data at a preset number of time points are less than the threshold. For example, if the differences corresponding to the motor temperature data at 90% of the time points are less than the threshold, the motor is considered to meet the thermal management test requirements, and the test on the motor can also be terminated. This technical solution calculates motor temperature data over a period of time, thereby avoiding the impact of extreme motor temperatures at a certain moment on motor thermal management tests. Furthermore, by comprehensively analyzing and calculating multiple motor temperature data, it improves the accuracy, reliability, and robustness of motor thermal management performance evaluation.

[0058] In another embodiment, the step of acquiring motor temperature data of the target motor within a preset time period when the target motor power reaches the test power, and ending the test when the motor temperature data meets a preset condition, includes: acquiring motor temperature data of the target motor at multiple time points within the preset time period in chronological order when the target motor power reaches the test power; comparing the motor temperature data collected at each time point with a preset safety limit, so that the test is immediately ended when the motor temperature data at any time point exceeds the preset safety limit.

[0059] The preset safety limit can be understood as a preset, fixed, and absolute physical limit value for motor temperature. For example, the preset safety limit for the winding coil can be 180°C, and the preset safety limit for the insulated gate bipolar transistor (IGBT power module) can be 150°C.

[0060] Specifically, when the target motor power reaches the test power, the motor temperature data can be collected sequentially at multiple time points within a preset time period. The motor temperature data collected at each time point can be compared in real-time with preset safety limits. If the motor temperature data collected at any time point exceeds the preset safety limit, the test on the motor thermal management will immediately end. This technical solution, by setting preset safety limits for each component of the motor and immediately ending the test when these limits are exceeded, can avoid potential damage to the motor due to extreme temperatures, thereby protecting the motor's hardware.

[0061] Furthermore, the two methods for ending the test described in this embodiment can be implemented simultaneously or one of them can be used to achieve extreme thermal management testing of the target motor and ensure the safety protection of the target motor.

[0062] Furthermore, if the target motor fails to meet the test requirements, the motor thermal management test can be continued by adjusting the test power of the motor and adding heat dissipation equipment to ensure that the motor can meet the heat dissipation requirements under the test power.

[0063] The technical solution of this invention involves acquiring time-temperature data of the target motor at multiple time points within a preset time period, in chronological order, when the target motor power reaches the test power. An average motor temperature is determined based on the motor temperature data at these multiple time points. The difference between the motor temperature data at each time point and the average motor temperature is calculated. The test ends when the absolute value of the multiple difference results is less than a discrimination threshold. This eliminates test differences caused by the initial ambient temperature and, based on multiple motor temperature data, achieves a more comprehensive and accurate temperature data comparison, thereby improving the reliability of motor temperature fluctuation detection tests.

[0064] Example 3

[0065] Figure 3 This is a schematic diagram of the structure of the vehicle motor testing device based on a rotating drum provided in Embodiment 4 of the present invention. Figure 3 As shown, the device includes: a motor power limiting module 301, a motor power determining module 302, and a motor temperature detection module 303.

[0066] The system includes a motor power limiting module 301, which is used to fix the target vehicle onto the drum test bench and limit the motor power of the target motor in the target vehicle through calibration equipment to obtain the test power of the target motor; wherein the drum test bench is used to synchronize the drum rotation with the driving speed of the target vehicle; a motor power determining module 302, which is used to acquire the driving speed of the target vehicle and collect the operating parameters of the target motor at the driving speed through the calibration equipment, and determine the target motor power of the target motor based on the operating parameters; and a motor temperature detection module 303, which is used to acquire the motor temperature data of the target motor within a preset time period when the target motor power reaches the test power, and end the test when the motor temperature data meets the preset conditions.

[0067] The technical solution of this invention includes the following steps: First, the motor power limiting module 301 fixes the target vehicle onto a rotary drum test bench and limits the motor power of the target motor in the target vehicle using a calibration device to obtain the test power of the target motor; wherein, the rotary drum test bench is used to synchronize the rotation of the drum with the driving speed of the target vehicle. Second, the motor power determining module 302 can acquire the driving speed of the target vehicle and collect the operating parameters of the target motor at the driving speed using the calibration device, and determine the target motor power based on the operating parameters. Finally, the motor temperature detection module 303 can acquire the motor temperature data of the target motor within a preset time period when the target motor power reaches the test power, and end the test when the motor temperature data meets preset conditions. The technical solution of this invention involves fixing a target vehicle onto a rotary drum test bench and limiting the motor power of a target motor in the target vehicle using a calibration device to obtain the test power of the target motor. The rotary drum test bench is used to synchronize the drum rotation with the vehicle's speed. The vehicle's speed is acquired, and the calibration device collects the operating parameters of the target motor at that speed. The target motor power is determined based on these operating parameters. When the target motor power reaches the test power, the motor temperature data of the target motor is acquired within a preset time period. The test ends when the motor temperature data meets preset conditions. By tracking and calculating the target motor power and detecting the motor temperature at the test power, the thermal management operation of the motor under actual vehicle load can be simulated. This ensures the accuracy of the motor performance test under the limited test power, making the test results more realistic, reliable, and accurate, and avoiding the technical problem of inaccurate motor thermal management test results caused by motor power fluctuations.

[0068] Based on the above-mentioned optional technical solutions, the motor power determination module 302 may optionally include a motor power calculation unit. The motor power calculation unit is used to calculate the target motor power of the target motor based on the motor voltage and motor current in the operating parameters.

[0069] Based on the above-mentioned optional technical solutions, the vehicle motor testing device based on the drum may optionally include: a vehicle speed adjustment unit and a motor power tracking unit. The vehicle speed adjustment unit is used to compare the target motor power with the test power before the target motor power reaches the test power; if the target motor power is less than the test power, the vehicle speed of the target vehicle is adjusted. The motor power tracking unit is used to collect the operating parameters of the target motor at the adjusted vehicle speed until the target motor power corresponding to the operating parameters reaches the test power.

[0070] Based on the above-mentioned optional technical solutions, the motor power determination module 302 may optionally include: a motor speed acquisition unit and a motor power calculation unit. The motor speed acquisition unit is used to compare the motor speed in the operating parameters with the target speed corresponding to the test power. The motor power calculation unit is further used to calculate the target motor power of the target motor based on the motor voltage and motor current in the operating parameters when the motor speed reaches the target speed.

[0071] Based on the above-mentioned optional technical solutions, the motor temperature detection module 303 may optionally include: a motor temperature data acquisition unit and a motor temperature comparison unit. The motor temperature data acquisition unit is used to acquire time-temperature data of the target motor at multiple time points within a preset time period, in chronological order, when the target motor power reaches the test power. The motor temperature comparison unit is used to determine the average motor temperature based on the motor temperature data at multiple time points, calculate the difference between the motor temperature data at each time point and the average motor temperature, and terminate the test if the absolute value of multiple difference results is less than a discrimination threshold.

[0072] Based on the above-mentioned optional technical solutions, the motor temperature detection module 303 may optionally include: a motor temperature data acquisition unit and a motor temperature comparison unit. The motor temperature data acquisition unit is used to acquire time-temperature data of the target motor at multiple time points within a preset time period, in chronological order, when the target motor power reaches the test power. The motor temperature comparison unit is used to compare the motor temperature data acquired at each time point with a preset safety limit, so that the test is immediately terminated if the motor temperature data at any time point exceeds the preset safety limit.

[0073] Based on the above-mentioned optional technical solutions, the operating parameters may optionally include at least motor voltage, motor current, motor speed, and motor temperature data.

[0074] The vehicle motor testing device based on a rotating drum provided in this invention can execute the vehicle motor testing method based on a rotating drum provided in any embodiment of this invention, and has the corresponding functional modules and beneficial effects of the method.

[0075] Example 4

[0076] Figure 4 A schematic diagram of an electronic device 10, which can be used to implement embodiments of the present invention, is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0077] like Figure 4 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0078] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0079] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the drum-based vehicle motor testing method.

[0080] In some embodiments, the drum-based vehicle motor testing method can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the drum-based vehicle motor testing method described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform the drum-based vehicle motor testing method by any other suitable means (e.g., by means of firmware).

[0081] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0082] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0083] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0084] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0085] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0086] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0087] In particular, according to embodiments of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program carried on a non-transitory computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication unit 19, or installed from storage unit 18, or installed from ROM 12. When the computer program is executed by processor 11, it performs the functions defined in the methods of the embodiments of the present invention.

[0088] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0089] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A vehicle motor testing method based on a rotating drum, characterized in that, include: The target vehicle is fixed on the drum test bench, and the motor power of the target motor in the target vehicle is limited by the calibration equipment to obtain the test power of the target motor; wherein, the drum test bench is used to synchronize the drum rotation with the driving speed of the target vehicle; The vehicle speed of the target vehicle is obtained, and the operating parameters of the target motor at the vehicle speed are collected by the calibration device. The target motor power of the target motor is determined based on the operating parameters. When the target motor power reaches the test power, the motor temperature data of the target motor is acquired within a preset time period, and the test ends when the motor temperature data meets the preset conditions.

2. The vehicle motor testing method based on a rotating drum according to claim 1, characterized in that, Determining the target motor power based on the operating parameters includes: The target motor power is calculated based on the motor voltage and motor current in the operating parameters.

3. The vehicle motor testing method based on a rotating drum according to claim 2, characterized in that, Before the target motor power reaches the test power, the method further includes: The target motor power is compared with the test power. If the target motor power is less than the test power, the driving speed of the target vehicle is adjusted. The operating parameters of the target motor of the target vehicle at the adjusted driving speed are collected until the power of the target motor corresponding to the operating parameters reaches the test power.

4. The vehicle motor testing method based on a rotating drum according to claim 1, characterized in that, Determining the target motor power based on the operating parameters includes: Compare the motor speed in the operating parameters with the target speed corresponding to the test power; When the motor speed reaches the target speed, the target motor power is calculated based on the motor voltage and motor current in the operating parameters.

5. The vehicle motor testing method based on a rotating drum according to claim 1, characterized in that, The step of acquiring motor temperature data of the target motor within a preset time period when the target motor power reaches the test power, and ending the test when the motor temperature data meets preset conditions, includes: When the target motor power reaches the test power, the motor temperature data of the target motor at multiple time points within a preset time period are acquired in chronological order. The average motor temperature is determined based on the motor temperature data at multiple time points, and the difference between the motor temperature data at each time point and the average motor temperature is calculated. The experiment ends when the absolute value of multiple difference results is less than the discrimination threshold.

6. The vehicle motor testing method based on a rotating drum according to claim 1, characterized in that, The step of acquiring motor temperature data of the target motor within a preset time period when the target motor power reaches the test power, and ending the test when the motor temperature data meets preset conditions, includes: When the target motor power reaches the test power, the motor temperature data of the target motor at multiple time points within a preset time period are acquired in chronological order. The motor temperature data collected at each time point is compared with a preset safety limit. If the motor temperature data at any time point exceeds the preset safety limit, the test is terminated immediately.

7. The vehicle motor testing method based on a rotating drum according to claim 1, characterized in that, The operating parameters include at least the motor voltage, motor current, motor speed, and motor temperature data.

8. A control device for an electrically controlled fan in a vehicle, characterized in that, The device includes: A motor power limiting module is used to fix the target vehicle onto a drum test bench and limit the motor power of the target motor in the target vehicle through calibration equipment to obtain the test power of the target motor; wherein, the drum test bench is used to synchronize the drum rotation with the driving speed of the target vehicle; The motor power determination module is used to obtain the driving speed of the target vehicle, and to collect the operating parameters of the target motor at the driving speed through the calibration device, and to determine the target motor power of the target motor based on the operating parameters. The motor temperature detection module is used to acquire motor temperature data of the target motor within a preset time period when the target motor power reaches the test power, and to end the test when the motor temperature data meets preset conditions.

9. An electronic device, characterized in that, The electronic device includes: One or more processors; Storage device for storing one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the drum-based vehicle motor testing method as described in any one of claims 1-7.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the vehicle motor testing method based on a drum as described in any one of claims 1-7.

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