CN116338356A - Test device, method, equipment and medium for electric drive system - Google Patents

Abstract

The invention relates to a testing device, a testing method, testing equipment and testing media of an electric drive system, comprising the following steps: the dynamometer is arranged on the test bed and connected with the electric driving assembly, and is used for applying a simulated load to the electric driving assembly; the dynamometer controller is arranged on the test bed and connected with the dynamometer, and is used for setting the simulated load of the dynamometer based on a target working condition; the motor controller is arranged on the test bed and connected with the electric driving assembly, and is used for controlling the electric driving assembly to perform working condition test under the simulated load based on motor driving data corresponding to the target working condition; and the detection sensor is connected with the electric driving assembly and used for collecting the operation data of the electric driving assembly in the working condition test. The invention aims at the performance test of the electric drive system, can effectively reduce the test cost and improve the test efficiency.

Description

Test device, method, equipment and medium for electric drive system

technical field

The invention relates to the technical field of vehicle power systems, in particular to a test device, method, equipment and medium of an electric drive system.

Background technique

The electric drive system is the power output unit of an electric vehicle. During the product development process of the electric drive system, performance testing is required to analyze the performance of the electric drive system.

At present, there are problems of high test cost and low test efficiency when performing performance tests on electric drive systems. For example, the patent document of Chinese Invention Patent Publication No. CN104729859A discloses a vehicle climbing test method and test system, including S1, the test environment before the test and the preparation steps of the test vehicle; S2, preheating the test vehicle and the chassis dynamometer S3, carry out the road sliding test to the test vehicle, and record the operating data in the test process simultaneously, the step of the road sliding test comprises: S10, set the road simulation resistance coefficient on the chassis dynamometer, carry out the road sliding test, and judge the sliding Whether it is normal; S20. If it is judged that the sliding is normal, gradually increase the gradient of the slope until the engine speed reaches the maximum torque speed and the vehicle speed is stable. Analyzing; S30, performing a maximum climbing test; S4, performing data analysis according to the data recorded in step S3. It tests the engine performance of the vehicle by configuring simulation coefficients in the chassis dynamometer to test the test vehicle on the chassis dynamometer. The testing process is relatively complicated, requires a lot of manpower and material resources, and has the problems of high testing cost and low testing efficiency.

Contents of the invention

The object of the present invention is to provide a test device, method, equipment and medium for an electric drive system, so as to solve the problems of high test cost and low test efficiency of the electric drive system in the prior art.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

The invention provides a test device for an electric drive system, comprising:

A dynamometer, set on the test bench, connected to the electric drive assembly, for imposing a simulated load on the electric drive assembly;

A dynamometer controller, which is arranged on the test bench and connected to the dynamometer, is used to set the simulated load of the dynamometer based on the target working condition;

The motor controller is set on the test bench and connected to the electric drive assembly, and is used to control the electric drive assembly to perform the working condition under the simulated load based on the motor drive data corresponding to the target working condition. testing; and

The detection sensor is connected with the electric drive assembly, and is used for collecting operation data of the electric drive assembly during the working condition test.

According to the above technical means, the electric drive system can be tested on the test bench based on the load and motor drive data under the target working condition, so as to obtain the operating data under the target working condition, which provides a data basis for performance analysis. The test device can perform the performance test of the electric drive system under the target working condition by simply testing the components and configuring the load and motor drive data matching the working condition, which reduces the test cost and improves the test efficiency.

Further, the target operating condition is set as the vehicle accelerates from an initial vehicle speed to a plurality of preset vehicle speed thresholds under a road condition with a preset slope.

According to the above-mentioned technical means, based on the test requirements, the operating performance of the electric drive system under the road condition with a set slope can be tested.

Further, the motor driving data is obtained from an actual test of a vehicle of the same mass corresponding to the electric drive assembly in the target working condition, wherein the motor driving data includes test speed data and test torque data.

According to the above-mentioned technical means, the motor driving data is the data obtained by testing the actual vehicle under actual working conditions, and the testing accuracy can be improved when testing based on the motor driving data.

Furthermore, before the motor controller controls the electric drive assembly to perform a working condition test, the motor controller is also used to control the operation of the electric drive assembly so that the electric drive assembly reaches a preset working temperature.

According to the above-mentioned technical means, it can be ensured that the electric drive components reach the normal operating temperature before performing the working condition test.

Further, the detection sensor includes:

a torque sensor, arranged between the electric drive assembly and the dynamometer, for detecting torque data of the electric drive assembly;

The temperature sensor is connected with the electric drive assembly and is used to detect the temperature of the electric drive assembly.

According to the above technical means, the torque data and operating temperature of the electric drive components can be detected, providing a data basis for analyzing the operating performance of the electric drive components.

Further, the test device for the electric drive system further includes a cooling system, which is used to deliver cooling fluid to the electric drive assembly.

According to the above technical means, the motor of the electric drive assembly can be pre-cooled to the normal working temperature by the cooling system.

The present invention also provides a test method for the electric drive system, including:

The simulated load of the dynamometer is set by the dynamometer controller based on the target working condition, wherein the dynamometer controller and the dynamometer are arranged on a test bench, and the dynamometer controller and the dynamometer are arranged on a test bench. The dynamometer is connected;

setting the motor drive data of the electric drive assembly based on the target working condition through a motor controller, wherein the motor controller is arranged on the test bench;

Using the motor controller to control the electric drive assembly to perform a working condition test under the simulated load based on the motor drive data, wherein the simulated load is the load applied by the dynamometer to the electric drive assembly;

The operation data of the electric drive assembly is collected during the working condition test through a detection sensor, wherein the detection sensor is connected with the electric drive assembly.

According to the above technical means, by configuring the load and motor drive data of the target working condition for the electric drive components, the performance test of the electric drive system under the target working condition can be carried out, and the operating data during the test can be obtained to support the analysis. This test method reduces the test cost and improves the test efficiency.

Further, the target operating condition is set as the vehicle accelerates from an initial vehicle speed to a plurality of preset vehicle speed thresholds under a road condition with a preset slope.

According to the above-mentioned technical means, based on the test requirements, the operating performance of the electric drive system under the road condition with a set slope can be tested.

An electronic device comprising:

one or more processors;

The storage device is used to store one or more programs, and when the one or more programs are executed by the one or more processors, the electronic equipment implements the above-mentioned testing method of the electric drive system.

A computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor of a computer, the computer is made to execute the above-mentioned testing method of an electric drive system.

The beneficial effect of the present invention: the present invention is aimed at the performance test of the electric drive system, which can effectively reduce the test cost and improve the test efficiency.

Description of drawings

FIG. 1 is a structural block diagram of a testing device for an electric drive system of the present invention.

Fig. 2 is a connection structure block diagram of the cooling system of the present invention.

Fig. 3 is a block diagram of the connection structure of the high-voltage DC power supply of the present invention.

FIG. 4 is a schematic flow chart of the testing method of the electric drive system of the present invention.

FIG. 5 is a schematic structural diagram of the computer system of the electronic device of the present invention.

Detailed ways

Embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.

It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual implementation, and the component layout type may also be more complicated.

First of all, it should be explained that the electric drive system is the power output unit of the electric vehicle, which may include a motor, a motor controller, and a transmission assembly. Before the motor drive system is installed in the vehicle application, it needs to be tested to analyze the system performance.

In the actual performance test of the electric drive system, there are problems of high test cost and low test efficiency. The test device of the electric drive system of the present invention can set the motor drive data of the electric drive system based on the target working condition, and use the dynamometer to simulate the load of the electric drive system under the target working condition. Furthermore, the test device can operate the electric drive system on the test bench based on the load and motor drive data under the target working condition, so as to obtain the operating data under the target working condition, which provides effective data for performance analysis. When testing the performance of the electric drive system under the target working condition, the test device can test the performance of the electric drive system under the target working condition only through simple test components and configure the load and motor drive data matching the working condition, reducing the Reduce the test cost and improve the test efficiency.

Please refer to FIG. 1 , which is a block diagram of a testing device for an electric drive system shown in an exemplary embodiment of the present application. The test device can be applied to the performance test of the drive system of the electric vehicle, and can also be applied to the performance test of the drive system of the hybrid vehicle. This embodiment does not limit the implementation environment to which the device is applicable. The test device of the exemplary electric drive system may include a motor controller 20 on a test bench 10 , a dynamometer 30 , a dynamometer controller 40 and a detection sensor 50 . Wherein, the testing device as a whole can be installed on the test bench 10 for performance testing. The electric drive system may include a motor controller 20 and an electric drive assembly 60. The motor controller 20 may configure the motor drive data of the electric drive assembly 60 based on the target working condition, and control the operation of the electric drive assembly 60 based on the motor drive data. Dynamometer 30 may apply a simulated load to electric drive assembly 60 . The dynamometer controller 40 may configure simulated loads on the dynamometer based on target operating conditions. When the test device detects, the motor controller 20 can control the electric drive assembly 60 to perform a working condition test under a simulated load based on the motor drive data corresponding to the target working condition. Further, the detection sensor 50 can collect the electric drive assembly 60 for working conditions. The operating data during the condition test can provide a data basis for the performance analysis of the electric drive system.

Please refer to FIG. 1 , in one embodiment of the present invention, the test bench 10 can provide installation space for a motor controller 20 , a dynamometer 30 , a dynamometer controller 40 , a detection sensor 50 or other components. Each component can be connected to the test bench 10 by any connecting piece, and the type of the connecting piece is not limited here, and can be a connecting seat, a bolt, or other connecting pieces.

Please refer to FIG. 1 and FIG. 3 , in an embodiment of the present invention, the motor controller 20 may be connected to the electric drive assembly 60 to control the motor drive data of the electric drive assembly 60 . Specifically, in order to accurately test the performance of the electric drive system under the target working condition, a vehicle B having the same mass as the vehicle A corresponding to the electric drive assembly 60 can be predetermined, and after the actual test of the vehicle B under the target working condition, Motor speed data and motor torque data of the electric drive system of vehicle B during the test process can be obtained. Because the motor drive data of the same quality vehicle is the same under the same working condition, the motor speed data and the motor torque data can be used as the test speed data and the test torque data to form the motor drive data, and applied to the simulated working condition test of the electric drive assembly 60 middle. This motor drive data is obtained by testing the actual vehicle under actual working conditions, which is more accurate. Therefore, when the motor controller 20 uses the motor driving data to control the electric drive assembly 60 to perform the test, the test result will be more accurate. It should be noted that the motor controller 20 can be connected to a high voltage DC power supply 70, and the high voltage DC power supply 70 can input a rated working voltage.

It should be noted that the target working condition can be set based on the test requirements. For example, when the climbing performance of the electric drive system needs to be tested, the target working condition can be set as the climbing condition, and the climbing condition can be specifically set as Accelerating from the initial vehicle speed to multiple preset vehicle speed thresholds under the road conditions with a preset slope. Specifically, the plurality of preset vehicle speed thresholds can be divided into a first vehicle speed threshold, a second vehicle speed threshold, a third vehicle speed threshold and a fourth vehicle speed threshold. When the first vehicle speed threshold is set to 10km/h and the initial vehicle speed is set to 0km/h, then the target operating condition is that the vehicle accelerates from 0km/h to 10km/h on a road with a preset slope. When the second vehicle speed threshold is set to 20km/h and the initial vehicle speed is set to 0km/h, the target working condition is that the vehicle accelerates from 0km/h to 20km/h on a road condition with a preset slope. When the third vehicle speed threshold is set to 30km/h and the initial vehicle speed is set to 0km/h, the target working condition is that the vehicle accelerates from 0km/h to 30km/h on a road condition with a preset slope. When the fourth vehicle speed threshold is set to 40km/h and the initial vehicle speed is set to 0km/h, the target working condition is that the vehicle accelerates from 0km/h to 40km/h on a road condition with a preset slope.

In an embodiment of the present invention, the dynamometer controller 40 can set the load to be applied by the dynamometer 30 to the electric drive assembly 60 based on the target working condition. Specifically, when the target working condition is set as the climbing condition, the dynamometer controller 40 can pre-configure the load corresponding to the working condition based on the specific data of the climbing condition, for example, according to the road load under the climbing condition The resistance parameters, vehicle mass, and communication files between the various detection components in the test device are used to configure the load corresponding to the climbing condition.

Please refer to FIG. 1 , in one embodiment of the present invention, the detection sensor 50 can detect the operation data of the electric drive assembly 60 in the working condition test. Specifically, when testing the electric drive system under the target working condition, the motor controller 20 can control the electric drive assembly 60 to start running the test based on the motor driving data corresponding to the target working condition, such as test speed data and test torque data. At the same time, the dynamometer controller 40 can control the dynamometer 30 to apply a load corresponding to the target working condition to the electric drive assembly 60, so that the working condition test can start. During the testing process, the detection sensor 50 can detect operating data to provide a data basis for performance analysis. It should be noted that the detection sensor 50 may include a torque sensor 51 and a temperature sensor 52 , and the torque sensor 51 may be connected between the electric drive assembly 60 and the dynamometer 30 to detect torque data of the electric drive assembly 60 . The temperature sensor 52 may be connected to the electric drive assembly to detect the operating temperature of the electric drive assembly 60 . The installation position of the temperature sensor 52 is not limited, it can be installed in the motor casing of the electric drive assembly 60, can also be installed on the surface of the motor casing of the electric drive assembly 60, and can also be installed on other motors that can measure the electric drive assembly 60 temperature location. It is worth mentioning that the data of the temperature sensor 52 can be transmitted to the motor controller 20, and the motor controller 20 can preset a temperature protection threshold, such as 80 degrees, 75 degrees or other temperatures. When the data of the temperature sensor 52 is higher than the temperature protection threshold, the motor controller 20 may give a temperature prompt.

In an embodiment of the present invention, the specific process of the working condition test may be to perform multiple start-stop operations and record the operation data in each start-stop operation. For example, on a preset slope, the motor controller 20 is used to control the electric drive assembly 60 to operate with the test speed data and test torque data corresponding to the current working condition, and at the same time, the dynamometer 30 applies a load to the electric drive assembly 60, until the vehicle speed reaches the first vehicle speed threshold, such as 10km/h. During this process, the operating data of the electric drive assembly 60 is recorded by the detection sensor 50 . Next, operation of the electric drive assembly 60 may be deactivated. After a certain time interval, for example, 5 seconds, the test can be performed again until the vehicle speed reaches the second vehicle speed threshold, for example, 20 km/h, and the running data can be recorded. In this way, multiple start and stop operations can be performed to complete the working condition test. It is worth noting that during the process of working condition detection, if the electric drive system cannot be started, the vehicle speed cannot reach the target speed, or the electric drive is interrupted, it indicates that there is a problem with the electric drive system. Under normal conditions, the electric drive system can start normally and reach the target vehicle speed.

In an embodiment of the present invention, it should be noted that, before the working condition test, the motor controller 20 can control the electric drive assembly 60 to run for preheating, so that after the electric drive assembly 60 reaches the normal operating temperature, it can start Perform multiple start and stop operations. The preheating process is not limited, for example, the motor controller 20 may control the electric drive assembly 60 to operate with the test rotational speed data and test torque data, so as to reach the normal working temperature.

Referring to FIG. 2 , it should be noted that the test device may further include a cooling system 80 that can deliver cooling fluid to the electric drive assembly 60 . Before starting each start-stop operation, the motor of the electric drive assembly 60 can be pre-cooled to a normal operating temperature by the cooling system 80 , for example, the normal operating temperature is greater than or equal to 5 degrees and less than or equal to 60 degrees.

See also shown in Fig. 4, the present invention provides a kind of test method of electric drive system, can be applied in the drive system performance test of electric vehicle, also can be applicable in the drive system performance test of hybrid vehicle, to improve drive system The test efficiency can be improved, and the test cost can be reduced at the same time. This embodiment does not limit the implementation environment to which the method is applicable. The test method for electric drive system may include the following steps:

Step S410: Set the simulated load of the dynamometer based on the target working condition through the dynamometer controller, wherein the dynamometer controller and the dynamometer are set on a test bench, and the dynamometer The controller is connected with the dynamometer;

Step S420: Set the motor drive data of the electric drive component based on the target working condition through the motor controller, wherein the motor controller is set on the test bench;

Step S430: Using the motor controller to control the electric drive assembly to perform a working condition test under the simulated load based on the motor drive data, wherein the simulated load is applied by the dynamometer to the electric drive assembly load;

Step S440: Collecting the operation data of the electric drive assembly in the working condition test through the detection sensor, wherein the detection sensor is connected to the electric drive assembly.

In one embodiment of the present invention, when step S410 is executed, the simulated load of the dynamometer is set by the dynamometer controller based on the target working condition. Specifically, the dynamometer controller 40 can set the load to be applied by the dynamometer 30 to the electric drive assembly 60 based on the target working condition. Specifically, the target working condition can be set based on the test requirements. When the target working condition is set as the climbing condition, the dynamometer controller 40 can pre-configure the load corresponding to the working condition based on the specific data of the climbing condition. For example, the load corresponding to the climbing condition is configured according to the road resistance parameters under the climbing condition, the mass of the vehicle, and the communication files between the various detection components in the test device. Further, when the target working condition is a climbing working condition, the working condition may be specifically set as the vehicle accelerates from an initial vehicle speed to a plurality of preset vehicle speed thresholds under a road condition with a preset slope. Specifically, the plurality of preset vehicle speed thresholds can be divided into a first vehicle speed threshold, a second vehicle speed threshold, a third vehicle speed threshold and a fourth vehicle speed threshold. When the first vehicle speed threshold is set to 10km/h and the initial vehicle speed is set to 0km/h, then the target operating condition is that the vehicle accelerates from 0km/h to 10km/h on a road with a preset slope. When the second vehicle speed threshold is set to 20km/h and the initial vehicle speed is set to 0km/h, the target working condition is that the vehicle accelerates from 0km/h to 20km/h on a road condition with a preset slope. When the third vehicle speed threshold is set to 30km/h and the initial vehicle speed is set to 0km/h, the target working condition is that the vehicle accelerates from 0km/h to 30km/h on a road condition with a preset slope. When the fourth vehicle speed threshold is set to 40km/h and the initial vehicle speed is set to 0km/h, the target working condition is that the vehicle accelerates from 0km/h to 40km/h on a road condition with a preset slope.

In one embodiment of the present invention, when step S420 is executed, the motor controller sets the motor drive data of the electric drive assembly based on the target working condition. Specifically, the motor controller 20 may be connected to the electric drive assembly 60 so as to control the motor drive data of the electric drive assembly 60 . It should be noted that, in order to accurately test the performance of the electric drive system under the target working condition, a vehicle B having the same mass as the vehicle A corresponding to the electric drive assembly 60 can be determined in advance, and the vehicle B is actually tested under the target working condition Finally, the motor speed data and motor torque data of the electric drive system of vehicle B during the test process can be obtained. Because the motor drive data of the same quality vehicle is the same under the same working condition, the motor speed data and the motor torque data can be used as the test speed data and the test torque data to form the motor drive data, and applied to the simulated working condition test of the electric drive assembly 60 middle. This motor drive data is obtained by testing the actual vehicle under actual working conditions, which is more accurate. Therefore, when the motor controller 20 uses the motor driving data to control the electric drive assembly 60 to perform the test, the test result will be more accurate.

In one embodiment of the present invention, when step S430 is executed, the motor controller controls the electric drive assembly to perform a working condition test under the simulated load based on the motor drive data, wherein the simulated load is The load applied by the dynamometer to the electric drive assembly. Specifically, the specific process of the working condition test may be to perform multiple start-stop operations and record the operation data in each start-stop operation. For example, on a preset slope, the motor controller 20 is used to control the electric drive assembly 60 to run with the motor drive data corresponding to the current working condition, and at the same time, the dynamometer 30 applies a simulated load to the electric drive assembly 60 until the vehicle speed reaches The first vehicle speed threshold, for example, 10km/h. Next, operation of the electric drive assembly 60 may be deactivated. After a certain time interval, for example, 5 seconds, the test can be performed again until the vehicle speed reaches the second vehicle speed threshold, for example, 20 km/h. In this way, multiple start and stop operations can be performed to complete the working condition test. It is worth noting that during the process of working condition detection, if the electric drive system cannot be started, the vehicle speed cannot reach the target speed, or the electric drive is interrupted, it indicates that there is a problem with the electric drive system. Under normal conditions, the electric drive system can start normally and reach the target vehicle speed.

It should be noted that, before the working condition test, the motor controller 20 can control the operation of the electric drive assembly 60 so that the electric drive assembly 60 can start and stop multiple times after reaching the normal working temperature. The preset process is not limited. For example, the motor controller 20 can be used to control the electric drive assembly 60 to operate with the test speed data and test torque data corresponding to the target working condition, and perform multiple cycles until the electric drive assembly 60 to normal operating temperature. Further, before starting each start-stop operation, the motor of the electric drive assembly 60 can be pre-cooled to a normal operating temperature by the cooling system 80 , for example, the normal operating temperature is greater than or equal to 5 degrees and less than or equal to 60 degrees.

In one embodiment of the present invention, when step S440 is executed, the operation data of the electric drive assembly is collected during the working condition test through a detection sensor, wherein the detection sensor is connected to the electric drive assembly. Specifically, the detection sensor 50 can detect the operation data of the electric drive assembly 60 in the working condition test. Specifically, during the working condition test, the detection sensor 50 can detect the operation data of the electric drive assembly 60 to provide a data basis for performance analysis. It should be noted that the detection sensor 50 may include a torque sensor 51 and a temperature sensor 52 , and the torque sensor 51 may be connected between the electric drive assembly 60 and the dynamometer 30 to detect torque data of the electric drive assembly 60 . The temperature sensor 52 may be connected to the electric drive assembly to detect the operating temperature of the electric drive assembly 60 . The installation position of the temperature sensor 52 is not limited, it can be installed in the motor casing of the electric drive assembly 60, can also be installed on the surface of the motor casing of the electric drive assembly 60, and can also be installed on other motors that can measure the electric drive assembly 60 temperature location. It is worth mentioning that the data of the temperature sensor 52 can be transmitted to the motor controller 20, and the motor controller 20 can preset a temperature protection threshold, such as 80 degrees, 75 degrees or other temperatures. When the data of the temperature sensor 52 is higher than the temperature protection threshold, the motor controller 20 may give a temperature prompt.

It can be seen that in the above scheme, firstly, the motor drive data of the electric drive system is set based on the target working condition, and a dynamometer is used to simulate the load of the electric drive system under the target working condition. Furthermore, the electric drive system can be operated based on the load and motor drive data under the target working condition, so as to obtain the operating data under the target working condition, which provides effective data for performance analysis. When testing the performance of the electric drive system under the target working condition, the above scheme can test the performance of the electric drive system under the target working condition only through simple test components and configure the load and motor drive data matching the working condition, reducing the Test cost, and improve test efficiency.

The embodiment of the present application also provides an electronic device, including: one or more processors; a storage device for storing one or more programs, when the one or more programs are processed by the one or more When executed by the controller, the electronic device can realize the testing method of the electric drive system provided in the above-mentioned various embodiments.

Fig. 5 shows a schematic structural diagram of a computer system suitable for implementing the electronic device of the embodiment of the present application. It should be noted that the computer system of the electronic device shown in FIG. 5 is only an example, and should not limit the functions and scope of use of this embodiment of the present application.

As shown in Figure 5, the computer system includes a central processing unit (Central Processing Unit, CPU) 501, which can be stored in a program in a read-only memory (Read-OnlyMemory, ROM) 502 or loaded into a random access memory (RandomAccessMemory) from a storage part 508 , the program in RAM) 503 to perform various appropriate actions and processes, for example, to perform the test method of the electric drive system described in the above-mentioned embodiments. In RAM 503, various programs and data necessary for system operation are also stored. The CPU 501 , ROM 502 , and RAM 503 are connected to each other via a bus 504 . An input/output (Input/Output, I/O) interface 505 is also connected to the bus 504 .

The following components are connected to the I/O interface 505: an input section 506 including a keyboard, a mouse, etc.; an output section 507 including a cathode ray tube (Cathode RayTube, CRT), a liquid crystal display (LiquidCrystalDisplay, LCD) etc., and a loudspeaker; including a hard disk and a communication section 509 including a network interface card such as a LAN (LocalAreaNetwork, local area network) card, a modem, or the like. The communication section 509 performs communication processing via a network such as the Internet. A drive 510 is also connected to the I/O interface 505 as needed. A removable medium 511, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is mounted on the drive 510 as necessary so that a computer program read therefrom is installed into the storage section 508 as necessary.

In particular, according to the embodiments of the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments of the present application include a computer program product, which includes a computer program carried on a computer-readable medium, where the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program may be downloaded and installed from a network via communication portion 509 and/or installed from removable media 511 . When this computer program is executed by a central processing unit (CPU) 501, various functions defined in the system of the present application are performed.

It should be noted that the computer-readable medium shown in the embodiment of the present application may be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium may be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to, electrical connections with one or more wires, portable computer diskettes, hard disks, random access memory (RAM), read-only memory (ROM), erasable Programmable Read-Only Memory (Erasable Programmable Read-Only Memory, EPROM), flash memory, optical fiber, portable compact disk read-only memory (Compact Disc Read-Only Memory, CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above. In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying a computer-readable computer program thereon. Such propagated data signals may take many forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device. . A computer program embodied on a computer readable medium can be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

The flowchart and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. Wherein, each block in the flowchart or block diagram may represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or part of the code includes one or more executable instruction. It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. It should also be noted that each block in the block diagrams or flowchart illustrations, and combinations of blocks in the block diagrams or flowchart illustrations, can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a A combination of dedicated hardware and computer instructions.

The units described in the embodiments of the present application may be implemented by software or by hardware, and the described units may also be set in a processor. Wherein, the names of these units do not constitute a limitation of the unit itself under certain circumstances.

Another aspect of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor of a computer, the computer is made to execute the test method for an electric drive system as described above. The computer-readable storage medium may be included in the electronic device described in the above embodiments, or may exist independently without being assembled into the electronic device.

Another aspect of the present application also provides a computer program product or computer program, the computer program product or computer program comprising computer instructions stored in a computer-readable storage medium. The processor of the computer device reads the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the computer device executes the testing method of the electric drive system provided in the above-mentioned embodiments.

The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims (10)

1. The test device of the electric drive system is characterized by comprising:

the dynamometer is arranged on the test bed and connected with the electric driving assembly, and is used for applying a simulated load to the electric driving assembly;

the dynamometer controller is arranged on the test bed and connected with the dynamometer, and is used for setting the simulated load of the dynamometer based on a target working condition;

the motor controller is arranged on the test bed and connected with the electric driving assembly, and is used for controlling the electric driving assembly to perform working condition test under the simulated load based on motor driving data corresponding to the target working condition; and

and the detection sensor is connected with the electric driving assembly and used for collecting the operation data of the electric driving assembly in the working condition test.

2. The test device for an electric drive system according to claim 1, wherein: the target operating condition is set to accelerate the vehicle from an initial vehicle speed to a plurality of preset vehicle speed thresholds under road conditions of a preset gradient.

3. The test device for an electric drive system according to claim 1, wherein: the motor driving data are obtained by actually testing the mass vehicle corresponding to the electric driving assembly in the target working condition, wherein the motor driving data comprise test rotating speed data and test torque data.

4. The test device for an electric drive system according to claim 1, wherein: before the motor controller controls the electric driving assembly to perform working condition test, the motor controller is further used for controlling the electric driving assembly to operate so that the electric driving assembly reaches a preset working temperature.

5. The test device for an electric drive system according to claim 1, wherein: the detection sensor includes:

the torque sensor is arranged between the electric driving assembly and the dynamometer and used for detecting torque data of the electric driving assembly;

and the temperature sensor is connected with the electric driving assembly and used for detecting temperature data of the electric driving assembly.

6. The test device for an electric drive system according to claim 1, wherein: a cooling system is also included to deliver cooling fluid to the electric drive assembly.

7. The test method of the electric drive system is characterized by comprising the following steps:

setting a simulated load of a dynamometer based on a target working condition through a dynamometer controller, wherein the dynamometer controller and the dynamometer are arranged on a test bed, and the dynamometer controller is connected with the dynamometer;

setting motor driving data of an electric driving assembly based on the target working condition through a motor controller, wherein the motor controller is arranged on the test bed;

controlling the electric drive assembly to perform working condition test under the simulated load based on the motor drive data through the motor controller, wherein the simulated load is a load applied to the electric drive assembly by the dynamometer;

and acquiring operation data of the electric drive assembly in the working condition test through a detection sensor, wherein the detection sensor is connected with the electric drive assembly.

8. The method of testing an electric drive system of claim 7, wherein: the target operating condition is set to accelerate the vehicle from an initial vehicle speed to a plurality of preset vehicle speed thresholds under road conditions of a preset gradient.

9. An electronic device, the electronic device comprising:

one or more processors;

storage means for storing one or more programs that, when executed by the one or more processors, cause the electronic device to implement the method of testing an electric drive system according to any one of claims 7 to 8.

10. A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor of a computer, causes the computer to perform the method of testing an electric drive system according to any one of claims 7 to 8.

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