Harmonic current injection test method and device based on order noise level

Abstract

The invention relates to the technical field of vehicles, in particular to a harmonic current injection test method and device based on an order noise level, and the method comprises the steps: judging whether a to-be-tested vehicle meets a preset test condition or not; if the to-be-tested vehicle meets the preset test conditions, determining a plurality of motor test rotating speeds and a plurality of motor test torques, and further determining a plurality of test working conditions; performing harmonic current injection on the motor of the to-be-tested vehicle under each test working condition, acquiring noise data of at least one position of the to-be-tested vehicle, and obtaining a current map of each test working condition according to the noise data of the at least one position and the plurality of test working conditions. Therefore, the problems that strategies of related technologies belong to indirect optimization of motor noise, are mainly simulated and assisted by test verification and cannot be directly applied to current harmonic injection of the motor are solved, the current harmonic injection test method is defined, and the motor order noise is optimized from the source.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a method and apparatus for testing harmonic current injection based on order noise level. Background Technology

[0002] In related technologies, there are several strategies for injecting harmonic current into motors: (1) simply suppressing the magnitude of harmonic current; (2) aiming to optimize the torque fluctuation of the motor; and (3) aiming to optimize the magnitude of spatial electromagnetic force.

[0003] However, since the factors affecting motor noise are complex and varied, and the three strategies of the relevant technologies are all indirect optimization of motor noise, and rely mainly on simulation with experimental verification as a supplement, they cannot be directly applied to the current harmonic injection of motors, which urgently needs to be solved. Summary of the Invention

[0004] This application provides a harmonic current injection test method and apparatus based on order noise level to address the problem that related technologies all rely on indirect optimization of motor noise, primarily through simulation and supplemented by experimental verification, and cannot be directly applied to the problem of motor current harmonic injection. This application clarifies the current harmonic injection test method to optimize motor order noise from the source.

[0005] The first aspect of this application provides a method for harmonic current injection testing based on order noise level, including the following steps: Determine whether the vehicle under test meets the preset test conditions; If the vehicle to be tested meets the preset test conditions, then multiple motor test speeds and multiple motor test torques are determined, and multiple test conditions are determined based on the multiple motor test speeds and multiple motor test torques. Harmonic current is injected into the motor of the vehicle under test under each test condition, and noise data is collected at at least one location of the vehicle under test. Based on the noise data at at least one location and multiple test conditions, a current map is obtained for each test condition.

[0006] Optionally, in some embodiments, multiple motor test speeds and multiple motor test torques are determined, and multiple test conditions are determined based on the multiple motor test speeds and multiple motor test torques, including: Determine the initial test speed and the final test speed, and based on a preset interval, obtain multiple motor test speeds according to the initial test speed and the final test speed; Multiple test conditions are obtained by combining the test speed and test torque of each motor.

[0007] Optionally, in some embodiments, a current map for each test condition is obtained based on noise data from at least one location and multiple test conditions, including: Based on each test condition, the noise data at at least one location under the corresponding test condition is analyzed to obtain the optimal harmonic current parameters for each test condition. The current map for each test condition is obtained based on the optimal harmonic current parameters for each test condition.

[0008] Optionally, in some embodiments, determining whether the vehicle under test meets preset test conditions includes: Obtain the current speed of the vehicle under test; Determine whether the current vehicle speed meets the preset stability conditions; If the current vehicle speed meets the preset stability conditions, then the vehicle under test is determined to meet the preset test conditions.

[0009] Optionally, in some embodiments, before determining whether the vehicle under test meets the preset test conditions, the method further includes: Identify whether the vehicle under test is in a full-vehicle rotating semi-anechoic chamber test chamber; If the vehicle to be tested is not in the full vehicle oscillating semi-anechoic chamber test chamber, then adjust the vehicle to be tested to be in the full vehicle oscillating semi-anechoic chamber test chamber.

[0010] A second aspect of this application provides a harmonic current injection test apparatus based on order noise level, comprising: The judgment module is used to determine whether the vehicle under test meets the preset test conditions; The determination module is used to determine multiple motor test speeds and multiple motor test torques when the vehicle under test meets the preset test conditions, and to determine multiple test conditions based on the multiple motor test speeds and multiple motor test torques. The test module is used to inject harmonic current into the motor of the vehicle under test under each test condition, collect noise data at at least one location of the vehicle under test, and obtain a current map for each test condition based on the noise data at at least one location and multiple test conditions.

[0011] Optionally, in some embodiments, the determining module is further configured to: Determine the initial test speed and the final test speed, and based on a preset interval, obtain multiple motor test speeds according to the initial test speed and the final test speed; Multiple test conditions are obtained by combining the test speed and test torque of each motor.

[0012] Optionally, in some embodiments, the test module is specifically used for: Based on each test condition, the noise data at at least one location under the corresponding test condition is analyzed to obtain the optimal harmonic current parameters for each test condition. The current map for each test condition is obtained based on the optimal harmonic current parameters for each test condition.

[0013] Optionally, in some embodiments, the determination module is specifically used for: Obtain the current speed of the vehicle under test; Determine whether the current vehicle speed meets the preset stability conditions; If the current vehicle speed meets the preset stability conditions, then the vehicle under test is determined to meet the preset test conditions.

[0014] Optionally, in some embodiments, before determining whether the vehicle under test meets the preset test conditions, the determination module is further configured to: Identify whether the vehicle under test is in a full-vehicle rotating semi-anechoic chamber test chamber; If the vehicle to be tested is not in the full vehicle oscillating semi-anechoic chamber test chamber, then adjust the vehicle to be tested to be in the full vehicle oscillating semi-anechoic chamber test chamber.

[0015] A third aspect of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. The processor executes the program to implement the harmonic current injection test method based on order noise level described in the first aspect embodiment.

[0016] A fourth aspect of this application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the harmonic current injection test method based on order noise level described in the first aspect embodiment.

[0017] The harmonic current injection test method based on order noise level in this application has at least the following innovative points and beneficial effects: (1) The embodiments of this application inject harmonic current with the motor order noise in the vehicle as the target, so as to ensure that the motor order noise is optimal at each speed. The method is clear and the target is well-defined.

[0018] (2) The embodiments of this application are carried out in the semi-anechoic chamber of the vehicle hub, realizing the combination of different motor speeds and different loads on the vehicle. At the same time, the influence of environmental factors is eliminated in the semi-anechoic chamber environment, making the test results more accurate.

[0019] (3) The embodiment of this application optimizes motor noise on the whole vehicle, and the optimization scheme can be directly programmed into the whole vehicle control program.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart of a harmonic current injection test method based on order noise level according to an embodiment of this application; Figure 2 This is a block diagram of a harmonic current injection test device based on order noise level according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application. Detailed Implementation

[0022] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0023] The following description, with reference to the accompanying drawings, illustrates a harmonic current injection test method and apparatus based on order noise level according to an embodiment of this application. Addressing the issue that the strategies of related technologies mentioned in the background are all indirect optimizations of motor noise, relying primarily on simulation with supplementary experimental verification, and cannot be directly applied to harmonic current injection in motors, this application provides a harmonic current injection test method based on order noise level. In this method, it is first determined whether the vehicle under test meets preset test conditions; if so, multiple motor test speeds, torques, and corresponding test conditions are determined; under each test condition, harmonic current is injected into the motor of the vehicle under test, and noise data is collected at at least one location of the vehicle under test. Finally, the noise data and test conditions are combined to obtain a current map for each test condition. This solves the problem that the strategies of related technologies are all indirect optimizations of motor noise, relying primarily on simulation with supplementary experimental verification, and cannot be directly applied to harmonic current injection in motors. It clarifies the harmonic current injection test method, optimizing motor order noise from the source.

[0024] Specifically, Figure 1 A flowchart of a harmonic current injection test method based on order noise level provided in an embodiment of this application.

[0025] like Figure 1 As shown, this harmonic current injection test method based on order noise level includes the following steps: In step S101, it is determined whether the vehicle to be tested meets the preset test conditions.

[0026] The vehicle to be tested refers to the complete vehicle that needs to undergo harmonic current injection testing to solve the problem of low-speed motor order noise; the preset test conditions refer to the prerequisite requirements for carrying out harmonic current injection testing.

[0027] Optionally, in some embodiments, before determining whether the vehicle under test meets the preset test conditions, the method further includes: identifying whether the vehicle under test is in a full-vehicle rotating semi-anechoic chamber test chamber; if the vehicle under test is not in a full-vehicle rotating semi-anechoic chamber test chamber, then adjusting the vehicle under test to be in a full-vehicle rotating semi-anechoic chamber test chamber.

[0028] Among them, the whole vehicle rotating hub semi-anechoic chamber test laboratory refers to a special laboratory that integrates a rotating hub system and a semi-anechoic environment, which can fix the vehicle, simulate driving conditions and isolate external noise interference.

[0029] Specifically, in this embodiment of the application, an infrared sensor or a radio frequency identification (RFID) positioning device can be installed at the entrance of the laboratory to determine whether the vehicle under test is already in the semi-anechoic chamber of the vehicle rotating hub. If the vehicle under test is not in the semi-anechoic chamber of the vehicle rotating hub, this embodiment of the application will use an automatic traction device to move the vehicle to a designated area in the test chamber, and the alignment and calibration mechanism of the rotating hub system will adjust the relative position of the vehicle's drive wheels and the rotating hub and complete the fixing.

[0030] Optionally, in some embodiments, determining whether the vehicle under test meets the preset test conditions includes: obtaining the current speed of the vehicle under test; determining whether the current speed meets the preset stability conditions; if the current speed meets the preset stability conditions, then determining that the vehicle under test meets the preset test conditions.

[0031] The current vehicle speed refers to the actual speed of the vehicle under test at the time of testing; the preset stable condition refers to the state in which the current vehicle speed and the set speed corresponding to the target speed of the motor are consistent and without significant fluctuations.

[0032] Specifically, in this embodiment, a vehicle speed sensor installed on the vehicle or swivel system can collect the current vehicle speed data of the vehicle under test in real time, and transmit the collected speed data to a data processing module. The data processing module determines whether the current vehicle speed is under preset stable conditions. If the current vehicle speed meets the preset stable conditions, this embodiment determines that the vehicle under test meets the preset test conditions; if the current vehicle speed does not meet the preset stable conditions, this embodiment determines that the vehicle under test does not meet the preset test conditions. The stable vehicle speed state refers to the state where the motor is fixed at different speeds and different torques are applied to the motor.

[0033] In step S102, if the vehicle to be tested meets the preset test conditions, multiple motor test speeds and multiple motor test torques are determined, and multiple test conditions are determined based on the multiple motor test speeds and multiple motor test torques.

[0034] Among them, the motor test speed refers to multiple fixed speed values ​​set at preset intervals, covering the range of motor use; the motor test torque refers to multiple torque values ​​set according to different load ratios for each test speed; and the test condition refers to the steady-state test conditions formed by the combination of the motor test speed and the corresponding motor test torque.

[0035] Specifically, in this embodiment, the vehicle can be driven by a rotating hub to bring the motor to the minimum target speed of 1000 r / min, while applying 10% load torque to the motor to form the first test condition. Then, the motor speed is gradually increased at preset intervals, and different proportions of load torque are set accordingly to form multiple test conditions in sequence, ensuring that the commonly used speed and torque range of the motor is covered.

[0036] Optionally, in some embodiments, multiple motor test speeds and multiple motor test torques are determined, and multiple test conditions are determined based on the multiple motor test speeds and multiple motor test torques, including: determining an initial test speed and a final test speed, and obtaining multiple motor test speeds based on a preset interval; and obtaining multiple test conditions based on a combination of each motor test speed and each motor test torque.

[0037] The initial test speed refers to the minimum test speed reference value of the motor set in the test; the final test speed refers to the maximum test speed reference value of the motor set in the test; and the preset interval refers to the fixed difference between the test speeds of two adjacent motors.

[0038] Specifically, under the premise that the vehicle under test meets the preset test conditions, the embodiments of this application can first determine the initial test speed as 1000 r / min and the final test speed as 3800 r / min, set the preset interval as 200 r / min, and generate all motor test speeds of 1000 r / min, 1200 r / min, 1400 r / min...3800 r / min by successively adding the interval from the initial test speed; at the same time, determine five motor test load torques of 10%, 20%, 30%, 40%, and 50%, and then combine each generated motor test speed with these five motor test torques one by one to form 75 independent test conditions.

[0039] In step S103, harmonic current is injected into the motor of the vehicle under test under each test condition, and noise data at at least one location of the vehicle under test is collected. Based on the noise data at at least one location and multiple test conditions, a current map for each test condition is obtained.

[0040] Among them, the noise data is acoustic signal data used to reflect the order noise intensity and characteristics of the motor; the current map for each test condition is a visual chart used to present the relationship between current parameters and noise performance.

[0041] Specifically, in this embodiment, the vehicle to be tested can first be fixed in a semi-anechoic chamber of the vehicle's rotating hub. A microphone is installed at the right ear of the driver inside the vehicle and connected to a noise testing and analysis device. At the same time, the connection of the harmonic current injection related equipment is completed. Then, harmonic current injection is performed at each steady-state operating point (i.e., test operating condition). The changes in motor order noise are observed through the noise testing and analysis device. The current harmonic injection parameters corresponding to the optimal motor order noise are found and recorded, thereby completing the harmonic current injection test of the test operating condition. Finally, by covering multiple operating conditions of the motor, a calibration map containing various operating condition parameters is formed, thereby solving the problem of motor order noise when the vehicle is driving at low speed.

[0042] Optionally, in some embodiments, obtaining a current map for each test condition based on noise data at at least one location and multiple test conditions includes: analyzing noise data at at least one location under each test condition to obtain the optimal harmonic current parameter for each test condition; and obtaining a current map for each test condition based on the optimal harmonic current parameter for each test condition.

[0043] Among them, the optimal harmonic current parameters refer to the key parameters such as harmonic current frequency and amplitude that enable the collected noise data to reach the lowest or optimal state.

[0044] Specifically, in this embodiment of the application, for each test condition, the noise data collected at a specified location can be analyzed for characteristics such as amplitude and frequency using a noise testing and analysis device. The combination of harmonic current frequency and amplitude parameters that minimizes the motor order noise can be selected as the optimal harmonic current parameters for that test condition. Then, the optimal harmonic current parameters for each test condition are entered into a chart generation system according to preset coordinate rules, and the optimal harmonic current parameters for each test condition are automatically generated to obtain a current map for each test condition.

[0045] The harmonic current injection test method based on order noise level proposed in this application first determines whether the vehicle under test meets the preset test conditions. If so, it determines the test speed, torque, and corresponding test conditions for multiple motors. Under each test condition, harmonic current is injected into the motor of the vehicle under test, and noise data is collected at at least one location of the vehicle. Finally, the noise data and test conditions are combined to obtain the current map for each test condition. This solves the problem that related technologies rely primarily on indirect optimization of motor noise, with simulation as the main method and experimental verification as a supplement, and cannot be directly applied to harmonic current injection in motors. It clarifies the harmonic current injection test method, optimizing motor order noise from the source.

[0046] Next, the harmonic current injection test apparatus based on order noise level proposed in the embodiments of this application is described with reference to the accompanying drawings.

[0047] Figure 2 This is a block diagram of the harmonic current injection test device based on order noise level proposed in the embodiments of this application.

[0048] like Figure 2 As shown, the harmonic current injection test device 10 based on order noise level includes: a judgment module 100, a determination module 200, and a test module 300.

[0049] The system includes a judgment module 100, which determines whether the vehicle under test meets the preset test conditions; a determination module 200, which determines multiple motor test speeds and multiple motor test torques if the vehicle under test meets the preset test conditions, and determines multiple test conditions based on the multiple motor test speeds and multiple motor test torques; and a test module 300, which injects harmonic current into the motors of the vehicle under test under each test condition, collects noise data at at least one location of the vehicle under test, and obtains a current map for each test condition based on the noise data at at least one location and the multiple test conditions.

[0050] Optionally, in some embodiments, the determining module 200 is further configured to: determine the initial test speed and the final test speed, and obtain multiple motor test speeds based on the initial test speed and the final test speed according to a preset interval; and obtain multiple test conditions based on a combination of each motor test speed and each motor test torque.

[0051] Optionally, in some embodiments, the test module 300 is specifically used to: analyze noise data at at least one location under each test condition to obtain the optimal harmonic current parameters for each test condition; and obtain a current map for each test condition based on the optimal harmonic current parameters for each test condition.

[0052] Optionally, in some embodiments, the determination module 100 is specifically used to: obtain the current speed of the vehicle under test; determine whether the current speed meets the preset stability conditions; if the current speed meets the preset stability conditions, then determine that the vehicle under test meets the preset test conditions.

[0053] Optionally, in some embodiments, before determining whether the vehicle under test meets the preset test conditions, the determination module 100 is further configured to: identify whether the vehicle under test is in the whole vehicle rotating semi-anechoic chamber test chamber; if the vehicle under test is not in the whole vehicle rotating semi-anechoic chamber test chamber, then adjust the vehicle under test to be in the whole vehicle rotating semi-anechoic chamber test chamber.

[0054] It should be noted that the foregoing explanation of the embodiment of the harmonic current injection test method based on order noise level also applies to the harmonic current injection test device based on order noise level in this embodiment, and will not be repeated here.

[0055] The harmonic current injection test device based on order noise level proposed in this application can first determine whether the vehicle under test meets the preset test conditions. If it does, it determines the test speed, torque, and corresponding test conditions of multiple motors. Under each test condition, harmonic current is injected into the motor of the vehicle under test, and noise data is collected at at least one location of the vehicle under test. Finally, the current map of each test condition is obtained by combining the noise data and the test conditions. This solves the problem that the strategies of related technologies are all indirect optimization of motor noise, mainly based on simulation and supplemented by experimental verification, and cannot be directly applied to the current harmonic injection of motors. It clarifies the current harmonic injection test method and optimizes the order noise of motors from the source.

[0056] Figure 3 A schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device may include: The memory 301, the processor 302, and the computer program stored on the memory 301 and capable of running on the processor 302.

[0057] When the processor 302 executes the program, it implements the harmonic current injection test method based on the order noise level provided in the above embodiments.

[0058] Furthermore, the electronic device also includes: Communication interface 303 is used for communication between memory 301 and processor 302.

[0059] The memory 301 is used to store computer programs that can run on the processor 302.

[0060] The memory 301 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0061] If the memory 301, processor 302, and communication interface 303 are implemented independently, then the communication interface 303, memory 301, and processor 302 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 3 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0062] Optionally, in a specific implementation, if the memory 301, processor 302, and communication interface 303 are integrated on a single chip, then the memory 301, processor 302, and communication interface 303 can communicate with each other through an internal interface.

[0063] Processor 302 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0064] This application also provides a computer-readable storage medium having a computer program stored thereon, which is implemented when executed by a processor. Figure 1 The embodiment describes a harmonic current injection test method based on order noise level.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0067] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0068] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0069] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0070] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0071] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0072] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A method for harmonic current injection testing based on order noise level, characterized in that, include: Determine whether the vehicle under test meets the preset test conditions; If the vehicle under test meets the preset test conditions, then multiple motor test speeds and multiple motor test torques are determined, and multiple test conditions are determined based on the multiple motor test speeds and multiple motor test torques. Harmonic current is injected into the motor of the vehicle under test under each test condition, and noise data at at least one location of the vehicle under test is collected. A current map for each test condition is obtained based on the noise data at the at least one location and the multiple test conditions.

2. The method according to claim 1, characterized in that, The process of determining multiple motor test speeds and multiple motor test torques, and determining multiple test conditions based on the multiple motor test speeds and multiple motor test torques, includes: Determine the initial test speed and the final test speed, and based on a preset interval, obtain the test speeds of the multiple motors according to the initial test speed and the final test speed; The multiple test conditions are obtained by combining the test speed and test torque of each motor.

3. The method according to claim 1, characterized in that, The step of obtaining the current map for each test condition based on the noise data at at least one location and the multiple test conditions includes: Based on each test condition, the noise data at at least one location under the corresponding test condition is analyzed to obtain the optimal harmonic current parameters for each test condition. The current map for each test condition is obtained based on the optimal harmonic current parameters for each test condition.

4. The method according to claim 1, characterized in that, The determination of whether the vehicle under test meets the preset test conditions includes: Obtain the current speed of the vehicle under test; Determine whether the current vehicle speed meets the preset stability conditions; If the current vehicle speed meets the preset stability conditions, then the vehicle under test is determined to meet the preset test conditions.

5. The method according to claim 1, characterized in that, Before determining whether the vehicle under test meets the preset test conditions, the process also includes: Identify whether the vehicle under test is in a full-vehicle rotating semi-anechoic chamber test room; If the vehicle under test is not in the vehicle oscillating semi-anechoic chamber test chamber, then adjust the vehicle under test to be placed in the vehicle oscillating semi-anechoic chamber test chamber.

6. A harmonic current injection test device based on order noise level, characterized in that, include: The judgment module is used to determine whether the vehicle under test meets the preset test conditions; The determination module is used to determine multiple motor test speeds and multiple motor test torques when the vehicle under test meets the preset test conditions, and to determine multiple test conditions based on the multiple motor test speeds and multiple motor test torques; The testing module is used to inject harmonic current into the motor of the vehicle under test under each test condition, collect noise data at at least one location of the vehicle under test, and obtain a current map for each test condition based on the noise data at the at least one location and the multiple test conditions.

7. The apparatus according to claim 6, characterized in that, The determining module is specifically used for: Determine the initial test speed and the final test speed, and based on a preset interval, obtain the test speeds of the multiple motors according to the initial test speed and the final test speed; The multiple test conditions are obtained by combining the test speed and test torque of each motor.

8. The apparatus according to claim 6, characterized in that, The test module is specifically used for: Based on each test condition, the noise data at at least one location under the corresponding test condition is analyzed to obtain the optimal harmonic current parameters for each test condition. The current map for each test condition is obtained based on the optimal harmonic current parameters for each test condition.

9. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the harmonic current injection test method based on order noise level as described in any one of claims 1-5.

10. A computer-readable storage medium storing a computer program, characterized in that, When the program is executed by the processor, it implements the harmonic current injection test method based on the order noise level as described in any one of claims 1-5.

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