Strategy optimization method and device based on noise test of motor controller
By testing and optimizing the electric drive system test bench and vehicle environment and adjusting the switching frequency strategy table, the problem of ineffective noise reduction in the electric drive system is solved, and the silence performance and operating efficiency of the electric vehicle are improved.
Patent Information
- Application Number
- CN202510102559.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2025-05-23
AI Technical Summary
The prior art is difficult to accurately avoid multiple inherent mode frequencies of the electric drive system, resulting in the inability to effectively reduce the noise of the motor controller, affecting the silence performance and operating efficiency of the electric vehicle.
By testing and optimizing in the electric drive system test bench and vehicle environment, the switching frequency strategy table is gradually adjusted until the preset noise target requirements are met, thereby accurately avoiding multiple inherent mode frequencies of the electric drive system.
It achieves accurate and efficient optimization of motor controller noise, significantly improving the silent performance and overall operating efficiency of electric vehicles.
Smart Images
Figure CN120029231A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of bench and vehicle testing, and in particular to a strategy optimization method and device based on motor controller noise testing. Background Art
[0002] With the rapid development of electric vehicle technology, electric vehicles have become an important part of the modern transportation field. The power system of electric vehicles is mainly composed of core components such as power batteries, motors and their controllers. Among them, the motor controller is responsible for converting the high-voltage direct current provided by the power battery into three-phase alternating current to drive the motor to work. However, during the operation of the motor controller, a large number of time harmonics will be generated in the stator three-phase current after inversion using PWM space vector pulse width modulation technology, and then harmonics will be generated in the air gap magnetic field of the motor. These harmonics will introduce higher harmonics, causing the motor to generate electromagnetic vibration noise. In the prior art, the controller switching frequency is usually increased to reduce the noise within the sensitive range of the human ear. However, this method cannot accurately avoid multiple natural modal frequencies of the motor controller system, and will increase the switching loss of the controller at high frequencies. Summary of the invention
[0003] The purpose of the embodiments of the present application is to provide a strategy optimization method and device based on motor controller noise testing, which can test the motor controller noise in a test bench and vehicle environment, accurately and efficiently select a switching frequency strategy that meets the noise requirements, and ensure that the controller switching frequency can accurately avoid multiple natural modal frequencies of the electric drive system, thereby providing a practical optimization approach for effectively reducing motor controller noise and significantly improving the quietness performance and overall operating efficiency of electric vehicles.
[0004] The first aspect of the present application provides a strategy optimization method based on motor controller noise testing, comprising:
[0005] Determine the preset initial switching frequency strategy table and preset noise target;
[0006] On the electric drive system test bench, the motor controller to be tested is tested for acceleration noise under different torques to obtain bench test results;
[0007] Determining a bench noise exceeding standard operating condition in which the controller switching frequency noise exceeds the preset noise target according to the bench test result;
[0008] According to the test bench noise exceeding standard working condition, the initial switching frequency strategy table is optimized for frequency conversion strategy to obtain an optimized switching frequency strategy table;
[0009] Testing the controller noise under the optimized switching frequency strategy table on the whole vehicle to obtain the whole vehicle test result;
[0010] When it is determined according to the vehicle test result that the optimized switching frequency strategy table meets the preset noise target requirement, the optimized switching frequency strategy table is determined as the final switching frequency strategy table.
[0011] In the above implementation process, the strategy optimization method based on the motor controller noise test can accurately adjust the switching frequency strategy table by gradually testing and optimizing on the test bench and the whole vehicle until the preset noise target requirements are met, thereby effectively reducing the noise of the motor controller and improving the quietness performance and ride comfort of the electric vehicle.
[0012] Further, the frequency conversion strategy of the initial switching frequency strategy table is optimized according to the test bench noise exceeding standard working condition to obtain an optimized switching frequency strategy table, including:
[0013] The noise under the condition of constant torque and constant speed is tested according to the test bench noise exceeding the standard working condition to obtain the noise test result;
[0014] The initial switching frequency strategy table is optimized according to the noise test result to obtain an optimized switching frequency strategy table.
[0015] Further, the initial switching frequency strategy table is optimized according to the noise test result to obtain an optimized switching frequency strategy table, including:
[0016] According to the noise test results, the optimal switching frequencies under different torques and different speeds are respectively selected;
[0017] The initial switching frequency strategy table is optimized according to the optimal switching frequency to obtain an optimized switching frequency strategy table.
[0018] Furthermore, the method further comprises:
[0019] When it is determined according to the vehicle test result that the optimized switching frequency strategy table does not meet the preset noise target requirement, obtaining a vehicle noise exceeding standard operating condition according to the vehicle test result;
[0020] Optimizing the optimized switching frequency strategy table according to the vehicle noise exceeding standard operating condition to obtain an optimized target switching frequency strategy table;
[0021] When the target switching frequency strategy table meets the preset noise target requirement, the target switching frequency strategy table is determined as a final switching frequency strategy table.
[0022] A second aspect of the present application provides a strategy optimization device based on a motor controller noise test, the strategy optimization device based on a motor controller noise test comprising:
[0023] A basic determination unit, used for determining a preset initial switching frequency strategy table and a preset noise target;
[0024] The bench test unit is used to perform acceleration noise tests on the motor controller to be tested under different torques on the electric drive system test bench to obtain bench test results;
[0025] A working condition determination unit, configured to determine a bench noise exceeding standard working condition in which the controller switching frequency noise exceeds the preset noise target according to the bench test result;
[0026] An optimization unit, configured to optimize the frequency conversion strategy of the initial switching frequency strategy table according to the test bench noise exceeding standard working condition, so as to obtain an optimized switching frequency strategy table;
[0027] A vehicle testing unit, used to test the controller noise under the optimized switching frequency strategy table on the vehicle to obtain a vehicle testing result;
[0028] A result determination unit is used to determine the optimized switching frequency strategy table as the final switching frequency strategy table when it is determined according to the vehicle test result that the optimized switching frequency strategy table meets the preset noise target requirement.
[0029] Furthermore, the optimization unit comprises:
[0030] A test subunit, used for testing the noise under a constant torque and constant speed condition according to the test bench noise exceeding standard condition, and obtaining a noise test result;
[0031] The optimization subunit is used to optimize the initial switching frequency strategy table according to the noise test result to obtain an optimized switching frequency strategy table.
[0032] Furthermore, the optimization subunit is specifically used to screen out the optimal switching frequencies under different torques and different speeds according to the noise test results;
[0033] The optimization subunit is further configured to optimize the initial switching frequency strategy table according to the optimal switching frequency to obtain an optimized switching frequency strategy table.
[0034] Furthermore, the operating condition determination unit is further configured to obtain an operating condition where the vehicle noise exceeds the standard according to the vehicle test result when it is determined according to the vehicle test result that the optimized switching frequency strategy table does not meet the preset noise target requirement;
[0035] The optimization unit is further used to optimize the optimized switching frequency strategy table according to the vehicle noise exceeding standard working condition to obtain an optimized target switching frequency strategy table;
[0036] The result determination unit is further configured to determine the target switching frequency strategy table as a final switching frequency strategy table when the target switching frequency strategy table meets the preset noise target requirement.
[0037] A third aspect of the present application provides an electronic device, including a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the strategy optimization method based on motor controller noise testing as described in any one of the first aspect of the present application.
[0038] A fourth aspect of the present application provides a computer-readable storage medium storing computer program instructions. When the computer program instructions are read and executed by a processor, the strategy optimization method based on motor controller noise testing described in any one of the first aspect of the present application is executed.
[0039] The beneficial effects of this application are: the method and device can pass the constant torque and constant speed working condition test on the test bench, comprehensively cover all torque and speed working conditions, and ensure that the controller switching frequency can accurately avoid multiple natural modal frequencies of the electric drive system. At the same time, the method and device can continue to perform constant torque acceleration working condition tests on the whole vehicle, quickly identify the local torque and speed range where the noise exceeds the standard, and continue to optimize the switching frequency, and finally formulate a switching frequency conversion strategy table that meets the noise requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0041] Figure 1 A schematic flow chart of a strategy optimization method based on motor controller noise testing provided in an embodiment of the present application;
[0042] Figure 2 An example diagram of a speed-frequency-noise waterfall provided in an embodiment of the present application;
[0043] Figure 3 An example diagram of controller switching frequency noise order slicing provided in an embodiment of the present application;
[0044] Figure 4 A noise curve diagram of a constant torque and constant speed working condition provided in an embodiment of the present application;
[0045] Figure 5An example diagram of a near-field switching frequency noise curve provided in an embodiment of the present application;
[0046] Figure 6 A schematic diagram of the structure of a strategy optimization device based on motor controller noise testing provided in an embodiment of the present application. DETAILED DESCRIPTION
[0047] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.
[0048] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0049] Example 1
[0050] Please see Figure 1 , Figure 1 A schematic flow chart of a strategy optimization method based on motor controller noise testing provided in this embodiment. The strategy optimization method based on motor controller noise testing includes:
[0051] S101 , setting a motor controller noise near-field target and a preliminary switching frequency strategy table.
[0052] In this embodiment, the method can determine the preset initial switching frequency strategy table and the preset noise target through this step, so that they can provide a corresponding data basis for subsequent test steps.
[0053] In this embodiment, the motor controller noise near-field target may be a near-field noise target 10 cm away from the outer surface of the controller.
[0054] S102. On the electric drive system test bench, perform acceleration noise tests on the motor controller to be tested under different torques, and identify torque and speed conditions where the controller switching frequency noise exceeds the target value.
[0055] In this embodiment, the torque and speed operating condition is the full name of the corresponding operating condition, and the subsequent noise exceeding standard operating condition is also a torque and speed operating condition.
[0056] In this embodiment, this step describes a process of performing acceleration noise tests on the motor controller to be tested at different torques on an electric drive system test bench to obtain bench test results; and then identifying the noise exceeding standard operating conditions based on the bench test results. The method can identify the noise exceeding standard operating conditions based on the bench test results and the preset noise target.
[0057] For example, this method can be used to test acceleration noise under constant torque on an electric drive system test bench and identify torque and speed conditions where the controller switching frequency noise exceeds the target value.
[0058] The torque conditions of the test are carried out at certain intervals, such as measuring a condition every 40Nm. The entire test condition is divided into: 40Nm, 80Nm, 120Nm, 160Nm, 200Nm, 240Nm... maximum torque. The speed of the acceleration condition is accelerated from 0 to 12000rpm.
[0059] Please see Figure 2 and Figure 3 , Figure 2 shows an example diagram of a speed-frequency-noise waterfall, Figure 3 An example of controller switching frequency noise order slicing is shown. Figure 2 and Figure 3 They all correspond to the test condition of 160Nm, and are example noise graphs obtained under the test condition of 160Nm.
[0060] S103, optimizing the frequency conversion strategy for the working condition where the noise exceeds the standard, and testing the noise under the working condition of constant torque and constant speed.
[0061] In this embodiment, when the method identifies a noise-exceeding condition based on bench test results and preset noise targets, it can perform a noise test under constant torque and constant speed conditions based on the noise-exceeding condition to obtain a noise test result.
[0062] For example, this method can set a constant motor torque and a constant motor speed on a test bench to obtain the noise at different controller switching frequencies under constant torque and constant speed conditions. Among them, some of the tested conditions are as follows: 160Nm-1000rpm; 160Nm-2000rpm; 160Nm-3000rpm; 160Nm-4000rpm; 160Nm-5000rpm; 160Nm-6000rpm; 160Nm-7000rpm; 160Nm-8000rpm... 200Nm-2000rpm; 200Nm-3000rpm; 200Nm-4000rpm; 200Nm-5000rpm; 200Nm-6000rpm; 200Nm-7000rpm; 200Nm-8000rpm..., the torque interval is 40Nm, and the speed interval is 1000rpm.
[0063] Based on this, all working conditions can be summarized as the switching frequency strategy map shown in Table 1, and the switching frequency strategy map can be regarded as the noise test result.
[0064] Table 1 Torque-speed-switching frequency strategy map
[0065]
[0066] In this embodiment, the noise frequency f caused by the controller harmonic current is expressed as f=k 1 f T ±k 2 f 0 .
[0067] Where: f T is the switching frequency of the controller; f 0 is the frequency corresponding to the motor speed; k 1 , k 2 is a positive integer with opposite odd and even numbers. This method can calculate the frequency of the controller noise according to this formula.
[0068] S104. According to the bench noise test results, the optimal switching frequencies under different torques and different speeds are respectively selected to form a switching frequency strategy table covering all torques and speeds.
[0069] In this embodiment, this step describes the process of testing the noise under the condition of constant torque and constant speed according to the condition of bench noise exceeding the standard, obtaining the noise test results; and selecting the optimal switching frequencies under different torques and different speeds according to the noise test results; and further optimizing the initial switching frequency strategy table according to the optimal switching frequency to obtain the optimized switching frequency strategy table. Among them, the switching frequency strategy table covering all torques and speeds is the optimized switching frequency strategy table.
[0070] In this embodiment, the controller noise under different switching frequencies is tested in each working condition, and the controller switching frequency is changed at intervals of 100 Hz.
[0071] Taking the 200Nm-4000rpm working condition as an example, the tested controller switching frequencies include 8000Hz, 8100Hz, 8200Hz, 8300Hz, 8400Hz, 8500Hz, 8600Hz...
[0072] Please see Figure 4 , Figure 4 A noise curve diagram for a constant torque and constant speed condition is shown. The diagram corresponds to a 200Nm-4000rpm condition, and specifically shows the near-field noise under different controller switching frequencies under this condition. The process of selecting the optimal switching frequency in the method may include:
[0073] (1) Select a switching frequency that meets the noise target requirements;
[0074] (2) Screen out the switching frequency with less noise;
[0075] (3) Select the minimum frequency as the final switching frequency.
[0076] by Figure 4 For example, under the working condition of 200Nm-4000rpm, this method can select 8200Hz as the optimal switching frequency.
[0077] In this embodiment, the method can formulate a switching frequency strategy table optimized for different torques and different speeds based on the optimal results of the test on the bench. When the method selects the optimal switching frequency for each working condition, a switching frequency strategy map table covering the entire torque and speed working conditions can be obtained.
[0078] S105 . Test the controller noise under the new switching frequency strategy table on the whole vehicle, and execute step S106 or step S107 .
[0079] In this embodiment, after the bench test, the method can be further tested on the whole vehicle to determine the actual application effect of the whole vehicle.
[0080] In this embodiment, this step describes the process of testing the controller noise under the optimized switching frequency strategy table on the whole vehicle to obtain the whole vehicle test result.
[0081] For example, the method can arrange a microphone 10cm away from the near field of the controller. Test the acceleration noise under constant torque. Accelerate the motor speed from 0 to 12000rpm, and the test torques include 40Nm; 80Nm; 120Nm; 160Nm; 200Nm... until the maximum torque, with a torque interval of 40Nm.
[0082] In this embodiment, the method can process the switching frequency noise of the acceleration controller under each torque condition tested above to obtain a curve of the switching frequency noise changing with the speed, so as to obtain Figure 5 An example of a near-field switching frequency noise curve is shown. Based on this graph, it can be determined whether the controller switching frequency noise under each operating condition meets the target requirements. If the controller switching frequency noise under each operating condition meets the target requirements, it indicates that the controller switching frequency strategy is qualified. If the controller switching frequency noise under a certain operating condition tested still does not meet the target requirements, further optimization is required.
[0083] S106: If the noise of each working condition on the whole vehicle meets the requirements, the new switching frequency strategy table is directly determined as the final switching frequency strategy table, and this process ends.
[0084] In this embodiment, when it is determined according to the vehicle test results that the optimized switching frequency strategy table meets the preset noise target requirement, the method can directly determine the optimized switching frequency strategy table as the final switching frequency strategy table.
[0085] S107. If the noise of some working conditions on the whole vehicle still does not meet the requirements, the switching frequency strategy is further adjusted on the whole vehicle for the problematic working conditions until the noise requirements are met, thereby forming a final switching frequency strategy table.
[0086] In this embodiment, this step describes a method for handling when it is determined based on the vehicle test results that the optimized switching frequency strategy table does not meet the preset noise target requirements. In this process, the method can further obtain the vehicle noise exceeding standard operating conditions based on the vehicle test results; and optimize the optimized switching frequency strategy table based on the vehicle noise exceeding standard operating conditions to obtain an optimized target switching frequency strategy table; until the target switching frequency strategy table meets the preset noise target requirements, the target switching frequency strategy table is determined as the final switching frequency strategy table.
[0087] For example, this method can obtain the motor torque and speed of the working condition where the noise exceeds the standard. Specifically, the torque and speed range of the working condition where the switching frequency noise exceeds the standard can be identified based on the switching frequency noise obtained in advance, and then different switching frequencies can be adjusted within a certain torque and speed range where the noise exceeds the standard, and then the noise at these switching frequencies can be tested on the whole vehicle, and the curve of the change of switching frequency with speed can be obtained, and the switching frequency that meets the noise target can be selected.
[0088] In this embodiment, the method can simultaneously test the acceleration noise of other unqualified torque conditions, so as to optimize the switching frequency with qualified noise under these conditions.
[0089] In this embodiment, the final switching frequency conversion strategy map table may be shown in Table 2. The switching frequency value in Table 2 is only an example, and different values need to be set according to the above steps for different motor controller systems.
[0090] Table 2 Optimized torque-speed-switching frequency strategy map
[0091]
[0092] In this embodiment, the execution subject of the method may be a computing device such as a computer or a server, and no limitation is made in this embodiment.
[0093] In this embodiment, the execution subject of the method may also be a smart device such as a smart phone, a tablet computer, etc., which is not limited in this embodiment.
[0094] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of a strategy optimization device based on motor controller noise testing provided in this embodiment. Figure 6 As shown, the strategy optimization device based on motor controller noise test includes:
[0095] A basic determination unit 210, configured to determine a preset initial switching frequency strategy table and a preset noise target;
[0096] The bench test unit 220 is used to perform an acceleration noise test under different torques on the motor controller to be tested on the electric drive system test bench to obtain a bench test result;
[0097] An operating condition determination unit 230, for determining a bench noise exceeding standard operating condition in which the controller switching frequency noise exceeds a preset noise target according to the bench test result;
[0098] The optimization unit 240 is used to optimize the frequency conversion strategy of the initial switching frequency strategy table according to the test bench noise exceeding the standard working condition to obtain an optimized switching frequency strategy table;
[0099] A vehicle test unit 250 is used to test the controller noise under the optimized switching frequency strategy table on the vehicle to obtain a vehicle test result;
[0100] The result determination unit 260 is used to determine the optimized switching frequency strategy table as the final switching frequency strategy table when it is determined according to the vehicle test result that the optimized switching frequency strategy table meets the preset noise target requirement.
[0101] As an optional implementation, the optimization unit 240 includes:
[0102] The test subunit 241 is used to test the noise under the condition of constant torque and constant speed according to the test bench noise exceeding the standard condition, and obtain the noise test result;
[0103] The optimization subunit 242 is used to optimize the initial switching frequency strategy table according to the noise test result to obtain an optimized switching frequency strategy table.
[0104] As an optional implementation, the optimization subunit 242 is specifically used to screen out the optimal switching frequencies under different torques and different speeds according to the noise test results;
[0105] The optimization subunit 242 is further configured to optimize the initial switching frequency strategy table according to the optimal switching frequency to obtain an optimized switching frequency strategy table.
[0106] As an optional implementation, the operating condition determination unit 230 is further used to obtain the vehicle noise exceeding standard operating condition according to the vehicle test results when it is determined according to the vehicle test results that the optimized switching frequency strategy table does not meet the preset noise target requirements;
[0107] The optimization unit 240 is further used to optimize the optimized switching frequency strategy table according to the vehicle noise exceeding standard working condition to obtain an optimized target switching frequency strategy table;
[0108] The result determination unit 260 is further configured to determine the target switching frequency strategy table as the final switching frequency strategy table when the target switching frequency strategy table meets the preset noise target requirement.
[0109] It can be seen that the implementation of the strategy optimization method based on motor controller noise testing described in this embodiment can test the motor controller noise in a test bench and vehicle environment, accurately and efficiently select a switching frequency strategy that meets the noise requirements, and ensure that the controller switching frequency can accurately avoid multiple natural modal frequencies of the electric drive system, which provides a practical optimization approach for effectively reducing motor controller noise and significantly improves the quietness performance and overall operating efficiency of electric vehicles.
[0110] This embodiment also provides an electronic device, including a memory and a processor, the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the strategy optimization method based on motor controller noise testing in this embodiment.
[0111] This embodiment further provides a computer-readable storage medium storing computer program instructions. When the computer program instructions are read and executed by a processor, the strategy optimization method based on motor controller noise testing in this embodiment is executed.
[0112] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.
[0113] In addition, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
[0114] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.
[0115] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0116] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
[0117] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
Claims
1. A strategy optimization method based on motor controller noise testing, characterized in that: include: Determine the preset initial switching frequency strategy table and preset noise target; On the electric drive system test bench, the motor controller to be tested is tested for acceleration noise under different torques to obtain bench test results; Determining a bench noise exceeding standard operating condition in which the controller switching frequency noise exceeds the preset noise target according to the bench test result; According to the test bench noise exceeding standard working condition, the initial switching frequency strategy table is optimized for frequency conversion strategy to obtain an optimized switching frequency strategy table; Testing the controller noise under the optimized switching frequency strategy table on the whole vehicle to obtain the whole vehicle test result; When it is determined according to the vehicle test result that the optimized switching frequency strategy table meets the preset noise target requirement, the optimized switching frequency strategy table is determined as the final switching frequency strategy table.
2. The strategy optimization method based on motor controller noise test according to claim 1 is characterized in that: According to the test bench noise exceeding standard working condition, the initial switching frequency strategy table is optimized for frequency conversion strategy to obtain an optimized switching frequency strategy table, including: The noise under the condition of constant torque and constant speed is tested according to the test bench noise exceeding the standard working condition to obtain the noise test result; The initial switching frequency strategy table is optimized according to the noise test result to obtain an optimized switching frequency strategy table.
3. The strategy optimization method based on motor controller noise test according to claim 2 is characterized in that: The initial switching frequency strategy table is optimized according to the noise test result to obtain an optimized switching frequency strategy table, including: According to the noise test results, the optimal switching frequencies under different torques and different speeds are respectively selected; The initial switching frequency strategy table is optimized according to the optimal switching frequency to obtain an optimized switching frequency strategy table.
4. The strategy optimization method based on motor controller noise test according to claim 1 is characterized in that: The method further comprises: When it is determined according to the vehicle test result that the optimized switching frequency strategy table does not meet the preset noise target requirement, obtaining a vehicle noise exceeding standard operating condition according to the vehicle test result; Optimizing the optimized switching frequency strategy table according to the vehicle noise exceeding standard operating condition to obtain an optimized target switching frequency strategy table; When the target switching frequency strategy table meets the preset noise target requirement, the target switching frequency strategy table is determined as a final switching frequency strategy table.
5. A strategy optimization device based on motor controller noise testing, characterized in that: The strategy optimization device based on motor controller noise test includes: A basic determination unit, used for determining a preset initial switching frequency strategy table and a preset noise target; The bench test unit is used to perform acceleration noise tests on the motor controller to be tested under different torques on the electric drive system test bench to obtain bench test results; A working condition determination unit, configured to determine a bench noise exceeding standard working condition in which the controller switching frequency noise exceeds the preset noise target according to the bench test result; An optimization unit, configured to optimize the frequency conversion strategy of the initial switching frequency strategy table according to the test bench noise exceeding standard working condition, so as to obtain an optimized switching frequency strategy table; A vehicle testing unit, used to test the controller noise under the optimized switching frequency strategy table on the vehicle to obtain a vehicle testing result; A result determination unit is used to determine the optimized switching frequency strategy table as the final switching frequency strategy table when it is determined according to the vehicle test result that the optimized switching frequency strategy table meets the preset noise target requirement.
6. The strategy optimization device based on motor controller noise test according to claim 5, characterized in that: The optimization unit comprises: A test subunit, used for testing the noise under a constant torque and constant speed condition according to the test bench noise exceeding standard condition, and obtaining a noise test result; The optimization subunit is used to optimize the initial switching frequency strategy table according to the noise test result to obtain an optimized switching frequency strategy table.
7. The strategy optimization device based on motor controller noise test according to claim 6, characterized in that: The optimization subunit is specifically used to screen out the optimal switching frequencies under different torques and different speeds according to the noise test results; The optimization subunit is further configured to optimize the initial switching frequency strategy table according to the optimal switching frequency to obtain an optimized switching frequency strategy table.
8. The strategy optimization device based on motor controller noise test according to claim 5, characterized in that: The operating condition determination unit is further configured to obtain an operating condition where the vehicle noise exceeds the standard according to the vehicle test result when it is determined according to the vehicle test result that the optimized switching frequency strategy table does not meet the preset noise target requirement; The optimization unit is further used to optimize the optimized switching frequency strategy table according to the vehicle noise exceeding standard working condition to obtain an optimized target switching frequency strategy table; The result determination unit is further configured to determine the target switching frequency strategy table as a final switching frequency strategy table when the target switching frequency strategy table meets the preset noise target requirement.
9. An electronic device, characterized in that: The electronic device comprises a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the strategy optimization method based on motor controller noise test according to any one of claims 1 to 4.
10. A readable storage medium, characterized in that: The readable storage medium stores computer program instructions, and when the computer program instructions are read and executed by a processor, the strategy optimization method based on motor controller noise testing according to any one of claims 1 to 4 is executed.