Method and system for testing motor fault diagnosis device
By generating and using analog signals of the current characteristic frequency of the faulty motor, the motor fault diagnosis device can effectively reduce the testing cost, simplify the testing method, and solve the problem of high testing cost in the prior art.
Patent Information
- Application Number
- CN202510271198.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2025-06-10
AI Technical Summary
In the prior art, the use of power quality standard sources and corresponding current and voltage transformers for motor fault diagnosis and testing is expensive, and the testing method is cumbersome and occupies a large space.
The processor generates a time domain waveform diagram of the current characteristic frequency of the fault motor. The function signal generator generates an analog signal containing the current characteristic frequency of the fault motor based on the time domain waveform diagram and outputs it to the analog input terminal of the motor fault diagnosis device. The motor fault diagnosis device processes the analog signal and determines whether the preset test conditions are met to generate a test result.
By replacing the power quality standard source and current-voltage transformer, the inter-harmonic signal is generated using a function signal generator, which effectively reduces the testing cost, simplifies the testing method, and reduces the footprint.
Smart Images
Figure CN120121975A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of low-voltage power equipment detection. Specifically, it relates to a test method and system for a motor fault diagnosis device. Background Technique
[0002] For motor fault diagnosis technology based on motor current characteristic analysis, a motor fault diagnosis device using a non-invasive method for sensing measurement.
[0003] The current static model test method requires a power quality standard source and corresponding current and voltage transformers, and the price of power quality standard sources on the market is relatively high. The dynamic model test method for faulty motors has high costs, a relatively cumbersome test method, and a large floor space.
[0004] Aiming at the problem of high test costs using a power quality standard source and corresponding current and voltage transformers in the related art, no effective solution has been proposed yet. Summary of the Invention
[0005] The main purpose of this application is to provide a test method and system for a motor fault diagnosis device to solve the problem of high test costs using a power quality standard source and corresponding current and voltage transformers.
[0006] To achieve the above objective, according to one aspect of this application, a test method for a motor fault diagnosis device is provided.
[0007] The test method for the motor fault diagnosis device according to this application includes: the processor generates a time-domain waveform diagram of the fault motor current characteristic frequency through the software installed on it; the function signal generator generates an analog signal containing the fault motor current characteristic frequency based on the time-domain waveform diagram and outputs the analog signal to the analog input terminal of the motor fault diagnosis device; the motor fault diagnosis device processes the analog signal and determines whether the processed analog signal meets the preset test conditions to generate a test result.
[0008] Further, the motor fault diagnosis device processes the analog signal, including: first converting the analog signal into a digital signal, then calculating the current spectrum signal based on the digital signal through Fourier transform, and finally filtering out specific frequency signals in the current spectrum signal through an adaptive filtering algorithm to retain the corresponding fault characteristic harmonic components, obtaining the processed analog signal.
[0009] Further, the processor generates the characteristic frequency of the faulty motor current through the software installed thereon, including: receiving the current time-domain parameters set by the user; wherein, the current time-domain parameters include: amplitude, fundamental frequency, fault characteristic frequency and initial phase; inputting the current time-domain parameters into the current time-domain signal model, and drawing and generating a time-domain waveform diagram in the drawing software according to the current time-domain signal model with the input current time-domain parameters.
[0010] Further, the function signal generator generates an analog signal containing the characteristic frequency of the faulty motor current based on the characteristic frequency of the faulty motor current, including: when the function signal generator receives a trigger signal from the user, generating an analog signal containing the characteristic frequency of the faulty motor current according to the time-domain waveform diagram.
[0011] Further, it is determined whether the processed analog signal meets the preset test conditions to generate a test result, including: determining whether the processed analog signal exceeds the preset test threshold; if so, generating a test result that the motor fault diagnosis is accurate; if not, generating a test result that the motor fault diagnosis is inaccurate.
[0012] Further, the setting of the test threshold includes: determining the test threshold corresponding to the motor fault diagnosed by the motor fault diagnosis device based on a pre-set motor fault factor-signal frequency relationship table; wherein, the motor fault factors at least include: motor rotor fault and motor stator fault.
[0013] To achieve the above object, according to another aspect of the present application, a test device for a motor fault diagnosis device is provided.
[0014] The test device for the motor fault diagnosis device according to the present application includes: a processor for generating a time-domain waveform diagram of the characteristic frequency of the faulty motor current through the software installed thereon; a function signal generator for generating an analog signal containing the characteristic frequency of the faulty motor current based on the time-domain waveform diagram and outputting the analog signal to the analog input terminal of the motor fault diagnosis device; the motor fault diagnosis device is connected to the function signal generator for generating a test result by analyzing whether the analog signal meets the preset test conditions.
[0015] Further, the motor fault diagnosis device processes the analog signal, including: first converting the analog signal into a digital signal, then calculating the current frequency spectrum signal based on the digital signal through Fourier transform, and finally filtering out specific frequency signals in the current frequency spectrum signal through an adaptive filtering algorithm and retaining the corresponding fault characteristic harmonic components to obtain the processed analog signal.
[0016] Further, determine whether the processed analog signal meets a preset test condition to generate a test result, including: determining whether the processed analog signal exceeds a preset test threshold; if so, generate a test result indicating accurate motor fault diagnosis; if not, generate a test result indicating inaccurate motor fault diagnosis.
[0017] Further, the setting of the test threshold includes: determining, based on a pre-set motor fault factor-signal frequency relationship table, the test threshold corresponding to the motor fault diagnosed by the motor fault diagnosis device; wherein, the motor fault factors at least include: motor rotor fault and motor stator fault.
[0018] In the embodiment of the present application, in the manner of testing the motor fault diagnosis device by using an improved static model test method, the processor generates a time-domain waveform diagram of the characteristic frequency of the faulty motor current through the software installed thereon; the function signal generator generates an analog signal containing the characteristic frequency of the faulty motor current based on the time-domain waveform diagram, and outputs the analog signal to the analog input terminal of the motor fault diagnosis device; the motor fault diagnosis device processes the analog signal and determines whether the processed analog signal meets a preset test condition to generate a test result; it achieves the purpose of using a function signal generator to replace the power quality standard source and current and voltage transformers to generate interharmonic signals, thereby realizing the technical effect of effectively reducing costs, and further solving the technical problem of high test costs when using a power quality standard source and corresponding current and voltage transformers. Description of the Drawings
[0019] The drawings constituting a part of this application are used to provide a further understanding of this application, making other features, objectives, and advantages of this application more obvious. The schematic embodiments and their descriptions of this application are used to explain this application and do not constitute an improper limitation of this application. In the drawings: Figure 1 is a flowchart of a test method for a motor fault diagnosis device according to an embodiment of this application; Figure 2 is a structural diagram of a test system for a motor fault diagnosis device according to an embodiment of this application. Detailed Embodiments
[0020] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0021] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so as to implement the embodiments of this application described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.
[0022] In this application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation or be constructed and operated in a specific orientation.
[0023] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.
[0024] In addition, the terms "installed", "set", "provided with", "connected", "connected to", "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0025] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine the embodiments to detail this application.
[0026] According to an embodiment of the present invention, a test method for a motor fault diagnosis device is provided. As Figure 1 shown, the method includes the following steps S101 to step S103: Step S101, the processor generates a time-domain waveform diagram of the characteristic frequency of the faulty motor current through the software installed on it; The motor fault diagnosis device can detect components such as the rotor and stator of the motor, obtain the analog quantity of the motor fault characteristics, and reflect whether the rotor or stator of the motor has a fault through the range in which the analog quantity of the motor fault characteristics is located. When the motor fault diagnosis device detects the analog quantity of the motor fault characteristics, it is transmitted to the processor, and the software installed on the processor can process the analog quantity of the motor fault characteristics to generate any waveform corresponding to the analog quantity, that is, the time-domain waveform diagram.
[0027] Exemplarily, the motor fault diagnosis device includes the motor rotor fault diagnosis function, and the characteristic frequency component of the rotor fault current is QUOTE , where f is the characteristic harmonic component of the rotor fault current s , s is the slip of the motor, k = 1, 2, 3, …, f 0 is the fundamental frequency.
[0028] In this embodiment, preferably, the processor generates a time-domain waveform diagram of the characteristic frequency of the fault motor current through the software installed thereon, including: Receiving the current time-domain parameters set by the user; wherein, the current time-domain parameters include: amplitude, fundamental frequency, fault characteristic frequency, and initial phase; Inputting the current time-domain parameters into the current time-domain signal model, and drawing and generating a time-domain waveform diagram in the drawing software according to the current time-domain signal model with the input current time-domain parameters.
[0029] For example, the current time-domain signal is: y = A*sin(2*pi*f*t + 2*pi*f1*t + ϕ), where A is the amplitude, f is the fundamental frequency, f1 is the fault characteristic frequency, t is the time, and ϕ is the initial phase). If the current fundamental frequency is 50Hz, the fault characteristic frequencies are 49Hz and 51Hz, then the time-domain signal expression is y1 = A*sin(2*pi*50*t + 2*pi*49*t + 2*pi*51*t + ϕ). Inputting the time-domain signal expression y1, the required waveform is automatically generated.
[0030] Step S102: The function signal generator generates an analog signal containing the characteristic frequency of the fault motor current based on the time-domain waveform diagram, and outputs the analog signal to the analog input end of the motor fault diagnosis device; Using a function signal generator to replace the power quality standard source and current and voltage transformers to generate interharmonic signals (i.e., analog signals containing the characteristic frequency of the fault motor current) can effectively reduce costs; the generated analog signal containing the characteristic frequency of the fault motor current is output to the analog input end of the motor fault diagnosis device through the function signal generator.
[0031] Specifically, the function signal generator generates an analog signal containing the characteristic frequency of the faulty motor current based on the time-domain waveform diagram, including: When the function signal generator receives the user's trigger signal, it generates an analog signal containing the characteristic frequency of the faulty motor current according to the time-domain waveform diagram.
[0032] After completing the above settings, press the "Output" or "Start" button on the signal generator (the labels may vary for different devices), and it will start outputting the set analog signal. Use a suitable connecting wire to connect the output port of the function signal generator to the input port of the device for receiving and detecting the analog signal (such as a motor fault diagnosis device, etc.), and ensure the connection is firm to ensure accurate signal transmission.
[0033] Step S103: The motor fault diagnosis device processes the analog signal and determines whether the processed analog signal meets the preset test conditions to generate a test result.
[0034] After receiving the analog signal containing the characteristic frequency of the faulty motor current, the motor fault diagnosis device first processes it, and then determines whether the processed analog signal meets the preset test conditions to generate a test result for whether the motor fault diagnosis is accurate. Specifically, determining whether the processed analog signal meets the preset test conditions to generate a test result includes: determining whether the processed analog signal exceeds the preset test threshold; if so, generating a test result indicating accurate motor fault diagnosis; if not, generating a test result indicating inaccurate motor fault diagnosis. This realizes the detection of the fault recognition accuracy rate of the motor fault diagnosis device, simplifies the test method of the on-line motor fault diagnosis device, and reduces the test cost of the on-line motor fault diagnosis device.
[0035] From the above description, it can be seen that the present invention achieves the following technical effects: In the embodiment of the present application, by using an improved static model test method to test the motor fault diagnosis device, the processor generates a time-domain waveform diagram of the characteristic frequency of the faulty motor current through the software installed on it; the function signal generator generates an analog signal containing the characteristic frequency of the faulty motor current based on the time-domain waveform diagram and outputs the analog signal to the analog input end of the motor fault diagnosis device; the motor fault diagnosis device processes the analog signal and determines whether the processed analog signal meets the preset test conditions to generate a test result; it achieves the purpose of using the function signal generator to replace the power quality standard source and current and voltage transformers to generate interharmonic signals, thereby realizing the technical effect of effectively reducing costs, and further solving the technical problem of high test costs when using the power quality standard source and the corresponding current and voltage transformers.
[0036] According to an embodiment of the present invention, preferably, the setting of the test threshold includes: Based on a pre-set motor fault factor-signal frequency relationship table, determining a test threshold corresponding to the motor fault diagnosed by the motor fault diagnosis device; wherein, the motor fault factor at least includes: motor rotor fault and motor stator fault.
[0037] Research shows that different fault causes will result in signal frequencies of different fault characteristic harmonic components; based on this, a motor fault factor-signal frequency relationship table has been pre-set on the motor fault diagnosis device. In this table, the motor fault factor represents different fault causes, such as motor rotor fault and motor stator fault, etc.; the signal frequency is the signal frequency of the fault characteristic harmonic component corresponding to different fault causes; thus, according to this relationship table and the motor fault diagnosed by the motor fault diagnosis device, the signal frequency corresponding to this motor fault can be determined, which is the test threshold. The automatic determination of the test threshold corresponding to different fault causes is realized, thereby effectively improving the test accuracy.
[0038] It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.
[0039] According to an embodiment of the present invention, there is also provided a system for implementing the above-mentioned test method of the motor fault diagnosis device, as Figure 2 shown, this system includes: A processor 10, configured to generate a time-domain waveform diagram of the characteristic frequency of the fault motor current through the software installed thereon; The motor fault diagnosis device can detect components such as the rotor and stator of the motor, obtain the analog quantity of the motor fault characteristics, and reflect whether the rotor or stator of the motor has a fault through the range where the analog quantity of the motor fault characteristics is located. When the motor fault diagnosis device detects the analog quantity of the motor fault characteristics, it is transmitted to the processor, and the software installed on the processor can process the analog quantity of the motor fault characteristics to generate an arbitrary waveform corresponding to the analog quantity, that is, a time-domain waveform diagram.
[0040] Exemplarily, the motor fault diagnosis device includes a motor rotor fault diagnosis function, and the characteristic frequency component of the rotor fault current is QUOTE , where is the characteristic harmonic component of the rotor fault current f s , s is the slip of the motor, k = 1, 2, 3, …, f 0 is the fundamental frequency.
[0041] In this embodiment, preferably, the processor generates a time domain waveform diagram of the fault motor current characteristic frequency through software installed thereon, including: Receive current time domain parameters set by the user; wherein the current time domain parameters include: amplitude, fundamental frequency, fault characteristic frequency and initial phase; The current time domain parameters are input into the current time domain signal model, and the current time domain signal model of the input current time domain parameters is drawn and generated in the drawing software.
[0042] For example, the current time domain signal is: y = A*sin(2*pi*f*t +2*pi*f1*t+ ϕ), where A is the amplitude, f is the fundamental frequency, f1 is the fault characteristic frequency, t is time, and ϕ is the initial phase). If the current fundamental frequency is 50Hz, and the fault characteristic frequencies are 49Hz and 51Hz, then the time domain signal expression is y1 = A*sin(2*pi*50*t +2*pi*49*t + 2*pi*51*t+ ϕ). If the input time domain signal expression is y1, the required waveform will be automatically generated.
[0043] A function signal generator 20 is used for generating an analog signal containing the characteristic frequency of the fault motor current based on the time domain waveform diagram, and outputting the analog signal to the analog input terminal of the motor fault diagnosis device; Using a function signal generator to replace the power quality standard source and current and voltage transformer to generate an interharmonic signal (i.e., an analog signal containing the characteristic frequency of the faulty motor current) can effectively reduce costs; the generated analog signal containing the characteristic frequency of the faulty motor current is output to the analog input terminal of the motor fault diagnosis device through the function signal generator.
[0044] Specifically, the function signal generator generates an analog signal containing the characteristic frequency of the fault motor current based on the time domain waveform diagram, including: When the function signal generator receives a trigger signal from the user, it generates an analog signal containing the characteristic frequency of the fault motor current according to the time domain waveform diagram.
[0045] After completing the above settings, press the "Output" or "Start" button on the signal generator (different devices may have different logos) to start outputting the set analog signal. Use a suitable connection line to connect the output port of the function signal generator to the input port of the device used to receive and detect the analog signal (such as a motor fault diagnosis device, etc.), and ensure that the connection is firm to ensure that the signal can be accurately transmitted.
[0046] The motor fault diagnosis device 30 is connected to the function signal generator 20 and is used to generate a test result by analyzing whether the analog signal meets a preset test condition.
[0047] After receiving the analog signal containing the characteristic frequency of the faulty motor current, the motor fault diagnosis device first processes it, and then determines whether the processed analog signal meets the preset test condition to generate a test result on whether the motor fault diagnosis is accurate. Specifically, determining whether the processed analog signal meets the preset test condition to generate a test result includes: determining whether the processed analog signal exceeds the preset test threshold; if so, generating a test result indicating that the motor fault diagnosis is accurate; if not, generating a test result indicating that the motor fault diagnosis is inaccurate. This realizes the detection of the fault recognition accuracy rate of the motor fault diagnosis device, simplifies the test method of the on-line motor fault diagnosis device, and reduces the test cost of the on-line motor fault diagnosis device.
[0048] From the above description, it can be seen that the present invention achieves the following technical effects: In the embodiment of the present application, by using an improved static model test method to test the motor fault diagnosis device, the processor generates a time-domain waveform diagram of the characteristic frequency of the faulty motor current through the software installed on it; the function signal generator generates an analog signal containing the characteristic frequency of the faulty motor current based on the time-domain waveform diagram and outputs the analog signal to the analog input terminal of the motor fault diagnosis device; the motor fault diagnosis device processes the analog signal and determines whether the processed analog signal meets the preset test condition to generate a test result; this achieves the purpose of using the function signal generator to replace the power quality standard source and current and voltage transformers to generate interharmonic signals, thereby realizing the technical effect of effectively reducing costs, and further solving the technical problem of high test costs when using the power quality standard source and the corresponding current and voltage transformers for testing.
[0049] According to an embodiment of the present invention, preferably, the setting of the test threshold includes: Based on a pre-set motor fault factor-signal frequency relationship table, determining the test threshold corresponding to the motor fault diagnosed by the motor fault diagnosis device; wherein, the motor fault factors at least include: motor rotor fault and motor stator fault.
[0050] Research shows that different fault causes will result in signal frequencies of different fault characteristic harmonic components. Based on this, a relationship table of motor fault factors - signal frequencies is pre-set on the motor fault diagnosis device. In this table, the motor fault factors represent different fault causes, such as motor rotor faults and motor stator faults, etc.; the signal frequency is the signal frequency of the fault characteristic harmonic component corresponding to different fault causes. Thus, according to this relationship table and the motor fault diagnosed by the motor fault diagnosis device, the signal frequency corresponding to this motor fault can be determined, which is the test threshold. The automatic determination of the test threshold corresponding to different fault causes is realized, thereby effectively improving the test accuracy rate.
[0051] Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present invention can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. Optionally, they can be implemented by program codes executable by the computing device. Thus, they can be stored in a storage device for execution by the computing device, or they can be separately fabricated into individual integrated circuit modules, or multiple modules or steps of them can be fabricated into a single integrated circuit module for implementation. In this way, the present invention is not limited to any specific combination of hardware and software.
[0052] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.
Claims
1. A testing method for a motor fault diagnosis device, characterized in that: include: The processor generates a time domain waveform diagram of the characteristic frequency of the fault motor current through software installed thereon; The function signal generator generates an analog signal containing the characteristic frequency of the fault motor current based on the time domain waveform diagram, and outputs the analog signal to the analog input terminal of the motor fault diagnosis device; The motor fault diagnosis device processes the analog signal and determines whether the processed analog signal meets a preset test condition to generate a test result.
2. The testing method according to claim 1, characterized in that: The motor fault diagnosis device processes the analog signal, including: First, the analog signal is converted into a digital signal, and then the current spectrum signal is calculated based on the digital signal through Fourier transform. Finally, the specific frequency signal in the current spectrum signal is filtered out through an adaptive filtering algorithm, and the corresponding fault characteristic harmonic component is retained to obtain the processed analog signal.
3. The testing method according to claim 1, characterized in that: The processor generates a time domain waveform of the fault motor current characteristic frequency through the software installed thereon, including: Receive current time domain parameters set by the user; wherein the current time domain parameters include: amplitude, fundamental frequency, fault characteristic frequency and initial phase; The current time domain parameters are input into the current time domain signal model, and the time domain waveform diagram is drawn and generated in the drawing software according to the current time domain signal model of the input current time domain parameters.
4. The testing method according to claim 1, characterized in that: The function signal generator generates an analog signal containing the characteristic frequency of the fault motor current based on the time domain waveform, including: When the function signal generator receives a trigger signal from the user, it generates an analog signal containing the characteristic frequency of the fault motor current according to the time domain waveform diagram.
5. The testing method according to claim 1, characterized in that: Determine whether the processed analog signal meets the preset test conditions to generate test results, including: It is determined whether the processed analog signal exceeds a preset test threshold; if so, a test result indicating accurate motor fault diagnosis is generated; if not, a test result indicating inaccurate motor fault diagnosis is generated.
6. The testing method according to claim 5, characterized in that: The setting of the test threshold includes: Based on a preset motor fault factor-signal frequency relationship table, a test threshold corresponding to the motor fault diagnosed by the motor fault diagnosis device is determined; wherein the motor fault factor includes at least: motor rotor fault and motor stator fault.
7. A test system for a motor fault diagnosis device, characterized in that: include: A processor, for generating a time domain waveform diagram of a characteristic frequency of a fault motor current through software installed thereon; A function signal generator is used to generate an analog signal containing the characteristic frequency of the fault motor current based on the time domain waveform diagram, and output the analog signal to the analog input terminal of the motor fault diagnosis device; The motor fault diagnosis device is connected to the function signal generator and is used to generate a test result by analyzing whether the simulation signal meets a preset test condition.
8. The test system according to claim 7, characterized in that: The motor fault diagnosis device processes the analog signal, including: First, the analog signal is converted into a digital signal, and then the current spectrum signal is calculated based on the digital signal through Fourier transform. Finally, the specific frequency signal in the current spectrum signal is filtered out through an adaptive filtering algorithm, and the corresponding fault characteristic harmonic component is retained to obtain the processed analog signal.
9. The test system according to claim 7, characterized in that: Determine whether the processed analog signal meets the preset test conditions to generate test results, including: It is determined whether the processed analog signal exceeds a preset test threshold; if so, a test result indicating accurate motor fault diagnosis is generated; if not, a test result indicating inaccurate motor fault diagnosis is generated.
10. The test system according to claim 9, characterized in that: The setting of the test threshold includes: Based on a preset motor fault factor-signal frequency relationship table, a test threshold corresponding to the motor fault diagnosed by the motor fault diagnosis device is determined; wherein the motor fault factor includes at least: motor rotor fault and motor stator fault.