High-speed brushless variable frequency motor test method

Abstract

The invention discloses a high-speed brushless variable frequency motor test method, which comprises a test system constructed by a high-speed acquisition board card, a multi-path signal follower and a multi-path IO control module, and the test system is matched with a cold and hot impact tester, a dynamometer, a high-precision direct current power supply and a programmable high-power alternating current power supply to form a test platform. The method comprises the following steps: S1, mechanically connecting a to-be-tested motor with a dynamometer, then performing full-link connection and inspection of a signal link and a power supply line, then pre-starting a test system in a no-load manner, and verifying the linkage of an IO module and the validity of the signal link; s2, Hall detection board electric signals of the motor at different rotating speeds are collected in a gear mode, mechanical parameters detected by the dynamometer are recorded synchronously, the collected parameters are adapted in real time, and dynamic working conditions are simulated to complete continuous collection. According to the method, a strict precision verification standard is set for the collected data, the voltage sampling value error is smaller than or equal to 0.001 V, the time axis marking precision is smaller than or equal to 30 ns, all invalid data are removed, and the accuracy of the original data is ensured.

Description

Technical Field

[0001] This invention relates to the field of brushless variable frequency motor testing technology, specifically a testing method for high-speed brushless variable frequency motors. Background Technology

[0002] With the rapid development of industrial automation and intelligent manufacturing, brushless motors are widely used in various application scenarios due to their advantages such as high efficiency, low noise, and long lifespan. However, traditional brushless motor testing and adjustment methods are often difficult to adapt to complex and changing working environments and load conditions, resulting in the motor's performance not being fully utilized. This not only affects production efficiency but may also lead to energy waste and shortened equipment lifespan.

[0003] The existing announcement number CN119154722A discloses a testing and adjustment method and system for an intelligent brushless motor. The method includes: real-time monitoring of the current, speed, and load characteristics of the brushless motor to obtain motor operating data and motor operating mode identification results; constructing a hierarchical optimization scheme for motor parameters; performing dynamic optimization to obtain a set of adaptive control parameters for the motor; performing rolling optimization to obtain a sequence of predictive control commands for the motor; performing multi-objective optimization calculations to obtain a multi-performance balance adjustment scheme for the motor; integrating the multi-performance balance adjustment scheme into a digital twin testing platform to simulate and verify the performance of the brushless motor under different operating conditions, obtaining a motor testing and adjustment strategy. This method can identify the motor's operating mode in real time and can perform parameter optimization and performance prediction based on historical data and the current state, thereby achieving the optimal operating state of the motor under different operating conditions.

[0004] Existing brushless motor testing methods are difficult to adapt to the complex and ever-changing working environments and load conditions in industrial scenarios. They can only complete basic static / single-condition tests and cannot simulate dynamic conditions such as acceleration and deceleration, constant speed with changing load, and frequent start-stop in actual motor operation. They also lack test designs for harsh environments such as extreme temperatures, which makes the test results unable to truly reflect the actual working performance of the motor. After the motor is put into use, it is easy for the performance to be insufficient. Summary of the Invention

[0005] The purpose of this invention is to provide a testing method for high-speed brushless variable frequency motors to solve the problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a testing method for a high-speed brushless variable frequency motor, comprising a testing system built from a high-speed acquisition board, a multi-channel signal follower, and a multi-channel IO control module, wherein the testing system is equipped with a thermal shock tester, a dynamometer, a high-precision DC power supply, and a programmable high-power AC power supply to form a testing platform; the method includes the following steps: S1. Mechanically connect the motor under test to the dynamometer, then perform a full-link connection and check of the signal link and power supply line, and then pre-start the test system under no-load to verify the linkage of the IO module and the effectiveness of the signal link; S2. Collect Hall effect electrical signals from the motor at different speeds in stages, simultaneously record the mechanical parameters detected by the dynamometer, adapt the collected parameters in real time, and simulate dynamic working conditions to complete continuous data acquisition; supplementary data acquisition is required in extreme environments to achieve full signal coverage detection and save all data in real time. S3. Verify the validity of the original data, quantitatively analyze the signal characteristics, conduct correlation analysis of electrical and mechanical parameters and adaptability analysis of the control system, and generate an analysis report; S4. Complete the judgment of individual and overall results according to industry standards, trace the source of non-conformities from multiple dimensions, and retest the entire process after processing the non-conformities. S5. For multiple motors, complete the entire process of sample testing, analyze common problems, optimize the test system parameters and motor assembly process, and finally conduct optimized batch testing.

[0007] Preferably, the software parameter pre-adjustment of the high-speed acquisition board in S1 includes adjusting the acquisition time, number of samples, and sampling frequency according to the model and rated speed of the motor under test; the debugging of the multi-channel signal follower includes setting the signal amplification or reduction ratio to match the signal detection requirements of the motor under test; the signal configuration of the multi-channel IO control module includes configuring the DI signal to associate with the start test and the external monitoring signal sensed by the sensor, and configuring the DO signal to bind the relay on / off and the system control action of the cylinder action.

[0008] Preferably, the mechanical connection in S1 involves coaxially connecting and fixing the output shaft of the motor under test to the dynamometer, with the dynamometer set to torque detection mode; the signal link connection involves connecting the signal output of the Hall effect sensor to the input of a multi-channel signal follower, connecting the output of the follower to the receiver of a high-speed acquisition board, and connecting the multi-channel I / O control module to the host of the test system, the motor control terminal, and the dynamometer circuit respectively; the signal link validity verification involves confirming no signal loss or interference when the motor is running at low speed under no-load, ensuring that the conditioned signal is in a preset ratio to the original signal, and transmitting all data to the user terminal in real time.

[0009] Preferably, the basic speed range acquisition in S2 involves setting the speed in 5-8 gears according to the rated speed range of the motor under test, gradually increasing from low speed to high speed, and completing the synchronous acquisition of signals and mechanical parameters after 5 minutes of stable operation at each gear; the dynamic operating condition simulation acquisition involves setting dynamic operating modes such as motor acceleration and deceleration, constant speed with variable load, and frequent start and stop, with a continuous acquisition time of not less than 30 minutes. The test system processes the acquired data in real time, automatically plots and calculates, and visualizes the results to the user terminal; the full signal coverage detection is achieved by using a high-speed acquisition board to display motor parameters from point to surface in all dimensions, and the acquisition covers all output signal channels of the Hall detection board.

[0010] Preferably, the original data validity verification in S3 involves removing invalid data with interference, distortion, and breakpoints, verifying that the voltage sampling value error is ≤0.001V and the time axis labeling accuracy is ≤30ns. If the accuracy requirements are not met, the corresponding working condition data is re-acquired. The quantitative analysis of signal characteristics involves analyzing the waveform, amplitude, frequency, and phase key parameters of the Hall detection board signal, comparing them with the design standard parameters, and labeling the deviation values. The correlation analysis of electrical and mechanical parameters involves verifying the synchronization and matching degree between the changes in motor speed and torque and the signal output of the Hall detection board.

[0011] Preferably, the qualification criteria in S4 are: no deviation in signal parameters or deviation within the allowable range; synchronous matching of electrical and mechanical parameters; accurate identification and response of the control system to the Hall detection board signal; and signal stability under extreme operating conditions for extreme environment testing. The source of the non-compliance problem is to locate the cause of the problem from four dimensions: hardware, software, assembly, and environment. The hardware dimension includes signal follower and acquisition board failure; the software dimension includes improper acquisition parameter settings; the assembly dimension includes excessive gap between the motor and the Hall detection board and loose wiring; and the environmental dimension includes signal transmission line interference and fluctuation of test environment parameters.

[0012] Preferably, the batch testing optimization in S5 is to address common problems in sample testing by fine-tuning the default sampling frequency of the high-speed acquisition board, the common ratio of the multi-channel signal follower, and optimizing the assembly process of the motor and the Hall detection board.

[0013] A testing system for high-speed brushless variable frequency motor testing methods includes core functional modules and auxiliary testing equipment. The core functional modules include a high-speed acquisition board, a multi-channel signal follower, and a multi-channel I / O control module. The high-speed acquisition board supports software adjustment of acquisition parameters and has built-in data processing algorithms to automatically plot, calculate, and visualize the results. The multi-channel signal follower is used to amplify the signal driving capability and proportionally amplify or reduce the signal. The multi-channel I / O control module is configured with DI signals to monitor external conditions and DO signals to control system actions. The auxiliary testing equipment includes a thermal shock tester, an automatic optical inspection device, a dynamometer, an oscilloscope, a high-precision DC power supply, and a programmable high-power AC power supply, which are used for extreme temperature testing, optical inspection, torque detection, current wave measurement, and stable power supply, respectively.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. Strict accuracy verification standards are set for the collected data, with voltage sampling error ≤0.001V and time axis labeling accuracy ≤30ns. All invalid data are eliminated to ensure the accuracy of the original data. At the same time, by quantitatively analyzing electrical signal parameters and verifying the synchronization of electrical and mechanical parameters, the analysis results are made more quantitative and referential, avoiding the fuzzy judgment of traditional tests.

[0015] 2. On the one hand, it covers all output signal channels of the Hall detection board, and realizes full-dimensional display of motor parameters from point to surface through high-speed acquisition board, avoiding signal omission; on the other hand, it covers three types of test scenarios: basic speed, dynamic working conditions and extreme environment, simulating actual working states such as acceleration and deceleration, variable load, and frequent start and stop, and completes extreme temperature test through thermal shock tester, so that the test results are more in line with the actual application scenario of motor.

[0016] 3. During the test, the acquisition parameters can be adjusted in real time according to the model and rated speed of the motor under test. The basic acquisition of different speeds can be completed in 5-8 levels, and the dynamic working condition acquisition time is no less than 30 minutes. It can accurately adapt to the complex load and variable speed requirements of motors in industrial scenarios, and solve the pain point of traditional testing being unable to adapt to complex working conditions.

[0017] 4. It is not a simple "inspection and judgment", but adds multi-dimensional traceability and rectification and batch process optimization: the causes of non-conformities are located from four dimensions: hardware, software, assembly and environment, and targeted rectification is carried out; at the same time, common problems are analyzed through sample testing, and the test system parameters and motor assembly process are optimized in reverse, which not only improves the versatility of the test method, but also guides the improvement of motor production process and improves the overall product quality.

[0018] 5. The core testing module supports software parameter adjustment, and the IO module realizes automated control of the testing process (such as relay on / off, cylinder action) and automatic monitoring of external status; the testing system can process the collected data in real time, automatically plot and calculate and visualize the data, reduce manual operation, avoid human error, and improve the overall efficiency of data processing and testing.

[0019] 6. The multi-channel signal follower can be set to amplify / reduce the signal proportionally according to the motor requirements. The high-speed acquisition board can flexibly adjust the acquisition time, number of samples, and sampling frequency. There is no need to rebuild the test platform for different motor models, which reduces the investment cost of test equipment and improves the versatility and reusability of the test system. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a flowchart of the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0022] Please see Figure 1 In this embodiment of the invention, a testing method for a high-speed brushless variable frequency motor includes a testing system constructed from a high-speed acquisition board, multiple signal followers, and multiple I / O control modules. The testing system is equipped with a thermal shock tester, a dynamometer, a high-precision DC power supply, and a programmable high-power AC power supply to form a testing platform. The method includes the following steps: S1. Mechanically connect the motor under test to the dynamometer, then perform a full-link connection and check of the signal link and power supply line, and then pre-start the test system under no-load to verify the linkage of the IO module and the effectiveness of the signal link; S2. Collect Hall effect electrical signals from the motor at different speeds in stages, simultaneously record the mechanical parameters detected by the dynamometer, adapt the collected parameters in real time, and simulate dynamic working conditions to complete continuous data acquisition; supplementary data acquisition is required in extreme environments to achieve full signal coverage detection and save all data in real time. S3. Verify the validity of the original data, quantitatively analyze the signal characteristics, conduct correlation analysis of electrical and mechanical parameters and adaptability analysis of the control system, and generate an analysis report; S4. Complete the judgment of individual and overall results according to industry standards, trace the source of non-conformities from multiple dimensions, and retest the entire process after processing the non-conformities. S5. For multiple motors, complete the entire process of sample testing, analyze common problems, optimize the test system parameters and motor assembly process, and finally conduct optimized batch testing.

[0023] The software parameter pre-tuning of the high-speed acquisition board in S1 includes adjusting the acquisition time, number of samples, and sampling frequency according to the model and rated speed of the motor under test; the debugging of the multi-channel signal follower includes setting the signal amplification or reduction ratio to match the signal detection requirements of the motor under test; the signal configuration of the multi-channel IO control module includes configuring the DI signal to start the test and the external monitoring signal sensed by the sensor, and configuring the DO signal to bind the relay on / off and the system control action of the cylinder action.

[0024] The mechanical connection described in S1 involves coaxially connecting and fixing the output shaft of the motor under test to the dynamometer, with the dynamometer set to torque detection mode. The signal link connection involves connecting the signal output of the Hall effect sensor board to the input of a multi-channel signal follower, connecting the output of the follower to the receiver of a high-speed acquisition board, and connecting the multi-channel I / O control module to the test system host, the motor control terminal, and the dynamometer circuit, respectively. The signal link validity verification involves confirming no signal loss or interference when the motor is running at low speed under no-load, ensuring that the conditioned signal is in a preset ratio to the original signal, and transmitting all data to the user terminal in real time.

[0025] The basic speed range acquisition described in S2 involves setting the speed in 5-8 levels according to the rated speed range of the motor under test, gradually increasing from low speed to high speed. After 5 minutes of stable operation at each level, the signal and mechanical parameters are acquired synchronously. The dynamic operating condition simulation acquisition involves setting dynamic operating modes such as motor acceleration and deceleration, constant speed with variable load, and frequent start and stop, with a continuous acquisition time of no less than 30 minutes. The test system processes the acquired data in real time, automatically plots and calculates, and visualizes the results to the user. The full signal coverage detection achieves full-dimensional display of motor parameters from point to surface through a high-speed acquisition board, covering all output signal channels of the Hall effect sensor board. It can accurately adapt to the complex load and variable speed requirements of motors in industrial scenarios, solving the pain point of traditional testing being unable to adapt to complex operating conditions.

[0026] The original data validity verification in S3 involves removing invalid data due to interference, distortion, and breakpoints, verifying that the voltage sampling error is ≤0.001V and the time axis labeling accuracy is ≤30ns. If the accuracy requirements are not met, the corresponding operating condition data is re-acquired. The quantitative analysis of signal characteristics involves analyzing the waveform, amplitude, frequency, and phase key parameters of the Hall effect sensor signal, comparing them with the design standard parameters, and labeling the deviation values. The correlation analysis of electrical and mechanical parameters verifies the synchronization and matching degree between the changes in motor speed and torque and the signal output of the Hall effect sensor. This makes the analysis results more quantitative and referential, avoiding the fuzzy judgments of traditional testing.

[0027] The pass / fail criteria in S4 are: no deviation in signal parameters or deviation within the allowable range; synchronous matching of electrical and mechanical parameters; accurate identification and response of the control system to the Hall detection board signal; and signal stability under extreme conditions for extreme environment testing. The source of non-compliance issues is to locate the cause of the problem from four dimensions: hardware, software, assembly, and environment. The hardware dimension includes signal follower and acquisition board failure; the software dimension includes improper acquisition parameter settings; the assembly dimension includes excessive gap between the motor and the Hall detection board and loose wiring; and the environmental dimension includes signal transmission line interference and fluctuation of test environment parameters.

[0028] The batch testing optimization described in S5 addresses common issues in sample testing by fine-tuning the default sampling frequency of the high-speed acquisition board, the common ratio of the multi-channel signal follower, and optimizing the assembly process of the motor and the Hall detection board.

[0029] A testing system for high-speed brushless variable frequency motor testing methods includes core functional modules and auxiliary testing equipment. The core functional modules include a high-speed acquisition board, a multi-channel signal follower, and a multi-channel I / O control module. The high-speed acquisition board supports software adjustment of acquisition parameters and has built-in data processing algorithms to automatically plot, calculate, and visualize the results. The multi-channel signal follower is used to amplify the signal driving capability and proportionally amplify or reduce the signal. The multi-channel I / O control module is configured with DI signals to monitor external conditions and DO signals to control system actions. The auxiliary testing equipment includes a thermal shock tester, an automatic optical inspection device, a dynamometer, an oscilloscope, a high-precision DC power supply, and a programmable high-power AC power supply, which are used for extreme temperature testing, optical inspection, torque detection, current wave measurement, and stable power supply, respectively.

[0030] The working principle of this invention is: With high-speed acquisition boards, multi-channel signal followers, and multi-channel IO control modules as core functional modules, and auxiliary equipment such as dynamometers and thermal shock testers, a dual-link testing system is constructed, consisting of "signal acquisition-conditioning-transmission-control" and "mechanical parameter detection-extreme environment simulation-stable power supply". Through precise mechanical coaxial connection and signal link docking, synchronous acquisition of electrical signals from the motor Hall detection board and mechanical parameters from the dynamometer is achieved. At the same time, through the DI / DO signal configuration of the IO module, the automated control of the testing process and external status monitoring are completed.

[0031] First, the validity of the collected raw data is verified, and invalid data such as interference and distortion are removed. The sampling accuracy is strictly verified (voltage error ≤ 0.001V, time axis accuracy ≤ 30ns). Then, through the system's built-in algorithm, the key parameters of the electrical signal are quantitatively analyzed, the synchronization matching of electrical and mechanical parameters is verified, and the data is processed in real time, automatically plotted, calculated and visualized, providing accurate data support for subsequent analysis.

[0032] After a single motor completes the full-process testing, based on the industry standard judgment results, non-conforming items are traced back to their source for rectification and retesting from four dimensions: hardware, software, assembly, and environment. For common problems of multiple sample motors, the test system parameters (such as sampling frequency and signal scaling ratio) and motor assembly process are optimized in reverse, and then batch testing is carried out to form a closed loop of "test-analysis-rectification-optimization-retesting", realizing bidirectional optimization of test methods and motor production processes.

[0033] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A testing method for a high-speed brushless variable frequency motor, characterized in that, The test system includes a high-speed acquisition board, a multi-channel signal follower, and a multi-channel IO control module. The test system is equipped with a thermal shock tester, a dynamometer, a high-precision DC power supply, and a programmable high-power AC power supply to form a test platform. It includes the following steps: S1. Mechanically connect the motor under test to the dynamometer, then perform a full-link connection and check of the signal link and power supply line, and then pre-start the test system under no-load to verify the linkage of the IO module and the effectiveness of the signal link; S2. Collect Hall effect electrical signals from the motor at different speeds in stages, simultaneously record the mechanical parameters detected by the dynamometer, adapt the collected parameters in real time, and simulate dynamic working conditions to complete continuous data acquisition; supplementary data acquisition is required in extreme environments to achieve full signal coverage detection and save all data in real time. S3. Verify the validity of the original data, quantitatively analyze the signal characteristics, conduct correlation analysis of electrical and mechanical parameters and adaptability analysis of the control system, and generate an analysis report; S4. Complete the judgment of individual and overall results according to industry standards, trace the source of non-conformities from multiple dimensions, and retest the entire process after processing the non-conformities. S5. For multiple motors, complete the entire process of sample testing, analyze common problems, optimize the test system parameters and motor assembly process, and finally conduct optimized batch testing.

2. The test method for a high-speed brushless variable frequency motor according to claim 1, characterized in that, The software parameter pre-tuning of the high-speed acquisition board in S1 includes adjusting the acquisition time, number of samples, and sampling frequency according to the model and rated speed of the motor under test; the debugging of the multi-channel signal follower includes setting the signal amplification or reduction ratio to match the signal detection requirements of the motor under test; the signal configuration of the multi-channel IO control module includes configuring the DI signal to start the test and the external monitoring signal sensed by the sensor, and configuring the DO signal to bind the relay on / off and the system control action of the cylinder action.

3. The test method for a high-speed brushless variable frequency motor according to claim 1, characterized in that, The mechanical connection described in S1 involves coaxially connecting and fixing the output shaft of the motor under test to the dynamometer, with the dynamometer set to torque detection mode. The signal link connection involves connecting the signal output of the Hall effect sensor board to the input of a multi-channel signal follower, connecting the output of the follower to the receiver of a high-speed acquisition board, and connecting the multi-channel I / O control module to the test system host, the motor control terminal, and the dynamometer circuit, respectively. The signal link validity verification involves confirming no signal loss or interference when the motor is running at low speed under no-load, ensuring that the conditioned signal is in a preset ratio to the original signal, and transmitting all data to the user terminal in real time.

4. The test method for a high-speed brushless variable frequency motor according to claim 1, characterized in that, The basic speed range acquisition described in S2 involves setting the speed in 5-8 gears according to the rated speed range of the motor under test, gradually increasing from low speed to high speed, and completing the synchronous acquisition of signals and mechanical parameters after 5 minutes of stable operation at each gear; the dynamic operating condition simulation acquisition involves setting dynamic operating modes such as motor acceleration and deceleration, constant speed with variable load, and frequent start and stop, with a continuous acquisition time of no less than 30 minutes. The test system processes the acquired data in real time, automatically plots and calculates, and visualizes the results to the user terminal; the full signal coverage detection is achieved by using a high-speed acquisition board to display motor parameters from point to surface in all dimensions, and the acquisition covers all output signal channels of the Hall detection board.

5. The test method for a high-speed brushless variable frequency motor according to claim 1, characterized in that, The original data validity verification in S3 involves removing invalid data with interference, distortion, and breakpoints, verifying that the voltage sampling error is ≤0.001V and the time axis labeling accuracy is ≤30ns. If the accuracy requirements are not met, the corresponding operating condition data is re-acquired. The quantitative analysis of signal characteristics involves analyzing the waveform, amplitude, frequency, and phase key parameters of the Hall detection board signal, comparing them with the design standard parameters, and labeling the deviation values. The correlation analysis of electrical and mechanical parameters involves verifying the synchronization and matching degree between the changes in motor speed and torque and the signal output of the Hall detection board.

6. The test method for a high-speed brushless variable frequency motor according to claim 1, characterized in that, The pass / fail criteria in S4 are: no deviation in signal parameters or deviation within the allowable range; synchronous matching of electrical and mechanical parameters; accurate identification and response of the control system to the Hall detection board signal; and signal stability under extreme conditions for extreme environment testing. The source of non-compliance issues is to locate the cause of the problem from four dimensions: hardware, software, assembly, and environment. The hardware dimension includes signal follower and acquisition board failure; the software dimension includes improper acquisition parameter settings; the assembly dimension includes excessive gap between the motor and the Hall detection board and loose wiring; and the environmental dimension includes signal transmission line interference and fluctuation of test environment parameters.

7. The test method for a high-speed brushless variable frequency motor according to claim 1, characterized in that, The batch testing optimization described in S5 addresses common issues in sample testing by fine-tuning the default sampling frequency of the high-speed acquisition board, the common ratio of the multi-channel signal follower, and optimizing the assembly process of the motor and the Hall detection board.

8. A test system for implementing the test method for high-speed brushless variable frequency motors according to any one of claims 1-7, characterized in that, The system includes core functional modules and auxiliary testing equipment. The core functional modules include a high-speed acquisition board, a multi-channel signal follower, and a multi-channel I / O control module. The high-speed acquisition board supports software adjustment of acquisition parameters and has built-in data processing algorithms to automatically plot, calculate, and visualize the results. The multi-channel signal follower is used to amplify the signal driving capability and proportionally amplify or reduce the signal. The multi-channel I / O control module is configured with DI signals to monitor external conditions and DO signals to control system actions. The auxiliary testing equipment includes a thermal shock tester, an automatic optical inspection device, a dynamometer, an oscilloscope, a high-precision DC power supply, and a programmable high-power AC power supply, which are used for extreme temperature testing, optical inspection, torque detection, current wave measurement, and stable power supply, respectively.

Images