Insulation withstand voltage self-adaptive pressure tool test system suitable for IGBT (Insulated Gate Bipolar Translator)

Abstract

The invention provides a self-adaptive pressure tool test system suitable for insulated gate bipolar transistor (IGBT) insulation voltage resistance. The system comprises a hardware structure, the hardware structure comprises an upper quick-change jig and a lower quick-change jig which are used for fixing and positioning a tested module, the position of the module is ensured to be accurate and stable in the testing process through an indexing pin and a spring mechanism, a servo electric cylinder is used for driving an electric cylinder push plate, and the servo electric cylinder is used for driving the electric cylinder push plate. Accurate displacement of the upper quick-change jig is achieved, and displacement control of the servo electric cylinder is based on an optimized displacement formula. The adaptive pressure tool test system suitable for IGBT insulation and voltage withstanding has adaptive pressure adjustment and dynamic compensation capabilities, can effectively solve the problem of test errors caused by external factors in a traditional test system, and improves the test efficiency. Multi-element feedback of a servo electric cylinder, a pressure sensor, a temperature sensor and a vibration sensor is combined.

Description

Technical Field

[0001] The invention relates to the technical field of self-adaptive pressure tool testing, in particular to a self-adaptive pressure tool testing system suitable for IGBT insulation withstand voltage. Background Art

[0002] The IGBT insulation withstand voltage adaptive pressure fixture test system consists of an upper quick-change fixture and a lower quick-change fixture. The upper quick-change fixture includes an upper insulation withstand voltage test head, a threaded pad, an insulation withstand voltage pressure column, etc., which are used to ensure the stability and precise positioning of the upper test module; the lower quick-change fixture includes an insulating support plate, a fixed handle, etc., which provide lower support and positioning accuracy. The upper quick-change fixture is driven by a servo electric cylinder to move in the vertical direction so that the test head contacts the module under test for insulation withstand voltage testing. The system is uniformly controlled by a controller to achieve precise positioning and automated testing. The pressure sensor records the test pressure to ensure stable contact between the test head and the module, while ensuring safety and test accuracy through multiple sets of sensors.

[0003] Although the system has the advantages of automation and accurate testing, it also has some disadvantages. Although the system has a high degree of automation, it is affected by external factors, such as errors caused by temperature or vibration, which leads to unstable testing. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an adaptive pressure tooling test system for IGBT insulation withstand voltage, which solves the problem of unstable testing caused by errors caused by external factors such as temperature or vibration.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A self-adaptive pressure fixture test system for IGBT insulation withstand voltage, comprising: a hardware structure, the hardware structure comprising an upper quick-change fixture and a lower quick-change fixture for fixing and positioning the module under test, and ensuring the accurate and stable position of the module during the test process through an indexing pin and a spring mechanism;

[0006] The servo electric cylinder is used to drive the electric cylinder push plate to achieve precise displacement of the upper quick-change fixture. The displacement control of the servo electric cylinder is based on the optimized displacement formula Ensure that the pressure between the test head and the module under test is applied accurately;

[0007] The pressure sensor system is used to detect the applied pressure in real time and make adaptive adjustments through a closed-loop control feedback mechanism to ensure the accuracy of the applied pressure;

[0008] Environmental sensor system, including temperature sensor and vibration sensor, monitors the changes of external environment in real time and provides data support for dynamic compensation;

[0009] An adaptive pressure regulation model, wherein the adaptive pressure regulation model adopts the formula:

[0010] F(t)=F0+k1·ΔT+k2·a

[0011] Among them: F0 is the initial set pressure, ΔT is the ambient temperature change, a is the vibration acceleration. Through this model, the compensation pressure is calculated according to the real-time changes of external temperature and vibration data;

[0012] Closed-loop control and dynamic compensation system, the closed-loop control system is based on PID control algorithm:

[0013]

[0014] The error between the actual pressure and the set pressure is reduced by the dynamic compensation part based on the data provided by the environmental sensor, combined with the formula:

[0015] P 补偿 =f(ΔT,a)

[0016] Real-time adjustment of the control input of the servo electric cylinder to ensure test stability under vibration or temperature fluctuations;

[0017] The environmental monitoring and abnormal correction module records the temperature and vibration parameters in real time and sends the error information to the user when the temperature fluctuation exceeds the set threshold ΔT. max Or vibration acceleration a max When the standard is exceeded, the abnormal correction model E(t) = α·e(t) is automatically triggered, and the pressure is dynamically adjusted according to the feedback, or the test is suspended when necessary to avoid equipment damage or test errors.

[0018] Preferably, the pressure compensation coefficients k1 and k2 in the adaptive pressure regulation model are obtained through experimental calibration to ensure the pressure automatic regulation accuracy of the system under different temperature and vibration conditions. The servo electric cylinder is controlled by the optimized displacement control equation Control the motion trajectory to ensure precise displacement under different pressure requirements.

[0019] Preferably, the pressure sensor system uses the feedback formula F 反馈 (t) = P0 + ΔP(t) measures pressure in real time and dynamically corrects PID control parameters based on historical data to improve the accuracy of pressure application.

[0020] Preferably, the closed-loop control system uses a PID control formula to adjust the applied force of the servo electric cylinder based on real-time pressure feedback data to ensure that the pressure error e(t) is within a set threshold range.

[0021] Preferably, it further includes an environmental monitoring data storage module, which evaluates the long-term impact of external environmental changes on test results through data analysis and optimizes the pressure compensation formula. The environmental monitoring module uses a statistical model The sensor data is filtered to remove noise in temperature and vibration detection to ensure the accuracy of environmental monitoring.

[0022] Preferably, it further includes a dynamic compensation module, which uses a self-learning algorithm to automatically adjust the compensation coefficients k1 and k2 through gradually accumulated test data to improve the system's adaptability to different environmental changes. The abnormal correction module is based on a dynamic threshold model. When abnormal temperature fluctuations or vibrations are detected, it automatically adjusts the working state of the servo electric cylinder to ensure the safety of the system during high-voltage testing.

[0023] Preferably, it further includes a data regression module, which calculates the impact of environmental changes on long-term test data through regression analysis and dynamically optimizes the compensation formula in the test system.

[0024] Preferably, the PID control can automatically adjust PID parameters through the Bayesian optimization algorithm according to historical test data to improve test stability and control accuracy. The monitoring data of the vibration sensor analyzes the environmental vibration frequency through Fourier transform to ensure that high-frequency vibration does not interfere with the system test accuracy and triggers automatic pause of the test in the case of excessive vibration.

[0025] The present invention provides an adaptive pressure tooling test system suitable for IGBT insulation withstand voltage, which has the following beneficial effects:

[0026] This is an adaptive pressure tooling test system for IGBT insulation withstand voltage. It has adaptive pressure adjustment and dynamic compensation capabilities, and can effectively solve the test error problem caused by external factors in traditional test systems. By combining the multi-factor feedback of servo electric cylinders, pressure sensors, temperature and vibration sensors, the system can monitor and adaptively adjust the pressure applied during the test in real time to ensure the stability and accuracy of the test. The closed-loop control system is based on the PID control algorithm to dynamically reduce the error between the actual pressure and the set pressure, so that the system can maintain high-precision pressure application under different environmental conditions, avoiding the test instability that occurs in traditional systems under complex environments.

[0027] The innovation of this system is also reflected in its environmental monitoring and abnormal correction module, which can record and analyze external temperature and vibration parameters in real time. When abnormal fluctuations exceeding the set threshold are detected, the system can automatically adjust the test parameters or suspend the test in time to ensure the safety and reliability of the equipment and test results. Through self-learning algorithms and historical data analysis, the system can also continuously optimize the compensation model so that it can automatically adjust the pressure compensation coefficient according to different module types and long-term environmental changes, ensuring consistent high-precision testing under different IGBT modules and test conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is another overall structural schematic diagram of the present invention;

[0030] Figure 3 For the present invention Figure 1 A schematic diagram of the enlarged structure in the middle.

[0031] Among them, 1. Upper quick-change fixture; 2. Lower quick-change fixture; 3. Indexing pin; 4. Servo electric cylinder; 5. Drive electric cylinder push plate; 6. Test head. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1-3 As shown, an embodiment of the present invention provides an IGBT insulation withstand voltage adaptive pressure tooling test system, including a hardware structure, the hardware structure includes an upper quick-change fixture 1 and a lower quick-change fixture 2 for fixing and positioning the module under test, and the indexing pin 3 and the spring mechanism are used to ensure the accurate and stable position of the module during the test.

[0034] The servo electric cylinder 4 is used to drive the electric cylinder push plate 5 to achieve precise displacement of the upper quick-change fixture 1. The displacement control of the servo electric cylinder 4 is based on the optimized displacement formula Ensure that the pressure between the test head 6 and the module under test is applied accurately.

[0035] The pressure sensor system is used to detect the applied pressure in real time and make adaptive adjustments through the closed-loop control feedback mechanism to ensure the accuracy of the applied pressure. The pressure sensor system uses the feedback formula F 反馈(t) = P0 + ΔP(t) measures pressure in real time and dynamically corrects PID control parameters based on historical data to improve the accuracy of pressure application.

[0036] The environmental sensor system, including temperature sensors and vibration sensors, monitors changes in the external environment in real time and provides data support for dynamic compensation.

[0037] Adaptive pressure regulation model,The adaptive pressure regulation model adopts the formula:

[0038] F(t)=F0+k1·ΔT+k2·a

[0039] Among them: F0 is the initial set pressure, ΔT is the ambient temperature change, a is the vibration acceleration. Through this model, the compensation pressure is calculated according to the real-time changes of external temperature and vibration data. The pressure compensation coefficients k1 and k2 in the adaptive pressure regulation model are obtained through experimental calibration to ensure the pressure automatic regulation accuracy of the system under different temperature and vibration conditions. The servo electric cylinder 4 is controlled by the optimized displacement equation Control the motion trajectory to ensure precise displacement under different pressure requirements. The pressure compensation coefficients k1 and k2 in the adaptive pressure regulation model are obtained through experimental calibration. During the experimental calibration process, the system collects pressure data by applying different temperature and vibration conditions, and determines the optimal coefficient value through regression analysis to ensure the pressure regulation accuracy of the system under different temperature and vibration conditions.

[0040] Closed-loop control and dynamic compensation system, the closed-loop control system is based on PID control algorithm:

[0041]

[0042] The error between the actual pressure and the set pressure is reduced by the dynamic compensation part based on the data provided by the environmental sensor, combined with the formula:

[0043] P 补偿 =f(ΔT,a)

[0044] The control input of the servo electric cylinder 4 is adjusted in real time to ensure the test stability under vibration or temperature fluctuation. The closed-loop control system uses the PID control formula to adjust the applied force of the servo electric cylinder 4 based on the real-time pressure feedback data to ensure that the pressure error e(t) is within the set threshold range.

[0045] Environmental monitoring and abnormal correction module, the environmental monitoring module and the abnormal correction module record the temperature and vibration parameters in real time, when the temperature fluctuation exceeds the set threshold ΔT max Or vibration acceleration a maxWhen the standard is exceeded, the abnormal correction model E(t) = α·e(t) is automatically triggered, and the pressure is dynamically adjusted according to the feedback, or the test is suspended when necessary to avoid equipment damage or test errors. It further includes an environmental monitoring data storage module, which evaluates the long-term impact of external environmental changes on test results through data analysis and optimizes the pressure compensation formula. The environmental monitoring module uses a statistical model The sensor data is filtered to remove noise in temperature and vibration detection to ensure the accuracy of environmental monitoring. It further includes a dynamic compensation module, which uses a self-learning algorithm to automatically adjust the compensation coefficients k1 and k2 through gradually accumulated test data to improve the system's adaptability to different environmental changes. The abnormal correction module is based on a dynamic threshold model. When abnormal temperature fluctuations or vibrations are detected, the servo electric cylinder 4 is automatically adjusted to ensure the safety of the system during high-voltage testing. It further includes a data regression module, which calculates the impact of environmental changes on long-term test data through regression analysis and dynamically optimizes the compensation formula in the test system. PID control can automatically adjust PID parameters through the Bayesian optimization algorithm based on historical test data to improve test stability and control accuracy. The monitoring data of the vibration sensor analyzes the environmental vibration frequency through Fourier transform to ensure that high-frequency vibration does not interfere with the system test accuracy and triggers automatic pause of the test in the case of excessive vibration.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-adaptive pressure tooling test system for IGBT insulation withstand voltage, characterized in that: include: A hardware structure, the hardware structure comprising an upper quick-change fixture (1) and a lower quick-change fixture (2) for fixing and positioning the module under test, and ensuring the accurate and stable position of the module during the test process through an indexing pin (3) and a spring mechanism; The servo electric cylinder (4) is used to drive the electric cylinder push plate (5) to achieve accurate displacement of the upper quick-change fixture (1). The displacement control of the servo electric cylinder (4) is based on an optimized displacement formula. Ensure that the pressure between the test head (6) and the module under test is applied accurately; The pressure sensor system is used to detect the applied pressure in real time and make adaptive adjustments through a closed-loop control feedback mechanism to ensure the accuracy of the applied pressure; Environmental sensor system, including temperature sensor and vibration sensor, monitors the changes of external environment in real time and provides data support for dynamic compensation; An adaptive pressure regulation model, wherein the adaptive pressure regulation model adopts the formula: F(t)=F0+k1·ΔT+k2·a Among them: F0 is the initial set pressure, ΔT is the ambient temperature change, a is the vibration acceleration. Through this model, the compensation pressure is calculated according to the real-time changes of external temperature and vibration data; Closed-loop control and dynamic compensation system, the closed-loop control system is based on PID control algorithm: The error between the actual pressure and the set pressure is reduced by the dynamic compensation part based on the data provided by the environmental sensor, combined with the formula: P 补偿 =f(ΔT,a) Adjust the control input of the servo electric cylinder (4) in real time to ensure the test stability under vibration or temperature fluctuation; The environmental monitoring and abnormal correction module records the temperature and vibration parameters in real time and sends the error information to the user when the temperature fluctuation exceeds the set threshold ΔT. max Or vibration acceleration a max When the standard is exceeded, the abnormal correction model E(t) = α·e(t) is automatically triggered, and the pressure is dynamically adjusted according to the feedback, or the test is suspended when necessary to avoid equipment damage or test errors.

2. The self-adaptive pressure tooling test system for IGBT insulation withstand voltage according to claim 1, characterized in that: The pressure compensation coefficients k1 and k2 in the adaptive pressure regulation model are obtained through experimental calibration to ensure the pressure automatic regulation accuracy of the system under different temperature and vibration conditions. The servo electric cylinder (4) is controlled by the optimized displacement control equation Control the motion trajectory to ensure precise displacement under different pressure requirements.

3. The self-adaptive pressure tooling test system for IGBT insulation withstand voltage according to claim 1, characterized in that: The pressure sensor system is fed back by the formula F 反馈 (t) = P0 + ΔP(t) measures pressure in real time and dynamically modifies PID control parameters based on historical data to improve the accuracy of pressure application.

4. The self-adaptive pressure tooling test system for IGBT insulation withstand voltage according to claim 1, characterized in that: The closed-loop control system uses a PID control formula to adjust the applied force of the servo electric cylinder (4) based on real-time pressure feedback data to ensure that the pressure error e(t) is within a set threshold range.

5. The self-adaptive pressure tooling test system for IGBT insulation withstand voltage according to claim 1, characterized in that: It further includes an environmental monitoring data storage module, which evaluates the long-term impact of external environmental changes on test results through data analysis and optimizes the pressure compensation formula. The environmental monitoring module uses a statistical model The sensor data is filtered to remove noise in temperature and vibration detection to ensure the accuracy of environmental monitoring.

6. The self-adaptive pressure tooling test system for IGBT insulation withstand voltage according to claim 1, characterized in that: It further comprises a dynamic compensation module, which uses a self-learning algorithm to automatically adjust the compensation coefficients k1 and k2 through gradually accumulated test data to improve the adaptability of the system to different environmental changes. The abnormal correction module is based on a dynamic threshold model and automatically adjusts the working state of the servo electric cylinder (4) when abnormal temperature fluctuations or vibrations are detected to ensure the safety of the system during high-voltage testing.

7. The self-adaptive pressure tooling test system for IGBT insulation withstand voltage according to claim 1, characterized in that: It further includes a data regression module, which calculates the impact of environmental changes on long-term test data through regression analysis and dynamically optimizes compensation formulas in the test system.

8. The self-adaptive pressure tooling test system for IGBT insulation withstand voltage according to claim 1, characterized in that: The PID control can automatically adjust PID parameters through the Bayesian optimization algorithm according to historical test data to improve test stability and control accuracy. The monitoring data of the vibration sensor analyzes the environmental vibration frequency through Fourier transform to ensure that high-frequency vibration does not interfere with the system test accuracy and triggers automatic suspension of the test in the case of excessive vibration.

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