A thermal protector maximum carrying current test system and test method

Abstract

The present application relates to the field of electronic technology, specifically, a kind of thermal protector maximum carrying current test system and test method, the system is obtained by the multiple test of thermal protector under constant temperature environment the maximum carrying current of each test of thermal protector, and the temperature adaptability of thermal protector is obtained by simulating each temperature environment, the protection performance evaluation coefficient of thermal protector is obtained by the trigger time length, recovery time length of each test of thermal protector, the working stability of thermal protector is further analyzed by the state parameters of thermal protector under the maximum carrying current, the voltage value, current value under each intensity electromagnetic radiation of thermal protector under the maximum carrying current are further analyzed to obtain voltage value, current value under each frequency electromagnetic radiation, and the anti-interference ability of thermal protector is further analyzed, the comprehensive performance evaluation index of thermal protector under the maximum carrying current is obtained by comprehensive analysis, the reliability of thermal protector under the maximum carrying current is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of electronic technology, and more specifically, to a test system and method for testing the maximum carrying current of a thermal protector. Background Technology

[0002] In modern electronic and electrical equipment, thermal protectors are crucial components for ensuring safe operation. As equipment becomes increasingly complex and diverse, the performance requirements for thermal protectors are also rising.

[0003] Current is one of the key factors affecting the working status of thermal protectors. Accurately understanding the maximum current carrying capacity of thermal protectors is crucial to ensuring the safe operation of equipment within the normal operating current range. If the maximum current carrying capacity is not clearly understood, it may lead to misjudgment in actual use, failure to protect equipment in a timely and effective manner, or even equipment failure, damage, or safety accidents. In-depth research and accurate testing of the maximum current carrying capacity of thermal protectors are an important foundation for promoting the continuous development of the electronics and electrical industry and ensuring the safe and stable operation of equipment.

[0004] The existing Chinese patent application number 202410846989.1 discloses a thermal protector maximum carrying current test system and test method and thermal protector. The solution controls the contactor to switch the circuit, monitors the current and time in real time, judges whether the action time and reset time are qualified, performs cyclic testing, and determines the fusing current and carrying current based on the number of cycles and failure conditions. The test can also be stopped at any time. It can accurately control and monitor parameters such as current and time to ensure the accuracy of test results.

[0005] However, the above-mentioned patent has the following problems: the solution tests the maximum current carrying capacity of the thermal protector, but does not analyze the performance of the thermal protector under the maximum current carrying capacity, such as temperature adaptability and working stability, which leads to an incomplete evaluation of the thermal protector's performance and a lack of accurate prediction of the thermal protector's performance in actual application scenarios. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, embodiments of the present invention provide a test system and method for testing the maximum carrying current of a thermal protector, which can effectively solve the problems involved in the prior art.

[0007] The objective of this invention can be achieved through the following technical solution: This invention provides a maximum carrying current testing system for a thermal protector, comprising: a maximum carrying current testing module, used to monitor the actual current value of the thermal protector at each monitoring time point under constant temperature conditions, determine whether the thermal protector has triggered an action, and obtain the maximum carrying current of the thermal protector in each test through multiple tests.

[0008] The operating current consistency analysis module is used to analyze the operating current consistency of the thermal protector based on the maximum carrying current of each test.

[0009] The temperature adaptability analysis module is used to simulate various temperature environments, test the maximum current carrying capacity of the thermal protector at each temperature, and then analyze the temperature adaptability of the thermal protector.

[0010] The protection performance evaluation module is used to monitor the trigger duration and recovery duration of each test of the thermal protector during the maximum carrying current test of the thermal protector, and analyze and obtain the protection performance evaluation coefficient of the thermal protector.

[0011] The status analysis module is used to obtain the status parameters of the thermal protector under the maximum carrying current, and then analyze the working stability of the thermal protector. The status parameters include the temperature compliance level and vibration frequency.

[0012] The anti-interference capability analysis module is used to obtain the voltage and current values ​​of the thermal protector under electromagnetic radiation of various intensities and frequencies under the maximum carrying current, and then analyze the anti-interference capability of the thermal protector.

[0013] The comprehensive analysis module is used to analyze the thermal protector's operating current consistency α, temperature adaptability β, protection performance evaluation coefficient γ, operating stability ε, and anti-interference capability ψ to obtain the comprehensive performance evaluation index of the thermal protector under the maximum carrying current, and then provide feedback.

[0014] The management database stores preset maximum allowable temperatures for thermal protectors.

[0015] Preferably, the present invention provides a method for testing the maximum carrying current of a thermal protector. The specific steps of the testing method are as follows: S1. Maximum carrying current test: Under constant temperature environment, the actual current value of the thermal protector at each monitoring time point is monitored to determine whether the thermal protector is triggered, and the maximum carrying current of the thermal protector in each test is obtained through multiple tests.

[0016] S2. Operating current consistency analysis: The consistency of the operating current of the thermal protector is obtained by analyzing the maximum carrying current of the thermal protector in each test.

[0017] S3. Temperature Adaptability Analysis: Simulate various temperature environments and test the maximum current carrying capacity of the thermal protector at each temperature to analyze the temperature adaptability of the thermal protector.

[0018] S4. Protection performance evaluation: During the maximum carrying current test of the thermal protector, the trigger duration and recovery duration of each test of the thermal protector are monitored, and the protection performance evaluation coefficient of the thermal protector is obtained by analysis.

[0019] S5. State Analysis: Obtain the state parameters of the thermal protector under the maximum carrying current, and then analyze the working stability of the thermal protector. The state parameters include the temperature compliance level and vibration frequency.

[0020] S6. Anti-interference capability analysis: Obtain the voltage and current values ​​of the thermal protector under electromagnetic radiation of various intensities and frequencies under the maximum carrying current, and then analyze the anti-interference capability of the thermal protector.

[0021] S7. Comprehensive Analysis: Based on the analysis of the thermal protector's operating current consistency, temperature adaptability, protection performance evaluation coefficient, working stability, and anti-interference capability, the comprehensive performance evaluation index of the thermal protector under the maximum carrying current is obtained and feedback is provided.

[0022] Compared to existing technologies, the embodiments of the present invention have at least the following advantages or beneficial effects: First, this system obtains the maximum carrying current of the thermal protector in each test under constant temperature conditions. Further analysis reveals the consistency of the thermal protector's operating current, improving the overall safety and stability of the equipment.

[0023] Second, this system tests the maximum carrying current of the thermal protector at various temperatures, and then analyzes the temperature adaptability of the thermal protector to ensure that the equipment can be effectively protected under different temperature conditions, and avoid the thermal protector from malfunctioning or failing to operate due to temperature changes.

[0024] Third, this system monitors the trigger duration and recovery duration of each test of the thermal protector during the maximum carrying current test, and analyzes the protection performance evaluation coefficient of the thermal protector. This allows for a comprehensive and quantitative assessment of the effectiveness of the thermal protector in protecting circuits and equipment.

[0025] Fourth, by acquiring the state parameters of the thermal protector under the maximum carrying current, this system can analyze the working stability of the thermal protector and gain a deeper understanding of the performance changes of the thermal protector under long-term or high-load working conditions. This ensures that the thermal protector continuously and reliably protects the circuit and will not malfunction or lose its protective function due to fluctuations in its own performance.

[0026] Fifth, this system obtains the voltage and current values ​​of the thermal protector under electromagnetic radiation of various intensities and frequencies at the maximum carrying current, and then analyzes the anti-interference capability of the thermal protector. This ensures that the thermal protector can still accurately perform current protection action in environments with electromagnetic interference, avoiding false action or failure to act due to electromagnetic interference, thereby improving the applicability of the thermal protector in complex electromagnetic environments.

[0027] VI. This system obtains the comprehensive performance evaluation index of the thermal protector under the maximum carrying current through comprehensive analysis and provides feedback, which is conducive to continuously improving the comprehensive performance of the thermal protector. At the same time, the feedback mechanism can also promote the continuous optimization of related work. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a module connection diagram of a thermal protector maximum carrying current testing system.

[0030] Figure 2 for Figure 1 A flowchart illustrating the maximum current carrying capacity test module.

[0031] Figure 3 This is a flowchart of a method for testing the maximum carrying current of a thermal protector. Detailed Implementation

[0032] 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 some embodiments of the present invention, and not all embodiments. 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.

[0033] Please see Figure 1 As shown, a maximum carrying current testing system for thermal protectors includes a maximum carrying current testing module, an operating current consistency analysis module, a temperature adaptability analysis module, a protection performance evaluation module, a status analysis module, an anti-interference capability analysis module, a comprehensive analysis module, and a management database.

[0034] The comprehensive analysis module is connected to the voltage change analysis module, status analysis module, maximum carrying current analysis module, action timeliness analysis module, anti-interference capability analysis module, environmental adaptability analysis module, and management database.

[0035] The maximum carrying current test module is used to monitor the actual current value of the thermal protector at each monitoring time point under constant temperature environment, determine whether the thermal protector has been triggered, and obtain the maximum carrying current of the thermal protector in each test through multiple tests.

[0036] Please see Figure 2 As shown, the specific analysis method of the maximum carrying current test module is as follows: First, the ambient temperature is set according to the set test environment temperature and controlled at a constant temperature. The initial current value of the thermal protector is adjusted to the set current value through an adjustable resistor, and the current value of the thermal protector is increased sequentially according to the set current difference. At the same time, several monitoring time points with equal time intervals are selected, and the actual current value of the thermal protector at each monitoring time point is obtained by using a current sensor. This allows for comprehensive and detailed acquisition of the thermal protector's response data under different current and constant temperature environments, which helps to gain a deeper understanding of its performance.

[0037] The second step is to determine if the actual current value of the thermal protector is 0 at a certain monitoring time point. Then, the thermal protector is determined to have triggered an action at that monitoring time point. The actual current value of the thermal protector at the previous monitoring time point corresponding to that monitoring time point is obtained and recorded as the maximum test carrying current of the thermal protector. Clarifying the method of determining the triggering action of the thermal protector can accurately lock the approximate value of its maximum carrying current, which is crucial for the performance evaluation of the thermal protector.

[0038] The third step involves conducting multiple tests on the thermal protector using the method for analyzing its maximum current carrying capacity. This yields the maximum current carrying capacity of the thermal protector for each test, and the average value is then used to obtain the maximum current carrying capacity of the thermal protector. This process improves the accuracy and stability of the assessment of the maximum current carrying capacity of the thermal protector, which helps ensure its reliability in practical applications.

[0039] The operating current consistency analysis module is used to analyze the operating current consistency of the thermal protector based on the maximum carrying current of each test.

[0040] The specific analysis method of the operating current consistency analysis module is as follows: read the maximum carrying current of the thermal protector in each test, and record it as... Where i represents the number of the i-th test, i = 1, 2, ..., n, substituting it into the formula Obtaining the consistency of the operating current α of the thermal protector, where n represents the number of tests, ensures reliable circuit disconnection under expected overload current conditions, avoiding untimely protection or malfunction due to fluctuations in the operating current.

[0041] The temperature adaptability analysis module is used to simulate various temperature environments, test the maximum current carrying capacity of the thermal protector at each temperature, and then analyze the temperature adaptability of the thermal protector.

[0042] The specific analysis method of the temperature adaptability analysis module is as follows: Simulate test environments according to a set temperature gradient, denoted as each temperature environment. Place the thermal protector in each temperature environment and operate accordingly. Analyze the maximum carrying current of the thermal protector at each temperature using the method for analyzing the maximum carrying current of the thermal protector in each test. Calculate the average value of these average values ​​to obtain the maximum carrying current of the thermal protector at each temperature, denoted as... m represents the number of the m-th temperature environment, where m = 1, 2, ..., q. Substituting this into the formula... The temperature adaptability β,q of the thermal protector represents the number of temperature environments; this helps to understand the adaptability of the thermal protector in various actual operating temperature ranges, ensuring that it can play a normal protective role in different thermal environments.

[0043] The protection performance evaluation module is used to monitor the trigger duration and recovery duration of each test of the thermal protector during the maximum carrying current test of the thermal protector, and analyze and obtain the protection performance evaluation coefficient of the thermal protector.

[0044] The specific analysis method of the protection performance evaluation module is as follows: First, monitor the time from the application of the maximum carrying current to the trigger action of the thermal protector during each test, and record it as the trigger time of each test of the thermal protector, denoted as T. i Substitute it into the formula Timeliness of thermal protector triggering ρ 触发 T0 represents the preset reference trigger duration, and n represents the number of tests; it can quantify the timeliness of the thermal protector's response to overload conditions, ensuring that the equipment can be protected in a timely manner when overloaded, thereby improving the safety and reliability of the equipment.

[0045] The second step involves selecting several time points at set time intervals after each test trigger action of the thermal protector, denoted as monitoring time points. The current at each monitoring time point is measured using an ammeter to obtain the current value of the thermal protector at each monitoring time point. This value is then compared with a preset low current threshold. When the current value of the thermal protector at a certain monitoring time point drops to the low current threshold, the time it takes for the thermal protector to automatically recover to its initial state is monitored to obtain the recovery time of the thermal protector for each test. The recovery timeliness of the thermal protector is analyzed using the same method as for analyzing the trigger timeliness of the thermal protector, and denoted as ρ. 恢复 This reflects the equipment's ability to recover quickly after a short-term failure, and helps to assess the thermal protector's response speed and continuous protection capability.

[0046] The third step is to improve the timeliness of the thermal protector's triggering. 触发 Timeliness of recovery 恢复 Substituting into the formula γ=ρ 触发 *φ1+ρ恢复 *φ2 yields the protection performance evaluation coefficient γ of the thermal protector, where φ1 and φ2 represent the preset trigger timeliness and recovery timeliness weighting factors, respectively. This can more accurately reflect the comprehensive effect of the key performance indicators of the thermal protector, ensuring the safety and reliability of the thermal protector in practical applications.

[0047] It should be noted that, in one specific embodiment, φ1 can be set to 0.6 and φ2 can be set to 0.4. The core function of the thermal protector is to prevent the protected equipment from being damaged due to overheating. For example, for large motors in industry, the internal temperature of the motor continuously rises during operation. Once the critical temperature is exceeded, the thermal protector must be triggered immediately to prevent the temperature from rising further. If the trigger is not timely, critical components of the motor, such as windings, may suffer irreversible damage in a very short time. This damage may lead to the scrapping of the entire motor, resulting in extremely high repair costs and affecting the production process. In contrast, timely recovery has more room for adjustment during equipment maintenance. If it is found that the thermal protector is not timely in its recovery, the reset mechanism of the thermal protector and related heat dissipation conditions can be checked during the regular maintenance of the equipment to improve the situation. Therefore, timely triggering has a higher weight.

[0048] The status analysis module is used to obtain the status parameters of the thermal protector under the maximum carrying current, and then analyze the working stability of the thermal protector. The status parameters include the temperature compliance level and vibration frequency.

[0049] The specific analysis method for the state parameters of the thermal protector under the maximum carrying current is as follows: First, select a set detection point on the thermal protector, and use a temperature sensor to detect the temperature at each time point during the operation of the thermal protector under the maximum carrying current. Obtain the temperature of the thermal protector at each time point under the maximum carrying current. Read the preset maximum allowable temperature of the thermal protector from the management database. By comparing the temperature of the thermal protector at each time point under the maximum carrying current with the preset maximum allowable temperature of the thermal protector, obtain the temperature qualification degree δ of the thermal protector under the maximum carrying current. This can ensure that the temperature of the thermal protector is within the safe allowable range, prevent equipment failure, damage or even safety risks caused by excessive temperature, and improve the safety and stability of equipment operation.

[0050] It should be noted that the specific analysis method for the temperature qualification of the thermal protector under the maximum carrying current is as follows: The temperature of the thermal protector at each time point under the maximum carrying current is recorded as follows: f represents the number of the f-th time point, f = 1, 2, ..., k. The preset maximum allowable temperature of the thermal protector is denoted as... Substitute it into the formula The temperature compliance δ of the thermal protector under the maximum carrying current is obtained, where k represents the number of time points.

[0051] The second step involves dividing the thermal protector's operation into several time periods, with each two adjacent time points representing a time period. Vibration sensors are used to count the number of vibrations at each detection point during the thermal protector's operation at the maximum current. This count yields the vibration frequency of the thermal protector at the maximum current, denoted as γ. This process helps to detect potential mechanical structural problems or loosening in advance, thereby ensuring the reliable operation of the thermal protector and related equipment.

[0052] It should be noted that the specific analysis method for the vibration frequency of the thermal protector under the maximum carrying current is as follows: read the number of vibrations of the thermal protector in each time period under the maximum carrying current, and record it as N. j Let j represent the number of the j-th time period, where j = 1, 2, ..., g. This can be determined using the formula... The vibration frequency γ of the thermal protector under the maximum carrying current is obtained, where t represents the duration of the time period and g represents the number of time periods.

[0053] The specific analysis method of the state analysis module is as follows: Read the temperature compliance level δ and vibration frequency γ of the thermal protector under the maximum carrying current, and substitute them into the formula. The operational stability ε of the thermal protector is obtained, where γ0 represents the preset reference vibration frequency. These represent the preset temperature compliance level and vibration frequency weighting factors, respectively; they help to promptly detect potential faults and take corresponding measures to ensure the normal operation of the system containing the thermal protector.

[0054] It should be noted that, in one specific embodiment, It can be set to 0.6. It can be set to 0.4. The control of the temperature compliance of the thermal protector is directly related to whether the protected equipment can operate in a suitable temperature environment, thus affecting the overall stability and service life of the equipment. Vibration frequency is not the core focus of its design and operation. As long as it is within a certain vibration tolerance range, the thermal protector can perform its temperature-based protection function normally. Therefore, the weight corresponding to the temperature compliance is higher.

[0055] The anti-interference capability analysis module is used to obtain the voltage and current values ​​of the thermal protector under electromagnetic radiation of various intensities and frequencies under the maximum carrying current, and then analyze the anti-interference capability of the thermal protector.

[0056] The specific analysis method of the anti-interference capability analysis module is as follows: Electromagnetic waves of different intensities and frequencies are set according to the parameters, denoted as electromagnetic radiation of various intensities and electromagnetic radiation of various frequencies. The thermal protector is radiated under its maximum carrying current using an electromagnetic radiation source. The voltage and current values ​​of the thermal protector under electromagnetic radiation of various intensities and frequencies are detected, obtaining the voltage and current values ​​of the thermal protector under electromagnetic radiation of various intensities and frequencies under its maximum carrying current. The voltage value of the thermal protector under electromagnetic radiation of various intensities under its maximum carrying current is denoted as V. p Let p represent the index of the p-th intensity, p = 1, 2, ..., l. The average voltage value of the thermal protector under the maximum carrying current is calculated by averaging, and denoted as . Substitute it into the formula The voltage fluctuation ξ of the thermal protector under various intensities of electromagnetic radiation at maximum carrying current is obtained. Vp Let l represent the intensity. Using the same method, we analyze the current fluctuation under different intensities of electromagnetic radiation, the voltage fluctuation under different frequencies of electromagnetic radiation, and the current fluctuation under the maximum carrying current of the thermal protector, denoted as ξ. Ip ξ Vs ξ Is s represents the number of the s-th frequency, s = 1, 2, ..., z, obtained through the formula The interference resistance ψ of the thermal protector is obtained. η1, η2, η3, and η4 represent the preset weighting factors for voltage fluctuation, current fluctuation, and voltage fluctuation and current fluctuation under different intensities of electromagnetic radiation and different frequencies of electromagnetic radiation, respectively. e represents the natural constant. This helps to determine the resistance of the thermal protector to electromagnetic interference under different electromagnetic environments and accurately assess the reliability of the thermal protector under different electromagnetic scenarios.

[0057] It should be noted that, in one specific embodiment, η1 can be set to 0.3, η2 can be set to 0.3, η3 can be set to 0.2, and η4 can be set to 0.2. Large voltage fluctuations caused by high-intensity electromagnetic radiation may directly affect the normal operating logic and performance of the thermal protector, making its anti-interference capability a critical test. Large fluctuations in current will also seriously interfere with the operation of the thermal protector, and the current is closely related to the heating of the thermal protector, which has a significant impact on stability. The weight of voltage and current fluctuations under different frequencies of electromagnetic radiation is relatively small. Different frequencies will also have some impact, but compared with the intensity factor, its impact may not be as direct and severe. Therefore, the weight of voltage and current fluctuations under different intensities of electromagnetic radiation is greater.

[0058] The comprehensive analysis module is used to analyze the thermal protector's operating current consistency α, temperature adaptability β, protection performance evaluation coefficient γ, operating stability ε, and anti-interference capability ψ to obtain the comprehensive performance evaluation index of the thermal protector under the maximum carrying current, and then provide feedback.

[0059] The specific analysis method of the comprehensive analysis module is as follows: The consistent operating current α, temperature adaptability β, protection performance evaluation coefficient γ, operational stability ε, and anti-interference capability ψ of the thermal protector are read and analyzed, and then substituted into the formula. Obtain the comprehensive performance evaluation index of the thermal protector under the maximum carrying current. Where w1, w2, w3, w4, and w5 represent the preset weighting factors for operating current consistency, temperature adaptability, protection performance evaluation coefficient, working stability, and anti-interference capability, respectively, and e represents the natural constant. The comprehensive performance evaluation index of the thermal protector under the maximum carrying current is compared with the preset comprehensive performance evaluation index threshold. If the comprehensive performance evaluation index of the thermal protector under the maximum carrying current is greater than or equal to the preset comprehensive performance evaluation index threshold, it means that the comprehensive performance evaluation index of the thermal protector under the maximum carrying current is qualified; otherwise, it means that the comprehensive performance evaluation index of the thermal protector under the maximum carrying current is unqualified, and feedback is sent to the system. This ensures that the thermal protector can effectively protect the circuit and equipment under the maximum carrying current, reduce the risk of overheating and failure, and thus improve the overall system safety.

[0060] It should be noted that, in one specific embodiment, w1 can be set to 0.2, w2 can be set to 0.2, w3 can be set to 0.4, w4 can be set to 0.1, and w5 can be set to 0.1. The consistency of the operating current is directly related to whether the thermal protector can operate accurately when the predetermined operating current is reached. If the consistency of the operating current is poor, the operating time of the thermal protector will be unstable under different individual conditions or different working conditions. The operating temperature range of the thermal protector is large, and it needs to maintain stable protection performance under different temperature environments. Protection performance is the core function of the thermal protector. It comprehensively reflects whether the thermal protector can effectively protect the circuit and equipment under various overload, short circuit and other abnormal current conditions. Working stability ensures the reliability of the thermal protector's performance during long-term operation. Although working stability is very important, it is related to indicators such as operating current consistency and protection performance to a certain extent. Anti-interference capability mainly refers to whether the thermal protector can work normally in the presence of external interference sources such as electromagnetic interference. In most conventional electrical environments, although there is a certain amount of electromagnetic interference, thermal protectors are generally designed with certain anti-interference measures. Furthermore, compared to other indicators such as operating current consistency and protection performance, anti-interference capability has a relatively small impact on the basic functions of thermal protectors. Therefore, the protection performance evaluation coefficient has a higher weight, followed by operating current consistency and temperature adaptability, while operating stability and anti-interference capability have lower weights.

[0061] The management database stores preset maximum allowable temperatures for thermal protectors.

[0062] Please see Figure 3 As shown, in addition, the present invention provides a method for testing the maximum carrying current of a thermal protector. The specific steps of the test method are as follows: S1. Maximum carrying current test: Under constant temperature environment, the actual current value of the thermal protector at each monitoring time point is monitored to determine whether the thermal protector is triggered, and the maximum carrying current of the thermal protector in each test is obtained through multiple tests.

[0063] S2. Operating current consistency analysis: The consistency of the operating current of the thermal protector is obtained by analyzing the maximum carrying current of the thermal protector in each test.

[0064] S3. Temperature Adaptability Analysis: Simulate various temperature environments and test the maximum current carrying capacity of the thermal protector at each temperature to analyze the temperature adaptability of the thermal protector.

[0065] S4. Protection performance evaluation: During the maximum carrying current test of the thermal protector, the trigger duration and recovery duration of each test of the thermal protector are monitored, and the protection performance evaluation coefficient of the thermal protector is obtained by analysis.

[0066] S5. State Analysis: Obtain the state parameters of the thermal protector under the maximum carrying current, and then analyze the working stability of the thermal protector. The state parameters include the temperature compliance level and vibration frequency.

[0067] S6. Anti-interference capability analysis: Obtain the voltage and current values ​​of the thermal protector under electromagnetic radiation of various intensities and frequencies under the maximum carrying current, and then analyze the anti-interference capability of the thermal protector.

[0068] S7. Comprehensive Analysis: Based on the analysis of the thermal protector's operating current consistency, temperature adaptability, protection performance evaluation coefficient, working stability, and anti-interference capability, the comprehensive performance evaluation index of the thermal protector under the maximum carrying current is obtained and feedback is provided.

[0069] This system obtains the maximum carrying current of the thermal protector under constant temperature conditions through multiple tests, simulates various temperature environments to determine the temperature adaptability of the thermal protector, obtains the protection performance evaluation coefficient of the thermal protector by measuring the trigger duration and recovery duration of each test, analyzes the working stability of the thermal protector by analyzing the state parameters of the thermal protector under the maximum carrying current, and obtains the voltage and current values ​​of the thermal protector under electromagnetic radiation of various intensities and frequencies under the maximum carrying current to analyze the anti-interference capability of the thermal protector. Through comprehensive analysis, the system obtains the comprehensive performance evaluation index of the thermal protector under the maximum carrying current, ensuring the reliability of the thermal protector under the maximum carrying current.

[0070] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which are still covered within the protection scope of the present invention.

Claims

1. A system for testing the maximum carrying current of a thermal protector, characterized in that, The system specifically includes the following modules: The maximum carrying current test module is used to monitor the actual current value of the thermal protector at each monitoring time point under constant temperature environment, determine whether the thermal protector has been triggered, and obtain the maximum carrying current of the thermal protector in each test through multiple tests. The operating current consistency analysis module is used to analyze the operating current consistency of the thermal protector based on the maximum carrying current of the thermal protector in each test. The temperature adaptability analysis module is used to simulate various temperature environments, test the maximum current carrying capacity of the thermal protector at each temperature, and then analyze the temperature adaptability of the thermal protector. The protection performance evaluation module is used to monitor the trigger duration and recovery duration of each test of the thermal protector during the maximum carrying current test of the thermal protector, and analyze and obtain the protection performance evaluation coefficient of the thermal protector. The status analysis module is used to obtain the status parameters of the thermal protector under the maximum carrying current, and then analyze the working stability of the thermal protector. The status parameters include the temperature compliance level and vibration frequency. The anti-interference capability analysis module is used to obtain the voltage and current values ​​of the thermal protector under electromagnetic radiation of various intensities and frequencies under the maximum carrying current, and then analyze the anti-interference capability of the thermal protector. The comprehensive analysis module is used to analyze the consistency of the operating current of the thermal protector. Temperature adaptability Protection performance evaluation coefficient Job stability Anti-interference capability The comprehensive performance evaluation index of the thermal protector under the maximum carrying current was obtained through analysis and feedback was provided. A management database is used to store preset maximum allowable temperatures for thermal protectors; The specific analysis method for the state parameters of the thermal protector under the maximum carrying current is as follows: The first step involves selecting designated detection points on the thermal protector. Temperature sensors are used to monitor the temperature at each detection point during the thermal protector's operation at its maximum current carrying capacity. The preset maximum allowable temperature for the thermal protector under maximum current carrying capacity is then retrieved from the management database. By comparing the temperatures at each time point under maximum current carrying capacity with the preset maximum allowable temperature, the degree of temperature compliance of the thermal protector under maximum current carrying capacity is determined. ; The second step involves dividing the thermal protector's operation into several time periods, with each two adjacent time points considered as a time interval. Vibration sensors are used to count the vibration frequency at each detection point during the thermal protector's operation at the maximum current. This count, recorded as , yields the vibration frequency of the thermal protector at the maximum current. ; According to the temperature compliance of the thermal protector under the maximum carrying current Vibration frequency To achieve the working stability of the thermal protector .

2. The thermal protector maximum carrying current testing system according to claim 1, characterized in that: The specific analysis method for the maximum current carrying capacity test module is as follows: The first step is to set the ambient temperature according to the settings and keep the ambient temperature constant. The initial current value of the thermal protector is adjusted to the set current value through the adjustable resistor, and the current value of the thermal protector is increased sequentially according to the set current difference. At the same time, several monitoring time points with equal time intervals are selected, and the actual current value of the thermal protector at each monitoring time point is obtained by using a current sensor. The second step is to determine that the thermal protector has triggered an action at a certain monitoring time point if the actual current value of the thermal protector at a certain monitoring time point is 0. The actual current value of the thermal protector at the previous monitoring time point corresponding to the current monitoring time point is obtained and recorded as the maximum test carrying current of the thermal protector. The third step is to conduct multiple tests on the thermal protector according to the method for analyzing the maximum carrying current of the thermal protector, obtain the maximum carrying current of the thermal protector in each test, and obtain the maximum carrying current of the thermal protector by averaging the values.

3. The maximum carrying current testing system for a thermal protector according to claim 2, characterized in that: The specific analysis method of the operating current consistency analysis module is as follows: Read the maximum current carrying capacity of the thermal protector during each test, and record it as... ,in Indicates the first The test number, Substitute it into the formula To obtain the consistency of the operating current of the thermal protector , Indicates the number of tests.

4. The maximum carrying current testing system for a thermal protector according to claim 3, characterized in that: The specific analysis method of the temperature adaptability analysis module is as follows: The test environment was simulated according to the set temperature gradient, denoted as each temperature environment. The thermal protector was then placed in each temperature environment and operated accordingly. Following the method for analyzing the maximum carrying current of the thermal protector, the maximum carrying current of the thermal protector in each test at each temperature was obtained. The average value of these average values ​​was then used to obtain the maximum carrying current of the thermal protector at each temperature, denoted as . , Indicates the first The number of each temperature environment. Substitute it into the formula Temperature adaptability of thermal protector , This indicates the number of temperature environments.

5. The maximum carrying current testing system for a thermal protector according to claim 1, characterized in that: The specific analysis method of the protection performance evaluation module is as follows: The first step is to monitor the time from the application of the maximum carrying current to the triggering action of the thermal protector during each test, and record this as the triggering time of the thermal protector for each test. Substitute it into the formula Timely triggering of thermal protector , This indicates the preset reference trigger duration. Indicates the number of tests; The second step involves selecting several time points at set time intervals after each test trigger action of the thermal protector, denoted as monitoring time points. The current at each monitoring time point is measured using an ammeter to obtain the current value of the thermal protector at each monitoring time point. This value is then compared with a preset low current threshold. When the current value of the thermal protector at a certain monitoring time point drops to the low current threshold, the time it takes for the thermal protector to automatically recover to its initial state is monitored to obtain the recovery time of the thermal protector for each test. The recovery timeliness of the thermal protector is analyzed using the same method as for analyzing the trigger timeliness of the thermal protector, and denoted as... ; The third step is to ensure the timely triggering of the thermal protector. Timeliness of recovery Substitute into the formula Obtain the protection performance evaluation coefficient of the thermal protector. , These represent the preset weighting factors for trigger timeliness and recovery timeliness, respectively.

6. The maximum carrying current testing system for a thermal protector according to claim 1, characterized in that: The specific analysis method of the state analysis module is as follows: Read the temperature compliance of the thermal protector under the maximum carrying current. Vibration frequency Substitute it into the formula To achieve the working stability of the thermal protector ,in This indicates the preset reference vibration frequency. These represent the weighting factors for the preset temperature compliance level and vibration frequency, respectively.

7. The maximum carrying current testing system for a thermal protector according to claim 1, characterized in that: The specific analysis method of the anti-interference capability analysis module is as follows: Electromagnetic waves of different intensities and frequencies are set according to the specifications, denoted as electromagnetic radiation of various intensities and electromagnetic radiation of various frequencies. The thermal protector is radiated through an electromagnetic radiation source at its maximum carrying current. The voltage and current values ​​of the thermal protector under electromagnetic radiation of various intensities and frequencies are detected, obtaining the voltage and current values ​​of the thermal protector under electromagnetic radiation of various intensities and frequencies at its maximum carrying current. The voltage value of the thermal protector under electromagnetic radiation of various intensities at its maximum carrying current is denoted as... , Indicates the first The strength number, The average voltage value of the thermal protector under the maximum carrying current is obtained by averaging, and is denoted as . Substitute it into the formula The voltage fluctuation of the thermal protector under various intensities of electromagnetic radiation at maximum carrying current was obtained. , The intensity is represented by the following values. Using the same method, the current fluctuation under different intensities of electromagnetic radiation, the voltage fluctuation under different frequencies of electromagnetic radiation, and the current fluctuation under the maximum carrying current of the thermal protector are analyzed and denoted as follows: , Indicates the first The frequency number, Through formula Obtain the anti-interference capability of the thermal protector , These represent the weighting factors for voltage and current fluctuations under different intensities of electromagnetic radiation, and for voltage and current fluctuations under different frequencies of electromagnetic radiation. Represents the natural constant.

8. The maximum carrying current testing system for a thermal protector according to claim 1, characterized in that: The specific analysis method of the comprehensive analysis module is as follows: Read the consistency of the operating current of the thermal protector separately Temperature adaptability Protection performance evaluation coefficient Job stability Anti-interference capability Analyze and substitute it into the formula Obtain the comprehensive performance evaluation index of the thermal protector under the maximum carrying current. ,in These represent the weighting factors for preset operating current consistency, temperature adaptability, protection performance evaluation coefficient, operational stability, and anti-interference capability, respectively. This represents a natural constant. The comprehensive performance evaluation index of the thermal protector under the maximum carrying current is compared with the preset comprehensive performance evaluation index threshold. If the comprehensive performance evaluation index of the thermal protector under the maximum carrying current is greater than or equal to the preset comprehensive performance evaluation index threshold, it means that the comprehensive performance evaluation index of the thermal protector under the maximum carrying current is qualified. Otherwise, it means that the comprehensive performance evaluation index of the thermal protector under the maximum carrying current is unqualified, and feedback is sent to the system.

9. A method for testing the maximum carrying current of a thermal protector, comprising the following steps performed using the thermal protector maximum carrying current testing system as described in any one of claims 1-8, characterized in that, The specific steps of this testing method are as follows: S1. Maximum carrying current test: Under constant temperature environment, monitor the actual current value of the thermal protector at each monitoring time point to determine whether the thermal protector is triggered, and obtain the maximum carrying current of the thermal protector in each test through multiple tests. S2. Consistency analysis of operating current: The consistency of the operating current of the thermal protector is obtained by analyzing the maximum carrying current of the thermal protector in each test. S3. Temperature Adaptability Analysis: Simulate various temperature environments and test the maximum current carrying capacity of the thermal protector at each temperature to analyze the temperature adaptability of the thermal protector. S4. Protection performance evaluation: During the maximum carrying current test of the thermal protector, the trigger duration and recovery duration of each test of the thermal protector are monitored, and the protection performance evaluation coefficient of the thermal protector is obtained by analysis. S5. State Analysis: Obtain the state parameters of the thermal protector under the maximum carrying current, and then analyze the working stability of the thermal protector. The state parameters include the temperature compliance level and vibration frequency. S6. Anti-interference capability analysis: Obtain the voltage and current values ​​of the thermal protector under electromagnetic radiation of various intensities and frequencies under the maximum carrying current, and then analyze the anti-interference capability of the thermal protector. S7. Comprehensive Analysis: Based on the analysis of the thermal protector's operating current consistency, temperature adaptability, protection performance evaluation coefficient, working stability, and anti-interference capability, the comprehensive performance evaluation index of the thermal protector under the maximum carrying current is obtained and feedback is provided.

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