High-durability high-voltage cost control primary and secondary fusion device

Abstract

The invention discloses a high-durability high-voltage cost control primary and secondary fusion device. The device comprises a device shell, a permanent magnet module, a magnetic circuit compensation module, a heat dissipation module, a reliability evaluation module, a cooperative control module and the like, the permanent magnet module is made of an NdFeB material, is reinforced by a dysprosium grain boundary diffusion process and is coated with a permalloy magnetic shielding layer; the magnetic circuit compensation module performs closed-loop regulation on a reverse magnetic field; the heat dissipation module integrates a passive heat dissipation assembly and an active heat dissipation assembly. The reliability evaluation module predicts the life in combination with a Weibull model and a machine learning algorithm; and the cooperative control device performs linkage control on each module according to the temperature, the magnetic field and the life threshold. The problems of magnetic flux attenuation, out-of-control temperature rise, life prediction and the like of a traditional device under the severe working condition are effectively solved, and the stability and durability of the device under the severe environment are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage electrical equipment, and more specifically, it relates to a highly durable high-voltage fee control device suitable for harsh working conditions. Background Art

[0002] Traditional primary-secondary integrated high-voltage fee control devices play a key boundary control function in the power system, but the reliability problems under harsh working conditions such as high temperature and strong magnetic field have long existed.

[0003] In the prior art, the permanent magnet structure has the advantages of stable performance and maintenance-free, but its working stability and durability are easily interfered by high-temperature and strong magnetic field environments. How to improve the working stability of the permanent magnet switch in harsh environments is the main difficulty to be solved by the present invention. On this basis, the present invention provides a high-voltage fee control device integrating material optimization, dynamic compensation, intelligent heat dissipation and accurate life prediction to systematically solve the reliability problems under harsh working conditions. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention aims to provide a highly durable primary-secondary integrated high-voltage fee control device, which effectively solves problems such as flux decay, out-of-control temperature rise and life prediction of traditional devices under harsh working conditions, and significantly improves the stability and durability of the device in harsh environments.

[0005] To achieve the above object, the present invention provides the following technical solution: A highly durable primary-secondary integrated high-voltage fee control device, including a device housing, and provided inside the device housing are:

[0006] A permanent magnet module, made of a high coercivity permanent magnet material and provided with a magnetic shielding layer on the outside, for providing a stable magnetic field drive in high-temperature and strong magnetic field environments;

[0007] A magnetic circuit compensation module, which adjusts the magnetic field distribution in real time through a closed-loop control logic, for offsetting the flux decay caused by external environmental interference;

[0008] A heat dissipation module, integrating passive heat dissipation components and active heat dissipation components, for suppressing the temperature rise inside the device;

[0009] A reliability evaluation module, dynamically predicting the device life based on operation data and fault models;

[0010] A cooperative control device, connecting the above modules and performing cooperative control, including:

[0011] When the temperature exceeds the preset threshold, triggering the maximum current mode of the compensation winding and the full-speed operation of the cooling fan;

[0012] When the external magnetic field strength is greater than the preset threshold, preferentially enhancing the magnetic shielding efficiency and dynamically adjusting the compensation current;

[0013] When the predicted remaining life < 80% of the designed life, a maintenance warning is triggered.

[0014] The present invention is further configured such that: the permanent magnet material of the permanent magnet module is NdFeB, and the thermal stability is improved by the dysprosium (Dy) grain boundary diffusion process.

[0015] The present invention is further configured such that: the magnetic circuit compensation module includes a magnetic field sensor and an adjustable compensation winding. By feeding back the magnetic field change, the compensation current of the adjustable compensation winding is dynamically adjusted, and the compensation windings are symmetrically arranged on both sides of the permanent magnet module.

[0016] The present invention is further configured such that: the passive heat dissipation component of the heat dissipation module includes a heat conduction substrate and a phase change material. One end of the heat conduction substrate is closely attached to the surface of the permanent magnet module, and the other end extends outside the magnetic shielding layer; the phase change material is filled in the sandwich of the device housing. The active heat dissipation component includes a heat dissipation fan with adjustable hierarchical speed regulation. The heat dissipation fan is arranged on the through hole of the device housing, and the air supply direction of the heat dissipation fan passes through the heat conduction substrate.

[0017] The present invention is further configured such that: the reliability evaluation module generates a predicted remaining life result by combining the Weibull distribution model and the machine learning algorithm.

[0018] The present invention is further configured such that: the machine learning algorithm adopts an LSTM neural network, inputs time series data including temperature, magnetic field, vibration and current, and outputs correction coefficients for dynamically correcting the Weibull model parameters β and η.

[0019] The present invention is further configured such that: the magnetic shielding layer is made of permalloy material.

[0020] The present invention is further configured such that: the magnetic shielding layer is divided into several independent units. There are connection parts and blank parts between the independent units. The connection parts are transitionally connected by flexible conductive materials, and the blank parts are for the heat dissipation module to pass through.

[0021] The present invention is further configured such that: the part of the heat conduction substrate extending outside the magnetic shielding layer is provided with a fin structure.

[0022] The present invention is further configured such that: the parameters of the Weibull distribution model are set as β = 2.5 and η = 100,000 hours.

[0023] In summary, the present invention has the following beneficial effects:

[0024] 1. The present invention adopts a permanent magnet material with high coercivity and improves the thermal stability in a high-temperature environment through a special process. A split magnetic shielding structure is designed, and through flexible connection and blank layout, the magnetic field shielding and heat dissipation requirements are balanced, and external strong magnetic field interference is suppressed.

[0025] 2. The present invention adjusts the compensation magnetic field in real time based on closed-loop control logic to offset the flux attenuation caused by high temperature or strong magnetic field. The magnetic field compensation components are arranged symmetrically to ensure the uniformity of magnetic field distribution and enhance the anti-interference ability of the device under complex working conditions.

[0026] 3. Integrate passive and active heat dissipation to achieve rapid heat conduction through a thermally conductive substrate. Dynamically adjust the intensity of active heat dissipation according to the temperature threshold to avoid high temperature causing permanent magnet performance degradation.

[0027] 4. Dynamically predict the remaining life of the device based on operating data and machine learning algorithms, and optimize the maintenance strategy in combination with reliability models. Set life warning thresholds, trigger maintenance signals in advance and adjust loads to extend the actual service life of the device.

[0028] 5. Integrate permanent magnet drive, magnetic circuit compensation, heat dissipation and life prediction modules, and realize dynamic priority allocation through collaborative logic. In the case of high temperature, strong magnetic field or insufficient life, the compensation and heat dissipation strategies are triggered in conjunction to ensure the global stability of the system. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below with reference to the embodiments.

[0030] The highly durable high-pressure charge-controlled primary and secondary fusion device of the present invention comprises a device housing, and the device housing is provided with:

[0031] The permanent magnet module is made of high coercive force permanent magnet material, such as NdFeB material, and can be processed through the mature dysprosium grain boundary diffusion process in the prior art to further improve the coercive force, thereby significantly enhancing the stability of the permanent magnet in high temperature and strong magnetic field environment; in order to further ensure stability under harsh working conditions, the present invention also provides a magnetic shielding layer on the outside of the permanent magnet module, and the magnetic shielding layer can be made of Permalloy material. The magnetic shielding layer is used to reduce the interference of the external magnetic field on the permanent magnet magnetic circuit, thereby ensuring the stability of the magnetic field drive.

[0032] Therefore, the permanent magnet module of the present invention can provide stable magnetic field drive in high temperature and strong magnetic field environment.

[0033] Furthermore, a magnetic circuit compensation module is provided, which includes a magnetic field sensor and an adjustable compensation winding. By feeding back the magnetic field change, the compensation current of the adjustable compensation winding is dynamically adjusted. The compensation windings are symmetrically arranged on both sides of the permanent magnet module. The magnetic field sensor can be a Hall sensor, which is also arranged on both sides with an accuracy of ±1mT. The closed-loop control adopts the PID algorithm in the prior art, and its response time is optimized to be less than 10ms. When the detected external magnetic field is greater than 100mT, the compensation current is dynamically adjusted so that the adjustable compensation winding generates a reverse magnetic field to neutralize the external interference, making the internal magnetic flux fluctuation of the permanent magnet module <5%, and avoiding the demagnetization of the permanent magnet due to magnetic circuit imbalance. The specific range of the compensation current is set according to the number of turns and length of the compensation winding and the required target reverse magnetic field. At the same time, because the dynamic response time of the compensation current is short, it is necessary to ensure that while quickly adjusting, the current is prevented from being too large to cause the winding to overheat.

[0034] The heat dissipation module integrates passive heat dissipation components and active heat dissipation components to suppress the temperature rise inside the device; the passive heat dissipation components include a heat conduction substrate and a phase change material. One end of the heat conduction substrate is closely attached to the surface of the permanent magnet module, and the other end extends outside the magnetic shielding layer. Thus, through the setting of the heat conduction substrate, the temperature rise inside the permanent magnet module can be quickly dissipated outward, avoiding overheating inside. In order to enable the heat conduction substrate to extend outside the magnetic shielding layer normally, the magnetic shielding layer of the present invention is divided into several independent units. There are connection parts and void parts between the independent units. The connection parts are transitionally connected by flexible conductive materials. The void parts are for the heat conduction substrate of the heat dissipation module to pass through. The independent units need to completely wrap the two poles of the permanent magnet module. At the same time, they should cover the yoke, magnetic conduction plate and magnetic circuit closing area of the permanent magnet module. The gap of the divided setting is set in the non-sensitive area of the magnetic shielding layer (such as the back or side edge of the permanent magnet module), and the gap is reserved at 3-4 mm. Therefore, the heat conduction substrate in the void part should be thin and wide to ensure effective heat conduction. The rest of the gap is transitionally connected by flexible conductive materials; the flexible conductive material is selected as high-temperature-resistant flexible rubber to ensure electrical continuity and allow a certain degree of thermal expansion displacement. The heat conduction substrate is preferably a copper-graphite composite material. The part of the heat conduction substrate extending outside the magnetic shielding layer can be appropriately made into a fin structure to increase the contact area with the external gas. The phase change material is filled in the sandwich layer of the device shell. The phase change material can be selected as a paraffin-based composite material, and the phase change temperature matches the heat dissipation trigger threshold. In this way, a phase change can occur when the temperature reaches the threshold, delaying the temperature rise. At the same time, in the transient high-temperature scenario of a fault light, it can quickly absorb heat, rapidly reduce the temperature, and it can keep the internal heat relatively stable, avoiding frequent start and stop of the active heat dissipation components and reducing mechanical wear. The active heat dissipation component includes a step-less speed-regulating cooling fan. The cooling fan is arranged on the through hole of the device shell, and the air supply direction of the cooling fan passes through the heat conduction substrate. The cooling fan is used to accelerate the gas flow and enhance the heat dissipation effect. The step-less speed regulation corresponds to different temperature thresholds. For example, when the temperature inside the device is greater than 70 °C, the first-level speed (such as 2000 rpm) is started. When the temperature is greater than 75 °C, the second-level speed (4000 rpm) is started. When the temperature is greater than 80 °C, the full-speed (6000 rpm) is started. At the same time, it should be noted that the temperature sensor should be set at a position where the air flow is relatively stable to avoid inaccurate temperature detection caused by the influence of the air flow.

[0035] The reliability assessment module dynamically predicts the device life based on operation data and failure models. Specifically, it generates the remaining life prediction results by combining the Weibull distribution model with machine learning algorithms. The basic values of the Weibull distribution model are set as the shape parameter β = 2.5 and the scale parameter η = 100,000 hours. Among them, the shape parameter β = 2.5 indicates that the failure rate increases with time and is used to match the failure mode caused by mechanical wear and material aging of the equipment. The scale parameter η = 100,000 hours represents the set characteristic life, and 100,000 hours is set according to the experience of the failure life and can be adjusted adaptively. At the same time, machine learning algorithms such as the LSTM neural network are used to dynamically correct the Weibull parameters (β and η) to improve the prediction accuracy. The input data is the time series data window of the past 60 seconds, including temperature (sampled at 1Hz), magnetic field intensity (1Hz), vibration acceleration (10Hz), and current (1Hz), and the feature dimension is 4. The output is the correction coefficients of the Weibull parameters β and η, and the correction range is limited to 0.8 - 1.2 times the initial value. The model training uses the Weibull log-likelihood loss function superimposed with the L2 regularization term (weight λ = 0.001):

[0036]

[0037] Furthermore, it is also necessary to statistically analyze the historical failure data and hand over the corresponding operation data at the time of failure to the algorithm for learning. Network structure design: The input layer includes a sliding window of time series data (temperature, magnetic field, vibration, current) (the window length is 60 seconds, corresponding to 60 time steps, and the sampling frequencies are such as 1Hz for temperature and 10Hz for vibration); the LSTM layer includes 2 layers of LSTM units (32 neurons in each layer) to capture long-term dependence relationships; the output layer uses a linear activation function, and through the physical constraint layer, it is restricted that β' = max(1, β init ×0.8) and η' = max(50,000 hours, η init ×0.8) to ensure that the parameters conform to the equipment failure law (when the β' correction coefficient output by the LSTM is < 0.8, β' = 2.5 × 0.8 = 2.0 is used as the lower limit). In this way, by real-time collecting sensor data, slicing it into windows and inputting it into the LSTM model, the corrected β′ and η′ are output by the model and substituted into the Weibull distribution formula: Calculate the current remaining useful life RUL = η′·(-ln(1 - F)) 1 / β′ , where F = 5% is the allowable failure probability. On this basis, a feedback mechanism can also be set. When an actual failure occurs, compare the predicted life with the real life, update the model weights by backpropagating the error, and priority adjustment can be performed to assign higher weights to the abnormal condition data with a magnetic field intensity greater than 100mT or a temperature greater than 80°C. Priority weight calculation:

[0038]

[0039] Where B is the magnetic field strength (mT), T is the temperature (°C), and the weight coefficient is used to weight the contribution of samples in the loss function. Through the above machine learning algorithm, the output results are the updated values of β and η, which are combined with the Weibull distribution model to more accurately output the predicted remaining life value.

[0040] The cooperative control device is connected to the above modules and performs cooperative control. It receives the data of each sensor and controls each module. Its function is to ensure the stability and long life of the device under harsh working conditions such as high temperature and strong magnetic field by integrating the data of each module in real time and dynamically adjusting the operation strategy. For example, when the temperature exceeds the preset threshold, the maximum current mode of the compensation winding and the full-speed operation of the cooling fan are synchronously triggered; the magnetic circuit compensation module real-time monitors the magnetic flux attenuation through the magnetic field sensor, triggers the compensation winding to output the maximum current, generates a reverse magnetic field to offset the magnetic flux loss caused by high temperature, and at the same time the cooling fan performs active heat dissipation to control the temperature rise in time. When the external magnetic field strength is greater than the preset threshold, the compensation current is dynamically adjusted. It should be noted that the compensation current dynamically adjusted due to the magnetic field change takes precedence over the compensation current adjusted due to high temperature to avoid external interference first. When the predicted remaining life < 80% of the design life, abnormal working conditions are detected in advance, and a maintenance warning is triggered to avoid losses caused by failure shutdown.

[0041] Next, further elaboration will be carried out in combination with specific data:

[0042] Example 1: Suitable for conventional harsh working conditions (ambient temperature -40°C to +85°C, external magnetic field ≤ 200 mT).

[0043] Optimization of the permanent magnet module:

[0044] Select NdFeB permanent magnets. Processed by dysprosium grain boundary diffusion technology: heated to 900°C in a vacuum furnace (10^-3 Pa), after holding for 2 hours, deposit a 5-μm-thick Dy film on the surface of the magnet, and then perform diffusion annealing at 950°C × 5 h under argon protection. After treatment, the coercivity Hcj is increased from 35 kOe to 42 kOe, and the irreversible magnetic flux loss at high temperature (150°C) is reduced from 15% to 3.2%. The magnetic shielding layer uses 0.5-mm-thick 1J85 permalloy, which is divided into 6 independent units with a unit gap of 3 mm, and is embedded with flexible conductive silica gel (volume resistivity 0.01 Ω·cm). After testing, this structure can attenuate the external 200-mT interference magnetic field to ≤ 5 mT inside.

[0045] Magnetic circuit compensation control:

[0046] The compensation winding is wound with Φ0.5-mm enameled wire for 600 turns and symmetrically arranged on both sides of the permanent magnet. The sampling frequency of the Hall sensor is 1 kHz, and the compensation current adjustment uses the fuzzy PID algorithm:

[0047]

[0048] Among them, the proportionality coefficient K p = 2.5, the integral time T i = 0.1 s, the derivative time T d = 0.05 s. When the detected magnetic flux deviation ΔΦ ≥ 5%, a compensation current (adjustable from 0 - 5 A) is output within 10 ms, and the magnetic field uniformity is improved to within ±1.5%.

[0049] Heat dissipation system design:

[0050] The heat-conducting substrate is a 3-mm-thick copper / graphite composite material (thermal conductivity 450 W / m·K), with a fin structure processed on the surface. The phase change material is paraffin / expanded graphite composite (phase change point 72°C ± 2°C, latent heat 180 J / g). The heat dissipation fan uses a PWM speed-controlled EC motor (rotation speed range 1000 - 6000 rpm), and the temperature control strategy is as follows:

[0051] Temperature range (°C) Fan speed (rpm) Compensation current limit (A) T≤70 Off 3.0 70<T≤75 2000 4.0 75<T≤80 4000 5.0 T>80 6000 5.0 (Over-temperature alarm)

[0052] Reliability assessment model:

[0053] The input layer of the LSTM network contains 4D data (temperature, magnetic field, vibration, current) with 60 time steps, the hidden layer has 2×32 neurons, and the output layer predicts the Weibull parameters β' and η'. The training data set contains 2000 groups of accelerated aging test data (85°C / 85% RH, 200 mT magnetic field), and the test set shows that the life prediction error ≤ 8%. When the RUL < 80% of the designed life, the system automatically reduces the load current by 20% and sends a warning signal.

[0054] Cooperative control logic:

[0055] Temperature priority mode (T > 75°C): Force the fan to start + upper limit of compensation current.

[0056] Magnetic field priority mode (B > 150 mT): Energize the magnetic shielding layer (generate an additional 30 mT reverse field) + dynamic compensation.

[0057] Life maintenance mode (RUL < 80%): Trigger a three-level warning (local indicator light + wireless transmission + cloud platform push).

[0058] Example 2: Variant in high humidity environment;

[0059] Based on Example 1, the following improvements are made for the high humidity environment (humidity ≥ 95% RH):

[0060] Moisture-proof treatment: Spray a 10-μm-thick parylene coating on the surface of the magnetic shielding layer, and impregnate the compensation winding with epoxy resin (moisture and heat resistance grade F).

[0061] Heat dissipation optimization: The phase change material is replaced with a fatty acid / diatomaceous earth composite (phase change point 68°C, moisture absorption rate <0.1%). Sensor protection: The Hall sensor is equipped with a nitrogen-filled sealed cavity (IP68 protection).

[0062] After the salt spray test (5% NaCl, 35°C × 96 h), the magnetic flux attenuation rate is only 2.1%, which is 4 times higher than that of the untreated sample.

[0063] Example 3: High-vibration industrial scenario

[0064] Suitable for substation environments with a vibration intensity of 5 Grms:

[0065] Structural reinforcement: A silicone rubber shock pad (damping coefficient 0.15) is added between the permanent magnet and the outer shell, and the connecting part of the magnetic shielding unit is changed to a beryllium copper alloy spring sheet. Heat sink fixation: The heat conduction substrate and the outer shell are fixed by laser welding + thermal conductive adhesive (shear strength ≥15 MPa). Algorithm anti-interference: The vibration signal is input into the LSTM model after noise reduction by wavelet transform, and the prediction error is reduced to 5%. Vibration tests show that under random vibration of 10 - 2000 Hz, the magnetic flux fluctuation ≤ ±0.8%.

[0066] Comparative tests were carried out on Examples 1 - 3, and the data are as follows in the table:

[0067]

[0068]

[0069] Through Dy grain boundary diffusion + double-stage magnetic compensation, after continuous operation for 1000 hours under the condition of 150°C / 200 mT, the magnetic flux attenuation rate ≤ 5%, which is 3 times more stable than the traditional scheme.

[0070] The intelligent heat dissipation system enables the internal temperature rise ≤ 15 K under extreme conditions (ambient temperature 85°C), avoiding irreversible demagnetization of the permanent magnet.

[0071] The early warning time of the LSTM-Weibull hybrid model for sudden faults is advanced to 72 ± 8 hours, and the maintenance cost is reduced by 40%.

[0072] The split magnetic shielding structure improves the heat dissipation efficiency by 22% while ensuring the shielding effectiveness (≥35 dB).

[0073] Example 4: Custom version for extra-high voltage substations

[0074] In response to the special requirements of extra-high voltage scenarios above 550 kV, the following improvements are made on the basis of Example 1:

[0075] Gradient magnetic shielding structure:

[0076] Adopt a three - layer composite shielding: the inner layer is 1J85 permalloy, the middle layer is amorphous alloy, and the outer layer is electrolytic copper. A nano - alumina insulating layer (dielectric strength ≥ 30 kV / mm) is filled between each layer. It is measured that under an external interference of 500 mT, the internal magnetic field ≤ 8 mT, and the eddy current loss is reduced to 18% of the traditional structure.

[0077] Multi - physical - field coupling compensation:

[0078] Add a temperature - magnetic field combined compensation algorithm:

[0079] I comp = K T (T - 25)+K B (B ext - 50)

[0080] Where K T = 0.05 A / ℃, K B = 0.02 A / mT.

[0081] Directional phase - change heat dissipation technology:

[0082] Embed micro - phase - change capsules (diameter 2 mm, docosane / graphene composite) in the hot - spot area of the permanent magnet (determined by infrared thermal imaging)

[0083] Configure a dual - mode heat - dissipation channel, including:

[0084] Normal mode: axial air flow (wind speed 2 m / s)

[0085] Emergency mode: radial jet impingement cooling (wind speed 8 m / s, local heat - transfer coefficient increased to 380 W / m 2 ·K) Measured data:

[0086] In the 550 kV / 3150 A short - circuit test, comparison of the temperature - rise curves:

[0087] Time (min) This device (°C) Traditional device (°C) 0 25 25 5 38 67 10 42 92 (Trigger protection) 15 45 -

[0088] The advantages of the present invention are as follows: The adoption of a split - type magnetic shielding structure is an important breakthrough in this solution. The permalloy magnetic shielding layer is divided into several independent units, and the electromagnetic continuity connection between the units is realized through flexible conductive materials. At the same time, heat - dissipation voids are set in non - sensitive areas. This design cleverly balances the requirements of magnetic - field shielding and heat dissipation: When the device encounters an external strong magnetic field, the split - type shielding layer forms a continuous shielding magnetic field through the multi - unit superposition effect. It is measured that its shielding efficiency for a 100 mT power - frequency magnetic field reaches 92%; while under high - temperature conditions, the void provides a direct heat - dissipation channel for the heat - conducting substrate, and together with the thermal - expansion compensation ability of the flexible connection structure, the magnetic - shielding system still maintains structural integrity at a high temperature of 120℃, and the heat - dissipation efficiency is increased by 40% compared with the traditional integral - type shielding structure.

[0089] A dual-closed-loop control system is constructed based on symmetrically arranged compensation windings to form a dynamic balance magnetic field on both sides of the permanent magnet module. When the magnetic field sensor detects that the local magnetic flux deviates from the range set by the set value, the compensation module can generate a reverse compensation magnetic field within a short time, and the magnetic flux fluctuation is controlled within ±1.5% through a power module with a current regulation accuracy of 0.1A. Especially under the extreme working condition of suddenly applying an external interference of 150mT, this module makes the working point of the permanent magnet stable in the linear region of the demagnetization curve and avoids irreversible demagnetization through preferentially enhancing the magnetic shielding effect and the hierarchical compensation strategy. The measured data shows that this design improves the magnetic holding force of the device in a strong magnetic field environment to 2.3 times that of the traditional scheme.

[0090] The coupled design of phase change materials and active heat dissipation forms a dual thermal protection mechanism. Under normal working conditions, the phase change materials filled in the outer shell sandwich maintain thermal balance through latent heat absorption, and the temperature fluctuation inside the device is controlled within ±2°C; when the temperature sensor detects that a local hot spot exceeds 75°C, the hierarchical speed regulation fan and the heat conduction substrate form a directional air duct to achieve key part heat dissipation. This "static heat storage + dynamic heat dissipation" mode not only avoids the energy consumption problem of continuous fan operation but also ensures that the temperature rise rate is reduced by 60% under sudden overload working conditions. Verified by 1000-hour high-temperature aging tests, this heat dissipation system keeps the working temperature of the permanent magnet always lower than the safety threshold of its Curie temperature.

[0091] The reliability assessment module constructs a prediction system with self-learning ability by integrating physical models and data-driven algorithms. The Weibull distribution model provides a framework for basic failure laws, while the LSTM neural network analyzes multi-dimensional sensor data such as temperature and vibration in real time to dynamically correct model parameters. This hybrid prediction method effectively solves the problem of poor adaptability of traditional models under complex working conditions: when an abnormal vibration spectrum is detected, the system automatically increases the weight of the mechanical wear factor; when encountering continuous high temperature, the calculation of the material aging coefficient is strengthened. Practical applications show that the early warning time of this module for sudden failures is 72 hours earlier than that of a single model, and the false alarm rate is reduced to less than 5%.

[0092] By establishing a three-level emergency response mechanism, the system realizes the optimal allocation of resources. Under complex and harsh working conditions (such as simultaneous occurrence of high temperature and strong magnetic field interference), the control device executes the decision-making logic of "magnetic field first - temperature second - life guarantee": first, activate the magnetic shielding enhancement mode and adjust the compensation current, start the maximum heat dissipation power after the magnetic field is stable, and finally optimize the load parameters according to the remaining life assessment results. This hierarchical response strategy enables the device to maintain more than 85% of the rated performance when multiple stresses are superimposed, and the failure rate is reduced by 58% compared with the traditional parallel control method. A specially designed self-check program performs a system health assessment every 30 minutes to ensure that each module is always in the best cooperation state.

[0093] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present invention shall be included within the protection scope of the present invention.

Claims

1. A highly durable high-voltage fee-controlled primary-secondary integrated device, characterized in that: It includes a device housing, and inside the device housing are provided: a permanent magnet module, which is made of a high coercivity permanent magnet material and is provided with a magnetic shielding layer on the outside, and is used to provide a stable magnetic field drive in high temperature and strong magnetic field environments; a magnetic circuit compensation module, which adjusts the magnetic field distribution in real time through a closed-loop control logic and is used to offset the magnetic flux attenuation caused by external environmental interference; a heat dissipation module, which integrates passive heat dissipation components and active heat dissipation components and is used to suppress the temperature rise inside the device; a reliability evaluation module, which dynamically predicts the device life based on operation data and a fault model; a cooperative control device, which is connected to the above modules and conducts cooperative control, including: when the temperature exceeds a preset threshold, triggering the maximum current mode of the compensation winding and the full-speed operation of the cooling fan; when the external magnetic field strength is greater than the preset threshold, preferentially enhancing the magnetic shielding effectiveness and dynamically adjusting the compensation current; when the predicted remaining life < 80% of the design life, triggering a maintenance warning.

2. The high-durability high-voltage fee control primary-secondary integration device according to claim 1, wherein: The permanent magnet material of the permanent magnet module is NdFeB, and the thermal stability is improved through the dysprosium (Dy) grain boundary diffusion process.

3. The high-durability primary-secondary integrated device for high-voltage fee control according to claim 1, characterized in that: The magnetic circuit compensation module includes a magnetic field sensor and an adjustable compensation winding. By feeding back the magnetic field change, the compensation current of the adjustable compensation winding is dynamically adjusted, and the compensation windings are symmetrically arranged on both sides of the permanent magnet module.

4. A highly durable primary-secondary integrated device for high-voltage fee control according to claim 1, characterized in that: The passive heat dissipation components of the heat dissipation module include a heat conduction substrate and a phase change material. One end of the heat conduction substrate is closely attached to the surface of the permanent magnet module, and the other end extends outside the magnetic shielding layer; the phase change material is filled in the sandwich layer of the device housing. The active heat dissipation components include a cooling fan with adjustable speed grading, and the cooling fan is arranged on the through hole of the device housing, and the air supply direction of the cooling fan passes through the heat conduction substrate.

5. A highly durable high-voltage fee control primary-secondary integration device according to claim 1, characterized in that: The reliability evaluation module generates a predicted result of the remaining life by combining the Weibull distribution model and a machine learning algorithm.

6. A highly durable high-voltage fee-controlled primary-secondary integration device according to claim 5, characterized in that: The machine learning algorithm uses an LSTM neural network, inputs time series data including temperature, magnetic field, vibration and current, and outputs correction coefficients for dynamically correcting the Weibull model parameters β and η.

7. A highly durable high-voltage fee control primary-secondary integration device according to claim 1, characterized in that: The magnetic shielding layer is made of permalloy material.

8. A highly durable high-voltage fee-controlled primary-secondary integration device according to claim 1 or 7, characterized in that: The magnetic shielding layer is divided into several independent units, and there are connection parts and blank parts between the independent units. The connection parts are transitionally connected by flexible conductive materials, and the blank parts are for the heat dissipation module to pass through.

9. The high-durability high-voltage fee-control primary-secondary integration device according to claim 4, characterized in that: The part of the heat conduction substrate extending outside the magnetic shielding layer is provided with a fin structure.

10. A highly durable primary-secondary integrated device for high-voltage charge control according to claim 5 or 6, characterized in that: The parameters of the Weibull distribution model are set as β = 2.5 and η = 100,000 hours.

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