89 results about "Electric field distortion" patented technology

The invention relates to the technical field of power cables, in particular to a high-toughness polyethylene insulated power cable and a preparation method thereof. The invention relates to a preparation method of a high-toughness polyethylene insulated power cable. The preparation method comprises the following steps: preparation of a toughening flame-retardant modifier, preparation of a montmorillonite compound, preparation of a toughening modified montmorillonite compound and preparation of the polyethylene insulated power cable. Through specific material mixing and grafting modification, the performance of the cable insulation layer is remarkably improved. The deep trapped charge trapping capability is enhanced, space charge accumulation and electric field distortion are avoided, the DC voltage level and the operation safety are improved, and the dielectric loss and the aging speed are reduced; the dispersibility of montmorillonite is also optimized, a physical reinforcing network is formed, and the mechanical property and the electric breakdown resistance are improved; meanwhile, toughening and flame retardance are coordinated, the problem of embrittlement caused by a traditional flame retardant is solved, and the service life of the insulating layer is comprehensively prolonged.

The invention relates to the technical field of partial discharge processing, and discloses a partial discharge processing method and system based on electric field analysis, and the method comprises the steps: synchronously collecting the multi-point electric field intensity and charge density of a device surface, recognizing a charge abnormal region, and calculating an electric field non-uniformity index; inputting the information into a finite element analysis model, simulating an electric field distortion process, and positioning potential discharge induction points; predicting a charge accumulation trend of each potential point in combination with historical operation data, and constructing an optimization function taking minimization of global electric field distortion and charge accumulation risk as a target according to the charge accumulation trend; and with the function as a convergence target, an optimal electric field compensation parameter is automatically solved through iterative calculation. According to the partial discharge processing method and system based on electric field analysis, predictive recognition and counteracting are carried out on discharge core inducements, and active and accurate suppression of partial discharge of equipment is achieved.

This invention discloses a method and system for identifying safety hazards in power equipment, specifically relating to the field of intelligent operation and maintenance technology for power equipment. It addresses the hidden operational risks caused by the mismatch between equipment aging characteristics and generalized strategies in existing technologies. By collecting multi-source operating status data of power equipment and constructing an asynchronous dataset, it dynamically identifies spatial electric field distortion gradients and contact resistance fluctuations as abnormal parameters. Based on equipment structural characteristics, it assigns differentiated weights to these abnormal parameters, quantifying the risk levels of different areas. It analyzes the temporal correlation between contact resistance and electric field response to determine the breakdown risk caused by insulation degradation. Combining the risk levels, it generates maintenance cycle optimization schemes and electric field compensation parameters, and dynamically updates the aging model based on execution feedback. Through dynamic adaptation of equipment status and control strategies, it achieves early warning and precise intervention for potential hazards, effectively solving the control mismatch problem caused by neglecting material degradation characteristics in traditional methods.

A vegetation flame condition direct current gap multi-physical field coupling simulation method, determines the physical quantity required for simulation of charged particle motion, distribution and electric field distribution in the air gap under the condition of applying direct current voltage under the condition of typical vegetation flame, the connection between each physical field; determine the control equation of each physical field; determine the simulation method of multi-physical field coupling; determine the chemical reaction equation corresponding to the vegetation and the pyrolysis material coefficient; measure the vegetation flame temperature distribution and leakage current data by combustion test; compare the simulation obtained flame temperature distribution and leakage current with the test obtained temperature distribution and leakage current data, determine the vegetation pyrolysis reaction equation and chemical reaction rate parameter; simulation calculation obtains the charged particle concentration distribution characteristics and the space electric field distribution characteristics affected by the charged particles generated by the flame combustion. The present application can obtain the charged particle motion, distribution characteristics and electric field distortion of the direct current gap under the condition of typical vegetation flame.

The application discloses a space charge distribution calculation method based on tunneling effect and hole extraction restriction, and belongs to the technical field of electrical engineering, and comprises the following steps: a one-dimensional finite element structure model is established, taking polymer material as a main body and electrodes as boundaries; a periodic polarity reversal voltage is applied at the electrode boundary by coupling Maxwell electromagnetic field theory and Nernst-Planck theory, and a recombination carrier injection model and a hole extraction restricted boundary condition are introduced, so that a polymer material space charge distribution model based on tunneling effect and hole extraction restriction mechanism is obtained; and the polymer material space charge distribution model is solved to obtain the space charge distribution and electric field distortion law of the polymer material under the conditions of strong electric field and polarity reversal. The method solves the problem that the existing space charge model cannot effectively depict the tunneling emission and hole extraction restriction effect at the electrode interface, and provides important support for the polymer insulation aging research under the conditions of strong electric field and polarity reversal.

The invention relates to the technical field of high-voltage direct-current cables, in particular to a load circulation system of a high-voltage direct-current cable system and an operation method, and the system comprises a temperature circulation module which comprises a PID temperature control unit and a conductor heating unit, and the conductor heating unit is electrically connected with the PID temperature control unit; the multi-polarity voltage loading unit is provided with a high-voltage source, and the high-voltage source can output voltage from the negative polarity to the positive polarity; and the distributed electric field sensor is embedded at the interface of the cable accessory stress cone and the insulation, and the distributed electric field sensor is in contact with the surface of the cable accessory stress cone. The method has the beneficial effects that the tangential electric field distribution at the cable accessory stress cone and the insulation interface is monitored in real time through the distributed electric field sensor, and the maximum electric field intensity is reduced in combination with the low ripple design of the multi-polarity voltage loading unit and the design of the interface conductivity matching layer, so that the electric field distortion and the surface discharge risk are effectively inhibited, and the reliability of the cable accessory is improved. And the operation stability of the high-voltage direct-current cable system under complex working conditions is improved.

The invention provides an SF6 / epoxy core interface fluorinated layer charge accumulation-dissipation regulation and control method and characterization system, a nanoscale fluorinated layer is constructed on the surface of epoxy resin through gradient gas phase fluorination, and the proportion of C-F bonds of the epoxy resin fluorinated layer is controlled to be 68% + / -2% through XPS in-situ characterization real-time optimization. The charge behavior and trap state distribution of the SF6 / epoxy interface are regulated and controlled, the interface breakdown field strength is improved, and the real-time monitoring of the trap state density and the dynamic charge distribution is realized by integrating an XPS probe and a surface potentiometer in combination with a characterization system. Through a cross-scale technical path of molecular scale fluorination site regulation and control-nanostructure morphology control-macroscopic performance real-time verification, accurate regulation and control of epoxy resin fluorination layer interface charges and trap state density are realized, the problems that the trap state density of a traditional fluorination layer is relatively high, and carrier accumulation and electric field distortion are easily caused are solved, and the performance of the epoxy resin fluorination layer is improved. Therefore, the insulating performance is improved, and the method is suitable for performance optimization of epoxy insulating parts in SF6 gas insulated electrical equipment.

The invention discloses a distribution transformer small-size defect identification method and device based on a large electric power model and a storage medium, and belongs to the field of distribution transformer defect identification. The method comprises the steps that electric field data, voltage data and current data of a distribution transformer are collected, and the electric field distortion degree is calculated based on the electric field data; calculating a dielectric loss angle increment based on the voltage data and the current data; constructing a power operation semantic network through the distribution transformer image, and performing electric field distortion detection in combination with the electric field distortion degree to obtain an electric field distortion detection result; performing fault type identification based on the dielectric loss angle increment and dielectric loss angle parameters in the power operation semantic network to obtain an abnormal fault type; and matching in a preset small-size defect identification library based on the electric field distortion detection result and the abnormal fault type to obtain the small-size defect type of the distribution transformer. Therefore, by implementing the method, accurate identification of the small-size defect type of the distribution transformer can be realized.

This disclosure provides a method, apparatus, device, and storage medium for predicting the probability of lightning strikes on transmission lines. The method includes acquiring real-time distribution data of a target transmission line, inputting a preset environmental correction model, performing localized parameter calculations to obtain the physical field calculation parameter set and regional lightning discharge conditions for the target area corresponding to the target transmission line, inputting a charge movement model to determine the predicted electric field distortion data and the predicted charge concentration distribution data along the line, aligning the two with pre-acquired lightning measurement data spatiotemporally and performing error analysis to obtain error spatiotemporal distribution data, and adjusting the environmental correction model and the charge movement model accordingly. The final generated lightning strike probability report enables the prediction of spatial charge movement and electric field distortion under lightning strikes on high-altitude transmission lines and can specifically assess flashover risks, providing a quantitative analysis tool for differentiated lightning protection design of high-altitude ungrounded transmission lines.

The invention relates to the technical field of high-voltage power transmission equipment, in particular to a design method, device and system for an anti-aging composite insulator in a hot and humid area. The large umbrella diameter, the umbrella skirt spacing and the umbrella skirt dip angle are determined through the umbrella skirt structure design step, the core rod structure material, the glass fiber volume fraction and the core rod waterproof coating total thickness are determined through the core rod structure design step, and the hardware fitting base material and surface treatment, the ceramic layer total thickness and the bowl head thickness are determined through the hardware fitting structure design step. The length of the long axis and the length of the short axis of the elliptical ring are determined through the grading ring structure design step, and finally performance verification is conducted on the designed anti-aging composite insulator according to the preset acceptance standard so that it can be guaranteed that the designed anti-aging composite insulator can not appear in the humid and hot environment. The problems of rapid umbrella skirt aging, core rod water tree development, severe hardware fitting corrosion and grading ring electric field distortion are solved.

The invention discloses a drop-out fuse fusion tube with an automatic on-off function. The drop-out fuse fusion tube comprises a fusion tube body, the series connection automatic on-off branch circuit is arranged in the fusion tube body, and the series connection automatic on-off branch circuit is configured to have the following electrical characteristics that the series connection automatic on-off branch circuit is in an on state under an alternating current operation working condition and is in an off state under a direct current test transmission working condition; and the gradient potential transition and shielding integrated structure is arranged at the connecting end part of the series automatic on-off branch and the fusion tube body. An integrated shielding structure of a curved surface equipotential ring, a shielding cup and a conductive gradient coating is constructed at the end part of a fusion tube, and a continuous and controllable potential gradient is formed in a three-dimensional space by utilizing a potential transition layer, so that end part electric field distortion caused by introduction of a series automatic on-off branch is effectively eliminated; and the local field intensity peak value is obviously reduced, and the local discharge initial voltage is improved, so that the aging rate of the insulating medium is greatly delayed.

This invention provides a method for intelligent monitoring and early warning of water droplet impact in substations during rainy weather, relating to the field of intelligent operation and maintenance and condition monitoring of substations. The method includes: acquiring dual-optical-path video streams; constructing a cross-spectral neural radiation field network; using joint high-dimensional features as input to output volume density and radiation color vectors; calculating the equivalent water film thickness from these two vectors to generate an equivalent water film thickness distribution field; mapping this field to a three-dimensional model, subdividing the mesh according to the thickness gradient modulus, and solving for the electric field to obtain the electric field distortion tensor and calibrate the high-discharge-risk critical region; generating a Lagrange particle set, solving the dynamic equations through smooth particle hydrodynamics, and simulating the water film evolution to obtain the probability of conductive water bridge connection; inputting the distribution field, distortion tensor, and connection probability into a multi-modal impedance reconstructor to generate an electrochemical impedance spectrum to obtain the dynamic insulation margin attenuation rate; and triggering an early warning based on the determined conditions. This invention significantly improves the timeliness and accuracy of early warning for external insulation faults during rainy weather.

This invention relates to the field of polymer dielectric materials and discloses a cyclic olefin copolymer / anthracene composite dielectric film for high-temperature energy storage, comprising 100 parts by weight of a cyclic olefin copolymer and 0.2 to 1.0 parts by weight of anthracene. The anthracene is uniformly dispersed in the amorphous network interstices of the cyclic olefin copolymer, utilizing the energy difference between their lowest unoccupied molecular orbitals to construct deep trap sites. By capturing free carriers injected at the electrode interface under high temperature and strong electric field conditions, electron migration is restricted, thereby blocking leakage conduction paths within the bulk phase of the material. This invention effectively reduces Joule heat accumulation during charge transport, improves the high-temperature withstand voltage and insulation reliability of the film, while maintaining relatively low dielectric loss. This all-organic blend system avoids local electric field distortion caused by inorganic filler agglomeration, and the preparation process is simple and mild, facilitating large-scale engineering applications.

This invention relates to the field of semiconductor processing technology, and more particularly to a deep learning-based method for monitoring semiconductor material processing. The method includes the following steps: extracting spatial distribution features of microcracks from microcrack spatial distribution data and analyzing the stress concentration at the microcrack tip; extracting electric field intensity distribution features, and combining the microcrack spatial distribution features and the stress concentration at the microcrack tip to analyze the distortion effect of microcracks on the local electric field distribution and the electric field enhancement effect at the microcrack tip, determining the local field strength shift caused by electric field distortion; constructing a coupling constraint relationship between microcrack structural features and microcavity migration behavior; inputting the coupling constraint relationship into a deep learning network to identify path deviation risks during microcavity migration and provide path deviation risk warnings. This invention effectively improves the stability and controllability of semiconductor microcavity structure processing by quantifying the potential influence of microcrack structure on the electric field distribution during microcavity migration.

The application belongs to the technical field of transformer detection, and provides a winding insulation fault detection method and system based on a low-noise dry-type transformer, which comprises the following steps: determining an electric field uniform disconnection period through an electric field distortion coefficient, pre-correcting a partial discharge amount, calculating a partial discharge correction amount, judging whether the partial discharge correction amount is within an error range, evaluating the necessity of correction, determining an electric field distortion period, correcting the partial discharge amount in the electric field distortion period, and judging and evaluating insulation faults after correction; comparing an insulation fault time point with the electric field distortion period, comparing insulation fault judgment results before and after partial discharge correction, judging insulation detection misjudgment risks caused by non-partial discharge correction, constructing a dynamically updated correction parameter library, correcting the discharge amount during subsequent detection, and improving the detection efficiency of subsequent winding insulation faults.

The invention provides a gas-phase fluorination regulation and control method for synchronously improving internal and external insulating properties of an extra-high-voltage direct-current wall bushing, and relates to the technical field of power transmission and transformation equipment of a power system. According to the method, the electric-thermal-mechanical coupled multi-physical field simulation model is established, iteration with experimental data is carried out, the fluorination reaction rate of the surface of the epoxy resin core rod and the fluorination layer thickness of the silicone rubber outer insulation layer are synchronously regulated and controlled by adopting a collaborative fluorination process, and the gas-solid interface breakdown voltage and the outer insulation surface flashover gradient of the sleeve are respectively improved by about 20% and 25%. Experiment and simulation results show that the method can effectively regulate and control gas-solid interface charge distribution, inhibit electric field distortion and improve surface flashover voltage; the direct fluorination treatment obviously enhances the breakdown strength and surface flashover tolerance of the high polymer material, obviously improves the overall insulation performance of the bushing under the extra-high voltage direct current working condition, and solves the technical problem of synchronous improvement of the internal and external insulation performance of the extra-high voltage wall bushing.

The technology is directed to activating a wireless modem within a Customer Premise Equipment (CPE) to initiate signal detection. The wireless modem includes one or more Rydberg sensors containing one or more transmit antennas having one or more Rydberg atoms. The Rydberg atom sensors can be used to detect electromagnetic fields of downlink data transmissions from a base station while avoiding electric field distortion from one or more metallic members of the transmit antennas, impedance from the metallic members, and / or insertion loss from a duplexer of the CPE. The transmit antennas transmit uplink data transmissions to the base station for a service provided to a subscriber associated with the CPE. The CPE routes both the downlink data transmissions and the uplink data transmissions for the service provided to the subscriber.

The invention belongs to the technical field of fire-fighting weak current boxes, and particularly relates to a DCDC power supply fault diagnosis method and system suitable for a new energy automobile, and the method comprises the following steps: S1, quantum dot enhanced self-reconfiguration digital twin modeling: implanting a quantum dot film sensor on the surface of a DCDC power supply core device, the fluorescence intensity generates nonlinear response along with small changes of temperature, stress and an electric field, and hidden physical characteristics which cannot be recognized by a traditional sensor can be captured; the characteristics of micro stress, electric field distortion and the like of a device are captured through quantum dot sensing, and full-dimensional sensing of hidden faults is realized by combining electromagnetic-thermal-mechanical-environment four-field coupling characteristic fusion; and then false association is eliminated through a causal reasoning model and a Do-Calculus algorithm, and the feature-root cause direct causal relationship is quantified.

The invention discloses a high-reliability high-voltage power cable, and belongs to the technical field of power transmission equipment. The cable comprises an insulating wire core, a metal shielding waterproof layer, a semi-conductive deformable filling buffer layer between the insulating wire core and the metal shielding waterproof layer, and a surface-smooth semi-conductive electric field uniform layer which is formed by extrusion outside the metal shielding waterproof layer. The semi-conductive deformable filling buffer layer is semi-conductive plasticine with specific rheological and electrical properties, full-interface close contact is realized through flow filling when the metal shielding waterproof layer is formed, and stable electrical contact is ensured; the electric field uniform layer eliminates electric field concentration of the wrinkle structure. The cable further comprises a conductor waterproof layer, a semi-conductive comprehensive buffer waterproof layer, a metal sleeve anti-corrosion layer, an outer sheath and a conductive layer. Through collaborative design, the problems of interface instability corrosion and electric field distortion of a traditional cable are systematically solved, the waterproof performance, the corrosion prevention performance, the mechanical buffering performance and the long-term operation reliability are remarkably improved, and the cable is suitable for high-voltage power transmission.

The invention belongs to the technical field of high-voltage power equipment insulation, and particularly relates to a transformer bushing voltage-sharing ball and a manufacturing method. Comprising a conductive curved surface, the outer layer of the conductive curved surface is covered with an insulating layer, the conductive curved surface is vertically symmetrical along a center line, the upper half section of the conductive curved surface comprises a vertical section, a first arc-shaped section, a horizontal section, a transition section and a main body section which are sequentially connected, and the transition section and the main body section are NURBS curved surfaces. By introducing the NURBS curved surface transition structure, electric field distortion generated at the geometric transition position of a traditional voltage-sharing ball is avoided, and electric field distribution at the oil end of the tail of the sleeve is more uniform. Under high-voltage and extra-high-voltage working conditions, the local electric field intensity can be remarkably reduced, and the risks of partial discharge and breakdown in oil are reduced; and a parametric design method is adopted, so that rapid modeling and optimization under different voltage levels and structure sizes are facilitated, and the design efficiency and precision are improved.

The application provides a spherical metal particle suppression structure, a GIS terminal and a GIS cable outlet system, and relates to the technical field of high-voltage electrical equipment. The spherical metal particle suppression structure is arranged in a metal shell (as a ground electrode) of a GIS terminal, and comprises a gradient electrode and a particle trap. The gradient electrode is sleeved on a conductive rod in the metal shell (both are coaxial with the GIS terminal), and the particle trap is arranged on the inner side wall of the metal shell and close to a power output end (connected to a high-voltage cable) of the GIS terminal. The outer diameter of the gradient electrode gradually decreases along the axial direction from a power input end (connected to a GIS device) to the power output end of the GIS terminal, and is coupled with the conductive rod and the ground electrode to form a directional non-uniform electric field, which can guide the spherical metal particles entering from the power input end to move to the power output end and fall into the particle trap to be captured. In this way, the spherical metal particles can be prevented from contacting the epoxy sheath of the power output end, and electric field distortion and discharge failure can be effectively avoided.

The application relates to the technical field of power cables, and discloses a cold-resistant power cable based on a modified elastomer sheath and a preparation method thereof, and aims to solve the interface failure problem caused by the different step of the dielectric properties of an insulation layer and a sheath layer with temperature change when the existing cold-resistant cable is operated for a long time in a low-temperature environment. The cable insulation layer adopts a rubber composite material containing cyanoethylated pentaerythritol, a polar group is anchored in a crosslinked network in a chemical bonding mode, the rate of the dielectric constant with temperature drop is slowed down, the outer sheath layer adopts a modified elastomer material composed of chlorinated polyethylene, specific polyester and a low-temperature plasticizer, the temperature response behavior of the dielectric constant is actively controlled by adjusting the flexibility of the molecular chain, the dielectric matching of the insulation layer is realized at low temperature, the electric field distortion at the interface between the insulation and the sheath at low temperature is inhibited, and the interface electrical stability and long-term operation reliability of the cable in an extremely low-temperature environment are improved.

This invention discloses a multi-objective optimization method for high-voltage silicon carbide modules, relating to the fields of power semiconductor packaging and electromagnetic compatibility (EMC). It quantifies the transient electric field distribution vector of the switch and generates a dynamic admittance compensation scalar using a mapping function. Based on impedance offset, it calculates the resonant frequency offset of the parasitic loop and tunes the impedance topology parameters accordingly. This invention establishes the physical logic of field strength stress-driven impedance evolution, enabling local charge migration to be reflected as a controllable evolution of the resonant frequency. While suppressing electric field distortion, it actively drives interference energy to avoid sensitive frequency bands in the spectral space. This scheme unifies insulation reliability improvement and EMC performance control within the same physical response logic framework, effectively resolving the structural contradiction between insulation stress and electromagnetic interference in high-voltage power modules.

The application belongs to the technical field of polymer composites, and particularly relates to a high-voltage direct-current submarine cable insulation material and a preparation method thereof. The high-voltage direct-current submarine cable insulation material is prepared from raw materials including low-density polyethylene, fillers and functional additives. The fillers include micron fillers, submicron fillers and nanometer fillers. By selecting micron, submicron and nanometer fillers with three average particle sizes, the three fillers with different sizes construct wide-distribution trap energy levels in the matrix, effectively inhibit the injection and accumulation of space charges under a direct-current electric field, and the targeted surface modification of the three fillers can significantly improve the dispersibility and interface compatibility of the fillers. The prepared insulation material has significantly reduced space charge accumulation and controllable electric field distortion rate in a wide temperature range, and is suitable for high-voltage direct-current submarine cables.

According to the insulation protection device of the antenna feed tube current inductor, the upper small corrugated section, the middle smooth section and the lower large corrugated section are arranged on the insulation sleeve, the smooth surface of the upper corrugated section and the smooth surface of the lower large corrugated section are changed into the surfaces of the wave structures, the surface flashover length of the insulation sleeve is increased, and when the discharge distances are the same, the flashover length of the insulation sleeve is increased; the surface flashover voltage is lower than the breakdown voltage of a pure air gap, air breakdown does not occur firstly between the inner walls of the wave surfaces, surface flashover occurs on the inner edges of the wave surfaces, and the surface flashover voltage of the insulation sleeve can be remarkably increased by increasing the surface discharge length of the surface of the insulation sleeve; and the lower large corrugated section can also overcome the electric field distortion and point discharge danger caused by the electric field intensity generated after the electric part at the bottom of the base is electrified. And the middle smooth section and the current inductor are arranged at intervals, so that the voltage monitoring performance is improved, the surface of the insulating sleeve is convenient to clean, and the problem of pollution discharge caused by long-time use is solved.

The application discloses an electro-optic crystal electric field sensor based on a gradient coating design and a preparation method thereof, and relates to the technical field of optics. The electro-optic crystal electric field sensor based on the gradient coating design comprises an electro-optic crystal, a conductive layer covering the surface of the electro-optic crystal, and an antistatic layer covering the conductive layer, and the resistivity of the antistatic layer is in a gradient distribution. The conductive layer covering the surface of the electro-optic crystal can quickly collect electric charges, the antistatic layer covering the conductive layer can promote uniform distribution and rapid dissipation of the electric charges, prevent local electric field distortion, and the protective layer covering the antistatic layer provides effective physical and chemical protection without sacrificing optical performance; and the technical problem that a larger measurement error is caused by electric charge accumulation on the surface of the electro-optic crystal when the electro-optic crystal electric field sensor is used to measure a high-voltage direct-current electric field can be solved.

The invention relates to the technical field of electric wire and cable manufacturing, and discloses a conductive particle gradient distribution semi-conductive wrapping tape forming process which comprises the following steps of base material pretreatment, gradient conductive layer construction, composite emulsion coating, segmented curing and calendaring molding.The gradient conductive layer is constructed through a step-by-step impregnation method; the inner layer adopts high-length-diameter-ratio carbon nanotubes to form a moderate conduction network, the middle layer establishes a continuous conductive path through large-specific-surface-area graphene, and the outer layer realizes smooth transition of resistivity through small-particle-size carbon black, so that the stepped concentration distribution balances the interface electric field intensity, eliminates local accumulation of charges on the interface of the insulating layer, and improves the electrical conductivity of the insulating layer. Risks caused by electrical branches are suppressed, and the problem of electric field distortion caused by interlayer resistivity sudden change in the prior art is solved.

The invention discloses an ordered ferroelectric composite ceramic with high energy storage density and high temperature stability. A composite ceramic matrix is a Bi0. 5Na0. 5TiO3-based lead-free relaxor ferroelectric material, a reinforcing phase is flaky Al2O3, the mass percent of the flaky Al2O3 is xwt% Al2O3, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 And x < = 7. Flaky Al2O3 is arranged in a ferroelectric matrix in parallel through a tape casting process, and the sequential ferroelectric composite ceramic is prepared by combining a sintering process. When the flaky Al2O3 is parallel to an electrode, an applied electric field can be effectively dispersed in the whole composite ceramic matrix, so that the phenomena of electric field concentration and electric field distortion in the matrix are weakened, the breakdown strength of the composite ceramic is improved, and the energy storage density of the composite ceramic is further improved. Meanwhile, the flaky Al2O3 can effectively hinder the transmission of charges at high temperature, reduces the high-temperature leakage current density, and is beneficial to improving the high-temperature stability of the composite ceramic.

The application discloses a motor slot outlet crack propagation and dielectric performance prediction method, device, equipment and storage medium, relates to the motor insulation technical field, and the method comprises the steps of constructing a geometric model of a motor slot outlet, the geometric model comprising a stator core, a conductor and an insulator, and setting an initial electric potential field based on the voltage level of the stator core and the conductor; solving a mechanical displacement field and a phase field damage variable according to the material attribute parameters of the geometric model, and generating evolution trend data of a crack propagation path; calculating the electric damage variable and the electric field distortion data of the geometric model in the crack propagation process according to Poisson's equation, the initial electric potential field, the evolution trend data and the dielectric constant of the insulator; and obtaining a comprehensive prediction report containing a crack propagation path prediction graph and a dielectric performance degradation cloud chart according to the evolution trend data, the electric damage variable and the electric field distortion data. The application can accurately predict the motor slot outlet insulation crack propagation path and the dynamic change of dielectric performance.