3330results about "Electric component structural association" patented technology

The invention relates to the technical field of transformer harmonic monitoring, in particular to a harmonic detection and early warning system for an intelligent transformer, which obtains voltage and current signals of the transformer in real time, performs frequency domain decomposition by using Fourier transform, extracts multi-dimensional harmonic characteristics such as amplitude, phase, frequency and the like, and performs harmonic detection and early warning on the intelligent transformer. And inputting into a deep learning model to train and generate a dynamic harmonic characteristic model. On the basis, a harmonic wave anomaly classification module analyzes harmonic wave signals in real time, carries out type judgment and position association on abnormal harmonic waves, and generates a report containing anomaly types and positions. Through a dynamic early warning module, a power grid load coefficient is calculated based on power grid load state parameters collected in real time, and a harmonic detection threshold is dynamically adjusted in combination with an initially set amplitude and frequency threshold. The application of the dynamic threshold enhances the adaptability of the system to the load state change, and significantly improves the sensitivity and accuracy of harmonic detection and early warning.

The invention discloses a transformer equipment oil leakage monitoring method and system based on image recognition, relates to the technical field of image processing, and effectively eliminates static background interference by constructing a standardized image sequence S (t), performing gray gradient analysis and pixel feature extraction, recognizing candidate oil spot areas and constructing a disturbance active score Sx. The edge structure and the morphological stability coefficient of the dynamic oil stain suspected area are further extracted, and the credible level quantitative judgment of the dynamic oil stain suspected area is realized by integrating the characteristic indexes and the morphological stability coefficient, so that the dynamic identification capability and the anti-interference capability are realized; the oil leakage identification accuracy and the system automation risk response capability in a complex environment are improved, false alarm and missing alarm are effectively avoided, and the operation safety of equipment is guaranteed.

The invention discloses an acquisition and processing system and method for dry data of a transformer, and relates to the technical field of data processing. Comprising the following steps: step 1, multi-source data real-time acquisition and edge preprocessing; 2, constructing a drying end point prediction model; 3, constructing a composite objective function, and solving the composite objective function by adopting a multi-objective evolutionary algorithm; 4, performing real-time correction and feedback; according to the method, key parameters in the drying treatment process are monitored in real time, an accurate drying end point prediction model is automatically constructed, heating and air exhaust curves are dynamically optimized according to the real-time working condition and the production strategy, and traditional manual blind judgment and static presetting are replaced; and meanwhile, the operation energy consumption is remarkably reduced, the optimal balance of the energy consumption and the production efficiency is realized through a multi-objective evolutionary algorithm and an online Kalman filtering correction closed loop mechanism, the drying quality and the equipment safety are improved, the energy cost is greatly saved, and the dual requirements of modern intelligent manufacturing for flexibility, energy conservation and consumption reduction are met.

The invention discloses an anti-direct-current component nanocrystalline current transformer and a using method thereof. The anti-direct-current component nanocrystalline current transformer comprises a current transformer body, and a magnetic core hole penetrating front and back is formed in the middle of the front side of the current transformer body. The device is provided with a secondary side open circuit detection and protection mechanism, so that imbalance of a magnetic field in the mutual inductor caused by disconnection of a secondary loop is effectively prevented, iron core magnetic flux saturation and potential high electromotive force generation are avoided, the safety of the mutual inductor and peripheral equipment is protected, the risk of power system faults such as fire disasters or short circuits is reduced, and meanwhile, the safety of the mutual inductor is improved. A live wire centering fixing mechanism is arranged, so that the stable centering position of a wire in a magnetic core hole of the mutual inductor is ensured, magnetic field distribution is optimized, the magnetic leakage phenomenon is reduced, the accuracy and stability of current measurement are remarkably improved, meanwhile, measurement fluctuation caused by wire shaking is reduced, and the measurement precision is improved. And more accurate data support is provided for harmonic analysis, fault detection and electric energy quality monitoring of a power system.

The invention discloses a high-safety station explosion-proof transformer and a using method, and relates to the technical field of transformers. The explosion-proof transformer comprises a transformer body arranged in an explosion-proof shell, a plurality of cooling fins are arranged on the side portion of the transformer body, the explosion-proof transformer further comprises a pressure relief unit, the pressure relief unit comprises a plurality of pressure relief boxes arranged in the explosion-proof shell, and a pressure relief assembly is arranged in each pressure relief box; a pressure monitoring sensor for monitoring and releasing the internal pressure of the transformer main body is arranged in the pressure relief assembly, and an adjusting assembly and a heat dissipation assembly are arranged on each pressure relief box. The transformer has the advantages that multi-point pressure monitoring can be carried out on the interior of the transformer body, whether high voltage occurs in the transformer body or not is monitored in real time, targeted pressure relief and explosion prevention can be carried out on a high-voltage part after the high voltage is monitored, the heat dissipation range and the heat dissipation efficiency can be improved in a targeted mode according to the pressure relief condition, and the heat dissipation efficiency is improved. Synchronous explosion-proof treatment of the inside and the outside is realized, and the explosion-proof safety is higher.

According to the intelligent fire extinguishing system for the transformer, internal and external data of the transformer are collected in real time through a sensor module, the collected data are preprocessed through a data processing and model module, and a large model architecture based on Transform and a multi-head self-attention mechanism are adopted; the current temperature state and the future temperature change trend of the transformer are predicted in real time, risk assessment and anomaly detection are carried out, multi-stage temperature threshold values are set in the system, real-time data processing and model optimization are achieved through an edge computing and cloud computing cooperation module, the response speed and prediction accuracy of the system are improved, and the system reliability is improved. The infrared monitoring module monitors the temperature change and the fire condition outside the transformer in real time and accurately detects a fire or an abnormal high-temperature area, and when the fire is detected or a dangerous-level temperature early warning is received, the fire extinguishing module starts the non-pressure-storage fire extinguisher, sprays a fire extinguishing agent and rapidly extinguishes a fire, so that the safety and reliability of the transformer are enhanced, and the safety of the transformer is improved. And the operation cost is reduced, and the application prospect is wide.

The invention relates to the field of transformers, and discloses a dry-type power transformer and a using method.The dry-type power transformer comprises a supporting base, a protection box is installed on the top of the supporting base, openings are formed in the two sides of the protection box, the protection box is hinged to a box door through hinges, and through openings are formed in the two side walls of the protection box; a first dustproof mechanism and a second dustproof mechanism are installed at the positions of the through openings respectively, a supporting seat is fixedly installed at the top of the supporting base, a transformer body is fixedly installed on the supporting seat, two symmetrical supporting columns are arranged at the top of the supporting base, and a moving mechanism is installed at the top ends of the supporting columns. The first dustproof mechanism and the second dustproof mechanism are arranged on the two sides of the protection box, and a first dustproof net and a second dustproof net in the first dustproof mechanism and the second dustproof mechanism can be replaced conveniently, so that the use flexibility of the equipment is improved.

The present application provides a synchronous rectification assembly, a manufacturing method thereof and a power supply. The synchronous rectification assembly comprises a first circuit board, a transformer, an electrical connection piece and a second circuit board; wherein the transformer is electrically connected to the first circuit board, and the second circuit board is provided with a conductive contact for being electrically connected to an external apparatus, and the electrical connection piece is electrically connected to the first circuit board and the second circuit board respectively; the first circuit board is configured to perform synchronous rectification on the output signal of the transformer and then transmit the output signal to the conductive contact of the second circuit board through the electrical connection piece. The present application can solve the problem that the output signal outputted by the transformer in the existing synchronous rectification assembly has a large loss during transmission.

The invention discloses a load-variable ultra-large-capacity dry-type transformer, and relates to the technical field of dry-type transformers, the load-variable ultra-large-capacity dry-type transformer comprises three groups of main iron core columns and three groups of auxiliary iron core columns, the section of each main iron core column is in a stepped shape, and three layers of amorphous alloy belts are laminated in each main iron core column; the thickness of the middle layer of the three layers of amorphous alloy belts is set to be 1.2-1.5 times that of the two side layers, and independent lap joint pieces are arranged at the joints of the lamination sets in the auxiliary iron core column. The stepped sections of the three groups of main iron core columns are combined with the magnet yokes with thin tops and thick bottoms, so that the magnetic flux density is uniformly distributed, the capacity of a single column is improved, the problems that the capacity of a single traditional dry-type transformer is limited and the whole transformer needs to be replaced during capacity expansion are solved, the occupied area is reduced through modular splicing, the capacity of a single group of iron core columns is increased, and the no-load loss is reduced.

The invention discloses a transformer explosion-proof protection device suitable for an extreme environment, and belongs to the field of oil-immersed transformers, the transformer explosion-proof protection device comprises a mounting rack, the upper surface of the mounting rack is fixedly connected with a transformer body, and the front side and the rear side of the upper surface of the transformer body are provided with a second binding post and a first binding post respectively; the front side and the rear side of the transformer body are fixedly connected with cooling fins. When the pressure in the transformer body reaches a certain threshold value, the piston pushes the sealing cover to move upwards, the sealing cover is arranged, the situation that the activated carbon plate is exposed in the natural environment for a long time, a large amount of dust and impurities are attached to the surface of the activated carbon plate, and consequently the activated carbon plate is blocked is avoided, and meanwhile the activated carbon is prevented from losing efficacy due to excessive dust adsorption; the efficiency of absorbing hydrogen and methane is reduced, purification and absorption are carried out through the activated carbon plate, hydrogen and methane in the gas are absorbed, pollution-free emission is carried out, and the influence of hydrogen and methane on the surrounding environment is avoided.

The utility model discloses a transformer with high heat dissipation performance, and relates to the technical field of transformers. The transformer comprises a transformer body, heat dissipation fins are fixedly arranged on the side wall of the transformer body, a bottom plate is fixedly arranged on one side of the bottom of the transformer body, and a cooling box is installed on the upper surface of the bottom plate. Cooling water flows from the first cooling water pipe, heat on the heat dissipation fins can be taken away, the temperature of the heat dissipation fins can be reduced, the cooled heat dissipation fins can conveniently and efficiently absorb heat to the transformer body to cool the transformer body, the cooling water flows into the second cooling water pipe, and the heat dissipation effect of the transformer body is improved. At the moment, the heated cooling water flows in the second cooling water pipe, and the cooling water in the second cooling water pipe is cooled by the fan, so that the temperature of the cooling water absorbing heat is reduced, heat on the cooling fins can be better cooled during water circulation, and the cooled cooling fins can more effectively cool the transformer body.

Disclosed embodiments may include systems, devices and methods for fabricating high-density charge-storage devices and power conversion devices. In one embodiment, a device is disclosed, comprising an inductor. The inductor includes a first inductor surface and a second inductor surface opposite the first inductor surface. The inductor further includes a first inductor substrate including a cavity. A seed layer is formed on a bottom surface of the cavity, and a magnetic layer is formed on the seed layer. The magnetic layer includes a plurality of stacked magnetic layers separated from each other by an insulating material layer.

The invention relates to the field of transformers, in particular to an epoxy resin pouring dry-type transformer which comprises an upper clamping piece, a lower clamping piece, a warning assembly and a plurality of main coils, connecting rods are connected between the adjacent main coils in a crossed mode, the warning assembly comprises a warning plate, a first contact switch, a warning lamp and a plurality of thermal expansion and cold contraction blocks, and a sliding cavity is formed in the surface of the lower clamping piece. The multiple thermal expansion and cold contraction blocks are connected to the surface, facing the connecting rods, of the warning plate at intervals, the ends, away from the warning plate, of the thermal expansion and cold contraction blocks correspond to the connecting rods one to one and are connected with the connecting rods, the warning lamp is connected to the surface, facing the connecting rods, of the warning plate, and the first contact switch is connected to the inner wall of the sliding cavity and electrically connected with the warning lamp. According to the epoxy resin pouring dry-type transformer, the warning board, the first contact switch, the warning lamp and the heat expansion and cold contraction block are arranged, the warning lamp is powered on and emits light, pedestrians are warned not to touch the outer wall of the epoxy resin pouring dry-type transformer by mistake and are not bumped or scalded, and therefore the using safety of the epoxy resin pouring dry-type transformer is improved.

A magnetic component and a switch power supply device are disclosed. The magnetic component includes a magnetic core and at least three windings, the magnetic core including at least three winding columns, at least one side columns, a first cover plate and a second cover plate opposite to each other, wherein the at least three winding columns are sequentially arranged in adjacent, the first cover plate and the second cover plate are respectively at upper parts or lower parts of the at least three winding columns and the at least one side column to form a closed magnetic flux loop; the at least three windings are wound on the at least three winding columns, respectively; wherein magnetic flux direction of the middle winding column in adjacent three winding columns is opposite to magnetic fluxes direction of the other two winding columns in adjacent three winding columns.

The invention relates to the technical field of transformers, in particular to a high-safety transformer which comprises a transformer body and a monitoring mechanism, and the monitoring mechanism comprises a processor, a base, a control core, a driving wheel and a visual assembly. The base is provided with a containing cavity, an input flow channel and an output flow channel, the input flow channel and the output flow channel extend to the containing cavity, and the other ends of the input flow channel and the output flow channel communicate with an oil tank. A filtering assembly is arranged in the output flow channel, and the visual assembly is embedded in the inner wall of the output flow channel. The control core is rotationally matched with the containing cavity and provided with a radial through hole, and a control rod is arranged in the radial through hole in a sliding fit mode. The driving wheel is rotatably matched with the base. One end of the control rod is eccentrically hinged to the driving wheel. The visual component is used for acquiring image data of the surface of the filter component, and the processor is used for evaluating the impurity content in the insulating oil according to the impurity quality of the surface of the filter component. According to the utility model, the automatic monitoring of the insulating oil can be realized in the operation process, prompts can be given out in time, and the safety supervision strength is effectively improved.

The invention discloses an amorphous alloy transformer with a buffer protection function, and relates to the technical field of transformers, a plurality of protection springs are installed at the bottom end of the inner side of an outer fixing integration box at equal intervals, an inner fixing treatment box is fixed to the top ends of the protection springs, and a top sealing fixing plate is fixed to the top end of the inner fixing treatment box; the fixed dampers are symmetrically installed at the bottom end of the inner side of the outer fixed integration box, and the elastic rubber blocks are installed at the top ends of the fixed dampers. The problems that in the prior art, due to factors such as magnetic field changes, electromagnetic force imbalance and uneven cooling speeds of silicon steel sheets and windings, equipment generates large-amplitude vibration and noise are effectively solved; according to the invention, the equipment is prevented from generating resonance reaction due to the influence of vibration and noise, so that the protection treatment of transformer parts is realized, the damage speed of the parts is reduced, the circulating cooling and the three-section linkage cooling are matched, the temperature of the transformer during continuous operation is effectively reduced, and the service life of the transformer during operation is prolonged.

The invention discloses an electric reactor with internal coil stabilization and auxiliary heat dissipation, and relates to the technical field of coil stabilization, the electric reactor comprises a base, the top surface of the base is fixedly connected with an air-core electric reactor body, the outer surface of the air-core electric reactor body is provided with a coil body, and the top surface of the base is provided with a coil stabilization mechanism for preventing the coil from loosening. An auxiliary heat dissipation mechanism used for assisting heat dissipation of the reactor is arranged on the top face of the base, the coil stabilizing mechanism can clamp a loose coil, pressure can be applied more evenly through clamping and fixing, the coil is more stably fixed, the consistency of the shape and performance of the coil can be kept, and the service life of the reactor is prolonged. The clamping device can avoid direct compression and damage to an insulating layer of the coil, the insulating performance of the coil can be protected, the auxiliary heat dissipation mechanism can scrub the interior of the electric reactor, remove dust and sundries in the electric reactor, reduce heat resistance, improve heat dissipation efficiency and keep the electric reactor to operate within the normal working temperature range.

The invention relates to the technical field of transformers, in particular to a transformer with a high-temperature early warning device, which comprises a base and a transformer body fixedly mounted on the base, and further comprises a temperature control system, and the temperature control system is used for monitoring the temperature of the transformer body and dynamically analyzing the transformer body. A plurality of sets of cooling fins are fixedly connected to the outer portion of the transformer body, and a plurality of sets of mounting frames are fixedly connected to the base. In the invention, aiming at the defect of incomplete monitoring of a traditional temperature sensor, the temperature control system can realize comprehensive temperature monitoring and dynamic operation analysis of the transformer body, accurately capture internal complex temperature field distribution, and avoid the problem of insulation aging acceleration caused by local high-temperature leak detection; compared with an existing single threshold value control mode, intelligent early warning is achieved through a dynamic analysis technology, a control strategy can be adjusted according to real-time temperature changes, and the limitation that a traditional method lacks state perception is overcome.

The invention discloses a low-loss double-reverse-star rectifier transformer for a hydrogen production system, and relates to the technical field of double-reverse-star rectifier transformers, the low-loss double-reverse-star rectifier transformer comprises a box body, cooling fins, a coil, a connector lug, a supporting box and a cooling module, the cooling fins are installed on the outer wall of the box body, the coil is installed on the inner wall of the box body, the connector lug penetrates through the top of the box body, and the supporting box is arranged in the box body. One end of the connector lug is connected with the outer wall of the coil, and a supporting box is installed on the outer wall of the box body. The oil pump is started to suck transformer oil in the box body into the continuous bow-shaped pipe, at the moment, the first fan is started to generate wind power to blow to the surface of the continuous bow-shaped pipe, so that the transformer oil in the continuous bow-shaped pipe is cooled, and the cooled transformer oil enters the box body again through the discharge head; at the moment, a first motor rotates to drive a first beating head to rotate, the first beating head rotates to drive a T-shaped frame to move, the T-shaped frame moves to drive a first spring to move, and the first spring moves to enable the T-shaped frame to drive a ram to move.

The invention discloses an automatic voltage regulation method and device for a portable on-load transformer, and the method comprises the steps: collecting images corresponding to a push rod when a gear-shifting knob of the on-load transformer is located at different gears in the process that the push rod of a gear-shifting mechanism pushes the gear-shifting knob for gear shifting, so as to build a feature image library of the images of the push rod under each gear; when gear adjustment is carried out each time, whether gear adjustment is completed or not is comprehensively judged according to the resistance change condition of swing of the push rod when the gear adjustment knob is pushed and the push rod image collected in real time, and the current push rod image collected when gear adjustment is completed is compared with the image of the corresponding gear in the feature image library to determine whether gear adjustment is correct or not. Whether the gear shifting process is completed or not can be comprehensively judged, and the accuracy of each gear shifting operation is ensured; the gear corresponding to the current push rod is accurately recognized, so that whether the gear is correctly shifted to the target gear or not is accurately judged, the gear recognition precision is high, and the reliability is high.

In the current transformer, a plurality of PCBs (printed circuit boards) are distributed on a magnetic iron core framework, welding spots, integrating resistors and damping resistors are welded on the PCBs, the welding spots are used for connecting winding wires, the winding wires are uniformly wound among the welding spots on the magnetic iron core framework according to the number of turns at intervals to form windings, and the winding wires are wound on the magnetic iron core framework. The number of spaced turns is associated with the damping resistance. According to the patch damping resistor type broadband self-integration Rogowski coil current transformer, the resonance phenomenon of the coil can be suppressed, and the bandwidth of the self-integration Rogowski coil current transformer is increased to a large extent.

The invention belongs to the technical field of transformer heat dissipation control, and particularly discloses a transformer operation intelligent heat dissipation control system, which comprises a heat dissipation equipment layout module, a temperature monitoring module, a hot spot identification module, a hot spot diffusion analysis module, an airflow control module and an execution feedback module which are sequentially coupled and connected, an infrared thermal imaging sensor array and a fan group are arranged in a transformer according to heat source distribution, surface temperature distribution is collected in real time through the infrared thermal imaging sensor array, and a hot spot area and the diffusion direction of the hot spot area are recognized; and upstream, midstream and downstream fans are selected, and a directional relay cooling airflow chain is constructed through time sequence difference pulse and rotating speed hierarchical control, so that prospective intervention on a current hot spot and a potential diffusion path is realized, heat dissipation control has local accurate regulation and control capability with dynamic evolution characteristics, and the fan energy consumption is reduced while the heat dissipation efficiency is improved.

The invention provides a self-monitoring transformer, and belongs to the technical field of transformers. Wherein the piston is arranged on the first reference pipe, and the piston rod penetrates through the sealing plate. The filter plate is arranged in the first reference pipe. The piston rod is provided with a conveying flow channel, and the area between the piston and the filter plate is communicated with the conveying flow channel. A first one-way assembly is arranged in the conveying flow channel. A second one-way assembly is arranged at the end, away from the sealing plate, of the first reference pipe. The plug rod is driven by the driving assembly in a reciprocating mode. The visual assembly is arranged in the first reference tube. The processor is used for judging the health degree of the insulating oil in the transformer body according to the image data acquired by the visual assembly. The transformer insulating oil monitoring system can continuously and autonomously monitor the actual condition of the transformer insulating oil, avoids the defects of manual monitoring, and effectively improves the operation safety of the transformer.

The invention relates to the technical field of reactors, in particular to a three-dimensional magnetically controlled reactor and a temperature control device thereof, and the temperature control device of the three-dimensional magnetically controlled reactor is used for controlling the temperature of the three-dimensional magnetically controlled reactor. The three-dimensional magnetically controlled reactor comprises a rack, an iron core is vertically arranged on the rack, heat dissipation fins, a liquid cooling pipe and a winding are sequentially and spirally wound on the iron core, the heat dissipation fins are arranged to be of a C-shaped strip-shaped structure, and openings of the heat dissipation fins are arranged outwards; the liquid cooling pipe and the winding are inserted into the heat dissipation fins, and the liquid cooling pipe is located on the inner side of the winding and filled with heat absorption fluid. During use, the cooling fins can isolate the winding and the iron core from each other, and abrasion of an insulating layer on the winding is reduced; the liquid cooling pipe not only can realize heat dissipation from inside to outside, but also can improve the heat dissipation effect, and when the heat absorption fluid is introduced into the liquid cooling pipe, the liquid cooling pipe expands, so that the heat dissipation fins and the winding can be simultaneously propped against, on one hand, the heat dissipation area of the iron core can be increased, and on the other hand, the stability of the winding can be improved.

The invention relates to a power transformer with an active anti-deflagration function and a monitoring method. The power transformer comprises a transformer oil tank, an ascending flanged base, a high-voltage bushing, a short-circuit copper sheet, a neutral point bushing, a high-frequency sensor and an ultrasonic sensor. The ascending flanged base and the neutral bushing are connected to the top of the transformer oil tank; one end of the high-voltage bushing is connected with the ascending flanged base through a bolt; two ends of the short-circuit copper sheet are respectively connected with two ends of any bolt; the neutral point bushing is grounded through a grounding wire; and the high-frequency sensor is respectively connected in series with the short-circuit copper sheet and the grounding wire. The ultrasonic sensors are arranged in the ascending flanged base and the transformer oil tank respectively, and the ultrasonic sensors in the transformer oil tank are distributed on the upper portion, the middle portion and the lower portion of the transformer oil tank. According to the power transformer, two kinds of partial discharge signals at different positions are collected, whether discharge occurs at different positions in the transformer or not is accurately judged in combination with a logic judgment method, the severity degree is judged, and therefore early warning or tripping instructions are accurately output at the initial stage of a fault to remove the fault, and operation safety is ensured.

A high-integration-level carrier plate includes at least two prefabricated printed circuit board lamination layers, at least one hollowed-out area is formed in the printed circuit board lamination layer, the hollowed-out areas are embedded in the carrier plate, the printed circuit board lamination layers are fixedly connected through an insulating bonding dielectric layer and are electrically connected through at least one bonding material piece, and at least one power supply circuit assembly is arranged in the hollowed-out area; the printed circuit board lamination layer comprises at least a part of windings, and the windings and the magnetic cores are used for forming magnetic elements in the power supply circuit assembly through mutual cooperation.

The invention discloses an oil-immersed transformer with an explosion-proof protection structure, the oil-immersed transformer comprises an explosion-proof box body and an oil-immersed transformer installed in the explosion-proof box body, the top of the explosion-proof box body is fixedly provided with a small nitrogen generator, and the inner top wall of the explosion-proof box body is fixedly provided with a gas pipe; a pipeline on the small nitrogen generator is communicated with the interior of the gas pipe, the gas pipe is connected with a branch pipe communicated with the interior of the gas pipe, the branch pipe is fixedly provided with a first electric control valve, the gas pipe is provided with a second electric control valve, and the second electric control valve is located at the bottom of the branch pipe. In the aspect of flame retardance, the flame-retardant assembly is unique in design, and the movable plate, the expansion air bag, the storage box and other components are matched ingeniously. When fire extinguishing dry powder exists in the storage box and the inner wall is inclined, overheated or abnormally burnt, the push rod pulls the movable plate, nitrogen in the expansion air bag enters the storage box, the dry powder is blown out to form dry powder cloud, flames are effectively restrained, the explosion possibility is reduced, and reliable flame-retardant protection is provided for the oil-immersed transformer.

The invention relates to the technical field of transformers, and discloses a high-stability transformer which comprises a base support, an iron core and a winding, clamping plate assemblies are fixedly installed on the front side and the rear side of the iron core, the lower ends of the clamping plate assemblies are fixedly connected with the base support, an iron core column of the iron core is sleeved with the winding, and a resonance choking mechanism is installed on the iron core. The resonance choking mechanism comprises an upper pressing plate, a lower pressing plate, an inhaul cable and a balancing weight. According to the high-stability transformer, the resonance choking mechanism, the upper pressing plate and the lower pressing plate are arranged on the iron core to serve as boundary supports of the iron core, so that vibration of the iron core is reduced, the vibration of the iron core is transmitted to the inhaul cable and the balancing weight, the balancing weight generates vibration in the direction opposite to that of the iron core, vibration energy of the iron core is counteracted according to the law of conservation of energy, and the stability of the transformer is improved. The natural vibration frequency of the iron core is prevented from being close to the magnetostrictive vibration frequency of the silicon steel sheet, resonance is avoided, the noise of the transformer is reduced, and the transformer runs more stably.

In an embodiment a choke module includes a choke with a magnetic core and at least two windings, a thermally conductive pad, and a footprint capacitor, which is a plate capacitor, and which is configured to provide a mechanical support for the choke, wherein the footprint capacitor comprises at least one first electrode layer, at least one dielectric layer and at least one second electrode layer located one above the other, wherein the choke is located on the footprint capacitor, wherein an upper surface of the footprint capacitor faces the choke, and wherein the thermally conductive pad is arranged on the upper surface of the footprint capacitor.

A coil assembly for wireless electrical power transmission includes a plurality of external connecting terminals, a power feeding coil, a resonant capacitor electrically connecting with the power feeding coil, and busbars each of which electrically connects between the external connecting terminals.