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12results about How to "Improve insulation life" patented technology
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Epoxy resin pouring type transformer with built-in microcirculation cooling channel and heat dissipation method of epoxy resin pouring type transformer
PendingCN121839383ATake away accuratelyTake away efficientlyTransformers/inductances coolingTransformers/inductances coils/windings/connectionsEpoxyVacuum casting
The invention relates to an epoxy resin pouring type transformer with built-in microcirculation cooling channels and a heat dissipation method of the epoxy resin pouring type transformer, and belongs to the technical field of power transformers. The epoxy resin pouring type transformer comprises an iron core, a low-voltage winding, a high-voltage winding and a heat dissipation shell, the low-voltage winding and the high-voltage winding are completely impregnated and wrapped by an epoxy resin composite material through a vacuum pouring process, an integrated epoxy resin pouring body is formed after curing, and a three-dimensional communicated bionic microcirculation cooling channel network is arranged in the epoxy resin pouring body; the heat dissipation shell is in close contact with the outer surface of the epoxy resin pouring body through the high-heat-conductivity insulating medium. According to the invention, the heat dissipation efficiency can be remarkably improved, and a cooling medium (air) is directly guided to a microscopic area around the winding conductor through a three-dimensional communicated and tree-shaped fractal bionic microcirculation cooling channel network, so that the effective heat exchange area and the heat exchange strength are greatly increased, and internal heat can be accurately and efficiently taken away.
Owner:JIANGSU HANON ELECTRIC
Free silanol group-containing surface-treated silica sol dispersed in nitrogen-containing solvent, and insulating resin composition
Provided is a silica sol in which silica particles are dispersed in a nitrogen-containing solvent for mixing with polyimide-based and polyamide-based polar resins in a state of good compatibility, said silica sol being capable of being subjected to additional silane treatment according to the use or the like, having excellent storage stability at a high concentration, and having both customizability and reliability. The silica sol contains silica particles having an average particle diameter of 5-100 nm obtained by a dynamic light scattering method and having an organic group containing an unsaturated bond between carbon atoms bonded to the surface, and a nitrogen-containing solvent, the amount of organic groups that are bound to the surfaces of the silica particles and that contain unsaturated bonds between carbon atoms is 0.1-2.0 per unit area of the surfaces of the silica particles, the concentration of the silica particles is 25-70 mass%, and free silanol groups are present on the surfaces of the silica particles. The amount of free silanol groups present per unit area on the surface of the silica particles is 0.4-1.2 per nm2.
Owner:NISSAN CHEM CORP
Outdoor oil-immersed transformer convenient for heat dissipation
PendingCN121964337AImprove operational safetyImprove operational reliabilityTransformers/inductances coolingTransformers/inductances casingsThermal dilatationTransformer
The invention discloses an outdoor oil-immersed transformer convenient for heat dissipation, and relates to the technical field of transformers, the outdoor oil-immersed transformer comprises a box body and a transformer body fixedly mounted at an inner cavity of the box body, a rainproof cover is fixedly mounted at the top of the box body, and fans are fixedly mounted on two sides of the box body; heat dissipation mechanisms are installed on the two sides of an inner cavity of the box body, cooling mechanisms are installed on the heat dissipation mechanisms, a liquid limiting plate is fixedly connected between the heat dissipation mechanisms, and a floating guide pipe is fixedly installed on the top of the liquid limiting plate. According to the outdoor oil-immersed transformer facilitating heat dissipation, automatic opening and closing of an oil duct are achieved through thermal expansion of oil in the cooling mechanism, oil circulation heat dissipation can be completed without external electric drive, the heat dissipation mechanism is arranged in the inner cavity of the transformer box, air cooling is guaranteed, outdoor dust can be effectively prevented from entering the box to be accumulated, and the heat dissipation efficiency is improved. And dust accumulation and blockage of the cooling fins and the heat exchange pipe wall are avoided, heat resistance is increased, maintenance and cleaning frequency is reduced, and the device is suitable for outdoor severe dust raising environments.
Owner:XUZHOU PENGCHENG ELECTRIC CO LTD
Motor temperature control method based on environment monitoring
The application discloses a motor temperature control method based on environment monitoring and belongs to the technical field of motor temperature control, which comprises the following steps: S1, multi-source data synchronous acquisition: the working temperature T1 of a motor body, the environment temperature T2 of an environment where the motor is located, the running current I of the motor and the heat dissipation state signal S representing the state of a heat dissipation system are synchronously acquired in real time, the heat dissipation state signal S is the temperature of a radiator, the flow of cooling liquid or the rotating speed of a heat dissipation fan, S2, multi-source temperature coupling analysis and feature extraction: based on the real-time data collected in step S1, coupling calculation is performed to generate an environment normalized temperature rise index and a heat balance deviation index for representing the abnormal state of the system heat, S3, fault root cause discrimination and classification: the environment normalized temperature rise index and the heat balance deviation index calculated in step S2 are used for fault root cause discrimination and classification. The application realizes the motor temperature control based on environment monitoring, realizes the transition from fuzzy perception, extensive control to accurate diagnosis and can realize intelligent intervention.
Owner:BEIJING SHENWEI ZHILIAN TECHNOLOGY CO LTD
A double-suction centrifugal pump with a built-in driving mechanism
PendingCN122523281ALess driverachieve self-balancing
The application provides a double-suction centrifugal pump with a built-in driving mechanism, and belongs to the field of fluid delivery and special motor combination. The application comprises a split pump shell, an impeller, a pump shaft and a built-in driving mechanism. The pump shaft is fixed inside the pump shell, and two impellers are symmetrically sleeved on the pump shaft and can rotate around the pump shaft. The built-in driving mechanism is an axial flux motor structure, comprising a magnet and an induction coil. The induction coil is fixed on the pump shaft and located between the two impellers, and the magnet is embedded in each of the two impellers. A rotating alternating magnetic field is generated by electrifying the induction coil, which drives the impellers with the magnets on both sides to rotate synchronously around the stationary pump shaft, so as to realize the delivery of fluid. The application realizes the self-balancing of axial magnetic force, significantly reduces the axial load of the water-lubricated bearing, and prolongs the service life of the bearing and the whole machine.
Owner:SHIMGE PUMP IND (ZHEJIANG) CO LTD
An insulation protection structure for motor stator slot coils
ActiveCN224626360UEliminate creepagePrevent electrical short circuits
This utility model discloses an insulation protection structure for stator slot coils of an electric motor, comprising: a copper flat wire coil passing through a stator winding slot and wound in a zigzag pattern on the stator, the portion of the copper flat wire coil located within the stator winding slot forming an effective edge; an insulating partition clamping adjacent copper flat wire coils within the same slot; a U-shaped insulating plate embedded in the stator winding slot, the slot opening of the U-shaped insulating plate facing the same direction as the slot opening of the stator winding slot; and an insulating plug located at the slot opening of the stator winding slot, the insulating plug sealing the slot opening of the U-shaped insulating plate to insulate and surround the effective edge of the copper flat wire coil, with the plug head body of the insulating plug embedded in the slot opening of the U-shaped insulating plate and pressing the effective edge. This utility model solves the problems of insufficient insulation protection for the coil within the stator slot and unreliable fixation of the effective edge by forming an insulating cavity through the U-shaped insulating plate and the insulating plug, and in conjunction with a soft plug pressing structure.
Owner:无锡欧瑞京机电有限公司
Regulation inertia type grid-connected device for reducing motor voltage to ground and control method
ActiveCN121440748BReduce the voltage to groundavoid signal distortionElectronic commutation motor controlVector control systemsConvertersElectric machine
This invention discloses an inertia-adjustable grid-connected device and control method for reducing motor-to-ground voltage. The device comprises an even number of motor grid-connected interface devices connected in series between the positive and negative buses of a bipolar DC-DC converter. The intermediate node of each even number of motor grid-connected interface devices is grounded to reduce the motor-to-ground voltage. Each motor grid-connected interface device includes a doubly-fed induction generator (DFIG), a first DC / AC converter, a permanent magnet synchronous motor (PMSM), and a second DC / AC converter. The positive terminal of each motor grid-connected interface device is connected to the positive DC side of both the first and second DC / AC converters, and the negative terminal is connected to the negative DC side of both the first and second DC / AC converters. This invention aims to reduce the ground voltage of both the DFIG and PMSM, lower insulation requirements, extend insulation life, and improve the stability and reliability of the electrical system.
Owner:HUNAN UNIV
A rotor coil winding frame for a brushless generator
ActiveCN224596249UAvoid slight slippage between layersAvoid whip tip deformation
This utility model discloses a rotor coil winding frame for a brushless generator, including a rotor shaft, a modular assembly frame, rotor windings, and end caps. The rotor shaft has axially spaced mounting slots along its axial direction. One end of the modular assembly frame has an arc-shaped outer protective cover extending from its sidewall, with an axial locking pin at the end of the outer protective cover. The other end of the modular assembly frame has a guide sliding part that inserts into the axial mounting slots. The rotor windings are fitted onto the modular assembly frame. The rotor shaft passes through the center of the end cap, which has multiple locking holes. The axial locking pins and locking holes cooperate to fix the windings. This utility model provides a rotor coil winding frame for a brushless generator, which facilitates winding, provides high rigidity radial constraint, and supports partial replacement and repair.
Owner:FU JIAN YI LI DIAN LI KE JI GU FEN YOU XIAN GONG SI
Multilayer gradient type arc-resistant grading ring
ActiveCN224190738UImprove insulation lifeReduce the risk of failureInsulatorsElectrical field strengthPotential difference
The utility model discloses a multilayer gradient type arc-resistant grading ring, and relates to the technical field of grading rings. Comprising a first grading ring, a second grading ring is arranged above the first grading ring, a third grading ring is arranged above the second grading ring, connecting devices are clamped to the outer walls of the first grading ring, the second grading ring and the third grading ring, fixing devices are clamped to the outer walls of the connecting devices, and mounting buckles are lapped to the outer walls of the connecting devices; the multi-layer gradient diameter design is matched with the electric field distribution characteristics of the high-voltage equipment, and the potential difference is balanced layer by layer from a top strong electric field area to a lower weak electric field area, so that the local electric field intensity is reduced, arc discharge is inhibited, and concentrated discharge is avoided; the transportation difficulty and the occupied space are reduced, and the installation process is simplified through the modes of clamping, bolt fixing and the like in combination with the pre-assembly function of the elastic piece and the limiting device during installation.
Owner:扬州硕宇高压电气有限公司
Plasma-controlled oriented boron nitride high-frequency transformer functional insulating material, preparation method and use thereof
ActiveCN121922443BImprove the interface binding forceachieve enrichmentTransformers/inductances coils/windings/connectionsInsulating bodiesUltra high speedElectrical conductor
The application provides a high-frequency transformer functional insulating material of plasmonic orientation boron nitride and a preparation method and application thereof, and relates to the technical field of insulating materials. The functional insulating material is obtained by sequentially covering, from an inner layer to an outer layer, a thermosetting resin matrix layer, a silicon-rich transition layer, an oriented boron nitride sheet layer, a boron nitride gradient insulating layer and a densified surface layer on the surface of a metal conductor. The insulating material can realize heat diffusion enhancement, electric field distribution homogenization and space charge inhibition, and exhibits high breakdown strength, high local discharge starting voltage and good long-term insulating stability under high-frequency non-sinusoidal voltage, and is suitable for insulating reinforcement of the winding end, the outgoing line end and the core clamping piece area of a high-frequency transformer of a super-speed train, and has a good application prospect.
Owner:SOUTHWEST JIAOTONG UNIV
Auxiliary partition and fixing structure for a transformer
ActiveCN224400177UImprove stabilityImprove reliabilityTransformers/reacts mounting/support/suspensionTransformers/inductances coils/windings/connectionsEpoxyTransformer
The utility model discloses a kind of auxiliary partition and fixing structure for transformer, it is related to transformer technical field.The utility model includes transformer body, the transformer body top is provided with phase interval board subassembly, the phase interval board subassembly includes insulating plate and insulating support frame, the phase interval board subassembly one side is provided with clamp piece, the clamp piece quantity is two, and side beam subassembly is provided between two the clamp piece.The utility model improves insulating partition effect by adopting diphenyl ether plate to replace traditional epoxy resin, reduces phase-to-phase insulation distance, saves space, is conducive to the miniaturization development of transformer, while enhancing impact resistance, prolongs the service life of transformer, the " mouth " frame of side beam subassembly and clamp piece bolt lock, constitute closed loop stress system, disperse horizontal vibration stress, restrain clamp piece end deformation, guarantee stress uniform, increase the load bearing of coil, improve transformer overall stability and reliability.
Owner:CHANGZHOU HUADI SPECIAL TRANSFORMER CO LTD
Thermal insulation sheath at three-way joint
ActiveCN224079821UImprove assembly efficiencyImprove Assembly ConsistencyThermal insulationPipe protection by thermal insulationThermal insulationMechanical engineering
Owner:SHANGHAI AMAP MACHINERY TECHNOLOGY CO LTD