1071results about "Transformers/inductances details" patented technology

Devices methods for triggering alarms and cautions for electrical equipment may include receiving, at edge device, data of an electrical device, including dissolved gas data or electrical data; setting, based on a comparison of a measurement value of the data to an upper rolling window-based threshold or to a lower rolling window-based threshold, a measurement flag for the electrical device; determining a rate-of-change (RoC) of the data; setting a RoC flag for the electrical device based on a comparison of the RoC to a delta RoC-based threshold; determining an acceleration of the data; setting an acceleration flag for the electrical device based on a comparison of the acceleration to a percentile log-ratio change of measurements threshold; and setting one of a no flag, a caution flag or an alarm flag for the electrical device based on the measurement flag, the ROC flag, and the acceleration flag.

A magnetic alignment system can include a primary annular magnetic alignment component and a secondary annular magnetic alignment component. The primary alignment component can include an inner annular region having a first magnetic orientation, an outer annular region having a second magnetic orientation opposite to the first magnetic orientation, and a non-magnetized central annular region disposed between the primary inner annular region and the primary outer annular region. The secondary alignment component can have a magnetic orientation with a radial component. Additional features, such as a rotational magnetic alignment component and / or an NFC coil and circuitry can be included.

To provide an inductor for use in an aerosol provision device.SOLUTION: The inductor includes an electrically conductive element and a secondary coil. The element includes an electrically conductive non-spiral first portion 601 coincident with a first plane, an electrically conductive non-spiral second portion 602 coincident with a second plane that is spaced from the first plane, and an electrically conductive connector 603 that electrically connects the first portion 601 to the second portion 602. The electrically conductive element is configured such that, when a varying electrical current is applied to the electrically conductive element, a corresponding varying electrical current is induced in the secondary coil.SELECTED DRAWING: Figure 6

The signal transmission device includes first, second and third chips. The first and second chips includes respectively: a first input pad; an ADC that converts a first analog signal inputted to the first input pad into a first digital signal; a first transmission circuit that generates a first pulse signal in correspondence to the first digital signal; a first output pad that outputs the first pulse signal; a second input pad; a first reception circuit that generates a second digital signal in correspondence to a second pulse signal inputted to the second input pad; a DAC that converts the second digital signal into a second analog signal; and a second output pad that outputs the second analog signal. The third chip, upon receiving the first pulse signal from the first output pad of the first chip, outputs the second pulse signal to the second input pad of the second chip.

Provided are a grain-oriented electrical steel sheet and stacked iron core having properties that can achieve both low iron loss and low noise in transformers by suppressing vibration caused by electromagnetic forces at the joint parts of the stacked iron core. The grain-oriented electrical steel sheet comprises, on at least one of both surfaces thereof, a plurality of strain regions that extend linearly in a direction transverse to a rolling direction of the steel sheet and are arranged at intervals in the rolling direction, wherein a standard deviation σBr of residual magnetic flux density Br determined from a hysteresis loop measured by exciting the steel sheet to 1.7 T with the rolling direction as a magnetization direction is 0.38 or less.

The invention discloses an oil-immersed transformer low-voltage side sleeve insulating protective cover device which comprises a protective assembly, a fixed part, a first sliding part and a second sliding part, and the fixed part, the first sliding part and the second sliding part are arranged outside the low-voltage side of a transformer in a sleeving mode. The fixing part, the first sliding part and the second sliding part are each provided with an outer convex face used for protection and an inner concave face facing the low-voltage side of the transformer, and the first sliding part and the second sliding part are arranged close to one side of the inner concave face of the fixing part and can slide along the inner concave face of the fixing part. The oil-immersed transformer protection device has the beneficial effects that protection operation on the low-voltage side of the oil-immersed transformer is achieved through cooperation of the fixed part, the first sliding part and the second sliding part, and by means of the characteristic that the first sliding part and the second sliding part can slide freely, workers can directly open the placement interval when the transformer is overhauled or maintained, and the operation is convenient. The operation of dismounting the insulating sleeve in the traditional maintenance work is avoided, and the maintenance efficiency is greatly improved.

The application discloses a traction transformer control cabinet and a rail train, and relates to the technical field of rail transit vehicles.The traction transformer control cabinet comprises a detachable shell and a control module arranged in the detachable shell; wherein the control module is used for determining the fan frequency of the fan in the cooling system of the traction transformer according to the first collection data sent by the whole vehicle controller of the rail train and the second collection data sent by the traction transformer, so as to utilize the fan frequency to perform frequency conversion control on the fan; the first collection signal comprises vehicle speed data, and the second collection signal comprises oil temperature data; through the arrangement of the traction transformer control cabinet, the control module in the traction transformer control cabinet performs frequency conversion control on the cooling fan according to the data such as the vehicle speed of the train and the oil temperature of the traction transformer, the low noise and the intelligentization of the traction transformer are realized, the noise of the rail train can be effectively reduced, and the passenger comfort is improved.

The invention relates to a low-loss FeSi-CIP composite soft magnetic powder core and a preparation method thereof. The adopted raw material powder is composed of amorphous nanocrystalline atomized FeSi series powder and filling powder composed of carbonyl iron powder and iron-silicon-aluminum powder. The carbonyl iron powder accounts for 15-25% of the mass of the raw material powder, the iron-silicon-aluminum powder accounts for 5-15% of the mass of the raw material powder, and the filling powder accounts for 25-35% of the mass of the raw material powder. Two-stage warm-pressing pressing is adopted, self-tempering is achieved to a certain extent at the specific warm-pressing temperature, and high direct-current bias performance and low iron loss can be obtained without heat treatment annealing after pressing forming. The effective magnetic conductivity of the powder core is 42 or above, the loss is as low as 350 mW / cm < 3 > (50 mT, 100 kHz), and the direct current bias performance under the external field of 100 Oe reaches 90% or above.

To identify the source of abnormal indicator components when characteristic abnormal indicator components other than benzenethiol and carbonyl sulfide are generated within an insulating medium.SOLUTION: Whether an abnormal indicator component generated in an insulating medium due to a discharge abnormality or overheating abnormality of a transformer is included in a pre-established list showing the relationship between materials applied to the transformer and abnormal indicator components generated in the insulating medium due to decomposition of those materials shall be investigated. If the abnormal indicator component is included in the list, the material containing the component shall be selected, and the abnormal site to which the material is applied shall be identified.SELECTED DRAWING: Figure 2

The invention relates to an automatic lamination system, and relates to the technical field of transformer preparation. The automatic lamination system comprises a positioning table and a stacking table, the positioning table is used for placing a plurality of groups of silicon steel sheet stacks, the silicon steel sheet stacks in each group are arranged in parallel, the automatic lamination system further comprises a stacking device, and the stacking device comprises a stacking frame, a moving mechanism and a plurality of adsorption frames. The moving mechanism is used for driving the stacking frame to move between the positioning table and the stacking table, the multiple adsorption frames are distributed in the moving direction of the stacking frame, and the multiple adsorption frames and the multiple sets of silicon steel sheet piles are arranged correspondingly; each adsorption frame is provided with a plurality of parallel adsorption mechanisms, the adsorption mechanisms are used for adsorbing top silicon steel sheets in the corresponding silicon steel sheet piles on the positioning table, each adsorption frame is provided with an adjusting mechanism, and the adjusting mechanisms are used for adjusting the distance between the adsorption mechanisms. The silicon steel sheet stacking device has the effect that the adjusting effect of the distance between the silicon steel sheets during stacking is guaranteed.

To suppress degradation of characteristics, a high frequency module includes a mounting substrate, a first signal terminal, a second signal terminal, and ground terminals, and a hybrid filter. The hybrid filter is coupled between the first signal terminal and the second signal terminal. The hybrid filter includes an acoustic wave filter having at least one acoustic wave resonator, a first inductor, and a capacitor. The pass band width of the hybrid filter is larger than that of the acoustic wave resonator. A resin layer is disposed on a first principal surface of the mounting substrate. The resin layer covers at least part of the acoustic wave filter. A metal electrode layer covers at least part of the resin layer, and is coupled to the ground terminals. The second inductor is coupled between the hybrid filter and the second signal terminal.

This grain-oriented electrical steel sheet includes a steel sheet having a surface in which a plurality of grooves extending in a direction intersecting a rolling direction and having a depth in a sheet thickness direction are formed. In a cross section parallel to the rolling direction and parallel to the sheet thickness direction, when a distance from an inlet portion of a groove to an opposite inlet portion of the groove is defined as a width of the groove, a region equivalent to the width of the groove from the inlet portion of the groove of the steel sheet in a direction opposite to a center of the groove in the rolling direction is defined as a groove edge portion, and a surface in a region separated from the inlet portion of the groove in the direction opposite to the center of the groove in the rolling direction is defined as a reference plane, the groove edge portion has a projection that is a region having a width of 1 µm or more and a projection height of 1 µm or more from the reference plane, and an area fraction of Goss oriented grains of the projection is 10% or more.

The invention discloses a preparation method of a low-magnetic-conductivity high-strength iron-silicon magnetic powder core, which comprises the following steps of: 1, phosphating iron-silicon alloy magnetic powder, and physically coating the phosphated magnetic powder by using magnesium aluminum silicate gel with a layered structure; 2, preheating the magnetic powder obtained in the step 1 in an inert atmosphere; 3, sufficiently and uniformly mixing magnesium aluminum silicate gel, a binder and the magnetic powder obtained in the step 2, heating a mixed system, and mechanically stirring until the powder is dried; 4, the magnetic powder obtained in the step 3 and a lubricant are mechanically stirred to be evenly mixed and then pressed into a magnetic powder core blank; and 5, the blank obtained in the step 4 is subjected to heat treatment under the inert protective atmosphere. The magnetic powder core prepared by the method has the characteristics of low magnetic conductivity and high strength.

Disclosed is a tunable inductor device having a substrate, a planar spiral conductor having a plurality of spaced-apart turns disposed over the substrate, and a phase change switch (PCS) having a patch of a phase change material (PCM) disposed over the substrate between and in contact with a pair of adjacent segments of the plurality of spaced-apart turns, wherein the patch of the PCM is electrically insulating in an amorphous state and electrically conductive in a crystalline state. The PCS further includes a thermal element disposed adjacent to the patch of PCM, wherein the thermal element is configured to maintain the patch of the PCM to within a first temperature range until the patch of the PCM converts to the amorphous state and maintain the patch of the PCM within a second temperature range until the first patch of PCM converts to the crystalline state.

An example device includes a first primary coil, a second primary coil, a combined power output, a first directional coupler output, a second directional coupler output. The example device also includes a secondary coil coupled to the combined power output, configured to magnetically couple to the first primary coil, and configured to magnetically couple to the second primary coil. The example device further includes a tertiary coil configured to magnetically couple to the secondary coil and including a first end coupled to the first directional coupler output, and a second end coupled to the second directional coupler output.

An apparatus for wireless communications includes a power amplifier, a low-noise amplifier, a power detector, and a transformer. The transformer includes a first inductor coupled to an output of the power amplifier, and a second inductor coupled to an antenna, wherein the second inductor is magnetically coupled with the first inductor. The transformer also includes a third inductor coupled to an input of the low-noise amplifier, wherein the third inductor is magnetically coupled with the second inductor. The transformer also includes a coupling inductor coupled to an input of the power detector, wherein the coupling inductor is magnetically coupled with at least one of the first inductor and the second inductor.

A nanocrystalline alloy soft magnetic powder contains: impurities; and a composition represented by a composition formula FeaCubNbc(Si1-x(B1-yCry)x)100-a-b-c-dSd represented by an atomic ratio, where a, b, c, d, x, and y satisfy 75.5≤a≤79.5, 0.3≤b≤2.0, 2.0≤c≤4.0, 0.001≤d≤0.080, 0.55≤x≤0.91, and 0≤y≤0.185. The nanocrystalline alloy soft magnetic powder has crystal grains having a crystallite diameter of 1.0 nm or more and 30.0 nm or less, a particle diameter D10 is 7.0 μm or more and 15.0 μm or less, and a particle diameter D50 is 22.0 μm or more and 32.0 μm or less.

The invention relates to the technical field of high-voltage dry-type reactive power compensation, and discloses an underground mining high-voltage dry-type reactive power compensation device. Comprising a dry-type iron core filter reactor module, a high-voltage self-healing parallel capacitor module, an intelligent measurement and control protection integrated module, a heat dissipation dustproof adaptive adjustment module, a high-voltage insulation wiring terminal group, a fault positioning and early warning module and a remote monitoring communication module. All the modules are integrated into a whole through modular design. According to the invention, a modular integrated design is adopted, each functional module is uniformly arranged in the mining explosion-proof shell to form a uniform grounding loop, the shell meets the explosion-proof standard, the protection grade reaches IP65, and the high-grade insulation design of each module is matched, so that the underground high-dust, high-humidity and explosive environment is effectively adapted; the problems that a traditional device is large in potential safety hazard and poor in adaptability are thoroughly solved, and the safety and reliability of the device are remarkably improved.

The inductor (1) includes wiring (2) and a magnetic layer (3) covering the wiring (2). The wiring (2) includes conductors (6) and an insulating layer (7) covering the conductors (6). The magnetic layer (3) contains magnetic particles and an adhesive (9). In the peripheral region (4) of the wiring (2), the filling rate of the magnetic particles is 40% by volume or more. The peripheral region (4) is the area in the magnetic layer (3) that, when viewed in section, extends outward from the outer peripheral surface of the wiring (2) by a value equivalent to 1.5 times the average of the longest and shortest lengths from the centroid (C) of the wiring (2) to the outer surface of the wiring (2).

The invention discloses a FeNi soft magnetic composite material based on tetrabutyl orthosilicate hydrolysis coating and a preparation method of the FeNi soft magnetic composite material. According to the method, through a controllable sol-gel process, tetrabutyl orthosilicate is hydrolyzed to generate SiO2 gel, then a uniform and ultrathin SiO2 gel layer is generated on the surface of FeNi powder in situ, and then heat treatment densification is performed to obtain the FeNi soft magnetic composite material coated with SiO2 in an insulation mode. The SiO2 insulating layer is firmly combined with the matrix metal powder, the thermal stability is good, high frequency and high resistivity are achieved, and meanwhile dilution of non-magnetic relative magnetic performance is reduced to a great extent. The final magnetic core is obtained through compression molding and annealing heat treatment, has the excellent characteristics of high effective magnetic conductivity and low high-frequency magnetic core loss, and is particularly suitable for various efficient and miniaturized power electronic devices in the MHz frequency band.

A wiring device including a first printed circuit board (PCB) that includes a first direct current (DC) output port and a second DC output port. The wiring device further includes a second PCB electrically connected with the first PCB, the second PCB including a planar transformer integrated with a surface of the second PCB and configured to output power at one or more DC voltage levels, a switch connected to the planar transformer, and a microcontroller. The microcontroller includes an electronic processor and is configured to control delivery of power from the planar transformer to at least one of the first DC output port and the second DC output port using the switch. The switch may have a Gallium Nitride (GaN) chemistry or a Silicon Carbide (SiC) chemistry.

This electromagnetic steel sheet with an adhesive film is provided with: an electromagnetic steel sheet; and an adhesive film provided on at least a portion of one or both surfaces of the electromagnetic steel sheet, the adhesive film containing a crosslinkable thermoplastic resin (A) and a thermoplastic resin (B) other than the crosslinkable thermoplastic resin (A), the adhesive film having a hardness of 200-260 MPa, and the adhesive film having a hardness of 200-260 MPa. The adhesive film has a hardness of 200 to 300 MPa after the adhesive film is heated at 200 DEG C for 5 minutes.

This inductor (1) has the form of a sheet. The inductor (1) comprises a first wiring (2) and second wiring (3), and a magnetic layer (4) in which the first wiring (2) and second wiring (3) are embedded. The magnetic layer (4) has a first main surface (5) and a second main surface (6). The first main surface (5) has a first recess (9). The second main surface (6) has a second recess (12). The ratio of depth L1 of the first recess (9) with respect to depth L2 of the second recess (12) (L1 / L2) is 0.67 to 1.50.

The present disclosure provides a magnetic material that can achieve an improvement in the gap-filling properties of a product made from the magnetic material, an improvement in the magnetic permeability of the product, and an improvement in the withstand voltage of the product. The magnetic material comprises a first magnetic powder and a second magnetic powder. The 50% particle size based on the volume-based particle size distribution of the first magnetic powder is greater than the 50% particle size based on the volume-based particle size distribution of the second magnetic powder. The 50% particle size based on the volume-based particle size distribution of the first magnetic powder is 5.5-16.5 μm. The 90% particle size based on the volume-based particle size distribution of the first magnetic powder is not more than 31 μm.

The invention relates to an iron core for a transformer and the transformer. The present invention suppresses an increase in process coefficient due to magnetic flux transfer in the lamination direction of an iron core by controlling the variation in the thickness of an insulating film of an oriented electromagnetic steel sheet with an insulating film used in the iron core. The iron core for the transformer is formed by stacking a plurality of single layers formed by one or a plurality of oriented electromagnetic steel plates with insulation films, and each single layer is provided with at least one steel plate discontinuous part extending along the direction intersecting with the flow direction of magnetic flux in the single layer. The standard deviation (sigma) of the thickness of the insulating film in a region sandwiched between the steel plate discontinuous section of one single layer and the steel plate discontinuous section of the other single layer, which are adjacent in the lamination direction, is 2-5 [mu] m (inclusive).

A laminated core 10 includes electrical steel sheets 1 and adhesive insulating coatings 2 alternately stacked and has a lamination direction D tensile strength of adhesive bond of 20 MPa or more measured under a 25°C condition after a complete reaction of each adhesive insulating coating 2. A method for manufacturing a laminated core 10 includes a punching step of punching an electrical steel sheet coated with an adhesive insulating coating 2 to form an electrical steel sheet 1, an accommodating step of stacking and accommodating electrical steel sheets 1 in a die after the punching step, a low-pressure bonding step of heating the electrical steel sheets 1 in the die at a surface temperature of 60°C or more and 200°C or less and bonding the adjacent electrical steel sheets 1 by pressurization at 3.0 MPa or less to form a laminated core 10, and a take-out step of taking out the laminated core 10 from the die after the low-pressure bonding step.

The invention relates to a soft magnetic powder, a magnetic core, and a magnetic component. The soft magnetic powder contains Fe and C. And the content of C is from 0.01% by mass to 0.5% by mass (inclusive). The soft magnetic powder contains special soft magnetic particles. The special soft magnetic particles contain both a phase having a symmetry of a space group Im-3m or Pm-3m and a phase having a symmetry of a space group Pnam.

The grain-oriented electrical steel sheet is provided with a plurality of magnetic domain control processing lines on the surface, and a rectangular evaluation region in which the length of the side parallel to the rolling direction of the grain-oriented electrical steel sheet is 50 mm and the length of the side parallel to the direction perpendicular to the rolling direction of the grain-oriented electrical steel sheet is 100 mm is set in the grain-oriented electrical steel sheet. When imaginary lines parallel to the direction perpendicular to the rolling direction and having a length of 100 mm are set at a 5 mm interval in a direction parallel to the rolling direction inside the evaluation region, in at least one of the imaginary lines, at least one of the imaginary lines has a length of 100 mm. The average value [beta] L of the absolute values of [beta] angles measured between two magnetic domain control points, which are the intersections of the virtual line and the magnetic domain control line, is 1.5 DEG or more, wherein the standard deviation of the interval between the magnetic domain control points is 1.25 mm or more, and the interval is the maximum value DL.