613results about "Transformers/inductances details" patented technology

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 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.

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).

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.

The wound core is a wound core having a wound core body in which a plurality of polygonal annular directionality electromagnetic steel sheets are stacked in a side view, the directionality electromagnetic steel sheets having planar portions and curved portions alternately and continuously in a length direction, and a crystal grain size Dpx of the directionality electromagnetic steel sheets being 2W or less in at least one curved portion.

[Problem]: To provide: a laminated iron core manufacturing method in which, in a step for outer diameter punching in a progressive die device, an anaerobic photocurable adhesive having both photocuring characteristics and anaerobic-curing characteristics is applied to an iron core thin plate that is to be punched out, and reliable and stable adhesion is performed during a simple step; and a laminated iron core structure. [Solution]: A manufacturing method for manufacturing a laminated iron core by using a progressive die device, wherein, in a step for outer diameter punching with a punch and die in the progressive die device, a notch is made in a side surface of an iron core thin plate, an anaerobic photocurable adhesive is applied to an upper surface and to the notch of the iron core thin plate, a pressing force is applied to a laminate of stacked iron core thin plates to fix the lamination surface of the laminate by virtue of anaerobic curing characteristics, and a side surface of the laminate is irradiated with light to fix the side surface of the laminate by virtue of photocuring characteristics.

This invention provides a soft magnetic powder that suppresses the amount of binder added during molding and enables the production of high-density and high-strength molded bodies; a pressed magnetic core and magnetic element containing such a soft magnetic powder; and an electronic device equipped with the aforementioned magnetic element. The soft magnetic powder is composed of Fe, 2.5% by mass or more and 7.5% by mass or less Si, 1.0% by mass or more and 10.0% by mass or less Cr, and 1.0% by mass or less impurities. Its average roundness is 0.80 or more and less than 0.95. In a cumulative particle size distribution curve, when the particle size at 10% cumulative value from the small diameter side is defined as D10, the particle size at 50% cumulative value is defined as D50, and the particle size at 90% cumulative value is defined as D90, the particle size D50 is 3.0 μm or more and 11.0 μm or less, and the particle size difference D90-D10 is 4.0 μm or more and 22.0 μm or less. The particle size D50 is defined as A [μm], and the specific surface area is defined as B [m²]. 2 When / g], A×B is greater than 1.20 and less than 2.40.

A soft magnetic powder coated with a silicon coating, wherein the silicon coating is of formula (I) and Si x B y O 2x+1.5y (I) (wherein x = 0.5 to 1.5, y = 1.0 to 1.5) A soft magnetic powder coated with a silicon coating is obtained after heat treatment at a temperature in the range of 350 to 700°C, with an average particle size D of 0.5 to 250 μm. 50 A soft magnetic powder coated with a silicon coating, having the following properties.

An element body 4 includes a metal particle dispersion element 15 in which metal particles 12 are dispersed. A surface of the metal particle dispersion element 15 includes an indicator area 10. The indicator area 10 includes a recess 10a having a predetermined depth measured from a reference plane L of the metal particle dispersion element 15. The predetermined depth D1 is deeper than D50 of the metal particles 12 included in the metal particle dispersion element 15.

This invention provides a new energy core based on wide-width amorphous alloy strip and its preparation method, comprising the following steps: winding the amorphous alloy strip based on a tension-wound diameter linear decreasing function to form a single-frame core; splicing multiple single-frame cores along the magnetic circuit direction to form a core body; and annealing the obtained core body under a protective atmosphere to obtain a new energy core. This invention solves the key technical problems of winding, splicing, and annealing of wide-width amorphous alloy strip in the preparation of high-power new energy cores, and realizes the preparation of large-size amorphous alloy cores with low loss, high saturation magnetic induction intensity, and high structural stability.

To provide a leakage magnetic flux power generating device and a power device which are easy to install in a power device, do not require the trouble of wiring, securing space, or battery replacement, have excellent power generation efficiency, and are compatible with various types of boards equipped with power supply ICs with different operating voltages, and are highly versatile. [Solution] A leakage magnetic flux power generating device (10) is attached to a power device having a moving body that performs rotational or linear motion using electromagnetic force, and includes one or more windings (11B) that generate electromotive force through electromagnetic induction due to changes in leakage magnetic flux leaking from the power device, which is a rotary motor or linear motor, in accordance with the rotational motion of the rotor, which is the moving body, or the linear motion of a slide slider.

The present disclosure relates to a dual-active-bridge converter and a power supply apparatus. The dual-active-bridge converter comprises multiple phases of transformers that are arranged and assembled in sequence, wherein a primary winding and a secondary winding in each phase of transformer are respectively wound on two winding post magnetic cores, the two winding post magnetic cores are positioned opposite each other, the two winding post magnetic cores are connected by means of two non-winding-post magnetic cores, and every two adjacent phases of transformers share a single non-winding-post magnetic core.

An electrical switch (1) for a load tap changer (2), the electrical switch (1) comprising: at least three electrical contacts (3a, 3b, 3c) connected to respective electrical conductors (4a, 4b, 4c); a switching device (5) configured to be movable between a plurality of positions (P1, P2), wherein the switching device (5) in each respective position (P1, P2) physically contacts a respective combination (C1, C2) of the electrical contacts (3a, 3b, 3c) to provide electrical contact between the electrical contacts in each respective combination (C1, C2) of electrical contacts (3a, 3b, 3c); a gas-tight sealed housing (6) providing an inner space (7) enclosing the electrical contacts (3a, 3b, 3c) and the switching device (5), the electrical conductors (4a, 4b, 4c) extending from the electrical contacts (3a, 3b, 3c) inside the inner space (7) of the housing (6) to outside the housing (6); and a control device (10) configured to control movement of the switching device (5). The inner space (7) is under vacuum or filled with arc suppressing gas. The control device (10) comprises an operating member (8) extending from outside the housing (6) into the inner space (7) of the housing (6), the operating member being operatively connected to the switching device (5) such that the operating member (8) is able to move the switching device (5) to the plurality of positions (P1, P2) depending on the position of the operating member (8). Further, the operating member (8) comprises an arm (9) rotatably attached to the housing (6) for rotation about an axis of rotation (11), wherein the switching device (5) is attached to an end portion of the arm such that the switching device (5) is movable along an arcuate path between the plurality of positions.

Provided are: a nanocrystal alloy soft magnetic powder which optimizes the particle shape and particle size distribution and exhibits good filling properties and magnetic properties; a dust core which contains the powder and has high magnetic permeability and low iron loss; a magnetic element; and an electronic device. The nanocrystal alloy soft magnetic powder is represented by the composition formula FeaCubNbc (Si1-x (B1-yCry) x) 100-a-b-c-dSd [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, expressed in atomic ratio. [1, 2, 3], and an impurity composition, and contains crystal grains of 1.0 nm to 30.0 nm, a particle size D10 of 7.0 [mu] m to 15.0 [mu] m, and a particle size D50 of 22.0 [mu] m to 32.0 [mu] m.

Provided are a composite metal magnetic body having favorable insulation properties and a favorable L-value, an inductor, and a method of manufacturing an inductor. A composite metal magnetic body CP according to the present disclosure comprises metallic magnetic particles DP containing Fe and Si, and an oxide film OL coating the metallic magnetic particles DP, a plurality of metallic magnetic particles DP being bonded by the oxide film OL, wherein the metallic magnetic particles DP contain 511 to 1493 ppm of phosphorus, 23 to 4747 ppm of chromium, and 7 to 95 ppm of sodium with respect to the Fe and Si content in the metallic magnetic particles DP.

To provide an electronic component capable of achieving both adhesion and visibility of a mark to an element body. An electronic component includes an element body and a mark formed on the element body. A main material of the mark is different from a material of the element body. The mark includes a first portion that constitutes a part of the mark and a second portion located at a position different from the first portion and connected to the first portion. A ratio of a main material of the mark included in the first portion is lower than a ratio of a main material of the mark included in the second portion.

This invention provides a NiZn-based ferrite that offers excellent productivity and can suppress the increase in the rate of change of complex relative permeability with respect to temperature, as well as a noise filter using the same. [Solution] A NiZn-based ferrite containing Fe in the form of "48.06 mol% or more and 48.43 mol% or less" in Fe2O3 equivalent, Zn in the form of "29.47 mol% or more and 29.96 mol% or less" in ZnO equivalent, Cu in the form of "5.70 mol% or more and 6.30 mol% or less" in CuO equivalent, and Ni in the form of "15.70 mol% or more and 16.34 mol% or less" in NiO equivalent, wherein when the total amount of Fe2O3, ZnO, NiO and CuO is taken as 100 mol%, the total amount of Fe2O3 and ZnO is "77.51 mol% or more and 78.39 mol% or less".

A distribution transformer for use in a providing electrical power to sites, includes a ferromagnetic core; a primary winding configured to be connected to a source grid at source grid voltage; and a secondary winding configured to be coupled to service cables to supply electrical energy to at least one of the sites at a first line voltage and at least another of the sites at a second line voltage, wherein the second line voltage is higher than the first line voltage.

The utility model belongs to the technical field of electrical equipment, and discloses an air bus box and a transformer. The air bus box comprises a box body, the box body comprises a main box body, the rear portion of the main box body is connected with an oil tank of a transformer, a side-out sleeve of the transformer penetrates through the rear portion of the main box body and is connected with a copper bar located in a containing space, a cable penetrates through the bottom of the main box body, bent side plates are oppositely arranged on the two sides of the main box body, and the bent side plates are in a diagonal bending shape. The rear portion of the main box body is connected with the oil tank, and the cable penetrates through the bottom of the main box body, so that the transformer side outlet sleeve can be inserted into the main box body from the rear portion, the copper bar can be connected into the box body, and the cable can penetrate through the bottom of the main box body and the box body to protect the cable and the copper bar. By arranging the bent side plates which are bent diagonally on the two sides, the rigidity and strength of the bent side plates and the box body are increased, bending stress can be better dispersed and resisted, deformation and even damage of the box body are reduced, and the situation that the electrical insulation distance of the copper bars is insufficient due to deformation of the box wall is avoided.

A laminate non-planar radio-frequency (RF) choke device includes a first RF choke. The first RF choke has a first winding structure including a plurality of first conductive traces and a plurality of first vias. The first conductive traces are formed on a first layer and a second layer of a laminate. The first vias are formed between the first layer and the second layer of the laminate. The first vias are stitched in a winding direction through the first conductive traces.