1053results about "Cores/yokes" patented technology

A coil apparatus includes a coil unit including a coil, a base core that is a first core component, and a core module that is a second core component. The first core component includes a center leg that is a leg around which the coil is wound. The second core component includes a plurality of core segments arranged in a row with gaps between them. The second core component is connected to the leg to form a magnetic path together with the first core component.

The invention provides a hot-pressing preparation method and application of a magnetic powder core. The hot-pressing preparation method comprises the following steps: carrying out insulation coating on glassy state soft magnetic amorphous alloy powder to obtain an intermediate powder material with a coating structure; the coating structure comprises a first coating layer or comprises a first coating layer and a second coating layer which are arranged in sequence; the first coating layer comprises nano inorganic particles and phosphate, and the second coating layer comprises an organic coating material; carrying out hot pressing treatment on the material containing the intermediate powder material to obtain a magnetic powder core; the adopted glassy soft magnetic amorphous alloy powder has a supercooled liquid phase region, the lowest temperature and the highest temperature of the supercooled liquid phase region are Tg and Tx respectively, the temperature of the hot pressing treatment is (Tg-20 DEG C)-(Tx-20 DEG C), the pressure of the hot pressing treatment is 100-500 MPa, and the holding time is 2 s-120 min. According to the magnetic powder core provided by the invention, the coating layer can be kept complete in the hot pressing process, and the magnetic powder core has relatively high density, high resistivity, high magnetic conductivity and low loss.

A multilayer inductor is provided. The multilayer inductor includes a multilayer winding portion comprising a plurality of coil layers that are vertically stacked, and having an inner surface that defines a hollow of the plurality of coil layers and having an outer surface that defines an outer side and a magnetic compensator made of a soft magnetic material and comprising a magnetic wall located at at least one of the inner surface or the outer surface of the multilayer winding portion.

An inductor includes a first wire adjacent to a second wire and separated by an interval; a first magnetic layer having first and second surfaces separated from each other by an interval, and an inner peripheral surface in contact with an outer peripheral surface of the first and second wires between the first and second surfaces; a second magnetic layer disposed on the first surface; and a third magnetic layer disposed on the second surface. The second magnetic layer has a third surface facing and separated from the first surface by an interval in the thickness direction. The relative permeability of each of the second and third magnetic layers is higher than that of the first magnetic layer. The inductor includes a suppression portion located between the first and second wires which suppresses the magnetic coupling between the first and second wires.

The invention discloses a contactor magnetic core, a contactor electromagnetic assembly and a contactor. The contactor magnetic core comprises a static magnetic core which is suitable for being fixed on a magnetic conductive plate of the contactor and is provided with a main body part which is suitable for being inserted into a coil framework of the contactor; and the movable magnetic core is suitable for being movably inserted into the coil framework and is provided with a flange part positioned at the upper end of the movable magnetic core. When the static magnetic core and the movable magnetic core are inserted into the coil framework, the main body part of the static magnetic core faces the flange part of the movable magnetic core, and the diameter of the main body part of the static magnetic core is slightly larger than that of the flange part of the movable magnetic core, so that the electromagnetic attraction force between the static magnetic core and the movable magnetic core is increased. According to the invention, the number of turns and the copper consumption of the coil can be reduced while enough electromagnetic attraction is ensured, so that the cost and the size of the contactor can be reduced.

The invention relates to the technical field of magnetic therapy, and discloses an electromagnetic physical therapy device which comprises a framework, a coil, a magnetic needle, a cooling fin and a supporting sleeve, the framework is provided with an up-down through assembly hole, the coil is wound on the periphery of the framework, the supporting sleeve is provided with an up-down through magnetic needle cavity, and the bottom of the supporting sleeve is provided with a protruding block extending outwards. The magnetic needle is fixed in the magnetic needle cavity, the supporting sleeve extends into the assembling hole of the framework, the protruding block extends out of the assembling hole and is attached to the bottom face of the framework, the cooling fin is provided with a vertically-through cooling hole, a groove is formed in the periphery of the top of the cooling hole, the top of the cooling hole is fixedly connected with the bottom of the framework, and the cooling hole corresponds to the assembling hole in position. The groove accommodates the protruding block so that the protruding block can be clamped by the framework and the cooling fin, and therefore the magnetic needle can be fixed in the assembling hole, the assembling hole does not need to be filled with pouring sealant, and the magnetic needle and the framework can be detached from each other.

To provide a reactor which can easily adjust an inductance and a heat dissipation without increasing the size.SOLUTION: In a reactor, a coil of which the number of winding parts is one, and a magnetic core are provided, an outer peripheral surface of each winding part contains a part contacted to an installation object of the reactor, and the magnetic core includes an E-shape like first core part, a T-shaped like second core part, and a gap part. The first core part is constructed by a compact of a composite material, and the second core part is constructed by a dust compact. The gap part is arranged between a first middle core part of the first core part and a second middle core part of the second core part in an inner part of each winding part. A length from the second end surface of each winding part to the gap part is 0.2 times or more and 0.49 times or less of the length of each winding part. A total volume of a volume of the first core part, a volume of the second core part, and a volume of the gap part is 50 cm3 or more and 500 cm3 or less.SELECTED DRAWING: Figure 4

A structure includes a first layer having inductor windings. An inner area of the first layer is at least partially enclosed by the inductor windings and an outer area of the first layer is separated from the inner area by the inductor windings. This structure further includes a second layer having structural fill elements. The first layer and the second layer are parallel, and the second layer is relatively below the first layer in a direction perpendicular to the first layer. The density of the structural fill elements aligned below the inner area is less than the density of the structural fill elements aligned below the outer area.

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 present invention provides a reactor equipped with a magnetic core that can suppress the increase in iron loss and leakage flux. [Solution] A reactor 1 comprising a coil 2 having winding sections 21, 22 and a magnetic core 3, wherein the magnetic core 3 has a plurality of segmented pieces 3A, 3B, ... including a first core piece 5 and a second core piece 6, and the first core piece 5 is made of a composite material including resin and soft magnetic powder dispersed in the resin, and comprises a first portion 51 that extends in a direction perpendicular to the axial direction of the winding sections 21, 22 and is positioned facing the end faces of the winding sections 21, 22, and a second portion 52 that extends axially from the first portion 51, wherein the first portion 51 and the second portion 52 are formed in a continuous manner without joints, and the first relative permeability of the first portion 51 with respect to the magnetic flux along the extension direction of the first portion 51 is different from the second relative permeability of the second portion 52 with respect to the magnetic flux along the extension direction of the second portion 52.

This invention proposes a metal soft magnetic powder core with excellent low-frequency magnetic properties and its preparation method, belonging to the field of magnetic materials. Using at least nano-boron powder and iron-silicon soft magnetic alloy powder as raw materials, high-temperature diffusion and high-temperature nitriding treatments are employed. Part of the nano-boron powder forms a high-resistivity iron-silicon-boron permeation layer on the surface of the iron-silicon soft magnetic alloy powder, while some nano-boron powder forms a boron nitride insulating layer with both high resistivity and high thermal stability between the iron-silicon soft magnetic alloy powders, effectively controlling eddy currents. Hot pressing further increases the density of the metal soft magnetic powder core, reduces the demagnetizing field, thereby improving permeability and reducing hysteresis loss. Thus, excellent low-frequency magnetic properties of high density, high permeability, and low loss are simultaneously obtained in the metal soft magnetic powder core.

Disclosed are a soft magnetic iron-based powder, a preparation method therefor, and a soft magnetic component, which are applicable to various industrial fields such as a core of a motor. According to an embodiment of the disclosed soft magnetic iron-based powder, the powder comprises, in wt %, more than 2% of Si, more than 0.02% of Al, more than 0.05% of Mn, more than 0% and less than 0.1% of O, and the balance being Fe and unavoidable impurities, and satisfies [Si] / [Al]>2, wherein the difference in [Si]+[Al]+[Mn] between D10 and D90 may be less than 10 wt %. [Si], [Al], and [Mn] represent wt % of respective elements.

The invention relates to a magnetic assembly, which comprises a magnetic core assembly and a magnetic core, the first magnetic column and the third magnetic column are oppositely arranged and located between the second magnetic column and the fourth magnetic column, and the second magnetic column and the fourth magnetic column are oppositely arranged; the first winding channel comprises a first part formed between the first magnetic column and the second magnetic column and a second part formed between the second magnetic column and the third magnetic column; the second winding channel comprises a first part formed between the first magnetic column and the fourth magnetic column and a second part formed between the third magnetic column and the fourth magnetic column; a part of the first winding is arranged in the first part of the first winding channel, and a part of the first winding is arranged in the second part of the second winding channel; and the second winding is partially arranged in the first part of the second winding channel and partially arranged in the second part of the first winding channel. The invention also relates to a power conversion module.

To provide a coil device capable of accurately adjusting a coupling coefficient between a first conductor and a second conductor.SOLUTION: A first conductor portion including a core portion including a magnetic powder and a resin, a first coil portion in the core portion, a first mounting portion facing a mounting target, and a first connecting portion connecting the first coil portion and the first mounting portion, and a second conductor portion including a second coil portion in the core portion, a second mounting portion facing a mounting target, and a second connecting portion connecting the second coil portion and the second mounting portion, the second coil portion extends along the winding direction of the first coil portion inside the first coil portion, a coupling adjuster including at least one of a non-magnetic material portion containing a resin and a magnetic material portion containing a magnetic material is disposed in the second coil portion, and an inter-conductor gap in which a distance between the first conductor portion and the second conductor portion increases as the first connecting portion and the second connecting portion move away from the winding direction is formed between the first conductor portion and the second conductor portion.SELECTED DRAWING: Figure 1

A soft magnetic alloy particle including Fe and Si. One to twenty nitride phases are observed in a cross-section of the soft magnetic alloy particle, an area per each of the nitride phases is within a range of 0.0005 to 10 μm2, and an area ratio of the observed nitride phases occupying the cross-section of the soft magnetic alloy particle is within a range of 0.1 to 2%.

An apparatus comprises: a first layer (451); a second layer (452) over the first layer (451), wherein the second layer (452) comprises a magnetic material; a third layer (453) over the second layer (452); a first winding with a first shape in the first layer (451), wherein the first winding is electrically conductive; and a second winding with a second shape in the third layer (453), wherein the second winding is electrically conductive, and wherein the second shape is an inverse of the first shape.

A magnetic element includes a magnetic core, at least one excitation winding and an auxiliary winding. The magnetic core includes at least one first magnetic leg, a second magnetic leg and a third magnetic leg. Each of the at least one magnetic leg is wound with an excitation winding, wherein a vector sum of magnetic flux passing through each of the at least one first magnetic leg is a first magnetic flux, a second magnetic flux is passing through the second magnetic leg, and a third magnetic flux is passing through the third magnetic leg. The auxiliary winding is partially or completely wound on the second magnetic leg, wherein the auxiliary winding is used to clamp the second magnetic flux.

A method to form a plurality of inductors in a single process by stacking multiple magnetic sheets, wherein each sheet is made to form a particular part in quantities, which can be a base part, a pillar part, a hollow part, or a cover part, for forming a magnetic body of an inductor.

A multiphase wireless power transfer pad has at least a first coil and a second coil and permeable material which includes a region of reduced magnetic permeability configured to minimise coupling between the first and second coils.

Disclosed are a transformer, a power conversion device, and a medical device. The transformer includes a primary winding, a plurality of magnetic core assemblies, and a plurality of secondary windings. The primary winding is configured to pass through the plurality of magnetic core assemblies. The plurality of secondary windings are wound on the plurality of magnetic core assemblies, respectively. Each of the plurality of magnetic core assemblies has an air gap of the same size. And / or, the transformer includes a capacitor and an impedance element. The capacitor is connected in series with the impedance element. The series-connected capacitor and impedance element are connected to two ends of a corresponding secondary winding.

The invention relates to an intravascular blood pump, a method for manufacturing a magnetic core and a method for manufacturing a blood pump. The blood pump includes: a pump housing having a blood flow inlet and a blood flow outlet; an impeller is disposed in the pump housing to be rotatable about an axis of rotation. The impeller has blades sized and shaped to deliver blood from the blood flow inlet to the blood flow outlet. The blood pump comprises a drive unit for rotating an impeller, the drive unit comprising a magnetic core comprising a plurality of posts arranged about an axis of rotation and a back plate connecting the posts and extending between the posts in an intermediate region. And a coil winding disposed around each of the posts. The material of at least a portion of at least one of the posts is integral with the material of the intermediate region of the back plate. Within each of the columns, one of the sheets of soft magnetic material, or an intermediate layer between two of the sheets of soft magnetic material, is arranged in a plane including the axis of rotation.

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.

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.

A method of fabricating an inductor device includes preparing a conductive coil, connecting two terminals to one of two ends of the conductive coil, molding a pillar from a plurality of first composite material powders by a pressing process where each first composite material powder is composed of a first magnetic material powder coated with a first thermosetting resin, placing the pillar in a surrounding space formed by the conductive coil, molding a cladding body from a plurality of second composite powders where the second composite material powders is composed of a second magnetic material powder coated with a second thermosetting resin, heating the cladding body, the conductive coil and the pillar cladded by the cladding body such that the plurality of first magnetic material powders are bonded by the cured first thermosetting resin and the plurality of second magnetic material powders are bonded by the cured second thermosetting resin.

A coil component having a first flange portion connected to a first end of a winding core portion on a first positive direction side, a second flange portion connected to a second end of the winding core portion on a first negative direction side, and a top plate extending through a longer range in a direction along a center axis than the winding core portion and connected to the first and second flange portions via an adhesive which does not contact the winding core portion. A first presence area is where the adhesive is on a surface of the top plate. A second presence area consists of a second area where the adhesive is on a surface of the first flange portion and a fourth area where the adhesive is on a surface of the second flange portion. The first presence area is larger than the second presence area.

A coil structure for near-field wireless power transfer, integrating the traditional inductor and external capacitor structure into one single coil and forming a series resonance. The series resonance is achieved by a terminal connection and layering method. The electric field is canceled via a distributed turn-to-turn interleaving structure. With the integrated capacitor, the costs and space of a resonant capacitor can be saved. With the canceled electric field, the interference with neighboring components, such as touch-screen, can be reduced. Other benefits can include low-profile and fabrication convenience based on RGB technology. This coil can be useful for both consumer electronics and electric vehicle wireless charging.

A filter inductor, which includes: an outer magnetic core with a window, an inner magnetic core, and a winding. The inner magnetic core includes a first inner magnetic core and a second inner magnetic core which are located at least partially in the window. The winding includes a first winding, a second winding, a third winding and a fourth winding which are wound around the outer magnetic core at intervals. The first inner magnetic core and the second inner magnetic core are stacked. For the first inner magnetic core, a first end is located between the first winding and the second winding, and a second end is located between the third winding and the fourth winding. For the second inner magnetic core, a first end is located between the second winding and the third winding, and a second end is located between the fourth winding and the first winding.

An integrated magnetic component (1, 1a, 1b, 1c, 1d, 1e, 1f) is disclosed and includes a plurality of PCBs (4, 4a, 4b), a transformer (T) and a plurality of inductors (3, 3a, 3b, 3c, 3d, 3e, 3f). The transformer (T) includes a plurality of primary windings (21), a plurality of secondary windings (22), and two pieces of transformer cores (23). The primary windings (21) and the secondary windings (22) are disposed on the PCBs (4, 4a, 4b) and wound around the two pieces of transformer cores (23). The inductors (3, 3a, 3b, 3c, 3d, 3e, 3f) are disposed on the PCBs (4, 4a, 4b) and connected to the transformer (T). The primary windings (21) and the secondary windings (22) of the transformer (T) are disposed correspondingly in pairs on one of the PCBs (4, 4a, 4b), and the inductors (3, 3a, 3b, 3c, 3d, 3e, 3f) are disposed adjacent to the transformer (T).