Abstract: An electronic device has a primary coil 10; a secondary coil 20 disposed to face the primary coil 10; a primary-side electronic element 110 electrically connected to the primary coil 10; and a secondary-side electronic element 210 electrically connected to the secondary coil 20. The primary coil 10 has a primary-side first coil 10a that is provided on another side of the secondary coil 20, and a primary-side second coil 10b that is provided on one side of the primary-side first coil 10a. A connecting part 19 connecting the primary-side first coil 10a and the primary-side second coil 10b is provided and passes through a space of the secondary coil 20.

Abstract: A coil arrangement with reduced losses and a stabilized coupling factor. For this purpose, the arrangement has a coil core and a first winding, the turns of which are distributed over several sections which are spaced apart from one another.

Abstract: A multi-coil inductor includes a plurality of stacked inductor units. Each of the inductor units comprises: a magnetic core in which a magnetic path is formed; and a plurality of coils which are wound around the magnetic core to form at least one winding pair. Wherein a part of the magnetic path between the adjacent inductor units is shared. In the present invention, the leakage inductance is controlled and the may be magnetic saturation of magnetic core avoided by adjusting series and parallel connections among the coils.

Abstract: A method to form a plurality of inductors in a single process by placing multiple coils on a first magnetic sheet, and then stacking magnetic layers on the first magnetic sheet to encapsulate the coils so as to from a large magnetic body, and then cutting the large magnetic body into multiple inductors, wherein a terminal part of the coil disposed on the bottom surface of the magnetic body of the inductor is extended away from the axis of the coil and is entirely located at a same side of the axis of the coil.

Abstract: Inductor structure is provided, including: n inductors, each inductor including a base plate, a cover plate, a first magnetic column and a coil wound around the first magnetic column, n?2; m second magnetic column(s), each second magnetic column is disposed between at least two inductors, and has a first terminal connected to the cover plates of the at least two inductors, and a second terminal connected to the base plates of the at least two inductors, m<n, wherein the inductor and the second magnetic column connected with and disposed on one side of the inductor constitute an inductor unit, and the n inductors and the m second magnetic column(s) constitute multiple inductor units, wherein each inductor unit includes at least one air gap. Multiple inductors arranged close to each other are integrated in a small space, and not affected by mutual magnetic influence, which helps to realize miniaturization.

Abstract: When joining end faces of a plurality of soft magnetic sheets which are superposed in the sheet thickness direction and which are bent at parts forming corner areas of a core, offset of positions of the end faces from the desired positions is suppressed. In a region of a window part comprised of a region inside of a first part 110 and second part 120, a third part 130 with a length in a longitudinal direction (X-axial direction) the same as a length in the X-axial direction of the window part at the position where the third part 130 is arranged is arranged so as to contact the region of the inner circumferential surface between the first corner area 101 and third corner area 103.

Abstract: This power supply device is provided with: a first heat-generating component; a case; a resin material; a circuit board; a second heat-generating component; and a heat dissipation casing. This power supply device is additionally provided with a heat transfer member which has a first portion that is arranged to be in contact with a first outer surface of the case and a second portion that is arranged to be in contact with a second outer surface of the case, and which has a higher thermal conductivity than the case. The second heat-generating component is arranged in contact with the heat transfer member; and the heat transfer member dissipates the heat of the first heat-generating component and the second heat-generating component by being arranged in contact with a wall surface that constitutes the heat dissipation casing.

Abstract: A device includes a circuit assembly and a first conductive winding support having a first end attached to the circuit assembly and having a first winding support surface a first distance from the circuit assembly. The device also includes a second conductive winding support having a second end attached to the circuit assembly and having a second winding support surface a second distance from the circuit assembly, the second distance being different than the first distance. A conductive winding has first and second winding ends. The first winding end is attached to the first winding support surface, and the second winding end is attached to the second winding support surface.

Abstract: Provided is a power conversion device, including: a casing having a recessed portion; a magnetic component accommodated in the recessed portion of the casing; a heat radiation plate, which covers an opening of the recessed portion of the casing, and is thermally coupled to the magnetic component; and a fixing band wound around the magnetic component and the heat radiation plate to fix the magnetic component to the heat radiation plate, wherein at least a part of the fixing band is accommodated in a band accommodating groove formed in the recessed portion of the casing. With this configuration, assembly dimensional tolerance caused between the magnetic component and the heat radiation plate can be eliminated and it is therefore possible to maintain high output and achieve downsizing.

Abstract: One object of the present invention is to provide a magnetic coupling coil component having a coupling coefficient that can be readily adjusted. A coil component according to one embodiment of the present invention includes: a drum core including a winding core, a first flange, and a second flange, the first flange being provided on one axial end of the winding core, the second flange being provided on another axial end of the winding core; a spacer provided on a surface of the winding core between the first flange and the second flange, the spacer being separate from the winding core; a first winding wire wound around the winding core between the first flange and the spacer; and a second winding wire wound around the winding core between the second flange and the spacer.

Abstract: A coil component may include a body having one surface and the other surface facing each other, and including a molded portion having a core and a cover portion disposed on the molded portion; a wound coil disposed between the molded portion and the cover portion and wound around the core; and a first accommodation groove and a second accommodation groove disposed on the one surface of the body to be spaced apart from each other, and respectively disposed outside of a region of the body corresponding to the core, wherein both end portions of the wound coil are respectively disposed in the first and second accommodation grooves, and a minimum value of a distance between the first and second accommodation grooves is greater than a diameter of the core.

Abstract: Magnetic core for a balun, balun with a magnetic core and method for manufacturing a magnetic core. In particular, a magnetic core is provided comprising multiple core elements, wherein the individual core elements are concentrically arranged. Furthermore, a heat sink is arranged between two adjacent core elements. By using multiple core elements for a magnetic core, the individual core elements can be adapted to different frequency ranges. In this way, the magnetic core may be used for a balun having a broad frequency range. Furthermore, thermal energy generated in the magnetic core can be dissipated by the heat sinks between the individual core elements. In this way, the power handling capability of the magnetic core can be increased.

Abstract: A coil component according to one aspect of the present invention includes: a magnetic base body containing a plurality of metal magnetic particles and a binder binding the plurality of metal magnetic particles together; and a coil conductor provided in the magnetic base body and including a winding portion wound around a coil axis, wherein as viewed from a direction of the coil axis, the magnetic base body includes a core region enclosed by the winding portion, and a ratio of an area of the core region to a sum of an area of the winding portion and the area of the core region is 32% or larger.

Abstract: A magnetic laminate having further suppressed magnetic saturation and higher DC superposition characteristics, a magnetic structure including the same, and an electronic component including the magnetic laminate or the magnetic structure. A magnetic laminate in which magnetic metal layers and non-magnetic metal layers are alternately laminated, wherein the non-magnetic metal layer is disposed between the magnetic metal layers; the magnetic metal layer contains an amorphous material; and the non-magnetic metal layer contains at least one element selected from the group consisting of Cr, Ru, Rh, Ir, Re, and Cu, and has an average thickness of 0.4 nm or more and 1.5 nm or less (i.e., from 0.4 nm to 1.5 nm).

Abstract: An inductor array component includes a substantially flat plate-shaped main body including a magnetic layer having resin and metal magnetic powder contained in the resin, a first inductor wiring and a second inductor wiring disposed on the same plane in the main body and adjacent to each other, and a plurality of first vertical wirings extending in a first direction of a normal direction with respect to the plane so as to penetrate through inside of the main body and being exposed on a side of a first main surface of the main body. Also, the inductor array component includes a plurality of second vertical wirings extending in a second direction of the normal direction with respect to the plane so as to penetrate through the inside of the main body and being exposed on a side of a second main surface of the main body.

Abstract: A resonant converter device comprising a selectable primary winding comprising a plurality of circuit legs, the selectable primary winding comprising one or more of a tapped primary winding or a plurality of switchable primary windings. At least one secondary winding coupled to the selectable primary winding to form a resonant transformer. At least one resonant inductor coupled to at least one of the plurality of circuit legs. A plurality of resonant capacitors, each circuit leg comprising at least a respective one of the plurality of resonant capacitors, and at least a second resonant capacitor of the plurality of resonant capacitors coupled within the second circuit leg. And, one or more switching devices connected to the resonant transformer and configured to selectively vary a resonant impedance of the resonant converter device when a voltage inputted to the resonant converter device varies.

Abstract: A magnetic and electrical circuit element including magnetic-flux-conducting posts, and a multi-layer structure formed with an electrically-conductive material. The multi-layer structure includes multiple layers forming a stack of layers along a length of the posts, said multi-layer structure configured as primary and secondary windings of a transformer. The primary winding is embedded in the multi-layer structure and wound around the magnetic-flux-conducting posts in such a way that a magnetic field induced in each of the magnetic-flux-conducting posts has a magnetic field polarity opposite to a polarity of the respective magnetic field of the magnetic-flux-conducting post adjacent the respective magnetic-flux-conducting post. Around each of the magnetic-flux-conducting posts, there is a respective one of the secondary windings connected to a semiconductor device.

Abstract: A semiconductor package includes a VLSI semiconductor die and one or more output circuits connected to supply power to the die mounted to a package substrate. The output circuit(s), which include a transformer and rectification circuitry, provide current multiplication at an essentially fixed conversion ratio, K, in the semiconductor package, receiving AC power at a relatively high voltage and delivering DC power at a relatively low voltage to the die. The output circuits may be connected in series or parallel as needed. A driver circuit may be provided outside the semiconductor package for receiving power from a source and driving the transformer in the output circuit(s), preferably with sinusoidal currents. The driver circuit may drive a plurality of output circuits. The semiconductor package may require far fewer interface connections for supplying power to the die.

Abstract: A single-phase reactor includes an outer peripheral iron core, at least four iron cores, which are in contact with or coupled to the inner surface of the outer peripheral iron core, and coils which are wound around at least two iron cores of the at least four iron cores. Gaps, which can be magnetically coupled, are each formed between two adjacent ones of the at least four iron cores, or are formed between the at least four iron cores and a central iron core positioned at the center of the outer peripheral iron core.

Abstract: A magnetic dev ice includes a core structure, at least one inductor winding and at least two transformer windings. The core structure includes at least one inductor column and at least two transformer columns. The at least one inductor winding respectively winds around the at least one inductor column. The at least two transformer windings, wind around the at least two transformer columns respectively, and the transformer winding includes primary winding and secondary winding. Wherein the magnetic flax directions on adjacent transformer columns are opposite to each other when providing a current in the corresponding primary windings simultaneously.

Abstract: A three-phase reactor includes: an outer peripheral iron core; and at least three iron-core coils that come in contact with an inner surface of the outer peripheral iron core or are joined to the inner surface. The at least three iron-core coils include corresponding iron cores and corresponding coils wound around the iron cores, and gaps that can magnetically connect one iron-core coil of the at least three iron-core coils and an iron-core coil adjacent to the one iron-core coil to each other are formed between the one iron-core coil of the at least three iron-core coils and the iron-core coil adjacent to the one iron-core coil.

Abstract: A coil component includes: a coil embedded in a substrate body and having a winding part constituted by a wound conductor; wherein the substrate body has: a first region sandwiched between one end surface of the substrate body and a plane parallel with the one end surface and running through a portion of a first external electrode farthest away from the one end surface; a second region sandwiched between another end of the substrate body and a plane parallel with the another end surface and running through a portion of a second external electrode farthest away from the another end surface; and a third region between the first region and the second region; and the winding part is provided in the third region, and also in the first region where it is wound by one turn or more.

Abstract: A reactor includes a coil, an annular magnetic core that forms a closed magnetic circuit when the coil is excited, a plurality of divided reactors arranged in parallel, and a holding member that holds the plurality of divided reactors in a state in which the divided reactors are arranged in parallel at a predetermined spacing. Each of the divided reactors includes a coil unit that is formed of a wound wire and constitutes a part of the coil and a core unit that passes through the coil unit from one end of the coil unit to the other end and constitutes a part of the magnetic core. The core unit has an inner core portion inserted through the coil unit, and outer core portions that protrude from both ends of the coil unit and extend in a direction that intersects the inner core portion.

Abstract: A wetmate connector for wirelessly communicating data or power signals between first and second components includes a first connector half which is mountable to the first component and a second connector half which is mountable to the second component. The first connector half includes a first internal cavity and a first wireless communications device which is positioned in the first internal cavity. The first wireless communications device is operable to transmit or receive wireless data and/or power signals, and the first internal cavity is sealed from an external environment at least when the first connector half is mounted to the first component. The second connector half includes a second internal cavity and a second wireless communications device which is positioned in the second internal cavity.

Abstract: An integrated magnetic current sensor is provided. Aspects include a first transformer comprising a magnetic core, a first primary winding and a first secondary winding, a voltage source configured to supply a first alternating current (AC) voltage to the first secondary winding, a second transformer comprising, the magnetic core, a second primary winding, a second secondary winding, and a third secondary winding, wherein the first primary winding and the second primary winding are connected in series, and a bi-directional current source configured to bias a magnetic field in the magnetic core by supplying a current to the second secondary winding responsive to a sense current flowing through the first primary winding and the second primary winding.

Abstract: A power inductor includes a housing and a magnetic core disposed in the housing. The core includes a first segment and a second segment spaced apart from each other to define a gap. The first and second segments are supported in the housing such that the they are movable relative to each other to increase and decrease the size of the gap. A fluid having a positive thermal expansion coefficient is disposed in the housing such that expansion and contraction of the fluid due to change in temperature increases and decreases the gap, respectively.

Abstract: An inductor that is configured to store energy in a magnetic field includes a wire and a core. The wire is configured to deliver electrical current to the inductor to generate the magnetic field. The core is disposed radially about the wire. The core comprises magnetic particles that are suspended in a non-magnetic matrix. The magnetic particles are arranged such that a magnetic permeability of the core increases in a direction that extends radially outward from the wire along a cross-sectional area of the magnetic core from a first region that is adjacent to the wire to a second region that is adjacent to an outer periphery of the magnetic core.

Abstract: A core main body includes an outer peripheral iron core, and at least three iron cores. Between the two iron cores adjacent to each other, a gap being magnetically couplable is formed. The outer peripheral iron core includes a first outer peripheral iron core block and a second outer peripheral iron core block that are formed by stacking a plurality of magnetic plates, and an intermediate plate disposed therebetween. The intermediate plate includes an outer peripheral iron core corresponding portion corresponding to the outer peripheral iron core, a plurality of protruding sections protruding from an outer peripheral surface of the outer peripheral iron core, and engaging sections provided on the plurality of protruding sections.

Abstract: A core component is made of a sintered body of an inorganic powder, in which the core component includes a columnar winding portion around which a conductive wire is wound, the columnar winding portion having a first axial end and a second axial end and a flange portion integrally formed with the winding portion at both axial ends of the winding portion, in which the columnar winding portion includes, in a cross section orthogonal to an axial center, a first region having a curved outer peripheral surface having a first radius of curvature and a second region having a curved surface having a second radius of curvature, the second radius of curvature is smaller than the first radius of curvature and the first region and the second region are connected with each other via a first projection.

Abstract: A magnetic device comprises two base portions and magnetic pillars, wherein each of the two base portions has a first surface and the two first surfaces are faced to each other, and the magnetic pillars are disposed between the two first surfaces along a first direction, wherein, in the first direction, two of the magnetic pillars located at the outermost side of the base portion are a first corner pillar and a second corner pillar respectively, n of the magnetic pillars having the same cross-sectional area and located at the center position of the base portion are n center pillars, and cross-sectional area of the magnetic pillars are gradually increased from the first corner pillar to the center pillar closest to the first corner pillar, and from the second corner pillar to the center pillar closest to the second corner pillar.

Abstract: A transformer, a method for manufacturing the same and an electromagnetic device are disclosed. The transformer includes a base plate, a magnetic core, transmission wire layers and conductive parts. The base plate includes a central part defining multiple inner via holes each running through the base plate and a peripheral part defining multiple outer via holes each running through the base plate. An annular accommodating groove is defined between the central pan and the peripheral part. The magnetic core is received in the accommodating groove. The transmission wire layers may be disposed respectively on two opposite sides of the base plate. Each of the transmission wire layers includes multiple wire patterns. Multiple conductive parts are respectively disposed in the inner via holes and the outer via holes.

Abstract: A manufacturing method of a reactor includes: a coil mold step of forming a coil mold in which a first resin is molded to cover at least part of a coil; and a main body mold step of forming a main body mold in which a second resin is molded to cover at least part of an assembly body in which the coil, the coil mold, two I-cores, and an O-core surrounding the coil and the coil mold are assembled. In the coil mold step, a gap plate configured to fill a gap between positions where the two I-cores are placed is formed by molding with the first resin. In the main body mold step, gap plates each configured to fill a gap between the O-core and a corresponding one of the I-cores are formed by molding with the second resin.

Abstract: An in-vehicle motor-driven compressor includes a common mode choke coil including an annular core having a through-hole, a first winding and a second winding wound around the core, and an annular conductor. The second winding is opposed to the first winding while being spaced apart from the first winding. The conductor surrounds the first and second windings, and the core. The conductor includes sections opposed to each other with the through-hole in between. The core is symmetrical with respect to at least one symmetry axis when the through-hole is viewed from the front. The first winding is located on one side of the at least one symmetry axis, and the second winding is located on the other side of the symmetry axis, so that the at least one symmetry axis is located between the first and second windings. The core includes an exposed section not covered with the conductor.

Abstract: Disclosed herein is a coil component that includes: a first magnetic core extending in the first direction and around which the wires are wound; a second magnetic core covering the first magnetic core from one side in a third direction; first and second terminal electrodes connected respectively to one ends of the first and second wires; and third and fourth terminal electrodes connected respectively to other ends of the first and second wires. The first and second electrodes are arranged in the first direction along the first surface of the first magnetic core, and the third and fourth terminal electrodes are arranged in the first direction along the second surface of the first magnetic core.

Abstract: The present invention is directed to a method for producing induced electricity which prevents a collision by guiding induced electromagnetic force generated from a power generation coil as electricity is produced in the power generation coil to a predetermined location deviating from the path of power generation magnetic force which proceeds to be interlinked with the power generation coil to thus prevent power generation resistance from occurring and also produces electricity by interlinking the induced electromagnetic force with the power generation coil. The present invention is also directed to a “method for producing electricity using the induced electromagnetic force of a power generation coil” which uses an energy source for the production of electricity without conversion, so that there are no loss of energy during an energy conversion process and maintenance and management are easy, thereby reducing costs.

Abstract: A coil device includes a core and a plurality of coils arranged in the core. A distance of a second gap formed by portions of the core located inside at least one of the coils is larger than that of a first gap formed by other portions of the core located between the coils next to each other.

Abstract: An inductor includes a plurality of stacked core parts having aligned central openings, at least one spacer separating the core parts from one another, and a winding comprising a plurality turns wound around the stack of core parts through central openings of the core parts. The at least one spacer may include respective groups of spacers disposed between respective pairs of the core parts. In some embodiments, the at least one spacer may include a plurality of spacers disposed between first and second ones of the core parts and radially distributed in a circular pattern aligned with the first and second core parts.

Abstract: A vapor delivery device includes an induction coil system. The induction coil system can include a coiled fluid tube, a coiled wire, a capsule between the coiled fluid tube and the wire, and a cooling fluid supply configured to force a cooling fluid through the capsule across the coiled wire. The induction coil system can include a closed loop ferrite core, a wire coiled around a first portion of the ferrite core, and a fluid tube coiled around a second portion of the ferrite core. A wire coil can be contained in a cartridge system removably coupleable to a disposable vapor delivery device. The system can include a fluid flow controller and induction power regulation to maintain a specific operating pressure range for vapor within a uterus or other bodily cavity, tract, or duct.

Abstract: An electrical component, a component arrangement and a method for producing a component arrangement are disclosed. In an embodiment an electrical component includes a coil form and a winding of a wire around the coil form and a connection area comprising a wire end of the wire, wherein the connection area is configured to latch with a mounting facility.

Abstract: A surface mountable housing for a power transmitter for wireless power transfer includes a connector system configured for use to mount, at least, a transmitter antenna to an underside of a structural surface, such that the transmitter antenna is configured to couple with a receiver antenna of a power receiver when the receiver antenna is proximate to a top side of the structural surface. The surface mountable housing further includes a heat sink, the heat sink configured to rest, at least in part, below the transmitter antenna, when the power transmitter is connected to the structural surface, and configured to direct heat generated by the power transmitter away from the structural surface, and an antenna housing, the antenna housing substantially surrounding a side wall of the transmitter antenna, the antenna housing connected to the heat sink and positioned between the heat sink and the structural surface.

Abstract: A magnetic element, a power module and a power conversion system are provided. The magnetic element includes a main body, a plurality of first magnetic posts, a first common magnetic post and a second magnetic post. A first lateral edge and a second lateral edge of the main body are opposite to each other and extended along a first direction. A third lateral edge and a fourth lateral edge of the main body are opposite to each other and extended along a second direction. The plurality of first magnetic posts are disposed on the main body and arranged along the first direction. The first common magnetic post is disposed on the main body and located at the first magnetic posts. The second magnetic post is disposed on the main body and located at the first common magnetic post.

Abstract: A coil component includes a magnetic laminate, a coil conductor having conductor patterns disposed in the magnetic laminate and extending around the coil axis, and a cover layer disposed on one end of the magnetic laminate in the direction along the coil axis. The magnetic laminate includes first magnetic layers disposed between the conductor patterns, and second magnetic layers disposed between the first magnetic layers. The first magnetic layers contain first soft magnetic metal particles having a first average particle size, the second magnetic layers contain second soft magnetic metal particles having a second average particle size, the cover layer contains third soft magnetic metal particles having a third average particle size larger than the second average particle size. In the direction perpendicular to the coil axis A, the first magnetic layers project outward from the second magnetic layers, and the second magnetic layers project outward from the cover layer.

Abstract: A surface mountable housing for a power transmitter for wireless power transfer includes a connector system configured for use to mount, at least, a transmitter antenna to an underside of a structural surface, such that the transmitter antenna is configured to couple with a receiver antenna of a power receiver when the receiver antenna is proximate to a top side of the structural surface. The surface mountable housing further includes a heat sink, the heat sink configured to rest, at least in part, below the transmitter antenna, when the power transmitter is connected to the structural surface, and configured to direct heat generated by the power transmitter away from the structural surface, and an antenna housing, the antenna housing substantially surrounding a side wall of the transmitter antenna, the antenna housing connected to the heat sink and positioned between the heat sink and the structural surface.

Abstract: A trans-inductor voltage regulator (TLVR) circuit has multiple phases and a regulator block for each phase. Each regulator block has a winding of a transformer as an output inductor. The other windings of the transformers are connected in series with a nonlinear compensation inductor. The compensation inductor has a large inductance when the compensation inductor current is responsive to a steady state load current and has a small inductance when the compensation inductor current is responsive to a transient load current.

Abstract: A metal film includes portions that are opposed to each other and located away from each other between the first winding and the second winding. The metal film includes the first linear part that is thermally coupled to a housing. The average value of electric resistance per unit length in the peripheral direction of the first linear part of the metal film is greater than an average value of electric resistance per unit length of locations other than the first linear part.

Abstract: An electromagnet for a thermography system comprising a first elongated magnetic core spaced apart from a second elongated magnetic core; at least a first shorting bar connecting substantially at a first end of the first elongated magnetic core and a first end of the second elongated magnetic core; and at least a first excitation coil configured to conduct electrical current.

Abstract: Connectors that have a low profile, can form strong and reliable connections despite connection alignment errors, and can be readily manufactured. One example can provide a connector receptacle having a magnetic array arranged to provide a strong attachment that allows the use of a low profile connector receptacle and connector insert. The magnetic array can include magnets and magnetic elements, where the magnetic elements can be magnetically conductive pole-pieces. Each pole piece can have magnets at two of its sides. Another example can provide contacts for a connector insert that can have more than one contacting surface to connect to a contact of a connector receptacle.

Abstract: Current transducer including a housing comprising a coil support, a magnetic core extending between a first end and a second end, and a coil comprising a plurality of windings formed around the coil support. The coil support comprises a core receiving channel within which the magnetic core is inserted, the coil support comprising a radially inner support portion and a radially outer support portion between which the core receiving channel is disposed. The radially inner support portion is slidably movable with respect to the radially outer support portion.

Abstract: Disclosed herein is a coil component that includes: a first magnetic core extending in the first direction and around which the wires are wound; a second magnetic core having a first wall surface part covering the first magnetic core from one side in the second direction, a second wall surface part covering the first magnetic core from other side in the second direction, and a third wall surface part covering the first magnetic core from one side in the third direction; first and second terminal electrodes connected respectively to one ends of the wires and arranged in the first direction along the first wall surface part; and third and fourth terminal electrodes connected respectively to other ends of the wires and arranged in the first direction along the second wall surface part.

Abstract: The present invention relates to a magnetic core containing soft magnetic powder and a coil component using the magnetic core. The soft magnetic powder has particles each having at least one pore therein, and the number of pores present in a region of 2.5 mm square in a cross section of the magnetic core is 60×(?/80) or more and 10000×(?/80) or less, in which the volume packing density of the soft magnetic powder in the magnetic core is ?%.