A cryogen-free high-temperature superconductor undulator structure is provided. The superconductor undulator structure includes a magnetic core body and a coil structure. The magnetic core body includes a first and a second half magnetic pole arrays that are vertically aligned, a plurality of first winding cores in the first half magnetic pole array, and a plurality of second winding cores in the second half magnetic pole array. The coil structure is wound on the first winding cores and the second winding cores of the magnetic core body. The coil structure includes a plurality of first superconductor tapes in contact with each of the first winding cores and each of the second winding cores, and a plurality of second superconductor tapes, each of the second superconductor tapes is in contact with two adjacent first superconductor tapes. A method of manufacturing a cryogen-free high-temperature superconductor undulator structure is also provided.

A magnetic part including: a coil that generates a magnetic flux when a current flows through the coil; a core that is formed of a magnetic substance that forms a magnetic path of the magnetic flux; a support member that supports the core; and a fixing member that fixes the core to the support member. The core includes a column portion that is vertically provided with respect to a surface where the core is in contact with the support member. The fixing member presses the column portion of the core against the support member. The support member has a recess in a portion of a facing surface that faces the core, where the portion of a facing surface does not face the column portion.

A coil component includes: a core part including: a winding shaft; and a planar flange part provided at an axial-direction end of the winding shaft, and having a groove part provided on an exterior face thereof where a lead part led out from a conductor wound around the winding shaft into the groove part, wherein the flange part has a first recessed part provided on a first side face intersecting with the long axis of the groove part and communicated with the groove part, wherein the area of a cross section, taken in a direction parallel with the first side face, of the first recessed part, is greater than the area of a cross section, taken in a direction parallel with the first side face.

A coupled inductor comprises an annular core 1 and coils 2a, 2b wound around the core. The annular core 1 includes a sendust core having a maximum differential permeability that is equal to or greater than 30.

An electromagnetic component assembly includes a first magnetic core piece, a second magnetic core piece, and an inverted U-shaped conductive winding including a base section and first and second legs extending from base section. One of the first and second magnetic core pieces is configured to receive the base section. The first and second magnetic core pieces are gapped from one another to define a first gap, and one of the first and second magnetic core pieces includes a second gap that, in combination with the first gap, allows the component to be operated at more than one stable open circuit inductance (OCL) corresponding to different current loads.

A reactor includes a coil having a winding portion, and a magnetic core including a core piece having an inner core portion disposed inside the winding portion. The core piece is a compact made of a composite material that contains a magnetic powder and a resin. The reactor further includes: a first projection that is integrated with and projects from an outer peripheral face of the inner core portion, and comes into contact with an inner peripheral face of the winding portion so as to position the winding portion in a diameter direction of the winding portion, and a second projection that is integrated with and projects from the core piece at a position opposing an end face of the winding portion, and comes into contact with the end face of the winding portion so as to position the winding portion in an axial direction thereof.

A coil component includes a winding core that includes a winding core portion, a first flange portion, and a second flange portion. The coil component further includes a plate core that has a main surface facing the winding core portion, the first flange portion, and the second flange portion, that extends between the first flange portion and the second flange portion, and that is secured to the winding core by using adhesive. Each of the first flange portion and the second flange portion has an upper surface that faces the main surface of the plate core. Recessed portions are formed on the corresponding upper surfaces. Protrusions may be formed in corresponding regions in which the recessed portions are formed.

There is provided a static induction electric apparatus capable of improving smoothnesses of magnetic flux distributions inside iron cores. A stationary induction electric apparatus including wound iron cores and a winding, wherein each of the wound iron cores is a laminated body of magnetic materials that are lap-joined and at least provided with a step lap joint portion on an inner peripheral side of the wound iron core, and gap distances between ends of the step lap joint potion are gradually shortened toward an outer peripheral side of the wound iron core. Although a configuration of the stationary induction electric apparatus is simple, the stationary induction electric apparatus having improved smoothnesses of magnetic flux distributions inside the iron cores can be provided.

A transformer includes a primary winding, a secondary winding, a first core, and a second core. The primary winding and the secondary winding are inserted into the first core and the second core, and the first core and the second core are disposed to face each other. The first core includes one first core portion, and the second core includes a plurality of second core portions. The first core is a lower core, and the second core is an upper core. The first core and the second core are disposed to face each other with a gap interposed between the first core and the second core. The first core and the second core include a heat-resistant elastic body in the gap, and are disposed to face each other. Each of the second core portions is disposed with a heat-resistant elastic body interposed between the second core portions.

An inductively powered device driver comprising a secondary winding to be coupled to a primary winding and a ferrite core formed of two separable parts, and further comprising a permanent magnet attached to each part of the ferrite core. The permanent magnet(s) are preferably separated from the ferrite core by an insulator. One part of the ferrite core preferably comprises a metal plate positioned between the two parts of the ferrite core.