Abstract: An electric power supply system, to which the electric field coupling electric power transmission technology is applied, includes an electric power transmission electrode for transmitting electric power from an electric power source, an electric power reception electrode that is disposed so as to contactlessly face the electric power transmission electrode to form a junction capacitance, and receives the electric power transmitted from the electric power transmission electrode through the junction capacitance, and a plasma generation unit for generating a plasma in a space between the electric power transmission electrode and the electric power reception electrode in which the junction capacitance is formed.

Abstract: A circulating-current reducing circuit is provided that can suppress a circulating current with a simplified configuration having no control circuit. The circulating-current reducing circuit is connected to a transformer unit to reduce circulating current. The transformer unit includes: a first transformer device; a second transformer device that is connected to the first transformer device in parallel; and a switching element that controls timing of supply of current to a primary coil portion of the first transformer device and a primary coil portion of the second transformer device. The circulating-current reducing circuit includes a first circuit that is connected between the primary coil portion of the first transformer device and the switching element, and a second circuit that is connected between the primary coil portion of the second transformer device and the switching element.

Abstract: A manufacturing method of a coil component including the steps of: holding a plurality of semi-finished products, each of which includes a base and a coil before forming the coil component, with a jig having a holding portion; setting the plurality of semi-finished products held by the jig to the setting positions of the jig in a mold; and sealing at least a portion within the base and the coil with resin by filling the resin into a cavity of the mold.

Abstract: An antenna device includes: a plurality of cores arranged in series; a coil; and a capacitor connected to the coil, in which a first core, which is selected from the plurality of cores, and a second core, which is selected from the plurality of cores and is arranged on any one end portion side of the first core, are arranged apart from each other, and in which at least one end surface, which is selected from an end surface of the first core on a side on which the second core is arranged and an end surface of the second core on a side on which the first core is arranged, is located on an inner peripheral side of the coil.

Abstract: A method for manufacturing an electronic component for avoiding electromagnetic interference includes: (a) placing a T-shaped core and an air-core coil in a metal mold; (b) injecting a mixture of a composite magnetic material and a resin into the metal mold so that the T-shaped core and the air-core coil are embedded by the mixture; (c) heating the mixture at a first temperature; (d) adjusting an outer shape while removing excessive mixture; and (e) hardening the mixture. The method may further include a process of polishing an outside of the hardened mixture. The method may further include a process of applying a pressure of 0.1 to 20.0 kg/cm2 to the mixture for adjusting an outer shape of the mixture by a movable punch of a press machine before the hardening process.

Abstract: An antenna device including: a core formed by a magnetic material; a terminal attachment unit which is arranged on one end side of the core and concurrently, which is provided with an opening portion of penetration-state; a coil which is arranged on the outer-peripheral side of the core and concurrently, which is formed by winding a conductive wire; and at least a pair of terminal members which are attached to the terminal attachment unit and concurrently, which are provided with a chip-support-piece portion positioned at the opening portion and concurrently electrically connected to an electronic component while being equipped with aforesaid electronic component having a chip-shape, wherein for the chip-support-piece portion, there is provided a positioner which carries out the positioning of the electronic component.

Abstract: An antenna device includes a core, a bobbin member having a partition, and a coil provided around the bobbin member. The coil is configured with a tight winding portion and a loose winding portion. The tight winding portion is provided between one bobbin side and the partition. The loose winding portion is provided between the other bobbin side and the partition. The loose winding portion is configured with a first winding layer and a second winding layer. A wire winding direction of the first winding layer is opposite to a wire winding direction of the second winding layer so that the wire of the first winding layer and the wire of the second winding layer cross and overlap to each other along part of the bobbin member.

Abstract: A coil component includes a core formed by a magnetic material, a coil embedded in the core, a part of a terminal portion of the coil protruded from a side surface of the core, and a tabular terminal, a part thereof protruded from the side surface of the core and partly connected with the protruded part of the terminal portion of the coil. The protruded part of the terminal portion of the coil and the protruded part of the tabular terminal are respectively bent toward the bottom surface side of the core along the side surface of the core, and the protruded and bent part of the terminal portion of the coil is arranged between the protruded and bent part of the tabular terminal and the core.

Abstract: A coil component 1 such as a solenoid valve is provided with a wiring part 20 formed by winding a conducting wire 4 therearound, and terminal electrodes 3A, 3B having connection terminals 16A, 16B electrically connected to the conducting wire 4. A locking piece 15A is provided on the terminal electrode 3A on a side of a wiring part for the connection terminal 16A, a starting end part of the conducting wire 4 is locked to the locking piece 15A, and the conducting wire 4 is led up in a direction reverse to a direction in which the wiring part 20 is arranged at a predetermined position, is passed into the connection terminal 16A so as to be electrically connected to the connection terminal 16A, and further led up in the direction reverse to the direction in which the wiring part 20 is arranged at a predetermined position.

Abstract: An antenna device including: a core formed by magnetic material; a terminal attachment unit arranged on one end side of the core; a coil which is arranged on the outer circumferential side of the core and concurrently, which is formed by winding a conductive wire; a plurality of terminal members which are mounted on the terminal attachment unit and concurrently, each of which is electrically connected with a terminal of the conductive wire or an electronic component at any position thereof; a connector connecting unit provided with a connector hole into which an external connector is inserted; and a partition unit partitioning the terminal attachment unit and the connector connecting unit, wherein a terminal hole is provided at the partition unit, and at least two or more of the terminal members are plugged-in into the terminal hole and concurrently, are mounted in a state of protruding toward the connector hole.

Abstract: A coil component has a core part 10 composing a closed magnetic path through which a closed loop of a magnetic flux passes, the magnetic flux being generated by two coils 14A, 14B that are arranged in parallel, and generate a magnetic field, and the core part 10 has a pair of I-type base cores 11A, 11B facing each other, and a pair of coupling core parts 11C, 11D. The coupling core parts 11C, 11D are each formed by linearly aligning three unit coupling cores 12A to 12F, and each of these cores 12A to 12F is formed into a configuration in which a column-shaped projection is provided on a core body, and a two-stage gap including a small gap and a large gap is to be formed mutually in a space in the adjacent unit cores 11A, 11B, and 12A to 12F by the configuration.

Abstract: A manufacturing method of a magnetic element including the steps of: sandwiching and holding at least one of a terminal unit and a coil terminal-end of a coil between a tubular-shaped upper-side die and a tubular-shaped lower-side die; filling a magnetic material in the tubular-shaped portion; and pressure-molding a core, whose side surface follows the inner walls of the upper-side die and the lower-side die by using an upper-side punch and also by using a lower-side punch, wherein at least a portion of the inner wall of the upper-side die and at least a portion of the inner wall of the lower-side die have respective different distances with respect to the center of the tubular-shaped portion, and in the step of pressure-molding, there is formed a core concave-portion having a step on the outside surface of the core, by transcription, and at least one of the terminal unit and the coil terminal-end is at the boundary.

Abstract: Provided is an antenna coil component including a bobbin around which a winding is wound, a base provided at least at one end side of the bobbin, and one or more metal terminals each fixed to the base, at least one metal terminal among these metal terminals including a fixing part for fixing the metal terminal to the base, a mounting part provided at a position away from the fixing part, and a neck part for connecting the fixing part and the mounting part to each other. The neck part has a length in a direction substantially orthogonal to a direction from the fixing part to the mounting part and substantially parallel to surfaces of the mounting part, which is narrower than that of the mounting part. Provided as well are an antenna unit using the antenna coil component, and a method of manufacturing the antenna coil component.

Abstract: A coil part includes: a bobbin including a flange part constituting a winding frame part around which a lead wire is to be wound; a core attached to the bobbin; and a core pressing part which is provided integrally with the flange part, includes a pressing plate part facing the flange part to form a first gap, and presses the core between the flange part and the pressing plate part by inserting at least a part of the core into the first gap.

Abstract: An art includes a core part 10 provided with central leg parts 13A, 13B and right and left leg parts 11A, 11B, 12A, 12B arranged on both sides of the central leg parts 13A, 13B; a coil part 20 formed by winding a conducting wire around a circumference of the central leg parts 13A, 13B; and a heat transfer sheet 30 for dissipating heat in the coil part 20 to outside, in which the coil part 20 is configured in such a manner that a rectangular wire is wound around the circumference of the central leg parts by edgewise winding and a circumference of the coil part 20 wound therearound is abutted on the heat transfer sheet 30.

Abstract: A manufacturing method of a coil component including the steps of: assembling and forming a coil assembly body in which a coil is attached to a magnetic-body core; and inputting the coil assembly body and a putty-like admixture including magnetic powders and a thermosetting resin into an inner cylindrical portion of a die, further including the steps of: pressing the admixture which is inputted into the inner cylindrical portion, applying vibration for giving shear force with respect to the admixture which is inputted into the inner cylindrical portion for decreasing the viscosity of the aforesaid admixture, and thermosetting and forming a magnetic cover portion by heating an integrated object comprised of the admixture which was applied with the vibration and the coil assembly body and by thermally-curing the thermosetting resin included in the admixture.

Abstract: A small size transformer is provided with hollow bobbin which has flange-shaped end parts at least on both ends of winding shaft part around which conducting wire formed of reinforced insulation wire is wound, and is formed by through-hole being pierced between the flange parts, box-shaped cover member to be covered on an outside of the bobbin, and magnetic core part formed by combining two E-shaped core members in a manner of surrounding side surface outer circumferential part of cover member, in which middle leg portions of the core members are configured in a manner of being inserted into the through-hole of the bobbin, in which sidewall parts of cover member to be interposed between the wiring part wound around bobbin and the core members are not provided therebetween.

Abstract: An electric current detector which is mountable on a circuit board on which there is mounted a fluxgate-type magnetic sensor IC chip which detects magnetic flux for electric current detection, including: a substantially ring-shaped core which forms a magnetic-path for magnetic flux induced by detection-target electric current, wherein the core includes a gap which is arranged to become substantially parallel with respect to the circuit board when mounting the aforesaid electric current detector on the circuit board and which is at a place positioned on or on the upper side of the magnetic sensor IC chip in the magnetic-path when mounting the aforesaid electric current detector on the circuit board.

Abstract: A coil end connecting structure for connecting a coil end part extending from a coil winding part formed by winding a flat wire, includes: a narrow-width part which is formed by forming a cut part made by cutting out the coil end part on a tip side at least on one side in a width direction thereof; an end connecting member which includes a cylinder body part in a cylindrical shape and in which the narrow-width part is inserted in an inner cylinder part of the cylinder body part; and a crimp part which crimps the cylinder body part to electrically connect the narrow-width part and the end connecting member.