Abstract: The invention relates to a tap changer for the interruption-free switchover between winding taps of a tap-changing transformer. Furthermore, the present invention relates to a novel vacuum interrupter which is particularly suitable for such a tap changer. The tap changer according to the invention is based on the general concept of combining in each case one main contact (V1) and one mechanical switching means (U1), connected in series therewith, of a first load branch and an additional resistive contact (V3) of a second load branch in only a single vacuum interrupter (1) with a common housing (5).

Abstract: A magnetic component such as a transformer or inductor comprises one or more litz-wire windings and one or more metallic cooling tube windings. Each litz-wire winding is wound together with a corresponding single metallic cooling tube winding on a common bobbin to provide an indirectly-cooled magnetic component.

Abstract: The device and manufacturing method for a Direct Current (DC) filter inductor are disclosed. The device comprises a magnetic core, at least one first winding and at least one second winding. The magnetic core has at least one air gap. The first winding and the second winding are connected to each other in parallel that having a mutual inductance, and are wrapped around the magnetic core respectively. A difference between a first inductance of the first winding and the mutual inductance is smaller than a difference between a second inductance of the second winding and the mutual inductance. A Direct Current (DC) resistance of the first winding is larger than a DC resistance of the second winding. The first winding is closer to the air gap compared to the second winding.

Abstract: A dry-type network transformer has a core and coil windings insulated by a combustion-inhibiting gas. The combustion-inhibiting gas, core and coil windings are disposed within a hermetically-sealed enclosure. The combustion-inhibiting gas is air, an inert gas or a mixture of gases. The dry-type network transformer may be connected to a network protector. The network protector is further connected to a secondary network. The network protector prevents power from flowing from a secondary network to the primary side of the transformer. The dry-type network transformer is installed in a vault that is underground or at ground level. The dry-type network transformer may be suspended near the ceiling of the vault or installed at the base of the vault.

Abstract: A magnetic device including a first magnetic core is disclosed. The first magnetic core includes a base having a first edge; a first contacting structure disposed on the base; and a second contacting structure disposed on the base, wherein a distance between an inner surface of the first contacting structure and the first edge is larger than a distance between an inner surface of the second contacting structure and the first edge.

Abstract: In a spark plug ignition assembly for a spark plug, an ignition coil assembly has a steel laminated core, said core having a first core portion and a second core portion, and a primary winding around the first core portion and a secondary winding around the primary winding. A spark plug connecting member is provided for connecting the coil assembly to the spark plug. At least one of the first and second core portions has a slot therein with a magnet located in the slot.

Abstract: An input device includes a first yoke; a substrate disposed on the first yoke; a coil disposed on the substrate; and a second yoke disposed above the coil and configured to be displaced downward by a force applied and thereby to change inductance of the coil. The input device is configured to output a signal corresponding to the amount of displacement of the second yoke. The substrate has an opening that communicates with a hollow of the coil, and the first yoke includes a step that is inserted into the opening of the substrate.

Abstract: A semiconductor inductor structure may include a first spiral structure, located on a first metal layer, having a first outer-spiral electrically conductive track and a first inner-spiral electrically conductive track separated from the first outer-spiral electrically conductive track by a first dielectric material. A second spiral structure, located on a second metal layer, having a second outer-spiral electrically conductive track and a second inner-spiral electrically conductive track separated from the second outer-spiral electrically conductive track by a second dielectric material may also be provided. The first outer-spiral electrically conductive track may be electrically coupled to the second outer-spiral electrically conductive track and the first inner-spiral electrically conductive track may be electrically coupled to the second inner-spiral electrically conductive track.

Abstract: In a laminated inductor element, outer electrodes and terminal electrodes are electrically connected by via holes, internal wiring lines, and end surface electrodes. The via holes on an upper surface side are provided immediately under the outer electrodes and in a non-magnetic ferrite layer. The via holes on a lower surface side are provided immediately above the terminal electrodes and in a non-magnetic ferrite layer. Since outermost layers are defined by the non-magnetic ferrite layers, a parasitic inductance is not increased, even if the outermost layers are provided with the via holes. In this case, the internal wiring lines are not routed on a surface of the element. Therefore, there is no complication of a wiring pattern, and it is possible to prevent an increase in a mounting area of the element.

Abstract: In a first mixing process, soft magnetic powders and inorganic insulative powders of 0.4-1.5 wt % relative to the soft magnetic powders are mixed. In the heating process, a mixture through the first mixing process is heated at a temperature of 1000° C. or more and below the sintering temperature of the soft magnetic powders under a non-oxidizing atmosphere. In the granulating process, a silane coupling agent of 0.1-0.5 wt % is added to form an adhesiveness enhancing layer. A silicon resin of 0.5-2.0 wt % is added to the soft magnetic alloy powders having the adhesiveness enhancing layer formed by the silane coupling agent to form a binding layer. A lubricating resin is mixed, and a mixture is pressed and molded to form a mold. In an annealing process, the mold is annealed under a non-oxidizing atmosphere to form a dust core which is used to form a reactor.

Abstract: An electronic component to be embedded in a substrate is configured so that planar coils protected by insulators are sandwiched be a pair of magnetic layers. Ports, or openings or absent parts are provided at predetermined positions of one or both of the magnetic layers, and the predetermined positions correspond to the positions opposite to terminal electrodes of the planar coils. Accordingly, a contribution to reduction of the size and weight of electronic equipment can be made.

Abstract: A corona igniter 20 includes a coil 24 with a plurality of copper windings 26 extending longitudinally along a coil center axis ac. A magnetic core 30 is disposed along the coil center axis ac between the windings 26 and includes a plurality of discrete sections 32. The discrete sections 32 are spaced axially from one another by a core gap 34 filled with a non-magnetic gap filler 78. The magnetic core 30 has a core length lm and the coil 24 has a coil length lc less than the core length lm. A coil former 62 having a former thickness tf spaces the coil 24 from the magnetic core 30. A length difference ld between the core length lm and the coil length lc is preferably equal to or greater than the former thickness tf.

Abstract: An apparatus is provided for securing to and collecting power from an electrical conductor including a wire clamp that clamps and secures to an electrical conductor, a current transformer (“CT”) that clamps to the electrical conductor and collects power from the electrical conductor, and a housing that supports the wire clamp and the current transformer. According to various aspects, the apparatus may include a wire clamp including a compression post and clamp arms that surround and compress an electrical conductor in a closed position of the wire clamp, where each of the clamp arms includes pivot posts, and the clamp arms pivot between closed and open positions. According to other various aspects, the apparatus may include a split magnetic core that surrounds an electrical conductor in a closed position of the current transformer, where the split magnetic core includes pivot posts, and the split magnetic core pivots between closed and open positions.

Abstract: An electrical coil assembly includes a first housing and a second housing that surroundingly encloses the first housing. The coil assembly includes a ferrite layer and a thermally-conductive silicone layer that overlies the ferrite layer. A wire conductor surrounds the first housing. A structure is received in an opening defined in the first housing to be in thermal communication with the thermally-conductive silicone layer. Another thermally-conductive silicone layer overlies the first housing and the structure so that the structure is also in thermal communication therewith. A metal layer further overlies the thermally-conductive silicone layer that overlies the first housing. The second housing includes a non-dielectric cover and a dielectric cavity portion that receives the first housing. The coil assembly is associated with an electrical charging system that electrically charges an energy storage device disposed on a motorized vehicle.

Abstract: A transformer having a high degree of coupling is connected between, for example, an antenna element and a power feed circuit. The transformer having a high degree of coupling includes a first inductance element connected to the power feed circuit and a second inductance element coupled to the first inductance element. A first end of the first inductance element is connected to the power feed circuit and a second end of the first inductance element is connected to the antenna element. A first end of the second inductance element is connected to the antenna element and a second end of the second inductance element is grounded.

Abstract: An electrical system having an underlying structure resembling the double helix most commonly associated with DNA may be used to produce useful electromagnetic fields for various applications.

Abstract: A trimmable inductor assembly is provided for optimal balancing of phase currents in a multi-phase resonant converter. A magnetic device includes first and second core portions defining an outer edge of the device having a first axis, and further defining a first air gap. A bracket is positioned proximate the outer edge of the device and a magnetic plate is coupled to the bracket, with the magnetic plate and the second core portion defining a second air gap. A positioning device is coupled to the bracket and is responsive to control signals based on a detected phase current imbalance to drive the bracket and the magnetic plate between a first position defining a minimum air gap for the assembly and a second position defining a maximum air gap for the assembly.

Abstract: A magnetic power converter has a core that has at least a first leg and a second leg. In addition, the magnetic power converter has an output coil positioned around the second leg and a toroid integrated into the first leg, the toroid comprising a permanent magnet and an first input coil, the input coil positioned relative to the permanent magnet, such that when an alternating current (A/C) is applied to the first input coil, permanent magnet magnetic flux produced by the permanent magnet is displaced and travels through the second leg.

Abstract: Provided are a wireless power communication system, including: a primary core where a primary coil, to which a current is applied, is wound; and a secondary core having a width wider than a width of the primary core, and receiving a secondary coil which outputs a current generated by a magnetic field, wherein the magnetic field is induced by the primary coil to the secondary coil, a wireless power transmission apparatus and a wireless power receiving apparatus therefor.

Abstract: A surface mount circuit protection device includes a laminar PTC resistive element having first and second major surfaces and a thickness therebetween. A first electrode layer substantially coextensive the first surface is formed of a first metal material of a type adapted to be soldered to a printed circuit substrate. A second electrode layer formed at the second major surface includes structure forming or defining a weld plate. The metal weld plate has a thermal mass and thickness capable of withstanding resistance micro spot welding of a strap interconnect without significant resultant damage to the device. The device is preferably surface mounted to a printed circuit board assembly forming a battery protection circuit connected to a battery/cell by battery strap interconnects, wherein one of the battery strap interconnects is micro spot welded to the weld plate of the device.