A dry-type transformer core has an iron core with a number of limbs designed to be wrapped with a winding and interconnected by a number of magnetic yokes. The object is to produce a transformer of this type in a simple manner, which is especially well protected against corrosion. For that purpose, the dry-type transformer core includes a casing that is formed onto the iron core. The casing surrounds the iron core in a substantially flush manner.

A small size reactor that effectively utilizes a space is provided. This reactor includes: a reactor body which includes a core and a coil attached to the core, a casing which houses therein the reactor body and which has an opening where a part of the reactor body protrudes outwardly, a bus bar which is a conductive component electrically connected to the coil and which covers a part of a side of the reactor body protruding from the opening, and a terminal stage which includes an extended portion formed of a resin material where a part of the bus bar is embedded and provided along an edge of the opening, and which supports an electrical connection portion between the bus bar and an exterior.

A small size reactor that effectively utilizes a space is provided. This reactor includes: a reactor body which includes a core and a coil attached to the core, a casing which houses therein the reactor body and which has an opening where a part of the reactor body protrudes outwardly, a bus bar which is a conductive component electrically connected to the coil and which covers a part of a side of the reactor body protruding from the opening, and a terminal stage which includes an extended portion formed of a resin material where a part of the bus bar is embedded and provided along an edge of the opening, and which supports an electrical connection portion between the bus bar and an exterior.

Apparatus and associated methods relate to a linear variable differential transformer (LVDT) probe including a plunger rod and a metal sheet formed into a cylinder with a C-shaped cross-section, configured to couple to the plunger rod. In an illustrative example, the coupling may be an interference fit aided by spring retention forces of the metal sheet. The metal sheet may be stamped, formed and applied to the plunger rod without annealing. One or more longitudinal metal sheet edges may be rounded. The C-shaped metal sheet may be welded to the plunger rod at a distal and/or proximal end. In some examples, the longitudinal edges of the metal sheet may be welded together and/or to the plunger rod. The ratio of relative electromagnetic permeability of the metal sheet to the plunger rod may be greater than 10. Various implementations may advantageously reduce lot-to-lot variability and reduce the cost of producing LVDTs.

This invention entails the use of fractal shapes as cores for electromagnets, and a concurrent shape of a fractal for the windings which surround it. The novelty of this invention lies not only with the shaping, but the advantage of such shaping, which includes producing a smaller form factor electromagnet for the same desired magnetic field strength, when compared to a conventional electromagnet. It will be appreciated that a range of devices including electromagnets, based on such fractal shaping, are additionally novel and include but are not limited to solenoid switches, relays, and other devices in which the fractal electromagnets are used to make a change in state of some device.

This invention entails the use of fractal shapes as cores for electromagnets, and a concurrent shape of a fractal for the windings which surround it. The novelty of this invention lies not only with the shaping, but the advantage of such shaping, which includes producing a smaller form factor electromagnet for the same desired magnetic field strength, when compared to a conventional electromagnet. It will be appreciated that a range of devices including electromagnets, based on such fractal shaping, are additionally novel and include but are not limited to solenoid switches, relays, and other devices in which the fractal electromagnets are used to make a change in state of some device.

The present invention relates to a power conversion device, comprising: at least one resonant circuit comprising at least one resonant inductor and at least one resonant capacitor; a first transformer comprising a first primary winding which is electrically connected to the resonant circuit and at least one first secondary winding; and a second transformer comprising a second primary winding which is electrically connected to the resonant circuit and at least one second secondary winding, the second primary winding and the first primary winding are connected in parallel and have the same number of coil turns, and the second secondary winding and the first secondary winding have the same number of coil turns; an deviation of inductance between the first primary winding and the second primary winding meets |Lm1Lm2|/(Lm1+Lm2)<=30%, Lm1 is the inductance of the first primary winding, and Lm2 is the inductance of the second primary winding.

The present invention relates to a power conversion device, comprising: at least one resonant circuit comprising at least one resonant inductor and at least one resonant capacitor; a first transformer comprising a first primary winding which is electrically connected to the resonant circuit and at least one first secondary winding; and a second transformer comprising a second primary winding which is electrically connected to the resonant circuit and at least one second secondary winding, the second primary winding and the first primary winding are connected in parallel and have the same number of coil turns, and the second secondary winding and the first secondary winding have the same number of coil turns; an deviation of inductance between the first primary winding and the second primary winding meets |Lm1Lm2|/(Lm1+Lm2)<=30%, Lm1 is the inductance of the first primary winding, and Lm2 is the inductance of the second primary winding.

A solenoid valve provided with a valve element that abuts against and separates from a valve seat to seal fuel; a movable iron core capable of being separated from the valve element; and a fixed iron core arranged opposed to the movable iron core. The solenoid valve also includes: a first spring member that energizes the valve element toward a side of the valve seat; a second spring member that energizes the movable iron core toward the fixed iron core; and a stopper part disposed on the side of the valve seat with respect to the movable iron core, and arranged with the movable iron core via a gap in a displacement direction in a valve closed state. The gap is set so the movable iron core collides with the stopper part when being displaced in the valve closing direction after the valve element is opened.

A core includes a winding core, a first flange at a first end portion of the winding core, and a second flange at a second end portion of the winding core. The winding core has first and second surfaces on opposite sides, and first and second side surfaces intersecting the first and second surfaces and on opposite sides. The first flange has first and second surfaces on opposite sides, first and second side surfaces intersecting the first and second surfaces and located on opposite sides, an inner-side end surface connected to the first end portion of the winding core, and an outer-side end surface on an opposite side from the winding core. The inner-side end surface of the first flange has a first inclined surface between the first surface of the winding core and the first surface of the first flange.