A wireless power transmitter includes a first inductive element featuring a planar coil occupying a first plane and having first and second terminals, a first capacitive element connected to the first terminal, an inverter configured to provide an oscillating voltage signal to the first inductive element, through the first capacitive element, such that the first inductive element generates an oscillating magnetic field for transmitting power in response to the oscillating voltage signal, and a layer of magnetic material, disposed over the planar coil in a second plane parallel to the first plane.

In one aspect, a solenoid tube for a solenoid is provided. The solenoid tube includes a unitary body, an inner surface on the unitary body, and a plurality of dimples formed on the inner surface. The unitary body defines a generally cylindrical shape and includes a first end and a second end. The inner surface extends between the first open end and the second closed end. The plurality of dimples extend radially inward from the inner surface of the unitary body.

An electromagnetic actuator for a valve mechanism, in particular in a common rail system of a motor vehicle, comprising an armature tappet for actuating a valve element located in a channel, and comprising a pole core, the armature tappet being movable axially along a central axis of the actuator when an excitation coil of an excitation system is energized. The pole core therefore has a tubular shape and has a circumferential flange in the area of the pole core end facing the channel, said flange extending inward in relation to the central axis.

An electromagnetic actuator for a valve mechanism, in particular in a common rail system of a motor vehicle, comprising an armature tappet for actuating a valve element located in a channel, and comprising a pole core, the armature tappet being movable axially along a central axis of the actuator when an excitation coil of an excitation system is energized. The pole core therefore has a tubular shape and has a circumferential flange in the area of the pole core end facing the channel, said flange extending inward in relation to the central axis.

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.

An inductor includes a body including a support member having a first through-hole, a second through-hole, a first via-hole and a second via-hole, the first and second via-holes being spaced apart from the first and second through-holes, a first coil unit and a second coil unit disposed on one surface of the support member, a third coil unit and a fourth coil unit facing the one surface of the support member, and an encapsulant encapsulating the support member and the first to fourth coil units and including a magnetic material, and a first external electrode to a fourth external electrode respectively connected to the first to fourth coil units on an external surface of the body. The encapsulant includes a first encapsulant and a second encapsulant having magnetic permeability different from each other.

An inductor includes a body including a support member having a first through-hole, a second through-hole, a first via-hole and a second via-hole, the first and second via-holes being spaced apart from the first and second through-holes, a first coil unit and a second coil unit disposed on one surface of the support member, a third coil unit and a fourth coil unit facing the one surface of the support member, and an encapsulant encapsulating the support member and the first to fourth coil units and including a magnetic material, and a first external electrode to a fourth external electrode respectively connected to the first to fourth coil units on an external surface of the body. The encapsulant includes a first encapsulant and a second encapsulant having magnetic permeability different from each other.

This is a technology for non-contact power transmission to the laboratory animal biological information acquisition device 12 embedded in the multiple laboratory animals in the breeding cage 14, and provides the power reception device, which can observe the behavior of laboratory animals from outside without covering the breeding cage 14 with the power transmission side, and which can continuously supply power regardless of the direction and position of the laboratory animals. The secondary coil part 22 includes a magnetic core 31 having a circular cross-section perpendicular to the longitudinal direction, and a plurality of spiral coils 40a and 40b formed by winding a conductor so that the outer shape is substantially rectangular. The spiral coils 40a and 40b are arranged annularly in the circumferential direction of the magnetic core 31 so that the sides (40a1 and 40b1) and (40a2 and 40b2) are close to each other so as to cover the entire circumferential surface of the magnetic core 31 (arranged to form a ring).

Provided is a wireless power transfer antenna core. In the wireless power transfer antenna core according to an exemplary embodiment of the present invention, a conductive member configured to serve as an antenna for transmitting or receiving wireless power is wound multiple times along a longitudinal direction. The wireless power transfer antenna core is made of a magnetic body and comprises: a first portion having a first cross-sectional area; and a second portion extending with a predetermined length from an end of the first portion and second cross-sectional area that is relatively larger than the first cross-sectional area, wherein the conductive member is wound multiple times on the first portion.