A dry-type transformer, comprises a magnetic core, at least one high voltage (HV) winding, and at least one low voltage (LV) winding inductively coupled to the magnetic core. The transformer is made by determining a shape of an electric field that is generated, 3D printing a dielectric structure shaped to conform to the determined shape of the electric field, and mounting the dielectric structure between the HV and LV windings. A dielectric barrier arrangement for electrically isolating a coil of a transformer assembly from a further coil of the transformer assembly or from a core of the transformer assembly comprises a first dielectric structure having a first cylindrical dielectric structure extending along a longitudinal axis (L).

A common mode choke apparatus includes a first bus bar forming a first plurality of loops about a first segment of a ferrite core, the first bus bar having a plurality of first upper surfaces, and a second bus bar forming a second plurality of loops about a second segment of the ferrite core, the second bus bar having a plurality of second upper surfaces.

A wireless charging device includes a casing, a transmitter driving board and a transmitter coil assembly. The wireless charging device is used for charging a receiver coil of a mobile device. The transmitter driving board generates a first heat source. The transmitter driving board has a first thermal resistance. The transmitter coil assembly generates a second heat source. The transmitter coil assembly has a second thermal resistance. There is an interfacial thermal resistance between the transmitter coil assembly and the transmitter driving board. A product of a power dissipation of the second heat source and the second thermal resistance is lower than 15. The interfacial thermal resistance is higher than or equal to two times the first thermal resistance. A product of a power dissipation of the first heat source and the first thermal resistance is lower than or equal to 80.

Disclosed is a system for recharging a selected power source wirelessly, such as through a power transmission. The power source may be positioned within a subject and be charged wirelessly through the subject, such as tissue of the subject. A thermal transfer system is provided to transfer or transport thermal energy from a first position to a second position, such as away from the subject.

Disclosed is a system for recharging a selected power source wirelessly, such as through a power transmission. The power source may be positioned within a subject and be charged wirelessly through the subject, such as tissue of the subject. A thermal transfer system is provided to transfer or transport thermal energy from a first position to a second position, such as away from the subject.

The invention relates to an electromechanical device (10) for an aircraft, comprising: —a housing (12) having a radially internal surface (S12), —a magnetic circuit formed by a stack of laminated sheets and composed of an annular yoke (16), said yoke being arranged on the radially internal surface of said housing, said yoke having a radially internal surface (S16), —at least one low-frequency coil component (18), said coil component being integrated over at least part of the radially internal surface of said yoke.

An electrical appliance for connecting to a high voltage includes an active part, which is provided with a magnetizable core and at least two winding assemblies, each surrounding a core section of the core and having windings that are inductively coupled to one another. The active part is entirely arranged a tank, which can be filled with an insulating fluid. The tank has two end casings and a central part arranged between the end casings. The electrical appliance is compact and has a low tare weight. The central part forms a hollow body for each winding assembly, through which a respective one of the core sections extends, which is surrounded by an associated winding assembly. The hollow bodies are connected to one another on the inside and only via the internal volume of the end casings.

In a coil component, heat radiation around a through conductor is improved. In the coil component, since the cross-sectional area of the inner end portion of the planar coil is designed to be relatively large, heat generated in the through conductor is easily transferred to the inner end portion. Since heat is efficiently transferred from the through conductor to the inner end portion, high heat radiation around the through conductor is achieved.

A ballast transformer and system using the ballast transformer to couple power to a plasma load. The ballast transformer has a magnetic core, a first primary winding on a primary side of the magnetic core, a secondary winding on a secondary side of the magnetic core, and a second primary winding connected in series with the first primary winding and wound in proximity to the secondary winding on the secondary side of the magnetic core. The first primary winding is connectable to the AC power source, and the secondary winding is connectable to the plasma load via a coaxial cable.

The isolation transformer includes two kinds of winding, a high voltage side winding and a low voltage side winding, and the high voltage side winding and the low voltage side winding are formed in winding layers, wherein the high voltage side winding includes windings formed in multiple winding layers, a winding layer having a different number of turns exists in one or more kinds of the two kinds of winding among the windings formed in the multiple winding layers, winding layers wherein current flows in the same direction are stacked in such a way as not to be neighboring, and at least one of winding layers having the greatest number of turns is disposed as a layer other than an outermost layer.