The present invention provides a multi-coil inductive power transfer primary comprising a plurality of coil. A power transfer regime is selected based on a determined load on each of the plurality of coils.

Provided is an antenna structure configured to wirelessly charge, the antenna structure including an insulating substrate, a coil formed on a first surface of the insulating substrate in a winding structure, the coil being wound a certain number of times in a clockwise and/or a counterclockwise direction around an axis normal to the insulating substrate, a coating layer including a first magnetic material, the coating layer being disposed adjacent to and surrounding the coil in a winding structure corresponding to the winding structure of the coil, and a shielding sheet including a second magnetic material and facing the second surface of the insulating substrate.

A power module of a medium-high-voltage isolated converter is disclosed. The power module includes a first circuit, a second circuit, a transformer and a shielding structure. A potential of the first circuit is greater than a potential of the second circuit. The transformer includes a first leading wire electrically connected to the first circuit, and a second leading wire electrically connected to the second circuit. The shielding structure is disposed between the transformer and the second circuit. The second leading wire is electrically connected between the transformer and the second circuit through the shielding structure, and the shielding structure is maintained at a constant potential.

Electronic devices according to embodiments of the present technology may include a battery. The devices may include a nanocrystalline foil. The devices may include a wireless charging coil seated on the nanocrystalline foil. The devices may also include an integrated circuit configured to operate the wireless charging coil in a wireless charging transmission mode.

A planar coil (10) of the present disclosure includes a base (1) including a first surface (1a), a metal layer (2) located on the first surface (1a) and including a through hole (2a) and a plurality of voids (3), and a first fixing tool (8) inserted through the through hole (2a) and fixing the metal layer (2) to the first surface (1a) side of the base (1).

A coil component includes a body having one surface and the other surface opposing each other in one direction, and a plurality of walls each connecting the one surface to the other surface; a coil portion buried in the body, and having both ends exposing to one of the plurality of walls of the body; first and second external electrodes respectively including first and second terminal electrodes disposed on one surface of the body and spaced apart from each other, and first and second connection electrodes respectively connecting the first and second terminal electrodes to both ends of the coil portion; a first external insulating layer disposed on the other surface of the body; and a first shielding layer disposed on the external insulating layer.

An induction charging device for an electrically operated vehicle may include a sub-surface protection, a shield element, and an induction charging module. The shield element may include a recess. The sub-surface protection may include a receiving area. The recess and the receiving area may define an insertion area in which the induction charging module is arranged.

A transformer comprising a primary winding and a secondary winding. The primary winding has N.sub.2 number turns and having a first terminal and a second terminal. The secondary winding has having N.sub.1 fractional portions, which together form a full turn, are in close proximity to the primary winding to establish coupling between the primary winding and the N.sub.1 fractional coil portions, the transformer turn ratio from the primary winding to the secondary winding is N.sub.2:(N.sub.3/N.sub.1) where N.sub.2 is an integer equal to or greater than 1, N.sub.1 is an integer greater than or equal to 2, and N.sub.3 is an integer greater than or equal to 1. Also disclosed is a stacked integrated transformer having a primary winding and secondary winding of which one or both have a waterfall structure and a portion of which functions as a ground connected shield between the secondary winding and the primary winding.

The described shielding system comprises a first shield and a second shield. The first shield comprises a first plurality of conductive segments extending from a first location. The first plurality of conductive segments are separated from each other by a first plurality of gaps. The second shield comprises a second plurality of conductive segments extending from a second location. The second plurality of conductive segments are separated from each other by a second plurality of gaps. An insulator may be interposed between the first shield and the second shield. The first plurality of gaps may at least partially align with the second plurality of conductive segments and the second plurality of gaps may at least partially align with the first plurality of conductive segments.

An electric compressor includes a compression part, an electric motor, an inverter device, and a housing. The inverter device includes an inverter circuit, a noise reduction unit, and a circuit board. The noise reduction unit includes a common mode choke coil and a smoothing capacitor. The common mode choke coil includes an annular core, a pair of winding wires, and an annular electrical conductor. The electrical conductor is split into a first metal plate and a second metal plate in a circumferential direction. The first metal plate is thermally coupled to the housing. The second metal plate is electrically connected to the first metal plate. An electrical resistance value of the first metal plate is larger than that of the second metal plate.