A coil device includes a conductive wire forming a coil, a coil base having a groove for accommodating the conductive wire, and a stopper being separate from the coil base and attached to the coil base to cover the conductive wire. The stopper includes a base portion attached to the coil base at a position adjacent the groove, and a distal end portion integrated with the base portion to cover the conductive wire. The base portion of the stopper is rotatable. Alternatively, the distal end portion of the stopper is deformable.

The invention relates to an electrotechnical coil, to a method for producing same, and to an electromagnet or an electric machine comprising at least one such coil. The aim of the invention is to produce and use an electrotechnical coil for achieving an increased slot fill factor reliably and easily in a reproducible and economical manner. This is achieved in that the method according to the invention has the steps: step A: casting an electrotechnical coil with at least one winding which runs about a coil axis; and step B: shaping the coil, thereby changing the cross-section Q, Q′ of the at least one winding, such that the centroid FS, FS′ of the cross-section Q, Q′ of the at least one winding is displaced at least partly in the radial direction R relative to the coil axis A.

The invention relates to an electrotechnical coil, to a method for producing same, and to an electromagnet or an electric machine comprising at least one such coil. The aim of the invention is to produce and use an electrotechnical coil for achieving an increased slot fill factor reliably and easily in a reproducible and economical manner. This is achieved in that the method according to the invention has the steps: step A: casting an electrotechnical coil with at least one winding which runs about a coil axis; and step B: shaping the coil, thereby changing the cross-section Q, Q′ of the at least one winding, such that the centroid FS, FS′ of the cross-section Q, Q′ of the at least one winding is displaced at least partly in the radial direction R relative to the coil axis A.

Disclosed herein is a coil component that includes: a first magnetic core extending in the first direction and around which the wires are wound; a second magnetic core covering the first magnetic core from one side in a third direction; first and second terminal electrodes connected respectively to one ends of the first and second wires; and third and fourth terminal electrodes connected respectively to other ends of the first and second wires. The first and second electrodes are arranged in the first direction along the first surface of the first magnetic core, and the third and fourth terminal electrodes are arranged in the first direction along the second surface of the first magnetic core.

Disclosed herein is a coil component that includes: a first magnetic core extending in the first direction and around which the wires are wound; a second magnetic core covering the first magnetic core from one side in a third direction; first and second terminal electrodes connected respectively to one ends of the first and second wires; and third and fourth terminal electrodes connected respectively to other ends of the first and second wires. The first and second electrodes are arranged in the first direction along the first surface of the first magnetic core, and the third and fourth terminal electrodes are arranged in the first direction along the second surface of the first magnetic core.

An inductor includes an air-core coil assembled with a T-shaped core and a composite magnetic material and resin mixture embedding the T-shaped core and the air-core coil. The air-core coil has: a coil member having a coil axis and first and second sides opposite to each other; and first and second leads that are integrally connected to the coil member. The first and second leads respectively have: first and second bent members at the first side; first and second ends at the second side; and first and second bottom extensions respectively connected between the first and second bent members and the first and second ends. The first and second bent members extend in a first direction parallel to the coil axis, the first and second ends extend in a second direction parallel to the coil axis, and the first and second bottom extensions extend perpendicular to the coil axis.

An inductor includes an air-core coil assembled with a T-shaped core and a composite magnetic material and resin mixture embedding the T-shaped core and the air-core coil. The air-core coil has: a coil member having a coil axis and first and second sides opposite to each other; and first and second leads that are integrally connected to the coil member. The first and second leads respectively have: first and second bent members at the first side; first and second ends at the second side; and first and second bottom extensions respectively connected between the first and second bent members and the first and second ends. The first and second bent members extend in a first direction parallel to the coil axis, the first and second ends extend in a second direction parallel to the coil axis, and the first and second bottom extensions extend perpendicular to the coil axis.

A coil device includes: an inner core including a winding core portion wound by a wire, an upper flange portion with a first end portion on one side of the winding core portion, and a lower flange portion with a second end portion on the other side of the winding core portion; an outer core having an insertion hole and disposed outside the inner core, the inner core being inserted to the insertion hole; and a pair of terminal portions on the outer core, lead portions of the wire connect to the terminal portions. The number of wire turns along a radial direction of the winding core portion is larger on one side of the winding core portion than on the other side, and a wire winding end position is at the first end portion on the one side of the winding core portion with a wire winding start position.

The present disclosure provides a transformer module and a power module, wherein the transformer module comprises: a magnetic core, where a first insulating layer and a second wiring layer are sequentially disposed on the magnetic core from inside to outside; a first metal winding, wound around the magnetic core in a foil structure, and comprising a first winding segment formed in the first wiring layer and a second winding segment formed in the second wiring layer; and a second metal winding, wound around the magnetic core in a foil structure, comprising a third winding segment formed in the first wiring layer and a fourth winding segment formed in the second wiring.

The present disclosure provides a transformer module and a power module, wherein the transformer module comprises: a magnetic core, where a first insulating layer and a second wiring layer are sequentially disposed on the magnetic core from inside to outside; a first metal winding, wound around the magnetic core in a foil structure, and comprising a first winding segment formed in the first wiring layer and a second winding segment formed in the second wiring layer; and a second metal winding, wound around the magnetic core in a foil structure, comprising a third winding segment formed in the first wiring layer and a fourth winding segment formed in the second wiring.