A transformer according to one embodiment comprises: a core portion having an upper core and a lower core; and a coil portion disposed in the core portion, wherein: the coil portion includes a first coil wound in a first direction, a second coil wound in a second direction opposite to the first direction, and a third coil including a flat panel shape; the lower core includes a body portion, a first leg portion and a second leg portion protruding from the body portion, and a spacing portion formed between the first leg portion and the second leg portion; the first leg portion includes two first outer legs and a first intermediate leg disposed between the two first outer legs; the second leg portion includes two second outer legs and a second intermediate leg disposed between the two second outer legs; the first coil can be disposed to surround the first intermediate leg; and the second coil can be disposed to surround the second intermediate leg.

A transformer according to one embodiment comprises: a core portion having an upper core and a lower core; and a coil portion disposed in the core portion, wherein: the coil portion includes a first coil wound in a first direction, a second coil wound in a second direction opposite to the first direction, and a third coil including a flat panel shape; the lower core includes a body portion, a first leg portion and a second leg portion protruding from the body portion, and a spacing portion formed between the first leg portion and the second leg portion; the first leg portion includes two first outer legs and a first intermediate leg disposed between the two first outer legs; the second leg portion includes two second outer legs and a second intermediate leg disposed between the two second outer legs; the first coil can be disposed to surround the first intermediate leg; and the second coil can be disposed to surround the second intermediate leg.

An electromagnetic device and method for cooling the electromagnetic device comprising a permeable magnetic core having a plurality of legs, a former located adjacent the permeable magnetic core wherein the former is thermally conductive, and at least one winding configured to conduct an electrical current there through wound on the former, the at least one winding including a coil having a plurality of turns.

An electromagnetic device and method for cooling the electromagnetic device comprising a permeable magnetic core having a plurality of legs, a former located adjacent the permeable magnetic core wherein the former is thermally conductive, and at least one winding configured to conduct an electrical current there through wound on the former, the at least one winding including a coil having a plurality of turns.

A transformer that can easily cope with various input voltage specifications and that, has improved productivity is obtained. A transformer includes: a core portion for forming a magnetic circuit; and a primary-side winding and a secondary-side winding wound at the core portion. One or both of the primary-side winding and the secondary-side winding are divided into a plurality of division windings, and each of the plurality of the division windings of the at least one divided winding has a wound part wound at the core portion, and two extending members extending from both ends of the wound part. The extending members of the plurality of the division windings of the at least one divided winding are mutually connected, and a number of turns in the transformer of the at least one divided winding is set.

A magnetic component includes a magnetic body and a coil. The magnetic body includes an inner leg, at least one outer leg, a first bottom portion and a second bottom portion. The inner leg and the at least one outer leg protrude from the first bottom portion and the second bottom portion. A cross-sectional area of the inner leg is larger than a total cross-sectional area of the at least one outer leg. The coil is wound around the inner leg.

A magnetic structure for wireless power transfer has a plurality of pieces of magnetically permeable material arranged along a first dimension. Each piece is separated from a neighbouring piece by a gap defining a separation distance which is selected to prevent partial saturation of a region of the structure.

A magnetic structure for wireless power transfer has a plurality of pieces of magnetically permeable material arranged along a first dimension. Each piece is separated from a neighbouring piece by a gap defining a separation distance which is selected to prevent partial saturation of a region of the structure.

An embedded transformer module device includes an insulating substrate including a first side and a second side opposite to the first side and including a first cavity, a magnetic core in the first cavity, a primary winding wound horizontally around the magnetic core and having a spiral shape with more than one turn, and a secondary winding wound horizontally around the magnetic core, spaced away from the primary winding, and having a spiral shape with more than one turn.

A transformer includes: a base that is a plate-like member and has a first surface and a second surface, a core attached to the first surface of the base, coils wound around the core, coil terminals attached to the second surface of the base, and a cooling unit that is thermally connected to the core and is to release heat transferred from the core. The coil terminals are disposed on the second surface of the base opposite to the first surface of the base to which the core is attached. The cooling unit is disposed on a side of the core opposite to the base.