An improved electrical coil unit is described which includes generally a coil member encapsulated within an iron-containing metal housing wherein the housing has an increased surface area to better transfer heat and provide air flow during operation. Each coil unit includes a coil member comprising a bobbin made of a non-conducting fiberglass impregnated resin and an insulated copper wire coiled around the outer surface of the bobbin member in multiple layers. Each coil unit is housed in an iron containing metal housing. The exterior surface of the housing preferably includes a plurality of fins extending longitudinally around the housing. A coating material is provided to encapsulate the coil member within the housing to form an integrated coil unit. The integrated coil units may be stacked to form a coil stack assembly.

An electrical transformer includes a coil pack including windings, and spacers axially spacing turns of the windings from one another and being formed of a thermoplastic material. Sticks couple and position the spacers. The coil pack has high resistivity to creep and permits temperature rise without degradation of transformer insulation, providing for extended service life and unique methods of transformer system upgrade.

Systems and methods for transformer cooling by vertical airflow are described. One embodiment of an air transfer unit includes an assembly frame that includes an interior portion and defines a lateral side, an upper side, and a lower side, where the assembly frame includes a length that is substantially the same as a width of a plurality of cooling fins on a transformer. Some embodiments include a plurality of air directing apparatuses that are positioned in the interior portion and are aligned along the length of the assembly frame, where the plurality of air directing apparatuses receive airflow from the lateral side and direct the airflow vertically through the upper side to further cool the plurality of cooling fins. Similarly, some embodiments include an exhaust screen that is coupled to the upper side, wherein the exhaust screen further consolidates the airflow vertically toward the plurality of cooling fins.

Provided is a wireless power transmission device. A wireless power transmission device includes: at least one antenna for wireless power transmission disposed on one side of a magnetic shielding sheet; a support plate having at least one receiving groove formed therein for receiving the antenna for wireless power transmission; and an antenna for wireless communication disposed along a side portion of the support plate.

A converter for a vehicle including an inductor which includes at least one coil, a core including a first region having an annular planar shape, around which the at least one coil is wound, and a second region having at least one first through-hole, a case accommodating the at least one coil and the core and including at least one cooling rod inserted into the at least one first through-hole, and a fixing bolt fastened to the at least one cooling rod exposed through the at least one first through-hole to fix the core to the case.

A high-voltage noise filter of a power conversion device includes: a metal housing; an anode bus bar connecting anodes of a power source and a power module; a cathode bus bar connecting cathodes thereof; a first magnetic core having a through hole where the anode bus bar and the cathode bus bar pass through; an X capacitor having one end connected to the anode bus bar, and the other end connected to the cathode bus bar; a first Y capacitor having one end connected to the anode bus bar, and the other end grounded; a second Y capacitor having one end connected to the cathode bus bar, and the other end grounded; and a first cooling unit connected to the first magnetic core and the metal housing. The anode bus bar partly faces the first cooling unit, and the cathode bus bar partly faces the first cooling unit.

A power reception device includes a first case having an accommodation portion formed therein, a core disposed in the first case, a second coil disposed in the first case and provided on the core, a first electrical device disposed in the first case and connected to the second coil, a first insulation member disposed between an inner surface of the first case and the second coil, and between the inner surface of the first case and the first electrical device, and a cooling device that causes a flow of a coolant to cool the second coil and the first electrical device, the second coil and the first electrical device being attached to the inner surface of the first case with the first insulation member interposed therebetween, the first electrical device being disposed upstream in a flow direction of the coolant from the second coil.

A power converter is provided that includes a reactor that is improved in effect of cooling a core and a winding. The power converter includes: a cooling member having a first cooling surface; and a reactor including a core portion and a winding portion. The core portion is a rectangular parallelepiped and disposed on the first cooling surface that is larger in area than the core portion in a plan view. The winding is wound around the core portion and the cooling member. The power converter further includes a power conversion module connected to one end of the winding portion.

A transformer cooling system is described. The transformer cooling system includes a dry transformer and a housing for the dry transformer. The dry transformer includes a core including a leg. Additionally, the dry transformer includes a winding body arranged around the leg. Further, a cooling channel extending in a direction of a longitudinal axis of the winding body is provided. Additionally, the transformer cooling system includes a heat exchanger adapted to dissipate heat from the housing. Further, the transformer cooling system includes a flow generating device arranged in the housing for providing a cooling flow in the cooling channel. The flow generating device is connected to the heat exchanger.

A stationary induction apparatus includes a core, a winding, a tank, a refrigerant, a radiator, and a unit cooler. The winding is wound around the core as a central axis. The tank contains the core and the winding. The refrigerant is filled into the tank. The radiator is mounted to the tank and includes a first heat exchange unit capable of naturally air-cooling the refrigerant that is naturally convecting while allowing the refrigerant to flow therethrough. The unit cooler is mounted to the tank and includes a pump to forcibly circulate the refrigerant, and a second heat exchange unit to forcibly air-cool the refrigerant that is being forcibly circulated while allowing the refrigerant to flow therethrough.