Embodiments of the present invention relate to a wireless charging device. The wireless charging device includes a housing, an induction coil, a ferrite, a printed circuit board (PCB), and a fan. The housing includes a first surface and a second surface, a protrusion is disposed on the first surface, and the protrusion is configured to: support a to-be-charged device, and leave a gap between the to-be-charged device and the first surface when the to-be-charged device is installed on the wireless charging device. At least one first air guiding opening and at least one second air guiding opening are disposed on the housing. When the fan runs, the first air guiding opening, the fan, and the second air guiding opening form an air duct that passes through the ferrite and the PCB.

A transformer is disclosed. The transformer includes a first coil including a first stack of wire disks stacked in a first direction; an exterior barrier arranged to form a first air gap between outer sides of the wire disks of the first stack of wire disks and the exterior barrier; an interior barrier arranged to form a second air gap between inner sides of the wire disks of the first stack of wire disks and the interior barrier; a wind generator arranged to generate an air flow in the first direction; a core in the form of a cylinder that is surrounded by the first coil; and an air guiding plate fixed to one of the exterior barrier and the interior barrier, to guide the air flow in a second direction along first stack gaps between the wire disks of the first stack of wire disks. The transformer effectively improves the heat dissipation of the coil and thus allows a smaller transformer in size.

A power transformer including at least one primary side conductive piece, at least one secondary side conductive piece, a first conductive strip pin, a second conductive strip pin and an iron core set is provided. The at least one secondary side conductive piece is stacked to the at least one primary side conductive piece along an axis. The first conductive strip pin and the second conductive strip pin extend from the at least one secondary side conductive piece, and are bent and extend along the axis. The iron core set is coupled to the at least one primary side conductive piece and the at least one secondary side conductive piece. A circuit board module is further provided.

A power conversion apparatus includes a case having a heat-dissipation property, and including a housing part formed to surround a predetermined space, a resin material having a thermal conductivity, the resin material being provided in the predetermined space, a coil disposed in the predetermined space, a coil case having a shape that fits with the housing part, the coil case being configured to house the coil, and a power semiconductor device disposed along a side wall of the coil case. The power semiconductor device is pressed and fixed between a side wall of the housing part and the side wall of the coil case in a state where a heat dissipation surface is in contact with the side wall of the housing part.

A non-contact power transmission device according to one or more embodiments is disclosed, which may include a fixed portion, a rotating portion that rotates about an axis, and a base cover including these. The fixed portion includes a first coil, a first substrate, and a light emitting element. The rotating portion includes a second coil, a second substrate, a light receiving element, and a case cover. The case cover is formed with a heat dissipation opening having an inclined surface, and generates airflow in which air is sucked into the inside of the case cover and is discharged to the outside of the case cover, as the rotating portion rotates.

A device for wireless transmission of electrical energy to an energy receiver, including a support surface, on which the energy receiver is arranged during energy transmission. The device includes an induction coil for transmitting electrical energy and an air duct extending within the device from an opening formed in the support surface into the device. The opening is arranged over the induction coil. The air duct is routed through a winding of the induction coil, which is preferably arranged directly under the support surface. Advantageously, the support surface is essentially rectangular, and the opening is formed on or at least close to a longitudinal axis of the support surface and is formed at a distance from an edge of the support surface. At least one projection is formed on the support surface for holding the receiving unit at a distance from the support surface so that air conducted into the air duct can better flow underneath.

An apparatus includes a temperature sensor configured to measure a temperature of a dry-type transformer, and the temperature sensor is arranged on or proximate a conductor of the dry-type transformer and is covered by an insulating layer of the conductor. The apparatus further includes a passive wireless communication module configured to transmit the measured temperature to a reader. The temperature of the dry-type transformer can be measured accurately, thereby improving the reliability and safety of the dry-type transformer. Accordingly, temperature measurement for the dry-type transformer can work appropriately in a cost-effective and efficient way.

A cooling structure for a transformer according to an embodiment includes a coil and a partition member. The partition member covers the coil along the axial direction on the downstream side in the flow direction of the refrigerant that flows along the axial direction parallel to the center axis of the coil.

The present disclosure relates to the field of power electronics technology, and proposes a power module, including: a case and an isolating part disposed in the case; a first air duct and a second air duct stacked to each other, separated by the isolating part, and penetrated in a front-to-rear direction in the case; a high-voltage power unit; a low-voltage power unit; and a transformer, including a high-voltage portion and a low-voltage portion, wherein the high-voltage portion includes a first magnetic core and a high-voltage coil disposed on the first magnetic core, and the low-voltage portion includes a second magnetic core and a low-voltage coil disposed on the second magnetic core, wherein the high-voltage power unit and the high-voltage portion are disposed in the first air duct, and the low-voltage power unit and the low-voltage portion are disposed in the second air duct.

The present disclosure relates to a shield for wireless charging that is capable of improving the effect of dissipating heat generated in a transmit coil, a method of manufacturing the same, and a wireless charger using the same. The shield for wireless charging according to an embodiment of the present disclosure includes a seating part on which the transmit coil is seated; and a transfer part extended integrally to a lower portion of the seating part to transfer heat generated in the transmit coil, wherein a plurality of transmit coils are seated on the seating part, and a height of a seating area on which each transmit coil is seated is set different from a height of a seating area adjacent to each other.