A reactor is equipped with a coil having unit coils. First spacers are disposed in at least one of spaces between the unit coils and in a space between one of the unit coils and a supporting frame. Second spacers are disposed between the first spacers. The supporting frames, the first spacers, and the second spacers are traversed by bolts and are fixed to the bolts. A space is defined between the bolt and a wall surface of a through hole formed in the first spacer and traversed by the bolt. A spacing distance between adjacent first spacers in the central axis direction of the coil is greater than a central-axis-direction thickness of the unit coil located between the adjacent first spacers, the central-axis-direction thickness of the unit coil being of when the coil is not energized.

An arrangement (10, 20, 30) id disclosed, comprising a magnetic element (10) and at least a first winding (10) and a second winding (20), wherein each of the first winding (20) and the second winding (30) is wound in a plurality of turns (41, 42, 43, 44, 51, 52, 53, 54) around at least a portion of the magnetic element (10), and wherein at least a part or portion of the plurality of turns (51, 52, 53, 54) of the second winding (30) wound around the at least a portion of the magnetic element is arranged in spaced relation to at least a part or portion of the plurality of turns (41, 42, 43, 44) of the first winding (20) wound around the at least a portion of the magnetic element (10), thereby defining at least one gap (61, 62) between the at least a part or portion of the plurality of turns (51, 52, 53, 54) of the second winding (30) and the at least a part or portion of the plurality of turns (41, 42, 43) of the first winding (20). At least the magnetic element (10) and the first winding (20) and the second winding (30) define an assembly of the arrangement (10, 20, 30), and wherein at least a part or portion of the assembly is arranged so as to be embedded in a thermally conductive material (70) and such that at the same time a flow of air in the at least one gap (61, 62) is permitted.

A medium conveying and heat exchange device and a vortex flow separator for an iron core of an electromagnetic device is provided. The vortex flow separator includes a jet pipe and a vortex flow separation pipe, the vortex flow separation pipe includes a vortex flow chamber, a cold end pipe section and a hot end pipe section. Compressed airflow flows through the jet pipe to form spiral airflow and flow into the vortex flow chamber in a tangential direction thereof. A valve having a cone-shaped surface is arranged inside the hot end pipe section, central airflow of the spiral airflow passes by the cone-shaped surface of the valve and flows back, and is cooled to become cold airflow, and then flows out from the cold end pipe section, to serve as cooling and drying airflow of the input electromagnetic device.

A charging apparatus for inductive charging. The charging apparatus comprises one or more charging coils configured to transfer power to a mobile apparatus and at least one flexible diaphragm configured so that movement of the flexible diaphragm directs air flow towards the mobile apparatus. At least one of, the one or more charging coils or actuating circuitry for actuating the one or more charging coils are mounted on the flexible diaphragm

An air-cooled subsurface vault houses a wireless power transfer charger for charging electric vehicles. The vault includes a cavity that receives the wireless power transfer charger and includes an air space around the wireless power transfer charger. At least two grates are positioned on respective sides of the wireless power transfer charger to enable bi-directional air-flow between the surface and the air space around the wireless power transfer charger. A temperature control element is further provided to regulate a temperature within the cavity and the at least two grates. The temperature control element may further include a heat exchanger positioned within the air space of the vault. Each grate is further adapted to act as an inlet or an outlet for the heat exchanger. A controller may be used to control operation of the heat exchanger to control venting duration and a direction of air flow in the cavity.

A transformer includes an insulation member, a high voltage part, and a low voltage part, the insulation member includes a first insulator, a second insulator, and a reference plane, the high voltage part is disposed on a first side of the reference plane, the low voltage part is disposed on a second side of the reference plane, the first insulator is disposed on the reference plane, at least a portion of the second insulator is located around the high voltage part, at least one air passage is formed by the insulation member, and at least a portion of the air passage is located within a height of the high voltage part in a normal direction of the reference plane.

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 transformer bobbin includes a first bobbin member including a first end defining a first opening, a second end defining a second opening, an inner surface defining the first opening and an outer surface. The inner surface includes a first plurality of fins that extend between the first end and the second end. A second bobbin member is disposed about and spaced from the first bobbin member. The second bobbin member includes a first end portion defining a first opening portion, a second end portion, an inner surface portion and an outer surface portion. One of the outer surface of the first bobbin member and the outer surface portion of the second bobbin member includes a second plurality of fins that extend between the first end portion and the second end portion.

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.

An inductor having a coaxial structure is described. In one example, the structure of the single-turn inductor can include a conductor, an insulation layer, a shielding layer, and a magnetic core. An air duct can be located between the shielding layer and the magnetic core. The shielding layer and the magnetic core can both be connected to a ground. In one example, the single-turn inductor can include a single-layer termination structure formed on terminations of the shielding layer. In another example, the single-turn inductor can include a double-layer termination structure formed on terminations of the shielding layer. Displacement current in the single-turn inductor can be reduced using, for example, lumped equivalent circuit models, a semi-conductive shielding layer model, or a resistive layer and conductive shielding layer model.