An air-cooled dry-type transformer includes: a core provided with a branch; a winding body arranged about the branch; a cooling channel extending in a direction of a longitudinal axis of the winding body, the cooling channel being arranged between an inner part of the winding body and an outer part of the winding body, the cooling channel having openings at both ends and a substantially ring-shaped cross section with a round, oval, or polygonal basic shape; and at least one ring ventilator comprising a ring and a blower. The blower suctions air and blows the air from the ring along a longitudinal axis of the ring, thereby generating an air flow. The at least one ring ventilator is dimensioned and mounted such that the air flow generates a cool air flow in the cooling channel.

A filter with three phases comprising for each phase an input terminal, an output terminal and a capacitor, wherein for each of the three phases the input terminal is electrically connected via a connection point to the output terminal, wherein the connection points of the three phases are electrically connected via the three capacitors in star and/or delta form, wherein the filter comprises a housing containing two coil blocks, wherein the housing comprises a first side and a second side opposite the first side, wherein the two coil blocks are arranged along a line between the first side and the second side, wherein a fan for cooling the two coil blocks is arranged on the first side of the housing, wherein the larger of the two coil blocks is arranged between the fan and the smaller of the two coil blocks.

The first wall has a first inbound cavity for receiving a coolant from an inlet port. The first wall has a first outbound cavity for directing the coolant from the inbound cavity to the input of the transition passage. The second wall has a second inbound cavity for receiving a coolant from the output of the transition passage. The second wall has a second outbound cavity for directing the coolant from the inbound cavity to the outlet port. The transition passage comprises a transverse hollow volume for interconnecting the first outbound cavity of the first wall to the second inbound cavity of a second wall. At least one heat-generating component (e.g., inductor) in the interior of the housing generates heat that is dissipated.

The invention comprises a method for assembling an inductor, including the steps of: providing a multiple sided inductor core comprising a central opening therethrough; inserting turn insert sections into the central opening; aligning the turn insert sections with a winding alignment guide, the winding alignment guide comprising a set of guide wings and a set of guide gaps between elements of the set of guide wings; placing turn wrapping sections within the guide gaps; and fastening the turn insert sections to the turn wrapping sections.

In various embodiments, an inductor thermal management system includes an inductor, and a heat sink. The heat sink includes a cavity and a spacer adapted to situate the inductor within the cavity and separate the inductor from at least one wall of the cavity such that heat is transferred from the inductor into the heat sink multi-directionally.

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 transformer station, in particular, an offshore transformer station including at least one transformer and at least one transformer cooling unit arranged on at least one side wall of the transformer station or a roof of the transformer station and configured to cool the at least one transformer. The transformer station also includes at least one air deflecting unit arranged on at least one roof edge of the transformer station and/or at least one air deflecting unit arranged on at least one side edge of the transformer station. The air deflecting unit is arranged such that an air movement is deflectable in the direction of the transformer cooling unit.

The present invention provides a bobbin-shaped air-cooled common mode choke coil that can suppress heat generation. The air-cooled common mode choke coil 10 according to the present invention is a common mode choke coil 10 in which an annular core 30 is housed in an annular bobbin 20, and a coil 40 is wound around the outer circumference of the bobbin 20. An airflow path A that allows an airflow B to flow therethrough is formed between the bobbin 20 and the core 30. The bobbin 20 includes one or more openings 21 and 22 that are in communication with the airflow path A. Flanges 23 and 24 are provided protruding along the peripheral edges of each of the openings 21 and 22. The openings 21 and 22 are desirably formed in the outer circumferential surface of the bobbin 20 and reache the upper and lower surfaces of the bobbin 20.

A system may include at least one stationary inductive charging device for inductively charging a motor vehicle and at least one compressor. The charging device may include a base plate, a cover, an interior volume defined between the base plate and the cover, a coil, a magnetic flux guiding unit, an intermediate wall, an inlet, and an outlet. The intermediate wall may divide the interior volume into a distribution chamber and a receiving chamber. The coil and the magnetic flux guiding unit may be arranged in the receiving chamber. The inlet may be arranged on a pressure side of the compressor such that compressed gas flows into the distribution chamber via the inlet. The intermediate wall may define at least one passage fluidically connecting the distribution chamber and the receiving chamber such that gas flows into the receiving chamber via the passage with reduced pressure.

An air core type reactor unit, includes a first insulating plate which is provided with a first insulating spacer on one side, a first ferromagnetic member metal plate fixed to an insulating plate, two or more air core coils each having an air core part and formed of coil layers with the separation of an air gap, a second insulating plate, which is provided with a second insulating spacer on another side thereof and has a width smaller than an inside diameter of the coil, to incorporate more air into, a second ferromagnetic member metal plate fixed to an insulating plate, and an insulating stick passing through the air core part of the air core coils, wherein the air core coils are arranged in parallel, and held and fixed between the first insulating plate and the second insulating plate through the first insulating spacer and the second insulating spacer.