An inductor for a converter of an electric machine includes a core defining a channel configured to receive transmission fluid on an outer surface of the core. Coils made of windings are wrapped on the core. The windings enclose an open side of the channel to define an oil flow passage, wherein oil flowing through the oil flow passage is in direct contact with both the windings and the core to absorb heat from the windings and the core.

An insulation system for an electrical power transformer that includes at least a non-cellulose based axial spacer. The axial spacer may include a pair of spacer arms that extend from a base wall of the axial spacer. Additionally, the spacer arms and the base wall may generally define a hollow inner region of the axial spacer, thereby reducing the volume of the axial spacer. According to certain embodiments, the spacer may include lips that are adapted to lockingly engage a radial spacer. Additionally, at least a portion of the axial spacer and the radial spacer may be constructed from a thermoplastic and/or a thermoset plastic. Further, according to certain embodiments, another portion of the axial spacer, such as, for example, the lips, may be formed from a flexible thermoplastic elastomer or a thermoset elastomer so as to provide the axial spacer with a combination of both flexibility and stiffness.

A method produces a coil sheet from an initial coil sheet in which a conductor layer, a thermally resistant insulating layer, a thermosetting, uncured adhesive layer, and a base layer are stacked in this order. The method includes a first cutting step of cutting the conductor layer into a predetermined shape through etching, and a second cutting step of cutting, after the first cutting step, the insulating layer and the adhesive layer into the predetermined shape through etching.

A coil component includes a wire including a linear central conductor and an insulating coating layer that covers a circumferential surface of the central conductor, and a terminal electrode that is electrically connected to the central conductor at an end portion of the wire. The terminal electrode includes a receiving portion to which the central conductor is welded. A weld nugget portion that is produced when the central conductor is welded and the receiving portion are welded to each other.

A wound strip structure for efficient heat transfer. The structure includes one or more edge-wound or face-wound strips. At least one of the strips has a plurality of turns and a plurality of apertures, and an aperture of a turn of the strip overlapping an aperture of an adjacent turn, of the strip or of another strip, to form a portion of a fluid channel. The fluid channel may be used to conduct a cooling fluid to cool the structure.

A superconducting magnet system is provided. The superconducting magnet system includes a coil former, superconducting coils supported by the coil former, and one or more cooling assemblies. The cooling assemblies are in thermal contact with the coil former and include one or more cooling tubes for receiving a cryogen passed therethrough. The cooling assemblies are detachably mounted on the coil former and form at least one cooling circuit therein. The cooling assemblies include one or more flat surfaces attached on a surface of the coil former. A method of manufacturing the same is also provided.

A stationary induction electric apparatus includes an iron core having legs of core and yokes of core; windings wound around the legs of core; coolant for cooling the windings; a cylindrical insulation structure that forms a flow of the coolant around the windings; baffle members alternately provided on the inner wall side and the outer wall side of the cylindrical insulation structure; and adjustment members for constricting the flow of the coolant. The adjustment members are provided on the same side of the respective baffle members and on the respective baffle members.

An electrically insulating inorganic sheet including at least 90% by weight inorganic particles, and a binder which binds the particles together to form the sheet, for use as solid insulation in an electrical device, e.g. a power transformer.

In one example, the static electric induction device includes: a heat-generating component which is subject to electric induction, and a duct system configured to lead a coolant along the heat-generating component, wherein the duct system includes a plurality of cross channels and at least two longitudinal channels, each one of the longitudinal channels is assigned to at least some of the cross channels and the assigned cross channels connect the respective longitudinal channels with each other, and the duct system further includes at least one flow obstruction located in at least one of the longitudinal channels, the flow obstruction is configured to allow flow of the coolant through it and locally narrows a cross-section of the respective longitudinal channel by at least 75%.

A winding body (1310) for a high-voltage winding (130) includes: a plurality of winding plates (1313), each of the winding plates (1313) being provided with a plurality of winding grooves (1314) to form a plurality of comb teeth on the winding plate (1313); and at least one auxiliary member (5316), the auxiliary member (5316) being ring-shaped, the winding plates (1313) being arranged along a circumferential direction of the auxiliary member (5316), and the auxiliary member (5316) being fixedly connected to the winding plates (1313). A high-voltage winding (130) includes: the foregoing winding body (1310); a high-voltage coil (1320); and a high-voltage insulating layer (1330). A dry-type transformer (10) includes a core (110), a low-voltage winding (120), and the foregoing high-voltage winding (130). The low-voltage winding (120) is sleeved outside the core (110), and the high-voltage winding (130) is sleeved outside the low-voltage winding (120).