Abstract: Provided is a reactor including a core; and a case housing the coil and the core, the core including an inner core portion arranged inside the coil and an outer core portion partly or entirely covering the outside of the coil, the outer core portion being formed of a mixture of a magnetic material and a resin. The coil is arranged such that the axial direction of the coil is substantially parallel to a bottom surface of the case. The difference in concentration of the magnetic material in the outer core portion in the axial direction of the coil is smaller than the difference in concentration of the magnetic material in the outer core portion in a direction along a side wall of the case. With the reactor, even if the outer core portion covering the outside of the coil is formed of the mixture of the magnetic material and the resin, a desirable inductance value can be easily achieved and the reactor can have good heat radiation performance.

Abstract: A reactor 1A of the present invention includes a sleeve-like coil 2, a magnetic core 3 that is disposed inside and outside the coil 2 to form a closed magnetic path, and a case 4A that stores the coil 2 and the magnetic core 3. At least part of the magnetic core 3 (herein an outer core portion 32 provided on the outer circumference side of the coil 2) is formed by a composite material that contains magnetic substance powder and resin. At least part of the outer circumference of the coil 2 is covered by a resin mold portion 21 that is formed by an insulating resin, whereby the shape of the coil 2 is retained. A heat dissipating pedestal portion 5A that forms at least part of the case 4A and that is formed by a non-magnetic metal material is integrally retained with the coil 2 by the resin forming the resin mold portion 21.

Abstract: A high-voltage transformer module includes a transformer core including at least one winding, and a mechanical supporting structure having the transformer core integrated permanently therein. The mechanical supporting structure has corner points arranged in the form of a right-parallelepiped. The corner points are in the form of load transfer points and are arranged corresponding to the dimensions of a CSC (International Convention for Safe Containers) container.

Abstract: Provided is a reactor which uses a reactor core in which J-shaped iron cores are oppositely disposed in a ring shape. In the ring shape, an axial outer circumferential part of a first coil wound around a first gap and an axial outer circumferential part of a second coil wound around a second gap overlap each other in an axial direction. Regarding four holding stay parts disposed at four corners of the reactor, the rigidity of the holding stay parts close to the first gap and the second gap is lower than the rigidity of the holding stay parts far from the first gap and the second gap.

Abstract: A power component device includes a heat sink having a recess with a base surface and a first side surface. The first side surface of the recess is at a generally acute angle relative to the base surface. The power component device includes a first passive electrical component with a support element, having a first side surface which faces the first side surface of the recess, and is at generally the same angle relative to the base surface as the first side surface of the recess is relative to the base surface. A pressure transmission element has a first side surface which is averted from the first side surface of the support element. The base surface is at a generally acute angle relative to the first pressure transmission element side surface. A pressure generating apparatus presses the support element against the first side surface of the recess.

Abstract: An electrical coil assembly includes a first housing and a second housing that surroundingly encloses the first housing. The coil assembly includes a ferrite layer and a thermally-conductive silicone layer that overlies the ferrite layer. A wire conductor surrounds the first housing. A structure is received in an opening defined in the first housing to be in thermal communication with the thermally-conductive silicone layer. Another thermally-conductive silicone layer overlies the first housing and the structure so that the structure is also in thermal communication therewith. A metal layer further overlies the thermally-conductive silicone layer that overlies the first housing. The second housing includes a non-dielectric cover and a dielectric cavity portion that receives the first housing. The coil assembly is associated with an electrical charging system that electrically charges an energy storage device disposed on a motorized vehicle.

Abstract: A reactor having a good heat dissipation effect is provided. The reactor includes one coil formed by winding a wire, a magnetic core arranged inside and outside the coil and forming a closed magnetic circuit, and a case for housing an assembly of the coil and the magnetic core. An end surface of the coil has a race track shape, and the coil is housed in the case such that the axial direction of the coil is parallel to an outer bottom surface of the case. A part of an outer peripheral surface of the coil is covered with the magnetic core (outer core portion), and a remaining part thereof not covered with the magnetic core is contacted with an inner bottom surface of the case. Since a part (mainly a linear portion) of the outer peripheral surface of the coil is directly contacted with the inner bottom surface of the case, heat of the coil can be directly dissipated such that the heat is released through the case to an installation target, e.g., a water cooling base, on which the case is installed.

Abstract: A reactor includes a coil formed by winding a wire, and a magnetic core in which a closed magnetic path is formed by both an inner core portion inserted in the coil and an outer core portion covering outer peripheral surfaces of the inner core portion and the coil. The outer core portion is formed of a mixture containing a magnetic material and resin. One of the coil and the inner core portion has an exposed portion where a part of the outer peripheral surface is not covered with the outer core portion, and at least a part of the exposed portion is in contact with a heat dissipation layer provided in a heat dissipation plate.

Abstract: A vehicle is provided with a transmission having a chamber with fluid therein. The vehicle includes a core and a conductor that are mounted within the chamber. The core includes a pair of elements that are oriented toward each other along a longitudinal axis. Each element includes a base with a post and at least two projections extending longitudinally from the base. The conductor is disposed over the posts and is configured to receive the fluid through an opening formed between adjacent projections.

Abstract: A magnetic core includes a first core having a recess and a second core, which has a first end portion and a second end portion both held in contact with the first core and forms a closed magnetic path with the first core. The second core is formed of material having a lower magnetic permeability and a higher saturation magnetic flux density than those of the first core. The second end portion includes a distal surface having an area larger than the cross-sectional area of the first end portion in a direction perpendicular to the direction in which a magnetic flux flows in the closed magnetic path. The distal surface of the second end portion is held in contact with the first core and the first end portion is engaged with the recess in the first core.

Abstract: A curable epoxy resin formulation composition useful as insulation for an electrical apparatus including (a) at least one liquid epoxy resin; (b) at least one liquid cyclic anhydride hardener; (c) at least one thermally conducting and electrically insulating filler, wherein the filler includes an epoxy-silane treated filler; and (d) at least one cure catalyst with no amine hydrogens; wherein the epoxy resin formulation composition upon curing provides a cured product with a requisite balance of electrical, mechanical, and thermal properties such as Tg, tensile strength, dielectric strength, and volume resistivity such that the cured product can be used in applications operated at a temperature of greater than or equal to 120° C.

Abstract: A system comprises a tank, a radiator connected to the tank, and a component situated within the tank and susceptible to creating increasing pressure within system when under a fault condition. The radiator is configured to directionally vent pressure under excessive pressure conditions.

Abstract: A reactor including an assembly of a coil, a magnetic core on which the coil is disposed, and a case that houses the assembly. The case includes an installation face, a side wall that is removably attached to the installation face and surrounds the periphery of the assembly, and a heat dissipation layer formed on the inner face of the installation face and interposed between the installation face and the installation-side face of the coil. The installation face consists of aluminum, the side wall consists of an insulating resin, and the heat dissipation layer consists of an adhesive with high thermal conductivity and excellent insulation. The installation face is separate from the side wall, making it easy to form the heat dissipation layer, and having excellent heat dissipation. The side wall consists of an insulating resin, thus reducing the gap between it and the coil.

Abstract: A rupture resistant system comprises a tank comprising a top member, a sidewall member, and a bottom member, and a component situated within the tank and susceptible to creating increasing pressure within the tank when under a fault condition. At least one of the top, sidewall, and bottom members is connected to another of the top, sidewall, and bottom members in a manner so as to cause an increase in inner volume of the tank under increased pressure conditions.

Abstract: A high power inductance device enables a large ferrite magnetic core to be manufactured at low cost and with ease and improves heat radiation efficiency to reduce an increase in the temperature of the core. The inductance device has a ferrite magnetic core and a winding wire wound around the ferrite magnetic core and is mounted on a heat radiation structure through at least one of the front surfaces of the ferrite magnetic core. The ferrite magnetic core is made of a core aggregate obtained by arranging side by side a plurality of ferrite cores 10 having a completely-closed magnetic path structure or a quasi-closed magnetic path structure with a magnetic gap such that an interval is placed between the ferrite cores and magnetic paths are parallel to each other.

Abstract: An electrical inductor assembly includes an inductor core having a relatively circular geometry. Also included is a wire guide surrounding and retaining the inductor core, the wire guide having a plurality of slots for retaining and guiding a plurality of wires. Further included is an outer housing surrounding and retaining the wire guide and a substance disposed within at least one of the plurality of slots of the wire guide.

Abstract: An immersion cooled inductor includes an inductor at least partially submerged in cooling liquid and a localized boiling feature operable to instigate boiling of the cooling liquid prior to oversaturation.

Abstract: A magnetic core extends in a longitudinal direction and contains at least one stacking of sheets consisting of magnetic material and stacked in a direction of stacking perpendicular to the longitudinal direction, at least one plate of heat-conducting material, presenting first and second opposing faces, and at least one cooling tube positioned in contact with the said first face of the plate in which a heat-bearing fluid is designed to circulate. The plate extends in a plane parallel to the longitudinal direction and to the direction of stacking, its second face being positioned in thermal contact with the sheets in the stacking.

Abstract: A transformer system includes a cabinet and at least one toroidal transformer with each toroidal transformer being supported in a cradle. Each cradle is mounted in the cabinet and supports its toroidal transformer in a vertical or horizontal orientation such that a central air-filled region thereof is arranged in a substantially horizontal or vertical orientation, respectively. The cradle supports active and passive cooling arrangements for the toroidal transformer, while also providing modular attributes for the transformer system.

Abstract: The present invention relates to a dry distribution transformer (1) comprising at least one low-voltage winding (2) and one high-voltage winding (3), concentrically mounted around a core column (1.1, 1.3). The transformer (1) comprises at least one cooling circuit (7) associated to at least one low-voltage winding (2) and/or one high-voltage winding (3). Such a cooling circuit (7) is electrically insulated with respect to the low-voltage and high-voltage windings (2, 3). In addition, the cooling circuit (7) is capable of enabling circulation of a cooling fluid inside it. Additionally, the cooling circuit (7) is provided with a constructive arrangement configured to involve partly the core column (1.2, 1.3), that is, the constructive arrangement is configured not to form a turn around the core column (1.1, 1.3). The cooling circuit (7) is provided with cooling ducts (6), each cooling duct (6) having a cross section that partly involves a cross section of the core column (1.2, 1.3).

Abstract: The invention comprises an electrical apparatus and method of manufacture. The apparatus includes a substantially annular inductor comprising an inductor core composed of at least a distributed gap material. The distributed gap material includes particles of alternating layers of magnetic and non-magnetic materials separated by a gap material. The particles comprise an average layer thickness of less than about one hundred micrometers, where a majority of said layered particles comprise an average cross sectional size of less than about one millimeter. The inductor is cooled using at least one of: a thermally conductive potting material, a liquid coolant in direct contact with the inductor, a cooling line through the potting material or liquid coolant, and a chill coil in a container about the potting material and/or the liquid coolant.

Abstract: An electrical transformer is disclosed which includes an enclosure; a magnetic core assembly arranged within the enclosure, the magnetic core assembly having a first core limb, a second core limb and a third core limb; and three coil assemblies having a first coil assembly, a second coil assembly, and a third coil assembly. At least two diaphragms are arranged within the enclosure, the diaphragms being essentially sealed to a first outermost coil of the first coil assembly, and arranged for guiding a cooling fluid in series through a first inner fluid duct, a second inner fluid duct, a third inner fluid duct and an extra-coil volume along outsides of third, second and first outermost coil coils of the third, second and first coil assemblies.

Abstract: A converter including a reactor as one of a component for the converter, the reactor comprising: a coil; a core having an inner core portion arranged inside the coil and an outer core portion covering the outside of the coil; and a case housing the coil and the core, wherein the case has a heat-radiation structure at an inner wall surface, the heat-radiation structure being provided for at least one of the coil and the inner core portion, wherein the heat-radiation structure is non-similar to an outer wall surface of the case, and is formed of the inner wall surface that is formed to correspond to an external shape of the at least one of the coil and the inner core portion.

Abstract: A magnetic device includes a thermally-conductive bobbin and a winding coil. The thermally-conductive bobbin has a winding section. The winding coil is wound around the winding section. The heat generated from the winding coil is dissipated away through the thermally-conductive bobbin.

Abstract: A transformer containing an electrical active part arranged in an insulating space and including primary and secondary winding wound around a magnetic core. and radially spaced apart from each other by a winding space having an insulation fluid. A block defines a compartment closed and separated from a remaining insulating space, the compartment being at least partially arranged within the winding space. The compartment contains an insulation fluid different from insulation fluid in the remaining insulating space, and having a higher dielectric breakdown field strength than the insulation fluid in the remaining insulating space.

Abstract: An electromagnetic device arrangement includes a transformer assembly having a core, windings, and a housing disposed around at least a portion of the core and windings. An enclosure at least partially encloses the transformer assembly. The transformer assembly is mounted to a first portion of the enclosure such that heat is transferred from the transformer assembly to the first portion of the enclosure. A second portion of the enclosure has an extension extending therefrom such that the extension is placed in thermal contact with the transformer assembly to transfer heat from the transformer assembly to the extension.

Abstract: In a stationary induction apparatus, an inter-partial-coil insulating plate and a plurality of inter-partial-coil spacer insulators form a refrigerant flow path in conjunction with each other. A space having an inter-partial-coil insulation dimension for withstanding an abnormal voltage is formed between a pair of partial coils. The inter-partial-coil insulating plate and the inter-partial-coil spacer insulators support both the pair of partial coils at an insulated state so as to maintain the inter-partial-coil insulation dimension. The insulators are arranged so as to be overlapped with each other in the direction in which mutually adjacent partial coils are opposed to each other.

Abstract: An electrical apparatus includes a magnetic core, and a bobbin extending about and partially covering the magnetic core. The bobbin is formed from a thermally conductive material. An electrical conductor forms a winding that wraps about the bobbin.

Abstract: Disclosed herein is a transformer having a heat radiation function. The transformer includes a pair of cores having an E-shape and facing and contacting each other to form central pillars and outer peripheral parts, a transforming coil part wound on the central pillars of the pair of cores and dropping voltage, and a heat radiation pipe formed to have a cylindrical shape and positioned inward from the transforming coil part to radiate heat generated from the transforming coil part, thereby well discharging heat generated from the coil.

Abstract: A small reactor with high heat-release performance is provided. A reactor 1 includes an assembly (10) and a case (4), the assembly (10) having a coil (2) and a magnetic core (3) at which the coil (2) is arranged, the case (4) housing the assembly (10). The case (4) includes a bottom plate (40) that contacts a fixing object when the reactor (1) is installed on the fixing object, a side wall (41) that is mounted on the bottom plate (40) with an adhesive and surrounds the assembly (10), and a junction layer (42) that fixes the coil (2) to an inner surface of the bottom plate (40). The bottom plate (40) is formed of a material with higher thermal conductivity than that of the side wall (41). The reactor (1) easily transfers heat of the coil (2) to the bottom plate (40) and hence has high heat-release performance because the reactor (1) includes the bottom plate (40) with the high thermal conductivity and the coil (2) is joined to the bottom plate (40) through the junction layer (42).

Abstract: A coil apparatus includes a first housing and a second housing that surroundingly encloses the first housing. The first housing has a coil arrangement disposed therein. The coil arrangement includes a ferrite layer and a thermally-conductive silicone layer that overlies the ferrite layer. A wire conductor surrounds the first housing. A structure is received in a opening defined in the first housing to be in thermal communication with the thermally-conductive silicone layer. Another thermally-conductive silicone layer overlies the first housing and the structure so that the structure is also in thermal communication therewith. A metal layer further overlies the thermally-conductive silicone layer that overlies the first housing. The second housing includes a non-dielectric cover and a dielectric cavity portion that receives the coil arrangement. The coil apparatus is associated with an electrical charging system (ECS) that electrically charges an energy storage device (ESD) disposed on a motorized vehicle.

Abstract: A liquid-cooled electromagnetic component (reactor, transformer) including a plurality of disc-shaped coils with one or more turns and a flat radiator located between them, wherein at least two disc coils are assigned to a flat radiator, and in which all the turns (turns of the coil) are in direct thermal contact with a surface of the flat radiator. This component is used in power converter installations and in midfrequency installations.

Abstract: An air cooling system, method, apparatus and kit applied to lower transformer operating temperatures, such as governed by a tank or container of oil, allowing transformer components to run more efficiently at a lower temperature level, e.g., down from the hot level operating temperatures typical in stressed conventional devices. By lowering the operational levels to within or below the nominal operational temperature ranges for the equipment, and recovering heat generated during operation, several advantages are obtained.

Abstract: In a stationary induction apparatus, an inter-partial-coil insulating plate and a plurality of inter-partial-coil spacer insulators form a refrigerant flow path in conjunction with each other. A space having an inter-partial-coil insulation dimension for withstanding an abnormal voltage is formed between a pair of partial coils. The inter-partial-coil insulating plate and the inter-partial-coil spacer insulators support both the pair of partial coils at an insulated state so as to maintain the inter-partial-coil insulation dimension. The insulators are arranged so as to be overlapped with each other in the direction in which mutually adjacent partial coils are opposed to each other.

Abstract: A pumped loop cooling system is provided to cool a hollow winding of a transformer utilizing a two phase vaporizable dielectric refrigerant. A liquid refrigerant pump circulates the refrigerant into a transformer and through a copper tube winding of the transformer where the refrigerant at least partially vaporizes in removing heat from the transformer. The refrigerant is then circulated to a condenser and then back to the pump.

Abstract: A reactor includes a cooling block; a heat radiation base affixed to the cooling block; a reactor core that includes a coil, and that is affixed to the heat radiation base; and a resin molded body formed on the heat radiation base to cover the reactor core. The heat radiation base is formed of a metal or an alloy that has a predetermined logarithmic decrement and predetermined heat conductivity. The predetermined logarithmic decrement is equal to or higher than 0.1, and the predetermined heat conductivity is equal to or higher than 10 W/mK.

Abstract: An electro-magnetic device includes a core having a first end that extends to a second end through an outer core surface and an inner core surface. A plurality of windings extend about the core, and a polymer housing covers the core and the plurality of windings. The polymer housing includes an outer housing member that extends adjacent to the outer core surface and an inner housing member that extends adjacent to the inner core surface.

Abstract: A reactor including an assembly of a coil, a magnetic core on which the coil is disposed, and a case that houses the assembly. The case includes an installation face, a side wall that is removably attached to the installation face and surrounds the periphery of the assembly, and a heat dissipation layer formed on the inner face of the installation face and interposed between the installation face and the installation-side face of the coil. The installation face consists of aluminum, the side wall consists of an insulating resin, and the heat dissipation layer consists of an adhesive with high thermal conductivity and excellent insulation. The installation face is separate from the side wall, making it easy to form the heat dissipation layer, and having excellent heat dissipation. The side wall consists of an insulating resin, thus reducing the gap between it and the coil.

Abstract: In a heat dissipation device provided with a heat dissipation section that dissipates heat emitted from a transformer provided on a power-source board, the transformer is provided on an edge portion of the power-source board, and a heat conductor is inserted between the heat dissipation section and the transformer. Since the transformer is provided on the edge portion of the power-source board, the heat dissipation section and the transformer are located closer to each other.

Abstract: A transformer including: a transformer housing having an interior, a superconducting wire winding disposed within the housing interior, a dry dielectric medium in contact with a superconducting wire winding, and a temperature control device in heat exchange communication with the dry dielectric medium, adapted to utilize a gaseous medium for controlling the temperature of the superconducting wire winding.

Abstract: Provided is a reactor including a core; and a case housing the coil and the core, the core including an inner core portion arranged inside the coil and an outer core portion partly or entirely covering the outside of the coil, the outer core portion being formed of a mixture of a magnetic material and a resin. The coil is arranged such that the axial direction of the coil is substantially parallel to a bottom surface of the case. The difference in concentration of the magnetic material in the outer core portion in the axial direction of the coil is smaller than the difference in concentration of the magnetic material in the outer core portion in a direction along a side wall of the case. With the reactor, even if the outer core portion covering the outside of the coil is formed of the mixture of the magnetic material and the resin, a desirable inductance value can be easily achieved and the reactor can have good heat radiation performance.

Abstract: Provided is a reactor including a coil, and a core having an inner core portion arranged inside the coil and an outer core portion covering the outside of the coil. The inner core portion of the reactor has a higher saturation magnetic flux density than that of the outer core portion. The outer core portion has a lower permeability than that of the inner core portion, and is made of a mixture of a magnetic material and a resin. The case has a heat-transfer portion at an inner wall surface, as a heat-radiation structure for at least one of the coil and the inner core portion. With the reactor, even if the outside of the coil is covered with a core member, heat generated in the reactor can be effectively dissipated.

Abstract: An electrical transformer is disclosed which includes an enclosure; a magnetic core assembly arranged within the enclosure, the magnetic core assembly having a first core limb, a second core limb and a third core limb; and three coil assemblies having a first coil assembly, a second coil assembly, and a third coil assembly. At least two diaphragms are arranged within the enclosure, the diaphragms being essentially sealed to a first outermost coil of the first coil assembly, and arranged for guiding a cooling fluid in series through a first inner fluid duct, a second inner fluid duct, a third inner fluid duct and an extra-coil volume along outsides of third, second and first outermost coil coils of the third, second and first coil assemblies.

Abstract: Unique methods are described to construct an inductor in the form of a tray. The basic inductor consists of a ferromagnetic core with a cavity and a completely or partially embedded winding structure. Components of a power conversion system or sub-system are mounted inside this tray structure. The terminals of the winding structure serve as mounting surfaces for components of a power conversion or other type of electronic system or sub-system. The single winding inductor is also extended to multi-winding inductors. The winding terminations are shaped to form Kelvin connections for current sensing. Flanges are added to the winding structure forming an integrated heat sink.

Abstract: A method for cooling a transformer and transformer apparatuses are implemented. A transformer apparatus, according to one embodiment, comprises: a conduction cooled electrical transformer (240) mounted to a cold plate (252); and a heat pipe (262) for supplementing cooling of the transformer (240), the heat pipe (262) comprising a first end (303), a second end (305), and a sealed low pressure cavity containing an amount of a fluid (311), wherein the first end (303) of the heat pipe (262) is located in a hot region of the transformer (240), the second end (305) is maintained colder than the first end (303) by contact with the cold plate (252), and heat produced at the first end (303) by operation of the transformer (240) is moved to the second end (305) by a closed loop vapor cycle in the sealed low pressure cavity using the fluid (311) of the heat pipe (262).

Abstract: A power transformer apparatus and method of assembling are provided. In one aspect, a method of assembling a transformer is provided. The method includes providing a heat sink including a plurality of exterior ribs, wherein the heat sink forms a bottom wall of an enclosure. The method also includes coupling at least one diaphragm to the heat sink such that a bottom surface of the diaphragm is in contact with the heat sink, coupling at least one winding to the at least one diaphragm, and coupling a terminal board to the heat sink such that a plurality of spacers are positioned between the terminal board and the heat sink.

Abstract: Apparatus and method are provided for induction heating of one or more components of a complex-shaped workpiece. The component is positioned within an opening formed by opposing pairs of arcuate coil structures formed in opposing inductor segments. One inductor segment is formed from electrically isolated inner and outer active inductor segments connected to one or more power supplies, while the other inductor segment is formed from electrically isolated inner and outer passive inductor segments that are magnetically coupled with respective inner and outer active inductor segments. Changing the output electrical parameters of the one or more power supplies controls the induction hardening along the transverse width of the workpiece with optional flux concentrators between opposing pairs of arcuate coil structures.

Abstract: A high power inductance device enables a large ferrite magnetic core to be manufactured at low cost and with ease and improves heat radiation efficiency to reduce an increase in the temperature of the core. The inductance device has a ferrite magnetic core and a winding wire wound around the ferrite magnetic core and is mounted on a heat radiation structure through at least one of the front surfaces of the ferrite magnetic core. The ferrite magnetic core is made of a core aggregate obtained by arranging side by side a plurality of ferrite cores 10 having a completely-closed magnetic path structure or a quasi-closed magnetic path structure with a magnetic gap such that an interval is placed between the ferrite cores and magnetic paths are parallel to each other.

Abstract: The object of the invention is a liquid cooling arrangement of an inductive component and a method for manufacturing the inductive component. The inductive component comprises at least a core (1) assembled from separate structural elements (7, 7a, 7b) as well as liquid cooling ducts (8a) integrated into the core (1) for the purpose of liquid cooling and a winding structure (3) around the core (1). The core (1) is assembled from subassemblies formed from structural elements (7, 7a, 7b), which subassemblies are separately composed of e.g. vertical pillars (35), a top horizontal beam (36) and a bottom horizontal beam (37), and cooling liquid ducts (8a) or cooling liquid pipes (10) are placed in at least a part of the subassemblies before final assembly of the core (1).

Abstract: The disclosure relates to an amorphous transformer core including at least one transformer core disc with a plurality of layers of strip-like amorphous core material arranged concentrically around at least one winding window. At least one heat dissipating plate extends into an interior of the amorphous transformer core and is fed from there into at least one heat exchange region outside the amorphous transformer core. This can enhance dissipation of heat energy which is produced inside the amorphous transformer core.