Abstract: To improve the cooling efficiency of a transformer operated in a wind power station, according to the present invention there is provided a cooling system. The cooling system comprises a transformer guard housing (10) having a first opening (12) for supply of a transformer cooling medium and having a second opening (14) for discharge of the transformer cooling medium. Further, a first channel system (20) supplies the transformer cooling medium to the transformer guard housing (10). A second channel system (22) discharges the transformer cooling medium from the transformer guard housing (10). Through the provision of the inventive cooling system, a controlled flow of cooling medium to the transformer accommodated in the transformer guard housing (10) increases operative efficiency of the installation.

Abstract: In one embodiment, a transformer is provided for coupling between a utility connection and a plurality of power cells of a drive system. The transformer may be of a horizontal arrangement and include a housing and a core configured within the housing and having multiple columns each adapted along a horizontal axis. Each column corresponds to a phase, and each phase includes a coil having primary winding and multiple secondary windings concentrically adapted about the column horizontal axis to provide an air gap between adjacent ones of the primary and secondary windings. In addition, the transformer may include a baffler adapted about the core and configured within the housing to prevent air flow at a periphery of the coils and to direct air flow through the air gaps of the coils.

Abstract: Provided is an electrical apparatus comprising a magnetic core, a conductive coil wound around at least a part of the core, a cooling element configured to receive a cooling fluid to cool the core and the coil during operation, and at least one biasing element operatively associated with the core to urge the core and the coil into engagement with the cooling element despite differential expansion or contraction of the core and the coil and manufacturing tolerances. Further provided is a method for making an electrical apparatus comprising disposing a conductive coil wound around at least a part of a magnetic core, disposing a cooling element between the core and the coil, the cooling element configured to receive a cooling fluid to cool the core and the coil during operation, and urging the core and the coil into engagement with the cooling element despite differential expansion or contraction of the core and the coil and manufacturing tolerances.

Abstract: The disclosure relates to a housing for an electric machine, for example, an electric power transformer, such as a dry-type transformer, with cooling channels being provided within the housing for a cooling medium. The electric machine and a cooling system can be arranged in the housing, with vertically arranged first and second channels for the cooling medium being provided. The medium can flow around the electric machine, with the housing accommodating the electric machine and the cooling system substantially forming a hermetic encapsulation.

Abstract: The invention relates to a winding element (200) for conducting current, forming a component of a coil winding (132, 133; 408, 409), especially of a (welding) transformer winding, comprising fixing means (205) for fixing the winding element (200) to a carrier component (402, 403, 404). The invention also relates to a transformer arrangement (100; 600), especially a welding transformer arrangement, comprising a primary winding (132; 408) and a secondary winding (133; 409), the primary winding (132; 408) and/or secondary winding (133; 409) comprising at least one winding element (200) according to the invention.

Abstract: A semiconductor module (500) for connecting to a transformer winding (132, 133; 408; 409) includes a semiconductor component (501) that is disk-shaped and disposed between two contact plates (502). One of the contact plates (502) is acted upon using a cooling fluid on its side facing away from the semiconductor component (501).

Abstract: A choke device for a frequency converter, comprising three windings composed of conductors wound around three substantially parallel axes (A, B, C), respectively, the windings being located triangularly with respect to each other in such a manner that, when the choke device is viewed in the longitudinal direction of said winding axes (A, B, C), the winding axes are located at the vertices of the triangle, the choke device further comprising an envelope (1) surrounding the windings, a first end (3A) thereof being provided with at least one opening (20) for receiving cooling medium to the inside of the envelope, and a second end (3B) being provided with at least one opening for discharging the cooling medium from the envelope, and an envelope axis (D) between said first and second ends being substantially parallel with the winding axes (A, B, C).

Abstract: A transformer having a coil which is wound with conductor material and which contains cooling channels through which a cooling fluid flows is provided. The cooling channels are formed by corrugated components, the corrugation shape of which matches the outer surface, including the outer contour in corner regions of the coil.

Abstract: Provided is an electrical apparatus comprising a magnetic core, a conductive coil wound around at least a part of the core, a cooling element configured to receive a cooling fluid to cool the core and the coil during operation, and at least one biasing element operatively associated with the core to urge the core and the coil into engagement with the cooling element despite differential expansion or contraction of the core and the coil and manufacturing tolerances. Further provided is a method for making an electrical apparatus comprising disposing a conductive coil wound around at least a part of a magnetic core, disposing a cooling element between the core and the coil, the cooling element configured to receive a cooling fluid to cool the core and the coil during operation, and urging the core and the coil into engagement with the cooling element despite differential expansion or contraction of the core and the coil and manufacturing tolerances.

Abstract: A planar transformer comprises a laminate substrate having an opening with metal traces wound thereabout forming a primary and a secondary winding, a core configured to fit inside the opening to enclose the laminate substrate. At least one heat sink fin is integrally formed with the top, bottom or both sides of the core. A method of forming a planar transformer comprises laminating a substrate having an opening with metal traces wound thereabout forming a primary and a secondary winding, fitting a core inside the opening, and enclosing the laminate substrate. One of the top, bottom or both sides of the core include one or more heat sink fins.

Abstract: A method of manufacturing a transformer that includes forming a disc-wound coil using a plurality of pre-formed cooling ducts. Each cooling duct may be supported by a support pipe secured between walls of the cooling duct, or by a removable insert. First and second conductor layers are formed, each of which include plurality of disc windings arranged in an axial direction of the disc-wound coil. A spacer layer is formed between the first and second conductor layers to form a plurality of axially-extending passages. The cooling ducts are slid into the axially-extending passages so as to be disposed between the first and second conductor layers.

Abstract: Provided is an electrical apparatus comprising a magnetic core, a conductive coil wound around at least a part of the core, a cooling element configured to receive a cooling fluid to cool the core and the coil during operation, and at least one biasing element operatively associated with the core to urge the core and the coil into engagement with the cooling element despite differential expansion or contraction of the core and the coil and manufacturing tolerances. Further provided is a method for making an electrical apparatus comprising disposing a conductive coil wound around at least a part of a magnetic core, disposing a cooling element between the core and the coil, the cooling element configured to receive a cooling fluid to cool the core and the coil during operation, and urging the core and the coil into engagement with the cooling element despite differential expansion or contraction of the core and the coil and manufacturing tolerances.

Abstract: A power inductor comprising a tube and one or more coils. The tube in one embodiment is generally cylindrical and comprises a liquid-cooled center portion, the tube further comprising an inner diameter, an outer diameter, and an outer surface. The coils of one embodiment are coupled to the tube outer surface, with each of the one or more coils having a coil thickness, and at least a portion of a coil turn.

Abstract: An electrical induction device for high voltage applications, of the type comprising a magnetic core which has at least one leg and is operatively coupled to a supporting structure, at least one inner winding which is arranged around said leg and has a first rated voltage, at least one outer winding which is arranged around said at least one inner winding and has a second rated voltage; and electrically insulating means, wherein said at least one inner winding comprises a plurality of substantially concentric turns formed by a sheet of electrically conducting material which is spirally wound, and in that said electrically insulating means comprise at least one layer of electrically insulating material which is arranged between mutually facing surfaces of said concentric turns, and first shaped insulating means which edge, at least partially, at least one of the upper and lower external rims of said inner winding.

Abstract: In a vehicle transformer including a core 1, a winding 2, a rectangular tank 3 holding them, a cooling unit 7 for cooling a cooling medium 6 filling the tank 3, and a circulating pump 8 for forcibly circulating the cooling medium 6, a partition member 9 is provided for dividing an interior of the tank 3 into two and the partition member 9 divides a channel of the cooling medium 6 flowing within the winding 2 into a first cooling medium channel 10 and a second cooling medium channel 11, and both of the cooling medium channels 10, 11 are communicated at one end side of the tank 3 and the cooling unit 7 connected to both of the cooling medium channels 10, 11 is provided at the other end for the cooling medium 6 to flow and circulate in the first cooling medium channel 10 and the second cooling medium channel 11. Thereby, the connection between the tank and the cooling unit is simplified and a vehicle transformer reduced in size and weight is obtained.

Abstract: An electromagnet and associated apparatus and method are provided. The electromagnet includes a core and at least one winding disposed circumferentially about the core such that the winding extends at least one revolution around the core. The electromagnet further includes at least one spacer having channels defined therein and disposed circumferentially about the core and adjacent to the at least one winding. The channels facilitate cooling by directing fluid about the windings of the coil as fluid is introduced into the electromagnet.

Abstract: A planar transformer comprises a primary coil board including a primary coil, a secondary coil board including a secondary coil, a heat sink integrally having a spacer portion, and a magnetic core assembly mounted to the primary coil board and the secondary coil board. The spacer portion is inserted into a gap between and facing the primary coil board and the secondary coil board and at least a surface of the heat sink is electrical insulating.

Abstract: A method of manufacturing a dry-type, resin-encapsulated transformer coil that includes forming a plurality of conductive layers and positioning a plurality of pre-formed plastic cooling ducts so as to be disposed between the conductive layers.

Abstract: An ignition coil includes a coil part having primary and secondary coils, a center core, and a peripheral core, a connector case part, a seal rubber, and a ventilation passage. The coil part is inserted in a plug hole of an engine, and the case part is outside the plug hole. An axial end of the peripheral core is inserted in an insertion hole of the case part. The peripheral core and an inner wall surface of the insertion hole define a ventilation clearance therebetween. A gap between the case part and the plug hole is sealed with the rubber. The rubber is closely-attached to the plug hole and the case part along its whole circumference. The passage, through which the plug hole is ventilated, includes the clearance and a ventilation hole formed at a certain position of the case part away from the rubber to communicate with the clearance.

Abstract: A cooled high-power vehicle inductor includes an inductor core including a central axis; a first series of inductor windings around the central axis of the cooled high-power vehicle inductor, the first series of inductor windings having an outer perimeter; a second series of inductor windings around the central axis of the cooled high-power vehicle inductor, the second series of inductor windings having an inner perimeter that is substantially outside the outer perimeter of the first series of inductor windings, wherein the second series of inductor windings is electrically coupled to the first series of inductor windings; and a first heat transfer insert that is disposed between the outer perimeter of the first series of inductor windings and the inner perimeter of the second series of inductor windings, the first heat transfer insert forming a heat transfer path.

Abstract: A device and system for removing heat from a magnetic device such as an electromagnet core section of a magnetic bearing internally by convection. The device includes a ribbon-type conductor portion and an insulator portion that are spirally and coaxially arranged on a coil. The insulating portion includes window portions that provide a fluid passage when the insulating portion is sandwiched between adjacent conductor portions. The device can be disposed in a plenum in the electromagnet core section and at least one opening in the core section, through which a cooling fluid can be introduced into the plenum, can be provided.

Abstract: The present invention relates to a choke (1) of an electrical device, comprising at least one conductor (2, 3) wound into a coil having separate turns of the conductor wound on top of one another, and a cooling element (4) for cooling the choke. In order to achieve efficient cooling without electrical properties of the choke being impaired, the cooling element (4) is arranged against the coil to cool the conductor (2, 3), wound into a coil, of the choke by means of a medium flowing in a direction parallel to the conductor (2, 3) through a cooling channel provided in the cooling element.

Abstract: Provided is an electrical apparatus comprising a magnetic core, a conductive coil wound around at least a part of the core, a cooling element configured to receive a cooling fluid to cool the core and the coil during operation, and at least one biasing element operatively associated with the core to urge the core and the coil into engagement with the cooling element despite differential expansion or contraction of the core and the coil and manufacturing tolerances. Further provided is a method for making an electrical apparatus comprising disposing a conductive coil wound around at least a part of a magnetic core, disposing a cooling element between the core and the coil, the cooling element configured to receive a cooling fluid to cool the core and the coil during operation, and urging the core and the coil into engagement with the cooling element despite differential expansion or contraction of the core and the coil and manufacturing tolerances.

Abstract: The system utilizes the flow of a medium for cooling an installation, especially a transformer. The fact is utilized that the flow of the medium, e.g. wind, automatically increases with increasing load of the transformer. The novel transformer is formed so that its outer shape and the cooling elements are impinged upon by the natural air flow to a maximum degree. For this purpose, the cooling elements across their length are adapted to have a large cross-sectional area for the flowing medium. The depth of the cooling elements is chosen such that the flow resistance is not too high and so as to achieve a turbulent flow of the cooling air. Distance and arrangement of the cooling elements are chosen such that the transformer tank itself is reached by the flowing medium and serves for cooling.

Abstract: A transformer, in particular an entirely cast resin transformer, includes at least one lower voltage winding and at least one upper voltage winding. The application of an electrical shielding around the upper voltage winding makes it possible to prevent a voltage disruptive discharge in such a way that the outer wall of the transformer can be touched by a person and also provides the transformer with electromagnetic shielding. The transformer is provided with bushings for internal electric connections and for that reason, it can be placed in media affected by dirty surroundings and in open air.

Abstract: Insulating oil in electric power generation, transmission and distribution equipment such as circuit breakers, regulators, phase shifters, tank diverter switches and capacitor banks for respectively separated phases of a plural phase transmission or distribution line is filtered for removal of accumulated water, carbon particles and other contaminants by filters in oil circuits respective to each phase in the plurality. Each oil circuit respective to each circuit breaker includes a respective filter and circulation pump. However, all pumps in the plural phase power system, for example, are driven by the same motor and drive line whereby a fluid condition or circulation interruption of one oil circuit that requires termination of pump operation in the one oil circuit terminates the pump operation in all oil circuits. Pump motor power is preferably drawn from an energy source that may be independent of that served by the transmission and/or distribution power source.

Abstract: A blade outer air seal (BOAS) casting core has first and second end portions and a plurality of legs. Of these legs, first legs each have: a first end joining the first end portion; a main body portion; and a second end. Second legs each have: a second end joining the second end portion; a main body portion; and a first portion. At least one of the second legs may have its first end joining the core first end portion and a plurality of apertures in the main body portion. Alternatively, at least one of the first legs may have its second end joining the core second end portion and a plurality of apertures in its main body portion.

Abstract: A cooled multiphase choke assembly comprising a first coil (L1, L2, L3) for each phase (U, V, W) and a first cooling element (11), each first coil (L1, L2, L3) comprising several turns of winding, which define a substantially tubular tunnel inside each coil (L1, L2, L3). The first cooling element (11) extends in the tubular tunnel of each first coil (L1, L2, L3).

Abstract: A toroidal transformer core topology having improved thermal and electrical properties has a two part core, one part concentrically disposed within the other, with the windings wound between the two. Less expensive materials and less material can be used to construct the core. The core can be constructed using inexpensive and efficient methods.

Abstract: The invention relates to a liquid-cooled choke comprising a choke core (1), a choke coil (2) and a path (3) for a cooling liquid to cool the choke. The choke core (1) is divided into at least two parts (1a, 1b) arranged in a cooling profile (4) to which the path (3) for the cooling liquid is arranged and which at the same time provides the choke with a frame and an assembly jig.

Abstract: An inductor includes an elongate magnetic core, a coil wrapped around the core and a spacer that separates the coil from the core to provide a coolant passage between the coil and the core. The coolant passage may include an air passage that extends substantially parallel to an axis of the core and that has first and second openings proximate respective first and second ends of the core. The coil may include a twisted bundle of individually insulated conductors. The inductor may be housed in a flux-tolerant compartment, i.e., a conductive aluminum structure that supports eddy currents with relatively acceptable resistive losses.

Abstract: A cooling system is provided for electrical components in which cooling assemblies (11, 45) are inserted in non-magnetic cores of the electrical components, and in which tubes provide both inflow and outflow of a cooling medium. The non-magnetic cores may be bobbins (30) for an inductor assembly or the core of a capacitor (40). The tubes may form a loop (11) in more than one plane to prevent inducing current in a single turn, or they may be split-flow closed-end tubes (45) inserted from one end of the electrical component. The bobbin cores (31) are also constructed with a non-conductive portion to prevent inducing a current in a single turn of a conductor.

Abstract: An electromagnet and associated apparatus and method are provided. The electromagnet includes a core and at least one winding disposed circumferentially about the core such that the winding extends at least one revolution around the core. The electromagnet further includes at least one spacer having channels defined therein and disposed circumferentially about the core and adjacent to the at least one winding. The channels facilitate cooling by directing fluid about the windings of the coil as fluid is introduced into the electromagnet.

Abstract: A coil apparatus is described that incorporates two or more conductors, wound in parallel, following the same path, in intimate physical contact throughout the path but electrically isolated. The current applied to each of the coils can be selected independently. The field generated by the coil, or force on the coil in a magnetic field, is proportional to the algebraic sum of the currents. The power applied to the coil is proportional to the sum of square of the currents. By independently selecting the appropriate current's to apply to each of the conductors, a desired field, or force, can be generated by the coil for any desired power applied to the coil. By judiciously selecting appropriate currents to apply to each of the conductors, a range of fields, or forces, may be selected for which a constant power may be applied to the coil. A constant power enables the coil to operate at a constant temperature.

Abstract: A high-power, liquid-cooled, multi-layer winding inductive device that has a region of interspersed winding layers and directed coolant flow over the interspersed windings to improve heat transfer and device life.

Abstract: A dry-type, resin-encapsulated transformer coil that includes multiple layers formed from a length of conductive material, and multiple cooling ducts that are formed of thermoplastic material and spaced between the layers of conductive material. The thermoplastic material forming the cooling ducts and the resin that encapsulates the multiple layers of conductive material are thermally and electrically compatible.

Abstract: An apparatus and method for providing cooling to a magnetic circuit element having a magnetic core disposed around a centrally located core support member having at least one core support member wall is disclosed which may comprise a core support coolant inlet; a core support coolant outlet; a plurality of interconnected coolant flow passages contained within the core support member wall and interconnected and arranged to pass coolant from one coolant flow passage to the next within the core support member wall along a coolant flow path within at least a substantial portion of the core support member wall from the core support coolant inlet to the core support coolant outlet.

Abstract: The present invention relates to a power transformer/reactor (14, 15, 16) for high voltages, comprising at least one winding having at least one current-carrying conductor. The winding comprises a solid insulation (7) surrounded by outer and inner layers (8,6) serving for equalization of potential and having semiconducting properties. The layers (6,8) and the insulation (7) adhere along essentially the whole of its contact surfaces. Said conductor is arranged interiorly of the inner semiconducting layer (6). The outer layer (8) is connected to ground or otherwise relatively low potential. Said solid insulation in the windings constitute substantially the total electrical insulation in the power transformer/reactor.

Abstract: A magnetic field generating device comprising a frame about which a current carrying coil of conductor is wound. The frame preferably includes spaced-apart side panels and an auxiliary supplementary cooling system panel. Each of the panels is configured with a plurality of spacers and/or perforations to facilitate and encourage the movement of air within the apparatus. The spacers are preferably provided on the interior surfaces of the primary panels to maintain the coil winding in a centered position therewith. Spacers may also be interpositioned between the various layers of the coil itself to enable airflow into and around the various coil layers. Of course, in the alternate embodiment a plurality of coils may be provided such that each individual layers or combination thereof may comprise an individual coil.

Abstract: An oil-filled pole-mounted distribution transformer comprises a tank housing a transformer core-coil assembly immersed in cooling oil. The tank is made of a corrosion-proof composite material and a radiator is provided for cooling the oil. The radiator is external to the tank and has a hot oil inlet and a cool oil outlet located at different levels into the tank for causing a natural circulation of oil through the radiator by thermal siphoning.

Abstract: A system (27) for reducing the temperature of cooling oil for a power transformer (12) includes a heat exchanger (44) interposed in the cooling oil system. The heat exchanger (44) relies upon a liquid-to-liquid exchange of heat from the heated oil to a coolant flowing through the heat exchanger. In one embodiment, the coolant provided to the heat exchanger is obtained from an absorption chiller (65). Heat energy is provided to the chiller (65) from a heat storage device (80). In a specific embodiment, the heat storage source (80) can be a phase change material device. In a preferred cooling system, a programmable controller (55) determines the activation and operation of the system. The controller (55) can sense transformer or cooling oil temperature to trigger activation. In a preferred embodiment, the controller (55) compares a current temperature history against a temperature profile to anticipate increased cooling requirements.

Abstract: In order to cool the windings, core and optionally the wall of the element (1) receiving the windings (3,4) and the core (2) as effectively as possible, conducting surfaces (5, 6, 8,15) are disposed inside said element in such a way that the flow of coolant initially passes along the windings (3,4), followed by the limbs (21,22) of the core surrounded by the windings, and subsequently the other areas (23, 24, 1). Said arrangement of conducting surfaces is particularly suitable for use with transformers having superconductive windings made of HTSL conductor material.

Abstract: A configuration of stacked cores and the heat dissipation for the stacked cores utilize a plurality of spacers provided between adjacent cores, whereby a gap is accordingly formed by the spacers to expedite the heat dissipation. Since a gap is defined between the adjacent cores, the heat dissipation surfaces for adjacent cores are increased and the generated heat is quickly removed from the stacked cores in a short time.

Abstract: An electrical reactor assembly and method of assembly is disclosed. The reactor is formed from a combination of a magnetic T-core and a pair of magnetic L-cores. A plurality of comb-like separators is placed over a vertical portion of the T-core. A wire, with a rectangular cross-section, is wound about the vertical portion of the T-core thereby forming a coil. The comb-like separators electrically isolate the wire from adjacent windings and the T-core. The L-cores are attached to the T-core such that they flank two sides of the coil. A plurality of taps is formed on a side of the coil that is not flanked by one of the L-cores. The taps are formed by extending individual windings further from the T-core than other common windings. Preferably, a hole is formed through the rectangular wire at the taps to provide a secure electrical connection to the wire.

Abstract: A three-phase transformer is presented comprising a magnetic circuit and three coil block. The magnetic circuit comprises two spaced-apart, parallel, plate-like elements; and three spaced-apart, parallel column-like elementary circuits. Each of the column-like elementary circuits carries the corresponding one of the three coil blocks, and serves for the corresponding one of the three phases. The column-like elementary circuits are substantially perpendicular to the plate-like elements, and are enclosed therebetween such as to form a spatial symmetrical structure about a central axis of the transformer.

Abstract: Disclosed is a transformer for a gas insulated electrical apparatus which requires no grounding field and which provides high accuracy with a simple structure. A transformer includes a capacitor type voltage divider having a floating electrode at a position opposed to a high-voltage conductor through an insulation sealing terminal mounted to a flange of a branch pipe provided on an inner surface of the annular grounding container; an ohm resistor for voltage division which has an impedance that is sufficiently smaller than the impedance between the floating electrode and the annular grounding container; and a converting portion which converts the detection voltage of the high-voltage conductor to a voltage value that allows processing on the secondary side.

Abstract: A transformer with an associated heat-dissipating plastic element is provided. The transformer includes a hollow main body, a core, a coil and a heat-dissipating plastic element. The core is installed inside the hollow main body while the coil wraps around the core. The heat-dissipating plastic element is also installed inside the hollow main body. The heat-dissipating plastic element encloses the core and the coil. Alternatively, the heat-dissipating plastic element encloses the hollow main body, the core and the coil so that heat generated by the coil may be directly conducted away to the exterior through the heat-dissipating plastic element.

Abstract: An electromagnetic inductor and transformer device and a method for making the same are disclosed. The device has a core that is separated into core sections along a dividing plane that extends essentially parallel to the magnetic field in the core. At least one cooling gap is formed between the core sections along the dividing plane to facilitate heat removal from the interior of the inductor and transformer device to the outside.

Abstract: In a linear motor coil assembly (12), and a method for manufacturing the same, a plurality of coils (14) are arranged in a line in a direction of movement and have respective coil axes perpendicular to the direction of movement of the motor. A flat cooling tube (20) is arranged to meander inside the plurality of coils. The cooling tube has a cross section elongated in a direction parallel to the coil axes, and a plurality of clearance holes (25) through which coolant flows are formed inside the cooling tube. The cooling tube has interleaved folds at least equal in number to the number of coils. The coils being fitted into these folds. At the time of manufacture of the coil assembly, the coils are wound around cores that are divided for each coil, and the cores are inserted into the folds of the cooling tube.

Abstract: A magnetic field applicator to heat magnetic substances in biological tissue, having a magnetic yoke with two pole shoes across from each other and separated from each other by a distance that defines the magnetic field exposure volume produced by the applicator, and with two magnetic coils, one assigned to each of the two pole shoes, to produce a magnetic field. The magnetic yoke and the pole shoes consist of ferrite segments assembled together. The pole shoes oppose each other and are surrounded by magnetic disk-shaped coils with one or more windings extending helicoidally, which creates an intermediate air gap between the pole shoes and coils. This results in a magnetic field applicator with the ability to effectively and efficiently administer hyperthermia and thermo-ablation procedures to destroy cancerous tissue in a patient, as well as having uses in other medical and industrial applications.