Patent application number | Description | Published |
20090309685 | METHOD FOR PRODUCING A TRANSFORMER COIL, AND A TRANSFORMER COIL PRODUCED USING THIS METHOD - A method for winding a coil for a transformer comprising providing a cylindrical inner tube of insulating material including a radially outwardly projected first end wall section disposed at a first end of the cylindrical inner tube and a radially outwardly projecting second wall section disposed at a second end of the cylindrical inner tube; winding a first insulating layer onto the cylindrical inner tube so as to extend to the first end wall section and the second end wall section; and winding a first winding wire layer onto the first insulating layer so as to provide a first distance between a first end of the first winding wire layer and the first wall section and a second distance between a second end of the first winding layer and the second end wall section. | 12-17-2009 |
20100245017 | PRODUCTION METHOD FOR A MULTI-LAYER TRANSFORMER WINDING HAVING INSULATING LAYER - A method is disclosed for producing a multi-layer transformer winding. During or after the winding of a conductor layer around a winding body, a layer of electrically insulating material can be applied on the radially outer surface thereof. A dry fiber composite can be used as the insulating material. The fiber composite can be bonded into an insulating layer by heating the transformer winding to a composite temperature. | 09-30-2010 |
20110001600 | TWO- OR MULTIPHASE TRANSFORMER - The disclosure relates to a transformer having a yoke which has a crosspiece and at least two limbs, over which limbs a coil is placed in each case, and having at least one carrier on which the crosspiece is fixed and which has bearing faces for the coils. At least two supporting blocks for each coil are mounted on each bearing surface. The supporting blocks are fitted with elastic compensation elements on the coil-side carrying face and have, on their longitudinal side faces, which run perpendicular to a carrying surface, at least one strip which extends the creepage path and runs in the longitudinal direction and parallel to the carrying surface of the supporting block. | 01-06-2011 |
20110032064 | METHOD FOR PRODUCTION OF A WINDING BLOCK FOR A COIL OF A TRANSFORMER AND WINDING BLOCK PRODUCED IN THIS WAY - A method is disclosed for production of a winding block for a coil of a transformer, having at least one winding composed of electrically conductive wire or strip material with a plurality of turns. An insulating layer is composed of electrically insulating fiber material with a specific number of windings of the insulating fiber material. The turns composed of electrical conductive material are fitted independently of the turns of the insulating material and, after a predetermined number of turns of electrically conductive material have been fitted, a smaller number of turns of electrically insulating material are fitted over the same section onto these turns of electrically conductive material, such that electrically insulating material which remains before reaching a number of turns of electrically conductive material is used as edge insulation. | 02-10-2011 |
20110140821 | TRANSFORMER - 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. | 06-16-2011 |
20110163835 | WINDING FOR A TRANSFORMER - A transformer has a coil including a plurality of layers of wound conductive material and layers in between made of wound insulation material. The layers of insulation material are wound in stages. The layers of insulation material are applied at an angle to the winding axis of the coil. | 07-07-2011 |
20110175695 | HOUSING FOR AN ELECTRIC MACHINE - 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. | 07-21-2011 |
20110221556 | TRANSFORMER - A transformer is provided with at least one core leg on which three windings are arranged side by side, whose discharges are designed to be mutually insulated. Each winding is formed by a near-core low-voltage winding, which are each wound by an associated high-voltage winding, and the discharges of the low-voltage windings are axially designed, so that the lateral spacing of the windings to each other is minimized. | 09-15-2011 |
20110273256 | MODULAR RING-SHAPED CORE - The disclosure relates to a ring-shaped core for a power transformer. The ring-shaped core extends about an imaginary center axis in the form of a closed toroidal structure and is constituted of a plurality of adjacent layers of sheet metal. The ring-shaped core, along the length of the toroidal structure, is constituted of at least three core section modules that can be connected to and detached from each other, the core section modules being interconnected by an overlap of individual sheet layers and/or sheet layer sections. The disclosure also relates to the arrangement of ring-shaped cores having winding modules. The latter can be arranged in a common connecting structure and every ring core having winding modules arranged therein can be separately introduced into the connecting structure and removed therefrom in a non-destructive manner. | 11-10-2011 |
20110273259 | DRY-TYPE TRANSFORMER - A dry-type transformer includes at least one high-voltage winding and one low-voltage winding. The windings are operatively connected to one another by an electromagnetic field, and each winding is constructed from winding conductors, wherein the high-voltage winding and the low-voltage winding have a defined distance from one another, and spacers are arranged between the windings and maintain the defined distance. | 11-10-2011 |
20110291791 | METHOD FOR PRODUCING WINDINGS FOR A DRY-TYPE TRANSFORMER - A method is provided for producing windings for a dry-type transformer with in each case one winding for the low voltage (LV winding) and one for the high voltage (HV winding). The LV and HV windings are each electrically insulated from one another and have layers which are electrically insulated from one another by virtue of, initially, the winding for the low voltage being produced from electrically conductive wire or tape material and an insulating layer including resin-impregnated fibre material. Prior to the application of the HV winding, the maximum insulating thickness for the layer insulation and the number of fibre rovings corresponding to this insulating thickness can be determined, and each winding layer and the associated insulating layer can be produced simultaneously with a physical offset with respect to one another. To produce the winding, fibre polymer layers can be applied, as layers of insulation, simultaneously with the winding conductor between the individual winding layers of the winding, and the finished winding is subjected to a curing operation. | 12-01-2011 |
20120000628 | METHOD FOR FUNCTION MONITORING AND/OR CONTROL OF A COOLING SYSTEM, AND A CORRESPONDING COOLING SYSTEM - Exemplary embodiments relate to a system and method for monitoring functional operational reliability of a cooling system having at least one thermosyphon for transformers provided with at least one evaporator and with at least one condenser. The cooling system using a coolant which can be vaporized and a gaseous medium, as a heat carrier. | 01-05-2012 |
20120056706 | WOUND TRANSFORMER CORE WITH SUPPORT STRUCTURE - A wound transformer core is provided with at least one core loop made of a magnetic material. The transformer core includes multiple thin amorphous band-like iron sheets which are concentrically stacked around at least one center axis. A lower yoke section, an upper yoke section, and at least two limb sections are formed. The transformer core includes a modular plate-like support structure which is affixed upright to the center axis on both face sides of the lower yoke section and on both face sides of each limb section such that neighbored iron sheets are affixed together at their outer edge. The modular plate-like support structure includes, for each face side of the corresponding core sections, at least two plate-like modules, which are each connected to each other by a first or second plug-in connection. | 03-08-2012 |
20120068800 | POWER TRANSFORMER WITH AMORPHOUS CORE - A transformer of dry design is disclosed having a core composed of amorphous material, which is sensitive to mechanical loads, having at least one winding former which surrounds the core and is in each case formed from at least one primary winding and secondary winding, and having at least one holding apparatus. A method for transformer production is also disclosed, wherein the holding apparatus is used to fix the at least one primary winding and secondary winding in each case and for this purpose it acts on each of the end faces of the at least one winding former. | 03-22-2012 |
20120075047 | TRANSFORMER CORE - A transformer core for a power transformer, and a power transformer including such a transformer core are provided. The transformer core includes at least two transformer core laminations which are arranged in parallel and are at least approximately congruently adjacent to each other. The transformer core laminations have a similar outline. At least one through-hole is arranged in the outline in each case. The transformer core laminations are comprised of at least predominantly an amorphous ferromagnetic material. At least one cooling channel is arranged between the transformer core laminations. | 03-29-2012 |
20120119870 | METHOD FOR PRODUCING A DISK WINDING AND DISK WINDING - An method for producing a disk winding having disks arranged alongside one another, includes winding the disk winding and fitting intermediate insulation between adjacent disks simultaneously, and subdividing the insulation into two sub-areas with a connecting conductor that runs from an end of one disk to a start of an adjacent disk along a diagonal within the intermediate insulation. The sub-areas can include a first intermediate area with a triangular cross-section formed below this diagonal and a second intermediate area which has an opposite triangular cross-section and formed above this diagonal. | 05-17-2012 |
20120139682 | AMORPHOUS TRANSFORMER CORE - 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. | 06-07-2012 |
20120222292 | CONDUCTOR HANDLING TOOL AND A METHOD OF APPLYING AN ELECTRICALLY INSULATING MATERIAL - A conductor handling tool has a plate-shaped tool body. The tool body includes a conductor receiving opening for receiving a conductor portion therein and for holding the conductor portion received therein. Further, an edge of the plate-shaped tool body is shaped convex as a tapered blade edge extending substantially within a y-z-plane. The tapered blade edge is directed away from the conductor receiving opening and is forming an outer circumferential portion of the tool body for splitting a portion of insulating material during winding of the insulating material. | 09-06-2012 |
20120274430 | HEAT EXCHANGER SYSTEM FOR DRY-TYPE TRANSFORMERS - Exemplary embodiments are directed to a heat exchanger system for transformers or reactors having at least one coil being cooled by gaseous fluids circulating around the transformer. The system having an enclosure that houses the transformer and the at least one coil, where flow of cooling gaseous fluid passes over the coil and is heated by the heat of the transformer or reactor the heated gas is directed to pass over a thermosiphon heat exchanger which dissipates the heat to a cooling media. | 11-01-2012 |
20130021130 | ARRANGEMENT HAVING AT LEAST TWO COILS WHICH ARE ARRANGED AXIALLY ONE ABOVE THE OTHER ON A COMMON CORE LIMB - An exemplary arrangement includes blocks arranged between the inner winding, the individual barriers and the outer winding in order to maintain defined spacing's along the circumference. At least two coils are arranged axially one above the other on a common core limb. Each coil has at least two windings arranged radially one above the other and barriers are provided between the windings. The barriers of adjacent coils are radially offset with respect to one another, and the edge regions of the barriers engage one another in a comb-like manner. | 01-24-2013 |
20130113589 | UNDERFLOOR TRANSFORMER - An underfloor transformer includes a layered transformer core and at least one electrical winding through which the transformer core extends along a limb axis. In each of two axial end regions of the transformer core, a securing device, which interacts with the transformer core mechanically, is provided. The securing devices are configured for such tensile force stressing. The underfloor transformer can be carried suspended therefrom. | 05-09-2013 |
20130127582 | SINGLE- OR MULTI-PHASE DRY-TYPE TRANSFORMER HAVING AT LEAST TWO COILS - A single- or multi-phase dry-type transformer includes at least two coils. A barrier between phases made of an electrically insulating material is arranged in the intermediate space between the individual coils. | 05-23-2013 |
20130293329 | TRANSFORMER WINDING WITH COOLING CHANNEL - At least two winding modules nested hollow-cylindrically one inside the other and extending around a common winding axis, wherein said winding modules are spaced radially apart from one another within at least one hollow-cylindrical cooling channel arranged therebetween by means of insulation strips, wherein the insulation strips have a cross-sectional form which avoid a surface profile radially with respect to the winding axis, the insulation strips including one of a fiber-reinforced epoxy, polyester resin, or from an unreinforced thermoplastic material. | 11-07-2013 |
20130293340 | TRANSFORMER WINDING - An exemplary transformer winding including at least two hollow-cylindrical, axially adjacent winding modules, which are arranged about a common winding axis and have an electrical conductor wound in layers, and a common electrical insulting layer, through which the winding modules are enveloped. The insulating layer has at least one annular, radial depression or annular, radial elevation, which is salient transversely to the winding axis on the radial outer face of said insulating layer. | 11-07-2013 |
20130300526 | COOLING SYSTEM FOR DRY TRANSFORMERS - The disclosure is related to a dry transformer, which includes a transformer core with at least two parallel limbs and upper and lower yokes, and at least two hollow cylindrical coils, each arranged as neighbored coils around a limb of the at least two parallel limbs. A cooling system can include at least one wall-like diaphragm in-between the neighbored coils, which is in parallel to the orientation of the limbs. | 11-14-2013 |
20140035709 | DRY TRANSFORMER HEATER - A dry-type transformer heater includes a closed housing, and at least one transformer winding arranged in the housing. The at least one transformer winding includes at least one corresponding winding conductor and a corresponding insulation layer surrounding the transformer winding, respectively. In addition to the respective winding conductor, at least one coil heating wire is provided in at least one of the insulation layer and on the surface of the insulation layer to input thermal power into the respective insulation layer. | 02-06-2014 |
20140077913 | SUPPLEMENTARY TRANSFORMER WINDING - A transformer winding and a dry-transformer are disclosed, which include a main transformer winding, and a supplementary transformer winding configured to be electrically connected in series with the main transformer winding. The supplementary transformer winding can include a first winding module, a second winding module, and a third winding module, each of the winding modules having at least a first, a second and a third winding segment, and wherein each of the winding segments has a tap. A changer is configured to be connected to the taps of the second winding module, and wherein the second winding module is configured to be electrically connected in series to at least one winding segment of the first winding module and the third winding module. | 03-20-2014 |
20140077918 | WINDING DEVICE, WINDING METHOD, AND TRANSFORMER WINDING - A transformer winding device, a method and a transformer are disclosed. The transformer winding winding device includes a rotary device configured to extend along an axis of rotation and configured to receive a transformer winding to be wound, at least one device configured to provide a plurality of insulation strips, and a comb-like guide device. The comb-like device is configured to deflect the plurality of insulation strips into at least one common winding plane and fed parallel to one another, at an angle to an axis of rotation, to the transformer winding to be wound. The comb-like guide device can include at least a first guide device element for a first group of insulation strips and a second guide device element for a second group of insulation strips, wherein the first and second guide device elements are offset with respect to one another in terms of axial length. | 03-20-2014 |
20140132381 | DRY-TYPE TRANSFORMER - A dry-type transformer for mobile applications includes a transformer core, at least one radially inner first winding segment, and at least one radially outer, second hollow cylindrical winding segment. The segments are wound around a common winding axis and the transformer core passes therethrough. The segments are nested inside one another and radially spaced apart from one another, such that a hollow cylindrical cooling duct is formed therebetween. Spacing is achieved by spacer elements arranged such that the cooling duct allows a passage of coolant in an axial direction. The spacer elements are formed and arranged along the radial circumference of the cooling duct over the axial length thereof such that the proportionate weight of the horizontal transformer can be borne on at least one contact surface of the at least second winding segment without causing deformation to the cooling duct. | 05-15-2014 |
20140320253 | TRANSFORMER-CORE - A transformer core is disclosed, which can include at least three hollow-cylindrical rectangular shaped core-discs wound from a magnetic band-like material, wherein two opposed limb areas and an upper and lower yoke area can be formed along a circumferential path. The core-discs can include one first and at least one second slanted area parallel to the circumferential path in the belonging limb area. The at least three core-discs can be connected according to a polygonal layout at their first slanted areas, which can be arranged adjacently face to face. Conical shaped polygonal adapter plates fitted to the polygonal layout within the upper and lower yoke areas, which can be clamped together. | 10-30-2014 |