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| Number | Title | Issue Date |
| 7346974 | Method for producing a conductor bar of transposed stranded conductors A method for producing a conductor bar including transposed stranded conductors for a large, rotating electric machine. The method includes a first step of cabling a plurality of electrically insulated individual wires to form a plurality of identical stranded condu... | 03/25/2008 |
| 7257881 | Method and structure for assembling electrical windings about a central member A method for assembling electrical windings about an axis, the windings being strips and wound in alternating strata with their widths parallel with the axis, includes the steps: (a) Winding a first-wound winding in a winding path about the axis establishing a first... | 08/21/2007 |
| 7227441 | Precision Rogowski coil and method for manufacturing same An improved Rogowski coil is formed on a toroidal core made of a thermoplastic or other moldable material, the core having a preferably continuous groove or grooves extending around the core. The grooves correspond in size to magnet wire which registers within the g... | 06/05/2007 |
| 7205947 | Litzendraht loop antenna and associated methods The antenna includes a Litz wire loop having a plurality of individually insulated wires braided together and a plurality of splices therein to define distributed capacitors. A magnetically coupled feed loop is provided within the electrically conductive loop, and a... | 04/17/2007 |
| 7205875 | Hybrid air/magnetic core inductor 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 pa... | 04/17/2007 |
| 7154233 | Converter circuit with coupled inductances having asymmetrical air gap arrangement The invention relates to a converter circuit with coupled inductances L1 and L2 which have a core K having an air gap S which is asymmetrical with respect to the inductances. ... | 12/26/2006 |
| 7064644 | Winding for a transformer or a coil and method for winding A winding for a transformer or a coil having a ribbon electrical conductor and an insulating material layer composed of ribbon insulation material wound jointly to form turns around a winding core. The individual turns of the winding have a predetermined winding ang... | 06/20/2006 |
| 6911759 | Stator coil assembly for superconducting rotating machines A stator for use in a rotating machine includes a first conductor; and a second conductor wound, in-hand, over the first conductor and along a longitudinal axis of the stator. The second conductor is electrically isolated from the first conductor along the length of... | 06/28/2005 |
| 6812543 | Micro device that generates a magnetomotive force in a long direction A micro device includes a first magnetic layer, a second magnetic layer and a thin film coil. The first magnetic layer and the second magnetic layer are formed so as to be opposite to each other and magnetically connected via a joint. The thin film coil includes a p... | 11/02/2004 |
| 6271743 | Winding arrangement of a coil To simplify coil production, in particular coils used for high-voltage transformers, a conductor is wound on to a winding form. The conductor comprises a plurality of conductor portions. The conductor portions overlap one another partially and are insulat... | 08/07/2001 |
| 5831506 | Stationary induction coil for a solenoidal induction launcher, and a solenoidal induction launcher provided with such a coil The invention relates to a coil comprising a hollow former on which a plurality of same-length conductors are wound, together with connection means between the conductors and an electrical power supply for the coil, according to the invention the conducto... | 11/03/1998 |
| 5764122 | Winding arrangement of a coil To simplify coil production, in particular coils used for high-voltage transformers, a conductor is wound on to a winding form. The conductor comprises a plurality of conductor portions. The conductor portions overlap one another partially and are insulat... | 06/09/1998 |
| 5760516 | Conductor bar for a stator winding of an electric machine The stator winding of an electrical machine comprises conductor elements which are spaced apart from one another, are electrically insulated from one another and are surrounded over their entire length by common main insulation. The cavities, which are ca... | 06/02/1998 |
| 5719545 | High power factor shielded superconducting transformer A superconducting transformer comprises a superconducting primary layer arranged to conduct an externally supplied primary electric current around a primary core to establish a magnetic flux through the primary core. The superconducting primary layer is f... | 02/17/1998 |
| 5600293 | Integrated magnetic exploding foil initiator fire set An integrated magnetic exploding foil initiator fire set includes a DC-DC converter with a first transformer, a triggering mechanism with a second transformer, and an integrated magnetic structure for the respective transformers. Inductive interference is... | 02/04/1997 |
| 5508674 | Core-form transformer An improved core-form transformer is disclosed. The core-form transformer includes a c-wrapped ribbon conductor with opposing wide sides and opposing thin sides. The c-wrapped ribbon conductor is wound around a core to form a plurality of coil sections. A... | 04/16/1996 |
| 5258680 | Armature winding structure for electric motors An armature winding structure for use in an electric motor includes a web-shaped strand bundle composed of a plurality of parallel strands. The strand bundle has a plurality of longitudinally spaced bends and a plurality of straight strand bundle segments... | 11/02/1993 |
| 5208433 | Inductive heating coil A cooling tube (T) is incorporated into each conductor (C1) of the coil. The current carried by this conductor is divided between the strands which are maintained in thermal contact with the tube even in transposition or twist areas in which the conductor... | 05/04/1993 |
| 5034717 | Stationary electromagnetic induction unit In a stationary electromagnetic induction unit according to this invention, a plate-like coil is constituted by a plurality of coil elements wound in parallel. Therefore, a conductor width of the coil element becomes small, and a stray loss caused by a le... | 07/23/1991 |
| 4864266 | High-voltage winding for core-form power transformers A high-voltage winding for core-form power transformers is disclosed that uses two different conductor configurations within a single coil to minimize eddy current losses. The winding includes a first elongated conductor bundle formed from a plurality of ... | 09/05/1989 |
| 4859978 | High-voltage windings for shell-form power transformers A high voltage electrical winding for shell form transformers is disclosed that reduces eddy current and circulating current losses within the winding. The winding is fabricated from an elongated conductor bundle that is spirally wound into a plurality of... | 08/22/1989 |
| 4638113 | Transposed bar for an electrical machine To simplify the fabrication and use of a transposed bar, the strip of insulating material for the strut projects higher than the conductor element stack and is incised along the longitudinal edges. Sections are formed, some of which (i.e., those immediate... | 01/20/1987 |
| 4571570 | Winding for static induction apparatus A winding for a static induction apparatus such as a transformer, a reactor and the like comprises a plurality of interleaved coils each formed by winding an electrically insulated strand conductor in a radial spiral. The coils are stacked axially and ele... | 02/18/1986 |
| 4554523 | Winding for static induction apparatus A winding for a static induction apparatus such as a transformer, a reactor and the like comprises a plurality of interleaved coils each formed by winding an electrically insulated strand conductor in a radial spiral. The coils are stacked axially and ele... | 11/19/1985 |
| 4510475 | Disk coil winding of interwound single or double coils Disk coil winding formed of interwound single or double coils wherein insulation of outer turns opposite inner and outer generated surfaces, respectively, of the winding is reinforced in comparison with normal insulation of conductors of the winding inclu... | 04/09/1985 |
| 4486730 | Disc coil winding of interwound single or double coils A disc coil winding of interwound coils is formed of winding conductors covered with normal insulation, the winding having a radially inner and a radially outer surface. A plurality of the coils are disposed at an input to the winding, and have respective... | 12/04/1984 |
| 4471337 | Conductor bundles for the coils of dry inductors Conductor bundles for the concentric coils of a dry inductor having no iron core. The coils define cooling air gaps therebetween, adjacent ones of the coils being electrically connected in parallel and each coil being comprised of turns of a conductor bun... | 09/11/1984 |
| 4460885 | Power transformer A power transformer characterized by inner and outer low voltage winding sections and a high voltage winding section disposed therebetween. The low voltage windings are comprised of a plurality of pancake coils, and the high voltage winding are comprised ... | 07/17/1984 |
| 4431860 | Multistranded component conductor continuously transposed cable This invention relates to an electrical cable useful in large power transformers and reactors. The cable is composed of a plurality of separate ropes which are generally of the same size and configuration which may be combined in accordance with a predete... | 02/14/1984 |
| 4403163 | Conductor bar for electric machines and method of manufacture thereof Conductor bar for electric machines operating at high voltage, including at least two subconductor packets being disposed side by side and being formed of mutually insulated subconductors, the subconductors being intertwined in such a manner that each sub... | 09/06/1983 |
| 4395693 | Electrical winding for a transformer, a choke coil or the like The invention relates to an electrical winding for a transformer, a choke coil or the like, particularly for high frequencies, wherein the conductor forming the winding is radially subdivided into n subconductors and within the winding the subconductors a... | 07/26/1983 |
| 4381467 | Multiplanar conductor bar for electric machines, especially for turbo-generators A multiplanar conductor bar for electric machines comprising subconductors superimposed radially in a number n of circumferentially mutually adjacent planes, n being a whole, even number between six and ten, inclusive, and transposed by at least 360°. A ... | 04/26/1983 |
| 4321426 | Bonded transposed transformer winding cable strands having improved short circuit withstand A heat shrunken polymeric material is wrapped around a plurality of adhesive coated, insulated wire strands juxtaposed in a transposed configuration to compact the metal strands into intersurface contacting relation, and thus promote improved bonding toge... | 03/23/1982 |
| 4318066 | Externally shielded disk windings for transformers A disk wound transformer winding employing at least two external electrostatic shields extending axially along the outside of the disk winding for grading the impulse voltage within the winding. The inner external shield closest to the winding is connecte... | 03/02/1982 |
| 4316169 | Windings for electrical inductive apparatus Windings for electrical inductive apparatus are disclosed which include a plurality of first and second pairs of disc coil sections arranged in a stack. Each of the second pairs of disc coil sections are disposed between the first pairs of disc coil secti... | 02/16/1982 |
| 4295071 | Lattice bar for electrical machinery The insulation requirements of a lattice bar for inhibiting glow discharges can be reduced by providing longitudinal notches in the bending portions of the flat spacing conductors in the lattice bar. The notches can be provided on one or both sides of the... | 10/13/1981 |
| 4270111 | Electrical inductive apparatus An interleaved turn, high series capacitance winding for electrical inductive apparatus having four mutually interleaved, electrically conductive paths through a plurality of axially spaced pancake coils. The pancake coils have a like number of total cond... | 05/26/1981 |
| 4262163 | Busway phase transposition assembly In a busway having plural busbars disposed with their broad sides in face-to-face relation, the ends of longitudinally aligned outside busbars are cut at complementary angles to create a single edge connecting segment for each busbar which extends through... | 04/14/1981 |
| 4258467 | Method of making transformer A primary coil and N secondary coils of insulated electrically conductive wire are wound side-by-side about a ferrite core. Every T turns, the wire forming the secondary coils is wound over a separator strip forming an array of loops. A pair of spaced par... | 03/31/1981 |
| 4176237 | Four a induction The present invention concerns an induction furnace. It is the object of the invention to increase the power of such furnaces while maintaining their weight or space requirements, or, to reduce their weight or space requirements for a given power, or furt... | 11/27/1979 |
