Laminated Type (includes Bundles Of Rods Or Wires) Patents (Class 336/234)
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Patent number: 7698808Abstract: A substrate is prepared that includes substrate segments arranged in series in the X and Y directions. The substrate segments are respectively provided with circuit patterns on its one side and electrodes on the other side. Sets of IC devices including bobbins are mounted on the sides with the circuit patterns of the respective substrates. A conductor is wound around the bobbins successively to form the windings. Portions of the conductor extending between the adjacent windings are pressed against and connected to the circuit patterns to form leading and trailing ends of the windings connected to the circuit patterns. Thereafter, the substrate is severed to provide surface-mount coil packages each comprising the circuit board and the set of IC devices including the coil.Type: GrantFiled: January 2, 2008Date of Patent: April 20, 2010Assignee: Citizen Electronics Co., Ltd.Inventor: Masahiro Furuya
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Publication number: 20100085140Abstract: A low-loss ferrite comprising as main components 46.5-49.5% by mol of Fe2O3, 17-26% by mol of ZnO, 4-12% by mol of CuO, and 0.2% or more and less than 1.2% by mol of CoO, the balance being NiO, and 0.03-1.4% by mass (as SnO2) of Sn based on 100% by mass of the main components, and having an average crystal grain size of 0.7-2.5 ?um, and an electronic device obtained by integrally sintering pluralities of layers of this low-loss ferrite and coil-shaped electrodes formed in the laminate.Type: ApplicationFiled: April 16, 2008Publication date: April 8, 2010Applicant: Hitachi Metals, Ltd.Inventors: Satoru Tanaka, Takeshi Tachibana
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Patent number: 7675398Abstract: Magnetic flux in a magnetic flux distribution inside a wound iron core for a stationary apparatus is mal-distributed toward the inner periphery side where the magnetic path of a laminated magnetic steel sheet is short with respect to the total lamination thickness and magnetic resistance is small and the inner periphery side on which magnetic flux is concentrated has a high magnetic flux density and increased iron loss, and therefore magnetic steel sheets of different magnetic characteristics are disposed at an arbitrary lamination ratio to make uniform the magnetic flux distribution inside the same wound iron core.Type: GrantFiled: July 7, 2006Date of Patent: March 9, 2010Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Hiroyuki Endou, Makoto Shinohara, Masanao Kuwabara, Yoichi Amako, Toshiki Shirahata
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Publication number: 20100026443Abstract: A magnetic component and a method for manufacturing a low profile, magnetic component. The method comprises the steps of providing at least one sheet, coupling at least a portion of at least one winding to the at least one sheet, and laminating the at least one sheet with at least a portion of the at least one winding. The magnetic component comprises at least one sheet and at least a portion of at least one winding coupled to the at least one sheet, wherein the at least one sheet is laminated to at least a portion of the at least one winding. The winding may comprise a clip, a preformed coil, a stamped conductive foil, or an etched trace using chemical or laser etching. The sheet may comprise any material capable of being laminated and/or rolled, including, but not limited to, flexible magnetic powder sheets.Type: ApplicationFiled: July 29, 2008Publication date: February 4, 2010Inventors: Yipeng Yan, Robert James Bogert
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Patent number: 7656266Abstract: A toroidal power transformer is disclosed. The toroidal power transformer comprises a circular core composed of plurality of laminated electrically conductive materials, a plurality of multi-layered first windings radially wound around the circular core, said winding arranged with an angular spacing of 2? and a number of windings in each winding layer is less than a number of windings in each previous layer, a multi-layered second winding radially wound around the circular core covering a corresponding one of said plurality of first windings, wherein the layers of each of said second windings are arranged to form a substantially triangular cross-section; and an insulating layer between each of said first and second windings.Type: GrantFiled: January 9, 2008Date of Patent: February 2, 2010Inventor: Kern K. N. Chang
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Patent number: 7656267Abstract: The present disclosure relates to electrical transformer assemblies including a first lamination assembly defining a passage therethrough; and a second lamination assembly configured and dimensioned for press-fit or slide-fit engagement in the passage formed in the first lamination assembly. The first lamination assembly includes a stack of laminations each defining a central opening and defining the passage of the first lamination assembly when in a stacked condition. Each lamination of the first lamination assembly defines at least one shaped recess formed in a side edge of the central opening. The second lamination assembly includes a stack of laminations each including at least one shaped tab extending from a side edge thereof, wherein each tab is configured and dimensioned for press-fit or slide-fit engagement in a respective shaped recess formed in the side edges of the passage formed in the first lamination assembly.Type: GrantFiled: April 28, 2005Date of Patent: February 2, 2010Assignee: Tyco Electronics CorporationInventor: Daniel Len Johnson
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Patent number: 7647692Abstract: 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.Type: GrantFiled: February 14, 2006Date of Patent: January 19, 2010Assignee: ABB Technology AGInventors: Thomas J. Lanoue, Michael J. Mitchell, William E. Pauley, Jr., Charlie H. Sarver
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Publication number: 20100007457Abstract: Magnetic component assemblies and core structures including coil coupling arrangements, that are advantageously utilized in providing surface mount magnetic components such as inductors and transformers.Type: ApplicationFiled: July 23, 2009Publication date: January 14, 2010Inventors: Yipeng Yan, Robert James Bogert
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Patent number: 7646610Abstract: A DC-DC converter comprising a soft-magnetic, multi-layer substrate provided with a laminated coil constituted by connecting pluralities of conductor lines, and a semiconductor integrated circuit device comprising a switching device and a control circuit, which are mounted on the soft-magnetic, multi-layer substrate; the semiconductor integrated circuit device comprising an input terminal, an output terminal, a first control terminal for controlling the ON/OFF of the switching device, a second control terminal for variably controlling output voltage, and pluralities of ground terminals; the soft-magnetic, multi-layer substrate comprising first external terminals formed on a first main surface, first connecting wires formed on the first main surface and/or on nearby layers, second connecting wires formed between the side surface of the multi-layer substrate and a periphery of the laminated coil, and second external terminals formed on a second main surface; and terminals of the semiconductor integrated circuitType: GrantFiled: October 30, 2006Date of Patent: January 12, 2010Assignee: Hitachi Metals, Ltd.Inventor: Mitsuhiro Watanabe
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Patent number: 7646281Abstract: An apparatus for an electric arc welder comprising a first electromagnetic device including a first core assembly, wherein the first core assembly has a first stack of laminations which are press-fitted or snapped together into interlocking engagement with a complementary second stack of laminations so as to form two flux paths through the first core assembly, each of which passes through a center portion of the first core assembly; a second electromagnetic device, such as a transformer, including a second core assembly, wherein the second core assembly has a first stack of laminations which are press-fitted or snapped together into interlocking engagement with a complementary second stack of laminations so as to form two flux paths through the second core assembly, each of which passes through a center portion of the second core assembly; and wherein the two core assemblies of the electromagnetic devices are press-fitted or snapped together into interlocking engagement with each other.Type: GrantFiled: January 14, 2005Date of Patent: January 12, 2010Assignee: Lincoln Global, Inc.Inventors: Craig L. Diekmann, Lawrence A. Boehnlein, Larry B. Solski, Dale L. Bilczo
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Patent number: 7623018Abstract: Technology presented in the following utility patent yields a significant innovation within the field of electrical lighting. An alternative configuration of the filter inductor, which serves as part of a passive power factor correction circuit, increases the overall efficiency of fluorescent ballast. The core of the inductor is essentially comprised of a vertically positioned, laminated silicon steel stack within the electronic ballast housing. The vertical orientation allows for a significant reduction in the height and width of the ballast housing, thus creating more effective use of space. Furthermore, each individual laminated silicon steel plate's outside corner angles assume a crescent moon shape. This unique structure serves to provide additional space for the ballast's input lead wires by forming total three (3) of long narrow channels. In order to balance any offset in magnetic flux density caused by the crescent moon shape, the two alternate interior angles of the sheet are arc-shaped.Type: GrantFiled: March 29, 2006Date of Patent: November 24, 2009Inventor: Kevin J. Yang
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Patent number: 7595578Abstract: A laminated core segment 30 into which a stator core is split has a core main body 31 that extends in an arc shape. On one end section of the core main body 31 there is formed a connecting section 40, and on the other end section there is formed a connecting section 41. The connecting section 40 is able to connect with the connecting section 41 of another laminated segment 30. In the connecting section 40 there is provided a protruding protrusion section 48, and the protrusion section 48 interferes with an interference section 53 on the connecting section 41 side when the stator core 30 is forced towards the direction in which the stator core is split. As a result, an assembly operation of the stator core becomes easier, and a magnetically excellent connecting structure can be obtained.Type: GrantFiled: May 2, 2006Date of Patent: September 29, 2009Assignee: Mistuba CorporationInventors: Noriyuki Aramaki, Masayuki Okubo, Mikio Kawamura, Takeshi Yamazaki, Shuichi Fusegawa, Tsugio Yokoo
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Patent number: 7561016Abstract: An iron core includes an electromagnetic steel plate having a first region on the surface of which an insulating film is formed and a second region which is not covered with the insulating film and exposed, and a coating member which coats at least the second region. The second region is formed by removing the insulating film by machining.Type: GrantFiled: May 19, 2006Date of Patent: July 14, 2009Assignee: Canon Kabushiki KaishaInventor: Hiroyoshi Kubo
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Patent number: 7557687Abstract: To provide a magnetic core for an electromagnetic apparatus and an electromagnetic apparatus provided with the magnetic core capable of reducing magnetic resistance, a magnetic core for an electromagnetic apparatus, having a middle leg section, having a first outer leg section and a second outer leg section which are arranged on each side of the middle leg section, having a first link section and a second link section respectively linking each side of the middle leg section, the first outer leg section and the second outer leg section, and having a first opening and a second opening located between the respective leg sections, the magnetic core comprising two cores which are joined with each other with a first abutting section extending through the middle leg section to insides of the first and second link sections, a second abutting section extending through the first outer leg section, and a third abutting section extending through the second outer leg section, in which the first abutting section consists mType: GrantFiled: April 21, 2006Date of Patent: July 7, 2009Assignee: Tamura CorporationInventor: Osamu Watanabe
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Patent number: 7527744Abstract: An NiCuZn-base ferrite of the invention comprises as main components an iron oxide in an amount of 45.0 to 49.0 mol % on Fe2O3 basis, an copper oxide in an amount of 5.0 to 14.0 mol % on CuO basis and a zinc oxide in an amount of 1.0 to 32.0 mol % on ZnO basis with a nickel oxide accounting for the rest mol % on NiO basis. With respect to the main components, a bismuth oxide is contained in an amount of 0.25 exclusive to 0.40% by weight on Bi2O3 basis, and a tin oxide is contained in an amount of 1.00 to 2.50% by weight on SnO2 basis. The invention ensures a leap upward in direct-current bias characteristics.Type: GrantFiled: August 30, 2006Date of Patent: May 5, 2009Assignee: TDK CorporationInventors: Ryuichi Wada, Takuya Aoki, Hiroshi Momoi, Yukio Takahashi, Takahiro Satoh
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Publication number: 20090091414Abstract: Saturation of nonlinear ferromagnetic core material for on-chip inductors for high current applications is significantly reduced by providing a core design wherein magnetic flux does not form a closed loop, but rather splits into multiple sub-fluxes that are directed to cancel each other. The design enables high on-chip inductance for high current power applications.Type: ApplicationFiled: October 9, 2007Publication date: April 9, 2009Inventors: Peter J. Hopper, Peter Smeys, Andrei Papou
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Publication number: 20090085711Abstract: A laminated coil component includes high-magnetic-permeability ferrite layers that are disposed on both main surfaces of a low-magnetic-permeability ferrite layer. Pores or pores filled with a resin are formed in the low-magnetic-permeability ferrite layer. Nickel in the high-magnetic-permeability ferrite layers does not significantly diffuse into the pores or the pores filled with the resin during firing, and thus, Ni does not readily diffuse into the low-magnetic-permeability ferrite layer.Type: ApplicationFiled: December 17, 2008Publication date: April 2, 2009Applicant: MURATA MANUFACTURING CO., LTD.Inventor: Tomohide IWASAKI
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Publication number: 20090079532Abstract: A composite magnetic core construction to replace conventional magnetic core construction for transformers, inductors, motors, generators, relays, solenoids, and delay lines. The composite core consists of a principal magnetic core section and an alternate magnetic core section. An example for constructing cores with high residual inductance above saturation is a 50% principal magnetics to a 50% alternate magnetics ratio. The alternate magnetics needs to be more economical per pound than the principal magnetics. The alternate magnetics also needs to have the same effective magnetic flux density saturation as the principal magnetics. When these two requirements are met, then the composite core will have the same power density (Watts/lb) as the original conventional core, but will be less expensive.Type: ApplicationFiled: September 18, 2008Publication date: March 26, 2009Inventor: Norman F. Muelleman
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Patent number: 7508293Abstract: A magnetic circuit for an ignition coil or a transformer, including an inner, essentially rod-shaped core and an outer core. The outer core includes a strip-shaped element of thickness, length and width, and is situated around the inner core in such a way that the strip-shaped element is positioned at the faces of the inner core with its thickness perpendicular to the longitudinal direction of the inner core.Type: GrantFiled: October 6, 2006Date of Patent: March 24, 2009Assignee: Robert Bosch GmbHInventors: Stefan Groezinger, Guenter Escher, Lothar Detels, Konstantin Lindenthal, Thomas Breckle, Nikolaus Hautmann, Tim Skowronek, Werner Steinberger
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Patent number: 7504924Abstract: An inductance element (1) comprises a core (2) having a multilayer body (6) composed of magnetic alloy thin ribbons (5) and an insulating coating layer (7) which covers the peripheral surface of the multilayer body without being bonded thereto, and a coil (4) wound around the core (2). The magnetic alloy thin ribbons (5) are stacked in a non-adhered state or with a flexible insulating adhesive layer therebetween. Having such a structure, the inductance element can stably attain good characteristics even when it is small-sized or made short.Type: GrantFiled: October 25, 2004Date of Patent: March 17, 2009Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Tetsuo Inoue, Takao Kusaka, Taiju Yamada
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Publication number: 20090040002Abstract: An iron core built in a transformer, a rectifier, a stabilizer, a lamp, and others is disclosed. When the iron core is formed, an E-shaped iron core and a pair of ?-shaped iron cores, which are arranged on both sides of the E-shaped iron core, are simultaneously stamped from a sheet of silicon steel. A predetermined number of E-shaped iron cores and pairs of ?-shaped iron cores are assembled and laminated to form a laminated iron core. The iron core includes the E-shaped iron core having side legs symmetrically formed on both sides thereof and a center leg formed between the side legs and coupled to a bobbin around which a coil is wound, and the pair of ?-shaped iron cores each having a long leg formed corresponding to the side leg of the E-shaped iron core and a short leg formed corresponding to the center leg of the E-shaped iron core.Type: ApplicationFiled: April 7, 2006Publication date: February 12, 2009Inventors: Myung-Dae Kim, Myung-Deuk Kim, Gap-Gyun Jeong
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Publication number: 20090021337Abstract: A multilayer composite electronic component is provided with an inductor section and a varistor section. The inductor section has a first sintered body consisting of a stack of nonmagnetic layers, and coil conductors arranged in the first sintered body. The varistor section has a second sintered body consisting of a stack of varistor layers, hot electrodes, and ground electrodes. The first sintered body and the second sintered body are integrally fired. A region of the first sintered body sandwiched between the coil conductors and regions of the first sintered body inside the respective coil conductors are comprised of a magnetic material or a nonmagnetic material and contain a ferrite material containing a Cu component in an amount of 0.05 mol % to 2 mol % in terms of CuO.Type: ApplicationFiled: July 8, 2008Publication date: January 22, 2009Applicant: TDK CORPORATIONInventor: Takahiro SATO
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Publication number: 20090009280Abstract: A magnetic core according to the present invention is used in a current sensor for detecting amount of current flowing through a conductor by a Hall element. The magnetic core is made of a resin material, in which a granular magnetic material is dispersed, and is shaped to form a circular magnetic flux passage therein by injection molding. The magnetic core is formed by laminating plural layers in an inside to outside direction of the magnetic core, and a magnetic material content is made higher in the outer layers than in the inner layers. In this manner, uniformity of the magnetic flux density in the core is improved. Alternatively, the magnetic core is made by laminating plural layers having respective magnetic material content ratios in its thickness direction to adjust magnetic saturation to a desired level. A measurable range of electric current is widened by suppressing magnetic saturation in the magnetic core without increasing its size.Type: ApplicationFiled: March 31, 2008Publication date: January 8, 2009Applicant: DENSO CORPORATIONInventor: Masato Ishihara
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Patent number: 7471183Abstract: There is provided a joint structure of a wound iron core in which iron core characteristics can be enhanced by improving the distribution of magnetic flux within an iron core. A wound iron core is formed to provide a joining structure or a butt joining structure and a lap joining structure disposed in an appropriate arrangement in which the a margin of overlapping is more increased as being closer to an outer periphery from an inner periphery of the iron core, taking a distribution of magnetic flux density within the iron core into consideration.Type: GrantFiled: October 10, 2007Date of Patent: December 30, 2008Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Kouji Yamashita, Youji Matsuda, Kazuo Nishiyama, Masao Hosokawa, Kazuyuki Fukui, Hidemasa Yamaguchi, Tooru Honma, Hiroyuki Endou, Makoto Shinohara
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Publication number: 20080272876Abstract: Magnetic flux in a magnetic flux distribution inside a wound iron core for a stationary apparatus is mal-distributed toward the inner periphery side where the magnetic path of a laminated magnetic steel sheet is short with respect to the total lamination thickness and magnetic resistance is small and the inner periphery side on which magnetic flux is concentrated has a high magnetic flux density and increased iron loss, and therefore magnetic steel sheets of different magnetic characteristics are disposed at an arbitrary lamination ratio to make uniform the magnetic flux distribution inside the same wound iron core.Type: ApplicationFiled: July 7, 2006Publication date: November 6, 2008Inventors: Hiroyuki Endou, Makoto Shinohara, Masanao Kuwabara, Yoichi Amako, Toshiki Shirahata
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Patent number: 7430796Abstract: In a method for winding the stator of a multiphase electric motor a plurality of mutually spaced stator teeth are assigned to each phase, wherein all the teeth of the stator are wound without a break in the winding wire, and wherein the winding wire is taken via a contact-making element of a contact-making device before or after the winding of all the stator teeth assigned to a phase.Type: GrantFiled: May 8, 2006Date of Patent: October 7, 2008Inventors: Joachim Baumgartner, Tobias Buban
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Patent number: 7405644Abstract: An ignition coil for an internal combustion engine includes a core assembly. The core assembly has a magnetically active core made of sheet-metal strips, a damping element and a sheath surrounding the core and the damping element. Different ways are described for improving the discharge of air trapped in the core assembly during casting of the ignition coil. For example, the damping element is designed with a V-shaped incision or a semipermeable diaphragm.Type: GrantFiled: August 22, 2006Date of Patent: July 29, 2008Assignee: Robert Bosch GmbHInventor: Florian Herzog
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Patent number: 7403091Abstract: In an inductance component including coil and multi-layered magnetic body layer formed from first metal layer, first metal magnetic body layer, middle layer including copper oxide and second metal magnetic body layer, which are piled at least on one surface of base material, first and second metal magnetic body layers and include at least one of Fe, Ni and Co and middle layer is formed from a material having specific resistance larger than that of first and second metal magnetic body layers. In accordance with such a structure, provided can be a small-sized flat inductance component superior in mass-production and used in a high frequency band.Type: GrantFiled: July 1, 2005Date of Patent: July 22, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hitoshi Ishimoto, Nobuya Matsutani
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Patent number: 7378774Abstract: A laminated core having a first number of magnetic poles, the first number being a natural number divided by two, of a rotary electric machine, includes a plurality of arc-shaped unit cores each having a second number of magnetic poles, the second number being a natural number except for an aliquot part of the first number. The unit cores are wound and laminated a predetermined number of times in a circumferential direction into a spiral shape in such a manner that an axial lamination amount of the unit cores is obtained by an equation of X=?*t/360, X being the axial lamination amount, ? being a winding angle of the unit cores, and t being a thickness of the unit core. The unit cores are adjacent to each other in the circumferential direction connected to each other at a part of an outer circumference thereof.Type: GrantFiled: August 25, 2006Date of Patent: May 27, 2008Assignee: Aisin Seiki Kabushiki KaishaInventors: Atsushi Torii, Masafumi Sakuma, Akinori Hoshino, Hiroyuki Yamamoto
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Patent number: 7378036Abstract: A ferrite material of the present invention is configured such that 0.05 to 1.0 wt % of bismuth oxide in terms of Bi2O3, 0.5 to 3.0 wt % of tin oxide in terms of SnO2, and 30 to 5000 wt ppm of chromium oxide in terms of Cr2O3 are added to a predetermined main component mixture composition. Therefore, it is possible to achieve an improvement in DC bias characteristics, an improvement in temperature characteristics of initial magnetic permeability, and an improvement in resistivity and further achieve an improvement in burned body strength, particularly in burned body flexural strength (bending strength).Type: GrantFiled: October 26, 2005Date of Patent: May 27, 2008Assignee: TDK CorporationInventors: Ryuichi Wada, Takuya Aoki, Atsuhito Matsukawa, Kensaku Asakura
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Publication number: 20080117014Abstract: A nanocrystallised tape-wound core without a localised airgap, consisting of a nanocrystalline material with the following atomic composition: [Fe1-aNia] 100xyza??CuxSiyBzNbaM??M??, wherein a?0.3, 0.6?x?1.5, 10?y?17, 5?z?14, 2?a?6, ??7, ??8, M? is at least one of the elements V, Cr, Al and Zn, M? is at least one of the elements C, Ge, P, Ga, Sb, In and Be, with a permeability ? of 200 to 4000, a saturation of more than 1 T, an induction range, in which the permeability does not vary by more than 5%, of more than 0.9 T, a remanent induction of less than 0.02 T and a cut-off frequency higher than 1 MHz, such that ? varies by less than 1% when the core is aged for 100 h at more than 100° C., ? varies by less than 5% when the core is coated, ? varies by less than 15% when the temperature is in the range of ?25° C. and +60° C., and by less than 25% when the temperature is in the range of ?40° C. and +120° C., and ? varies in a monotonic and substantially linear manner with a temperature of ?40° C. to +120° C.Type: ApplicationFiled: October 26, 2005Publication date: May 22, 2008Applicant: IMPHY ALOYSInventors: Thierry Waeckerle, Fabien Simon, Francisco Alves, Thierry Save, Aiain Demier
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Patent number: 7353587Abstract: A method of manufacturing a magnetic core includes providing a substrate with magnetically permeable material that has a first region and a second region near the first region, providing support to maintain a juxtaposition between the first region and the second region, forming a slit through the magnetically permeable material between the first region and the second region, introducing a binding agent into the slit and removing the support; wherein the binding agent maintains the juxtaposition between the first region and the second region after the support is removed.Type: GrantFiled: November 1, 2004Date of Patent: April 8, 2008Assignee: VLT, Inc.Inventors: Patrizio Vinciarelli, Eva M. Kenny-McDermott
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Patent number: 7355392Abstract: A proximity sensor assembly includes a multilayer printed wiring board proximity sensor, the proximity sensor being operable as either a variable-reluctance sensor or an eddy current loss sensor. The proximity sensor includes a plurality of layers configured to form at least one wound coil disposed about at least a portion of a core. The coils are electrically driven to generate an alternating magnetic field such that the inductance of the coils changes when a permeable or conductive object is moved in relation to the magnetic field. The change in inductance is recognized and used to detect the proximity and presence of an object relative to the sensor.Type: GrantFiled: August 29, 2006Date of Patent: April 8, 2008Assignee: Simmonds Precision Products, Inc.Inventors: Robert Downing LaClair, Lawrence Carl Maier, Anthony Dean Ringer
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Patent number: 7304559Abstract: A device for efficient transmission of electrical energy and/or information is built in the manner of a rotary transformer. The cores of this device are made of ferromagnetic rings of a U-shaped cross section of soft iron, or of soft iron core stacks of annular or hollow cylindrical shape, the ring-shaped or hollow cylindrical sheets typically being unslotted. There can be several coil sets within such a device; in this way several channels can be made available for parallel transmission of electrical energy and/or information.Type: GrantFiled: October 4, 2006Date of Patent: December 4, 2007Assignee: Prueftechnik Dieter Busch AGInventors: Ralf Förtsch, Werner Mühleisen, Roland Hölzl
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Patent number: 7292127Abstract: There is provided a joint structure of a wound iron core in which iron core characteristics can be enhanced by improving the distribution of magnetic flux within an iron core. A wound iron core is formed to provide a joining structure or a butt joining structure and a lap joining structure disposed in an appropriate arrangement in which the a margin of overlapping is more increased as being closer to an outer periphery from an inner periphery of the iron core, taking a distribution of magnetic flux density within the iron core into consideration.Type: GrantFiled: May 25, 2005Date of Patent: November 6, 2007Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Kouji Yamashita, Youji Matsuda, Kazuo Nishiyama, Masao Hosokawa, Kazuyuki Fukui, Hidemasu Yamaguchi, Tooru Honma, Hiroyuki Endou, Makoto Shinohara
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Patent number: 7292128Abstract: A single piece core structure for magnetic components that is formed without utilizing insulating spacer materials and bonding materials.Type: GrantFiled: February 15, 2006Date of Patent: November 6, 2007Assignee: Cooper Technologies CompanyInventor: Renford LaGuardia Hanley
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Patent number: 7289013Abstract: A bulk amorphous metal inductive device includes a magnetic core having at least one low-loss bulk ferromagnetic amorphous metal magnetic component forming a magnetic circuit having an air therein. The component has a plurality of similarly shaped layers of amorphous metal strips bonded together to form a polyhedrally shaped part. The device has one or more electrical windings and is easily customized for specialized magnetic applications, e.g. for use as a transformer or inductor in power conditioning electronic circuitry employing switch-mode circuit topologies and switching frequencies ranging from 1 kHz to 200 kHz or more. The low core losses of the device, e.g. a loss of at most about 12 W/kg when excited at a frequency of 5 kHz to a peak induction level of 0.3 T, make it especially useful at frequencies of 1 kHz or more.Type: GrantFiled: February 14, 2005Date of Patent: October 30, 2007Assignee: Metglas, Inc.Inventors: Nicholas J. Decristofaro, Gordon E. Fish, Ryusuke Hasegawa, Carl E. Kroger, Scott M. Lindquist, Seshu V. Tatikola
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Patent number: 7256677Abstract: The present invention is directed to a transformer having a stacked core, which includes upper and lower yokes and first and second outer legs. The core also includes one or more inner legs. Each of the upper and lower yokes is formed from a stack of plates and has a rectangular cross-section. Each inner leg is formed from a stack of plates and has a cruciform cross-section. Each of the first and second outer legs is formed from a stack of plates and may have a cruciform cross-section.Type: GrantFiled: March 30, 2005Date of Patent: August 14, 2007Assignee: ABB Technology AGInventors: William E. Pauley, Jr., Charlie H. Sarver, Rush B. Horton, Jr.
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Patent number: 7236076Abstract: An electric component having a variable air gap effect comprises two cores having a magnetic field air gap disposed at the connecting position of the two cores, and a coil wound around the cores and disposed at the installing position of the magnetic field air gap, and at least one core includes at least one magnetism generating end disposed at the magnetic field air gap and a magnetic flux section coupled to the magnetism generating end, and the cores also includes at least one air gap opening, such that the air gap opening changes the path and direction of the magnetic lines and provides a variable air gap according to the magnetic field air gap, so as to improve the electric functions of the electric component.Type: GrantFiled: November 16, 2005Date of Patent: June 26, 2007Assignee: Jung Fong Electronics Co., Ltd.Inventor: Mu-Tu Lee
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Patent number: 7199696Abstract: The present invention is directed to a transformer having a stacked core, which includes top and bottom yokes and first and second outer legs. The core also includes an inner leg that is formed from a pair of stacked plates, which abut each along a seam that extends in the longitudinal direction of the inner leg. Each of the upper and lower yokes may be formed from a single stack of plates, or a plurality of stacks of plates. Each of the inner and outer legs may also be formed from a single stack of plates, or a plurality of stacks of plates. The cross-section of the core may be rectangular or cruciform.Type: GrantFiled: March 30, 2005Date of Patent: April 3, 2007Assignee: ABB Technology AGInventors: William E. Pauley, Jr., Charlie H. Sarver, Rush B. Horton, Jr.
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Patent number: 7170386Abstract: An inductor core 10 is proposed for a heatable godet roll comprising a plurality of inductor core laminations 11 arranged radially in a star shape with radial sections 12 and respectively one outer axial section 13 and an inner axial section. The inductor core 10 has end plates 19, 20 with respectively one surface 21 complementary to the radial sections 12 and fixing means, wherein the inductor core laminations 11 are arranged between the end plates 19, 20 and wherein the fixing means 22 are set up to fix the inductor core laminations 11 at their radiation sections 12 on the end plates 19, 20 or alternatively and/or on the outer surface of an inner tube.Type: GrantFiled: June 30, 2005Date of Patent: January 30, 2007Assignee: Schärer Schweiter Mettler AGInventors: Klaus Meier, Thomas Digel, Roland Reiber
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Patent number: 7148782Abstract: An energizable magnetic core for use in an inductor or a transformer includes a plurality of legs extending from the back yoke. The back yoke is formed in a loop arranged to provide a magnetic circuit. Each of the plurality of legs have a first end adjacent to the back yoke and a second end extending away from the back yoke. With the legs positioned upon the back yoke, a cover yoke is positioned adjacent to the second end of each of the plurality of legs. The cover yoke is also formed in a loop such that the cover loop is arranged to provide a magnetic circuit. Coils are positioned upon the legs of the energizable magnetic core. In one embodiment, amorphous metal may be used to construct the energizable magnetic core.Type: GrantFiled: April 26, 2004Date of Patent: December 12, 2006Assignee: Light Engineering, Inc.Inventor: Andrew Hirzel
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Patent number: 7138896Abstract: Ferrite cores are provided with rounded, convex head ends and complimentary rounded, concave tail ends. The configuration of the head and tail ends permits a reduction in gap width between adjacent cores when they are joined together into a core assembly that suppresses electromagnetic interference emitted from a cable.Type: GrantFiled: June 29, 2004Date of Patent: November 21, 2006Assignee: International Business Machines CorporationInventors: Jessica Rose Berens, Don Alan Gilliland, Amanda Elisa Ennis Mikhail
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Patent number: 7138188Abstract: A magnetic ribbon or sheet is coated with an electrical insulator prior to formation of a magnetic implement. Manufacture of the magnetic implement is accomplished in a single process without a need for co-winding magnetic and insulator ribbons. Thermal property differences between the magnetic material and the insulator operate during heat treatment to enhance magnetic property modification of the implement.Type: GrantFiled: June 2, 2005Date of Patent: November 21, 2006Assignee: Metglas, Inc.Inventors: Ryusuke Hasegawa, Carl Eugene Kroger
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Patent number: 7120993Abstract: On a surface of a glass cloth adhered a mica layer sheet, a mixture of inorganic particles having a thermal conductivity of at least 5 W/mK, a resin, and a solvent is applied to form a layer of the mixture of the inorganic particles, the resin, and the solvent; the layer of the mixture is reduced in thickness using a doctor blade, followed by pressurizing to form a high thermally conducting layer; the mica layer sheet on which the high thermally conducting layer is disposed is cut to obtain a mica insulating tape; and the mica insulation tape is wound around a coil conductor. As a result, an insulated coil that is excellent in the voltage endurance characteristics and has a high thermal conductivity is manufactured.Type: GrantFiled: June 8, 2004Date of Patent: October 17, 2006Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Shigeyuki Yamamoto, Wataru Bito, Toshio Isooka, Koichi Goshima
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Patent number: 7098767Abstract: The present invention includes an element for use in an inductive coupler in a downhole component. The element includes a plurality of ductile, generally U-shaped leaves that are electrically conductive. The leaves are less than about 0.0625? thick and are separated by an electrically insulating material. These leaves are aligned so as to form a generally circular trough. The invention also includes an inductive coupler for use in downhole components, the inductive coupler including an annular housing having a recess with a magnetically conductive, electrically insulating (MCEI) element disposed in the recess. The MCEI element includes a plurality of segments where each segment further includes a plurality of ductile, generally U-shaped electrically conductive leaves. Each leaf is less than about 0.0625? thick and separated from the otherwise adjacent leaves by electrically insulating material. The segments and leaves are aligned so as to form a generally circular trough.Type: GrantFiled: March 25, 2004Date of Patent: August 29, 2006Assignee: IntelliServ, Inc.Inventors: David R. Hall, H. Tracy Hall, Jr., David S. Pixton, Scott Dahlgren, Joe Fox, Cameron Sneddon
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Patent number: 7091810Abstract: An element for an inductive coupler in a downhole component comprises magnetically conductive material, which is disposed in a recess in annular housing. The magnetically conductive material forms a generally circular trough. The circular trough comprises an outer generally U-shaped surface, an inner generally U-shaped surface, and two generally planar surfaces joining the inner and outer surfaces. The element further comprises pressure relief grooves in at least one of the surfaces of the circular trough. The pressure relief grooves may be scored lines. Preferably the pressure relief grooves are parallel to the magnetic field generated by the magnetically conductive material. The magnetically conductive material is selected from the group consisting of soft iron, ferrite, a nickel iron alloy, a silicon iron alloy, a cobalt iron alloy, and a mu-metal. Preferably, the annular housing is a metal ring.Type: GrantFiled: June 28, 2004Date of Patent: August 15, 2006Assignee: IntelliServ, Inc.Inventors: David R. Hall, Joe Fox
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Patent number: 7088212Abstract: A transformer having variable reluctance, that controls the amount of power conveyed from an input to a load, based on a value selected by a computer control. The load power is varied by controlling the section and air gap between two parallel iron cores and a magnetic reluctance shifter positioned between the cores to vary the magnetic reluctance. The shifter is rotated by a motor. The position of the shifter varies the reluctance of the transformer and thus varies the amount of voltage transmitted from the primary winding to the secondary winding of the transformer. The iron core transformer is mounted in a non-magnetic frame and the windings are made from insulated braided copper strips, or insulated twisted cable.Type: GrantFiled: November 15, 2005Date of Patent: August 8, 2006Inventor: Lorenzo Zannini
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Patent number: 7084731Abstract: An iron core includes an electromagnetic steel plate having a first region on the surface of which an insulating film is formed and a second region which is not covered with the insulating film and exposed, and a coating member which coats at least the second region. The second region is formed by removing the insulating film by machining.Type: GrantFiled: March 26, 2004Date of Patent: August 1, 2006Assignee: Canon Kabushiki KaishaInventor: Hiroyoshi Kubo
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Patent number: 7082674Abstract: A rectangular single coil of a coil unit for a linear motor is fabracated by winding a single conductive wire. A winding former having locks for a conductive wire at positions corresponding to vertices of the rectangular single coil is rotated by 180 degrees about an X-axis, by 180 degrees about a Y-axis, alternately by first and second rotating mechanisms. Thereby, a single conductive wire fed out in the direction of a Z-axis from a conductive wire feeding out machine is wound while locked to the locks of the winding former in succession.Type: GrantFiled: October 6, 2003Date of Patent: August 1, 2006Assignee: Sumitomo Heavy Industries, Ltd.Inventors: Hidehiko Mori, Yasushi Koyanagawa, Yoshiyuki Tomita