Ventilating Passages (e.g., By Coil Section Or Core Part Spacers) Patents (Class 336/60)
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Patent number: 6575893Abstract: 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. Additionally, the magnetic field applicator is composed of a magnetic yoke having two parallel vertical yoke elements of identical geometry spaced apart a distance from each other, and two transverse yoke elements disposed between said vertical yoke elements. The pole shoes, surrounded by disk-shaped magnetic coils, are attached to the center of said transverse yoke elements and oppose each other over a prescribed distance.Type: GrantFiled: January 18, 2001Date of Patent: June 10, 2003Assignee: MFH Hyperthermiesysteme GmbHInventor: Peter Feucht
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Patent number: 6563411Abstract: A current transformer for alternating current with direct current components is proposed, consisting of at least one transformer core with a primary winding and at least one secondary winding to which a burden resistor is connected in parallel and terminates a secondary circuit with low resistance. The transformer core comprises a closed ring core with no air gap produced from a strip made of an amorphous ferromagnetic alloy that is practically free from magnetostriction and has permeability &mgr;<1400. Particularly appropriate alloys for such a strip ring core have been shown to be cobalt-based alloys consisting essentially of the formula Coa(Fe1-xMnx)bNicXdSieBfCg. where X is at least one of the elements V, Nb, Ta, Cr, Mo, W, Ge and P, a-g are given in atomic % and whereby a, b, c, d, e, f, g and x satisfy the following conditions: 40≦a≦82; 2≦b≦10; 0≦c≦30; 0≦d≦5; 0≦e≦15; 7≦f≦26; 0≦g≦3; with 15≦d+e+f+g≦30 and 0≦x<1.Type: GrantFiled: May 4, 2001Date of Patent: May 13, 2003Assignee: Vacuumschmelze GmbHInventors: Detlef Otte, Joerg Petzold
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Patent number: 6563410Abstract: A small footprint power transformer constructed so as to exhibit improved heat dissipation characteristics and an enhanced flow of a cooling medium. The transformer construction achieves small footprint by superimposing the core legs with the windings in vertical relationship. Highly heat conductive plane dissipators are inserted between adjacent finished coil discs and extended beyond the winding structure, terminating in fins arranged to assure maximum heat transfer to a cooling medium flowing therepast resulting in substantial reduction of the temperature rise.Type: GrantFiled: November 16, 2000Date of Patent: May 13, 2003Inventor: Louis L. Marton
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Patent number: 6549110Abstract: A compensating device suitable for use in railway car transformers has at least one compensation receptacle in fluid communication connection with the interior of the housing of a transformer and having a fluid volume. A separating element limits the fluid volume in the compensation receptacle. When a change occurs in the fluid volume in the compensation receptacle, the separating element is subject to a change in position. The separating element is designed in the form of a roll-over membrane. The circumferential edge of the membrane is connected to the side walls of the compensation receptacle at a distance form the bottom of the receptacle in a sealing manner. The connection is such that the roll-over membrane, in its rolled-up state, has a position in which it allows for the largest amount of fluid volume by substantially extending in one plane at a distance form the bottom.Type: GrantFiled: March 29, 2001Date of Patent: April 15, 2003Assignee: Hydac Technology GmbHInventor: Herbert Baltes
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Patent number: 6515850Abstract: The present invention relates to a power supply control module for loads or motors, which is mounted as an addition under a main electromagnetic switch appliance (Ap) and having, in a casing (1), current paths with commutating poles controlled by an electromagnet control device and substantially characterized by the fact that it includes at the rear, means (21, 22, 23, 31, 32) capable of channelling gases flowing out of the breaker chambers of the main appliance (Ap).Type: GrantFiled: July 3, 2001Date of Patent: February 4, 2003Assignee: Schneider Electric Industries SAInventors: Bernard Fournier, Xavier Person, Jean-Marc Romillon
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Patent number: 6369680Abstract: The invention relates to a mid-frequency high power transformer which is specially used as a welding transformer in resistance welding, comprising a primary winding penetrated by the limb of a transformer core and a secondary winding which are configured as concentrically overlapping cylindrical windings. The windings of the primary windings are formed by a plurality of spirally wound layers of a relatively thin electrically conductive metal strip material, and the windings of the secondary winding are formed by an appropriate number of spirally wound layers of a thicker electrically conductive metal strip material chosen according to the desired reduction ratio between the primary and the secondary windings.Type: GrantFiled: October 27, 1999Date of Patent: April 9, 2002Assignee: Expert Maschinenbau GmbHInventors: Rainer Brinckmann, Steffen Otto
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Patent number: 6278354Abstract: A planar electromagnetic device, such as a planar transformer or planar inductor, is provided with features for cooling that are formed integrally with the windings of the planar device. In a preferred embodiment the planar device uses winding layers (200) having fin portions (116). In a first alternative embodiment a helical winding (500) is formed from a winding stamping (400) having fin portions (412). In a second alternative embodiment, tube portions (802) are formed in a winding stamping (700) used to form a helical winding.Type: GrantFiled: August 4, 2000Date of Patent: August 21, 2001Assignee: Motorola, Inc.Inventor: James Roger Booth
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Patent number: 6278353Abstract: A planar magnetic device including a planar conductive winding and planar cooling element is disclosed. The planar cooling element includes a number of cooling layers some of which may have apertures therein to create a passage that accommodates fluid flow. In operation, coolant is pumped through the passage of the planar cooling element to remove heat from the planar magnetic device.Type: GrantFiled: November 16, 1999Date of Patent: August 21, 2001Assignee: Hamilton Sundstrand CorporationInventors: Robert S. Downing, Gregory I. Rozman
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Patent number: 6268786Abstract: The magnetic core of an inductive device is formed of a plurality of wires that extend through the inductive device, and beyond the electric windings. The ends of the wires are formed around the electric windings, meet, and are connected together enveloping the magnetic core and windings forming a complete magnetic circuit. The inductive device may be a transformer with two or more windings, a choke coil with only one winding, or other inductive device. The electric windings may be wound directly onto the wire magnetic core, or may be formed separately and then placed on the magnetic core. A mounting post or the like may be bound into the core and used as a mount for the inductive device; and, cooling tubes and/or large rods for support may be incorporated into the core.Type: GrantFiled: May 10, 1999Date of Patent: July 31, 2001Inventor: Harrie R. Buswell
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Patent number: 6255633Abstract: An electrophotography fixing device has a heating roller and an induction heating device. In order to improve heat resistance, heat radiating performance and insulation performance and in order to appropriately uniformly heat the heating roller, in the induction heating device, induction heating coils wound onto a core are fixed by varnish mixed with mica, and the outside surfaces thereof are fixed by a heat resistant bundling band or a molded body of a heat resistant material, or coated with a heat resistant, insulating and thermal conductive sheet. Alternatively, the same sheets as the above described sheet are provided between the core and the coils and between the layers of the coils. In addition, the core is formed with a hole extending in axial directions or holes extending in directions perpendicular to the axial directions. Moreover, the coils are doubly insulated.Type: GrantFiled: December 28, 1999Date of Patent: July 3, 2001Assignee: Toshiba Tec Kabushiki KaishaInventors: Osamu Takagi, Satoshi Kinouchi
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Patent number: 6239681Abstract: The core for an induction coil is formed of a plurality of parallel wires that extend through the induction coil, and beyond the coil. The ends of the wires are formed around the induction coil, and the ends of the wires meet and are connected to form a complete magnetic circuit. The induction coil may be a transformer with two or more windings, or a choke coil with only one winding, or other induction coil. The electric winding may be wound directly onto the wire core, or may be formed separately and then placed on the core. A stud or the like may be bound into the core and used as a mount for the induction coil; and, cooling tubes and large rods for support may be incorporated into the core.Type: GrantFiled: November 30, 1998Date of Patent: May 29, 2001Inventor: Harrie R. Buswell
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Patent number: 6160464Abstract: A dry-type transformer having an iron core, with high voltage and low voltage coils encapsulated in casting resin. The high and low voltage windings may be cast separately, or together. Either or both of the coils may have integral axial cooling channels, as may the annular axial space between the inner and outer windings (usually low voltage and high voltage, respectively). Coil cross-section is a modified oval (Rectoval.TM.) shape, in that the sides of the coil are substantially linear and the ends of the coils are substantially semi-circular. The aspect ratio (L/W) of the coil, when viewed in radial cross-section, ranges from greater than 1.0 to about 2.5. The rectangular nature of the coil allows for the use of a core member having a rectangular cross-section, thereby reducing the manufacturing expense involved with shaping the core member. The circular nature of the ends of the coil provide improved strength similar to that of circular/cylindrical coils.Type: GrantFiled: November 12, 1998Date of Patent: December 12, 2000Assignee: Dynapower CorporationInventors: Peter William Clarke, George Scott Hood, Alan Scott Gould
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Patent number: 6157282Abstract: This invention relates to a cooling system for a transformer. A winding defining a coil, including a duct having an open top and bottom, is sealed to a sleeve, thus forming a closed circulatory path. A fluid is retained and circulated within the circulatory path.Type: GrantFiled: December 29, 1998Date of Patent: December 5, 2000Assignee: Square D CompanyInventor: Philip J. Hopkinson
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Patent number: 6154019Abstract: A controllable inductor comprises at least a tubular core, a main winding (1) surrounding the core and a control winding (3) passing substantially axially through the core. It is adapted for connection to a three phase alternating current network and has for this sake for each phase (14-16) a main winding (1) for connection to the phase, a core and a control winding, and the control windings of the three phases are electrically connected in series to each other.Type: GrantFiled: November 12, 1998Date of Patent: November 28, 2000Assignee: ABB ABInventors: Stefan Valdemarsson, Lars Liljestrand
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Patent number: 6147580Abstract: An improved low voltage winding for dry insulated transformer has its windings resin encapsulated. The winding is constructed with flexible sheet conductors wound coincident with an insulating sheet material. Insulating spacers provide a means to form air channels in the windings during the coil forming process. A sealant is applied to openings at the lower ends and along vertical seams of the coil prior to the resin impregnation and encapsulation process. This will prevent drainage of the resin during a curing cycle. The result is a coil that exhibits high short circuit protection due to the tightly bond sheet conductors which will prevent movement of the conductors during short circuit conditions and also increases the radial compressive strength of the coil.Type: GrantFiled: December 29, 1998Date of Patent: November 14, 2000Assignee: Square D CompanyInventors: Richard Raymond Rettew, Scott Frederick Lett, Philip John Hopkinson
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Patent number: 6072166Abstract: In a method of operating an inductor of a tapping device of a melt vessel, the inductor couples inductively during a working phase with an electrically conductive shaped component and is cooled by means of a fluid. The inductor is electrically decoupled and cooled by means of a fluid in another working phase.Type: GrantFiled: June 30, 1999Date of Patent: June 6, 2000Assignee: Didier-Werke AGInventors: Raimund Bruckner, Daniel Grimm, Steve Lee
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Patent number: 6051822Abstract: In a method of operating an inductor of a tapping device of a melt vessel, the inductor couples inductively during a working phase with an electrically conductive shaped component and is cooled by means of a fluid. The inductor is electrically decoupled and cooled by means of a fluid in another working phase.Type: GrantFiled: August 28, 1996Date of Patent: April 18, 2000Assignee: Didier-Werke AGInventors: Raimund Bruckner, Daniel Grimm, Steve Lee
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Patent number: 6043472Abstract: In a method of operating an inductor of a tapping device of a melt vessel, the inductor couples inductively during a working phase with an electrically conductive shaped component and is cooled by means of a fluid. The inductor is electrically decoupled and cooled by means of a fluid in another working phase.Type: GrantFiled: April 24, 1998Date of Patent: March 28, 2000Assignee: Didier-Werke AGInventors: Raimund Bruckner, Daniel Grimm, Steve Lee
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Patent number: 6037555Abstract: A rotary contact circuit breaker having a venting arrangement to vent gasses operated by a short circuit interruption to a location substantially above the load strap of the breaker whereby electrical components are not damaged by the gasses and ionized gasses from different phases are conveyed in discrete channels for a period exceeding the period during which ionization is present.Type: GrantFiled: January 5, 1999Date of Patent: March 14, 2000Assignee: General Electric CompanyInventors: Roger N. Castonguay, Dennis J. Doughty, Dean A. Robarge, Dave S. Christensen, James L. Rosen, Randall L. Greenberg, Stefan Kranz, Mark Culler, Thomas Papallo
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Patent number: 5973583Abstract: A core assembly for coil units and a method for producing the same which can suppress a raise of temperature are provided. A secondary core (21) made of a ferrite includes a pair of core members (25, 25) which are symmetrical with respect to each other and are adapted to be coupled to each other. Each core member (25) is provided in its coupling surface (44) with a groove or apertune (43). When the core members (25, 25) are coupled to each other, the integrated grooves (43, 43) define a flow path (40) adapted to flow a cooling medium in the secondary core (21). Thus, it is possible to form a flow path in a core made of a sintered material which is too hard to be worked.Type: GrantFiled: February 25, 1998Date of Patent: October 26, 1999Assignees: Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.Inventors: Kunihiko Watanabe, Toshiro Shimada
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Patent number: 5954988Abstract: A high voltage transformer of a microwave oven has a structure for radiating heat efficiently. The high voltage transformer comprises a core formed of a plurality of iron plates fixed together one after another, a coil wound on the core, and heat radiation fins disposed between the iron plates in such a manner that flange parts of the fins extend outwardly beyond an outer periphery of the core. The heat radiation fins are spaced from the iron plates so as not to be in contact with the iron plates, and are made of a high thermal conductivity material. Portions of the flange parts are bent to form air flow openings that conduct cooling air in close contact with the core.Type: GrantFiled: July 15, 1998Date of Patent: September 21, 1999Assignee: Samsung Electronics Co., Ltd.Inventor: Sung-ho Lee
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Patent number: 5936503Abstract: A controllable inductor including a tubular core, a main winding (1) surrounding the core, a control winding running substantially axially to the core and an element (3) surrounding the core and arranged to support the main winding wound outside thereof in radial layers. The element includes means arranged to provide channels (19) partly defined by the radially inner turn of the main winding. Said channels are communicating with spacings between said layers (2). A member is arranged to generate a flow of air in the channels and through the spacings of the layers for cooling the main winding.Type: GrantFiled: July 18, 1997Date of Patent: August 10, 1999Assignee: Asea Brown Boveri ABInventors: Tommy Holmgren, Bjorn Sandin, Stefan Valdemarsson, Dan Elofsson
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Patent number: 5929599Abstract: An inductive coupling apparatus charges a storage device in an electric car by means of an external power source apparatus. The inductive coupling apparatus includes a coil unit assembly comprising a primary coil unit (10) and a secondary coil unit (20). The primary and secondary coil units (10, 20) comprise primary and secondary coils (12, 22) and primary and secondary cores (11, 21) for supporting the respective coils (12, 22). Spacers (13, 23) are mounted on arms (11A, 21A) of the cores (11, 21) of the units (10, 20) so that the coils (12, 22) are spaced apart from the peripheral surfaces of the arms (11A, 21A), thereby forming gaps (11D, 21D) between the arms (11A, 21A) and the coils (12, 22) to flow a cooling medium such as air therebetween. When the coils (12, 22) radiate a heat upon charging, the cooling media which flow in the gaps (11D, 21D) absorb the heat from the cores (11, 21).Type: GrantFiled: March 3, 1998Date of Patent: July 27, 1999Assignees: Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.Inventors: Kunihiko Watanabe, Toshiro Shimada
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Patent number: 5929737Abstract: A controllable inductor including at least one tubular core (10), a main winding (5) surrounding the core and a control winding (11) running substantially axially through said core and returning substantially axially outside thereof between said core and said main winding. The control winding is divided into a plurality of separate part control windings (12). The cross section of the part control windings is formed in a way that at least some adjacent part control windings inside the core are separated by means of a spacing (20, 26), which is at least partly defined by substantially parallel surfaces (16, 17) of these part control windings.Type: GrantFiled: July 18, 1997Date of Patent: July 27, 1999Assignee: Asea Brown Boveri ABInventors: Gunnar Zinders, Tommy Holmgren, Bjorn Sandin, Stefan Valdemarsson, Dan Elofsson
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Patent number: 5900795Abstract: A controllable inductor comprises at least a tubular core (13) a main winding (5) surrounding the core, a control winding (13) passing substantially axially through the core, a ground part (15) arranged inside the main winding and an element surrounding the core and adapted to carry the main winding wound outside thereof at a distance to the ground part while creating a voltage taking air gap between the main winding and this part. The main winding has a first end (10) thereof on high potential and the potential falls towards the second opposite end (11). The element carries the main winding at the first end (10) at a larger radial distance to the ground part than at the second end.Type: GrantFiled: October 27, 1997Date of Patent: May 4, 1999Assignee: Asea Brown Boveri ABInventors: Tommy Holmgren, Erik Jansson
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Patent number: 5898353Abstract: Convective cooling of a distribution transformer is enhanced by use of magnetic fluid which has a magnetically driven flow pattern in the form of a plurality of vertically stacked magnetic circulation cells with convective heat transfer being enhanced by modifying the configuration of a proximate transformer wall to facilitate the transfer of heat from the magnetic fluid to the wall and then to the ambient air.Type: GrantFiled: June 17, 1997Date of Patent: April 27, 1999Assignee: Electric Power Research InstituteInventors: Tahir Cader, Samuel Bernstein, Clayton Crowe
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Patent number: 5789712Abstract: A holder for a toroid coil has a planar top surface for engagement by a vacuum pickup and four side walls extending to a mounting plane and defining a toroid containing space therewithin. Wire wrap posts extend from one side of the holder and wire pass through openings enable the wire to hold the coil in place while permitting the solder connection location to lie outside the holder in view for inspection.Type: GrantFiled: July 19, 1996Date of Patent: August 4, 1998Assignee: Power Trends, Inc.Inventors: John Brett Barry, G. Russell Ashdown
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Patent number: 5736915Abstract: An electrical apparatus, such as a transformer, includes an expandable internal chamber that is nonventing and completely and permanently sealed from the ambient environment. The chamber houses a core and coil assembly or other current-carrying conductor and is completely filled with dielectric fluid having a pressure less than one atmosphere. The enclosure walls are flexible and are permitted to bow inwardly and outwardly as the volume of the dielectric fluid changes due to thermal expansion and contraction. A method of processing the dielectric fluid and filling and sealing the transformer at sub-atmospheric pressure is also disclosed.Type: GrantFiled: December 21, 1995Date of Patent: April 7, 1998Assignee: Cooper Industries, Inc.Inventors: Gary L. Goedde, Gary A. Gauger, John Lapp, James Vernon White, Alan Paul Yerges
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Patent number: 5660749Abstract: A transformer includes a stator core, primary coils, secondary coils, and heat radiating plates each of which projects outward from between interior layers of the primary coil and/or secondary coil. An A.C. arc welder includes the transformer therein, with a movable core which can move to and fro between the primary coils and secondary coils and which has different widths in the movable direction. An A.C. arc welder also includes openings for taking in air at a front portion of a case cover and a fan for exhausting air at a rear portion of the case cover.Type: GrantFiled: February 10, 1995Date of Patent: August 26, 1997Assignee: Yashima Electric Co., Ltd.Inventors: Toshio Taguchi, Teruo Okauchi, Tsuneaki Terashima
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Patent number: 5651175Abstract: A method of securing a flexible temperature sensing element to a duct spacer element of the type which is commonly used in an electrical transformer includes steps of forming a groove in a surface of duct spacer element; and securing a flexible temperature sensing element within the groove so that the flexible temperature sensing element does not protrude from the groove beyond the surface in which the groove is formed. In this way, the duct spacer element and sensing element may be assembled into an electrical apparatus such as a transformer without imparting destructive mechanical forces to the sensing element.Type: GrantFiled: June 6, 1995Date of Patent: July 29, 1997Assignee: ABB Power T&D Company Inc.Inventors: Jerry W. Grimes, Morris Gauldin, Robert H. Hollister
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Patent number: 5621372Abstract: A single phase, dry type transformer has an iron core, high voltage windings embedded in cast resin, and low voltage windings resin encapsulated. The low voltage winding is constructed with flexible sheet conductors. Insulating material includes a means to secure the windings in place during a vacuum and pressure resin impregnation process. The result is a coil that exhibits high short circuit protection due to the tightly bond conductors comparable to completely resin encased molded transformers at a substantially reduced cost.Type: GrantFiled: September 20, 1994Date of Patent: April 15, 1997Assignee: Square D CompanyInventor: Dilip R. Purohit
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Patent number: 5598137Abstract: In order to achieve improved mechanical properties for a coil (1), it is proposed to structure a first electroconductive winding (3) of the coil (1) as a coil former. This coil has a first connecting element (15), to which a second connecting element (17) is attached via an insulating part (25). The two connecting elements (15, 17) form the connections for the coil (1). In this way, a self-supporting coil structure is achieved. The coil (1) is particularly intended as an undervoltage winding with a low number of windings for cast resin transformers.Type: GrantFiled: September 26, 1994Date of Patent: January 28, 1997Assignee: Siemens AktiengesellschaftInventors: Friedrich Alber, Rudolf Dedelmahr, Siegfried Kromer, Hans Schott, Siegfried Weiss
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Patent number: 5594315Abstract: An inductive charging coupler for use in inductive charging apparatus for charging a battery. The charging coupler is insertable into a charge port that is coupled to the battery. The charge port comprises a housing, an opening into which the charging coupler is inserted, and a secondary core surrounded by secondary windings. The charging coupler comprises a housing, a primary core, a primary winding having an even number of primary turns disposed around the core, and a hollow coolant conducting heat exchanger symmetrically disposed between the primary turns of the primary winding. The heat exchanger is typically them tally bonded to the primary turns of the primary winding by means of heat conducting adhesive or epoxy. The coolant flow passages of the heat exchanger may be configured in several ways. One approach is to construct thin, flat, self-contained flexible bladders made of metal, such as copper.Type: GrantFiled: April 29, 1994Date of Patent: January 14, 1997Assignee: Delco Electronics CorporationInventors: Sergio Ramos, John T. Hall, Herbert J. Tanzer, William Quon
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Patent number: 5508672Abstract: A stationary reduction apparatus is arranged so that coil groups comprising plate type (or disc type) coils, which are stacked up in multiple layers with spacers inserted therebetween to traverse through a core whereby a refrigerant may pass through inter-layer clearances, are provided and divided into a plurality of coil sub-groups and every other coil sub-group of the divided coil sub-groups is surrounded by a refrigerant guide which is provided with an opening on its internal periphery and refrigerant flow ports on its external periphery, and the refrigerant is introduced into the refrigerant guide to flow in a horizontal direction through respective inter-layer clearances of the stacked-up coil groups, thereby the coil groups are effectively cooled without accelerating the velocity of refrigerant flow.Type: GrantFiled: April 6, 1995Date of Patent: April 16, 1996Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Katsuji Sokai
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Patent number: 5499185Abstract: The inductive charge coupler carrying the transformer primary is supplied with coolant fluid. The inductive charge receptacle mounted on the automobile has interior cooling fluid passages and there is a duct to transfer the cooling fluid from the inductive charge coupler to the cooling fluid passages in the inductive charge receptacle.Type: GrantFiled: November 2, 1993Date of Patent: March 12, 1996Assignee: Hughes Aircraft CompanyInventors: Herbert J. Tanzer, William Quon, John T. Hall
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Patent number: 5477007Abstract: The present invention is directed to a twisted conductor in which better use is made of the material and at the same time the structural dimensions are reduced. The partial conductor has a sharp bend so that the two partial conductor stacks are mutually parallel and leave a space between them. An intermediate piece is fitted in this space in the region of the bend. Thus there is a cooling channel in the twisted conductor for the radial flow of coolant. To ensure that the partial conductor bunch forms a coherent twisted conductor there is a casing in the region of the bend. This casing is a glass-cloth binding pre-impregnated with epoxy resin in the B state. Because of the improved filling factor, the structural height of the transformer can be reduced, resulting in the elimination of the paper insulation itself and the longitudinal intermediate pressboard layer. Moreover, the intermediate pieces can be thinner since there is no longer any need to allow for the expansion of the paper in the spacers.Type: GrantFiled: October 26, 1993Date of Patent: December 19, 1995Assignee: ASTA Elektrodraht GmbHInventor: Kurt Jagersberger
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Patent number: 5473302Abstract: An improved narrow profile transformer and method of making is disclosed comprising a primary winding and a secondary winding with the secondary winding being interleaved with the primary winding. The primary and secondary windings are spiral winding with all portions of the primary and secondary windings intersecting a geometric plane extending through the narrow profile transformer. The primary and secondary windings of the narrow profile transformer may be encapsulated within a polymeric material.Type: GrantFiled: July 25, 1994Date of Patent: December 5, 1995Assignee: Top Gulf Coast CorporationInventors: William E. Terlop, Serge Casagrande
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Multilayer separate windings of inductive charge coupler for automobile battery charging transformer
Patent number: 5463303Abstract: The primary windings and part of the magnetic circuit of an automobile battery charging transformer are mounted in a separable multiple panel inductive charge coupler which is insertable into and removable from corresponding inductive charge receptacle slots in the automobile adjacent the transformer secondary windings and magnetic structure. The use of thin primary and secondary coils decreases the resistance losses in the coils. When the inductive charge coupler is in place and is energized, the primary winding energizes the secondary winding to permit charging of the batteries on the automobile.Type: GrantFiled: November 2, 1993Date of Patent: October 31, 1995Assignee: Hughes Aircraft CompanyInventors: John T. Hall, Herbert J. Tanzer -
Patent number: 5455551Abstract: A method of securing a flexible temperature sensing element to a duct spacer element of the type which is commonly used in an electrical transformer includes steps of forming a groove in a surface of duct spacer element; and securing a flexible temperature sensing element within the groove so that the flexible temperature sensing element does not protrude from the groove beyond the surface in which the groove is formed. In this way, the duct spacer element and sensing element may be assembled into an electrical apparatus such as a transformer without imparting destructive mechanical forces to the sensing element. The disclosure also embraces an integrated temperature sensing duct spacer unit.Type: GrantFiled: May 11, 1993Date of Patent: October 3, 1995Assignee: ABB Power T&D Company Inc.Inventors: Jerry W. Grimes, Morris J. Gauldin, Robert H. Hollister
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Patent number: 5448215Abstract: A stationary reduction apparatus is arranged so that coil groups comprising plate type (or disc type) coils, which are stacked up in multiple layers with spacers inserted therebetween to traverse through a core whereby a refrigerant may pass through inter-layer clearances, are provided and divided into a plurality of coil sub-groups and every other coil sub-group of the divided coil sub-groups is surrounded by a refrigerant guide which is provided with an opening on its internal periphery and refrigerant flow ports on its external periphery, and the refrigerant is introduced into the refrigerant guide to flow in a horizontal direction through respective inter-layer clearances of the stacked-up coil groups, thereby the coil groups are effectively cooled without accelerating the velocity of refrigerant flow.Type: GrantFiled: March 15, 1994Date of Patent: September 5, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Katsuji Sokai
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Patent number: 5444426Abstract: A stationary reduction apparatus is arranged so that coil groups comprising plate type (or disc type) coils, which are stacked up in multiple layers with spacers inserted therebetween to traverse through a core whereby a refrigerant may pass through inter-layer clearances, are provided and divided into a plurality of coil sub-groups and every other coil sub-group of the divided coil sub-groups is surrounded by a refrigerant guide which is provided with an opening on its internal periphery and refrigerant flow ports on its external periphery, and the refrigerant is introduced into the refrigerant guide to flow in a horizontal direction through respective inter-layer clearances of the stacked-up coil groups, thereby the coil groups are effectively cooled without accelerating the velocity of refrigerant flow.Type: GrantFiled: October 31, 1994Date of Patent: August 22, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Katsuji Sokai
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Patent number: 5438182Abstract: A choke coil apparatus for an electromagnetic range comprises an improved ferrite core, so as to prevent an increasing in temperature of the choke coil. The ferrite core in a multiangular bar-shape forms a plurality of ventilation spaces between the choke coil and the ferrite core, thereby air-cooling the choke coil by the air flowing in the ventilation space.Type: GrantFiled: August 24, 1992Date of Patent: August 1, 1995Assignee: Gold Star Co., Ltd.Inventor: Byoung T. Choi
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Patent number: 5412304Abstract: The primary winding and part of the magnetic circuit of an automobile battery charging transformer are mounted in a separable inductive charge coupler which is insertable into and removable from an inductive charge receptacle slot in the automobile adjacent the transformer secondary winding and magnetic structure. When the inductive charge coupler is in place and is energized, the primary winding energizes the secondary winding to permit charging of the batteries on the automobile. The inductive charge coupler is cooled by a fluid passage therein. The coolant may be a gas which is vented or may be a liquid which is circulated.Type: GrantFiled: August 9, 1993Date of Patent: May 2, 1995Assignee: Hughes Aircraft CompanyInventor: Russell M. Abbott
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Patent number: 5408209Abstract: A transformer is used to charge the battery of an electric automobile. The primary of the transformer is connected to a fixed power supply and is separable from a secondary mounted in the automobile. The secondary is cooled by cooling structure mounted on the secondary, particularly a heat pipe.Type: GrantFiled: November 2, 1993Date of Patent: April 18, 1995Assignee: Hughes Aircraft CompanyInventors: Herbert J. Tanzer, William Quon, Sergio Ramos
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Patent number: 5396210Abstract: A dry type transformer has an iron core, high voltage windings embedded in cast resin, and low voltage windings resin encapsulated. The low voltage winding is constructed with flexible sheet conductors. Insulating material includes an apparatus to secure the windings in place during a vacuum and pressure resin impregnation process. The result is a coil that exhibits high short circuit protection due to the tightly bond conductors comparable to completely resin encased molded transformers at a substantially reduced cost.Type: GrantFiled: March 17, 1993Date of Patent: March 7, 1995Assignee: Square D CompanyInventors: Dilip R. Purohit, Timothy A. Soter, Jeewan Puri
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Patent number: 5376911Abstract: A choke coil comprises mutually similar flat bars which are electrically connected at the corners. Each coil winding comprises an integral number of mutually similar flat bars which in each case lie on top of one another on contact areas at the corners so as to overlap over a large area. Insulating plates and/or insulating layers having a size approximately equal to the contact area are provided between two adjacent windings at the corners. The stack formed in this way is held together exclusively by means of a clamping device comprising clamping elements which do not cut or pierce the flat bars. A choke constructed in this manner is simple and economical to manufacture can be cooled well and can be produced in virtually any size.Type: GrantFiled: July 30, 1993Date of Patent: December 27, 1994Assignee: Asea Brown Boveri Ltd.Inventor: Sven-Einar Stenkvist
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Patent number: 5367760Abstract: An improved narrow profile transformer and method of making is disclosed comprising a primary winding and a secondary winding with the secondary winding being interleaved with the primary winding. The primary and secondary windings are spiral winding with all portions of the primary and secondary windings intersecting a geometric plane extending through the narrow profile transformer. The primary and secondary windings of the narrow profile transformer may be encapsulated within a polymeric material.Type: GrantFiled: April 26, 1993Date of Patent: November 29, 1994Inventors: William E. Terlop, Serge Casagrande
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Patent number: 5365211Abstract: A magneto repulsion electrical tape wound coil has been developed with improved current distribution and improved heat transfer. The coil is easy and is expensive to manufacture and simple to mount. The coil comprises a conductive strip (e.g., a copper strip) with rectangular openings stamped in it with a standard metal stamp. The single row of openings are at regular intervals and arranged so that the width of the openings and the spacing of the openings is such that when the coil is wound there is an overlap of the openings, forming radial passages extending from the outer periphery of the coil to its central core electrode. Cooling fluid may be supplied from a hollow inner electrode so that the cooling fluid flows radially, outwardly. Since the openings overlap to form radial passages, a cross-flow path for the cooling fluid may be established where fluid enters the passages on one side of the coil and exits from the other side of the coil.Type: GrantFiled: December 18, 1992Date of Patent: November 15, 1994Assignee: International Business Machines CorporationInventors: William D. Carbaugh, Jr., David C. Long, Karl F. Stroms
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Patent number: 5296829Abstract: A core-form transformer winding with liquid coolant flow diversion bands is disclosed. The apparatus includes a winding tube with a central longitudinal axis. A number of coil sections are axially displaced along the central longitudinal axis of the winding tube. Radial ducts are formed between the coil sections. Internal vertical ducts are formed within each of the coil sections. A liquid coolant is used to cool the windings during operation. Flow diversion bands are placed around every other coil section. The flow diversion bands generate a partial blockage of the liquid coolant, which produces a radial flow into one or more of the radial ducts, resulting in vertical flow through the internal vertical ducts.Type: GrantFiled: November 24, 1992Date of Patent: March 22, 1994Assignee: Electric Power Research Institute, Inc.Inventors: Richard E. Kothmann, Donald K. Whirlow
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Patent number: 5296828Abstract: A tape wound coil is provided, for use in magnetic repulsion punching, that has a plurality of slits therein which allow circulation of coolant therethrough. This coil is made of thin copper foil, or the like that is treated with an epoxy, for electrical insulation between the windings, and then wound around a center post. The face of the coil is machined smooth, whereas a counter bore is machined into the back of the coil such that a portion of the center post and the inner most windings are removed. Radial slits are then machined into the back of the coil, which will allow for the coolant flow. Thus, a coil for use in magnetic repulsion punching is provided which maximizes the capacity for carrying electrical current and increases the winding density exhibited by conventional M-R coils. Further, the coil of the present invention will withstand high repetition mechanical shear forces created as a result of the large amount of electrical current pulsing through the windings.Type: GrantFiled: August 9, 1991Date of Patent: March 22, 1994Assignee: International Business Machines CorporationInventors: Paul Feinstein, Jr., Robert N. Price, Verlon E. Whitehead, John A. Williamson