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Inductor devices

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Class / Patent application numberDescriptionNumber of patent applications / Date published
336199000 COIL OR COIL TURN SUPPORTS OR SPACERS 407
336192000 WINDING WITH TERMINALS, TAPS, OR COIL CONDUCTOR END ANCHORING MEANS 173
336090000 WITH OUTER CASING OR HOUSING 119
336055000 WITH TEMPERATURE MODIFIER 107
336221000 COIL AND CORE 102
336180000 WINDING FORMED OF PLURAL COILS (SERIES OR PARALLEL) 56
336083000 CORE FORMS CASING 56
336084000 WITH ELECTRIC AND/OR MAGNETIC SHIELDING MEANS 54
336065000 WITH MOUNTING OR SUPPORTING MEANS (E.G., BASE) 54
336170000 THREE OR MORE WINDINGS 52
336212000 PLURAL PART CORE 52
336233000 CORE (E.G., COMPRESSED POWDER) 45
336220000 TWO WINDINGS 42
336225000 COILS OF SPECIAL CONFIGURATION 40
336196000 WITH SUPPORTING AND/OR SPACING MEANS BETWEEN COIL AND CORE 37
336005000 POLYPHASE 35
336105000 COMBINED 35
336222000 WINDINGS 33
336115000 RELATIVELY MOVABLE COILS 19
336137000 WITH MEANS TO CHANGE COIL LENGTH OR CONNECTIONS 14
336178000 WITH CLOSED CORE INTERRUPTED BY AN AIR GAP 13
336110000 WITH PERMANENT MAGNET 12
336130000 RELATIVELY MOVABLE CORE AND COIL 10
336175000 CORE SURROUNDING LINEAR CONDUCTOR 8
336213000 WOUND CORE 8
336177000 WITH COIL OR MAGNETIC MATERIAL 7
336210000 WITH CORE CLAMPS, WEDGES OR FASTENERS 7
336173000 INTERLINKED COILS OR WINDINGS (E.G., CURRENT TRANSFORMER) 7
336188000 TWO WINDINGS WITH MUTUALLY CROSSED WINDING TURNS 6
336030000 WITH CONDITION-RESPONSIVE INDUCTANCE ADJUSTING MEANS (E.G., BY ELECTROMAGNET) 6
336155000 INDUCTIVE REGULATORS WITH NO RELATIVELY MOVING PARTS 5
20080266041HIGH CURRENT LOW-PROFILE CURRENT CHOKES SUITABLE FOR USE IN DC TO DC CONVERTERS - According to various aspects, exemplary embodiments are provided of current chokes suitable for use in DC to DC converters. For example, a current choke may include a ferrite body with at least one pair of laterally spaced-apart interior conductors disposed lengthwise within the body. A first pair of end terminations may be disposed on a first end of the body and connected to the interior conductors, and a second pair of end terminations may be disposed on a second end of the body and connected to the interior conductors. A nonmagnetic dielectric may be disposed within the body laterally between the interior conductors. The nonmagnetic dielectric may be configured to control magnetic coupling between the at least one pair of interior conductors so that the current choke is operable with a coefficient of magnetic coupling between the interior conductors of less than about 0.90.10-30-2008
20080284550Variable Inductor - A variable inductor according to the present invention includes a control winding, two windings constituting a primary winding, and a magnetic core. The magnetic core includes a center leg and two outer legs disposed so as to sandwich the center leg, wherein the control winding is disposed around the center leg, and the two winding as the primary winding are disposed around the two outer legs, respectively. The control winding is shifted in location with respect to the two winding as the primary winding in the longitudinal direction of the legs thereby providing a sufficient spatial isolation therefrom, thus ensuring a sufficient withstand voltage between the control winding and the primary winding.11-20-2008
20080315982COUPLED-INDUCTOR CORE FOR UNBALANCED PHASE CURRENTS - An embodiment of a coupled-inductor core includes first and second members and first and second forms extending between the first and second members. The first form has a parameter (e.g., length) of a first value, and is operable to conduct a first magnetic flux having a first density that depends on the first value of the parameter. The second form is spaced apart from the first form, has the parameter (e.g., length) of a second value different from the first value, and is operable to conduct a second magnetic flux having a second density that depends on the second value of the parameter. Because two or more of the forms of such a core may have different values for the same parameter, the core may be suitable for use in a multiphase power supply where the currents through the phases are unbalanced.12-25-2008
20110260819CONTINUOUSLY TUNABLE INDUCTOR WITH VARIABLE RESISTORS - An integrated tunable inductor includes a primary inductor having a plurality of inductor turns, at least one closed loop eddy current coil proximate the primary inductor, and at least one variable resistor integrated in series with the eddy current coil.10-27-2011
20130141202Core - A magnetic fault current limiter core (06-06-2013
336216000 CORE JOINT STRUCTURE 5
20080290983CORE ASSEMBLY, IN PARTICULAR FOR AN IGNITION COIL OF AN INTERNAL COMBUSTION ENGINE - 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.11-27-2008
20100085138CROSSED GAP FERRITE CORES - The invention relates to swinging inductors of a stepped-gap construction. We describe an inductor core structure having first and second core segments, constructed and arranged such that distal ends of legs of the first core segment are paired with distal ends of legs of the second core segment in an opposing relation. The at least one distal ends of the first core segment has a ridge projecting therefrom and is paired with the at least one distal ends of the second core segment which has a ridge projecting therefrom in an opposing relation, such that opposingly paired projecting ridges form a cross arrangement.04-08-2010
20090273431Lower cost continuous flux path transformer core and method of manufacture - In a continuous flux path transformer core, at least part of the core is implemented in non-grain oriented steel.11-05-2009
20080224813WIRE-WOUND COIL - A wire-wound coil includes a ferrite core having a winding core portion and flange portions, a wire wound around the winding core portion, electrodes connected to the wire on lower surfaces of the flange portions, and a ferrite plate attached to upper surfaces of both of the end flange portions so as to extend over the winding core portion. The flange portions and the ferrite plate are provided with corresponding recessed and projecting portions and, and the flange portions and the ferrite plate are integrated through the recessed and projecting portions. Joint sections between the flange portions and the ferrite plate include contact sections that are in direct contact with each other, and adhesion sections arranged to receive an adhesive.09-18-2008
20110234359REACTOR AND METHOD FOR MANUFACTURING REACTOR - A reactor includes: a first core having end surfaces; a second core having end surfaces facing the end surfaces of the first core; coils wound around at least part of the circumference of the first core and the second core; and gap members arranged between the end surfaces of the first core and the end surfaces of the second core. The coils and the gap members are integrally molded with a first resin in a state where the first and second cores are not provided. The coils and the first and second cores are integrally molded with a second resin in a state where the gap members are sandwiched between the end surfaces of the first core and the end surfaces of the second core.09-29-2011
336189000 COIL WITH CROSSED TURNS 3
20110148558INDUCTOR - An inductor includes a conductive track forming at least three inductor turns. The conductive track has a plurality of track sections. The inductor also includes at least two groups of crossing points, each crossing point comprising a location at which the conductive track crosses over itself. The crossing points of each group collectively reverse the order of at least some of the track sections in the inductor, such that inner track sections of the conductive track cross over to become respective outer track sections, and such that outer track sections of the conductive track cross over to become respective inner track sections.06-23-2011
20110090035COIL - In the winding wire at the winding completion end side, two wires are piled up vertically and wound together from the inner circumferential side towards the outer circumferential side. The winding wire at the winding start end side that has remained on the inner circumferential side is drawn forth from the inner circumferential side to the outer circumferential side so as to form a curve along the flat surface of the coil. In the crossing portions of the winding wire at the winding completion end side and the winding wire at the winding start end side, the two wires of each winding wire are superimposed and caused to cross each other in a state in which the wires are laid down transversely.04-21-2011
20100328008DISC WINDING - A disc winding of a power transformer or a choke is provided. The disc winding includes a plurality of parallel single strand conductors. The working time for bending the strand conductors of cross-overs is reduced by sharing the winding axially in plurality of sections, and the cross-overs within a section are identical twin cross-overs. The the strand conductors are bent in two groups, and a standardized twin transposition cross-over is provided between the sections such that the strand conductors are being bent in two groups. The outermost strand conductor is in the first group, and the remaining strand conductors are in the other group.12-30-2010
336020000 WITH DEFORMABLE OR DISTORTABLE COIL AND/OR CORE 3
20120068801FLUIDIC CONSTRUCTS FOR ELECTRONIC DEVICES - In various embodiments, an inductance of an inductor is tuned by adjusting a position of a conductor and/or a magnetic material with respect to a conducting wire of the inductor, thereby changing the electro-magnetic characteristics of the conducting wire. The conductor and/or magnetic material can be disposed in a microfluidic channel and can be moved within the microfluidic channel using a suitable actuator mechanism.03-22-2012
20100253454BALUN FOR MAGNETIC RESONANCE IMAGING - An inductive component in the form of a balun for use in magnetic resonance imaging tomographs comprises a winding of a coaxial line. For adjusting inductance of the winding, a length of the winding of the coaxial line is deformable. For this, a first end of the coaxial line is fastened to a first fastening block, and a second end to a second fastening block. Change of the length is effected by means of an adjusting screw which varies the distance between the two fastening blocks.10-07-2010
20120081200Inductive Device - We describe an inductive device for use in current shaping applications. The inductive device includes a core body comprising a first gap and a second gap, and at least one transition region between the first and second gaps. The shape of each gap in the inductive device can control a slope between two inductance values as a function of load current. The inductive device is capable of providing low total harmonic distortion (THD) AC output waveforms to achieve high efficiency.04-05-2012
336073000 WITH CLOSED COIL OR CONDUCTOR MEMBER 3
20100066474CONTROL OF LEAKAGE INDUCTANCE - According to an embodiment, a transformer is provided that includes a first conductive coil wound about a first coil axis and a second conductive coil wound about a second coil axis. The second conductive coil is disposed proximate to the first conductive coil and the second coil axis is substantially parallel to the first coil axis. A closed-loop conductive winding is disposed proximate to the first conductive coil and the second conductive coil. The closed-loop conductive winding is wound about a loop axis at least one time where the loop axis is substantially parallel to the first coil axis and the second coil axis.03-18-2010
20100194510Inductive Electrical Device - An inductive electrical device according to an embodiment of the present invention including a core structure, wherein the core structure includes a synthetic antiferromagnet is disclosed.08-05-2010
20130176093COIL FOR CURRENT LIMITATION - The invention relates to an electric coil for current limitation in medium voltage networks and high voltage networks, for example an inductance coil, having a conductive coil wire which is wound to form a cylindrical coil, with the conductive coil wire being wound around a segment of a core which conducts a closed magnetic flux. The core is interrupted by at least one non-magnetizable gap with small thickness to reduce a saturation of the core even with high currents flowing through the electric gap.07-11-2013
336179000 COILS WITH TEMPERATURE COMPENSATING MEANS 2
20120256719HARMONIC MITIGATION DEVICES AND APPLICATIONS THEREOF - In one embodiment, the instant invention can provide an inductor that at least includes the following component(s): at least one FAP positioned along at least one magnetic flux path; where the at least one FAP is a high permeability core gap piece; and where the at least one FAP has an effective magnetic permeability that varies based on at least in part on one of the following factors: i) at least one magnetic flux through the at least one FAP, and ii) sufficient heating of the at least one FAP.10-11-2012
20130169398ANTENNA DEVICE AND COMMUNICATION DEVICE - An antenna device, capable of stable communications without increasing a space of the entire device by keeping a resonance frequency substantially constant even if the temperature changes, includes: an antenna circuit having an antenna coil with an electrically connected capacitor; the coil receiving a magnetic field transmitted from a reader/writer at a predetermined oscillation frequency; the circuit becoming communicable when inductively coupled to the reader/writer; and a magnetic sheet formed at a position superposed on the coil to change its inductance, wherein the coil has a temperature characteristic in which the inductance is changed with a temperature change, and the sheet has a temperature characteristic of changing the inductance to achieve a characteristic inverse to the inductance change with the temperature change in a predetermined use temperature range, and substantially matching a resonance frequency of the circuit with the oscillation frequency in the use temperature region.07-04-2013
336214000 MULTIPLE MAGNETIC PATHS 2
20130082814MULTI-WINDING MAGNETIC STRUCTURES - A parallel multi-winding magnetic structure includes a magnetic core defining a plurality of flux paths through the core and a plurality of windings extending around portions of the core. At least some of the windings are positioned adjacent a periphery of the structure. The structure further includes an electrical conductor extending along the periphery of the structure and the windings positioned adjacent the periphery of the structure.04-04-2013
20130076476POWER SUPPLY IMPROVEMENTS - A power supply apparatus which includes a transformer having a primary winding and a secondary winding, whereby magnetic flux generated by a varying primary voltage applied to the primary winding induces a varying secondary voltage on the secondary winding, a torroidal transformer core over which said primary winding and secondary winding are applied, and at least one magnetic shunt arranged to provide a diversion path for magnetic flux generated by the primary winding which diverts magnetic flux from the secondary winding.03-28-2013
336195000 COIL SUPPORTED WITHIN GROOVED OR HOLLOW COIL CONDUCTOR OF ANOTHER COIL 2
20130076472Super-thin Filter Structure - A super-thin filter structure mainly has a channel furnished in the iron core with a penetrating hole furnished in the middle section thereof; a truncated angle parts is furnished at the end angles of the iron core; a containing concave part for containing the iron core is furnished and a center seat having a penetrating hole is furnished at the center thereof for placing into the penetrating hole of the iron core; a wire-guiding channels is also furnished at the bottom of the base; an upper cover is placed into the channel, and a center salient part having a penetrating hole is capable of placing into the penetrating hole and touching the center seat making the upper cover to clip the iron core in coordination with the base; a wire-guiding channels together with the wire-guiding channels is capable of simultaneously providing the winding of a coil.03-28-2013
20120007708SOLID STATE ROTARY FIELD ELECTRIC POWER COGENERATION UNIT - A solid state rotary filed electric power cogeneration unit and method is disclosed for converting a portion of the flowing current (electrons) in the neutral leads of any alternating electric power system into usable electric power (energy) without negatively changing the power status of the primary or power side of the system and simultaneously effecting more efficient functioning of the neutral and/or ground neutral portion of the system by lowering the impedance.01-12-2012
336186000 COIL FORMED OF PARALLEL CONNECTED CONDUCTORS 2
20120092117CONDUCTOR WIRE FOR MOTOR AND COIL FOR MOTOR - The present application has a purpose to provide a conductor wire for motor capable of improving durability against bending, and a coil for motor using the conductor wire for motor. One aspect of the invention, therefore, provides a conductor wire for motor comprising a fine wire assembly and a coating member covering an outer peripheral surface of the fine wire assembly, the fine wire assembly consisting of a plurality of fine wires assembled in a bundle, and each of the fine wires including a conductor and an insulating part provided on an outer peripheral surface of the conductor, wherein the coating member is made of metal, and the coating member has an electrical resistance value larger than an electrical resistance value of the conductor.04-19-2012
20100231341HIGH FREQUENCY TRANSFORMER FOR HIGH VOLTAGE APPLICATIONS - A transformer comprises a primary winding having a first plurality of magnetic circuits each with a second plurality of turns and electrically connected in parallel and a secondary winding comprising a third plurality of magnetic circuits each with a fourth plurality of turns and electrically connected in series. The primary winding is electromagnetically coupled to the secondary winding by a single turn electrically conductive loop.09-16-2010
336082000 COIL FORMS PROTECTIVE CASING 2
20090128274INDUCTOR USING BULK METALLIC GLASS MATERIAL - Inductors using bulk metallic glass (BMG) material and associated methods are generally described. In one example, an apparatus includes an electrically conductive core material, an electrically insulative material coupled with the electrically conductive core material, and a magnetic bulk metallic glass (BMG) material coupled with the electrically insulative material, wherein the electrically conductive core material, the electrically insulative material, and the magnetic BMG material form an inductor.05-21-2009
20090051473METHODS AND APPARATUS FOR ELECTROMAGNETIC COMPONENTS - Methods and apparatus for electromagnetic components comprise a core and a winding. The core and winding are configured to provide smaller and more effective electromagnetic components.02-26-2009
336069000 WITH COIL CAPACITANCE MODIFYING MEANS 2
20090002111Wideband planar transformer - A method of arranging and fabricating parallel primary and secondary coils of a wideband planar transformer is provided. The spacing and width of the coils are disposed to extend the bandwidth from DC to GHz and allow for high frequency coupling when the core permeability dramatically drops and achieves low reflected energy and low loss over a wide bandwidth. A bottom mold having a pattern of hole-pairs with conductive elements inserted vertically couples to a top mold such that a middle portion of the conductive elements spans between the top and bottom molds. Dielectric material envelopes the middle portion and a displacement feature of the mold creates a vacancy. A ferrite element is deposited to the vacancy. A second top mold spans the bottom mold and dielectric material is deposited to create a molded assembly. A deposited patterned conductive coating connects the element ends to define the transformer coils.01-01-2009
20100245008ENTIRELY INTEGRATED EMI FILTER BASED ON A FLEXIBLE MULTI-LAYER STRIP MATERIAL - An entirely integrated EMI filter is based on a flexible multi-layer strip material. An EE or EI core comprises two side pillars and one middle pillar and forms a closed magnetic circuit. The middle pillar has an air gap. A first winding and a second winding respectively are wound around the two side pillars in a same winding direction. The middle pillar is wound with a third winding and a fourth winding, or with only a fifth winding. Passive components (e.g., all passive components) of the EMI filter are integrated into one core so that in its differential mode, insertion loss is significantly reduced, the size and volume are reduced, and the distribution constant of the EMI filter has less impact on the filter's performance.09-30-2010
336211000 CONCENTRIC OR NESTED CORE ELEMENTS 2
20090066464IGNITION APPARATUS HAVING BONDED STEEL WIRE CENTRAL CORE - An ignition apparatus includes a transformer having a central core, a primary winding disposed thereabout, a secondary winding disposed outwardly of the primary winding, a case configured to house the central components, and an outer core or shield disposed outwardly of the secondary winding. The central core is formed from multiple, low carbon steel wires held together is a cylindrical shape with cured bond coating material such as an epoxy material or an aromatic polyamide material. In one configuration, at least two different sizes of wires are used in forming the core to increase the density of the magnetically-permeable wire material in the core.03-12-2009
20100141372PULSE TRANSFORMER WITH A CHOKE PART - A pulse transformer includes a core unit and a coil unit. The core unit includes an annular core part, and an annular choke part that is disposed in contact with the annular corepart. The coil unit includes a plurality of coils, each of which is wound around both of the annular core part and the annular choke part.06-10-2010
336219000 CORE INSULATION (E.G., BETWEEN CORE PARTS) 2
20090315663REACTOR CORE AND REACTOR - In a reactor core, a gap section between a plurality of core material portions is constituted by adhering and fixing the gap section through a spacer, and a resin is arranged vertical to the adhering surface between the core material and the spacer, for sandwiching at least a part of the core material. The resin material is preferably a molded material.12-24-2009
20120280781METHOD OF MAKING A CONTROLLED SEAM LAMINATED MAGNETIC CORE FOR HIGH FREQUENCY ON-CHIP POWER INDUCTORS - A controlled seam magnetic core lamination utilizable in an inductor structure includes a magnetic base and first and second spaced-apart magnetic sidewalls extending substantially orthogonally from the base to define a seam therebetween. The controlled seam magnetic core lamination is utilizable in an inductor structure that includes: a non-conductive lower mold; a plurality of spaced-apart controlled seam lower laminations formed in the lower mold, each magnetic lower lamination having a horizontal base and first and second spaced-apart sidewalls extending substantially vertically upward from the base to define a seam therebetween; a non-conductive isolation layer formed on the lower mold and the magnetic lower laminations; a conductive trace formed on the isolation layer; a non-conductive upper mold formed over the isolation layer and the conductive trace; and a plurality of spaced-apart controlled seam magnetic upper laminations formed in the upper mold, each magnetic upper lamination having a horizontal base and first and second spaced-apart sidewalls that extend substantially vertically upward from the base to define a seam therebetween.11-08-2012
336209000 COIL WRAPPER ON BINDER 1
20110163833Method for making electrical windings for electrical apparatus and transformers and windings obtained by said method - This invention relates to a method of manufacturing electrical windings for electrical apparatus and transformers. This method comprises the following steps: manufacturing a metal mandrel defining the internal shape of the winding; installation of an internal insulation and support; installation of side rings; pouring impregnation compound on horizontally turning mandrel for obtaining a thin layer on the operational area of the mandrel and side surface of the side rings; optionally curing this layer; fixation of the first end wire using one of side rings; manufacturing winding with simultaneous pouring of compound onto the mandrel; possibly introducing intermediate insulation and/or reinforcing layers of preimpregnated reinforced plastics; optionally inserting premade sleeves around section of the winding; fixation of the second end wire using one of side rings; possibly introducing external insulation or reinforcing layers of preimpregnated reinforced plastics; possibly manufacturing secondary windings on top of the wound winding; curing the winding; extraction of the cured winding or a set of cured windings from the mandrel.07-07-2011
336015000 WITH COIL WINDING AND/OR UNWINDING 1
20090201113INTEGRATED INDUCTOR STRUCTURE AND METHOD OF FABRICATION - An inductor structure comprised of a magnetic section and a single turn solenoid. The single turn solenoid to contain within a portion of the magnetic section and circumscribed by the magnetic section.08-13-2009
336172000 COIL TURN LINKS PORTION OF CORE ACROSS SECTION (E.G., FRACTIONAL TURN) 1
20090045899Thin film magnetic device and method of manufacturing the same - A thin film magnetic device is provided, in which magnetic permeability in a high frequency range can be easily improved. Scratch-like grooves extending along an extending direction of a coil (for example, a Y-axis direction being an extending direction of a second coil part) are formed at least one side of a surface and a back of each of a lower magnetic film and an upper magnetic film. A magnetization direction of anisotropic magnetization is controlled in each of formation areas of the scratch-like grooves (formation areas of lower magnetic films and upper magnetic films), and therefore displacement (rotation) of the magnetization direction of the anisotropic magnetization is pinned by the scratch-like grooves. Consequently, certain magnetic permeability is kept even in a high frequency range. Moreover, such formation of the scratch-like grooves may not cause complexity in manufacturing process.02-19-2009
336218000 MAGNETIC ORIENTATION (I.E., DIRECTIONALLY PRESTRESSED CORE MATERIAL) 1
20100308949MULTILAYER POWER INDUCTOR USING SHEETS CHARGED WITH SOFT MAGNETIC METAL POWDER - The present invention relates to a multilayer power inductor in which sheets are charged with a soft magnetic metal alloy powder having a shape optimized along a magnetic path, pattern circuits made from conductive materials are formed on the sheets, and via holes are formed through the sheets to easily connect pattern circuits. The power inductor of the present invention is manufactured by stacking the above-described sheets into multiple layers. The sheets of the inductor of the present invention are charged with soft magnetic metal powder having a high magnetization density, and fine gaps are distributed among the powder the shape of which is optimized along a magnetic path to ensure high current superposition characteristics which allow the use of 1A to several tens of A without causing leakage flux, and ensure stable inductance to a high frequency domain of the 10 MHz band. Further, the present invention is advantageous as it provides an inductor with a thin width, a large area, high inductance and high direct current superposition characteristics.12-09-2010

Patent applications in class Inductor devices

Patent applications in all subclasses Inductor devices