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Eddy Currents patents



      
           
This page is updated frequently with new Eddy Currents-related patent applications. Subscribe to the Eddy Currents RSS feed to automatically get the update: related Eddy RSS feeds. RSS updates for this page: Eddy Currents RSS RSS


Mapping eddy current fields in mri system

Magnetic heat generation and transfer apparatus and method

Electromagnetic system and method

Date/App# patent app List of recent Eddy Currents-related patents
08/21/14
20140233184
 Phase change material as a dynamic heat sink for trancutaneous energy transmission systems patent thumbnailPhase change material as a dynamic heat sink for trancutaneous energy transmission systems
A method and system for management of thermal energy produced during transcutaneous energy transmission to provide power to energize implanted medical devices. A phase changing material (pcm) acts as a heat sink to absorb thermal energy generated during the energy transfer process.
08/21/14
20140232393
 Mapping eddy current fields in mri system patent thumbnailMapping eddy current fields in mri system
Eddy current fields in a magnetic resonance imaging (mri) system are mapped by acquiring mri data from an object located in an imaging volume of the mri system. An mri data acquisition sequence is preceded by a pre-sequence including (a) a gradient magnetic field transition that stimulates eddy current fields in the mri system, and (b) a spatial modulation grid tag module that sensitizes a spatially resolved mr image of the acquired mri data to the stimulated eddy current fields that existed during the spatial modulation grid tag module.
08/21/14
20140231414
 Magnetic heat generation and transfer apparatus and method patent thumbnailMagnetic heat generation and transfer apparatus and method
A magnetic heat generation and transfer apparatus and method for generating transferable usable heat. The magnetic heat generation and transfer apparatus and method includes a base; an air mover assembly mounted to the base and including a power source with a rotatable drive shaft and also including disc members spaced apart and attached to the rotatable shaft; and a heat generating assembly mounted to the base and including pivotable elongate support members and magnetic members attached to the elongate support members for generating eddy currents resulting in heat generation..
08/14/14
20140228671
 Electromagnetic system and method patent thumbnailElectromagnetic system and method
Differences of electromagnetic (em) properties between healthy and cancerous tissues allow detection of abnormal conditions occurring in a tissue of an animal, for example, intra-operative cancer detection. By using a time-varying em field, electrical eddy currents are generated in the tissue sample, and assessed using phase-sensitive detection.
08/07/14
20140218887
 High-voltage switching device with energy-supply device patent thumbnailHigh-voltage switching device with energy-supply device
The present invention relates to a high-voltage switching device with energy-supply device according to the preamble of the first claim. The general inventive idea consists in locating at least two oppositely wound first conductor loops in a first recessed region on the outer side of an emc-secure housing for a high-voltage switching device, the outer side of which is designed as a screening plate, and that these loops interact electrically with at least two other second conductor loops, also wound in opposite directions, which are disposed in a second recessed region on the inside of the emc-secure housing, also designed as a screening plate, such that due to the different directions of the windings of the first two conductive loops and the second two conductor loops, the current flows in opposite directions in the windings of the first and second two conductor loops, and thus each produces an opposing magnetic field, and these fields are additively superimposed such that the eddy currents on the outside and inside of the emc-secure housing compensate for one another, and thus an inductive energy supply system will be created through the emc-secure housing..
08/07/14
20140218031
 Magnetic resonance imaging apparatus and control method thereof patent thumbnailMagnetic resonance imaging apparatus and control method thereof
A magnetic resonance imaging apparatus includes a magnetic assembly including a main magnet and a gradient coil unit and forming a static magnetic field and a gradient magnetic field in the bore thereof, and a gradient controller applying a test gradient waveform to the magnetic assembly, and compensating for a distortion of the magnetic field gradients, caused by eddy currents, by reflecting the actual shape of the applied test gradient waveform.. .
07/24/14
20140203988
 Integrated antennas for near field coupling integration patent thumbnailIntegrated antennas for near field coupling integration
Described herein are techniques related to near field coupling and wireless power transfers. In an implementation, a portable device may include full metallic chassis devices.
07/10/14
20140194044
 Poultry processing apparatus having one or more transfer units patent thumbnailPoultry processing apparatus having one or more transfer units
A processing apparatus for poultry is provided. In an exemplary embodiment, the apparatus includes one or more transfer units placed intermediate of conveying poultry from, a first line to a subsequent second line, wherein both the first line and the second line are selected from the group including a slaughtering line, an evisceration line, a chilling line, a sorting line and a cutup line.
07/10/14
20140190003
 Inductor with laminated yoke patent thumbnailInductor with laminated yoke
A method for forming a thin film inductor having yokes, one or more of which is laminated, and one or more conductors passing between the yokes. The laminated yoke or yokes help reduce eddy currents and/or hysteresis losses..
07/03/14
20140186170
 Centrifugal expanders and compressors each using rotors in both flow going from periphery to center and flow going from center to periphery   their use in engines both external heat and internal combustion.   means to convert radial inward flow to radial outward flow with less eddy currents patent thumbnailCentrifugal expanders and compressors each using rotors in both flow going from periphery to center and flow going from center to periphery their use in engines both external heat and internal combustion. means to convert radial inward flow to radial outward flow with less eddy currents
An engine feeds, at either the periphery or the center of one of the pumps, either compressed then heated air or products of combustion into centrifugal expanders in series. This invention is also a set of related inventions, comprising a group of flow guides to convert radial flow to axial flow and a group to convert axial flow to radial flow and the combination of those flow guides.
06/26/14
20140176698
Systems and methods for imaging characteristics of a sample and for identifying regions of damage in the sample
Systems and methods for imaging characteristics of a sample and for identifying regions of damage in the sample are generally described. Some example systems and methods for non-destructive evaluation of regions of material may operate in a direct current (dc) mode in which the system directly images regions of material where weak structural damage has occurred by imaging a self magnetic field generated by a dc electric current coupled through the material.
05/29/14
20140145535
Eddy current torque transfer coupling assembly
An electrical slip coupling assembly and method for enhancing transmission of torque are provided. The coupling assembly includes a field member (fm), an armature member (am), and annular windings.
05/08/14
20140124501
Induction cooktop appliance
An induction cooktop appliance is provided. The induction cooktop appliance includes an induction heating element and a metal top panel positioned above the induction heating element for supporting cooking utensils thereon.
04/24/14
20140111204
Magnetic resonance imaging apparatus and high-frequency magnetic field dertermination method
According to this invention, in order to obtain high-quality images even when the slice selective gradient magnetic fields waveform is distorted by eddy currents and vibration, high-frequency magnetic field information is calculated on the basis of an output gradient magnetic field waveform applied in accordance with the input gradient magnetic field waveform that is set in a pulse sequence, and the calculated high-frequency magnetic field information is set in the pulse sequence. Then, the set input gradient magnetic field, and the excitation rf pulses of the calculated high-frequency magnetic field information are used during imaging.
04/24/14
20140111203
Reducing artifacts in magnetic resonance images acquired using propeller echo planar imaging
In propeller utilizing epi k-space sampling, phase errors arising primarily from eddy currents can considerably degrade image quality. The phase errors include spatially constant phase errors, spatially linear phase errors, and oblique phase errors.
04/24/14
20140109392
Method for manufacturing rotor and cleaving apparatus
In a method for manufacturing a rotor in which a plurality of cleaved magnet pieces are mounted in a rotor core with cleaved surfaces of the cleaved magnet pieces in an engaged state. In a cleaving step, a magnet workpiece having a recess in a surface thereof is cleaved at the recess as a starting point, thereby producing a first magnet piece and a second magnet piece.
04/10/14
20140096503
Magnetic de-icing
An apparatus has a first member having an exposed peripheral surface and an electrically and thermally conductive portion. A circumferential array of magnets of alternating polarity are mounted for rotation about an axis relative to the first member inboard of the peripheral surface, the magnets being in sufficient proximity to the electrically and thermally conductive portions so that the rotation of the magnets about the axis is effective to generate eddy currents, in turn, is effective to heat the electrically and thermally conductive portion and, thereby, heat the exposed peripheral surface..
03/27/14
20140084925
System and method for prepolarizing magnetic resonance- or relaxation-based measurements
The invention relates to a prepolarizing magnetic resonance- or relaxation-based measurement system, comprising a prepolarizing coil for producing a prepolarizing field at the target zone, means for pulsing the prepolarizing field according to a first pulsing scheme, and means for measuring magnetization of a target placed in the target zone. According to the invention, the system further comprises a shielding coil for producing a shielding field and means for pulsing the shielding field according to a second pulsing scheme, whereby the shielding coil and the second pulsing scheme are arranged to reduce the formation of unwanted transient fields caused by the coupling of the prepolarizing coil to conducting or magnetic structures in the surroundings of the system.
03/27/14
20140084400
Methods and apparatus for magnetic sensor having non-conductive die paddle
Methods and apparatus to provide an integrated circuit package having a conductive leadframe, a non-conductive die paddle mechanically coupled to the leadframe, and a die disposed on the die paddle and electrically connected to the leadframe. With this arrangement, eddy currents are reduced near the magnetic field transducer to reduce interference with magnetic fields..
02/27/14
20140055130
Nondestructive inspection device using alternating magnetic field, and nondestructive inspection method
[problem] in conventional non-destructive inspection devices using magnetism, the subject of inspection was limited to the surface layer of the test object as a result of the skin effect, and it was not possible to perform flaw detection inspection at the interior or reverse surface of thick-structured test objects. [solution] the effect of the surface effect was eliminated by imparting an external signal canceling the detection output of the test object surface layer from the detection output of a magnetic field resulting from eddy currents induced in the test object.
02/06/14
20140035315
System and method to reduce the aerodynamic force on a vehicle
Disclosed is a vehicle including a tractor having a lower tractor duct that receives air from the front of the tractor and channels the air through a center area of the tractor and down between a set of rear wheels, a trailer having a lower trailer duct positioned below a cargo space that channels the air in the lower trailer duct between each set of trailer rear wheels and a lower articulation duct positioned near the set of tractor rear wheels that receives air from the lower tractor duct and communicates air to the lower trailer duct. An upper duct channels air through ductwork at the top of the trailer and tractor.
01/23/14
20140024302
Poultry processing apparatus having one or more transfer units
A processing apparatus for poultry is provided. In an exemplary embodiment, the apparatus includes one or more transfer units placed intermediate of, conveying poultry from, a first line to a subsequent second line, wherein both the first line and the second line are selected from the group including a slaughtering line, an evisceration line, a chilling line, a sorting line and a cutup line.
01/23/14
20140021946
Finger biometric sensor including magnetic field finger biometric sensing pixels and related methods
A finger biometric sensor may include a substrate and an array of magnetic field finger biometric sensing pixels carried by the substrate. The finger biometric sensor may also include processing circuitry coupled to the array of magnetic field finger biometric sensing pixels and capable of generating a magnetic field extending into a finger positioned adjacent the array of magnetic field finger biometric sensing pixels to cause eddy currents in the finger.
01/16/14
20140017084
Hydro-impelled kayak paddle
A kayak paddle has blades configured to generate forward kayak momentum in each one of the three paddling movements, being more effective than known paddles, using its hydrodynamic profile to reduce formation of turbulent and eddy currents when moved in the water both, during insertion and retrieval. The paddle is characterized by a blade with a cross section in which both edges are curved, the frontal face is convex, and the back face is either flat, concave or both, but not convex, so as to benefit from the water flow around the surface or “bernoulli effect”, specifically on insertion in deep water and retrieval from it, producing forward motion of the kayak due to such hydrodynamic forces..
12/26/13
20130341009
Detector system of slickline irregularities
Detector of slickline irregularities (dila) is a electronic system to detect and assess irregularities in production wells or to a new slickline by measuring eddy currents or eddies or foucault currents. The system lines can vary in diameter depending on the operation to be performed on each well.
12/19/13
20130335081
Sample holder for use in nmr
A pressurizable holder for a sample to be examined by nmr, comprises a pressure retaining nonmagnetic tube surrounding a radio-frequency coil which in turn surrounds a space for the sample. The pressure retaining tube is formed of (i) nonmetallic electrically insulating material such as a ceramic or (ii) nonmetallic electrically insulating matrix material reinforced with electrically insulating filaments such as glass fiber, or (iii) non-metallic electrically insulating matrix material reinforced with electrically conductive filaments configured so that conductivity is anisotropic.
12/19/13
20130334901
Ironless electrical machines with internal water cooled winding between two magnet rows
The invention provides ironless electrical machines with internal water cooled winding between two magnet rows. The winding with internal water cooling has very high heat dissipation and continuous force.
12/12/13
20130331649
Magnetically maneuverable in-vivo device
An in-vivo device includes a magnetic steering unit (msu) to maneuver it by an external electromagnetic field. The msu may include a permanent magnets assembly to produce a magnetic force for navigating the device.
12/05/13
20130320795
Magnetic gear mechanism
The present invention is intended to provide a magnetic gear structure that realizes a magnetic gear that transmits a torque efficiently by reducing eddy currents generated in the interior of magnets. In order to solve the subject described above, in the magnetic gear structure, a structure in which magnets are arranged in the interior of an iron core in an inner rotor portion.
11/28/13
20130317340
Electromagnetic apparatus and method for nerve localization during spinal surgery
An electromagnetic pedicle awl utilizes a tightly focused time-varying magnetic flux to create a localized electromotive force (emf) near the tip. The localized emf creates localized eddy currents in nearby nerves which excite ionic nerve channels, the excitation being detected by an electromyographic recording device.
11/21/13
20130308256
Flat power coil for wireless charging applications
A coil assembly is disclosed. The coil assembly includes a coil that is provided on a substrate.
11/21/13
20130306552
Method of forming filter elements
A method of forming a filter element is disclosed comprising introducing a mixture into a mold, the mixture comprising a plurality of susceptor particles and a plurality of polymeric binder particles. Eddy currents are induced in the susceptor particles by subjecting the mixture to a high-frequency electromagnetic field, the eddy currents being sufficient to elevate the temperature of the susceptor particles to cause adjacent polymeric binder particles to be heated to at least a softening point.
11/14/13
20130299418
Method of forming filter elements
A method of forming a filter element is disclosed comprising introducing a mixture into a feeder, the mixture comprising a plurality of susceptor particles and a plurality of polymeric binder particles. The mixture is advanced through the feeder and into a die comprising an excitation portion where eddy currents are induced in the susceptor particles by subjecting the mixture to a high-frequency electromagnetic field, the eddy currents being sufficient to elevate the temperature of the susceptor particles to cause adjacent polymeric binder particles to be heated to at least a softening point.
11/07/13
20130293051
Radial magnetic bearing for magnetic support of a rotor
A radial magnetic bearing for magnetic bearing of a rotor has a stator which includes a magnetically conductive stator element, arranged circulating around a rotor. The stator element has recesses running in the axial direction of the stator element in which electrical lines from coils are arranged, wherein magnetic fields can be generated by the coils which hold the rotor suspended in an air gap arranged between the rotor and stator.
10/24/13
20130276991
Method for disconnecting, by induction, a magnetic mechanical part adhered to a mechanical part
A method for disconnecting a first mechanical part from a second magnetic mechanical part, the first mechanical part being adhered to the second magnetic mechanical part by an adhesive film along a connecting area. In the method, a magnetic field is generated at least within the connecting area so as to generate, by induction, eddy currents in the second magnetic mechanical part, to soften the adhesive film and enable disconnection of the first and second mechanical parts..
10/17/13
20130270824
Vertical axis wind turbine
A turbine assembly is provided. The turbine assembly includes a plurality of sails and a generator assembly configured to convert rotation thereabout to power.
10/03/13
20130260645
Eddy current sensor and polishing method
An eddy current sensor is used for detecting a metal film (or conductive film) formed on a surface of a substrate such as a semiconductor wafer. The eddy current sensor is disposed near the metal film or the conductive film formed on the substrate to detect an eddy current generated in the metal film or the conductive film.
10/03/13
20130257578
Reconfiguring tape wound cores for inductors
A tape wound inductor core device, inductors including same and methods of manufacture. Tape wound material may be cut and/or shaped into “pucks” that have an exterior surface made up of or defined substantially by the edge surfaces of the layers of the constituent conductive material, with all or most of the broad surfaces disposed inwardly, thereby reducing eddy currents and associated losses.
09/05/13
20130229182
Gradient coil with correction windings and method for production thereof
In a coil arrangement for nuclear magnetic resonance comprising a main coil (13), a shielding coil (14), and at least one correction coil (41), the function of which consists in forming a magnetic field gradient with eddy current properties which are as good as possible, the main coil (13) and the shielding coil (14) are electrically connected in series with the correction coil (41). The deviations of the residual field from the desired design generated by production tolerances are thereby modified by the correction coil in such a fashion that the long-lasting eddy currents are suppressed.
08/29/13
20130224100
Electromagnetic mixing for nitride crystal growth
A method and apparatus for bulk group-iii nitride crystal growth through inductive stirring in a sodium flux growth technique. A helical electromagnetic coil is closely wound around a non-conducting cylindrical crucible containing a conductive crystal growth solution, including both precursor gallium and sodium, wherein a nitrogen-containing atmosphere can be maintained at any pressure.
08/29/13
20130221910
Mobile terminal and wireless charging module therefor
The present invention provides a mobile terminal which, when wireless (contactless) charging of a battery is performed by approximating a transmission coil of a charging unit (charging pad) and a reception coil provided in a wireless charging module of a mobile terminal, can adjust the saturation magnetic flux density and eddy currents of a shield sheet to which the reception coil is attached, the shield sheet being provided in the wireless charging module. When the reception coil is placed on the shield sheet to perform wireless charging, the saturation magnetic flux density and eddy current generation in the shield sheet are adjusted for wireless charging purpose because a part of the region in which the magnetic flux density is most quickly saturated was clipped off from the shield sheet.
08/22/13
20130214769
Use of capacitance and eddy currents to analyze polycrystalline diamond
A method for non-destructively characterizing one or more regions within a polycrystalline structure using capacitance and eddy current measurements. The eddy current measurements include at least one of an impedance amplitude and a phase shift angle.
08/22/13
20130214768
Use of eddy currents to analyze polycrystalline diamond
A method, system, and apparatus for non-destructively characterizing one or more regions within an ultra-hard polycrystalline structure using eddy current measurements. The apparatus includes an eddy current measuring device having at least one terminal, a leached component comprising a polycrystalline structure, a first wire, and a probe.
08/15/13
20130207659
Rf shield for mri comprising conductive coating as shielding material
The invention relates to a magnetic resonance imaging system (1) comprising: a main magnet (2) for generating a uniform, steady magnetic field within an examination volume, at least one rf antenna (9) for transmitting rf pulses to the examination volume for magnetic resonance spin excitation, a gradient coil unit comprising gradient coils (4, 5, 6) for generating gradient magnetic fields in the examination volume (100), an rf shield (104) disposed between said rf antenna (9) and said gradient coils (4, 5, 6), said rf shield (104) comprising a shielding material adapted for suppressing eddy currents induced in the shield by said gradient magnetic fields and for screening rf fields towards the gradient coils (4, 5, 6), said rf fields being generated by the rf antenna (9), wherein the rf shield comprises a conductive coating (104, 110) as shielding material.. .
08/15/13
20130206751
Hole heating and spot heating via rotational or reciprocating magnetic heating
A method for heating surfaces includes heating the surface of a hole by inserting a magnet cylinder into the hole and rotating the magnet cylinder, heating the surface of a hole by inserting a magnet stack into the hole and reciprocating the magnet stack, or heating a selected area of a workpiece surface by positioning a magnet disc adjacent the selected area and rotating the magnet disc. In each case, eddy currents are produced, inducing heating of the surface..
08/08/13
20130200889
Device and method for inductive measurements
A method and device for nondestructive and noncontact detection of faults in a test piece, or electrically conductive particles in a liquid flow, moving passed the device, using eddy currents. The test piece or flow is exposed to periodic alternating electromagnetic fields.
07/18/13
20130181304
Methods and apparatus for magnetic sensor having non-conductive die paddle
Methods and apparatus to provide an integrated circuit package having a conductive leadframe, a non-conductive die paddle mechanically coupled to the leadframe, and a die disposed on the die paddle and electrically connected to the leadframe. With this arrangement, eddy currents are reduced near the magnetic field transducer to reduce interference with magnetic fields..
07/11/13
20130176095
Inductor with laminated yoke
A thin film inductor having yokes, one or more of which is laminated, and one or more conductors passing between the yokes. The laminated yoke or yokes help reduce eddy currents and/or hysteresis losses..
07/11/13
20130175260
High frequency heating coil
A high frequency heating coil is provided in which a main body part of a workpiece is surrounded by a loop part of the high frequency heating coil and subjected to high frequency heating, and a flange part of the workpiece is sandwiched by first and second lead-out parts of the high frequency heating coil and subjected to high frequency heating. The first and second lead-out parts oppose the flange part and are offset in the axial direction of the workpiece, thereby preventing eddy currents in opposite directions to each other from being generated in the flange part and preventing the flange part from being more difficult to heat than the main body part.
06/27/13
20130164802
Moving bed biofilm reactor (mbbr) process for conversion of syngas components to liquid products
A moving bed bioreactor (mbbr) produces liquid products from a gaseous substrate of co and/or co2/h2 using a biomass that grows on the surface of carrier suspended in a fermentation broth into which the gaseous substrate is at least partially dissolved. The injection devices include gas spargers and preferably a high efficiency gas transfer process such as jet or slot aerator/gas transfer devices.
06/20/13
20130157865
System for magnetic field distortion compensation and method of making same
A system and method for magnetic field distortion compensation includes a cryostat for a magnetic resonance imaging (mri) system. The cryostat includes a vacuum casing having a vacuum therein.
06/20/13
20130154620
Displacement tamper sensor and method
A displacement sensor for sensing displacement of a first surface relative to a second surface includes a coil mounted on the first surface, and encircling a region in plane; and a conductor extending lengthwise from the second surface through the region. The conductor has a volume that varies along its length.
06/13/13
20130146588
Segmented susceptor for temperature uniformity correction and optimization in an inductive heating system
An inductively coupled heating system having a segmented susceptor is disclosed. The segmented susceptor includes two or more segments, each segment having a side edge that is mateable with a side edge of another segment.
06/06/13
20130141093
Surface electrode design that can be left in place during mr imaging
For use in mr imaging of a patient a plurality of surface electrodes such as ecg or defibrillator are provided for obtaining electrical signals for determining electrical activity within the body of the patient and remain in place during the mr imaging. The surface electrodes include a quick disconnect wire for carrying the signals to a signal processing system to be removed during the mr imaging to prevent heating.
06/06/13
20130140112
Brake device comprising a rotor of an eddy current disk brake, the rotor forming the brake disk of a friction disk brake
A brake device of a vehicle, containing an eddy current disk brake having a rotationally fixed stator and a rotating rotor, wherein the rotor or the stator bears an eddy current path and the stator or the rotor bears a magnetic arrangement, the magnetic field lines of which induce eddy currents in the eddy current path for generating a braking torque upon a relative movement of the rotor with respect to the stator, and a friction disk brake having at least one brake disk and brake pads cooperating with the brake disk for generating a braking friction torque between the brake disk and the brake pads, wherein the rotor of the eddy current disk brake is formed by the brake disk of the friction disk brake.. .
05/23/13
20130127267
Cylindrical linear motor with laminated stator
A cylindrical linear motor includes a cylindrical rotor, and a cylindrical stator arranged in coaxial relationship to the rotor. The stator has a plurality of annular coils which are arranged in coaxial relationship, and a ferromagnetic stator core which includes a plurality of individual laminations which are aligned radially or arranged in a star shape.
05/02/13
20130105467
Apparatus and method for induction sealing of conveyed workpieces
Apparatus and method for induction sealing workpieces, in which a series of workpieces are conveyed along a path extending in a conveyance direction, and each workpiece is exposed to a first electromagnetic field generated by a first induction head and to a second electromagnetic field generated by a second induction head, each of the first and second electromagnetic fields inducing eddy currents through the entirety of each workpiece. Respective magnetic axes of the first and second induction heads are non-parallel to each other such that each workpiece is exposed to a plurality of differently oriented electromagnetic fields as the workpiece is conveyed along the path..
04/11/13
20130088222
System and method for measuring wrinkle depth in a composite structure
In accordance with one embodiment, a method is provided for non-destructive examination of a composite structure having a non-conductive surface and a conductive substrate. The method may include applying an alternating current to a probe having a coil conductor, scanning the probe across the non-conductive surface to induce eddy currents in the conductive substrate, and measuring changes in an electrical property of the probe in response to changes in the eddy currents indicative of variations in the depth of the conductive substrate..
04/04/13
20130084383
Method and arrangement of crosslinking or vulcanising an elongate element
A method and arrangement of crosslinking or vulcanising an elongate element in which method a conductor element is coated by a layer of crosslinkable synthetic material in an extrusion step and the crosslinking reaction is carried out after the extrusion step. The conductor element is pre-heated in a pre-heating step before the extrusion step by generating inductively eddy currents inside the conductor element which will heat up the conductor element.
03/21/13
20130068586
Coin discriminators
Disclosed are various apparatus and methods for discriminating between fake and reject coins. The term ‘coin’ includes any type of monetary token or token that is associated with a value.
03/07/13
20130056944
Magnetic eddy current speed retarding system and wheeled conveyance
A magnetic braking, governing, or speed retarding system for use with a wheeled conveyance may take advantage of eddy currents induced when a magnet moves past a non-magnetic conductor. A plurality of magnets may be disposed within a rotor that rotates as a wheel axle rotates.
02/28/13
20130050045
Multiple-turn loop antenna arrangement and a portable radio communication device comprising such an arrangement
An exemplary embodiment includes a multiple-turn loop antenna arrangement comprising a multiple-turn loop element. The multiple-turn loop element is arranged in a first layer.
02/28/13
20130049919
Vertical slow-wave symmetric inductor structure for semiconductor devices
A vertical inductor structure in a semiconductor device includes a plurality of vertically oriented spirals that produce magnetic field in a dielectric material above the surface of a semiconductor substrate thereby preventing any eddy currents from propagating in the substrate. An inductor shield structure is also provided.
02/14/13
20130037530
Machine for joining the ends of steel strips which machine is suited to the induction heat treatment of joining welds
A joining machine for joining ends of successive strips in a strip treatment installation includes a device welding a first end of a strip to a second end of another strip, a first pair of symmetrical clamping jaws including a first upper and a first lower clamping jaw gripping the first end of a strip, a second pair of symmetrical clamping jaws including a second upper and a second lower clamping jaw gripping the second end of a strip, the clamping jaws holding and positioning the first end facing the second end for welding the ends together. At least two clamping jaws of the two pairs each include a part for contacting one of the ends to be welded to another end.
01/31/13
20130027833
Electromagnetic actuator
An electromagnetic actuator operating like a holding magnet includes an anisotropic permanent magnet connected with a ferromagnetic yoke, an electromagnet and a ferromagnetic armature that is movable relative to the electromagnet. The yoke is cup-shaped and has a circular, elliptical or polygonal cross-section to reduce magnetic stray flux.
01/03/13
20130002053
Slotless motors with grooved core
The invention provides slotless electrical motors with grooved core (grooved motors). The motors with grooved core are much easier in production than conventional motors with laminated core.


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Eddy Currents topics: Eddy Currents, Magnetic Field, Wind Turbine, Gradient Coil, Calibration, Current Measurement, Crystallin, Scattering, Disconnect, Semiconductor Wafer, Semiconductor, Mobile Terminal, Crystal Growth, Phase Shift, Magnetic Resonance Imaging

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