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92 results about "Flux lines" patented technology

The lines of flux in a current carrying conductor are a circular in shape. Every current carrying conductor will induce lines of flux. These lines of flux in magnetic fields are similar as electrical current in electrical fields. The flux can be quantized in terms of Weber. The denoted symbol for lines of flux is φ (pi).

Electromagnetic device having compact flux paths for harvesting energy from vibrations

Electrical energy is produced by harvesting mechanical energy in the form of vibrations which are generally present in tools during the process of drilling oil wells. Electrical energy production is based on the Faraday induction principle whereby changes, i.e., movement, in magnetic flux through a coil induce an electric current through the coil. The changes in magnetic flux are produced by relative motion between at least one set of magnets and at least one coil. In particular, as the flux lines change due to the movement of the magnets, they remain perpendicular to both the direction of motion of the magnets as well as a planar or cylindrical surface defined by the coils. As a result, output for a given size of device is enhanced. Further, flexibility in adapting device form factor to particular shapes is enhanced. For example, a relatively flat device may be implemented using flexural bearing support of the magnets and coils on a printed circuit. The flexural bearings may also function as spring members that define the resonant frequency of the device. Alternative embodiments may be characterized by cylindrical or annular form factors.
Owner:SCHLUMBERGER TECH CORP +1

Rotor arrangement for an electric machine

A rotor arrangement for an electric machine having a rotor body and permanent magnets embedded in the rotor body, the permanent magnets comprising a large number of individual anisotropic magnets which are arranged and magnetized in the rotor body along lines that correspond at least approximately to a Halbach flux line distribution.
Owner:MINEBEA CO LTD

Tire metallic cable anomaly detection method and apparatus

Disclosed is an apparatus and methodology for detecting anomalies in cables within a tire structure. A plurality of magnetic field sensitive sensors are aligned within a magnetic field provided by a magnet. The alignment of sensors and magnet is such that flux lines from the magnet are generally parallel to the plane occupied by the magnetic sensors. A tire cable anomaly present between the magnetic field sensitive sensors produces a detectable difference in signals produced by the magnetic field sensitive sensors as a result of the formation of perpendicular flux patterns produced by the anomaly. A signal processing circuit receiving input signals from the sensors evaluates differences between the signals from each of the plurality of sensors by pairing the output signal from each sensor with the output signal from each of the others of the plurality of sensors and produces an output signal upon the differences meeting selected criteria. The output signal may include an externally measurable signal and / or may include a visual signal indicating presence of a tire anomaly.
Owner:MICHELIN RECH & TECH SA +1

Permanent Magnet or Permanent Magnet Array having Uniform Flux Density

A permanent magnet device includes a polarized permanent annular magnet having two oppositely charged poles faces. A magnetically conductive faceplate is disposed on each of the opposite pole faces of the permanent magnet. Each faceplate is sized, shaped and oriented to equally distribute the flux lines emanating from the permanent magnet, and to increase or concentrate the density of the magnetic flux field of a permanent magnet or permanent magnet device.
Owner:KIPP RONALD +2

Sheet transporting device

InactiveUS20100021219A1Decrease in power of adsorbingEnhance reproducibility of imageTypewritersElectrographic process apparatusElectrical conductorFlux lines
Fixed electrodes 16a having a positive potential are disposed in positions not corresponding to the positions of print heads and covered with a dielectric layer 17. A conveyor belt 10 includes a conductor layer 11 having a negative potential and a dielectric layer 12 in the surface and has holes 13, 14 through which electrical flux lines from the fixed electrodes pass. Since electrical flux lines from the dielectric layer of the fixed electrodes pass through the holes and polarize a sheet S placed on the dielectric layer 12 of the conveyor belt 10 as well as the dielectric layer 12, the sheet is electrostatically adsorbed to the conveyor belt in the vicinity of the holes. With the movement of the conveyor belt along the fixed electrodes, the sheet is transported, while being electrostatically adsorbed to the conveyor belt. The inventive device of a simple structure provides stable adsorptive power and a stable speed of transportation and is free from ink droplet deflection by electric fields.
Owner:RISO KAGAKU CORP

Shorting rings in dual-coil dual-gap loudspeaker drivers

Loudspeaker and other transducers of the dual-voice-coil / dual-magnetic-gap type can be improved by the addition of one or more annular shorting rings strategically located in the vicinity of the two magnetic gaps. The shorting rings have no effect on a steady state magnetic field but act in opposition to any change in flux density or any displacement of the flux lines such as those that occur under the loading imposed when the voice coils are driven hard with audio frequency current. The location of the shorting rings determines their effect: location close to a voice coil reduces the voice coil inductance, location entirely within the magnetic flux loop centerline favors reduction of second harmonic distortion and higher order even harmonic distortion, a centered location on the flux loop centerline, i.e. centered in the magnetic gap, favors reduction of third harmonic and higher odd order harmonic distortion, while location outside the flux loop as defined by its center line but near the voice coil acts to generally reduce harmonic distortion and reduce the voice coil inductance. Thus a plurality of rings can be strategically deployed at different locations so as to optimally suppress both even and odd order harmonic distortion and to reduce the voice coil inductance.
Owner:HARMAN INT IND INC

Multi-pattern high temperature superconducting motor using flux trapping and concentration

A high temperature superconducting synchronous motor having an inductor topology that increases the air gap flux density in direct relation to motor power density by trapping flux and concentrating it in the air gap to obtain more power in the same volume or smaller volume for the same power, and whose geometry enables the induction motor to be lighter than superconducting motors without the inductor topology, the motor being positioned in a housing, and the motor comprising: a) stator means having an armature winding to provide a stator field; b) rotor means positioned within the stator field and on which is disposed at least two polygon shaped ring or coil means along the same axis to provide separated and spaced apart relationship field solenoids; c) at least three high temperature superconducting plate means disposed in alternating relationship between the ring or coil means to hold the ring or coil means together to trap magnetic field and shape flux lines; and d) cooling means to cool the superconducting in the rotor to a temperature below the critical temperature of the superconducting plate means.
Owner:MASSON PHILIPPE +1

Brushless DC motor with permanent magnet rotor

The brushless DC motor of the present invention comprises a permanent magnet rotor rotating coaxially with and inside of the stator containing the electric windings, separated by a radial, axially extending gap. The rotor can be formed of four or more permanent, e.g., ferrite ceramic magnets, spaced substantially equidistantly circumferentially around the rotor and extending radially along the axial length of the rotor. The preferred ferrite magnets are substantially corrosion resistant, and thus durable in the wet rotor environment, in which it may be used, sufficient to withstand the effects of even hot salt water. Preferably, four of the permanent magnets are bar magnets, i.e., rectangular in cross-section, extending radially and perpendicularly to the adjacent magnets. Most preferably, the bar magnets are separated by generally wedge-shaped, or quadrant-shaped, sections of magnetic material. The permanent magnets are polarized so that the north-south flux lines extend transversely to each adjacent magnet, most preferably forming a so-called Halbach Array. This brushless DC motor is especially useful for driving wet rotor pumps, wherein the particular combination of elements forming the rotor results in a highly efficient, effective and durable motor.
Owner:TACO

Solar sunmill generator bulb

An electric radiometer generates electricity in tangible amounts by placing stationary rare earth magnets on a stationary magnetized needle which are connected to two-sided aluminum wings in such a manner that an electric current is produced when the coils in motion cut across the flux lines of a stationary magnetic field after a complete revolving circuit to a receiving device.
Owner:NUSPECIES GLOBAL MACHINES

Electromagnetic pump with oscillating piston

An electromagnetic pump is provided, which includes a hollow tubular body extending along a longitudinal direction, a piston mounted so as to be able to move inside the hollow tubular body, a solenoid, supplied with alternating current and assembled around at least a portion of the body and a magnetic envelope surrounding at least a portion of the body. The presence of a magnet magnetised longitudinally in a predetermined direction and a magnetic envelope orienting and channelling flux lines created by the magnet either around the solenoid or directly inside themselves creates an oscillating magnetic force on the piston.
Owner:SAUERMANN IND

Apparatus and methods for ferromagnetic wall inspection of tubulars

Apparatus and methods for magnetic wall inspecting materials such as cylindrical and tubular members are disclosed. One apparatus includes a main magnetic coil producing lines of magnetic flux able to traverse a section of a tubular member in a direction generally parallel to a longitudinal axis of the tubular member; and one or more magnetic focusing members positioned along the tubular and able to redirect certain flux lines so that they are more parallel to the tubular. This abstract allows a searcher or other reader to quickly ascertain the subject matter of the disclosure. It will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).
Owner:SCAN SYST

Sensitive differential pressure sensor and method

A differential pressure sensor has a magnetized piston free to move in a cylinder. Magnetic endcaps seal the ends of the cylinder, forming chambers on either side of the piston. The moveable magnetic piston is constrained by the opposing magnetic fields of the endcaps. The piston is covered with magnetic ferrofluid, providing a low friction gas-tight seal around the piston. The cylinder has two pressure input lines, one being connected to the chamber on either side of the piston. The relative pressures of the input lines cause the piston to move to a position of equilibrium within the cylinder, with the magnetic fields of the endcaps holding the piston in place against the pressure. A magnetic field angle sensor detects flux lines on the outside of the cylinder, and the reading is correlated with the pressure differential between the two input lines.
Owner:SONDEX

Magnetic fishing tool and method

An apparatus for retrieving metal objects. The apparatus includes a housing with an inner part, with the housing having a first wall. The apparatus further includes a sleeve disposed within the housing, with the sleeve being constructed of a non-magnetic conduction material. A magnet is disposed within the sleeve, with the magnet having a north pole and a south pole. The apparatus further includes a container disposed within the sleeve, the container having a second wall. In the most preferred embodiment, the first wall defines a first pathway for magnetic lines of flux for the north pole of the magnet and wherein the second wall defines a second pathway for magnetic lines of flux for the south pole of the magnet so that a toroidal magnetic field is formed about the distal end of the sleeve. A method of retrieving a metal object within a well bore is also disclosed.
Owner:VENTURI OIL TOOLS

Method for calculating synthetic field intensity and ion flow density of high-voltage direct-current transmission line by considering real-time climate conditions

The invention provides a method for calculating synthetic field intensity and ion flow density of a high-voltage direct-current transmission line by considering real-time climate conditions. The method comprises the steps of performing calculation by applying an optimized charge simulation method to obtain nominal electric field intensity E; performing calculation by applying a flux line method toobtain the synthetic field intensity and charge density of the high-voltage direct-current transmission line when haze is not considered, and calculating corona inception field intensity by adoptinga correction formula considering climate influence; calculating charge quantities of suspended fog drops and haze particles to obtain total charge density; calculating out amplitude values A of surface charge density and electric field intensity of a wire under the condition of considering the haze; and calculating out the total synthetic field intensity and ion flow density according to the fluxline method, and calculating an ion migration rate by adopting the correction formula considering the climate influence. According to an algorithm, the influence of the climate conditions of temperature, humidity, a haze index and the like on the corona ion flow field of the high-voltage direct-current transmission line is comprehensively considered, so that the synthetic field intensity and the ion flow density under different weather conditions can be more practically calculated.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Non-volatile magnetic memory device

A non-volatile magnetic memory cell having a magnetic element with multiple segments which are not co-linear. Each of the segments is magnetized with a remnant magnetic field using a single write line. The segments can be magnetized in a first direction or a second direction, corresponding to first and second orientations of the memory cell. A sensor is provided to determine the direction in which the segments are magnetized and thereby the orientation of the cell. The segments are oriented such that the magnetic flux fields created by their respective remnant magnetic fields have a cumulative effect at a sensing region of the sensor. The cumulative effect allows a less sensitive sensor to be used than in known device. In various embodiments, the magnetic element can have a number of linear segments or a curved profile. In another embodiment, multiple magnetic elements are magnetized by a single write line. The multiple magnetic elements are arranged such that remnant magnetic field stored in them can be cumulatively sensed. In another embodiment, the magnetic element is arranged to be magnetized in a single general direction, but is shaped such that magnetic flux lines emanate from it in different directions. The different directions are arranged to direct flux lines through the sensing region of a sensor, which measures their cumulative effect.
Owner:MICROMEM TECH

Detecting device of the angular position of a rotating member of an electric household appliance, in particular the drum of a washing machine

A detecting device for detecting the angular position of an electric household appliance rotating member, typically the drum of a washing machine, including generating means of a magnetic field arrangeable in a fixed position with respect to the rotating member, e.g. carried by the frame of the electric household appliance; interaction means with the magnetic field generating means integrally arrangeable in use on the rotating member in a position so as to transit periodically in front of the generating means of a magnetic field and in position adjacent to the same to cause a spatial variation of the magnetic field flux lines between a first and a second field configuration; and means adapted to generate an electric signal when crossed by the flux lines of the magnetic field; wherein said signal generating means are integral with the magnetic field generating means and are arranged, with respect to the interaction means, on the same side as the magnetic field generating means, but in a position so as to be crossed by the flux lines only in said second field configuration.
Owner:ITW IND COMPONENTS SRL

Magnetization of non-magnetized permanent magnet segments in electical machines

A method for magnetizing a rotor of an electrical machine is provided. The method includes assembling an array of non-magnetized anisotropic permanent magnet segments around a rotor spindle encased in a metallic ring. The method also includes determining multiple optimal magnetization orientation directions of the non-magnetized anisotropic permanent magnet segments. Further, the method includes positioning the assembled non-magnetized anisotropic permanent magnet segments around the rotor spindle such that the optimal magnetization orientation directions of the anisotropic permanent magnet segments are aligned with multiple flux lines produced by a magnetization fixture. Finally, the method includes energizing the magnetization fixture for magnetizing the segments via a pulse direct current for an optimal duration of the pulse.
Owner:NUOVO PIGNONE TECH SRL

Control method of superconductive electric aerotrain capable of realizing static floating

The invention relates to a control method of a superconductive electric aerotrain capable of realizing static floating, comprising the following steps: calculating induction current data generated bya superconducting magnet in an 8-shaped zero flux coil in simulation of train movement by a field-road-movement coupling theory, so as to obtain a state sample library in different movement states; when the train runs, vehicle-mounted and ground sensors detect the train running state in real time, the signal is transmitted to a central control mechanism to be compared with the state sample library, and state data conforming to the train running state at the moment are selected therefrom, so as to control a regional electric supply station to be conducted to the coil in a certain phase sequenceto generate travelling wave magnetic field to suspend the train; when the train is in a static state, direct current is conducted to the coil by the regional electric supply station; when the train speed is lower than a vehicle floating speed, the regional electric supply station supplies electricity for the 8-shaped zero flux coil; otherwise, not supplying electricity. The control method overcomes the defect that the electric aerotrain cannot suspend in a static state or a state with low speed, and can realize control on the train.
Owner:SOUTHWEST JIAOTONG UNIV

Magnetic gas engine and method of extracting work

The present subject matter overcomes the deficiencies in the prior art by introducing or generating charged particles in an air stream and manipulating the air stream with magnetic fields operating on the charged particles. Embodiments of the present subject mater compress the air stream by accelerating charged particles with a moving magnetic field, where the magnetic field has a velocity perpendicular to its flux lines. The increased velocity of the charged particles increases the statistical mean particle velocity and thereby increases the pressure in the air stream. The compressed air stream is then heated and expanded through a second magnetic field. The expansion of the air stream substantially increases the velocity of the air stream and the charged particles therein. The interaction of the high velocity charged particles and the magnetic field imparts a force perpendicular to the flux lines, this force powers the movement of the magnetic field and can also be extracted in the form of mechanical work.
Owner:MULDOON PATRICK CRAIG

Method for detecting a change in permeability of a magnetostrictive object

A method for detecting a change in permeability of a magnetostrictive object due to a change in strain. At least one first coil and at least one second coil are obtained and positioned such that magnetic flux lines induced by an electric current in the first coil(s) pass through at least one portion of the object in a direction substantially parallel to the strain direction, such that magnetic flux lines induced by an electric current in the second coil(s) pass through at least one portion of the object in a direction substantially parallel to the strain direction, and such that any electromagnetic interference sensed by the first coil(s) is sensed oppositely by the second coil(s). The total inductance of the positioned first and second coil(s) is measured over time. A change in permeability of the object is detected from a change in the measured total inductance over time.
Owner:DELPHI TECH INC +1

Alternative energy generator

Approaches presented herein enable an alternative energy generator to generate electricity and scaled voltage by placing stationary rare earth magnets on a rotating plate in such a manner that an electric current is produced when the magnets on the plate are moved and the magnet flux lines cut across a stationary metal coil. More specifically, one or more stationary metal coils are positioned near a rotating plate on which a set of magnets are places, the metal coils oriented to be crossed by magnetic flux lines of the magnets. Alternatively, a set of magnets or metal coils are place on a rotating plate with one or more stationary magnets oriented near to yield crossed magnetic flux lines. The rotating plate may be driven by a motor, a hand crank, or any human motion with a set of gears to facilitate rotational torque.
Owner:FARQUHARSON ASTON GUSTAVOUS

Alternating current generator

An alternating current electrical generator creates three different and distinct magnetic fields between would coil elements and rotating magnets, two fields of which are induced fields caused by magnet rotation. A plurality of magnets are positioned such that they extend outwardly from a rotating shaft. The magnets are circumferentially spaced around the shaft such that the north polar end of one magnet follows the south polar end of the next magnet or such that the polar end of one magnet follows a magnet with the same polar end. A plurality of stationary coil elements are positioned in spaced relation to the magnets. The coil elements each have electrical windings and metal cores which extend the lengths of the coil elements. The magnets rotate in spaced relation to the ends of the coil elements in such a way that the magnets' flux lines cut the cores located at the center of each of the coil elements. This induces alternating electric current that oscillates back and forth along the lengths of the cores. This oscillating current creates an expanding and collapsing set of magnetic flux lines which expand and contract through every inch of the coil element's windings. This expanding and collapsing magnetic field induces an expanding and collapsing magnetic field and an alternating electric field in the coil elements.
Owner:REARDON JOHN

Windmill generator

A windmill generates electricity in tangible amounts by placing stationary rare earth magnets on a stationary magnetized needle which are connected to two-sided aluminum wings in such a manner that an electric current is produced when the coils in motion cut across the flux lines of a stationary magnetic field after a complete revolving circuit to a receiving device.
Owner:FARQUHARSON ASTON GUSTAVOUS +1

Reciprocating superconducting magnetic separator

The invention discloses a reciprocating superconducting magnetic separator, relating to a mineral separation device. The reciprocating superconducting magnetic separator comprises a solenoid superconducting magnet and a separation mechanism, wherein the separation mechanism is arranged in a central hole of the horizontal solenoid superconducting magnet and comprises a main body capable of making horizontal reciprocating movement in a magnetic field, the main body comprises an adsorption body and a dummy body required for separation technology, and the adsorption body is internally provided with an adsorption cavity; and an iron magnetic shielding layer is arranged around the solenoid superconducting magnet. The iron magnetic shielding layer is necessarily arranged around the superconducting magnet and flux lines of the superconducting magnetic field are sealed in an iron magnetic material, so that that the influence on the surrounding environment caused by the outward divergence of the superconducting strong magnetic field is avoided; and the reciprocating superconducting magnetic separator has the characteristics that increasing / decreasing of the magnetic field needs trained professionals and therefore is troublesome for users of the superconducting magnet, but magnetic materials in the separation mechanism can be replaced and repaired without decreasing the magnetic field of superconducting windings.
Owner:江苏旌凯中科超导高技术有限公司

A method for calculating corona ion flow field of high-voltage direct-current transmission line under smog condition

The invention provides a method for calculating a corona ion flow field of a high-voltage direct-current transmission line under smog conditions, the method comprising the steps of applying an optimized simulation charge method to calculate a nominal electric field strength; applying a flux line method to calculate the composite field strength and charge density of the transmission line without considering smog; calculating the charge of suspended droplets and haze particles to obtain the total charge density; calculating the surface charge density and A value of the conductor considering smog. The total synthetic field strength and ion current density are calculated by the flux line method. This method can quickly calculate the relevant parameters in the ion flow field of a high-voltage direct-current transmission line in smog weather, such as synthetic electric field strength, ion current density, space charge density and so on, and can meet the engineering requirements. The calculation results can provide a reference for the corona effect of high-voltage direct-current transmission lines when smog is considered in the planning and design of high-voltage direct-current transmission lines.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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