91 results about "Flux lines" patented technology

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.

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.

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.

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.

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.

An apparatus that includes a first read shield and a second read shield and a reader stack between the first and second read shields. The first and second read shields each include a thin high permeability layer closest to the reader stack and a low permeability layer and/or a geometric feature to control magnetic field flux lines in a free layer of the reader stack.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

A rotary transformer for coupling electrical power at a high level into a rotor operable at a high rotational speed without the introduction of undesirable electromagnetic torque and problems of dynamic mechanical instability comprises a stationary primary mounted in surrounding relationship with respect to the rotor, an electromagnetic shield having an exterior surface thereon mounted to the rotor, and a secondary mounted on the exterior surface of the shield. The secondary is connected in an electrical circuit with the load such that the application of an alternating current having a frequency of at least one (1) kilohertz to the primary produces an alternating electromagnetic field having flux lines in the secondary in the secondary oriented generally parallel to the axis of rotation. The alternation of the electromagnetic field induces a voltage in the secondary that generates an electric current to the load. The shield isolates the rotor from the alternating electromagnetic field to prevent eddy current heating of the rotor.