1417results about How to "Increase the magnetic field strength" patented technology

A magnetic coupling having two opposed annular arrays of angularly spaced permanent magnets magnetized to create magnetic north poles and magnetic south poles alternately spaced about each array. The north-pole and south-pole magnets of each array are tapered in cross-section from their surfaces at the gap to an annular surface of the array spaced from the gap, and permanent magnet spacer magnets completely fill in the space between the north-pole and south-pole magnets from the annular surface of the array at the gap to the spaced annular surface with the spacer magnets being magnetized generally transversely to the direction of magnetization of the adjacent north-pole, south-pole magnets so that the magnetic field created by the permanent magnets extends across the gap and annularly through each array to cause one of the arrays to rotate in synchronism with the other array.

Chargers which can be connected to batteries with different charging requirements and which have an identification device for identification of the different batteries are disclosed. With these chargers, the different types of batteries are recognized by a magnetic identification device. In a first exemplary embodiment, the identification device comprises at least one magnetic sensor, which is arranged in or on the charger and detects at least one magnetic parameter of a magnetic element, which is mounted in or on the battery. In a second exemplary embodiment, the identification device has at least one magnetic element and at least one magnetic sensor for detection of at least one magnetic parameter of the at least one magnetic element. The battery comprises a shielding and / or amplifying device, which alter(s) the at least one magnetic parameter of the at least one magnetic element.

A reciprocating and rotating magnetic refrigeration apparatus adopts a dynamo concept and the design of magnetic supply path and heat transfer unit to alternately magnetize and demagnetize a magnetocaloric material to generate thermo-magnetic effect for cooling. The apparatus includes magnetocaloric material located on the head of stator nose poles, magnetic supply coils surrounding the magnetocaloric material, permanent magnets located on a rotating stator, and a heat transfer unit in contact with the magnetocaloric material. Two adjacent magnetocaloric materials magnetize and demagnetize alternately to alter the temperature and entropy of the magnetocaloric material, and through the heat transfer unit, heat exchange occurs between the magnetocaloric materials and the atmosphere to achieve the cooling effect.

A unilateral magnet apparatus having a remote uniform field region. The apparatus' uniform remote field region is suitable for a variety of nuclear magnetic resonance applications.

Embodiments in accordance with the present invention provide a perpendicular recording magnetic head whose dimensional dependency on the nonuniformity of magnetic field strength and distribution during manufacture is minimized, with narrowed tracks and without attenuation or erasure of adjacent track data while maintaining high magnetic field strength. According to one embodiment, a magnetic material (trailing / side shield) for creating a steep gradient of magnetic field strength is provided at a trailing side of a pole tip of a main magnetic pole piece and in a direction of the track width. The magnetic head is formed so that a gap (side gap length “gl”) between a side shield and a throat height portion of the pole tip progressively decreases with an increasing distance from an air-bearing surface, in a direction of an element height. That is, side gap length “gl” (2) at an element height position P2 is made smaller than side gap length “gl” (1) at an air-bearing surface position P1 so as to satisfy a relationship of gl(1)>gl(2).

MRI operates by passing current through gradient coils to create a magnetic field. Creation of the magnetic field requires a relatively high current which causes a large heat build up within the MRI, especially in the patient space. The present invention provides for a hollow conductor through which a coolant can be passed directly during the application of current.

Described here is an automated robotic device that isolates circulating tumor cells (CTCs) or other biological structures with extremely high purity. The device uses powerful magnetic rods covered in removable plastic sleeves. These rods sweep through blood samples, capturing, e.g., cancer cells labeled with antibodies linked to magnetically responsive particles such as superparamagnetic beads. Upon completion of the capturing protocol, the magnetic rods undergo several rounds of washing, thereby removing all contaminating blood cells. The captured target cells are released into a final capture solution by removing the magnetic rods from the sleeves. Additionally, cells captured by this device show no reduced viability when cultured after capture. Cells are captured in a state suitable for genetic analysis. Also disclosed are methods for single cell analysis. Being robotic allows the device to be operated with high throughput.

Separation apparatus and method for separating magnetic and / or magnetically-labeled particles from a test medium.Test medium within a reaction chamber is caused to flow past a collecting surface, and a high-gradient magnetic field is applied to the surface to capture magnetically responsive particles in the test medium. The particles are deflected toward the collection surface by baffles, a spinner, or a sprayer, or are funneled past the surface by a plunger operable to be displaced into close proximity to the surface to provide a narrow flow path for the particle-laden test medium. The particles normally suspended in the medium are separated out of suspension by adhesion to the collection surface. The particles may be resuspended by removal of the surface from the high-gradient field, or removal of the high-gradient field from the surface. The collection surface is a thin-walled non-magnetic material having a plurality of magnetic pole faces positioned therearound.

A stylus that operates utilizing magnetic fields, wherein a permanent magnet is disposed within a passive stylus that is detectable by a plurality of magnetic sensors that remove the magnetic field of the stylus from the earth's relative magnetic field to thereby obtain vectors that are used in a triangulation equation to determine the location of the stylus in two or three dimensions, depending upon the number of magnetic sensors that are used, wherein one set of magnetic sensors can be used as a reference for earth's magnetic field, and wherein each of the magnetic sensors includes a polarizing coil to change direction of sensitivity, a null coil and a flipping coil.

The invention discloses a mobile terminal with a rotation camera. The mobile terminal with the rotation camera comprises a terminal main body and a rotation camera component which is arranged at the top of the terminal main body and can rotate relatively to the terminal main body, wherein a Hall sensor is arranged at one end of the terminal main body, close to the rotation camera component, the Hall sensor is electrically connected with a central processing unit, a first magnet and a second magnet are arranged on a position in the rotation camera component, corresponding to the Hall sensor, the first magnet and the second magnet are bar magnets, a polarity of the first magnet and a polarity of the second magnet, which are the same, are oppositely arranged, and the first magnet, the second magnet and the Hall sensor are located on the same straight line under the circumstance that the rotation camera component is not rotated. The invention further discloses a camera angle control method of the mobile terminal with the rotation camera. By adopting the technical scheme, the mobile terminal with the rotation camera has strong magnetic field intensity, can effectively improve detection precision, and enables rotation angle detection to have good interference resistance.

The invention relates to a large axial eddy current damper manufactured through a spiral transmission method. The axial eddy current damper based on the spiral transmission method comprises a spiral pair transmission assembly and a rotary eddy current damping generator. The rotary eddy current damping generator comprises an upper disc and a lower disc which are consistent in size, are vertically parallel and are made of magneto-conductive materials, wherein a rotary disc which is parallel with the upper disc and is made of electricity-conductive materials or magneto-conductive materials is arranged between the upper disc and the lower disc, the rotary disc is installed on the spiral pair transmission assembly and rotates along with the spiral pair transmission assembly, a plurality of pairs of magnets are further arranged between the upper disc and the lower disc, and the opposite magnetic poles of an upper magnet and a lower magnet of each pair of magnets are opposite in polarity. According to the axial eddy current damper based on the spiral transmission method, axial movement of a controlled structure is converted into the rotary movement of an inner structure of the damper to be controlled through a spiral pair, the control efficiency is largely improved, and the ratio between the damping force of the axial eddy current damper and the self weight is improved to the level equal to that of a viscous fluid damper or higher level.

The invention relates to a magnetic fluid sealing structure, belongs to the technical field of mechanical engineering sealing and solves the problem how to improve the pressure resistance capability of magnetic fluid sealing. The magnetic fluid sealing structure comprises a small end cover (5), a concentrating flux sleeve (1), an outer sleeve (8), a first magnetism isolating ring (9), first and second O-shaped sealing rings (11, 14), a second magnetism isolating ring (16), first and second bearings (6, 17), an adjusting washer (20), first and second pole shoes (10, 15), magnetic fluid (2), a permanent magnet (13) and a big end cover (19). In the magnetic fluid sealing structure, magnetic lubricating grease is respectively coated on the joint surface of the first pole shoe (11) and the permanent magnet (13) and on the joint surface of the second pole shoe (15) and the permanent magnet (13). The first magnetism isolating ring (9) and the second magnetism isolating ring (16) have the same structure and size and have thicknesses h of 2 to 10mm. Due to the selection of the widths l of the first and second magnetism isolating rings, the axial distances g of bearings and the pole shoes, which are positioned at both ends of the first and second magnetism isolating rings, are greater than or equal to 5mm and less than 15mm.

A radiation therapy System comprises a magnetic resonance imaging (MRI) apparatus and a linear accelerator capable of generating a beam of radiation. The linear accelerator is immersed in and oriented with respect to the MRI magnetic field to expose the linear accelerator to magnetic force that directs particles therein along a central axis thereof.

Described here is an automated robotic device that isolates circulating tumor cells (CTCs) or other biological structures with extremely high purity. The device uses powerful magnetic rods covered in removable plastic sleeves. These rods sweep through blood samples, capturing, e.g., cancer cells labeled with antibodies linked to magnetically responsive particles such as superparamagnetic beads. Upon completion of the capturing protocol, the magnetic rods undergo several rounds of washing, thereby removing all contaminating blood cells. The captured target cells are released into a final capture solution by removing the magnetic rods from the sleeves. Additionally, cells captured by this device show no reduced viability when cultured after capture. Cells are captured in a state suitable for genetic analysis. Also disclosed are methods for single cell analysis. Being robotic allows the device to be operated with high throughput.

The invention discloses a near-field plume mass-spectroscopic diagnostic E*B probe based on the Faraday cup and belongs to the technical field of plasma mass-spectroscopic diagnosis. The probe mainly applied to measuring near-field plumes of an ion thruster and of a Hall thruster comprises a central frame, ferrite permanent magnets, a flat electrode plate, an electrode plate holder, a collimator tube, a drift tube, a Faraday cup, six carbon steel shells and an anti-sputtering heat-insulating layer. According to the connectional relation, the central frame is used as a core part, the ferrite permanent magnets are distributed on upper and lower surfaces of the central frame, the electrode plate is fixed in the central frame, and an orthogonal electromagnetic field area is formed. The six carbon steel shells are used for packaging, and the front ends of the shells are coated with an anti-sputtering heat-insulating layer. The collimator tube of stainless steel and the drift tube are fitly fixed to the centers of two ends of the central frame through shaft holes. Ions different in valence are screened by adjusting voltage among the electrode plates, univalent and bivalent ion currents are acquired with the Faraday cup of aluminum, and the ratio of near-field plum bivalent ions is acquired by analytical computing.

A pseudo surface microwave produced plasma shielding system is a simple device that creates a prescribed plasma environment with a prescribed plasma density gradient, and protects an object surrounded by this environment as a shield. Pseudo surface microwaves interacting with an artificial intelligence equipped on board are used to create and to adjust this plasma environment for a particular application. This plasma environment provides potential capabilities of military applications of the plasma in the system. Examples of military applications include a stealth system from RADAR and SONAR, a protection system from WMD, and a weapon system to generate and launch plasmoids as a plasma gun. The scope of this invention extends to commercial applications of this plasma shielding system as a conditioned and controlled flow field, for example, a boundary layer and turbulence control system, and a lift control system to improve flight performance and flight economy of aircrafts. It further extends to develop a concept of a new type of engine using this plasma shielding system as a heating method alternative to the conventional combustion method that uses petroleum based fuel in the combustion chamber of an engine.

A VLF beacon operates in the near field of the antenna, providing a low impedance (magnetic) wave located by employing simple amplitude gradient and phase alignment direction finding (DF) methods. When rotated, the beacon antenna radiates its signal with little attenuation. Beacon antennas include a loop antenna which has a 1 / r3 B-field amplitude relationship with distance. The antenna radiation range is limited, but the detectable near field signal is strong. The receiver comprises a simple 2-channel RF front end with filtering and an A / D converter. The antenna for each channel is a much smaller ferrite rod loaded loop.

The invention relates to a double-disk type magnetorheological clutch which comprises a driving disk, a driven disk, a magnetorheological fluid, a transmission shaft, a rotating blade, a magnetic conduction shell, a magnet exciting coil, an insulation ring, a fluid inlet, a fluid outlet, a bearing and a sealing element, wherein the driving disk is connected to a driving shaft; the driven disk is connected to a driven shaft; the magnetorheological fluid is filled between primary and secondary magnetic conduction disks through the fluid inlet; a sealing ring device is rotated so as to keep the magnetorheological fluid between the two disks; the magnet exciting coil is fixed in the magnetic conduction shell with no need of an electric brush; and the magnetorheological fluid is sealed between the two disks, and the rotating blade is arranged on the transmission shaft. The rotating blade is rotated under the driving of the transmission shaft, so air is guided to circularly flow through an air vent, and the excellent radiating property is maintained. The double-disk type magnetorheological clutch has the advantages of compact structure and good radiation property, and can be used for natural air cooling.

The present invention discloses methods and magnetic material composites capable of withstanding one or more loads without the need for a substructure to provide structural support thereto. The magnetic composites are formable from composites such as epoxies, resins, plastics and the like together with rare earth or other magnetic or magnetizable compounds, or magnetic nano-particles to form structural magnetic composites. The magnetic composites have one or more portions with an aggregation of the magnetic material and one or more portions free of or substantially free of the magnetic material. The magnetic composites are suitable for use to form components of electrical motors, generators, pumps, fans, paints, coatings and parts or derivatives thereof.

Embodiments of the invention provide a magnetic head which can suppress broadening of the magnetic field distribution in the track-width direction without reducing the magnetic field intensity. In one embodiment, a main pole is composed of a pole tip having a part providing a write-track width, and a yoke part recessed from the air bearing surface in the element-height direction, where the trailing side surface of the pole tip is made as an asymmetric structure with respect to the track center.

The invention provides a hybrid excitation generator with permanent and electromagnetic series magnetic fields, and belongs to the technical field of automobile motor electric appliances. The hybrid excitation generator consists of a rotor, a stator, a front end cover, a back end cover and an electronic voltage regulation controller, wherein a radial permanent magnetic field and a salient pole electromagnetic field share the same rotor iron core; a generated magnetic field is formed through series connection in an air gap of the generator, the magnetic field intensity is high, and the power density of the generator is high; and during operation, the magnitude and the direction of the energization current of a salient pole electrical excitation rotor are adjusted to ensure that the magnetic field which is formed by superimposing the permanent magnetic field and an electrical excitation magnetic field is adjustable, the output voltage in a wide rotating speed and wide load range is kept stable, and a direct current power supply is provided for modern automobile electrical equipment.

The invention discloses an efficient purification method for quartz sand. In the method, two-section smashing (rough smashing and fine smashing) and ore milling with a rod mill are adopted, so that the production capacity is increased greatly, unit energy consumption is lowered, and the method is suitable for large-scale production. A method for removing weakly-magnetic minerals and intergrowth quartz with high iron content from quartz sand through advanced ore washing and weakly magnetic-high gradient strongly magnetic combined magnetic separation before ore milling is adopted, so that the purity of quartz sand is increased greatly. The method has the advantages of simple process flow, easiness for operating, low cost, high purification efficiency, stable performance and environmental friendliness of a produced product, no use of any chemical substance in an entire production process, no production of any waste water, waste residues and waste gas, true realization of zero emission, no production of waste and prevention of pollution. The method is not limited by the production scale, various quartz sand products of low, medium and high grades can be produced, the enterprise profit can be maximized, and the method has a wide application prospect on the aspect of purification of quartz sand.

When a substrate 30 is to be subjected to a magnetron plasma process, a dipole ring magnet 21 is provided, in which a large number of anisotropic segment magnets 22 are arranged in a ring-like shape around the outer wall of a chamber 1. A magnetic field gradient, wherein the magnetic field strength decreases from the E pole side toward the W pole side in a direction perpendicular to a magnetic field direction B, is formed in a plane perpendicular to the direction of an electric field between a pair of electrodes separated from each other. The anisotropic segment magnets have a first section a including anisotropic segment magnets arranged in the vicinity of a region A located outside an E pole side end of the process substrate with an N pole thereof being directed toward this region, and a second portion b including anisotropic segment magnets arranged with an S pole thereof being directed toward this region, to locally increase the magnetic field strengths of the first and second regions.

The present invention relates to a transmitting device for wireless power transmission, which includes: a bowl-shaped transmitting device body; and a transmitting coil unit for wirelessly transmitting power to a receiving device based on power supplied from a power source. The transmitting coil unit may include a multi-loop coil unit wound in the bottom surface of the transmitting device body, and a helical coil unit wound around the side wall of the transmitting device body, the helical coil unit being wound to increase the radius of a coil loop in a direction to the upper part of the transmitting device body, and being extended from the end of the multi-loop coil unit.

The invention discloses a double-flexible-grinding-head magnetorheological polishing device. In the device, a vertical gantry of a bed body and an X-axis are both fixed on a horizontal base; a worktable is fixed on a sliding block of the X-axis; a Y-axis is fixed on a horizontal beam of the vertical gantry; and a first Z-axis and a second Z-axis are arrangedon the Y-axis in parallel. A large flexible grinding head is installed on the first Z-axis; and a small flexible grinding head is arranged on the second Z-axis. A high-flow circulation system connected with the large flexible grinding head and a low-flow circulation system connected with the small flexible grinding head are arranged on a trolley. A control cabinet is arranged at the rear part of the vertical gantry; and a circulation system cabinet and a cleaning system are arranged at the side surface of the vertical gantry. The double-flexible-grinding-head magnetorheological polishing device provided by the invention has the advantages of high accuracy, high rigidness, high stability and high dynamic property. The double-flexible-grinding-head magnetorheological polishing device not only can be used for processing of large-caliber phase elements, but also can be used for high-accuracy processing of large-caliber planar optical elements within the range of full caliber. The optimal matching of the processing efficiency and the processing accuracy can be realized.

A bushing-type permanent magnetic impeller shaft bleeding pump, which is used for heart boosting and the boosting method of the bleeding pump are provided. A rotor of the bleeding pump is a whole magnetic impeller or an impeller with magnetic vanes, which greatly improves a magnetic field intensity of a bleeding pump air gap. A defending, a packing and a biochemical treatment are taken on the surface of the impeller. A tube cavity of the bleeding pump is made from a material with good blood compatibleness. A pre-diversion system structure is simplified, and a pre-diversion wimble is supported by a single cantilever, which are all in favor of preventing a thrombosis. The boosting method adopts a serial-type connection of an axial bleeding pump and ventricles of heart (left ventricle, right ventricle or double ventricles) and requests that an appearance of the bleeding pump is a geometrical shape of as ascending aorta or a main pulmonary artery which is fit for implantation, and the tube cavity and an artificial blood vessel caliber match with a natural blood vessel. In order to prevent a pumping action of the bleeding pump reduces a perfusion pressure of a coronary artery, a coronary artery and aorta bypass transplantation can be performed.

In some aspects of the invention, an n-type field-stop layer can have a total impurity of such an extent that a depletion layer spreading in response to an application of a rated voltage stops inside the n-type field-stop layer together with the total impurity of an n− type drift layer. Also, the n-type field-stop layer can have a concentration gradient such that the impurity concentration of the n-type field-stop layer decreases from a p+ type collector layer toward a p-type base layer, and the diffusion depth is 20 μm or more. Furthermore, an n+ type buffer layer of which the peak impurity concentration can be higher than that of the n-type field-stop layer at 6×1015 cm−3 or more, and one-tenth or less of the peak impurity concentration of the p+ type collector layer, can be included between the n-type field-stop layer and p+ type collector layer.

The present invention provides a space rotating magnetic field generating device of random rotating axle, the coil part (2) is three groups pairwise orthogonal Helmholtz coils, every group coil is made up of three groups winding Helmholtz coils, and three groups coil connect each phase of three-phase current respectively. According to parameter of rotating magnetic field (1) required by user, rotating axle direction angle Theta, Phi determines initial position of rotating magnetic field Gamma, angular frequency of rotating magnetic field Omega and amplitude of rotating magnetic field B0, CPU (311) obtains variation magnetic field produced by three groups coils: BX,BYand BZ, and obtains impulse width and frequency of corresponding modulating signal, three groups waveform generators (312) of control power source part (3) inversion produce three groups three-phase current, supply for three groups coils, and produces three direction variation magnetic field. The required rotating magnetic field (1) is obtained after the three variation magnetic fields are overlapped in space. Impulse width and frequency of every waveform generator (312) modulating signal can be adjusted for changing rotating axle of rotating magnetic field, amplitude, frequency and initial position.

Methods and apparatus for increasing the efficiency of a voice coil motor (VCM) are disclosed. According to one aspect of the present invention, a cylindrical and radially symmetric VCM includes a plurality of sets of magnets, and a single coil. The plurality of sets of the magnets are each arranged in an array configuration, and cooperate to form a magnetic field. The coil receives current and has a plurality of windings. A first space is defined within the coil, and the plurality of sets of the magnets are arranged such that a first set of the magnets is positioned within the first space and a second set of the magnets is positioned external to the coil.