31 results about "Split magnet" patented technology

A radiation therapy system comprises a magnetic resonance imaging (MRI) system combined with an irradiation system, which can include one or more linear accelerators (linacs) that can emit respective radiation beams suitable for radiation therapy. The MRI system includes a split magnet system, comprising first and second main magnets separated by gap. A gantry is positioned in the gap between the main MRI magnets and supports the linac(s) of the irradiation system. The gantry is rotatable independently of the MRI system and can angularly reposition the linac(s). Shielding can also be provided in the form of magnetic and / or RF shielding. Magnetic shielding can be provided for shielding the linac(s) from the magnetic field generated by the MRI magnets. RF shielding can be provided for shielding the MRI system from RF radiation from the linac.

An integrated, multi-modality imaging technique is disclosed. The embodiment described combines a split-magnet MRI system with a digital x-ray system. The two systems are employed together to generate images of a subject in accordance with their individual physics and imaging characteristics. The images may be displaced in real time, such as during a surgical intervention. The images may be registered with one another and combined to form a composite image in which tissues or objects difficult to image in one modality are visible. By appropriately selecting the position of an x-ray source and detector, and by programming a desired corresponding slice for MRI imaging, useful combined images may be obtained and displayed.

A radiation therapy system comprises a magnetic resonance imaging (MRI) system combined with an irradiation system, which can include one or more linear accelerators (linacs) that can emit respective radiation beams suitable for radiation therapy. The MRI system includes a split magnet system, comprising first and second main magnets separated by gap. A gantry is positioned in the gap between the main MRI magnets and supports the linac(s) of the irradiation system. The gantry is rotatable independently of the MRI system and can angularly reposition the linac(s). Shielding can also be provided in the form of magnetic and / or RF shielding. Magnetic shielding can be provided for shielding the linac(s) from the magnetic field generated by the MRI magnets. RF shielding can be provided for shielding the MRI system from RF radiation from the linac.

A magnetic resonance imaging (MRI) system includes a split magnet system having a pair of MRI magnet housings separated by gap. A pair of main MRI magnets are disposed within respective MRI magnet housings. A plurality of buttress assemblies are attached to the MRI magnet housings. Some or all of the buttress assemblies are provided with removable connections to the MRI magnet housings. This allows for partial disassembly of the MRI system for improved transport and maneuverability for relocating the MRI system. The MRI system can include a gantry in the gap for supporting a radiation therapy system. Also, the removably buttress assemblies can be used for housing conduits, such as electrical and fluid conduits, between the pair of MRI magnet housings.

This invention is a manufacturing device for a permanent magnet disposed in a rotating electrical machine, in which a plurality of magnet pieces, each formed by being fractured and split along a notch groove, are aligned and joined to each other with an adhesive interposed between fractured surfaces. First pressing means for aligning the plurality of fractured and split magnet pieces with the fractured surfaces opposed to each other in a width direction by pressing from the width direction of the permanent magnet and second pressing means for aligning the plurality of magnet pieces in a thickness direction by pressing from a thickness direction of the permanent magnet are provided. Moreover, third pressing means for joining the opposing fractured surfaces of the magnet piece with the interposed adhesive by pressing the plurality of magnet pieces from a longitudinal direction of the permanent magnet is provided.

In a nuclear magnetic resonance spectrometer, the shape of a detection coil is changed from a conventional cage type to a solenoid type of higher sensitivity. Accordingly, differing from the conventional superconductive magnet of multilayer air core solenoids, a superconductive magnet is right and left divided to split magnets for generating 11 T, preferably, 14.1 T in the horizontal direction, and the magnetic field uniformity is set to 0.001 ppm or less and the temporal stability is set to 0.001 ppm or less.

A split magnet ring (70), particularly useful in a magnetron plasma reactor (10) for sputter depositing tantalum, tungsten, or other barrier metal into a via and also resputter etching the deposited material from the bottom of the via onto the via side walls. The magnet ring includes two annular magnet rings (72, 74) composed of the same axial polarity separated by a non-magnetic spacing (76) of at least the axial length of one magnet and associated pole faces. A small unbalanced magnetron (36) rotates about the back of the target (16) having an outer pole (42) of the same polarity as the ring magnets (72, 74) surrounding a weaker inner pole (40) of the opposite polarity.

A loudspeaker can provide magnetic flux from polarity-aligned split magnets to drive voice coils and generate sound. The loudspeaker may have reduced stray magnetic fields and a BL curve with symmetric and linear characteristics. The loudspeaker can include a core, split magnets, a magnet housing, a core cap, and a voice coil gap formed between the magnet housing and the core cap. Magnetic flux produced by the split magnets may be combined, directed, and / or concentrated by the core cap and magnet housing within the voice coil gap. At least portions of a voice coil may be positioned within the voice coil gap and a diaphragm may be coupled to the voice coil. A bucking magnet assembly may contain a magnetic flux of the magnet structure to further improve performance. The bucking magnet assembly may include split magnets with an aligned polarity that is opposite the polarity of the magnet structure.

A supersensitive nuclear magnetic resonance imaging apparatus includes superconducting magnet, a gradient magnetic field coil, a high frequency emitting coil, and a receiving coil, wherein a biosample, including at least one of cells, organic tissues, and laboratory small animals, is inserted in a sample chamber of generally 1 to 30 mm in diameter. The superconducting magnet is formed of laterally divided split magnets, and the direction of the magnetic field generated by the magnet is generally horizontal. The receiving coil is in the form of a solenoid coil, and the biosample is inserted from a direction orthogonal to the direction of the magnetic field in a generally vertical direction. The spatial resolution in imaging of the biosample is not more than one-tenth of a cell that forms the biosample.

This invention is a manufacturing device for a permanent magnet disposed in a rotating electrical machine, in which a plurality of magnet pieces, each formed by being fractured and split along a notch groove, are aligned and joined to each other with an adhesive interposed between fractured surfaces. First pressing means for aligning the plurality of fractured and split magnet pieces with the fractured surfaces opposed to each other in a thickness direction by pressing from the thickness direction of the permanent magnet, second pressing means for aligning the plurality of magnet pieces in a width direction by pressing from a width direction of the permanent magnet are provided. Moreover, third pressing means for joining the opposing fractured surfaces of the magnet piece with the interposed adhesive by pressing the plurality of magnet pieces from a longitudinal direction of the permanent magnet.

Provided are a sintered magnet capable of reducing eddy-current loss markedly as compared with a conventional split magnet, accommodating a variety of shapes and dimension variation and reducing the manufacturing cost markedly while having a desired coercive force, and a method for producing the sintered magnet. A sintered magnet (10) is a rectangular parallelepiped or a cube having the length of one side in the range of 1-10 mm, wherein a single base magnet (1) of the same shape or a plurality of base magnets (1,...) having different shapes are arranged, respectively, in the longitudinal and lateral directions forming a plane and in the height direction intersecting the plane perpendicularly, and junction between the base magnets (1, 1) is maintained by the magnetic force of at least adjoining base magnets (1, 1).

A cryostat apparatus including a cooler configured to cool a cryogenic fluid. The cooler includes a cooler chamber disposed about a cooler axis. A magnet assembly is in thermodynamic communication with the cooler and is disposed about a magnet axis offset from the cooler axis. The magnet assembly includes a magnet housing and first and second annular magnet coils disposed about the magnet axis within the magnet housing. A viewing chamber is at least partially located between the first and second magnet coils, such that the magnet axis and a viewing axis perpendicular to the magnet axis both pass through the viewing chamber, with the viewing axis extending between the first and second magnet coils. The first annular magnet coil includes a first conical surface disposed about the magnetic axis and having minimum and maximum peripheries, the minimum periphery being disposed adjacent the viewing chamber.

A voice coil motor 2 using a Dual Halbach Magnet Array has an outer magnet array 5 and an inner magnet array 6, wherein the inner magnet array 6 comprises axially magnetized magnets 6A, 6C and 6E and radially magnetized magnets 6B and 6D. Each of the axially magnetized magnets 6A, 6C and 6E of an inner magnet array 6 is formed of a monolithic magnet having ring-shape, whereas each of the radially magnetized magnets 6B and 6D of the inner magnet array 6 is formed of a plurality of split magnets divided in a circumferential direction. A fixing means 13 is provided to fix the radially magnetized magnets 6B and 6D and the axially magnetized magnets 6A, 6C and 6E of the inner magnet array 6 in an axially clamped manner.

A loudspeaker can provide magnetic flux from polarity-aligned split magnets to drive voice coils and generate sound. The loudspeaker may have reduced stray magnetic fields and a BL curve with symmetric and linear characteristics. The loudspeaker can include a core, split magnets, a magnet housing, a core cap, and a voice coil gap formed between the magnet housing and the core cap. Magnetic flux produced by the split magnets may be combined, directed, and / or concentrated by the core cap and magnet housing within the voice coil gap. At least portions of a voice coil may be positioned within the voice coil gap and a diaphragm may be coupled to the voice coil. A bucking magnet assembly may contain a magnetic flux of the magnet structure to further improve performance. The bucking magnet assembly may include split magnets with an aligned polarity that is opposite the polarity of the magnet structure.

The invention provides an MRI guided robot radiation treatment system. The system comprises a linear accelerator and magnetic resonance imaging equipment, wherein the magnetic resonance imaging equipment has split magnets used for constructing a magnetic field, a treatment space is formed among the split magnets, the linear accelerator is mounted on a robot and is carried by the robot to do motion so as to make rays align at an isocenter point to radiate from the treatment space, an axis of the treatment space passes through the isocenter point, an initial direction of the axis of the treatment space and an axis of a treatment bed are parallel, the split magnets can rotate around an axis which is perpendicular to the ground and passes through the isocenter point and can further rotate around the axis of the treatment space, the linear accelerator and the split magnets are carried by the robot to realize synchronous rotation, and the rays are made to radiate the isocenter point in different directions. The system is advantaged in that isocenter and non-coplanar treatment for patients can be realized, a focus-skin ratio is high, and damage to the patients can be reduced.

The present invention can provide a motor comprising: a rotary shaft; a yoke coupled to the rotary shaft; a stator disposed between the rotary shaft and the yoke; a first magnet and a second magnet disposed at the yoke; and a circuit board on which a first hall sensor disposed to correspond to the first magnet and a second hall sensor disposed to correspond to the second magnet are disposed, wherein the second magnet includes a plurality of split magnets and one index magnet, the circumferential width of the split magnet is the same as the circumferential width of the index magnet, the split magnet and the index magnet are respectively formed by combining a first pole and a second pole, the circumferential width of the first pole of the split magnet is the same as the circumferential width of the second pole thereof, and the circumferential width of the first pole of the index magnet is different from the circumferential width of the second pole thereof.

The invention discloses a shunt magnet roadblock with a liner, which is characterized in that it comprises a first body, two magnets, and two grooves; a cross section of the first body in the vertical direction is rectangular, and the The magnets are located on both sides of the first body, a cross section of the magnets in the vertical direction is rectangular, and the first body is coated with luminous paint. The present invention can be used in combination to make the combined roadblocks more stable. At present, the roadblocks used on the road are often displaced due to impact or wind blowing. The present invention can effectively solve this problem, so the present invention has great advantages. Strong application prospects, the invention is coated with luminous paint, so that people can still see bright light at night when there is no light, which enhances safety and has strong application prospects.

A cryostat apparatus including a cooler configured to cool a cryogenic fluid. The cooler includes a cooler chamber disposed about a cooler axis. A magnet assembly is in thermodynamic communication with the cooler and is disposed about a magnet axis offset from the cooler axis. The magnet assembly includes a magnet housing and first and second annular magnet coils disposed about the magnet axis within the magnet housing. A viewing chamber is at least partially located between the first and second magnet coils, such that the magnet axis and a viewing axis perpendicular to the magnet axis both pass through the viewing chamber, with the viewing axis extending between the first and second magnet coils. The first annular magnet coil includes a first conical surface disposed about the magnetic axis and having minimum and maximum peripheries, the minimum periphery being disposed adjacent the viewing chamber.

A rotor production method includes: a first step of arranging a plurality of sintered bodies side by side with an insulating lubricant applied to an interface of at least one of the sintered bodies adjacent to each other, and then housing the sintered bodies in a cavity of a molding die such that the sintered bodies are arranged side by side in the cavity, the sintered bodies being precursors of a plurality of split magnets constituting one rare-earth magnet; a second step of turning the sintered bodies into the split magnets by performing hot working to impart magnetic anisotropy to the sintered bodies arranged in the cavity, and producing an integrated magnet in which the split magnets are integrated together with the lubricant interposed therebetween; and a third step of producing a rotor of a motor by inserting the integrated magnet into a magnet slot of the rotor.

The invention provides an electromagnetic disc of an electromagnetic heating lifting hot pot. The electromagnetic disc comprises an annular electromagnetic wire disc; a coil is arranged on the upper surface of the electromagnetic wire disc; a plurality of first magnets which are arranged in a surrounding manner are arranged at the bottom of the electromagnetic wire disc; a plurality of connecting blocks which are arranged in an annular manner are arranged between the outer ring of the electromagnetic wire disc and the inner ring of the electromagnetic wire disc; a groove is formed in the top of the inner ring of the electromagnetic wire disc; a second magnet is arranged in the groove; containing cavities matched with the first magnets are formed in the bottom of the connecting block in the direction from the outer ring of the electromagnetic wire disc to the inner ring of the electromagnetic wire disc; the first magnets are assembled in the containing cavities respectively; the first magnets and the second magnet conduct surrounding magnetic field protection on the inner ring of the electromagnetic wire disc; a magnetic field isolation area is formed in the inner ring of the electromagnetic wire disc, so that the magnetic disorder phenomenon caused by split magnets is avoided; when a lifting motor penetrates through the electromagnetic wire disc, magnetic strips conduct magnetic shielding on the periphery of the lifting motor, the magnetic field effect of magnetic disorder of the electromagnetic wire disc on the lifting motor is prevented, and the performance of the lifting motor is prevented from being affected.

An electromagnetic heating lifting hot pot comprises a hot pot, a hot pot body and a hot pot cover. A lifting mechanism used for driving a hot pot lifting disc to ascend and descend is arranged in the hot pot, an electromagnetic disc is arranged in the hot pot and comprises an annular electromagnetic wire coil, a coil is arranged on the surface of the electromagnetic wire coil, and a lifting motor of the lifting mechanism is arranged in the electromagnetic wire coil in a penetrating mode. A plurality of L-shaped magnetic strips are arranged at the bottom of the electromagnetic wire coil in a surrounding mode, a plurality of containing cavities matched with the magnetic strips are formed in the bottom of the electromagnetic wire coil in a surrounding mode, the sides, close to the inner edge of the electromagnetic wire coil, of the containing cavities penetrate upwards and extend to the upper surface of the electromagnetic wire coil to form L-shaped containing cavities, and the magnetic strips are assembled in the containing cavities respectively. Thus, the assembled magnetic strips perform surrounding magnetic field protection on the inner ring of the electromagnetic wire coil, the phenomenon of disordered magnetism caused by the split magnets is avoided, when the lifting motor is arranged in the electromagnetic wire coil in a penetrating mode, the magnetic strips perform magnetic shielding on the periphery of the lifting motor, the disordered magnetism is prevented from generating a magnetic field effect on the lifting motor, and the performance of the lifting motor is prevented from being affected.

A rotor production method includes: a first step of arranging a plurality of sintered bodies side by side with an insulating lubricant applied to an interface of at least one of the sintered bodies adjacent to each other, and then housing the sintered bodies in a cavity of a molding die such that the sintered bodies are arranged side by side in the cavity, the sintered bodies being precursors of a plurality of split magnets constituting one rare-earth magnet; a second step of turning the sintered bodies into the split magnets by performing hot working to impart magnetic anisotropy to the sintered bodies arranged in the cavity, and producing an integrated magnet in which the split magnets are integrated together with the lubricant interposed therebetween; and a third step of producing a rotor of a motor by inserting the integrated magnet into a magnet slot of the rotor.