Magnetic box generating parallel and homogenous magnetic field
A technology of uniform magnetic field and magnetic box, applied in the direction of magnets, magnetic objects, measuring magnetic variables, etc., can solve the problems of complex structure, relative uneven distribution of magnetic field, etc., and achieve the effect of large magnetic field strength, simple structure and stable magnetic force
Inactive Publication Date: 2012-08-08
诸暨意创磁性技术有限公司
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In addition, a corresponding method for adjusting the static magnetic field is disclosed, using an additional shimming ring, or using multiple groups of permanent magnet units with different magnetic energy levels to construct a permanent magnetic field source, so that the magnetic energy of the units outside the center of the pole piece The magnetic energy level is higher than that of the inner unit, or the means of setting multiple magnetic or permanent magnetic bolts on the device to adjust the field strength of the static magnetic field. The magnetic field generated by this kind of device is relatively uneven and the structure is more complicated.
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[0013] Such as figure 1 , figure 2 A magnetic box that generates a parallel uniform magnetic field as shown includes two inner magnetic pole plates 4 connected by a support column 5 between the two inner magnetic pole plates 4; permanent magnets are arranged on the outside of the two inner magnetic pole plates 4 relative to the support column 5 2. The outside of the permanent magnet 2 is connected to the outer magnetic pole plates 3, and the frame of the yoke 1 is connected to the above two outer magnetic pole plates 3. The support column 5 is a non-magnetic material. The magnetic circuit generated by this kind of magnetic box is: inner magnetic pole plate 4→another inner magnetic pole plate 4→permanent magnet 2→outer magnetic pole plate 3→yoke 1→another outer magnetic pole plate 3→another permanent magnet 2→inner The magnetic pole plate 4 completes the magnetic circuit. A parallel and uniform magnetic field is generated between the inner magnetic pole plate 4→another inne...
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The invention discloses a magnetic box generating parallel and homogenous magnetic field. The magnetic box comprises two inner magnetic pole plates, wherein the two inner magnetic pole plates are connected by a support pillar; the two inner magnetic pole plates are provided with permanent magnets relative to the outer sides of the support pillar; outer magnetic pole plates are connected outside the permanent magnets; and magnetic yokes are connected with the two outer magnetic pole plates through framing. The magnetic yokes frame the two outer magnetic pole plates, the permanent magnets at the inner sides of the outer magnetic pole plates, the two inner magnetic pole plates and the support pillar to form the compact magnetic box structure to generate parallel and homogenous magnetic field, thus the magnetic box not only has high strength and stable magnetic force, but also has simple structure.
Description
technical field [0001] The invention relates to a device for generating a magnetic field, in particular to a magnetic box for generating a parallel uniform magnetic field. Background technique [0002] Devices that generate magnetic fields are currently widely used in industry, science and technology, teaching and other fields, and are also used in imaging devices such as magnetic resonance. Generally, a stable and strong magnetic field is required. The greater the magnetic field strength, the better the imaging effect. Generally, existing devices for generating a magnetic field need larger magnets to generate a magnetic field of more than 400 mT, and the equipment is bulky and difficult to move. [0003] Chinese Invention Patent No. 03136672.4 discloses a static magnetic field generating device in a magnetic resonance device. A second shim ring is attached to the outer edge of the first shim ring; multiple sets of permanent magnet units with different magnetic energy levels...
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IPC IPC(8): H01F7/00G01R33/383G01R33/3873
Inventor 李和良吴伟明李建成
Owner 诸暨意创磁性技术有限公司