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Magnetic field generator

A magnetic field generator and magnetic field technology, applied in the direction of permanent magnets, etc., can solve the problems of small magnetic field adjustable range, large magnetic flux leakage, etc., and achieve the effect of large magnetic field adjustment range, small volume, and less magnetic source consumption

Inactive Publication Date: 2013-08-14
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this variable magnetic field magnet is small in size and light in weight, the adjustable range of the magnetic field is small, and there is a large magnetic flux leakage.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0036] This embodiment provides a linear adjustable magnetic field generator, its structure is as follows figure 2 shown, including:

[0037] Two cylindrical permanent magnets 3, made of N48H high-performance NdFeB permanent magnet material, with a diameter of 14mm and a height of 6mm, are radially magnetized, and the radial magnetic field strength is about 0.58T;

[0038] Two strip-shaped magnetically conductive pole heads 5 each have a terraced pole head end 51, and the two pole head ends 51 are placed oppositely to generate a magnetic field in the air gap gap between the two pole head ends 51;

[0039] The first and second magnetically conductive yokes 4 and 6 are U-shaped, and the U-shaped bottom edge has a circular opening, and the above-mentioned two cylindrical permanent magnets 3 are respectively fixed in the two circular openings, and can Radial rotation, the two ends of the first and second magnetically permeable yokes 4 and 6 are respectively connected to two bar-...

Embodiment 2

[0045] This embodiment provides a linearly adjustable magnetic field generator, which includes the structure of the linearly adjustable magnetic field generator in Embodiment 1. The structure of the magnetic field generator provided by this embodiment is as follows Figures 7a-7c shown (with figure 2 In the same parts with the same reference numerals), as in figure 2 The outside of the structure of the magnetic field generator shown also includes:

[0046] Aluminum housing for housing such as figure 2 The magnetic field generator shown, the aluminum housing includes a frame part 2 and two side plate parts 1 (where Figure 7a and 7b Only one side plate 1 on the front side is shown in the figure), and the inner space of the aluminum housing is defined by the frame part 2 and the two side plate parts 1 to accommodate the magnetically permeable yoke 4, the permanent magnet 3 and the magnetically permeable poles The head 5, wherein the magnetically conductive yoke 4 is fixed...

Embodiment 3

[0050] This embodiment provides a linear adjustable magnetic field generator, its structure is as follows Figure 8 shown, including:

[0051] Cylindrical permanent magnet 33, radially magnetized;

[0052] Two strip-shaped magnetically conductive pole heads 35 have pole ends 351 respectively. The cross-section of the pole ends 351 is elliptical, and the two pole ends 351 are placed oppositely to generate a magnetic field in the air gap gap between the two pole ends 351;

[0053] U-shaped magnetic yoke 36, the U-shaped base has a circular opening, the above-mentioned cylindrical permanent magnet 33 is fixed in the circular opening, and can rotate radially, and the two ends of the magnetic yoke 36 are respectively Connected to two bar-shaped magnetically conductive pole heads 35, forming a closed magnetic flux loop with the two bar-shaped magnetically conductive pole heads 35, for conducting the magnetic field of the cylindrical permanent magnet 33 to the air gap gap between th...

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Abstract

The invention provides a magnetic field generator. The magnetic field generator comprises at least two magnetism-conductive pole heads provided with pole head ends respectively, at least one magnetic source and at least one magnetism-conductive magnetic yoke, wherein the at least two magnetism-conductive pole heads are placed in such a mode that the pole head ends are opposite to each other, and air gaps are formed between the pole head ends; the at least one magnetism-conductive magnetic yoke is used for conducting magnetic fields generated by the at least one magnetic source to the at least two magnetism-conductive pole heads so as to generate magnetic fields in the air gaps; and the at least one magnetic source can rotate relative to the at least one magnetism-conductive magnetic yoke, and when the at least one magnetic source rotates from a first position to a second position, fluxes conducted in the at least one magnetism-conductive magnetic yoke are different in size.

Description

technical field [0001] The invention relates to a magnetic field generator, in particular to a large-scale linear adjustable small-scale strong magnetic field generator. Background technique [0002] As an important parameter, magnetic field plays an important role in the preparation and performance measurement of materials. Electromagnets and superconducting magnets are currently commonly used variable magnetic field devices in laboratories, but these two devices have the problems of complex devices, bulky volume, heavy weight, large energy consumption, and high cost. In addition, when an external magnetic field needs to be introduced during the preparation or testing of materials, these two devices are inconvenient when combined with other experimental equipment or testing instruments due to their complex devices and bulky volume. [0003] figure 1 The Japanese patent No. JP2000-277323A shown provides a "variable magnetic field magnet", in which the iron cores 1, 2 arran...

Claims

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Application Information

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IPC IPC(8): H01F7/02
Inventor 邵晓萍陆俊沈保根
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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