阅读说明：本技术 磁力线的矫正方法 (Method for correcting magnetic force lines ) 是由 王朝辉 高岗 王巍 于 2021-01-07 设计创作，主要内容包括：本发明公开了一种磁力线的矫正方法,应用于铁基或鈷基纳米晶磁芯的磁力线矫正,包括以下步骤：S1,获取至少两个铁质的矫正件和至少一个待矫正磁芯,其中,所述矫正件和待矫正磁芯的形状相同,按待矫正磁芯位于矫正件之间的顺序,将矫正件和待矫正磁芯依次叠放,使各矫正件和各待矫正磁芯相邻的侧面均平行且相等；S2,将各待矫正磁芯加热至第一预设温度,并保温；S3,将沿叠放方向的磁力线依次穿过矫正件和磁芯,直至磁芯矫正完成；S4,将磁芯加热的温度降低至第二预设温度。能够对铁基或鈷基纳米晶磁芯进行矫正,且能够将磁芯的磁畴矫正至平行。本发明应用于磁芯技术领域。(The invention discloses a method for correcting magnetic force lines, which is applied to the correction of the magnetic force lines of an iron-based or cobalt-based nanocrystalline magnetic core and comprises the following steps: s1, obtaining at least two iron correcting pieces and at least one magnetic core to be corrected, wherein the correcting pieces and the magnetic core to be corrected are identical in shape, and the correcting pieces and the magnetic core to be corrected are sequentially stacked according to the sequence that the magnetic core to be corrected is positioned between the correcting pieces, so that the adjacent side surfaces of the correcting pieces and the magnetic core to be corrected are parallel and equal; s2, heating each magnetic core to be corrected to a first preset temperature, and preserving heat; s3, magnetic lines of force along the stacking direction sequentially pass through the correcting piece and the magnetic core until the magnetic core is corrected; and S4, reducing the heating temperature of the magnetic core to a second preset temperature. The iron-based or cobalt-based nanocrystalline magnetic core can be corrected, and the magnetic domains of the magnetic core can be corrected to be parallel. The invention is applied to the technical field of magnetic cores.)

1. A method for correcting magnetic force lines is characterized by being applied to correcting magnetic force lines of an iron-based or cobalt-based nanocrystalline magnetic core and comprising the following steps of:

s1, obtaining at least two iron correcting pieces and at least one magnetic core to be corrected, wherein the correcting pieces and the magnetic core to be corrected are identical in shape, and the correcting pieces and the magnetic core to be corrected are sequentially stacked according to the sequence that the magnetic core to be corrected is positioned between the correcting pieces, so that the adjacent side surfaces of the correcting pieces and the magnetic core to be corrected are parallel and equal;

s2, heating each magnetic core to be corrected to a first preset temperature, and preserving heat;

s3, magnetic lines of force along the stacking direction sequentially pass through the correcting piece and the magnetic core until the magnetic core is corrected;

and S4, reducing the heating temperature of the magnetic core to a second preset temperature.

2. The method for correcting magnetic force lines according to claim 1, wherein in step S1, the correcting member and the magnetic core to be corrected are both annular, and the correcting member and the magnetic core to be corrected are fitted over the non-magnetic fixing rod.

3. The method for correcting magnetic force lines according to claim 2, wherein the correcting member and the magnetic core to be corrected are circular rings, and the fixing rod is a circular rod.

4. The method for correcting magnetic force lines according to claim 2, wherein the correcting member has a thickness of 20mm to 30 mm.

5. The method for rectifying magnetic force lines according to claim 4, wherein the thickness of the rectifying member is 20 mm.

6. The method for rectifying magnetic force lines according to any one of claims 1 to 5, wherein in step S2, the first predetermined temperature is 450 ℃ to 570 ℃.

7. The method for rectifying magnetic force lines according to any one of claims 1 to 5, wherein in step S3, a rated DC current is applied to the coil, and the coil generates magnetic force lines in the stacking direction to pass through the rectifying member and the magnetic core in sequence.

8. The method for correcting magnetic force lines according to any one of claims 1 to 5, wherein in step S4, the second predetermined temperature is lower than 350 ℃.

9. The method for correcting magnetic force lines according to any one of claims 1 to 5, wherein the correcting member is made of DT4 pure iron.

10. The method for correcting magnetic force lines according to any one of claims 1 to 5, wherein the number of the correcting members is two, the number of the cores to be corrected is at least two, and each core to be corrected is located between two correcting members.

Technical Field

The invention relates to the technical field of magnetic cores, in particular to a method for correcting magnetic lines of force.

Background

When the iron-based or cobalt-based nanocrystalline magnetic core is magnetized by a magnetic field in the same direction, when magnetic domains of the magnetic core are arranged in parallel, a magnetic hysteresis loop of the magnetic core tends to be flattened, and the magnetic characteristic parameters of the magnetic core have the advantages of small residual magnetism Br, small coercive force Hc, low magnetic loss Ps and the like.

In view of the above requirements, it is necessary to correct an iron-based or cobalt-based nanocrystalline magnetic core, and the magnetic lines of force of the magnetic field are arc-shaped, and if the magnetic core is directly corrected, the magnetic domains of the magnetic core cannot be corrected to be parallel.

Disclosure of Invention

Technical problem to be solved

A method for correcting magnetic force lines solves the technical problem that magnetic domains of an iron-based or cobalt-based nanocrystalline magnetic core cannot be corrected to be parallel when the iron-based or cobalt-based nanocrystalline magnetic core is corrected.

(II) technical scheme

In order to solve the technical problem, the invention provides a method for correcting magnetic force lines, which is applied to the correction of the magnetic force lines of an iron-based or cobalt-based nanocrystalline magnetic core and comprises the following steps:

s1, obtaining at least two iron correcting pieces and at least one magnetic core to be corrected, wherein the correcting pieces and the magnetic core to be corrected are identical in shape, and the correcting pieces and the magnetic core to be corrected are sequentially stacked according to the sequence that the magnetic core to be corrected is positioned between the correcting pieces, so that the adjacent side surfaces of the correcting pieces and the magnetic core to be corrected are parallel and equal;

s2, heating each magnetic core to be corrected to a first preset temperature, and preserving heat;

s3, magnetic lines of force along the stacking direction sequentially pass through the correcting piece and the magnetic core until the magnetic core is corrected;

and S4, reducing the heating temperature of the magnetic core to a second preset temperature.

In a further improvement, in step S1, the correcting element and the magnetic core to be corrected are both annular, and the correcting element and the magnetic core to be corrected are sleeved on the non-magnetic fixing rod.

In a further improvement, the correcting piece and the magnetic core to be corrected are circular rings, and the fixing rod is a round rod.

In a further improvement, the thickness of the correcting piece is 20 mm-30 mm.

In a further improvement, the thickness of the correction piece is 20 mm.

In a further modification, in step S2, the first preset temperature is 450 ℃ to 570 ℃.

In a further improvement, in step S3, a rated dc current is applied to the coil, and the coil generates magnetic lines of force in the stacking direction sequentially passing through the correction member and the magnetic core.

In a further modification, in step S4, the second preset temperature is lower than 350 ℃.

In a further improvement, the correcting element is made of DT4 pure iron.

In a further improvement, the number of the correcting pieces is two, the number of the magnetic cores to be corrected is at least two, and each magnetic core to be corrected is located between the two correcting pieces.

(III) advantageous effects

The correction method of the magnetic force lines can lead the magnetic force lines passing through the magnetic core to tend to be parallel through the correction of the correction piece when the magnetic core to be corrected is corrected, and lead the magnetic domains in the magnetic core to tend to be parallel when the magnetic core is corrected. Wherein, treat to correct the magnetic core and preheat to the first predetermined temperature with each magnetic core of treating correcting, make and treat that the magnetic core of correcting is fully heated. The first predetermined temperature may be obtained empirically or through multiple tests. And after all the magnetic cores are corrected, reducing the temperature of the magnetic cores to a second preset temperature, so that the magnetic domains of the magnetic cores are stably arranged.

The method for correcting the magnetic force lines can correct the iron-based or cobalt-based nanocrystalline magnetic core, can correct the magnetic domain of the magnetic core to be parallel, and has the advantages of simple operation, high correction efficiency and low correction cost.

Drawings

FIG. 1 is a schematic view of an orthotic and fixation bar according to one embodiment of the present invention;

FIG. 2 is a schematic diagram of the structure of the corrective member, the magnetic core and the fixing bar according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of magnetization correction of a method for correcting magnetic lines of force according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating the distribution of magnetic domains before the magnetization of the core to be corrected is corrected according to an embodiment of the present invention;

FIG. 5 is a diagram illustrating magnetic domain distribution after magnetic core magnetization correction according to an embodiment of the present invention;

FIG. 6 is a magnetic hysteresis loop of a magnetic core before magnetization correction according to an embodiment of the present invention

FIG. 7 is a diagram illustrating a magnetization curve of a magnetic core after magnetization correction according to an embodiment of the present invention.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 7, a method for correcting magnetic force lines, applied to correcting magnetic force lines of an iron-based or cobalt-based nanocrystalline magnetic core, includes the following steps:

s1, obtaining at least two iron correcting pieces 1 and at least one magnetic core 2 to be corrected, wherein the correcting pieces 1 and the magnetic cores 2 to be corrected are identical in shape, and the correcting pieces 1 and the magnetic cores 2 to be corrected are sequentially stacked according to the sequence that the magnetic cores 2 to be corrected are positioned between the correcting pieces 1, so that the adjacent side surfaces of the correcting pieces 1 and the magnetic cores 2 to be corrected are parallel and equal;

s2, heating each magnetic core 2 to be corrected to a first preset temperature, and preserving heat;

s3, magnetic lines of force 4 along the stacking direction sequentially pass through the correction piece 1 and the magnetic core 2 until the magnetic core 2 is corrected;

s4, the temperature of the magnetic core 2 is decreased to a second preset temperature.

In the method for correcting magnetic force lines of the present embodiment, by making the correction member 1 made of iron into the same shape as the magnetic core 2 to be corrected, when the magnetic core 2 to be corrected is corrected, the magnetic force lines passing through the magnetic core 2 can be made to be parallel by the correction of the correction member 1, and when the magnetic core 2 is corrected, the magnetic domains 21 in the magnetic core 2 can be made to be parallel. Wherein, to treat and rectify magnetic core 2 and preheat respectively treating to correct magnetic core 2 to first predetermined temperature, make and treat to correct magnetic core 2 and be heated fully. The first predetermined temperature may be obtained empirically or through multiple tests. After all the magnetic cores 2 are corrected, the temperature of the magnetic cores 2 is reduced to a second preset temperature, so that the magnetic domains 21 of the magnetic cores 2 are stably arranged.

The correction method of the magnetic force lines can correct the iron-based or cobalt-based nanocrystalline magnetic core 2, can correct the magnetic domain 21 of the magnetic core 2 to be parallel, and is simple to operate, high in correction efficiency and low in correction cost.

Specifically, the method for determining whether the correction of the magnetic core 2 is completed is as follows: and testing the magnetic core 2 close to the correcting part 1, testing the magnetic parameters, the magnetic conductivity, the hysteresis loop and other data, and if the magnetic core 2 close to the correcting part 1 is judged to be corrected, finishing the correction of all the magnetic cores 2. In steps S2 to S4, the magnetic core 2 or the magnetic core 2 to be corrected is heated and kept warm in the heating furnace 5, the heating furnace 5 is strip-shaped, a plurality of groups of correction pieces 1 can be placed in the heating furnace, and a plurality of magnetic cores 2 to be corrected can be placed between each group of correction pieces 1, so that a plurality of magnetic cores 2 to be corrected can be corrected simultaneously, batch correction can be realized, and correction efficiency is high. As shown in fig. 4 to 5, the magnetic domains 21 of the magnetic core 2 before being corrected are disordered, and the magnetic domains 2 in the magnetic core 2 tend to be parallel after being corrected by the magnetic field line correction method of the present embodiment.

Further, in an embodiment, in step S1, the correcting element 1 and the magnetic core 2 to be corrected are both in a ring shape, and the correcting element 1 and the magnetic core 2 to be corrected are sleeved on the non-magnetic fixing rod 3. Through the fixed stick 3 of no magnetism, can be fixed with correcting 1 and treating to correct magnetic core 2, fixed effectual, convenient operation is convenient for place heating in heating furnace 5.

Further, in an embodiment, the correcting element 1 and the magnetic core 2 to be corrected have circular ring shapes, and the fixing rod 3 is a round rod.

Further, in one embodiment, the thickness of the correction member 1 is 20mm to 30 mm.

Further, in an embodiment, the thickness of the correcting element 1 is 20mm, and when the thickness of the correcting element 1 is 20mm, the correcting effect is the best, the material utilization rate of the correcting element 1 is the highest, the cost performance is the best, and the economy is the best.

Further, in one embodiment, in step S2, the first predetermined temperature is 450 ℃ to 570 ℃.

Further, in one embodiment, in step S3, a rated dc current is applied to the spiral coil 41, and the spiral coil 41 generates magnetic lines of force 4 in the stacking direction to sequentially pass through the correction member 1 and the magnetic core 2. The spiral coil 41 is sleeved outside the heating furnace 5, and after the direct current is applied to the spiral coil 41, the spiral coil 41 generates a magnetic field. The magnetic field lines 4 of the magnetic field cross the hollow of the helical coil 41 in a closed arc. The alignment of the magnetic domains 21 of the magnetic core 2 is achieved by setting the strength value of the transverse magnetic field. Wherein, the working principle of the spiral coil 41 is as follows: the dc current flows from spiral coil 41, through spiral coil 41, and through the negative pole of spiral coil 41, and according to the right hand ampere rule, spiral coil 41 generates a magnetic field from the south pole to the north pole. Fig. 3 shows a schematic diagram of the magnetic field lines 4 generated by the spiral coil 41 after the direct current is applied to the wire of the spiral coil 41 to correct the magnetic core 2.

Further, in an embodiment, in step S4, the second preset temperature is lower than 350 ℃.

Further, in an embodiment, the correcting element 1 is made of DT4 pure iron, and the correcting element 1 made of DT4 pure iron is the cheapest and has a good correcting effect.

Further, in an embodiment, the number of the correcting elements 1 is two, the number of the cores 2 to be corrected is at least two, and each core 2 to be corrected is located between two correcting elements 1, and in a specific correcting process, only two correcting elements 1 are needed, and if more than two correcting elements 1 are arranged, the cores 2 to be corrected can be corrected, but unnecessary waste is also caused.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.