CN116417216A - Magnetic field direction correction device and method passing through different interfaces - Google Patents
Magnetic field direction correction device and method passing through different interfaces Download PDFInfo
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- CN116417216A CN116417216A CN202111669417.3A CN202111669417A CN116417216A CN 116417216 A CN116417216 A CN 116417216A CN 202111669417 A CN202111669417 A CN 202111669417A CN 116417216 A CN116417216 A CN 116417216A
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- 239000000463 material Substances 0.000 claims abstract description 54
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/003—Methods and devices for magnetising permanent magnets
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Abstract
The invention discloses a magnetic field direction correction device and a magnetic field direction correction method which pass through different interfaces, wherein the magnetic circuit with a composite structure is formed in a magnet to be magnetized through a correction iron core and a non-magnetic material component; the state of the magnetic circuit formed in the magnet to be magnetized is adjusted by adjusting the size of the corrective iron core and/or the nonmagnetic material assembly. The magnetic field direction correction scheme provided by the invention corrects the direction of the magnetizing field by constructing the magnetic circuit structure with adjustable states, and realizes that the magnetic field distribution is effectively guided by multi-interface combination, so that the optimal magnetizing and magnetizing field is obtained.
Description
Technical Field
The invention relates to a magnet technology, in particular to a magnetizing technology of a magnet.
Background
The injection permanent magnet material has the advantages of complex shape of a sample, good elasticity, high dimensional accuracy, flexible magnetic field design and the like, is widely applied to new generation products such as stepping motors, vehicle-mounted instruments and meters, various vehicle-mounted motor sensors and the like in recent years, and becomes one of the emerging main beating materials of electronic products and vehicle-mounted parts in the technical field of digital information; injection molded permanent magnet materials are generally classified into two major categories, isotropic and anisotropic.
In motor design, some occasions with high rotating speed require the motor to run stably, and the rotating pulse moment is small and the noise is low. This requires that the magnets form a sinusoidal distribution of the magnetic field within the motor air gap, with the direction of the magnetic field provided by the magnets being dependent on its size, pole width and direction of the magnetic field when magnetized. The size and width of the magnetic poles are generally limited by motor design requirements and cannot be changed, so it becomes important to adjust the direction of the magnetic field when the magnet is magnetized.
In sensor applications, the magnetic field signal generated by the rotation of the magnet is required to change in a functional relationship with the mechanical angle of rotation of the magnet, so that the computer can accurately sense the angle rotated by the object to be measured and then make feedback according to the angle data. Therefore, the accuracy of the magnetic field signal is particularly critical, and at present, most of the high-accuracy sensor magnets adopt a sine wave magnetic field to transmit the signal, so how to generate the sine wave magnetic field by the magnets becomes a key for determining the accuracy of the sensor.
At present, the sensor magnet is mostly designed by adopting a solid disc, the solid magnet can form a sine wave magnetic field at the periphery of the magnet after being magnetized in a parallel field, but the requirement of the sensor on the magnetic field strength is not high, so that the solid magnet has the phenomenon of waste of inner ring materials, and if the inner ring is hollowed, the solid magnet is changed into a hollow ring, so that the manufacturing cost of the magnet is greatly reduced. However, when the magnet with the hollow ring structure is magnetized in a parallel field, the direction of the magnetic field is influenced, however, the existing magnetizing scheme cannot effectively correct the direction of the magnetizing field, and then the magnetizing precision of the magnetic ring with the hollow structure is influenced.
Disclosure of Invention
Aiming at the problem that the existing magnet magnetizing scheme can not effectively adjust the direction of a magnetizing field according to the requirement, the invention aims to provide a magnetic field direction correction scheme penetrating through different interfaces.
In order to achieve the above purpose, the invention provides a magnetic field direction correction device passing through different interfaces, which comprises a correction iron core and a non-magnetic material assembly, wherein the correction iron core is concentrically arranged in a magnet to be magnetized, the non-magnetic material assembly is distributed between the correction iron core and the magnet to be magnetized, and the sizes of the correction iron core and the non-magnetic material assembly are respectively adjustable so as to form a magnetizing magnetic circuit with adjustable state in the magnet to be magnetized.
Further, the magnetizing magnetic circuit is formed by combining multiple layers of different magnetic permeability to form the composite equivalent magnetic permeability.
Further, the cross section of the correction iron core is in a solid round structure.
Further, the section of the nonmagnetic material component is in a hollow circular ring structure.
Furthermore, the inner diameter of the nonmagnetic material component and the outer diameter of the correction iron core are synchronously adjusted under the condition that the inner diameter size of the magnet to be magnetized is unchanged, and the inner diameter space of the magnet to be magnetized is filled with the nonmagnetic material component and the correction iron core.
In order to achieve the above purpose, the present invention provides a method for correcting the direction of a magnetic field passing through different interfaces, wherein a magnetizing magnetic circuit with a composite structure is formed in a magnet to be magnetized by a correction iron core and a non-magnetic material component;
the state of a magnetizing magnetic circuit formed in a magnet to be magnetized is adjusted by adjusting the size of the correction iron core and/or the nonmagnetic material component.
Furthermore, in the correction method, the correction iron core is concentrically arranged in the magnet to be magnetized, and simultaneously, the nonmagnetic material components are distributed between the correction iron core and the magnet to be magnetized.
Furthermore, the modified iron core adopts a structure with a cross section of a solid circle.
Furthermore, the non-magnetic material component adopts a hollow circular ring structure with a section.
Furthermore, the inner diameter of the nonmagnetic material component and the outer diameter of the correction iron core are synchronously adjusted under the condition that the inner diameter size of the magnet to be magnetized is unchanged, and the inner diameter space of the magnet to be magnetized is filled with the nonmagnetic material component and the correction iron core.
The magnetic field direction correction scheme provided by the invention corrects the direction of the magnetizing field by constructing the magnetic circuit structure with adjustable states, and realizes that the magnetic field distribution is effectively guided by multi-interface combination, so that the optimal magnetizing and magnetizing field is obtained. In the scheme, the combination of the three interfaces of the correction iron core, the nonmagnetic material and the permanent magnet magnetic ring is specifically adopted, and the equal peripheral magnetic field distribution of the wafer magnet is realized based on the combination superposition of the three interfaces.
Still further, the magnetic circuit structure formed in the scheme provided by the invention is that the correction iron core, the non-magnetic material and the permanent magnet magnetic ring form a composite magnetic circuit in a parallel magnetic field; the state of the magnetizing magnetic circuit formed in the magnet to be magnetized is adjusted by adjusting the sizes of the correction iron core and the nonmagnetic material in the magnetizing magnetic circuit or adjusting the material of the nonmagnetic material component, namely, the equivalent magnetic conductivity of the magnetic circuit is changed; the method for guiding the distribution of the magnetizing magnetic field through the multi-interface combination design is realized, so that the optimal magnetizing magnetic field is realized.
Drawings
The invention is further described below with reference to the drawings and the detailed description.
FIG. 1 is a diagram showing an exemplary structure of a magnetic field direction correcting apparatus according to the present invention passing through different interfaces;
FIG. 2 is a side view of a magnetizing apparatus in an example of the invention;
FIG. 3 is a top view of a magnetizing apparatus in an example of the invention;
FIG. 4 is a diagram of a secondary magnetic example of the magnetic circuit 1 in an example of the invention;
FIG. 5 is a diagram of a secondary magnetic example of magnetic circuit 2 in an example of the invention;
FIG. 6 is a diagram of a secondary magnetic example of the magnetic circuit 3 in an example of the invention;
FIG. 7 is a waveform of the outer magnetic field of the permanent magnet after magnetizing three magnetic circuits in the example of the present invention;
FIG. 8 is a diagram showing an example of the Fourier transform structure of a magnetic circuit 1 in an example of the present invention;
FIG. 9 is a diagram showing an example of the Fourier transform structure of the magnetic circuit 2 in the example of the present invention;
fig. 10 is a diagram showing an example of the fourier transform structure of the magnetic circuit 3 in the example of the invention.
Detailed Description
The invention is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the invention easy to understand.
The application occasion of the magnet determines the magnetizing mode of the magnet, and in order to meet the application requirement to the maximum extent, the optimal magnetizing mode needs to be customized according to the use requirement; furthermore, the magnetizing mode is mainly determined by the magnetizing magnetic circuit.
The scheme of the invention innovatively constructs the magnetizing magnetic circuit with the composite structure to correct the direction of the magnetizing field.
The scheme of the invention is based on the composite structure magnetizing magnetic circuit, and the state of the magnetizing magnetic circuit is adjusted by adjusting the change of the material, the structure and the interface of the magnetic circuit element forming the composite structure magnetizing magnetic circuit, so as to correct the direction of the magnetizing field.
Referring to fig. 1, an exemplary diagram of a magnetic field direction correction device across different interfaces is shown in accordance with aspects of the present invention.
As can be seen from the figure, the magnetic field direction correction device 20 mainly comprises a correction iron core 21 and a nonmagnetic material component 22.
Wherein, the correction iron core 21 is concentrically arranged in the magnet 23 to be magnetized, and the nonmagnetic material components 22 are distributed between the correction iron core 21 and the magnet 10 to be magnetized, and the two components are matched in the magnet 10 to be magnetized to form a magnetizing magnetic circuit with a composite structure.
Here, the nonmagnetic material assembly 22 fills up the gap between the correction iron core 21 and the magnet 10 to be magnetized, i.e., the outer diameter of the nonmagnetic material assembly 22 matches the inner diameter of the permanent magnet 10, and the inner diameter of the nonmagnetic material assembly 22 matches the outer diameter of the correction iron core 21.
In the composite structure magnetizing magnetic circuit formed by the method, the corresponding magnetic permeability is equivalent magnetic permeability formed by matching the magnetic permeability of the correction iron core 21 and the magnetic permeability of the nonmagnetic material component 22. The magnetic permeability coefficient of the nonmagnetic material component 22 adopted in the scheme is smaller than that of the correction iron core 21, and the nonmagnetic material component 22 with small magnetic permeability coefficient is creatively covered on the outer side of the correction iron core 21 with large magnetic permeability coefficient, so that the formed magnetizing magnetic circuit forms equivalent magnetic permeability with small outer magnetic permeability coefficient and large inner magnetic permeability coefficient. When the magnetizing magnetic circuit with the composite structure is placed in a corresponding magnetizing magnetic field, based on the characteristics of small outer magnetic permeability coefficient and large inner magnetic permeability coefficient, an interface effect can be generated when the corresponding magnetic field passes through the magnetizing magnetic circuit, so that the original direction of the magnetic field is effectively changed.
On the basis, the scheme can change the direction of the magnetizing magnetic field by adjusting the equivalent magnetic permeability of the magnetizing magnetic circuit with the formed composite structure, namely, the magnetizing magnetic field direction is corrected, so that the magnetic field distribution matched with the working condition is obtained.
Specifically, the magnetic field direction is corrected by further changing the magnetic circuit state, that is, changing the equivalent permeability of the magnetic circuit, by adjusting the dimensions of the correction iron core 21 and/or the nonmagnetic material component 22 and/or adjusting the material of the nonmagnetic material component.
In some embodiments of the present invention, the modified iron core 21 is preferably a solid disc, and the corresponding size may be determined according to practical requirements. As an example, the corrected core size Φ12.3l5 may be used.
The modified iron core 21 thus constructed may be inlaid into the nonmagnetic material component 22 using adhesive.
Alternatively, the modified iron core 21 may also be formed by adopting a motor rotating shaft or other assembled metal-like shafts, and the modified iron core may be specifically determined according to actual requirements.
In some embodiments of the present invention, the nonmagnetic material component 22 is preferably a hollow ring structure, and is internally connected to the correction iron core 21, and cooperates with the correction iron core 21 to form multiple interfaces for correcting the direction of the magnetization field.
The corresponding dimensions for the nonmagnetic material component 22 may be based on practical requirements. As an example, the non-magnetic material element 22 may be sized Φ18×Φ12.3×l5.
For the particular construction of the non-magnetic material assembly 22, depending on the magnetic circuit design requirements, a plastic ring or other non-magnetically conductive mounting member may be used, for example.
As a specific example, the nonmagnetic material component 22 may be formed by an air layer, which is directly a void, according to the design requirement of the magnetic circuit.
In some embodiments of the present disclosure, when the size of the modified iron core 21 and/or the nonmagnetic material component 22 is adjusted, the outer diameter size of the nonmagnetic material component 22 is kept unchanged, the inner diameter size of the nonmagnetic material component 22 is adjusted, the outer diameter size of the modified iron core 21 is synchronously adjusted, the distance between the outer circle of the modified iron core and the inner circle of the ring magnet (i.e. the magnet 10 to be magnetized) is adjusted, and then the corresponding relation between the distance change and the magnetic distribution of the outer circumference of the ring magnet (i.e. the magnet 10 to be magnetized) is further found out, when the sine degree is optimal (i.e. when the harmonic ratio is the lowest), the corresponding sizes of the modified iron core 21 and the nonmagnetic material component 22 are the optimal magnetic circuit.
The magnetic field direction correction device is formed by forming a magnetizing magnetic circuit of a composite structure in a magnet to be magnetized through a correction iron core and a non-magnetic material component; on the basis, the state of the magnetizing magnetic circuit formed in the magnet to be magnetized is adjusted by adjusting the size of the correction iron core and/or the size of the nonmagnetic material component in the magnetizing magnetic circuit and/or adjusting the material of the nonmagnetic material component, namely, the equivalent magnetic conductivity of the magnetic circuit is changed; the distribution of the induced magnetizing magnetic field is realized through the multi-interface combination design, so that the optimal magnetizing magnetic field is obtained.
According to the magnetic field direction correction scheme formed by the scheme, the permanent magnet, the correction iron core and the non-magnetic material component are placed in a parallel field to be magnetized, and the magnetic circuit state is changed by adjusting the sizes of corresponding magnetic circuit elements, so that the magnetic field direction is corrected. In specific application, the accurate magnetic field direction can be realized based on the relation between the sizes of the three interfaces of the nonmagnetic material component, the permanent magnet and the correction iron core and the Fourier transformation of the permanent magnet Zhou Cichang, so that the optimal magnetizing and magnetizing field can be obtained.
The magnetic field direction correction scheme formed by the scheme of the invention and passing through different interfaces is applicable to a permanent magnet with a hollow circular ring structure, the geometric characteristic of a correction iron core is that the section of the correction iron core is in a solid circular ring structure, the geometric dimension characteristic of a non-magnetic material component is in a hollow circular ring structure, wherein the correction iron core is embedded in the inner diameter of the non-magnetic material component, and the component assembled by the correction iron core and the permanent magnet is embedded in the permanent magnet circular ring.
The magnetic field direction correction scheme through different interfaces according to the present invention is further described below by corresponding comparative examples.
This embodiment will be described by taking a conventional 2-pole magnetic ring magnetizing method as an example.
The high-speed motor and the high-precision sensor adopt a 2-pole magnetizing mode of a magnetic ring, namely a single magnet is directly placed in a parallel magnetic field for magnetization, and the outer periphery of a magnetized product is magnetized, and the magnetic characteristic of the magnetized product is that the outer periphery is 2-pole magnetized. Under the conventional magnetizing mode, the magnetic distribution of the outer periphery of the magnet cannot meet the requirement of sine waves, so that the efficiency of the motor is low, the accuracy of the sensor is poor, and the use requirement of a product cannot be met.
The scheme provided by the invention is adopted to effectively correct the magnetic field distribution waveform generated by the magnet under the condition that the shape of the product and the number of magnetizing poles are determined so as to obtain the optimal magnetizing and magnetizing field.
On the basis, according to the scheme provided by the invention, different magnetic circuit structures are also arranged to form a control test.
Before a specific experiment, the present example first constructs a corresponding magnetizing apparatus.
Referring to fig. 2 and 3, there is shown an example of the configuration of a magnetizing apparatus according to the present example.
The magnetizing equipment mainly comprises an upper cover 1, a support column 2, a bushing 3, an external electromagnetic wire 4, a wiring terminal 5, a bottom plate 6, a pad 7, a cushion block 8 and a winding electromagnetic wire 9.
The corresponding assembly structure is as follows:
the lower end of the bottom plate 6 is provided with 4 pad feet 7, and the bottom plate 6 is connected with the pad feet 7 by threads;
4 support columns 2 are arranged at the upper end of the bottom plate 6, and the bottom plate 6 is connected with the support columns 2 through threads;
an upper cover 1 is arranged at the upper end of the support column 2, and the support column 2 is connected with the upper cover 1 by screw threads;
the lining 3 is arranged between the upper cover 1 and the bottom plate 6, and the lining 3 is bonded with the upper cover 1 and the bottom plate 6 by glue;
the outer ring of the bushing 3 is wound with a winding electromagnetic wire 9, and the outer ring of the winding electromagnetic wire 9 is solidified by banana oil;
two connectors are led out of the winding electromagnetic wire 9 and are welded with 2 electromagnetic wires 4;
the wiring terminal 5 is arranged on the bottom plate 6, and the wiring terminal 5 is connected with the bottom plate 6 through threads;
2 electromagnetic wires 4 are fixed on the positive electrode and the negative electrode of the wiring terminal 5 and are locked by threads
A spacer 8 is mounted in the center of the bushing 3 for positioning the magnetic circuit portion.
After the magnetizing equipment is built, the corresponding magnetizing magnetic circuit is built based on the scheme, and meanwhile, two contrast magnetizing magnetic circuits are also built.
The structure and parameters of the three-way magnetizing magnetic circuit constructed here are shown in table 1:
table 1 magnetic circuit parameters
Wherein, the magnetic circuit 1 is a magnetizing mode (as shown in fig. 4) of adopting a composite magnetizing magnetic circuit formed by lining a correction iron core 21 and air 22 (namely a non-magnetic material component) in the permanent magnet 10 based on the scheme;
the magnetic circuit 2 is a conventional magnetizing method directly adopting the permanent magnet 10 (as shown in fig. 5);
the magnetic circuit 3 is a magnetizing method (as shown in fig. 6) in which a single magnetizing magnetic circuit is formed by using only the lining correction iron core 30 in the permanent magnet 10;
during specific experiments, aiming at the built magnetizing equipment, an external magnetizing power supply of the air coil can form a pulse parallel magnetic field with the magnetic field strength of 30000Oe at the center of the bushing at the moment of power supply discharge
Then, the constructed magnetic circuits 1, 2 and 3 are respectively placed above the cushion blocks 6 of the magnetizing equipment, namely, the 3 magnetic circuits are respectively placed in pulse parallel fields for magnetizing, and the surface magnetic distribution of the magnetic rings is tested after magnetizing (see fig. 4-6 respectively).
For the above groups of magnets, magnetizing in a parallel magnetic field of 30000Oe, after magnetizing, the example further measures the magnetic distribution of the outer periphery of the product, the measuring position is at the center of the height direction of the product, the measuring air gap is 0.5mm, and the actual magnetic field waveform distribution state of the product after magnetizing in the parallel field is compared with the actual magnetic field waveform distribution state of the product in several interface states.
As shown in fig. 7, the magnetic distribution of the magnet of the magnetic circuit 1 is in a sine-like state, the magnetic distribution of the magnet of the magnetic circuit 2 is in a triangular wave state, and the magnetic distribution of the magnet of the magnetic circuit 3 is in a square wave state.
To quantify the sine degree differences of the three magnetizing products, this example further expands the fourier transform of the magnetic field waveform.
In this example, fourier transform expansion was performed on magnetic waveforms of the magnet table magnetized in three different magnetic circuit states, and the results are shown in table 2 and fig. 8 to 10 below:
TABLE 2 harmonic duty cycle
By analyzing the harmonic duty ratios in the three magnetic circuit states, it was found that the sine degree of the magnetic circuit 1 was the best, and the sine degrees of the magnetic circuit 2 and the magnetic circuit 3 were both inferior.
The comparison of the magnetic circuit structure and the Fourier transform analysis of the magnetic waveform of the magnet table are combined, and the determination can be carried out:
(1) When the magnet is magnetized, the distribution state of the magnetic field can be changed through the combination of different interfaces;
(2) In the state of the magnetic circuit 1, when the magnetic ring is magnetized, the inner lining iron core of the magnetic ring is filled with air, and the obtained waveform is also between the triangular wave of the magnetic circuit 2 and the square wave of the magnetic circuit 3, namely, the surface magnetic distribution waveform after the magnetization of the magnet can be changed by adjusting the size of the inner lining iron core of the magnetic circuit 1. When the size of the lining iron core is zero, the limit state of the air lining is equal to the magnetic circuit 2; when the size of the lining core is 18mm, it is a limit state of the core lining, which corresponds to the magnetic circuit 3. Therefore, by adjusting the size of the lining iron core in the magnetic circuit 1, the magnet can obtain the surface magnetic distribution waveform in any state between the triangular wave of the magnetic circuit 2 and the square wave of the magnetic circuit 3 after magnetization.
From the above examples, it is clear that the magnetizing field has different conductivity, i.e. permeability, in different media. The magnetic permeability is the resistance to magnetic flux generated by a current flowing through a coil in a space or a space of a core or the ability to conduct magnetic lines of force in a magnetic field.
The permeability parameters of the materials selected in this example are shown in table 3 below:
TABLE 3 magnetic permeability parameters for different materials
As can be seen from the above table data, the magnetic permeability of the modified core is much greater than that of the permanent magnet, the nonmagnetic material, and air. The higher the permeability value, the stronger the ability to conduct magnetic lines, which will preferentially pass through the magnetically conductive material. When a composite magnetic path is composed of materials with different magnetic conductivities, magnetic force lines tend to converge towards materials with high magnetic conductivities, so that the direction of the magnetic force lines is changed:
1. comparing the magnetic circuit 2 with the magnetic circuit 3, only changing the magnetic permeability of the material in the permanent magnet, after magnetizing, obtaining two different surface magnetic distributions in the permanent magnet, wherein the magnetic circuit 2 is a triangular wave, and the magnetic circuit 3 is a square wave. During the surface magnetic measurement, a Hall probe is used for measuring the magnetic flux density of the outer diameter of the permanent magnet along the radial direction, and the measuring path is rotated for 360 degrees close to the surface of the product. Therefore, the difference between the triangular wave and the square wave is that the included angles of the magnetic force lines in the triangular wave shape and the radial direction of the permanent magnet are different, the included angle between the magnetic force lines in the triangular wave shape and the radial direction of the permanent magnet is larger, namely the magnetic force lines in the square wave shape and the radial direction of the permanent magnet are in a divergent trend, and the included angle between the magnetic force lines in the square wave shape and the radial direction of the permanent magnet is smaller, namely the magnetic force lines in the square wave shape and the radial direction of the permanent magnet are in a convergent trend.
2. Comparing the magnetic circuit 1 with the magnetic circuit 2 and the magnetic circuit 3, wherein the material of the inner periphery of the permanent magnet of the magnetic circuit 1 is a composite composition of two materials with different magnetic conductivities, after magnetizing, the surface magnetic waveform of the outer periphery of the permanent magnet is also between a triangular wave and a square wave, namely the composite composition of the two materials with different magnetic conductivities is equivalent to obtaining a material between a non-magnetic material (the magnetic conductivity is 1) and a modified iron core material (the magnetic conductivity is 1 multiplied by 10 and is not less than 3), and the equivalent magnetic conductivity of the composite composition is changed along with the dimensional change of the materials with different structures. When the equivalent magnetic permeability is different, the degree of convergence or divergence of the magnetic force lines is changed, namely the direction of the magnetic field can be changed by changing the equivalent magnetic permeability, so that the magnetic field distribution matched with the working condition is obtained.
Based on the scheme provided by the invention, the required magnetic field distribution can be obtained through different interface combination schemes, and the scheme can be used for magnetizing the 2-pole magnetic ring in a parallel field and also can be applied to the design of the iron core pole head for magnetizing the multi-pole magnetic ring.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The magnetic field direction correction device is characterized by comprising a correction iron core and a non-magnetic material component, wherein the correction iron core is concentrically arranged in a magnet to be magnetized, the non-magnetic material component is distributed between the correction iron core and the magnet to be magnetized, and the sizes of the correction iron core and the non-magnetic material component are respectively adjustable so as to form a magnetic circuit with an adjustable state in the magnet to be magnetized.
2. The magnetic field direction modifying apparatus passing through different interfaces of claim 1, wherein the modified core has a cross-section of a solid circular structure.
3. The magnetic field direction modifying apparatus of claim 1, wherein the non-magnetic material assembly has a hollow circular configuration in cross section.
4. The device according to claim 1, wherein the non-magnetic material assembly and the correction core are arranged to synchronously adjust the inner diameter of the non-magnetic material assembly and the outer diameter of the correction core and to fill the space of the inner diameter of the magnet to be magnetized, while the inner diameter of the magnet to be magnetized is unchanged.
5. The magnetic field direction modifying apparatus across different interfaces of claim 1, wherein the magnetizing circuits are formed with a combination of multiple layers of different permeability to form a composite equivalent permeability.
6. A method for correcting the direction of magnetic field passing through different interfaces is characterized in that,
forming a magnetic circuit of a composite structure in the magnet to be magnetized through the correction iron core and the non-magnetic material component;
the state of the magnetic circuit formed in the magnet to be magnetized is adjusted by adjusting the size of the corrective iron core and/or the nonmagnetic material assembly.
7. The method according to claim 6, wherein the correction iron core is concentrically arranged in the magnet to be magnetized, and the nonmagnetic material component is distributed between the correction iron core and the magnet to be magnetized.
8. The method for correcting the direction of a magnetic field passing through different interfaces according to claim 6, wherein the correction iron core has a cross section with a solid round structure.
9. The method of claim 6, wherein the non-magnetic material assembly has a hollow circular cross-section.
10. The method according to claim 6, wherein the inner diameter of the nonmagnetic material assembly and the outer diameter of the correction iron core are adjusted synchronously and the space of the inner diameter of the magnet to be magnetized is filled up under the condition that the inner diameter of the magnet to be magnetized is unchanged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111669417.3A CN116417216A (en) | 2021-12-31 | 2021-12-31 | Magnetic field direction correction device and method passing through different interfaces |
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| CN202111669417.3A CN116417216A (en) | 2021-12-31 | 2021-12-31 | Magnetic field direction correction device and method passing through different interfaces |
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