Method, device and processor for determining magnetic property information of nanocrystalline strip

Abstract

The application discloses a method, device and processor for determining magnetic property information of nanocrystalline strip. The method comprises the following steps: obtaining non-sinusoidal excitation data of the nanocrystalline strip; decomposing the non-sinusoidal excitation data into a plurality of sinusoidal harmonic data; determining a plurality of equivalent magnetic path lengths based on the plurality of sinusoidal harmonic data; and determining the magnetic property information of the nanocrystalline strip based on the plurality of equivalent magnetic path lengths, wherein the magnetic property information at least comprises magnetic property information and / or magnetostriction property information. The application solves the technical problem that the magnetic property of the nanocrystalline strip cannot be determined.

Description

Technical Field

[0001] This invention relates to the field of materials science and technology, and more specifically, to a method, apparatus, and processor for determining the magnetic properties of nanocrystalline ribbons. Background Technology

[0002] Currently, high-frequency transformers, as key components in power electronic transformers, are widely used in medium- and high-voltage smart distribution networks integrating new energy sources. However, large-capacity high-frequency transformers often operate under non-sinusoidal excitation, resulting in vibrations containing numerous high-order harmonic components and generating harsh high-frequency noise. This noise has serious negative impacts on the surrounding environment and residents' health. Prolonged vibration can also affect the reliability of the transformer itself, threatening the safe and stable operation of the power system. Analysis shows that the magnetostriction of nanocrystalline ribbons is the main source of vibration and noise in the core of medium- and high-frequency transformers. Therefore, studying the magnetostrictive properties of nanocrystalline ribbons at different temperatures is of great significance for reducing the vibration and noise of medium- and high-frequency transformers.

[0003] In related technologies, the ring sample measurement method can only measure the magnetic properties of standard-sized toroidal cores. However, nanocrystalline cores come in various shapes and sizes, making the ring sample measurement method difficult to accurately reflect the magnetic properties of cores of different sizes. The single-piece measurement method can only measure magnetic properties under sinusoidal excitation at several hundred Hz, which does not reflect the actual operating conditions of nanocrystalline cores. When measuring the magnetic properties and magnetostriction of multiple nanocrystalline ribbons by bonding them together, the different thicknesses of the bonding significantly affect the measurement results. Furthermore, when using optical sensors to measure magnetostriction, a reflector is required, and the added mass of the reflector also significantly affects the measurement results. Additionally, medium- and high-frequency transformers often operate under non-sinusoidal excitation, and current measurement methods mainly focus on sinusoidal excitation, which does not reflect the actual operating conditions of nanocrystalline ribbons. Therefore, there is a lack of methods to accurately measure the magnetic properties and magnetostriction of nanocrystalline ribbons under non-sinusoidal excitation, thus failing to obtain the magnetic properties and magnetostriction characteristics of nanocrystalline ribbons under non-sinusoidal excitation. Consequently, there is a technical problem of being unable to determine the magnetic properties of nanocrystalline ribbons.

[0004] There is currently no effective solution to the technical problem of being unable to determine the magnetic properties of nanocrystalline ribbons. Summary of the Invention

[0005] This invention provides a method, apparatus, and processor for determining the magnetic properties of nanocrystalline ribbons, thereby at least solving the technical problem of being unable to determine the magnetic properties of nanocrystalline ribbons.

[0006] According to one aspect of the present invention, a method for determining magnetic property information of a nanocrystalline ribbon is provided. The method may include: acquiring non-sinusoidal excitation data for the nanocrystalline ribbon; decomposing the non-sinusoidal excitation data into multiple sinusoidal harmonic data; determining multiple equivalent magnetic circuit lengths based on the multiple sinusoidal harmonic data; and determining magnetic property information of the nanocrystalline ribbon based on the multiple equivalent magnetic circuit lengths, wherein the magnetic property information includes at least magnetic property information and / or magnetostrictive property information.

[0007] Optionally, based on multiple sinusoidal harmonic data, multiple equivalent magnetic circuit lengths are determined, including: obtaining the number of nanocrystalline ribbon stacks, wherein the number of stacks is used to indicate the number of nanocrystalline ribbons stacked together; and determining multiple equivalent magnetic circuit lengths based on the number of stacks and multiple sinusoidal harmonic data.

[0008] Optionally, based on the number of laminations and multiple sinusoidal harmonic data, multiple equivalent magnetic circuit lengths are determined, including: determining the magnetic circuit length and magnetic flux density peak value corresponding to multiple sinusoidal harmonic data; inputting the magnetic circuit length, magnetic flux density peak value and lamination number into the equivalent magnetic circuit length model for analysis to obtain multiple equivalent magnetic circuit lengths, wherein the equivalent magnetic circuit length model is a pre-set model for calculating the equivalent magnetic circuit length.

[0009] Optionally, the magnetic property information of the nanocrystalline ribbon is determined based on multiple equivalent magnetic circuit lengths, including: acquiring coil data of the nanocrystalline ribbon, wherein the coil data is used to indicate data related to the coil of the nanocrystalline ribbon; and inputting the coil data and equivalent magnetic circuit length into a magnetic property model for analysis to obtain magnetic property information.

[0010] Optionally, the magnetic properties of the nanocrystalline ribbon are determined based on multiple equivalent magnetic circuit lengths, including: acquiring sample data of the nanocrystalline ribbon, wherein the sample data is used to indicate data related to the sample; and inputting the sample data and equivalent magnetic circuit lengths into a magnetostrictive property model for analysis to obtain magnetostrictive property information.

[0011] Optionally, the method for determining the magnetic properties of nanocrystalline ribbons may further include visualizing the magnetic properties.

[0012] According to another aspect of the present invention, an apparatus for determining magnetic property information of a nanocrystalline ribbon is also provided. The apparatus may include: an acquisition unit for acquiring non-sinusoidal excitation data for the nanocrystalline ribbon; a decomposition unit for decomposing the non-sinusoidal excitation data into multiple sinusoidal harmonic data; a first determination unit for determining multiple equivalent magnetic circuit lengths based on the multiple sinusoidal harmonic data; and a second determination unit for determining magnetic property information of the nanocrystalline ribbon based on the multiple equivalent magnetic circuit lengths, wherein the magnetic property information includes at least magnetic property information and / or magnetostrictive property information.

[0013] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein, when the program is run by a processor, it controls the device where the storage medium is located to execute the method for determining the magnetic properties information of nanocrystalline ribbons according to the embodiments of the present invention.

[0014] According to another aspect of the present invention, a processor is also provided. The processor is used to run a program, wherein the program, when running, executes the method for determining the magnetic properties information of the nanocrystalline ribbon according to the embodiments of the present invention.

[0015] According to another aspect of the present invention, a computer program product is also provided. The program product includes computer instructions that, when executed by a processor, implement the method for determining the magnetic properties information of the nanocrystalline ribbon according to the embodiments of the present invention.

[0016] In this embodiment of the invention, non-sinusoidal excitation data for a nanocrystalline ribbon is acquired; the non-sinusoidal excitation data is decomposed into multiple sinusoidal harmonic data; based on the multiple sinusoidal harmonic data, multiple equivalent magnetic circuit lengths are determined; based on the multiple equivalent magnetic circuit lengths, the magnetic characteristic information of the nanocrystalline ribbon is determined, wherein the magnetic characteristic information includes at least magnetic characteristic information and / or magnetostrictive characteristic information. In other words, this embodiment of the invention determines the equivalent magnetic circuit length by processing the non-sinusoidal excitation data of the nanocrystalline ribbon, thereby determining the magnetic characteristic information of the nanocrystalline ribbon. This solves the technical problem of being unable to determine the magnetic characteristics of the nanocrystalline ribbon and achieves the technical effect of determining the magnetic characteristics of the nanocrystalline ribbon. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a flowchart of a method for determining the magnetic properties of a nanocrystalline ribbon according to an embodiment of the present invention;

[0019] Figure 2 This is a flowchart of a method for measuring the magnetic properties and magnetostriction of a nanocrystalline ribbon according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of a magnetic property and magnetostriction measurement platform according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of a device for determining the magnetic properties of a nanocrystalline ribbon according to an embodiment of the present invention. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, functional component, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, functional components, or devices.

[0024] According to an embodiment of the present invention, an embodiment of a method for determining magnetic property information of nanocrystalline ribbon is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0025] Figure 1 This is a flowchart of a method for determining the magnetic properties of a nanocrystalline ribbon according to an embodiment of the present invention, such as... Figure 1 As shown, the method may include the following steps:

[0026] Step S101: Obtain non-sinusoidal excitation data for nanocrystalline ribbons.

[0027] In the technical solution provided by step S101 of the present invention, the non-sinusoidal excitation data can also be referred to as non-sinusoidal excitation.

[0028] In this embodiment, non-sinusoidal excitation data for the nanocrystalline ribbon is acquired. For example, experiments are designed to subject the nanocrystalline ribbon to non-sinusoidal excitation, such as applying pulse loading or other non-periodic loading methods, and the corresponding non-sinusoidal excitation data is acquired through sensors. This is merely an example and does not limit the specific method for acquiring non-sinusoidal excitation data for the nanocrystalline ribbon.

[0029] Step S102: Decompose the non-sinusoidal excitation data into multiple sinusoidal harmonic data.

[0030] In the technical solution provided by step S102 of the present invention, sinusoidal harmonic data can also be referred to as sinusoidal harmonic signal.

[0031] In this embodiment, after obtaining the non-sinusoidal excitation data for the nanocrystalline ribbon in step S101, the non-sinusoidal excitation data is decomposed into multiple sinusoidal harmonic data. For example, Fourier transform can be used to decompose the non-sinusoidal excitation data into multiple sinusoidal harmonic data. This is only an example and does not limit the specific method of decomposing the non-sinusoidal excitation data.

[0032] For example, non-sinusoidal excitation can be decomposed into multiple sinusoidal harmonic signals by Fourier transform. The order of the decomposed harmonics is determined by the harmonic frequency, and the maximum harmonic frequency is less than 20kHz.

[0033] Step S103: Determine multiple equivalent magnetic circuit lengths based on multiple sinusoidal harmonic data.

[0034] In the technical solution provided by step S103 of the present invention, after decomposing the non-sinusoidal excitation data into multiple sinusoidal harmonic data in step S102, multiple equivalent magnetic circuit lengths are determined based on the multiple sinusoidal harmonic data.

[0035] In this embodiment, multiple equivalent magnetic circuit lengths are determined using the equivalent magnetic circuit length formula.

[0036] For example, the formula for the equivalent magnetic circuit length can be expressed using the following formula (1):

[0037] l m_s =l1(n,B 1p )+l2(n,B 2p )+…+l m (n,B mp )+l c (n,B0) (1)

[0038] Among them, l m_s The value of l represents the equivalent magnetic circuit length of the strip being measured. m This represents the magnetic circuit length corresponding to the m-th sinusoidal harmonic (the frequency of the m-th harmonic is less than 20kHz), where n represents the number of strip laminations, and B... mp Let l represent the peak magnetic flux density of the m-th harmonic. c This indicates the magnetic circuit length corresponding to frequencies exceeding 20kHz, where the peak magnetic flux density is the saturation magnetic flux density of the nanocrystalline ribbon.

[0039] Step S104: Determine the magnetic properties of the nanocrystalline ribbon based on multiple equivalent magnetic circuit lengths.

[0040] In the technical solution provided by step S104 of the present invention, the magnetic characteristic information includes at least magnetic characteristic information and / or magnetostrictive characteristic information.

[0041] In this embodiment, after determining multiple equivalent magnetic circuit lengths in step S103, the magnetic characteristic information of the nanocrystalline ribbon is determined based on these lengths. For example, the excitation current i in the excitation coil is obtained. s (t), thereby determining the magnetic properties of the nanocrystalline ribbon based on the excitation current and the equivalent magnetic circuit length. This is merely an example and does not limit the specific method for determining the magnetic properties of the nanocrystalline ribbon.

[0042] For example, measuring the excitation current i in the excitation coil s (t), determine the magnetic field strength H under non-sinusoidal excitation. t_s (t) is shown in the following formula (2):

[0043] N1i s (t)=H t_s (t)l m_s +ΔH s (t)l δ (2)

[0044] Where N1 represents the number of turns in the excitation winding, i s (t) represents the excitation current, l m_s ΔH represents the equivalent magnetic circuit length under non-sinusoidal excitation. s (t) represents the field strength difference between the air gap and the sample under non-sinusoidal excitation, l δ This indicates the air gap length.

[0045] For another example, the laser vibrometer measures the vibration velocity of the sample, and the integration yields the relative displacement ΔL of the strip along the magnetization direction. Considering the influence of the weight of the reflector, the magnetostriction coefficient λ is obtained, as shown in the following formula (3):

[0046]

[0047] Among them, M F M indicates the quality of the reflector. T Indicates the mass of the sample to be tested, l m ΔL represents the equivalent magnetic circuit length, ΔL represents the relative displacement, and L represents the strip length.

[0048] It should be noted that the above embodiments can be performed using a magnetic property and magnetostriction measurement platform.

[0049] In steps S101 to S104 of this invention, non-sinusoidal excitation data for nanocrystalline ribbons is obtained; the non-sinusoidal excitation data is decomposed into multiple sinusoidal harmonic data; multiple equivalent magnetic circuit lengths are determined based on the multiple sinusoidal harmonic data; and the magnetic characteristic information of the nanocrystalline ribbon is determined based on the multiple equivalent magnetic circuit lengths, wherein the magnetic characteristic information includes at least magnetic characteristic information and / or magnetostrictive characteristic information. In other words, this embodiment of the invention determines the equivalent magnetic circuit length by processing the non-sinusoidal excitation data of nanocrystalline ribbons, thereby determining the magnetic characteristic information of the nanocrystalline ribbons. This solves the technical problem of being unable to determine the magnetic characteristics of nanocrystalline ribbons and achieves the technical effect of determining the magnetic characteristics of nanocrystalline ribbons.

[0050] The method described in this embodiment will be further described below.

[0051] As an optional embodiment, determining multiple equivalent magnetic circuit lengths based on multiple sinusoidal harmonic data includes: obtaining the number of nanocrystalline ribbon stacks, wherein the number of stacks indicates the number of nanocrystalline ribbons stacked together; and determining multiple equivalent magnetic circuit lengths based on the number of stacks and multiple sinusoidal harmonic data.

[0052] In this embodiment, the number of nanocrystalline ribbon stacks is obtained. The number of stacks can be represented by n.

[0053] Optionally, multiple equivalent magnetic circuit lengths can be determined based on the number of laminates and multiple sinusoidal harmonic data. The specific method for determining the equivalent magnetic circuit length is as shown in the aforementioned formula (1), and will not be repeated here.

[0054] Optionally, by considering the relationship between the effective magnetic circuit length and the magnetic flux density and the amount of strip material under non-sinusoidal excitation, the effective magnetic circuit length under different amounts of strip material and different magnetic flux densities under non-sinusoidal excitation can be calculated more accurately, thereby accurately calculating the magnetic field strength in the strip material.

[0055] As an optional implementation method, based on the number of laminations and multiple sinusoidal harmonic data, multiple equivalent magnetic circuit lengths are determined, including: determining the magnetic circuit length and magnetic flux density peak value corresponding to multiple sinusoidal harmonic data; inputting the magnetic circuit length, magnetic flux density peak value and lamination number into the equivalent magnetic circuit length model for analysis to obtain multiple equivalent magnetic circuit lengths, wherein the equivalent magnetic circuit length model is a pre-set model for calculating the equivalent magnetic circuit length.

[0056] In this embodiment, the magnetic circuit length and peak magnetic flux density corresponding to multiple sinusoidal harmonic data are determined. The magnetic circuit length can be represented by l. m To represent this, the peak magnetic flux density can be expressed using B. mp To express.

[0057] Optionally, the magnetic circuit length, peak magnetic flux density, and number of laminates can be input into the equivalent magnetic circuit length model for analysis to obtain multiple equivalent magnetic circuit lengths. The equivalent magnetic circuit length model can be expressed as the aforementioned formula (1), which will not be elaborated here.

[0058] Optionally, by inputting the magnetic circuit length and magnetic flux density peak corresponding to multiple sinusoidal harmonic data, the performance of the magnetic circuit can be analyzed more accurately, thus improving the accuracy of the analysis results.

[0059] As an optional embodiment, the magnetic property information of the nanocrystalline ribbon is determined based on multiple equivalent magnetic circuit lengths, including: acquiring coil data of the nanocrystalline ribbon, wherein the coil data is used to indicate data related to the coil of the nanocrystalline ribbon; and inputting the coil data and equivalent magnetic circuit lengths into a magnetic property model for analysis to obtain magnetic property information.

[0060] In this embodiment, coil data of the nanocrystalline ribbon is acquired. The coil data may include, but is not limited to, the number of turns B of the coil, the cross-sectional area A of the sample, and the induced voltage U2(t) of coil B.

[0061] Optionally, the coil data and equivalent magnetic circuit length are input into a magnetic characteristic model for analysis to obtain magnetic characteristic information. This magnetic characteristic information may include the magnetic polarization intensity J. s (t) and magnetic field strength H t_s (t).

[0062] For example, magnetic polarization J s (t) can be calculated using the following formula (4):

[0063]

[0064] Among them, J s (t) represents the magnetic polarization intensity, N2 represents the number of turns of coil B, A represents the cross-sectional area of ​​the sample, and U2(t) represents the induced voltage of coil B.

[0065] As an optional embodiment, the magnetic properties of the nanocrystalline ribbon are determined based on multiple equivalent magnetic circuit lengths, including: acquiring sample data of the nanocrystalline ribbon, wherein the sample data is used to indicate data related to the sample; and inputting the sample data and the equivalent magnetic circuit length into a magnetostrictive property model for analysis to obtain magnetostrictive property information.

[0066] In this embodiment, sample data of the nanocrystalline ribbon is obtained. The sample data may include, but is not limited to, the reflector mass M. F Mass M of the sample to be tested T .

[0067] Optionally, the sample data and equivalent magnetic circuit length are input into the magnetostrictive characteristic model for analysis to obtain magnetostrictive characteristic information. This magnetostrictive characteristic information can also be expressed as magnetostriction λ.

[0068] For example, the laser vibrometer measures the vibration velocity of the sample, and the integration yields the relative displacement ΔL of the strip along the magnetization direction. Considering the influence of the weight of the reflector, the magnetostriction coefficient λ is obtained as shown in the aforementioned formula (3), which will not be elaborated here.

[0069] As an optional embodiment, the method for determining the magnetic properties of nanocrystalline ribbons further includes: visualizing the magnetic properties.

[0070] In this embodiment, the magnetic properties information is visualized. For example, the magnetic properties information is plotted as a curve.

[0071] For example, on the host computer, the hysteresis loop and magnetization curve are plotted based on the magnetic polarization intensity and magnetic field intensity of the strip under non-sinusoidal excitation. The magnetostriction butterfly curve and magnetostriction single-value curve are plotted based on the magnetic polarization intensity and magnetostriction, and the magnetostriction spectrum is displayed.

[0072] It should be noted that the above embodiments can be performed using a magnetic property and magnetostriction measurement platform.

[0073] In this embodiment, non-sinusoidal excitation data for a nanocrystalline ribbon is acquired; the non-sinusoidal excitation data is decomposed into multiple sinusoidal harmonic data; based on the multiple sinusoidal harmonic data, multiple equivalent magnetic circuit lengths are determined; based on the multiple equivalent magnetic circuit lengths, the magnetic characteristic information of the nanocrystalline ribbon is determined, wherein the magnetic characteristic information includes at least magnetic characteristic information and / or magnetostrictive characteristic information. In other words, this embodiment of the invention determines the equivalent magnetic circuit length by processing the non-sinusoidal excitation data of the nanocrystalline ribbon, thereby determining the magnetic characteristic information of the nanocrystalline ribbon. This solves the technical problem of being unable to determine the magnetic characteristics of the nanocrystalline ribbon and achieves the technical effect of determining the magnetic characteristics of the nanocrystalline ribbon.

[0074] The technical solutions of the embodiments of the present invention will be illustrated below with reference to preferred embodiments.

[0075] Currently, high-frequency transformers, as key components in power electronic transformers, are widely used in medium- and high-voltage smart distribution networks integrating new energy sources. However, large-capacity high-frequency transformers often operate under non-sinusoidal excitation, resulting in vibrations containing numerous high-order harmonic components and generating harsh high-frequency noise. This noise has serious negative impacts on the surrounding environment and residents' health. Prolonged vibration can also affect the reliability of the transformer itself, threatening the safe and stable operation of the power system. Analysis shows that the magnetostriction of nanocrystalline ribbons is the main source of vibration and noise in the core of medium- and high-frequency transformers. Therefore, studying the magnetostrictive properties of nanocrystalline ribbons at different temperatures is of great significance for reducing the vibration and noise of medium- and high-frequency transformers.

[0076] In related technologies, the ring sample measurement method can only measure the magnetic properties of standard-sized toroidal cores. However, nanocrystalline cores come in various shapes and sizes, making the ring sample measurement method difficult to accurately reflect the magnetic properties of cores of different sizes. The single-piece measurement method can only measure magnetic properties under sinusoidal excitation at several hundred Hz, which does not reflect the actual operating conditions of nanocrystalline cores. When measuring the magnetic properties and magnetostriction of multiple nanocrystalline ribbons by bonding them together, the different thicknesses of the bonding significantly affect the measurement results. Furthermore, when using optical sensors to measure magnetostriction, a reflector is required, and the added mass of the reflector also significantly affects the measurement results. Additionally, medium- and high-frequency transformers often operate under non-sinusoidal excitation, and current measurement methods mainly focus on sinusoidal excitation, which does not reflect the actual operating conditions of nanocrystalline ribbons. Therefore, there is a lack of methods to accurately measure the magnetic properties and magnetostriction of nanocrystalline ribbons under non-sinusoidal excitation, thus creating a technical problem of being unable to determine the magnetic properties of nanocrystalline ribbons. Currently, no effective solution has been proposed to address this technical problem of being unable to determine the magnetic properties of nanocrystalline ribbons.

[0077] However, this invention proposes a method for measuring the magnetic properties and magnetostriction of nanocrystalline ribbons. By determining the expression for the equivalent magnetic circuit length under sinusoidal excitation, the non-sinusoidal excitation is decomposed into multiple sinusoidal harmonic signals superimposed according to Fourier transform, thereby determining the magnetic polarization, magnetic field strength, and magnetostriction under non-sinusoidal excitation. Then, on a host computer, hysteresis loops and magnetization curves are plotted based on the magnetic polarization and magnetic field strength of the ribbon under non-sinusoidal excitation. Magnetostriction butterfly curves and single-valued magnetostriction curves are plotted based on the magnetic polarization and magnetostriction, and the magnetostriction spectrum is displayed. This solves the technical problem of being unable to determine the magnetic properties of nanocrystalline ribbons and achieves the technical effect of determining the magnetic properties of nanocrystalline ribbons.

[0078] The embodiments of the present invention will be further described below.

[0079] Figure 2This is a flowchart illustrating a method for measuring the magnetic properties and magnetostriction of a nanocrystalline ribbon according to an embodiment of the present invention, as shown below. Figure 2 As shown, the method for measuring magnetic properties and magnetostriction includes the following steps:

[0080] Step S201: Determine the expression for the equivalent magnetic circuit length under sinusoidal excitation.

[0081] In this embodiment, a nanocrystalline alloy strip is placed in a magnetometer, a sinusoidal excitation is applied through an excitation coil, and the induced voltage U on the H coil is measured. H The magnetic field strength H(t) passing through the strip is calculated as shown in the following formula (5):

[0082]

[0083] Where H(t) is the magnetic field strength, μ0 is the permeability in vacuum, and N H A H Let H be the turns area of ​​the H coil.

[0084] Optionally, the excitation current i(t) in the excitation coil is measured, and the equivalent magnetic circuit length l is obtained according to the conservation of magnetomotive force. m As shown in the following formula (6):

[0085] N1i(t)=H t (t)l m +ΔH(t)l δ (6)

[0086] Where N1 is the number of turns in the excitation winding, i(t) is the excitation current, and l m The equivalent magnetic circuit length is given, ΔH is the difference in field strength between the air gap and the sample, and l is the value of l. δ This is the air gap length.

[0087] Optionally, by changing the number of strip laminations, the equivalent magnetic circuit length corresponding to different numbers of strip laminations can be obtained. By changing the amplitude of the excitation voltage, the magnetic flux density of the strip can be changed, and the equivalent magnetic circuit length corresponding to different magnetic flux densities can be obtained. Polynomial fitting is used to obtain the equivalent magnetic circuit length in relation to the number of laminations n and the peak magnetic flux density B. p Relationship l m =f(n,B p ).

[0088] Optionally, sinusoidal excitation refers to a method of using a sinusoidal signal as input excitation in signal processing or system analysis. Sinusoidal excitation is commonly used to test the frequency response characteristics of a system; by inputting sinusoidal signals of different frequencies, the system's response at different frequencies can be obtained. Sinusoidal excitation is also frequently used in applications such as spectrum analysis and filter design in signal processing.

[0089] Step S202: Decompose the non-sinusoidal excitation into multiple superimposed sinusoidal harmonic signals according to the Fourier transform.

[0090] In this embodiment, the non-sinusoidal excitation is decomposed into multiple sinusoidal harmonic signals superimposed according to the Fourier transform. The order of the decomposed harmonics is determined by the harmonic frequency, and the maximum harmonic frequency is less than 20kHz.

[0091] Optionally, by measuring the magnetic and magnetostrictive properties of nanocrystalline ribbons under multiple harmonic superpositions or non-sinusoidal excitations such as square waves, a foundation can be laid for clarifying the vibration and noise mechanism of high-frequency transformers made from nanocrystalline iron cores.

[0092] Alternatively, non-sinusoidal excitation refers to the process of using waveforms or signals other than sine waves to excite signals or circuits. Non-sinusoidal excitation is often used in testing and measurement fields to verify the performance of circuits or systems under different operating conditions.

[0093] Alternatively, common non-sinusoidal excitations include waveforms such as square waves, pulse waves, and triangular waves. These waveforms can be used to simulate various signals and interferences in the real world, helping engineers to more comprehensively evaluate the performance and robustness of circuits or systems.

[0094] Alternatively, non-sinusoidal excitation is also commonly used in audio systems, such as using various music or noise signals to test the performance of audio devices like speakers and headphones. This method can more realistically simulate various audio signals that might be encountered in actual use, helping users to better select and use equipment.

[0095] Step S203: Determine the equivalent magnetic circuit length under non-sinusoidal excitation.

[0096] In this embodiment, as shown in the aforementioned formula (1), the equivalent magnetic circuit length l under non-sinusoidal excitation is determined. m_s l m The length of the magnetic circuit corresponding to the m-th sinusoidal harmonic (the frequency of the m-th harmonic is less than 20kHz), n is the number of strip laminations, and B mp Let l be the peak magnetic flux density of the m-th harmonic. c This represents the magnetic circuit length corresponding to frequencies exceeding 20kHz, where the peak magnetic flux density is the saturation magnetic flux density of the nanocrystalline ribbon.

[0097] Optionally, the relationship between the effective magnetic circuit length and the magnetic flux density and the amount of strip under non-sinusoidal excitation can be used to more accurately calculate the effective magnetic circuit length under different amounts of strip and different magnetic flux densities under non-sinusoidal excitation, thereby accurately calculating the magnetic field strength in the strip.

[0098] Optionally, the equivalent magnetic path length refers to the length of the magnetic flux transmission path considered within the magnetic circuit. In a magnetic circuit, the magnetic field can propagate along different paths, and the equivalent magnetic path length is an effective length obtained by considering the lengths of all paths combined. It is used to calculate the magnetic reluctance and magnetic reluctance of the magnetic circuit. The magnitude of the equivalent magnetic path length depends on the structure of the magnetic circuit and the distribution of the magnetic field. Typically, the equivalent length of the magnetic circuit can be determined through analysis and calculation, thereby more accurately describing the characteristics and performance of the magnetic circuit.

[0099] Step S204: Apply a non-sinusoidal excitation voltage to the excitation coil.

[0100] In this embodiment, the nanocrystalline alloy strip to be tested is placed in a magnetometer, one end of the strip is fixed, and the other end is allowed to stretch freely. A reflective sheet with excellent reflectivity is attached to the strip in the rolling direction, and a non-sinusoidal excitation voltage is applied to the excitation coil.

[0101] Alternatively, an excitation coil is a device used to generate a magnetic field, typically consisting of wires wound on an insulating material. When an electric current passes through the excitation coil, a magnetic field is generated around it, thus affecting objects within the space enclosed by the coil. Excitation coils are commonly used in equipment such as electromagnetic induction, transformers, generators, and electric motors to generate, transmit, and control magnetic fields.

[0102] Alternatively, nanocrystalline alloy strip is an alloy strip material with a nanocrystalline structure. A nanocrystalline structure refers to a material whose grain size is at the nanometer level, typically less than 100 nanometers. This structure gives the material excellent properties such as high strength, high hardness, good wear resistance, and corrosion resistance.

[0103] Step S205: Determine the magnetic polarization intensity under non-sinusoidal excitation.

[0104] In this embodiment, the magnetic polarization intensity under non-sinusoidal excitation is determined as shown in the aforementioned formula (4).

[0105] Optionally, magnetic polarization refers to the sum of magnetic moments per unit volume, usually represented by a vector M, and its unit is amperes per meter (A / m). Magnetic polarization can represent a material's response to an applied magnetic field and is one of the important parameters of a material's magnetic properties. Its magnitude depends on the magnetic properties of the material and the strength of the applied magnetic field.

[0106] Step S206: Determine the magnetic field strength under non-sinusoidal excitation.

[0107] In this embodiment, the magnetic field strength under non-sinusoidal excitation is determined as shown in the aforementioned formula (2).

[0108] Optionally, magnetic field strength is a physical quantity describing the intensity of a magnetic field, usually represented by the symbol H, and its unit is ampere per meter (A / m). Magnetic field strength refers to the force exerted per unit length in a magnetic field, and is a characterization of the magnetic flux density in the magnetic field. In a magnetic field, the magnetic force on an object is directly proportional to the magnetic field strength, i.e., F = H * l, where F is the magnetic force on the object, H is the magnetic field strength, and l is the length of the object in the magnetic field. The magnitude of magnetic field strength is related to factors such as the magnetic flux density and permeability of the magnetic field.

[0109] Step S207: Determine the magnetostriction under non-sinusoidal excitation.

[0110] In this embodiment, as shown in the aforementioned formula (3), magnetostriction under non-sinusoidal excitation is determined.

[0111] Alternatively, magnetostriction refers to the phenomenon of material deformation under the influence of an applied magnetic field. When a material is placed in an applied magnetic field, the magnetic field causes the magnetic moments inside the material to rearrange, thus producing a magnetostrictive effect. This effect is common in ferromagnetic materials, such as iron, nickel, and cobalt. Under the influence of an applied magnetic field, these materials will deform, that is, they will elongate or contract in the direction of the magnetic field.

[0112] Alternatively, the magnetostrictive effect has wide applications in engineering and science, such as in electromagnetic actuators, precision instruments, and the fabrication of magnetic materials. By controlling the magnitude and direction of an applied magnetic field, precise control of material deformation can be achieved, thereby enabling specific functions such as precision displacement control and sensors.

[0113] Optionally, on the host computer, hysteresis loops and magnetization curves are plotted based on the magnetic polarization intensity and magnetic field intensity of the strip under non-sinusoidal excitation. Magnetostriction butterfly curves and magnetostriction single-value curves are plotted based on the magnetic polarization intensity and magnetostriction, and the magnetostriction spectrum is displayed.

[0114] Optionally, since the nanocrystalline ribbon is very thin and extremely lightweight, when measuring the magnetostriction of the ribbon using a laser vibrometer, the present invention takes into account the influence of the mass of the reflector and corrects the measured vibration velocity to achieve accurate measurement of the magnetostriction of the ribbon.

[0115] Figure 3 This is a schematic diagram of a magnetic property and magnetostriction measurement platform according to an embodiment of the present invention. Figure 3 As shown, the magnetic property and magnetostriction measurement platform 300 includes: a power supply 301, a laser vibration meter 302, a magnetometer 303, a voltage probe 304, a host computer 305, and a current probe 306.

[0116] In this embodiment, the power supply 301 consists of a programmable arbitrary waveform amplifier 3013 and a power amplifier 3012, which are used to provide the required excitation to the magnetometer 303.

[0117] Optionally, the laser vibrometer 302 obtains the magnetostrictive length by measuring the vibration velocity of the sample.

[0118] Optionally, the permeameter 303 mainly includes a magnetic yoke 3031 and coils. The sample to be tested is placed in the middle of the coil frame. Two layers of coils are wound around the coil frame: an outer excitation coil 3032 (also known as the primary coil) and an inner B coil 3033. Additionally, a set of H coils 3034 are placed on the coil frame near the lower surface of the sample. The magnetic yoke 3031 mainly provides a closed magnetic circuit structure for the test sample, while the coils are mainly used for excitation and measurement. A current probe 306 is used to measure the excitation current, and a voltage probe 304 is used to measure the induced voltage of the B coil 3033 and the H coil 3034. The entire device operates on a suspended working platform.

[0119] Optionally, the host computer 305 processes the acquired signals to obtain hysteresis loops and magnetization curves, magnetostrictive butterfly curves and magnetostrictive single-value curves.

[0120] In this embodiment, by determining the expression for the equivalent magnetic circuit length under sinusoidal excitation, the non-sinusoidal excitation is decomposed into a superposition of multiple sinusoidal harmonic signals according to Fourier transform, thereby determining the magnetic polarization, magnetic field strength, and magnetostriction under non-sinusoidal excitation. Then, on the host computer, hysteresis loops and magnetization curves are plotted based on the magnetic polarization and magnetic field strength of the strip under non-sinusoidal excitation. Magnetostriction butterfly curves and single-valued magnetostriction curves are plotted based on the magnetic polarization and magnetostriction, and the magnetostriction spectrum is displayed. This solves the technical problem of being unable to determine the magnetic properties of nanocrystalline ribbons and achieves the technical effect of determining the magnetic properties of nanocrystalline ribbons.

[0121] According to embodiments of the present invention, an apparatus for determining the magnetic properties of nanocrystalline ribbons is also provided. It should be noted that this apparatus for determining the magnetic properties of nanocrystalline ribbons can be used to execute the method for determining the magnetic properties of nanocrystalline ribbons in the method embodiments.

[0122] Figure 4 This is a schematic diagram of a device for determining the magnetic properties of a nanocrystalline ribbon according to an embodiment of the present invention. Figure 4 As shown, the device 400 for determining the magnetic properties of the nanocrystalline ribbon may include: an acquisition unit 401, a decomposition unit 402, a first determination unit 403, and a second determination unit 404.

[0123] Acquisition unit 401 is used to acquire non-sinusoidal excitation data for nanocrystalline ribbons.

[0124] Decomposition unit 402 is used to decompose non-sinusoidal excitation data into multiple sinusoidal harmonic data.

[0125] The first determining unit 403 is used to determine multiple equivalent magnetic circuit lengths based on multiple sinusoidal harmonic data.

[0126] The second determining unit 404 is used to determine the magnetic characteristic information of the nanocrystalline ribbon based on multiple equivalent magnetic circuit lengths, wherein the magnetic characteristic information includes at least magnetic characteristic information and / or magnetostrictive characteristic information.

[0127] Optionally, the first determining unit 402 may include: a first acquiring module, used to acquire the number of nanocrystalline ribbons stacked together, wherein the number of stacks indicates the number of nanocrystalline ribbons stacked together; and a first determining module, used to determine multiple equivalent magnetic circuit lengths based on the number of stacks and multiple sinusoidal harmonic data.

[0128] Optionally, the first determining module may include: a determining submodule for determining the magnetic circuit length and magnetic flux density peak value corresponding to multiple sinusoidal harmonic data; and an analysis submodule for inputting the magnetic circuit length, magnetic flux density peak value and lamination number into the equivalent magnetic circuit length model for analysis to obtain multiple equivalent magnetic circuit lengths, wherein the equivalent magnetic circuit length model is a pre-set model for calculating the equivalent magnetic circuit length.

[0129] Optionally, the second determining unit 404 may include: a second acquisition module for acquiring coil data of the nanocrystalline ribbon, wherein the coil data is used to indicate data related to the coil of the nanocrystalline ribbon; and a first analysis module for inputting the coil data and the equivalent magnetic circuit length into a magnetic characteristic model for analysis to obtain magnetic characteristic information.

[0130] Optionally, the second determining unit 404 may include: a third acquisition module for acquiring sample data of the nanocrystalline ribbon, wherein the sample data is used to indicate data related to the sample; and a second analysis module for inputting the sample data and the equivalent magnetic circuit length into the magnetostrictive characteristic model for analysis to obtain magnetostrictive characteristic information.

[0131] Optionally, the device 400 for determining the magnetic properties of nanocrystalline ribbons may further include a visualization unit for visualizing the magnetic properties information.

[0132] In this embodiment, non-sinusoidal excitation data for a nanocrystalline ribbon is acquired; the non-sinusoidal excitation data is decomposed into multiple sinusoidal harmonic data; based on the multiple sinusoidal harmonic data, multiple equivalent magnetic circuit lengths are determined; based on the multiple equivalent magnetic circuit lengths, the magnetic characteristic information of the nanocrystalline ribbon is determined, wherein the magnetic characteristic information includes at least magnetic characteristic information and / or magnetostrictive characteristic information. In other words, this embodiment of the invention determines the equivalent magnetic circuit length by processing the non-sinusoidal excitation data of the nanocrystalline ribbon, thereby determining the magnetic characteristic information of the nanocrystalline ribbon. This solves the technical problem of being unable to determine the magnetic characteristics of the nanocrystalline ribbon and achieves the technical effect of determining the magnetic characteristics of the nanocrystalline ribbon.

[0133] According to an embodiment of the present invention, a computer-readable storage medium is also provided, the storage medium including a stored program, wherein the program executes a method for determining magnetic property information of nanocrystalline ribbon in a method embodiment.

[0134] According to an embodiment of the present invention, a processor is also provided for running a program, wherein the program executes the method for determining the magnetic properties information of the nanocrystalline ribbon in the method embodiment.

[0135] According to an embodiment of the present invention, a computer program product is also provided, the computer program product including computer instructions, which, when executed by a processor, implement the method for determining the magnetic property information of the nanocrystalline ribbon in the method embodiment.

[0136] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0137] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0138] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0139] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0140] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0141] If the integrated unit is implemented as a software functional unit and sold or used as an independent functional component, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software functional component. This computer software functional component is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0142] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for determining the magnetic properties of a nanocrystalline ribbon, characterized in that, include: Obtain non-sinusoidal excitation data for nanocrystalline ribbons; The non-sinusoidal excitation data is decomposed into multiple sinusoidal harmonic data; Based on the aforementioned sinusoidal harmonic data, multiple equivalent magnetic circuit lengths are determined; Based on multiple equivalent magnetic circuit lengths, the magnetic property information of the nanocrystalline ribbon is determined, wherein the magnetic property information includes at least magnetic property information and / or magnetostrictive property information. The determination of multiple equivalent magnetic circuit lengths based on the multiple sinusoidal harmonic data includes: obtaining the number of stacks of the nanocrystalline ribbon, wherein the number of stacks is used to indicate the number of nanocrystalline ribbons stacked together; and determining multiple equivalent magnetic circuit lengths based on the number of stacks and the multiple sinusoidal harmonic data. The method further includes: visualizing the magnetic property information; The visualization of the magnetic properties includes: plotting the magnetic polarization and magnetic field strength of the nanocrystalline ribbon under non-sinusoidal excitation on a host computer to obtain hysteresis loops and magnetization curves; plotting magnetostriction butterfly curves and magnetostriction single-value curves based on the magnetic polarization and magnetostriction; and displaying the magnetostriction spectrum.

2. The method according to claim 1, characterized in that, Based on the number of laminations and the multiple sinusoidal harmonic data, the multiple equivalent magnetic circuit lengths are determined, including: Determine the magnetic circuit length and peak magnetic flux density corresponding to multiple sinusoidal harmonic data; The magnetic circuit length, the peak magnetic flux density, and the number of laminates are input into the equivalent magnetic circuit length model for analysis to obtain multiple equivalent magnetic circuit lengths. The equivalent magnetic circuit length model is a pre-set model for calculating the equivalent magnetic circuit length.

3. The method according to claim 1, characterized in that, Based on multiple equivalent magnetic circuit lengths, the magnetic property information of the nanocrystalline ribbon is determined, including: Obtain coil data of the nanocrystalline ribbon, wherein the coil data is used to indicate data related to the coil of the nanocrystalline ribbon; The coil data and the equivalent magnetic circuit length are input into the magnetic characteristic model for analysis to obtain the magnetic characteristic information.

4. The method according to claim 1, characterized in that, Based on multiple equivalent magnetic circuit lengths, the magnetic property information of the nanocrystalline ribbon is determined, including: Obtain sample data of the nanocrystalline ribbon, wherein the sample data is used to indicate data related to the sample; The sample data and the equivalent magnetic circuit length are input into the magnetostrictive characteristic model for analysis to obtain the magnetostrictive characteristic information.

5. A device for determining the magnetic properties of nanocrystalline ribbons, characterized in that, include: The acquisition unit is used to acquire non-sinusoidal excitation data for nanocrystalline ribbons; A decomposition unit is used to decompose the non-sinusoidal excitation data into multiple sinusoidal harmonic data. The first determining unit is used to determine multiple equivalent magnetic circuit lengths based on the multiple sinusoidal harmonic data; The second determining unit is used to determine the magnetic characteristic information of the nanocrystalline ribbon based on multiple equivalent magnetic circuit lengths, wherein the magnetic characteristic information includes at least magnetic characteristic information and / or magnetostrictive characteristic information. The first determining unit is further configured to obtain the number of stacks of the nanocrystalline ribbon, wherein the number of stacks is used to indicate the number of nanocrystalline ribbons stacked together; and to determine a plurality of equivalent magnetic circuit lengths based on the number of stacks and the plurality of sinusoidal harmonic data. The second determining unit is also used to visualize the magnetic property information; The second determining unit is also used to plot the magnetic polarization intensity and magnetic field intensity of the nanocrystalline ribbon under non-sinusoidal excitation on the host computer to obtain hysteresis loops and magnetization curves; plot magnetostriction butterfly curves and magnetostriction single-value curves based on the magnetic polarization intensity and magnetostriction; and display the spectrum of the magnetostriction.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein when the program is run by a processor, it controls the device in which the storage medium is located to perform the method of any one of claims 1 to 4.

7. A processor, characterized in that, The processor is used to run a program, wherein the program executes the method according to any one of claims 1 to 4 when it runs.

8. A computer program product, characterized in that, The computer program product includes computer instructions that, when executed by a processor, implement the method described in any one of claims 1 to 4.

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