Three-dimensional magnetic property measuring device and method for electrical magnetic material

Abstract

The invention belongs to the technical field of magnetic property measurement, and discloses a three-dimensional magnetic property measurement device and method for an electrical magnetic material. The upper computer is used for generating and sending an excitation signal to the linear power amplifier; the linear power amplifier is used for amplifying the excitation signal to obtain an amplified excitation signal; a to-be-tested sample is arranged in the center inside the test module; the test module is used for applying the amplified excitation signal to a preset direction of the to-be-tested sample; the amplified excitation signal is used for triggering the sample to be tested to generate induced electromotive force; the test module is also used for collecting induced electromotive force generated by the to-be-tested sample; the upper computer is also used for receiving the induced electromotive force generated by the to-be-tested sample and obtaining a hysteresis loop of the to-be-tested sample according to the induced electromotive force; according to the invention, the amplified excitation signal is applied to the preset direction of the to-be-measured sample, so that magnetic field excitation is generated in any direction of the to-be-measured sample, and the three-dimensional magnetic property of the electrical magnetic material is accurately measured.

Description

Technical Field

[0001] The invention belongs to the technical field of magnetic property measurement, and in particular relates to a three-dimensional magnetic property measurement device and method for electrical magnetic materials. Background Art

[0002] Electrical magnetic materials are widely used in the core materials of motors and transformers to form the main circuit of the magnetic field. Before applying electrical magnetic materials, we must first understand the various magnetic properties of electrical magnetic materials and study the basic laws of their changes under the action of the magnetic field. Only then can we ensure and improve their useful magnetic properties during the processing, thereby giving full play to the potential of the materials in practical applications.

[0003] With the gradual application and promotion of soft magnetic composite materials in the electrical field, relying on their special magnetic isotropy and pressed molding characteristics, the magnetic circuit topology of most electromagnetic equipment is three-dimensional, and its magnetic flux is not limited to a single plane; secondly, the silicon steel laminated core in actual engineering has magnetic saturation characteristics and magnetic anisotropy, especially the magnetic properties perpendicular to the lamination direction are poor; in the actual operation of the transformer, leakage flux will cause the magnetic flux component to pass through the normal plane of the silicon steel lamination; however, the existing magnetic property measurement process cannot meet the requirements of accurate measurement of the magnetic properties on the normal plane of the silicon steel lamination, resulting in large deviations in the magnetic property measurement results of the material. Summary of the invention

[0004] In view of the technical problems existing in the prior art, the present invention provides a three-dimensional magnetic property measurement device and method for electrical magnetic materials, so as to solve the technical problem that the existing magnetic property measurement process cannot meet the requirements of accurately measuring the magnetic properties of silicon steel laminations on the normal plane, resulting in large deviations in the magnetic property measurement results of the material.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides a three-dimensional magnetic property measurement device for electrical magnetic materials, comprising a host computer, a linear power amplifier, a test module and a sample to be tested; The host computer is used to generate and send an excitation signal to the linear power amplifier; The linear power amplifier is used to amplify the excitation signal to obtain an amplified excitation signal; The sample to be tested is arranged at the inner center of the test module; the test module is used to apply the amplified excitation signal to the preset direction of the sample to be tested; wherein the amplified excitation signal is used to trigger the sample to be tested to generate an induced electromotive force; the test module is also used to collect the induced electromotive force generated by the sample to be tested; The host computer is also used to receive and obtain the hysteresis loop of the sample to be tested according to the induced electromotive force generated by the sample to be tested.

[0006] Further, the test module includes a test frame, three sets of excitation coils, six sets of magnetic field intensity sensing coils and three sets of magnetic induction intensity sensing coils; The test frame is a hollow square frame and six support shafts, and the six support shafts are respectively vertically arranged at the centers of the six surfaces of the hollow direction frame; the first end of the support shaft is vertically connected to the center of the surface of the hollow square frame, and the second end of the support shaft extends toward the center of the hollow square frame; wherein the second ends of the six support shafts enclose a sample placement space, and the sample to be tested is arranged in the sample placement space; wherein the sample to be tested is a hexahedral structure; The three groups of excitation coils are respectively wound on three orthogonal support axes, and the three groups of excitation coils are connected to the output end of the linear power amplifier; the six groups of magnetic field strength sensing coils are respectively arranged on the six surfaces of the sample to be tested; the three groups of magnetic induction intensity sensing coils are all annularly wound on the outside of the sample to be tested, and any two groups of magnetic induction intensity sensing coils are orthogonally arranged; wherein the magnetic field strength sensing coil and the magnetic induction intensity sensing coil are connected to the input end of the host computer.

[0007] Furthermore, the test module also includes a sample protection sheet; the sample protection sheet is wrapped around the surface of the sample to be tested and is placed between the magnetic field intensity sensing coil and the magnetic induction intensity sensing coil.

[0008] Furthermore, each group of the magnetic field strength sensing coils includes a first magnetic field strength sensing coil and a second magnetic field strength sensing coil; the first magnetic field strength sensing coil and the second magnetic field strength sensing coil are both arranged on the surface of the sample to be tested, and the first magnetic field strength sensing coil and the second magnetic field strength sensing coil are arranged orthogonally.

[0009] Furthermore, it also includes a data acquisition card and an isolation amplifier; the first input end of the data acquisition card is connected to the output end of the host computer, and the first output end of the data acquisition card is connected to the input end of the linear power amplifier; the second input end of the data acquisition card is connected to the output end of the isolation amplifier, and the second output end of the data acquisition card is connected to the input end of the host computer; the input end of the isolation amplifier is connected to both the magnetic field intensity sensing coil and the magnetic induction intensity sensing coil.

[0010] Furthermore, the data acquisition card adopts a LabVIEW data acquisition card.

[0011] Furthermore, the host computer is also used to receive and obtain the hysteresis loop of the sample to be tested according to the induced electromotive force generated by the sample to be tested, which is specifically as follows: Calculating the magnetic field intensity and magnetic induction intensity generated by the sample to be tested according to the induced electromotive force generated by the sample to be tested; The LabVIEW graphical program preset in the host computer is used to process the magnetic field intensity and magnetic induction intensity generated by the sample to be tested, so as to obtain the hysteresis loop of the sample to be tested.

[0012] Furthermore, the magnetic induction intensity generated by the sample to be tested is specifically:

[0013] in, The sample to be tested generates The magnetic induction intensity in each direction, ; The sample to be tested generates The coefficient of magnetic induction intensity in each direction; The sample to be tested generates The induced electromotive force in one direction.

[0014] Furthermore, the magnetic field strength generated by the sample to be tested is specifically:

[0015] in, The sample to be tested generates The magnetic field strength in each direction, ; The sample to be tested generates The coefficient of magnetic field strength in each direction; The sample to be tested generates The induced electromotive force in the direction; is the magnetic permeability of vacuum.

[0016] The present invention also provides a method for measuring the three-dimensional magnetic properties of electrical magnetic materials, using the three-dimensional magnetic properties measuring device for electrical magnetic materials; Wherein, the three-dimensional magnetic property measurement method comprises: generating an excitation signal; amplifying the excitation signal to obtain an amplified excitation signal; The amplified excitation signal is sent to the test module to apply the amplified excitation signal to a preset direction of the sample to be tested; collecting the induced electromotive force generated by the sample to be tested; The hysteresis loop of the sample to be tested is obtained according to the induced electromotive force generated by the sample to be tested.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The three-dimensional magnetic property measuring device for electrical magnetic materials provided by the present invention sets the sample to be tested at the inner center of the test module, and generates magnetic field excitation in any direction of the sample to be tested by applying the amplified excitation signal to the preset direction of the sample to be tested; by collecting the induced electromotive force generated by the sample to be tested and obtaining the hysteresis loop of the sample to be tested according to the collected induced electromotive force, the three-dimensional magnetic property of the electrical magnetic material can be accurately measured; the device has a simple structure, is easy to operate, and has a high accuracy of measurement results, and is suitable for accurately measuring the magnetic properties of silicon steel laminates on the normal plane.

[0018] Furthermore, six support axes arranged in a square frame are used to clamp the sample to be tested, and three groups of excitation coils are respectively arranged on three orthogonal support axes. By sending amplified excitation signals to the three groups of excitation coils, the amplified excitation signals can be applied to any direction of the sample to be tested, thereby achieving the purpose of measuring the three-dimensional magnetic properties of electrical magnetic materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A structural block diagram of a three-dimensional magnetic property measurement device for electrical magnetic materials provided in Example 1; Figure 2 This is a schematic diagram of the structure of the test module in Example 1; Figure 3 Schematic diagram of the distribution of magnetic field intensity sensing coils and magnetic induction intensity sensing coils in Example 1; Figure 4 is the sample to be tested in Example 1 xoy Schematic diagram of the distribution of magnetic field intensity sensing coils and magnetic induction intensity sensing coils on a plane; Figure 5 This is a flow chart of the method for measuring the three-dimensional magnetic properties of electrical magnetic materials provided in Example 2.

[0021] Among them, 1 host computer, 2 data acquisition card, 3 linear power amplifier, 4 test module, 5 isolation amplifier, 6 sample to be tested; 41 test frame, 42 excitation coil, 43 magnetic field intensity sensor coil, 44 magnetic induction intensity sensor coil, 45 sample protection sheet; 431Hx Coil, 432H y Coil; 441B z Coil. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects solved by this application clearer, the technical solutions in the embodiments of this application will be described clearly and completely in combination with the drawings in the embodiments of this application; obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] Example 1 As attached Figure 1 As shown, this embodiment 1 provides a three-dimensional magnetic property measurement device for electrical magnetic materials, including a host computer 1, a data acquisition card 2, a linear power amplifier 3, a test module 4, an isolation amplifier 5 and a sample to be tested 6.

[0024] The first input end of the data acquisition card 2 is connected to the output end of the host computer 1, the first output end of the data acquisition card 2 is connected to the input end of the linear power amplifier 3, the second input end of the data acquisition card 2 is connected to the output end of the isolation amplifier 5, and the second output end of the data acquisition card 2 is connected to the input end of the host computer 1; preferably, the data acquisition card 2 adopts a LabVIEW data acquisition card.

[0025] The host computer 1 is used to generate and send an excitation signal to the linear power amplifier 3; it is also used to receive and obtain the hysteresis loop of the sample to be tested 6 based on the induced electromotive force generated by the sample to be tested 6; the linear power amplifier 3 is used to amplify the excitation signal to obtain an amplified excitation signal.

[0026] The sample to be tested 6 is arranged at the inner center of the test module 4, and the sample to be tested 6 is a hexahedral structure; preferably, the sample to be tested 6 is a rectangular parallelepiped or cube-shaped structure; the test module 4 is used to apply the amplified excitation signal to the preset direction of the sample to be tested 6; wherein the amplified excitation signal is used to trigger the sample to be tested 6 to generate an induced electromotive force; the test module 4 is also used to collect the induced electromotive force generated by the sample to be tested 6; and the collected induced electromotive force is uploaded to the host computer 1 through the data acquisition card 2 after the isolation and amplification effect of the isolation amplifier 5.

[0027] It should be noted that the linear power amplifier 3 and the isolation amplifier 5 both play a role in enhancing the signal and can protect the measurement module 6 and the host computer 1 to ensure the safety of the measurement process and effectively guarantee the accuracy of the measurement results.

[0028] As attached Figure 2-4 As shown, the test module 4 includes a test frame 41 , three groups of excitation coils 42 , six groups of magnetic field intensity sensing coils 43 , three groups of magnetic induction intensity sensing coils 44 and a sample protection sheet 45 .

[0029] The test frame 41 is a hollow square frame and six support shafts, and the six support shafts are respectively vertically arranged at the centers of the six surfaces of the hollow directional frame; the first end of the support shaft is vertically connected to the center of the surface of the hollow square frame, and the second end of the support shaft extends toward the center of the hollow square frame; wherein, the second ends of the six support shafts are combined to form a sample placement space, and the sample to be tested 6 is arranged in the sample placement space; specifically, the test frame 41 includes six cross-shaped brackets, and the six cross-shaped brackets are connected end to end to form a hollow square frame; wherein, the center of each cross-shaped bracket is located at the center of the six surfaces of the hollow square frame; the first end of the support shaft is vertically connected to the center of the cross-shaped bracket.

[0030] The three groups of excitation coils 42 are respectively wound on three orthogonal support axes, and the three groups of excitation coils 42 are connected to the output ends of the linear power amplifier 3; the six groups of magnetic field strength sensing coils 43 are respectively arranged on the six surfaces of the sample to be tested 6; the three groups of magnetic induction intensity sensor coils 44 are all annularly wound on the outside of the sample to be tested 6, and any two groups of magnetic induction intensity sensing coils 44 are orthogonally arranged; wherein the magnetic field strength sensing coils 43 and the magnetic induction intensity coils 44 are connected to the input ends of the isolation amplifier 5; the sample protection sheet 45 is wrapped around the surface of the sample to be tested 6 and placed between the magnetic field strength sensing coils 43 and the magnetic induction intensity sensing coils 44; it should be noted that the magnetic field strength sensing coils 43 are directly arranged on the surface of the sample to be tested 6, the sample protection sheet 45 is arranged on the outside of the magnetic field strength sensing coils 43, and the magnetic induction intensity sensing coils 44 are arranged on the outside of the sample protection sheet 45; preferably, the material of the sample protection sheet 45 is exactly the same as that of the sample to be tested 6.

[0031] Specifically, each group of the magnetic field strength sensing coils 43 includes a first magnetic field strength sensing coil and a second magnetic field strength sensing coil; the first magnetic field strength sensing coil and the second magnetic field strength sensing coil are both arranged on the surface of the sample to be tested 6, and the first magnetic field strength sensing coil and the second magnetic field strength sensing coil are arranged orthogonally; as shown in the attached Figure 4 As shown, the sample 6 to be tested xoy Taking the plane as an example, H x The coil 431 is located at the sample 6 to be tested. xoy The first magnetic field strength sensing coil on the plane, H y The coil 432 is located at the sample 6 to be tested. xoy The second magnetic field intensity sensing coil on the plane; B z The coil 441 is a group of coils connected to the sample 6. xoy plane parallel magnetic induction intensity sensing coil 44; for the magnetic field intensity sensing coil on the remaining plane of the sample 6 to be tested and the magnetic induction intensity sensing coil and the sample 6 to be tested xoy The coils are set in the same way on the plane, and the winding direction of the coils is consistent with the three-dimensional coordinate system.

[0032] It should be noted that a three-dimensional coordinate system is constructed with a vertex of the sample 6 to be tested as a coordinate point and three orthogonal sides of the sample 6 to be tested as coordinate axes. xyz ; Taking the three-dimensional rectangular coordinate system xyz as reference, there is xoy , xoz , yoz Three planes; among them, xoy On the plane, there is x Direction and y Direction, and x The magnetic field strength parallel to the sensor coil is H x Coil 431, and y The magnetic field strength parallel to the sensor coil is H y Coil 432; xoy The plane is parallel to H x Coil 431 and H y The magnetic induction sensing coil parallel to coil 432 is B z Coil 441; for the sample 6 to be tested, it is a hexahedral structure, and there are two faces respectively connected to xoy , xoz , yoz The planes are parallel, thereby completing the arrangement of the six groups of magnetic field intensity sensing coils 43 and the three groups of magnetic induction intensity sensing coils 44.

[0033] Working principle: The three-dimensional magnetic property measuring device for electrical magnetic materials described in the present embodiment 1 can accurately measure the three-dimensional magnetic properties of electrical magnetic materials by arranging a magnetic field intensity sensing coil and a magnetic induction intensity sensing coil on the outside of the sample 6 to be tested, and measuring the induced electromotive force generated by the sample to be tested based on the induction coil method, thereby obtaining the hysteresis loop of the sample 6 to be tested; wherein, the sample 6 to be tested is arranged at the inner center of the test module 4, and the excitation coil 42 is wound around three orthogonal support axes in the test module 4, and the amplified excitation signal is applied to the preset direction of the sample 6 to be tested by using three groups of excitation coils 42, so as to achieve the three-dimensional magnetic property measurement of the electrical magnetic material. x , y , z The direction can generate arbitrary excitation and has a wide range of applications.

[0034] Specifically, in the test module 4, three groups of excitation coils are used to generate three-dimensional magnetic flux; the upper computer 1 controls the excitation signal waveform, amplifies it through the linear power amplifier 3, and outputs the amplified excitation signal to the excitation coil 42 of the test module 4, thereby controlling the excitation voltage in three axial directions, so that the test module 4 generates different magnetic flux patterns; for example: alternately in any given direction; or rotate on a plane inclined at a preset angle to a certain axis, and rotate in a three-dimensional mode according to the test requirements, so that the trajectory of the tip of the magnetic flux density vector forms an ellipsoid or a sphere; the amplified excitation signal acts on the sample to be tested 6 through the excitation coil 42 ; According to the induction coil method, three groups of magnetic induction sensor coils 44 arranged on the sample to be tested 6 will provide signals of the three directional components of the magnetic flux density vector, and the magnetic field intensity H will be measured by six groups of magnetic field intensity sensor coils 43 placed on the cubic sample; the sample protection sheet 45 tightly wraps the outer side of the sample to be tested 6, which effectively improves the uniformity of the magnetic field distribution in the sample to be tested 6 and improves the accuracy of the magnetic field measurement; the induced voltage of the magnetic field intensity sensor coil 43 and the magnetic induction sensor coil 44 is transmitted back to the host computer 1 through the isolation amplifier 5 and the data acquisition card 2, and after processing, the hysteresis loop of the sample to be tested 6 can be obtained.

[0035] Example 2 As attached Figure 5 As shown, this embodiment 2 provides a three-dimensional magnetic property measurement method for electrical magnetic materials, including: generating an excitation signal; amplifying the excitation signal to obtain an amplified excitation signal; sending the amplified excitation signal to the test module 4 to apply the amplified excitation signal to a preset direction of the sample to be tested 6; collecting the induced electromotive force generated by the sample to be tested 6; and obtaining the hysteresis loop of the sample to be tested 6 based on the induced electromotive force generated by the sample to be tested 6.

[0036] Specifically, the three-dimensional magnetic property measurement method is implemented in the following steps: Step 1: Set an excitation signal in the host computer 1 and output it to the data acquisition card 2. Specifically, in the process of setting the excitation signal in the host computer 1, the waveform of the excitation signal is set in the host computer software LabVIEW preset in the host computer 1.

[0037] Step 2: The output channel of the data acquisition card 2 inputs the excitation signal into the linear power amplifier 3. It should be noted that the excitation signal output by the host computer 1 is input into the linear power amplifier 3 after passing through the data acquisition card 2.

[0038] Step 3: Amplify the excitation signal using the linear power amplifier 3 to obtain an amplified excitation signal, and input the amplified excitation signal into the excitation coil of the test module 4. The linear power amplifier 3 is used to amplify the excitation signal to make it more stable, and input the amplified excitation signal into the excitation coil of the test module 4.

[0039] Step 4: After the amplified excitation signal is input into the excitation coil of the test module 4, the sample to be tested 6 generates an induced electromotive force. The amplified excitation signal acts on the sample to be tested 6 in three-dimensional directions, and the sample to be tested 6 will be magnetized under the action of the external excitation, which is specifically reflected in the generation of an induced electromotive force.

[0040] Step 5: Use the magnetic field intensity sensing coil 43 and the magnetic induction intensity sensing coil 44 to collect the induced electromotive force generated by the sample 6 to be tested, and input the collected induced electromotive force into the input channel of the data acquisition card 2 after passing through the isolation amplifier 5.

[0041] Step 6: The data acquisition card 2 inputs the collected induced electromotive force into the host computer 1 for data processing to obtain the hysteresis loop of the sample to be tested. The process of obtaining the hysteresis loop of the sample to be tested 6 according to the induced electromotive force generated by the sample to be tested 6 is as follows: Step 61 : Calculate the magnetic field intensity and magnetic induction intensity generated by the sample 6 according to the induced electromotive force generated by the sample 6 .

[0042] The magnetic induction intensity generated by the sample 6 to be tested is specifically:

[0043] in, The sample 6 to be tested generates The magnetic induction intensity in each direction, ; The sample 6 to be tested generates The coefficient of magnetic induction intensity in each direction; The sample 6 to be tested generates The induced electromotive force in one direction.

[0044] The LabVIEW graphical program preset in the host computer 1 is used to process the magnetic field intensity and magnetic induction intensity generated by the sample 6 to obtain the hysteresis loop of the sample 6.

[0045] The magnetic field strength generated by the sample 6 to be tested is specifically:

[0046] in, The sample 6 to be tested generates The magnetic field strength in each direction, ; The sample 6 to be tested generates The coefficient of magnetic field strength in each direction; The sample 6 to be tested generates The induced electromotive force in the direction; is the vacuum permeability, taking 4π×10 -7 N / A 2 .

[0047] Step 62 : using the LabVIEW graphical program preset in the host computer 1 , the magnetic field intensity and magnetic induction intensity generated by the sample 6 to be tested are processed to obtain the hysteresis loop of the sample 6 to be tested.

[0048] In this embodiment 2, the software used in the upper computer 1 to generate the excitation signal and process the results is LabVIEW. Graphical programming is used in the program design of LabVIEW, making the program design more intuitive and convenient. It should be noted that when installing the sample to be tested into the test module 4, damage to the coil and sensor system in the device should be avoided.

[0049] The three-dimensional magnetic property measuring device for electrical magnetic materials described in the present invention sets the sample to be tested 6 at the internal center of the test module 4, uses the test module 4 to apply the amplified excitation signal to the preset direction of the sample to be tested 6, and collects the induced electromotive force generated by the sample to be tested 6; the upper computer 1 receives and obtains the hysteresis loop of the sample to be tested 6 according to the induced electromotive force generated by the sample to be tested 6; it should be noted that the hysteresis loop is an important parameter for describing the magnetic properties of magnetic materials. By measuring and analyzing the hysteresis loop, the magnetization process, magnetic saturation phenomenon and hysteresis loss of the material can be obtained; in the present invention, the accurate measurement and analysis of the three-dimensional magnetic properties of electrical magnetic materials are achieved through the characteristics of precise control of excitation signals, efficient amplification, comprehensive test module design, isolation amplification to improve accuracy, automated measurement and strong adaptability.

[0050] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims

1. A three-dimensional magnetic property measuring device for electrical magnetic materials, characterized in that: It includes a host computer (1), a linear power amplifier (3), a test module (4) and a sample to be tested (6); The host computer (1) is used to generate and send an excitation signal to the linear power amplifier (3); The linear power amplifier (3) is used to amplify the excitation signal to obtain an amplified excitation signal; The sample to be tested (6) is arranged at the inner center of the test module (4); the test module (4) is used to apply the amplified excitation signal to the sample to be tested (6) in a preset direction; wherein the amplified excitation signal is used to trigger the sample to be tested (6) to generate an induced electromotive force; the test module (4) is also used to collect the induced electromotive force generated by the sample to be tested (6); The host computer (1) is also used to receive and obtain the hysteresis loop of the sample to be tested (6) based on the induced electromotive force generated by the sample to be tested (6).

2. A three-dimensional magnetic property measuring device for electrical magnetic materials according to claim 1, characterized in that: The test module (4) comprises a test frame (41), three groups of excitation coils (42), six groups of magnetic field intensity sensing coils (43) and three groups of magnetic induction intensity sensing coils (44); The test frame (41) is a hollow square frame and six support shafts, wherein the six support shafts are respectively arranged vertically at the centers of six surfaces of the hollow directional frame; the first ends of the support shafts are vertically connected to the centers of the surfaces of the hollow square frame, and the second ends of the support shafts extend toward the center of the hollow square frame; wherein the second ends of the six support shafts enclose a sample placement space, and the sample to be tested (6) is arranged in the sample placement space; wherein the sample to be tested (6) is a hexahedral structure; The three groups of excitation coils (42) are respectively wound on three orthogonal support axes, and the three groups of excitation coils (42) are all connected to the output end of the linear power amplifier (3); the six groups of magnetic field intensity sensing coils (43) are respectively arranged on six surfaces of the sample to be tested (6); the three groups of magnetic induction intensity sensing coils (44) are all annularly wound on the outside of the sample to be tested (6), and any two groups of magnetic induction intensity sensing coils (44) are orthogonally arranged; wherein the magnetic field intensity sensing coils (43) and the magnetic induction intensity sensing coils (44) are both connected to the input end of the host computer (1).

3. A three-dimensional magnetic property measurement device for electrical magnetic materials according to claim 2, characterized in that: The test module (4) further comprises a sample protection sheet (45); the sample protection sheet (45) is wrapped around the surface of the sample to be tested (6) and is placed between the magnetic field intensity sensing coil (43) and the magnetic induction intensity sensing coil (44).

4. A three-dimensional magnetic property measuring device for electrical magnetic materials according to claim 2, characterized in that: Each group of the magnetic field strength sensing coils (43) comprises a first magnetic field strength sensing coil and a second magnetic field strength sensing coil; the first magnetic field strength sensing coil and the second magnetic field strength sensing coil are both arranged on the surface of the sample to be tested (6), and the first magnetic field strength sensing coil and the second magnetic field strength sensing coil are arranged orthogonally.

5. The three-dimensional magnetic property measuring device for electrical magnetic materials according to claim 2, characterized in that: It also comprises a data acquisition card (2) and an isolation amplifier (5); the first input end of the data acquisition card (2) is connected to the output end of the host computer (1), and the first output end of the data acquisition card (2) is connected to the input end of the linear power amplifier (3); the second input end of the data acquisition card (2) is connected to the output end of the isolation amplifier (5), and the second output end of the data acquisition card (2) is connected to the input end of the host computer (1); the input end of the isolation amplifier (5) is connected to both the magnetic field intensity sensing coil (43) and the magnetic induction intensity sensing coil (44).

6. A three-dimensional magnetic property measuring device for electrical magnetic materials according to claim 5, characterized in that: The data acquisition card (2) adopts a LabVIEW data acquisition card.

7. The three-dimensional magnetic property measuring device for electrical magnetic materials according to claim 1, characterized in that: The host computer (1) is also used to receive and obtain the hysteresis loop of the sample to be tested (6) according to the induced electromotive force generated by the sample to be tested (6), which is specifically as follows: Calculating the magnetic field intensity and magnetic induction intensity generated by the sample to be tested (6) based on the induced electromotive force generated by the sample to be tested (6); The LabVIEW graphical program preset in the host computer (1) is used to process the magnetic field intensity and magnetic induction intensity generated by the sample to be tested (6) to obtain a hysteresis loop of the sample to be tested (6).

8. The three-dimensional magnetic property measuring device for electrical magnetic materials according to claim 7, characterized in that: The magnetic induction intensity generated by the sample to be tested (6) is specifically: in, is the sample to be tested (6) produced along the The magnetic induction intensity in each direction, ; is the sample to be tested (6) produced along the The coefficient of magnetic induction intensity in each direction; is the sample to be tested (6) produced along the The induced electromotive force in one direction.

9. The three-dimensional magnetic property measuring device for electrical magnetic materials according to claim 7, characterized in that: The magnetic field strength generated by the sample to be tested (6) is specifically: in, is the sample to be tested (6) produced along the The magnetic field strength in each direction, ; is the sample to be tested (6) produced along the The coefficient of magnetic field strength in each direction; is the sample to be tested (6) produced along the The induced electromotive force in the direction; is the magnetic permeability of vacuum.

10. A method for measuring the three-dimensional magnetic properties of electrical magnetic materials, characterized in that: Utilize the three-dimensional magnetic property measuring device for electrical magnetic materials as described in any one of claims 1 to 9; Wherein, the three-dimensional magnetic property measurement method comprises: generating an excitation signal; amplifying the excitation signal to obtain an amplified excitation signal; The amplified excitation signal is sent to the test module (4) so ​​as to apply the amplified excitation signal to the sample to be tested (6) in a preset direction; collecting the induced electromotive force generated by the sample to be tested (6); A hysteresis loop of the sample (6) to be tested is obtained based on the induced electromotive force generated by the sample (6) to be tested.

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