Magnetic property testing system for soft magnetic materials

Abstract

This invention discloses a magnetic property testing system for soft magnetic materials, belonging to the field of magnetic material testing technology. Key technical features include an electromagnetic property measurement module, a mechanical property measurement module, an ambient temperature control module, and a test sample. The electromagnetic property measurement module includes an excitation winding and a measurement winding. The test sample is a square ring, comprising two first sides extending along the X-axis and two second sides extending along the Y-axis. The mechanical property measurement module applies stress to the two first sides along the Y-axis, with the stresses on the two first sides in opposite directions. The excitation winding and the measurement winding are wound around the two second sides. The test sample is a single-layer structure or a laminated structure. The square ring-shaped laminated structure of the test sample in this invention allows for simultaneous coupling of four test conditions: magnetic field, temperature, stress, and lamination coefficient, and is suitable for testing ultrathin soft magnetic materials.

Description

Technical Field

[0001] This invention relates to the field of magnetic material testing technology, and more specifically, to a magnetic property testing system for soft magnetic materials. Background Technology

[0002] Currently, methods for testing the magnetic properties of soft magnetic materials include the Epstein square method, the toroidal sample method, and the single-piece measurement method.

[0003] Chinese Patent CN114578274A discloses a device and method for testing the magnetic properties of soft magnetic materials under extremely weak magnetic conditions, wherein the sample used for testing is circular. The testing device includes a DC tester and a coil group wound around the circular sample under test; the DC tester includes an excitation power supply module and a magnetic flux testing module; the coil group includes a primary coil winding connected to the output terminal of the excitation power supply module and a secondary coil winding connected to the output terminal of the magnetic flux testing module.

[0004] However, the annular sample in the aforementioned patent cannot be subjected to stress or is very difficult to apply stress to, making it impossible to measure the magnetic properties of the soft magnetic material under stress conditions.

[0005] A Chinese patent with publication number CN106932741A discloses a device for measuring the temperature and stress effects of the vector magnetic properties of an electrical steel sheet, wherein the electrical steel sheet used for testing is cross-shaped. The measuring device includes an excitation magnetic circuit module, a temperature loading module, a signal detection module, a stress loading module, and a support module; the excitation magnetic circuit module includes two upper and lower U-shaped magnetic yokes, and the electrical steel sheet to be tested is placed between the upper and lower magnetic yokes.

[0006] However, the measuring device in the aforementioned patent still has the following problems: 1. It uses a single sample for measurement, but a single sample is prone to twisting and deformation, making the measuring device unsuitable for ultrathin soft magnetic materials; 2. It does not consider the influence of the lamination factor on the magnetic properties parameters, and the measuring device is also unsuitable or difficult to apply to measuring the magnetic properties parameters of materials with different lamination factors; 3. When compressive stress is applied, it is impossible to measure the magnetic properties parameters perpendicular to the stress direction; 4. The measuring device is relatively complex, and its production, manufacturing, and operation are difficult. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a magnetic property testing system for soft magnetic materials. The test sample adopts a square ring-shaped stacked structure, which can simultaneously couple four test conditions: magnetic field, temperature, stress, and stacking coefficient. Moreover, it is suitable for testing ultrathin soft magnetic materials.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A magnetic property testing system for soft magnetic materials includes an electromagnetic property measurement module, a mechanical property measurement module, and a test sample. The electromagnetic property measurement module includes an excitation winding and a measurement winding.

[0010] The test sample is in the shape of a square ring, which includes two first sides extending along the X-axis and two second sides extending along the Y-axis.

[0011] The mechanical characteristic measurement module acts on the two first sides to apply stress along the Y-axis, and the directions of the stress on the two first sides are opposite; the excitation winding and the measurement winding are respectively wound on the two second sides;

[0012] The test sample is a single-layer structure or a stacked structure.

[0013] Furthermore, the test specimens include tensile stress test specimens and / or compressive stress test specimens;

[0014] The width of the first side of the tensile stress test specimen is greater than the width of its second side;

[0015] The width of the first side of the compressive stress test specimen is smaller than the width of its second side.

[0016] Furthermore, the mechanical property measurement module also includes a tensile stress testing fixture that mates with the tensile stress test specimen;

[0017] The tensile stress testing fixture includes two clamping plate assemblies that act on the first side respectively, and two tension plates that act on the first side respectively;

[0018] The clamping plate assembly includes two clamping plates that clamp the first side therebetween, and a fastening assembly is provided between the two clamping plates;

[0019] The pull plate is in contact with the inner wall of the first side;

[0020] The pull plate is provided with a first limit adjustment component, which cooperates with the pull plate to limit the clamping plate assembly along the Z-axis direction.

[0021] Furthermore, two positioning protrusions are provided on the first side, and the two positioning protrusions are located on both sides of the pull plate respectively.

[0022] Furthermore, the pull plate includes a pull plate body extending along the Y-axis, a pull plate fixing block perpendicularly disposed at one end of the pull plate body, and a pull plate stress-applying block perpendicularly disposed at the other end of the pull plate body; the pull plate fixing block and the pull plate stress-applying block are located on the same side of the pull plate body; an auxiliary block is disposed on the pull plate stress-applying block;

[0023] The first limit adjustment assembly includes a first adjustment bolt passing through the auxiliary block, and a first pad block located between the first adjustment bolt and the clamping plate assembly;

[0024] The first adjusting bolt drives the first pad to move along the Z-axis, so that the clamping plate assembly is clamped between the first pad and the pull plate body.

[0025] Furthermore, the mechanical property measurement module also includes a compressive stress testing fixture that cooperates with the compressive stress test specimen;

[0026] The compressive stress testing fixture includes two pressure plates that act on the two first sides respectively, and a support assembly disposed between the two first sides;

[0027] The pressure plate is in contact with the outer side wall of the first side;

[0028] The pressure plate is provided with a second limit adjustment component, which cooperates with the pressure plate to limit the first edge along the Z-axis direction;

[0029] The two ends of the support component are respectively in contact with the inner sidewalls of the two first sides, and the two ends of the support component are respectively provided with a third limiting adjustment component. The third limiting adjustment component cooperates with the support component to limit the first side along the Z-axis direction.

[0030] A gap is formed between the pressure plate and the support assembly.

[0031] Furthermore, two positioning protrusions are provided on the first side, which are located on both sides of the pressure plate, or on both sides of the support assembly.

[0032] Furthermore, the pressure plate has a first slot, and the first side is embedded in the first slot; the second limiting adjustment component includes a second adjusting bolt passing through the pressure plate and a second pad located in the first slot; the second adjusting bolt drives the second pad to move along the Z-axis direction, so that the first side is clamped between the second pad and the inner wall of the first slot;

[0033] The support assembly includes a support body and support blocks located at both ends of the support body; the support body and the support blocks are detachably connected.

[0034] The support block is provided with a second slot, and the first side is embedded in the second slot; the third limiting adjustment component includes a third adjusting bolt passing through the support block and a third pad located in the second slot; the third adjusting bolt drives the third pad to move along the Z-axis direction, so that the first side is clamped between the third pad and the inner wall of the second slot;

[0035] The second pad and the third pad are located on opposite sides of the first side.

[0036] Furthermore, the system also includes an ambient temperature regulation module, which includes a temperature-regulating cavity for placing the test sample;

[0037] The mechanical property measurement module includes two first lever arms and second lever arms that extend along the Y-axis and are arranged opposite to each other, and the first lever arms and second lever arms respectively extend into the temperature control cavity;

[0038] The electromagnetic characteristic measurement module also includes a magnetic performance measuring instrument arranged on the outside of the temperature-regulating cavity; the side wall of the temperature-regulating cavity is provided with an adapter socket, the excitation winding and the measuring winding are connected to the inner port of the adapter socket, and the magnetic performance measuring instrument is connected to the outer port of the adapter socket.

[0039] Furthermore, temperature measuring heads are respectively installed on the two second sides.

[0040] In summary, the present invention has the following beneficial effects:

[0041] 1. The test sample adopts a square ring-shaped stacked structure, which can simultaneously couple the four test conditions of magnetic field, temperature, stress and stacking coefficient, thereby improving the test effect;

[0042] 2. The use of a stacked structure enables the testing of ultrathin soft magnetic materials, thus improving the system's testing range;

[0043] 3. For tensile stress test specimens, the cross-sectional area of ​​the first side is larger than that of the second side. Therefore, the loss on the second side is mainly measured. The wider first side not only helps to prevent the specimen from breaking, but also reduces iron loss and measurement error.

[0044] 4. For the compressive stress test specimen, the cross-sectional area of ​​the first side is smaller than that of the second side. Therefore, the loss on the first side is mainly measured, while the loss on the second side is smaller, which helps to reduce measurement error. At the same time, the compressive stress is also applied to the first side. The compressive stress is along the Y-axis, and the magnetic circuit direction on the first side is along the X-axis. Therefore, the direction of the compressive stress is perpendicular to the magnetic circuit direction, which simulates the actual state of the silicon steel sheet when working in a specific situation and improves the measurement effect.

[0045] 5. Using a tensile stress testing fixture to apply tensile stress to the tensile stress test specimen and a compressive stress testing fixture to apply compressive stress to the compressive stress test specimen is beneficial to improving the stability of the test specimen during the measurement process, avoiding twisting or deformation of the test specimen, and improving measurement accuracy. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the structure of the soft magnetic material magnetic property testing system in the embodiment. Figure 1 ;

[0047] Figure 2 This is a schematic diagram of the structure of the soft magnetic material magnetic property testing system in the embodiment. Figure 2 ;

[0048] Figure 3 This is a schematic diagram of the structure of the soft magnetic material magnetic property testing system in the embodiment. Figure 3 ;

[0049] Figure 4 This is a schematic diagram of the tensile stress test specimen in the embodiment;

[0050] Figure 5 Schematic diagram of the tensile stress test specimen and tensile stress test fixture. Figure 1 ;

[0051] Figure 6 Schematic diagram of the tensile stress test specimen and tensile stress test fixture. Figure 2 ;

[0052] Figure 7 Schematic diagram of the tensile stress test specimen and tensile stress test fixture. Figure 3 ;

[0053] Figure 8 This is a schematic diagram of the structure of the soft magnetic material magnetic property testing system in the embodiment. Figure 4 ;

[0054] Figure 9 This is a schematic diagram of the compressive stress test specimen in the embodiment;

[0055] Figure 10 Schematic diagram of the structure of the test specimen and compressive stress testing fixture for implementing medium compressive stress testing. Figure 1 ;

[0056] Figure 11 Schematic diagram of the structure of the test specimen and compressive stress testing fixture for implementing medium compressive stress testing. Figure 2 ;

[0057] Figure 12 Schematic diagram of the structure of the test specimen and compressive stress testing fixture for implementing medium compressive stress testing. Figure 3 ;

[0058] Figure 13 This is a schematic diagram of the supporting component in the embodiment.

[0059] In the diagram: 1. Ambient temperature control module; 11. Temperature control chamber; 12. Adapter socket; 2. Mechanical characteristic measurement module; 21. First lever arm; 22. Second lever arm; 3. Magnetic property measuring instrument; 31. Excitation winding; 32. Measuring winding; 4a. Tensile stress test specimen; 4b. Compressive stress test specimen; 41. First side; 42. Second side; 43. Positioning protrusion; 5. Temperature measuring head; 6. Tensile stress testing fixture; 61. Clamping plate 62. Pull plate; 621. Pull plate body; 622. Pull plate fixing block; 623. Pull plate stress application block; 624. Auxiliary block; 63. First adjusting bolt; 64. First pad block; 7. Compressive stress testing fixture; 71. Pressure plate; 711. First slot; 72. Support body; 73. Support block; 731. Second slot; 74. Second adjusting bolt; 75. Second pad block; 76. Third adjusting bolt; 77. Third pad block. Implementation

[0060] The present invention will be further described in detail below with reference to the accompanying drawings.

[0061] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention. Example

[0062] A magnetic property testing system for soft magnetic materials, referring to Figures 1 to 13It includes an ambient temperature regulation module 1, a mechanical property measurement module 2, an electromagnetic property measurement module, and a test sample, which is a soft magnetic material. The ambient temperature regulation module 1 includes a temperature-regulating cavity 11. During testing, the test sample is placed in the temperature-regulating cavity 11, and the temperature inside the temperature-regulating cavity 11 can be adjusted to place the test sample in a low-temperature or high-temperature environment for testing. Specifically, in this embodiment, the temperature regulation range inside the temperature-regulating cavity 11 is -70℃ to 200℃. In this embodiment, the mechanical property measurement module 2 is used to apply adjustable tensile or compressive stress. Specifically, in this embodiment, the mechanical property measurement module includes two first lever arms 21 and second lever arms 22 that extend along the Y-axis and are arranged opposite to each other. The mechanical property measurement module 2 extends into the temperature-regulating cavity 11, thereby applying tensile or compressive stress to the test sample within the cavity. Specifically, in this embodiment, the stress adjustment range of the mechanical property measurement module 2 is -100kN to 100kN, enabling the application of high-precision, wide-range stress to the test sample. In this embodiment, the electromagnetic property measurement module includes a magnetic property measuring instrument 3 arranged on the outside of the temperature-regulating cavity 11, and an excitation winding 31 and a measuring winding 32 wound around the test sample. Preferably, a converter socket 12 is embedded in the side wall of the temperature-regulating cavity 11, with the excitation winding 31 and the measuring winding 32 connected to the inner port of the converter socket 12, and the magnetic property measuring instrument 3 connected to the outer port of the converter socket 12, thereby improving the sealing performance of the temperature-regulating cavity 11. This embodiment employs the ambient temperature regulation module 1, the mechanical property measurement module 2, and the electromagnetic property measurement module to achieve simultaneous coupling of the three test conditions: magnetic field, temperature, and stress, thereby enabling the testing of the magnetic properties of soft magnetic materials under complex working conditions.

[0063] Reference Figures 1 to 13In this embodiment, the test sample is a square ring, comprising two first sides 41 extending along the X-axis and two second sides 42 extending along the Y-axis. A first lever arm 21 and a second lever arm 22 act on the two first sides 41 respectively to apply stress along the Y-axis, and the stresses on the two first sides 41 are in opposite directions; that is, the two first sides 41 are subjected to tensile stresses or compressive stresses in opposite directions. An excitation winding 31 and a measuring winding 32 are wound around the two second sides 42 respectively. The magnetic performance measuring instrument 3 applies excitation to the excitation winding 31, thereby generating a closed magnetic circuit in the test sample. The measuring winding 32 induces an alternating current, and the magnetic performance data can be obtained by calculating the alternating current. In this embodiment, a temperature measuring head 5 is also provided on the second side 42. Specifically, in this embodiment, the temperature measuring head 5 is a thermocouple attached to the second side 42 to monitor the temperature rise generated during the measurement process, avoid the temperature affecting the magnetic properties of the test sample, and improve the accuracy of the test data. In this embodiment, the test sample is a stacked structure, composed of multiple layers of silicon steel sheets, so that the magnetic property parameters of soft magnetic materials under different stacking coefficients can be tested by changing the stacking coefficient. At the same time, the stacked structure can also improve the structural strength of the test sample and reduce the twisting and deformation of the test sample, thereby enabling the testing of ultrathin soft magnetic materials. Of course, in other optional embodiments, the system can also test single-layer square ring-shaped test samples, which is not limited here. That is to say, the test system in this embodiment can simultaneously couple the four test conditions of magnetic field, temperature, stress, and stacking coefficient, thereby improving the test effect.

[0064] Reference Figures 1 to 13 To simultaneously couple the four test conditions—magnetic field, temperature, stress, and lamination factor—the key in this embodiment is setting the test sample to a square ring shape. This square ring shape allows stress to be applied to the test sample, achieving simultaneous coupling of the magnetic field, temperature, and stress. Furthermore, excitation windings and measurement windings can be arranged on the square ring-shaped, laminated test sample to achieve simultaneous coupling of the magnetic field, temperature, stress, and lamination factor. In addition, the square ring shape, laminated structure, and the combination of excitation and measurement windings help reduce production and operational difficulties and improve measurement accuracy.

[0065] Reference Figures 1 to 13In this embodiment, the test specimens include a tensile stress test specimen 4a and a compressive stress test specimen 4b. The width of the first side 41 of the tensile stress test specimen 4a is greater than the width of its second side 42. A winding is wound on the narrower second side 42, and tensile stress is applied on the wider first side 41. This helps to avoid damage to the test specimen during the application of tensile stress. The magnetic flux is uniform throughout the tensile stress test specimen 4a. The larger the cross-sectional area, the smaller the magnetic flux density and the smaller the iron loss. In this embodiment, the cross-sectional area of ​​the first side 41 is greater than the cross-sectional area of ​​the second side 42. Therefore, the loss on the second side 42 is mainly measured. The wider first side 41 not only helps to prevent the specimen from breaking but also reduces iron loss and measurement error. Preferably, the inner and outer apex angles of the tensile stress test specimen 4a are rounded, which helps to ensure uniform flow of magnetic lines of force inside and facilitates calculation and analysis.

[0066] Reference Figures 1 to 13 The width of the first side 41 of the compressive stress test specimen 4b is smaller than the width of its second side 42. The winding is wound on the wider second side 42, and compressive stress is applied on the narrower first side 41. The cross-sectional area of ​​the first side 41 is smaller than that of the second side 42, so the loss on the first side 41 is mainly measured, while the loss on the second side 42 is smaller, which helps to reduce measurement error. At the same time, the compressive stress is also applied to the first side 41. The compressive stress is along the Y-axis direction, and the magnetic circuit direction on the first side 41 is along the X-axis direction. Therefore, the direction of the compressive stress is perpendicular to the magnetic circuit direction, which simulates the actual state of the silicon steel sheet when working in a specific situation and improves the measurement effect.

[0067] Reference Figures 1 to 7In this embodiment, the mechanical property measurement module 2 further includes a tensile stress testing fixture 6 that cooperates with the tensile stress test specimen 4a. Specifically, the tensile stress testing fixture 6 includes two clamping plate assemblies that act on the first side 41 respectively, and two pull plates 62 that act on the first side 41 respectively. The clamping plate assembly includes two clamping plates 61 that clamp the first side 41 therein, and a fastening assembly is provided between the two clamping plates 61, which helps to prevent the first side 41 from deforming. Specifically, in this embodiment, the fastening assembly is a bolt and nut assembly, that is, the two clamping plates 61 are fastened together by multiple bolt and nut assemblies. The pull plate 62 contacts the inner wall of the first side 41, that is, the pull plate 62 contacts the inner wall of the first side 41. Tensile stress is applied to the sidewall, which helps to improve the stability of the tensile stress. A first limit adjustment component is provided on the pull plate 62. The first limit adjustment component cooperates with the pull plate 62 to limit the clamping plate assembly along the Z-axis direction, thereby helping to ensure the stability of the test sample when subjected to tensile stress. Preferably, two positioning protrusions 43 are provided on the first side 41, and the two positioning protrusions 43 are respectively located on both sides of the pull plate 62. Specifically, the two positioning protrusions 43 are symmetrically arranged on the inner sidewall of the first side 41 to realize the positioning between the first side 41 and the pull plate 62 along the X-axis direction, so as to avoid the test sample and the tooling from being misaligned along the X-axis direction, and also to avoid inconsistent force on the test sample due to differences in operation.

[0068] Reference Figures 1 to 7 Specifically, the pull plate 62 includes a pull plate body 621 extending along the Y-axis, a pull plate fixing block 622 vertically disposed at one end of the pull plate body 621, and a pull plate stress-applying block 623 vertically disposed at the other end of the pull plate body 621; the pull plate fixing block 622 and the pull plate stress-applying block 623 are located on the same side of the pull plate body 621; the two pull plate fixing blocks 622 are respectively connected to the first lever arm 21 and the second lever arm 22; an auxiliary block 624 is disposed on the pull plate stress-applying block 623; the first limit adjustment assembly includes a component passing through the auxiliary block. The first adjusting bolt 63 on 624, and the first pad 64 located between the first adjusting bolt 63 and the clamping plate assembly; the first adjusting bolt 63 applies a force along the Z-axis to the first pad 64, driving the first pad 64 to move, so that the clamping plate assembly is clamped between the first pad 64 and the pull plate body 621, thereby limiting the clamping plate assembly along the Z-axis, which helps to improve the stability of the test sample; of course, in other optional embodiments, the tensile stress testing fixture can also adopt other structures, which are not limited here.

[0069] Reference Figures 1 to 13The mechanical property measurement module 2 also includes a compressive stress testing fixture 7 that cooperates with the compressive stress test specimen 4b; the compressive stress testing fixture 7 includes two pressure plates 71 that act on the two first sides 41 respectively, and a support assembly disposed between the two first sides 41; the pressure plates 71 are in contact with the outer walls of the first sides 41, that is, the pressure plates 71 apply compressive stress to the outer walls of the first sides 41; in this embodiment, the two pressure plates 71 are respectively connected to the first lever arm 21 and the second lever arm 22; a second limit adjustment assembly is provided on the pressure plate 71, and the second limit adjustment assembly cooperates with the pressure plate 71 to exert compressive stress on the first side 41 along the Z-axis. The support assembly is positioned to limit the movement of the first side 41, thereby improving the stability of the test sample and preventing torsional deformation. Both ends of the support assembly contact the inner walls of the two first sides 41, and each end of the support assembly is equipped with a third limiting adjustment assembly. The third limiting adjustment assembly works in conjunction with the support assembly to limit the movement of the first side 41 along the Z-axis, thus improving the stability of the test sample and preventing torsional deformation. A gap is formed between the pressure plate 71 and the support assembly, meaning that during the application of compressive stress, the pressure plate 71 does not contact the support assembly, thereby enabling accurate application of compressive stress to the first side 41.

[0070] Reference Figures 1 to 13The first side 41 is provided with two positioning protrusions 43, which are located on both sides of the support assembly. Specifically, the two positioning protrusions 43 are symmetrically arranged on the inner wall of the first side 41 to achieve positioning between the first side 41 and the support assembly along the X-axis, avoiding misalignment between the test sample and the tooling along the X-axis, and preventing inconsistent force on the test sample due to operational differences. The pressure plate 71 is provided with a first slot 711, and the first side 41 is embedded in the first slot 711. The second limit adjustment assembly includes a second adjusting bolt 74 passing through the pressure plate 71, and a positioning... A second pad 75 is located within the first slot 711; a second adjusting bolt 74 applies a force along the Z-axis to the second pad 75, driving the second pad 75 to move, so that the first side 41 is clamped between the second pad 75 and the inner wall of the first slot 711, thereby limiting the first side 41 and improving the stability of the test sample to prevent torsion deformation; the support assembly includes a support body 72 and support blocks 73 located at both ends of the support body 72; the support body 72 and the support blocks 73 are detachably connected; a second slot 731 is provided on the support block 73, and the first side 41 The third limiting adjustment assembly includes a third adjusting bolt 76 passing through the support block 73 and a third pad 77 located in the second slot 731; the third adjusting bolt 76 applies a force along the Z-axis to the third pad 77, driving the third pad 77 to move, so that the first side 41 is clamped between the third pad 77 and the inner wall of the second slot 731, thereby limiting the first side 41; the second pad 75 and the third pad 77 are located on both sides of the first side 41, which helps to improve the stability of the test sample and avoid torsional deformation; in this embodiment, the support block 75 is embedded in the second slot 731; the third limiting adjustment assembly includes a third adjusting bolt 76 passing through the support block 73 and a third pad 77 located in the second slot 731; the third adjusting bolt 76 applies a force along the Z-axis to the third pad 77, driving the third pad 77 to move, so that the first side 41 is clamped between the third pad 77 and the inner wall of the second slot 731, thereby limiting the first side 41; the second pad 75 and the third pad 77 are located on both sides of the first side 41, thereby helping to improve the stability of the test sample and avoid torsional deformation; in this embodiment, the support block 75 is embedded in the second slot 731; the third limiting adjustment assembly includes a third adjusting bolt 76 passing through the support block 73 and a third pad 77 located in the second slot 731; the third limiting adjustment assembly includes a third adjusting bolt 76 passing through the support block 73 and a third pad 77 located in the second slot 731; the third adjusting bolt 76 applies a force along the Z-axis to the third pad 77, driving the third pad 77 to move, so that the first side 41 is clamped between the third pad 77 and the inner wall of the second slot 731, thereby limiting the first side 41; the second pad 75 and the third pad 7 The support block 73 and the support body 72 are detachably connected by bolts. During installation, the two support blocks 73 are first inserted into the compressive stress test specimen 4b, and the first side 41 is embedded in the second slot 731. Then, the support body 72 is inserted between the two support blocks 73, and the support blocks 73 and the support body 72 are connected by bolts. That is to say, the support block 73 and the support body 72 are detachably connected to facilitate the installation of the compressive stress test specimen 4b. Of course, in other optional embodiments, the compressive stress test fixture 7 can also adopt other structures, which are not limited here.

Claims

1. A magnetic property testing system for soft magnetic materials, comprising an electromagnetic property measurement module, a mechanical property measurement module, and a test sample, wherein the electromagnetic property measurement module includes an excitation winding and a measurement winding; characterized in that: The test sample is in the shape of a square ring, which includes two first sides extending along the X-axis and two second sides extending along the Y-axis. The mechanical characteristic measurement module acts on the two first sides to apply stress along the Y-axis, and the directions of the stress on the two first sides are opposite; the excitation winding and the measurement winding are respectively wound on the two second sides; The test sample is a single-layer structure or a stacked structure; The test specimens include tensile stress test specimens and / or compressive stress test specimens; The width of the first side of the tensile stress test specimen is greater than the width of its second side; The width of the first side of the compressive stress test specimen is smaller than the width of its second side; The system also includes an ambient temperature regulation module, which includes a temperature-regulating cavity for placing the test sample; The mechanical property measurement module includes two first lever arms and second lever arms that extend along the Y-axis and are arranged opposite to each other, and the first lever arms and second lever arms respectively extend into the temperature control cavity; The electromagnetic property measurement module also includes a magnetic property measuring instrument arranged on the outside of the temperature control cavity; Temperature measuring heads are installed on the two second sides respectively.

2. The soft magnetic material magnetic property testing system according to claim 1, characterized in that: The mechanical property measurement module also includes a tensile stress testing fixture that mates with the tensile stress test specimen; The tensile stress testing fixture includes two clamping plate assemblies that act on the first side respectively, and two tension plates that act on the first side respectively; The clamping plate assembly includes two clamping plates that clamp the first side therebetween, and a fastening assembly is provided between the two clamping plates; The pull plate is in contact with the inner wall of the first side; The pull plate is provided with a first limit adjustment component, which cooperates with the pull plate to limit the clamping plate assembly along the Z-axis direction.

3. The soft magnetic material magnetic property testing system according to claim 2, characterized in that: Two positioning protrusions are provided on the first side, and the two positioning protrusions are located on both sides of the pull plate respectively.

4. The soft magnetic material magnetic property testing system according to claim 2, characterized in that: The pull plate includes a pull plate body extending along the Y-axis, a pull plate fixing block perpendicularly disposed at one end of the pull plate body, and a pull plate stress-applying block perpendicularly disposed at the other end of the pull plate body; the pull plate fixing block and the pull plate stress-applying block are located on the same side of the pull plate body; an auxiliary block is disposed on the pull plate stress-applying block; The first limit adjustment assembly includes a first adjustment bolt passing through the auxiliary block, and a first pad block located between the first adjustment bolt and the clamping plate assembly; The first adjusting bolt drives the first pad to move along the Z-axis, so that the clamping plate assembly is clamped between the first pad and the pull plate body.

5. The soft magnetic material magnetic property testing system according to claim 1, characterized in that: The mechanical property measurement module also includes a compressive stress testing fixture that works in conjunction with the compressive stress test specimen; The compressive stress testing fixture includes two pressure plates that act on the two first sides respectively, and a support assembly disposed between the two first sides; The pressure plate is in contact with the outer side wall of the first side; The pressure plate is provided with a second limit adjustment component, which cooperates with the pressure plate to limit the first edge along the Z-axis direction; The two ends of the support component are respectively in contact with the inner sidewalls of the two first sides, and the two ends of the support component are respectively provided with a third limiting adjustment component. The third limiting adjustment component cooperates with the support component to limit the first side along the Z-axis direction. A gap is formed between the pressure plate and the support assembly.

6. The soft magnetic material magnetic property testing system according to claim 5, characterized in that: Two positioning protrusions are provided on the first side, which are located on both sides of the pressure plate, or on both sides of the support component.

7. The soft magnetic material magnetic property testing system according to claim 5, characterized in that: The pressure plate has a first slot, and the first side is embedded in the first slot; the second limiting adjustment component includes a second adjusting bolt passing through the pressure plate and a second pad located in the first slot; the second adjusting bolt drives the second pad to move along the Z-axis direction, so that the first side is clamped between the second pad and the inner wall of the first slot; The support assembly includes a support body and support blocks located at both ends of the support body; the support body and the support blocks are detachably connected. The support block is provided with a second slot, and the first side is embedded in the second slot; the third limiting adjustment component includes a third adjusting bolt passing through the support block and a third pad located in the second slot; the third adjusting bolt drives the third pad to move along the Z-axis direction, so that the first side is clamped between the third pad and the inner wall of the second slot; The second pad and the third pad are located on opposite sides of the first side.

8. The soft magnetic material magnetic property testing system according to claim 1, characterized in that: The side wall of the temperature-regulating cavity is fitted with an adapter socket. The excitation winding and the measuring winding are connected to the inner port of the adapter socket, and the magnetic performance measuring instrument is connected to the outer port of the adapter socket.

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