CN219936082U - Experimental device for measuring direct-current magnetic circuit characteristics of ferromagnetic material - Google Patents
Experimental device for measuring direct-current magnetic circuit characteristics of ferromagnetic material Download PDFInfo
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- CN219936082U CN219936082U CN202320922868.1U CN202320922868U CN219936082U CN 219936082 U CN219936082 U CN 219936082U CN 202320922868 U CN202320922868 U CN 202320922868U CN 219936082 U CN219936082 U CN 219936082U
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 51
- 239000003302 ferromagnetic material Substances 0.000 title claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000000523 sample Substances 0.000 claims description 35
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000002474 experimental method Methods 0.000 abstract description 6
- 230000006698 induction Effects 0.000 description 6
- 239000000696 magnetic material Substances 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses a ferromagnetic material direct current magnetic circuit characteristic measurement experiment device which is characterized by comprising a sample bracket, a sample assembly and a measurement combination, wherein the sample bracket is arranged on the movable ruler assembly, the sample assembly is arranged on the sample bracket, and the measurement combination is connected with the sample assembly; the movable ruler assembly comprises a movable base, a movable rod which is slidably arranged on the movable base, and a graduated scale and a vernier which are respectively arranged on the movable base and the movable rod; the sample assembly comprises an I-shaped iron core, an E-shaped iron core, a magnetizing coil wound on the E-shaped iron core and a sensor strip which can be inserted and placed on the I-shaped iron core; the measuring assembly comprises a reversing knife connected with the magnetizing coil and a change-over switch connected with the sensor strip. The distance between the I-shaped iron core and the E-shaped iron core is accurately adjusted by utilizing the movable ruler assembly, so that the size of the parallel air gap between the I-shaped iron core and the E-shaped iron core is convenient to change.
Description
Technical Field
The utility model relates to a ferromagnetic material teaching experiment device, in particular to a ferromagnetic material direct current magnetic circuit characteristic measurement experiment device.
Background
The ferromagnetic material is mainly used in the motor manufacturing industry and the IT industry, and has important significance in theory or practical use for researching the performance of the ferromagnetic material.
The magnetization process of a ferromagnetic substance is complicated mainly because it has magnetism. The magnetization rule is generally studied by measuring the relationship between the magnetic field strength H and the magnetic induction strength B of the magnetization field.
Ferromagnetic materials are classified into hard magnetic and soft magnetic; the hysteresis loop width of the hard magnetic material is suitable for manufacturing permanent magnets; the hysteresis loop of the soft magnetic material is narrow, and the soft magnetic material is commonly used as a transformer and the like working under dynamic conditions. The hysteresis loop is an important characteristic of the material, and the magnetic characteristic of the magnetic measurement material is that the national university and college physics are necessary to make experiments, and can also be used as a relevant design reference basis.
Because of the influence of hysteresis loss and the like in the ferromagnetic material, the magnetic characteristic of the ferromagnetic material is measured by the AC sine electricity commonly adopted in the current universities, and the area of the measured hysteresis loop is larger. Therefore, the influence of eddy current loss and the like can be eliminated by using the direct current magnetic circuit characteristic measurement, students can obtain the basic magnetic characteristic of the direct current electromagnetic measuring ferromagnetic material, and the area of a measured hysteresis loop is more accurate. Therefore, a test device for measuring the direct current magnetic circuit characteristics of ferromagnetic materials is provided.
Disclosure of Invention
The utility model aims to solve the problems and provides an experimental device for measuring the direct current magnetic circuit characteristics of a ferromagnetic material.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the experimental device for measuring the characteristics of the direct-current magnetic circuit of the ferromagnetic material is characterized by comprising a sample bracket, a sample assembly and a measuring combination, wherein the sample bracket is arranged on the moving ruler assembly, the sample assembly is arranged on the sample bracket, and the measuring combination is connected with the sample assembly; the movable ruler assembly comprises a movable base, a movable rod which is slidably arranged on the movable base, and a graduated scale and a vernier which are respectively arranged on the movable base and the movable rod; the sample assembly comprises an I-shaped iron core, an E-shaped iron core, a magnetizing coil wound on the E-shaped iron core and a sensor strip which can be inserted and placed on the I-shaped iron core; the measuring assembly comprises a reversing knife connected with the magnetizing coil and a change-over switch connected with the sensor strip.
Preferably, the I-shaped iron core is provided with a plurality of pit slots; and a plurality of Hall element probes connected with the change-over switch are arranged on the sensor strip.
Preferably, the Hall element probes on the sensor strip are inserted and placed corresponding to the concave grooves on the I-shaped iron core, so that the I-shaped iron core can be conveniently replaced for comparison experiments.
Preferably, the movable base is also provided with a helical gear guide rail; the movable rod is provided with a knob; and the knob is provided with a helical gear shaft which is matched with the helical gear guide rail.
Preferably, the movable base and the movable rod are respectively provided with a graduated scale and a vernier.
Preferably, the measuring combination further comprises a constant current power supply and an ammeter which are respectively connected with the reversing switch blade, and a tesla meter connected with the change-over switch; the constant current power supply is connected with the ammeter.
The utility model has the beneficial effects that: the distance between the I-shaped iron core and the E-shaped iron core is accurately adjusted by utilizing the movable ruler assembly, so that the size of a parallel air gap between the I-shaped iron core and the E-shaped iron core is conveniently changed;
the direction and the magnitude of the current of the magnetizing coil are continuously controlled and changed by utilizing the reversing knife switch, and the I-shaped iron core and the E-shaped iron core are repeatedly magnetized, so that a symmetrical and stable hysteresis loop can be obtained;
by selecting one of the hall elements to be connected with the tesla meter by using the change-over switch, the magnetic induction intensity of different magnetic circuits can be measured.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
FIG. 2 is a block diagram of an experimental measurement set-up of the present utility model.
Fig. 3 is a partial side view of the core and sensor of the present utility model in use.
FIG. 4 is a schematic view of a partial structure of a sample holder according to the present utility model.
Fig. 5 is a schematic view of a partial structure of a knob according to the present utility model.
Fig. 6 is a schematic diagram of a magnetic circuit of a sample iron core of the present utility model.
Legend description: 1, moving a ruler assembly; 101, moving a base; 102 moving the rod; 103 dividing ruler; 104 vernier; 105 helical guide rails; 106, turning a knob; 107 helical gear shafts; 2, measuring combination; 3 a sample assembly; 301 sample holder; 302 magnetizing the coil; 303 sensor bars; 304I-shaped iron core; 305E-shaped iron core; 306 pit slots; 307 hall element probe; 4, reversing a knife switch; 5 tesla meter; 6, a constant current power supply; 7, an ammeter; 8 switching the switch.
Detailed Description
The utility model further provides an experimental device for measuring the DC magnetic circuit characteristics of the ferromagnetic material, which is described in the following with reference to the accompanying drawings.
Referring to fig. 1-5, an experimental device for measuring the characteristics of a direct current magnetic circuit of a ferromagnetic material is characterized by comprising a moving ruler assembly 1, a sample bracket 301 arranged on the moving ruler assembly 1 through screws, a sample assembly 3 arranged on the sample bracket 301, and a measuring combination 2 connected with the sample assembly 3; the mobile ruler assembly 1 comprises a mobile base 101 and a mobile rod 102 slidably mounted on the mobile base 101; the sample assembly 3 comprises an I-shaped iron core 304, an E-shaped iron core 305, a magnetizing coil 302 wound on the E-shaped iron core 305 and a sensor strip 303 which can be inserted and placed on the I-shaped iron core 304; the measuring combination 2 comprises a reversing blade 4 connected to a magnetizing coil 302 and a change-over switch 8 connected to a sensor strip 303; the distance between the I-shaped iron core 304 and the E-shaped iron core 305 is accurately adjusted by utilizing the movable ruler assembly 1, so that the size of the parallel air gap between the I-shaped iron core 304 and the E-shaped iron core 305 is convenient to change; the direction and the magnitude of the current of the magnetizing coil 302 are continuously controlled and changed by utilizing the reversing switch blade 4, and the I-shaped iron core 304 and the E-shaped iron core 305 are repeatedly magnetized, so that a symmetrical and stable hysteresis loop can be obtained; by selecting one of the hall element probes 307 to be connected to the tesla meter 405 by means of the change-over switch 8, the magnetic induction intensity of different magnetic circuits can be measured.
Referring to fig. 1-5, the I-shaped iron core 304 is provided with three pit slots 306; three hall element probes 307 connected with the change-over switch 8 are arranged on the sensor strip 303; the Hall element probes 307 on the sensor strip 303 are inserted and placed corresponding to the concave grooves 306 on the I-shaped iron core 304; through being connected with the sensor strip 303 change-over switch 8, change-over switch 8 is connected with teslameter 5, and one of them hall element probe 307 on the change-over switch 8 change-over sensor strip 303 inserts teslameter 5, measures the magnetic induction intensity in the different positions of the parallel clearance even magnetic field between I-shaped iron core 304 and E-shaped iron core 305 to be convenient for obtain magnetic material's direct current hysteresis loop and initial magnetization curve.
Referring to fig. 1-5, the movable base 101 is further provided with a helical gear guide 105; the movable rod 102 is provided with a knob 106; a helical gear shaft 107 meshed with the helical gear guide rail 105 is arranged on the knob 106; a graduated scale 103 and a vernier scale 104 are respectively arranged on the movable base 101 and the movable rod 102; the measuring combination 2 further comprises a constant current power supply 6 and an ammeter 7 which are respectively connected with the reversing switch blade 7, and a teslameter 5 connected with the change-over switch 8; the constant current power supply 6 is connected with the ammeter 7; through rotatory knob 106, knob 106 drives helical gear axle 107 and rotates, and helical gear axle 107 drives movable rod 102 along helical gear guide 105 and moves to be convenient for change I shape iron core 304 and E shape iron core 305 between parallel air gap size, through moving base 101 and movable rod 102 and installing scale 103 and vernier 104 respectively, improve the precision that movable rod 102 moved.
In the utility model, the E-shaped iron core 305 and the I-shaped iron core 304 are needed to be demagnetized before an experiment, a magnetizing coil 302 is wound on the E-shaped iron core 305, the I-shaped iron core 304 is installed on a sample bracket 301 through a screw, the opening direction of the E-shaped iron core 305 is opposite to the I-shaped iron core 304, a parallel air gap is formed between the E-shaped iron core 305 and the I-shaped iron core 304, a sensor strip 303 provided with a Hall element probe 307 is arranged on the I-shaped iron core 304, the Hall element probe 307 is inserted into a pit 306 arranged in the I-shaped iron core 304, a constant current power supply 6 applies constant direct current to the magnetizing coil 302, the E-shaped iron core 305 and the I-shaped iron core 304 are magnetized repeatedly by utilizing a reversing knife 4 to continuously maintain the magnitude and the direction of the current, and the Hall element probe 307 on one of the sensor strip 303 is switched with a teslameter 5 through a switch 8;
based on magnetic exercise of maximum value Im of magnetizing current, corresponding to each I k value of magnetizing current, magnetic induction intensity of middle part of parallel gap uniform magnetic field region is measured by tesla meter 5 to obtain DC hysteresis loop and initial magnetizing curve of the ferromagnetic material, and then the formula is passedCalculating the magnetic field strength, wherein N is the number of turns of the magnetizing coil, and the passing current is I,/or->For the average magnetic path length of the sample, H is given in A/m, and is also given by the formula +.> Calculating magnetomotive force;
by rotating the knob 106, the knob 106 drives the helical gear shaft 107 to rotate, the helical gear shaft 107 drives the moving rod 102 to move along the helical gear guide rail 105, and the size of a parallel air gap between the I-shaped iron core 304 and the E-shaped iron core 305 is accurately changed according to the graduated scale 103 and the vernier 104 arranged on the moving base 101 and the moving rod 102;
referring to fig. 6, the E-shaped iron core 305 and the I-shaped iron core 304 divide the magnetic circuit into three branches, two sections a and C can be regarded as being "parallel" to each other, and then "series" with section B, the magnetic resistance of the magnetic circuit can be measured, and the series and parallel magnetic resistances of the magnetic circuit can be connected to tesla meter 5 by using change-over switch 8, and the magnetic resistances of A, B, C magnetic circuit are measured by the formula magnetic resistance rm=l/μs, wherein l magnetic circuit length, magnetic permeability of μferromagnetic material, S magnetic circuit cross-section area, if magnetic permeability μ is large, magnetic resistance is small, the relationship is μ=b/H, B magnetic induction intensity, and H magnetic field intensity.
The above embodiments are illustrative of the present utility model, and not limiting, and any simple modifications of the present utility model fall within the scope of the present utility model.
Claims (6)
1. The experimental device for measuring the characteristics of the direct-current magnetic circuit of the ferromagnetic material is characterized by comprising a sample bracket (301) of a movable ruler assembly (1) arranged on the movable ruler assembly (1), a sample assembly (3) arranged on the sample bracket (301) and a measuring combination (2) connected with the sample assembly (3); the movable ruler assembly (1) comprises a movable base (101) and a movable rod (102) slidably mounted on the movable base (101); the sample assembly (3) comprises an I-shaped iron core (304), an E-shaped iron core (305), a magnetizing coil (302) wound on the E-shaped iron core (305) and a sensor strip (303) which can be inserted and placed on the I-shaped iron core (304); the measuring assembly (2) comprises a reversing blade (4) connected to a magnetizing coil (302) and a change-over switch (8) connected to a sensor strip (303).
2. The experimental device for measuring the characteristics of a direct current magnetic circuit of a ferromagnetic material according to claim 1, wherein: a plurality of pit slots (306) are formed in the I-shaped iron core (304); a plurality of Hall element probes (307) connected with the change-over switch (8) are arranged on the sensor strip (303).
3. The experimental apparatus for measuring the characteristics of a direct current magnetic circuit of a ferromagnetic material according to claim 2, wherein: the Hall element probe (307) on the sensor strip (303) is inserted and placed corresponding to the pit slot (306) on the I-shaped iron core (304).
4. The experimental apparatus for measuring the characteristics of a direct current magnetic circuit of a ferromagnetic material according to claim 1, wherein: the movable base (101) is also provided with a helical gear guide rail (105); the movable rod (102) is provided with a knob (106); and the knob (106) is provided with a helical gear shaft (107) which is matched with the helical gear guide rail (105).
5. The experimental apparatus for measuring the characteristics of a direct current magnetic circuit of a ferromagnetic material according to claim 4, wherein: and a graduated scale (103) and a vernier (104) are respectively arranged on the movable base (101) and the movable rod (102).
6. The experimental apparatus for measuring the characteristics of a direct current magnetic circuit of a ferromagnetic material according to claim 1, wherein: the measuring combination (2) further comprises a constant current power supply (6) and an ammeter (7) which are respectively connected with the reversing switch blade (4), and a teslameter (5) connected with the change-over switch (8); the constant current power supply (6) is connected with the ammeter (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320922868.1U CN219936082U (en) | 2023-04-23 | 2023-04-23 | Experimental device for measuring direct-current magnetic circuit characteristics of ferromagnetic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320922868.1U CN219936082U (en) | 2023-04-23 | 2023-04-23 | Experimental device for measuring direct-current magnetic circuit characteristics of ferromagnetic material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219936082U true CN219936082U (en) | 2023-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320922868.1U Active CN219936082U (en) | 2023-04-23 | 2023-04-23 | Experimental device for measuring direct-current magnetic circuit characteristics of ferromagnetic material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219936082U (en) |
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2023
- 2023-04-23 CN CN202320922868.1U patent/CN219936082U/en active Active
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