CN217718887U - Integrated ampere force quantitative demonstrator - Google Patents
Integrated ampere force quantitative demonstrator Download PDFInfo
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- CN217718887U CN217718887U CN202221256304.0U CN202221256304U CN217718887U CN 217718887 U CN217718887 U CN 217718887U CN 202221256304 U CN202221256304 U CN 202221256304U CN 217718887 U CN217718887 U CN 217718887U
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Abstract
The utility model discloses an integration ampere force ration demonstration ware, include: a switching power supply; the bracket is vertically arranged on the shell of the switching power supply; the magnet fixing frame is rotatably arranged on the bracket; the first electromagnet and the second electromagnet are arranged on the magnet fixing frame and are connected in series and electrically connected with the exciting current wiring terminal; the two support rods are electrically connected with the current binding post; the metal conductor rod is placed between the other ends of the two support rods; the digital dynamometer is fixedly arranged on the bracket; and one end of the force measuring rod is connected to the metal conductor rod, and the other end of the force measuring rod is connected with the digital dynamometer. The demonstrator is convenient to move and simple to operate, can change the magnetic induction intensity of the area where the electrified conductor is located by changing the exciting current, can accurately calculate the magnetic induction intensity of different exciting currents, can rotate the ampere force when the magnetic level changes the included angle between the magnetic field and the electrified conductor, and can demonstrate the ampere force when the magnetic field is parallel to the electrified conductor.
Description
Technical Field
The utility model relates to a teaching equipment technical field especially relates to an integration ampere force ration demonstration ware.
Background
The existing ampere force demonstrator has the following types: the first one is that the circuit composed of square wire frame, hoof-shaped magnet, battery, switch slide rheostat and ammeter qualitatively demonstrates the magnitude and direction of ampere force; the second type is a semi-quantitative ampere force demonstrator which is composed of three horseshoe magnets, a conductor, a pointer and a dial and can demonstrate that when the effective length of the conductor in a magnetic field is multiplied, the scale indicated by the pointer is multiplied, namely, the ampere force is multiplied; the third is that a spring balance and an iron stand are added on the basis of the first, so that the relationship between the ampere force and the magnetic induction intensity, the current intensity in the conductor and the effective length of the conductor in a magnetic field can be quantitatively analyzed; the fourth is that after improvement, the magnetic induction intensity can be changed, and the relationship between the ampere force and the magnetic induction intensity can also be reflected.
The magnetic induction intensity of the first three demonstrator can not be changed, the magnetic induction intensity of the fourth demonstrator can be changed, but the relation between the ampere force and the magnetic induction intensity is only qualitatively counted, and the demonstration needs more equipment and is lack of visibility, so that the demonstration is not beneficial to being used in the effective time of a classroom.
SUMMERY OF THE UTILITY MODEL
The utility model provides an integration ampere force ration demonstration ware to solve above-mentioned technical problem, and reach the purpose that obtains controllable equal high-intensity magnetic field.
The utility model adopts the technical proposal that: an integrated ampere force quantification demonstrator is provided, which comprises:
the switch power supply is provided with an exciting current adjusting knob, an exciting current meter, an exciting current reversing switch, a conductor current adjusting knob, a conductor current reversing switch, a conductor current meter, an exciting current binding post and a current binding post;
the bracket is vertically arranged on the shell of the switching power supply;
the magnet fixing frame is rotatably arranged on the bracket;
the first electromagnet and the second electromagnet are correspondingly and mutually parallel arranged on the magnet fixing frame, and are connected in series and electrically connected with the exciting current binding post;
the two support rods are provided, one ends of the two support rods are fixedly arranged on the support, the support rods are positioned between the first electromagnet and the second electromagnet, and the two support rods are electrically connected with the current wiring terminal;
the metal conductor rod is placed between the other ends of the two support rods;
the digital dynamometer is fixedly arranged on the bracket; and
and one end of the force measuring rod is connected to the metal conductor rod, and the other end of the force measuring rod is connected with the digital dynamometer.
Furthermore, the digital dynamometer and the metal conductor rod are positioned on different sides of the support, and a through hole for the force measuring rod to pass through is formed in the support.
Furthermore, the magnet fixing frame is of a Contraband-shaped structure, the magnet fixing frame is connected with the support through a rotary connecting piece, the rotary connecting piece is composed of a sleeve and nuts in threaded connection with the two ends of the sleeve, the sleeve is located in the through hole, and the two nuts are arranged on the two sides of the magnet fixing frame and the two sides of the support.
Furthermore, a connecting plate is arranged at one end of the supporting rod, a threaded hole is formed in the connecting plate, and the connecting plate is fixed on the support through a screw.
Further, branch one end is provided with dodges the groove, and dodges on two spinal branch poles and set up relatively in the groove to the realization dodges for the magnet mount.
Furthermore, when the magnet fixing frame rotates, the rotary connecting piece and the magnet fixing frame rotate together, an angle indicating disc is further mounted on the support above the through hole, and a pointer is arranged on a nut close to the angle indicating disc.
Furthermore, the angle indicating disc is annular and is sleeved outside the rotary connecting piece.
Furthermore, the other end of the supporting rod is provided with an arc groove, one side of the arc groove is fixedly provided with an elastic copper pressing sheet, and the arc groove and the elastic copper pressing sheet are used for limiting the end part of the metal conductor rod.
Furthermore, one end of the force measuring rod is fixed with the metal conductor rod through an elastic insulation sheet.
The utility model has the advantages that: the utility model discloses an integrated device, be convenient for remove, few equipment, and easy operation, it is visual good, can change electric current in the conductor, can change conductor effective length, thereby can change exciting current and change the regional magnetic induction intensity in circular telegram conductor place to can calculate different exciting current's magnetic induction intensity more accurately, can demonstrate the ampere force when rotatory magnetic level changes the contained angle between magnetic field and circular telegram conductor, can demonstrate the ampere force when magnetic field is parallel with the circular telegram conductor.
Drawings
Fig. 1 is a schematic structural view of an integrated ampere force quantitative demonstrator disclosed by the utility model;
fig. 2 is a schematic structural view of the rotary connector disclosed in the present invention;
fig. 3 is a schematic structural view of a first support rod disclosed in the present invention;
fig. 4 is a schematic structural view of a second strut disclosed in the present invention;
fig. 5 is a schematic view of the connection between the force measuring rod and the metal conductor rod disclosed in the present invention;
fig. 6 is a parameter diagram between the first electromagnet and the second electromagnet disclosed in the present invention.
Reference numerals: 1. a first electromagnet; 2. a second electromagnet; 3. a digital dynamometer; 4. a magnet fixing frame; 5. a strut; 51. a connecting plate; 52. an avoidance groove; 6. a metal conductor bar; 7. an exciting current wiring terminal; 8. A power supply indication key; 9. a power switch; 10. an excitation current adjusting knob; 11. an excitation ammeter; 12. an exciting current reversing switch; 13. conductor current regulation is performed; 14. a conductor current reversing switch; 15. a conductor ammeter; 16. a current terminal; 17. a support; 18. a force measuring rod; 19. a rotating connector; 20. an angle indicating dial; 21. elastic copper pressing sheets; 22. an arc groove; 23. an elastic insulation sheet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, but the embodiments of the present invention are not limited thereto.
Example 1:
referring to fig. 1, the present embodiment discloses an integrated ampere force quantitative demonstrator, which includes: the switch power supply is provided with a power supply indicator key 8, a power supply switch 9, an excitation current adjusting knob 10, an excitation ammeter 11, an excitation current reversing switch 12, a conductor current adjusting knob 13, a conductor current reversing switch 14, a conductor ammeter 15, an excitation current binding post 7 and a current binding post 16; a bracket 17 vertically mounted on a housing of the switching power supply; the magnet fixing frame 4 is rotatably arranged on the bracket 17; the first electromagnet 1 and the second electromagnet 2 are correspondingly and mutually parallel arranged on the magnet fixing frame 4, and the first electromagnet 1 and the second electromagnet 2 are connected in series and are electrically connected with an excitation current binding post 7; the two support rods 5 are provided, one ends of the two support rods 5 are fixedly arranged on the bracket 17, the support rods 5 are positioned between the first electromagnet 1 and the second electromagnet 2, and the two support rods 5 are electrically connected with the current wiring terminal 16; a metal conductor bar 6 placed between the other ends of the two support bars 5; a digital dynamometer 3 fixedly mounted on the support 17; and a force measuring bar 18, one end of which is connected to the metal conductor bar 6 and the other end of which is connected to the digital dynamometer 3.
Specifically, the switching power supply in this embodiment is an existing mature product, and the switching power supply adopts a high-power 750W/24V/31A direct-current voltage stabilization mode of taiwan bright weft switching power supply RSP-750-24, so that the embodiment of the internal structure thereof is not described again.
As shown in fig. 1, the digital dynamometer 3 and the metal conductor bar 6 are located on different sides of the support 17, and the support 17 is provided with a through hole through which the force measuring bar 18 passes. The magnet fixing frame 4 is of a Contraband-shaped structure, the magnet fixing frame 4 is connected with the support 17 through a rotary connecting piece 19, referring to fig. 2, the rotary connecting piece 19 is composed of a sleeve and nuts in threaded connection with two ends of the sleeve, the sleeve is located in the through hole, the two nuts are located on two sides of the magnet fixing frame 4 and the support 17, and the magnet fixing frame 4 can rotate around the rotary connecting piece 19.
Two types of struts 5 are designed in the embodiment, and the structure of the first type of strut 5 is as follows:
as shown in fig. 1 and 3, a connecting plate 51 is disposed at one end of the support rod 5, a threaded hole is disposed in the connecting plate 51, and the connecting plate 51 is fixed to the bracket 17 by a screw. When magnet mount 4 rotated, swivel connected coupler 19 rotated with magnet mount 4 jointly, was located still install angle indicator 20 on the support 17 of through-hole top, angle indicator 20 is the preferred ring form, overlaps and establishes the outside at swivel connected coupler 19, is close to be provided with the pointer on the nut of angle indicator 20 to can read out turned angle when rotating magnet mount 4.
In the first structure of the supporting rod 5, the magnet fixing frame 4 is not interfered by the supporting rod 5 when rotating at a certain angle due to the existence of the connecting plate 51. However, the magnet holder 4 cannot be rotated by 90 degrees, and therefore, the second support rod 5 is designed.
The second strut 5 has the following structure:
referring to fig. 4, an avoiding groove 52 is formed at one end of each of the support rods 5, and the avoiding grooves 52 on the two support rods 5 are arranged oppositely, that is, one avoiding groove 52 is vertically upward, and the other avoiding groove 52 is vertically upward and downward, so as to realize avoiding for the magnet fixing frame 4.
The second pole support 5 design makes the magnet fixing frame 4 not interfered by the pole support 5 when rotating to 90 degrees, thereby satisfying the phenomenon that the magnetic induction line is horizontal to the metal conductor bar 6.
The other end (i.e. the left end in fig. 3 and 4) of the two support rods 5 is provided with an arc groove 22, an elastic copper pressing sheet 21 is fixed on one side of the arc groove 22, and the arc groove 22 and the elastic copper pressing sheet 21 are used for limiting the end of the metal conductor rod 6.
One end of the force measuring rod 18 is fixed with the metal conductor rod 6 through an elastic insulation sheet 23.
The principle of the utility model is as follows:
the first electromagnet 1, the second electromagnet 2 and the metal conductor bar 6 are electrified, the magnetic field acts on the current, the exciting current value is read from the exciting current meter 11, and the magnetic induction B can be obtained by the given formula
The calculated current I in the metal conductor bar 6 can be read from the conductor current meter 15, the effective length L of the metal conductor bar 6 can be directly measured, and the ampere force F exerted on the metal conductor bar 6 can be read from the digital dynamometer 3. It can be concluded that F = BIL when the magnetic field direction is perpendicular to the current; rotating the electromagnet fixing frame 4, and changing the angle theta between the magnetic field and the current to obtain F = BILsin theta; when the magnetic field is parallel to the current, the digital dynamometer 3 indicates zero; the digital dynamometer 3 can be observed for a reading by adjusting the excitation current adjustment knob 10 and the conductor current adjustment knob 13 while increasing or decreasing the excitation current and the current in the conductorWhether the variation satisfies F = BIL or F = BILsin theta; the current in the conductor can be reduced or increased when the excitation current is increased or decreased, and it is observed whether the change in the digital dynamometer indication satisfies F = BIL or F = BILsin θ.
The using method comprises the following steps:
1. before the power is switched on, the exciting current adjusting knob 10 and the conductor current adjusting knob 13 are rotated counterclockwise to make the current indicating number zero.
2. The power switch 9 is switched on, the exciting current adjusting knob 10 is rotated clockwise, the exciting current meter 11 is enabled to be a certain value I, and the magnetic induction B between two opposite electromagnets can be used
And (4) calculating. Where N denotes the number of turns of the coil, S denotes the cross-sectional area of the core in the coil, I denotes the current in the coil, L denotes the length of the soft magnetic substance in the electromagnet, L = L1+L2+L3+L4+L5As shown in FIG. 6, L represents the length between two magnetic poles, S represents the loading area between two magnetic poles in the direction perpendicular to the magnetic field, S is slightly larger than S, μ represents the absolute permeability of the magnetic medium, μ0Indicating the absolute permeability in vacuum. B = κ I may also be used, and κ is a parameter given in designing and manufacturing.
3. Rotating the conductor current adjusting screw 13 clockwise adjusts the current in the conductor, the magnitude of the ampere force can be obtained by F = BIL, and the result can be obtained by comparing with the digital dynamometer 3.
4. And changing the effective length of the conductor and carrying out experimental verification.
5. The current in the conductor was varied and experimental verification was performed.
6. And changing the current of the electromagnet, namely changing the magnetic induction intensity, and carrying out experimental verification.
7. When the exciting current and the current in the conductor are kept unchanged, the electromagnet fixing frame 4 is rotated, the angle between the magnetic field and the conductor is changed, experimental verification is carried out, and the angle size can be read from the angle indicating disc 20.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (9)
1. An integrated amperometric force quantification demonstrator, comprising:
the switch power supply is provided with an exciting current adjusting knob, an exciting current meter, an exciting current reversing switch, a conductor current adjusting knob, a conductor current reversing switch, a conductor current meter, an exciting current binding post and a current binding post;
the bracket is vertically arranged on the shell of the switching power supply;
the magnet fixing frame is rotatably arranged on the bracket;
the first electromagnet and the second electromagnet are correspondingly and mutually parallel arranged on the magnet fixing frame, and are connected in series and electrically connected with the exciting current binding post;
the two support rods are provided, one ends of the two support rods are fixedly arranged on the bracket, the support rods are positioned between the first electromagnet and the second electromagnet, and the two support rods are electrically connected with the current wiring terminal;
the metal conductor rod is placed between the other ends of the two support rods;
the digital dynamometer is fixedly arranged on the bracket; and
and one end of the force measuring rod is connected to the metal conductor rod, and the other end of the force measuring rod is connected with the digital dynamometer.
2. The integrated ampere-force quantitative demonstrator according to claim 1, wherein said digital dynamometer and a metal conductor bar are positioned on different sides of said support, and a through hole for said dynamometer bar to pass through is formed on said support.
3. The integrated ampere-force quantitative demonstrator according to claim 2, wherein said magnet holder is Contraband-shaped, and is connected to said support through a rotary connector, said rotary connector is composed of a sleeve and nuts screwed to two ends of said sleeve, said sleeve is located in said through hole, and two nuts are disposed on two sides of said magnet holder and support.
4. The integrated ampere-force quantitative demonstrator according to claim 3, wherein one end of the supporting rod is provided with a connecting plate, the connecting plate is provided with a threaded hole, and the connecting plate is fixed on the bracket through a screw.
5. The integrated ampere-force quantitative demonstrator according to claim 3, wherein one end of each of the support rods is provided with an avoidance groove, and the avoidance grooves on the two support rods are oppositely arranged so as to realize avoidance for the magnet fixing frame.
6. The integrated ampere-force quantitative demonstrator according to claim 4 or 5, wherein when the magnet holder rotates, the rotary connector and the magnet holder rotate together, the bracket above the through hole is further provided with an angle indicating disc, and a nut close to the angle indicating disc is provided with a pointer.
7. The integrated ampere-force quantitative demonstrator according to claim 6, wherein said angle indicator disk is annular and is sleeved outside said rotary connector.
8. The integrated ampere-force quantitative demonstrator according to claim 4 or 5, wherein an arc groove is formed at the other end of the supporting rod, an elastic copper pressing sheet is fixed on one side of the arc groove, and the arc groove and the elastic copper pressing sheet are used for limiting the end of the metal conductor rod.
9. The integrated ampere-force quantitative demonstrator of claim 1, wherein one end of said force-measuring bar is fixed to said metal conductor bar by an elastic insulation sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221256304.0U CN217718887U (en) | 2022-05-24 | 2022-05-24 | Integrated ampere force quantitative demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221256304.0U CN217718887U (en) | 2022-05-24 | 2022-05-24 | Integrated ampere force quantitative demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217718887U true CN217718887U (en) | 2022-11-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221256304.0U Active CN217718887U (en) | 2022-05-24 | 2022-05-24 | Integrated ampere force quantitative demonstrator |
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| Country | Link |
|---|---|
| CN (1) | CN217718887U (en) |
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2022
- 2022-05-24 CN CN202221256304.0U patent/CN217718887U/en active Active
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