CN208208148U - A kind of motional electromotive force demonstrator - Google Patents
A kind of motional electromotive force demonstrator Download PDFInfo
- Publication number
- CN208208148U CN208208148U CN201721237673.4U CN201721237673U CN208208148U CN 208208148 U CN208208148 U CN 208208148U CN 201721237673 U CN201721237673 U CN 201721237673U CN 208208148 U CN208208148 U CN 208208148U
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- fixed
- plate
- electromotive force
- runner
- stub
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Abstract
The utility model discloses a kind of motional electromotive force demonstrators, including bottom plate, it is characterized in that: the bottom plate upper end is fixed with support rod, motor is fixed on the support rod, the motor output shaft is fixedly connected with runner, the runner is equipped with one group of circular hole, the runner is by one end of symmetrical two connecting rods of bolted splice in the circular hole, the other end of each connecting rod is respectively hinged on movable plate, the movable plate lower half portion is fixed with one group of stub, the pillar of the movable plate is in the sliding slot of fixed plate, the fixed plate is fixed on the protruding plate of U-shaped magnet, the U-shaped magnet is fixed on the bottom plate, the stub is located in the U-shaped magnet.
Description
Technical field
The utility model relates to physics teaching fields, in particular, being related to a kind of motional electromotive force demonstrator.
Background technique
Conductor is moved in magnetic field with the direction perpendicular to magnetic induction line, at the same time perpendicular to the both ends in magnetic field and the direction of motion
The electromotive force of generation, referred to as motional electromotive force.Currently, the physics facility function for motional electromotive force demonstration is all very simple
It is single, it is generally put into high-intensity magnetic field using a rectangular wire frame, one end of rectangular wire frame connects voltmeter, the other end of rectangular wire frame
To move side, motor drives removable side uniform motion, and magnetic flux change in rectangular wire frame can then generate induced electromotive force,
Voltmeter generates numerical value, this kind of experimental provision only can test whether that electromotive force can be generated, and still, is unable to measure experiment dress
When the condition set changes, there is which kind of influence to the electromotive force of generation.This is in place of the deficiencies in the prior art.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of motional electromotive force demonstrators, facilitate student convenient for study
With the physical phenomenon for understanding motional electromotive force.
The utility model adopts the following technical solution realizes goal of the invention:
A kind of motional electromotive force demonstrator, including bottom plate, it is characterized in that: the bottom plate upper end is fixed with support rod, it is described
Motor is fixed on support rod, the motor output shaft is fixedly connected with runner, and the runner is equipped with one group of circular hole, the runner
By one end of symmetrical two connecting rods of bolted splice in the circular hole, the other end of each connecting rod is respectively hinged at shifting
On movable plate, the movable plate lower half portion is fixed with one group of stub, and the pillar of the movable plate is embedded in the sliding slot of fixed plate,
The fixed plate is fixed on the protruding plate of U-shaped magnet, and the U-shaped magnet is fixed on the bottom plate, and the stub is located at
In the U-shaped magnet.
Each stub has bolt to be fixed on the movable plate.
It compared with prior art, will the advantages and positive effects of the utility model are as follows: this device is placed in the horizontal plane
One end of two connecting rods passes through bolted splice on the circular hole of the outmost turns of runner, by two U-shaped intracorporal same positions of magnetic
The both ends of some stub at place connect upper voltmeter by conducting wire, constitute closed circuit, start motor, and motor drives runner
It moves in a circle, driven by rotating wheel link motion drives movable plate movement, and movable plate drives stub in the magnetic field of U-shaped magnet
Movement, cutting magnetic induction line, according to Faraday's electromagnetic induction law, because magnetic flux change generates induced electromotive force, closed circuit
When a part of conductor does the movement of cutting magnetic induction line in magnetic field, electric current will be generated in conductor, this phenomenon electromagnetic induction,
The electric current of generation is known as induced current.The two sides of stub generate induced electromotive force, and voltmeter shows the big of induced electromotive force
It is small, the numerical value of two voltmeters can be compared, see whether the electromotive force of generation is identical, then one of them U-shaped magnet
The stub for being inside changed to other positions is connect with voltmeter, repeats above-mentioned motion process again, observes the number of two voltmeters
Whether value variation is identical, and whether the induced electromotive force so as to judge the stub generation at different location is identical.By two
The circular hole of the innermost circle of one end and runner of connecting rod or the circular hole in middle position are hinged, and motor rotation repeats above-mentioned tested
Journey observes the variation of the induced electromotive force of two voltmeters measurement.By constantly changing experiment condition, thus observation experiment condition
To the influence of the induced electromotive force of generation when variation, facilitate the rational learning of student.
Detailed description of the invention
Fig. 1 is the perspective view one of the utility model.
Fig. 2 is the perspective view two of the utility model.
Fig. 3 is the main view of the utility model.
Fig. 4 is the side view of the utility model.
Fig. 5 is the top view of the utility model.
In figure: 1, bolt, 2, bottom plate, 3, U-shaped board, 4, stub, 5, sliding slot, 6, fixed plate, 7, motor, 8, runner, 9,
Connecting rod, 10, movable plate, 11, support rod, 12, circular hole.
Specific embodiment
With reference to the accompanying drawing, a specific embodiment of the utility model is described in detail, it is to be understood that this
The protection scope of utility model is not limited by the specific implementation.
As Figure 1-Figure 5, the utility model includes bottom plate 2, and 2 upper end of bottom plate is fixed with support rod 11, the branch
Motor 7 is fixed on strut 11,7 output shaft of motor is fixedly connected with runner 8, and the runner 8 is equipped with one group of circular hole 12, institute
Runner 8 is stated by one end of symmetrical two connecting rods 9 of bolted splice in the circular hole 12, the other end of each connecting rod 9
It is respectively hinged on movable plate 10,10 lower half portion of movable plate is fixed with one group of stub 4, the pillar of the movable plate 10
In the sliding slot 5 of fixed plate 6, the fixed plate 6 is fixed on the protruding plate of U-shaped magnet 3, and the U-shaped magnet 3 is fixed on institute
It states on bottom plate 2, the stub 4 is located in the U-shaped magnet 3, and each stub 4 has bolt 1 to be fixed on the shifting
On movable plate 10.
The workflow of the utility model are as follows: this device is placed in the horizontal plane, one end of two connecting rods 9 is passed through into spiral shell
Bolt 1 is hinged on the circular hole 12 of the outmost turns of runner 8, by some stub at the same position in two U-shaped magnets 3
4 both ends connect upper voltmeter by conducting wire, constitute closed circuit, start motor 7, and motor 7 drives runner 8 to move in a circle,
Runner 8 drives connecting rod 9 to move, and movable plate 10 is driven to move, and movable plate 10 drives stub 4 to transport in the magnetic field of U-shaped magnet 3
Dynamic, according to Faraday's electromagnetic induction law, because magnetic flux change generates induced electromotive force, a part of conductor of closed circuit is in magnetic
When doing the movement of cutting magnetic induction line in, electric current will be generated in conductor, this phenomenon is known as electromagnetic induction, the electric current of generation
Induced current.The two sides of stub 4 generate induced electromotive force, and voltmeter shows the size of induced electromotive force, can be to two
The numerical value of voltmeter is compared, and sees whether the electromotive force of generation is identical, is then changed in one of them U-shaped magnet 3 other
The stub 4 of position is connect with voltmeter, repeats above-mentioned motion process again, observe two voltmeters numerical value change whether phase
Together, whether identical so as to the induced electromotive force that judges that stub 4 at different location generates.By one end of two connecting rods 9
Hinged with the circular hole 12 of the innermost circle of runner 8 or the circular hole 12 in middle position, motor 7 rotates, and repeats above-mentioned experimentation, sees
Examine the variation of the induced electromotive force of two voltmeters measurement.By constantly changing experiment condition, so that observation experiment condition changes
When influence to the induced electromotive force of generation, facilitate student to learn.
Disclosed above is only a specific embodiment of the utility model, and still, the utility model is not limited to this,
The changes that any person skilled in the art can think of should all fall into the protection scope of the utility model.
Claims (2)
1. a kind of motional electromotive force demonstrator, including bottom plate (2), it is characterized in that: the bottom plate (2) upper end is fixed with support rod
(11), it is fixed with motor (7) on the support rod (11), motor (7) output shaft is fixedly connected with runner (8), the runner
(8) it is equipped with one group of circular hole (12), the runner (8) is by one end of symmetrical two connecting rods (9) of bolted splice in the circle
In hole (12), the other end of each connecting rod (9) is respectively hinged on movable plate (10), movable plate (10) lower half portion
It is fixed with one group of stub (4), the pillar of the movable plate (10) is in the sliding slot (5) of fixed plate (6), the fixed plate
(6) it is fixed on the protruding plate of U-shaped magnet (3), the U-shaped magnet (3) is fixed on the bottom plate (2), the stub (4)
In the U-shaped magnet (3).
2. motional electromotive force demonstrator according to claim 1, it is characterized in that: each stub (4) passes through spiral shell
Bolt (1) is fixed on the movable plate (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721237673.4U CN208208148U (en) | 2017-09-26 | 2017-09-26 | A kind of motional electromotive force demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721237673.4U CN208208148U (en) | 2017-09-26 | 2017-09-26 | A kind of motional electromotive force demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208208148U true CN208208148U (en) | 2018-12-07 |
Family
ID=64489439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721237673.4U Expired - Fee Related CN208208148U (en) | 2017-09-26 | 2017-09-26 | A kind of motional electromotive force demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208208148U (en) |
-
2017
- 2017-09-26 CN CN201721237673.4U patent/CN208208148U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181207 Termination date: 20190926 |