CN107622722A - A kind of motional electromotive force demonstrator - Google Patents
A kind of motional electromotive force demonstrator Download PDFInfo
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- CN107622722A CN107622722A CN201710879008.3A CN201710879008A CN107622722A CN 107622722 A CN107622722 A CN 107622722A CN 201710879008 A CN201710879008 A CN 201710879008A CN 107622722 A CN107622722 A CN 107622722A
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- fixed
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- electromotive force
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- runner
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Abstract
The invention discloses a kind of motional electromotive force demonstrator, including bottom plate, it is characterized in that：The bottom plate upper end is fixed with support bar, motor is fixed with the support bar, the motor output shaft is fixedly connected with runner, the runner is provided 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 the latter half is fixed with one group of stub, the projection of the movable plate is in the chute 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 present invention relates to physics teaching field, specifically, is related to a kind of motional electromotive force demonstrator.
Background technology
Conductor is moved with the direction perpendicular to magnetic induction line in magnetic field, at the same time perpendicular to magnetic field and the both ends of the direction of motion
Caused electromotive force, referred to as motional electromotive force.The physics facility function of being presently used for motional electromotive force demonstration is all very simple
It is single, typically it is put into using a rectangular wire frame in high-intensity magnetic field, one end connection voltmeter of rectangular wire frame, the other end of rectangular wire frame
To may move side, motor driven may move side uniform motion, magnetic flux change in rectangular wire frame, then can produce induced electromotive force,
Voltmeter produces numerical value, and this kind of experimental provision simply can test whether that electromotive force can be produced, still, can not measurement experiment dress
When the condition put changes, there is which kind of influence to caused electromotive force.This is the deficiencies in the prior art part.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of motional electromotive force demonstrator, student is facilitated to be easy to learn and manage
Solve the physical phenomenon of motional electromotive force.
The present invention, which adopts the following technical scheme that, 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 bar, described
Motor is fixed with support bar, the motor output shaft is fixedly connected with runner, and the runner is provided 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 dynamic plate, the movable plate the latter half is fixed with one group of stub, and the projection of the movable plate is embedded in the chute 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 is bolted on the movable plate.
Compared with prior art, the advantages and positive effects of the present invention are：This device is placed in the horizontal plane, by two
One end of connecting rod by bolted splice on the circular hole of the outmost turns of runner, by the same opening position in two U-shaped magnets
The both ends of some stub connect upper voltmeter by wire, form closed-loop path, start motor, and motor driven runner does circle
Zhou Yundong, driven by rotating wheel link motion, movable plate motion being driven, movable plate drives stub to be moved in the magnetic field of U-shaped magnet,
Cutting magnetic induction line, according to Faraday's electromagnetic induction law, because magnetic flux change produces induced electromotive force, a part for closed circuit
When conductor does the motion of cutting magnetic induction line in magnetic field, electric current will be produced in conductor, this phenomenon is caused electromagnetic induction
Electric current is referred to as induced-current.The both sides of stub produce induced electromotive force, and voltmeter shows the size of induced electromotive force, can be with
The numerical value of two voltmeters is compared, sees whether caused electromotive force is identical, is then replaced by one of them U-shaped magnet
The stub of other positions is connected with voltmeter, repeats above-mentioned motion process again, and the numerical value change of two voltmeters of observation is
It is no identical, so as to judge whether induced electromotive force is identical caused by the stub at diverse location.By the one of two connecting rods
End is hinged with the circular hole of the innermost circle of runner or the circular hole in centre position, and motor rotates, and repeats above-mentioned experimentation, observation two
The change of the induced electromotive force of individual voltmeter measurement.By constantly changing experiment condition, so as to during the change of observation experiment condition pairs
The influence of caused induced electromotive force, contribute to the rational learning of student.
Brief description of the drawings
Fig. 1 is the stereogram one of the present invention.
Fig. 2 is the stereogram one of the present invention.
Fig. 3 is the front view of the present invention.
Fig. 4 is the side view of the present invention.
Fig. 5 is the top view of the present invention.
In figure：1st, bolt, 2, bottom plate, 3, U-shaped board, 4, stub, 5, chute, 6, fixed plate, 7, motor, 8, runner, 9,
Connecting rod, 10, movable plate, 11, support bar, 12, circular hole.
Embodiment
Below in conjunction with the accompanying drawings, the specific embodiment of the present invention is described in detail, it is to be understood that of the invention
Protection domain do not limited by embodiment.
As Figure 1-Figure 5, the present invention includes bottom plate 2, and the upper end of bottom plate 2 is fixed with support bar 11, the support bar
It is fixed with motor 7 on 11, the output shaft of motor 7 is fixedly connected with runner 8, and the runner 8 is provided with one group of circular hole 12, described turn
Wheel 8 by one end of symmetrical two connecting rods 9 of bolted splice in the circular hole 12, distinguish by the other end of each connecting rod 9
It is hinged on movable plate 10, the latter half of movable plate 10 is fixed with one group of stub 4, and the projection of the movable plate 10 is embedded in
In the chute 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 the bottom
On 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 movable plate
On 10.
The present invention workflow be：This device is placed in the horizontal plane, one end of two connecting rods 9 is passed through into bolt 1
It is hinged on the circular hole 12 of the outmost turns of runner 8, by some stub 4 of the same opening position in two U-shaped magnets 3
Both ends connect upper voltmeter by wire, form closed-loop path, start motor 7, and motor 7 drives runner 8 to move in a circle, runner
8 drivening rods 9 move, and drive movable plate 10 to move, and movable plate 10 drives stub 4 to be moved in the magnetic field of U-shaped magnet 3, root
According to Faraday's electromagnetic induction law, because magnetic flux change produces induced electromotive force, a part of conductor of closed circuit is in magnetic field
When doing the motion of cutting magnetic induction line, electric current will be produced in conductor, electromagnetic induction, caused electric current is referred to as sensing this phenomenon
Electric current.The both sides of stub 4 produce induced electromotive force, and voltmeter shows the size of induced electromotive force, can be to two voltages
The numerical value of table is compared, and sees whether caused electromotive force is identical, is then replaced by other positions in one of them U-shaped magnet 3
Stub 4 be connected with voltmeter, repeat above-mentioned motion process again, whether observe the numerical value change of two voltmeters identical,
So as to judge whether induced electromotive force caused by the stub 4 at diverse location is identical.By one end of two connecting rods 9 with turning
The circular hole 12 of the innermost circle of wheel 8 or the circular hole 12 in centre position are be hinged, and motor 7 rotates, and repeat above-mentioned experimentation, observation two
The change of the induced electromotive force of individual voltmeter measurement.By constantly changing experiment condition, so as to during the change of observation experiment condition pairs
The influence of caused induced electromotive force, facilitates Students ' Learning.
Disclosed above is only the specific embodiment of the present invention, and still, the present invention is not limited to this, any ability
What the technical staff in domain can think change should all fall into protection scope of the present invention.
Claims (2)
1. a kind of motional electromotive force demonstrator, including bottom plate (2), it is characterized in that：Bottom plate (2) upper end is fixed with support bar
(11) motor (7), is fixed with the support bar (11), motor (7) output shaft is fixedly connected with runner (8), the runner
(8) one group of circular hole (12) is provided with, 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) the latter half
One group of stub (4) is fixed with, the projection of the movable plate (10) is in the chute (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 |
|---|---|---|---|
| CN201710879008.3A CN107622722A (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 |
|---|---|---|---|
| CN201710879008.3A CN107622722A (en) | 2017-09-26 | 2017-09-26 | A kind of motional electromotive force demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107622722A true CN107622722A (en) | 2018-01-23 |
Family
ID=61090642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710879008.3A Pending CN107622722A (en) | 2017-09-26 | 2017-09-26 | A kind of motional electromotive force demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107622722A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109448518A (en) * | 2018-12-28 | 2019-03-08 | 汪少斌 | A kind of electromagnetic induction phenomenon apparatus for demonstrating |
-
2017
- 2017-09-26 CN CN201710879008.3A patent/CN107622722A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109448518A (en) * | 2018-12-28 | 2019-03-08 | 汪少斌 | A kind of electromagnetic induction phenomenon apparatus for demonstrating |
| CN109448518B (en) * | 2018-12-28 | 2019-08-30 | 汪少斌 | A kind of electromagnetic induction phenomenon apparatus for demonstrating |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180123 |
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| WD01 | Invention patent application deemed withdrawn after publication |