CN204833857U - Self inductance presentation device - Google Patents
Self inductance presentation device Download PDFInfo
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- CN204833857U CN204833857U CN201520569687.0U CN201520569687U CN204833857U CN 204833857 U CN204833857 U CN 204833857U CN 201520569687 U CN201520569687 U CN 201520569687U CN 204833857 U CN204833857 U CN 204833857U
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- emitting diode
- light emitting
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- bulb
- display circuit
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Abstract
The utility model discloses a self inductance presentation device, by self -induction coil, an emitting diode, the 2nd emitting diode, the 3rd emitting diode, fourth emitting diode, current -limiting resistor, first bulb, the second bulb, power and control switch constitute, an emitting diode and the parallelly connected back of the 2nd emitting diode and self -induction coil and the first display circuit of bulb series one -tenth, an emitting diode and the 2nd emitting diode opposite direction, the 3rd emitting diode and the parallelly connected back of fourth emitting diode and current -limiting resistor and the 2nd bulb series one -tenth second display circuit, the 3rd emitting diode and fourth emitting diode opposite direction, first display circuit and the parallelly connected back of second display circuit and power and control switch series connection. Combine circular telegram, the experiment of outage self -induction together, experiment phenomena is obvious, and the activity of student observed phenomenon, personal experience like this is just many, and it is easier to understand the self inductance.
Description
Technical field
The utility model relates to a kind of self induction demonstrating device.
Background technology
Self inductance is a kind of special electromagnetic induction phenomenon, and it causes due to the curent change of coil own.The electric current flowing through coil changes, and causes the magnetic flux through coil to change and the self-induction electromotive force that produces in coil, always hinders the change of coil Central Plains incoming current, and when original electric current is when increasing, self-induction electromotive force is contrary with original direction of current; When original electric current reduces, self-induction electromotive force is identical with original direction of current.Therefore, " self-induction " briefly, the electromagnetic induction phenomenon that the electric current due to conductor itself changes and produces, is called " self inductance " or " mutual inductance phenomenon ".
In teaching, multiplex two circuit demonstrate energising self-induction and self-inductance power respectively, as shown in Figure 1 and Figure 2.There are two shortcomings in this experimental provision: (1) demonstration energising self-induction, self-inductance power carry out respectively in two different circuit, if do self-inductance power experiment with Fig. 1 circuit, eye observation, less than experimental phenomena, easily brings that students concepts is understood, rule probes into guidance quality mistake.(2) self-induction electromotive force can not be observed in circuit intuitively and produce faradic direction.
Utility model content
The purpose of this utility model is to provide a kind of self induction demonstrating device.
To achieve these goals, the utility model adopts following technical scheme:
A kind of self induction demonstrating device, by self-induction coil, first light emitting diode, second light emitting diode 3, 3rd light emitting diode, 4th light emitting diode, current-limiting resistance, first bulb, second bulb, power supply and gauge tap composition, the first display circuit is unified into self-induction coil and the first bulb string after first light emitting diode is in parallel with the second light emitting diode, the first light emitting diode contrary with the second light emitting diode direction, the second display circuit is unified into current-limiting resistance and the second bulb string after 3rd light emitting diode is in parallel with the 4th light emitting diode, the 3rd light emitting diode contrary with the 4th light emitting diode direction, after first display circuit is in parallel with the second display circuit and power supply, gauge tap is connected.
Above-mentioned current-limiting resistance adopts rheochord.The glow color of the first light emitting diode, the second light emitting diode, the 3rd light emitting diode, the 4th light emitting diode is different.
The beneficial effects of the utility model:
(1) experiment teaching aid makes simple, easy to operate.
(2) energising, self-inductance power experiment are combined together, experimental phenomena is obvious, and the phenomenon that such observation of students arrives, the activity of personal experience are just many, understand be more prone to self inductance.
Accompanying drawing explanation
Fig. 1 is energising self-induction schematic diagram;
Fig. 2 is self-inductance power schematic diagram;
Fig. 3 is the utility model structural representation;
Wherein, 1. self-induction coil, 2. the first light emitting diode, 3. the second light emitting diode, 4. the 3rd light emitting diode, 5. the 4th light emitting diode, 6. current-limiting resistance, 7. the first bulb, 8. the second bulb, 9. power supply, 10. gauge tap.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As Fig. 3, a kind of self induction demonstrating device, by self-induction coil 1, first light emitting diode 2, second light emitting diode 3, 3rd light emitting diode 4, 4th light emitting diode 5, current-limiting resistance 6, first bulb 7, second bulb 8, power supply 9 and gauge tap 10 form, the first display circuit is connected into described self-induction coil 1 and described first bulb 7 after described first light emitting diode 2 is in parallel with described second light emitting diode 3, the first described light emitting diode 2 is contrary with described second light emitting diode 3 direction, the second display circuit is connected into described current-limiting resistance 6 and described second bulb 8 after described 3rd light emitting diode 4 is in parallel with described 4th light emitting diode 5, the 3rd described light emitting diode 4 is contrary with described 4th light emitting diode 5 direction, with described power supply 9 after described first display circuit is in parallel with described second display circuit, described gauge tap 10 is connected.
Described current-limiting resistance adopts rheochord.
The glow color of the first described light emitting diode 2, described second light emitting diode 3, the 3rd described light emitting diode 4, described 4th light emitting diode 5 is different.
Using method:
(1) be energized self-induction: closed described gauge tap 10, regulate described current-limiting resistance 6, make described first bulb 7, described second bulb 8 normal luminous, brightness is roughly the same.Disconnect described gauge tap 10, more closed described gauge tap 10 moment, namely can be observed the luminous time delay phenomenon of relatively described second bulb 8 of described first bulb 7.Meanwhile, described second light emitting diode 3 goes out sense of current with described 4th light emitting diode 5 luminescence display, and known electric current increases the self-induction electromotive force making to create the left positive right side in described self-induction coil 1 negative instantaneously and hinders electric current to flow through described first bulb 7.
(2) self-inductance power. disconnect described gauge tap 10 moment, described first bulb 7, described second bulb 8, described second light emitting diode 3, described 4th light emitting diode 5 extinguishes, be visually observed that described 3rd light emitting diode 4 is glittering demonstrates direction of current once, ask that reduction makes to create left negative right positive self-induction electromotive force in described self-induction coil 1 and flows through described second light emitting diode 3, so described second light emitting diode 3 is once glittering known electric current wink.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (3)
1. a self induction demonstrating device, it is characterized in that: by self-induction coil (1), first light emitting diode (2), second light emitting diode (3), 3rd light emitting diode (4), 4th light emitting diode (5), current-limiting resistance (6), first bulb (7), second bulb (8), power supply (9) and gauge tap (10) composition, the first display circuit is connected into described self-induction coil (1) and described first bulb (7) after described first light emitting diode (2) is in parallel with described second light emitting diode (3), described the first light emitting diode (2) is contrary with described second light emitting diode (3) direction, the second display circuit is connected into described current-limiting resistance (6) and described second bulb (8) after described 3rd light emitting diode (4) is in parallel with described 4th light emitting diode (5), the 3rd described light emitting diode (4) is contrary with described 4th light emitting diode (5) direction, described first display circuit is connected with described power supply (9) and described gauge tap (10) with after described second display circuit parallel connection.
2. device as claimed in claim 1, is characterized in that: described current-limiting resistance adopts rheochord.
3. device as claimed in claim 1, is characterized in that: the glow color of described the first light emitting diode (2), described second light emitting diode (3), the 3rd described light emitting diode (4), described 4th light emitting diode (5) is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520569687.0U CN204833857U (en) | 2015-08-02 | 2015-08-02 | Self inductance presentation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520569687.0U CN204833857U (en) | 2015-08-02 | 2015-08-02 | Self inductance presentation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204833857U true CN204833857U (en) | 2015-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520569687.0U Expired - Fee Related CN204833857U (en) | 2015-08-02 | 2015-08-02 | Self inductance presentation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204833857U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104680907A (en) * | 2015-03-17 | 2015-06-03 | 盐城工业职业技术学院 | Self inductance demonstrating instrument |
| CN111862743A (en) * | 2019-04-28 | 2020-10-30 | 谢博丽 | Improved method for power-off self-induction demonstration experiment |
-
2015
- 2015-08-02 CN CN201520569687.0U patent/CN204833857U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104680907A (en) * | 2015-03-17 | 2015-06-03 | 盐城工业职业技术学院 | Self inductance demonstrating instrument |
| CN111862743A (en) * | 2019-04-28 | 2020-10-30 | 谢博丽 | Improved method for power-off self-induction demonstration experiment |
| CN111862743B (en) * | 2019-04-28 | 2023-11-03 | 谢博丽 | Improved method for power-off self-inductance demonstration experiment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20151202 Termination date: 20160802 |