CN204695650U - A kind of self-inductive phenomenon demonstration instrument - Google Patents
A kind of self-inductive phenomenon demonstration instrument Download PDFInfo
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- CN204695650U CN204695650U CN201520359601.1U CN201520359601U CN204695650U CN 204695650 U CN204695650 U CN 204695650U CN 201520359601 U CN201520359601 U CN 201520359601U CN 204695650 U CN204695650 U CN 204695650U
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- bulb
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- transformer
- illustrative circuitry
- inductance
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Abstract
The utility model discloses a kind of self-inductive phenomenon demonstration instrument in experimental apparatus field, comprise demonstration board, the middle part of demonstration board is provided with transformer, the both sides of transformer are provided with energising illustrative circuitry and electric discharge illustrative circuitry, energising illustrative circuitry comprises the first bulb circuit and the second bulb circuit that are connected in parallel on the first both ends of power, first bulb circuit comprises the first bulb and the potentiometer of series connection, second bulb circuit comprises the second bulb and first inductance of series connection, and the first power supply is other is serially connected with the first switch; Electric discharge illustrative circuitry comprises the 3rd bulb and the second inductance that are connected in parallel on second source two ends, second source other serial connection second switch, first power supply and second source connect on the transformer through switch, the utility model structure is simple, experimentation is convenient, experimental demonstration structural visual, can be used in physics teaching.
Description
Technical field
The utility model relates to a kind of experimental apparatus, particularly a kind of self-inductive phenomenon demonstration instrument.
Background technology
Self inductance is the special circumstances in electromagnetic induction phenomenon, and the electromagnetic induction phenomenon that the electric current due to conductor itself changes and produces is called self inductance.Existing school is when carrying out this Physical Experiment, and generally undertaken by the mode of field wiring, this mode is comparatively loaded down with trivial details, inconvenient.
Utility model content
The purpose of this utility model is to provide a kind of self-inductive phenomenon demonstration instrument, and structure is simple, and experimental demonstration is convenient directly perceived.
The purpose of this utility model is achieved in that a kind of self-inductive phenomenon demonstration instrument, comprise demonstration board, the middle part of demonstration board is provided with transformer, the both sides of transformer are provided with energising illustrative circuitry and electric discharge illustrative circuitry, described energising illustrative circuitry comprises the first bulb circuit and the second bulb circuit that are connected in parallel on the first both ends of power, first bulb circuit comprises the first bulb and the potentiometer of series connection, second bulb circuit comprises the second bulb and first inductance of series connection, and the first power supply is other is serially connected with the first switch; Electric discharge illustrative circuitry comprises the 3rd bulb and the second inductance that are connected in parallel on second source two ends, and second source other serial connection second switch, the first power supply and second source connect on the transformer through switch.
Utility model works is away from being distracted law: faradic magnetic field hinders the change causing faradic magnetic flux always, and therefore when the electric current of conductor changes, conductor inherently produces induction electromotive force.This induction electromotive force will hinder the change of conductor Central Plains incoming current.When connecting the moment of circuit, electric current in circuit increases, through the magnetic flux of coil also along with increase, thus induction electromotive force will inevitably be produced in coil, this induction electromotive force hinders the electric current in coil to increase, so can only be increased gradually by the electric current of the bulb with coils connected in series, bulb can only be light gradually, suddenly weakened by the electric current of coil when the moment that circuit disconnects, the magnetic flux through coil also just reduces very soon.Thus in coil, induction electromotive force is produced, although at this moment power supply disconnects, but coil and bulb constitute closed circuit, in this closed circuit, there is induction current to pass through, so bulb can not extinguish immediately, and when rapid cut-off switch, the induced electricity of generation fails to be convened for lack of a quorum very large, thus bulb extinguishes after brightening on the contrary again.Compared with prior art, the beneficial effects of the utility model are, the utility model structure is simple, and experimentation is convenient, experimental demonstration structural visual.The utility model can be used in physics teaching.
More safe and reliable in order to make this device preserve, described first bulb, the second bulb, the 3rd bulb are installed on lamp panel.
In order to make this device demonstrating effect better, the wiring of described first bulb, the second bulb, the 3rd bulb, the first inductance, the second inductance, potentiometer, the first switch, second switch, the first power supply, second source and transformer all connects at demonstration board rear portion.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model stereographic map.
Wherein, 1 demonstration board, 2 lamp panels, 3 first bulbs, 4 potentiometers, 5 first inductance, 6 transformers, 7 the 3rd bulbs, 8 second inductance, 9 second sources, 10 second switches, 11 switches, 12 first switches, 13 first power supplys, 14 second bulbs.
Embodiment
A kind of self-inductive phenomenon demonstration instrument as shown in Figure 1-2, comprise demonstration board 1, the middle part of demonstration board 1 is provided with transformer 6, the both sides of transformer 6 are provided with energising illustrative circuitry and electric discharge illustrative circuitry, described energising illustrative circuitry comprises the first bulb 3 circuit and the second bulb circuit that are connected in parallel on the first power supply 13 two ends, first bulb 3 circuit comprises the first bulb 3 and the potentiometer 4 of series connection, second bulb circuit comprises the second bulb 14 of series connection and the first inductance 5, first power supply 13 is other is serially connected with the first switch 12; Electric discharge illustrative circuitry comprises the 3rd bulb 7 and the second inductance 8 being connected in parallel on second source 9 two ends, second source 9 other serial connection second switch 10, first power supply 13 and second source 9 are connected on transformer 6 through switch 11, described first bulb 3, second bulb 14, the 3rd bulb 7 are installed on lamp panel 2, all carry out at demonstration board 1 rear portion with the wiring of last circuit original paper.
During utility model works, during demonstration energising phenomenon: utilize switch 11 to connect the first power supply 13(DC10V), close the first switch 12, regulator potentiometer 4 knob, makes upper and lower first bulb 3, second bulb 14 brightness the same, then deenergization, after spending half a minute, close a switch rapidly, can see that the bulb of connecting with potentiometer 4 is first bright, and with the bulb of coils connected in series after bright.During demonstration circut breaking: connect second source 9(DC4V), close second switch 10, and the 3rd bulb 7 is bright, and rapid cut-off switch, can see that bulb is not extinguish, but extinguish again after brightening instantaneously.
The utility model is not limited to above-described embodiment; on the basis of technical scheme disclosed in the utility model; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some to some technical characteristics wherein to replace and distortion, these are replaced and are out of shape all in protection domain of the present utility model.
Claims (3)
1. a self-inductive phenomenon demonstration instrument, it is characterized in that, comprise demonstration board, the middle part of demonstration board is provided with transformer, the both sides of transformer are provided with energising illustrative circuitry and electric discharge illustrative circuitry, and described energising illustrative circuitry comprises the first bulb circuit and the second bulb circuit that are connected in parallel on the first both ends of power, and the first bulb circuit comprises the first bulb and the potentiometer of series connection, second bulb circuit comprises the second bulb and first inductance of series connection, and the first power supply is other is serially connected with the first switch; Electric discharge illustrative circuitry comprises the 3rd bulb and the second inductance that are connected in parallel on second source two ends, and second source other serial connection second switch, the first power supply and second source connect on the transformer through switch.
2. a kind of self-inductive phenomenon demonstration instrument according to claim 1, is characterized in that, described first bulb, the second bulb, the 3rd bulb are installed on lamp panel.
3. a kind of self-inductive phenomenon demonstration instrument according to claim 1 and 2, it is characterized in that, the wiring of described first bulb, the second bulb, the 3rd bulb, the first inductance, the second inductance, potentiometer, the first switch, second switch, the first power supply, second source and transformer all connects at demonstration board rear portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520359601.1U CN204695650U (en) | 2015-05-29 | 2015-05-29 | A kind of self-inductive phenomenon demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520359601.1U CN204695650U (en) | 2015-05-29 | 2015-05-29 | A kind of self-inductive phenomenon demonstration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204695650U true CN204695650U (en) | 2015-10-07 |
Family
ID=54235914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520359601.1U Expired - Fee Related CN204695650U (en) | 2015-05-29 | 2015-05-29 | A kind of self-inductive phenomenon demonstration instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204695650U (en) |
-
2015
- 2015-05-29 CN CN201520359601.1U patent/CN204695650U/en not_active Expired - Fee Related
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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: 20151007 Termination date: 20200529 |