CN201289703Y - Electromagnetic induction demonstration instrument - Google Patents
Electromagnetic induction demonstration instrument Download PDFInfo
- Publication number
- CN201289703Y CN201289703Y CNU2008202209666U CN200820220966U CN201289703Y CN 201289703 Y CN201289703 Y CN 201289703Y CN U2008202209666 U CNU2008202209666 U CN U2008202209666U CN 200820220966 U CN200820220966 U CN 200820220966U CN 201289703 Y CN201289703 Y CN 201289703Y
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- CN
- China
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- coil
- frame
- iron core
- main coil
- inductive coil
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Abstract
The utility model relates to a demonstration device for teaching purpose, in particular to an electromagnetic induction demonstration instrument. The electromagnetic induction demonstration instrument comprises coils, an iron core and a battery, wherein, the coils include a main coil and an induction coil which are sleeved at the two ends of the iron core respectively; the main coil and the induction coil are respectively hung on a main coil rack and an induction coil rack through conducting wires; the iron core is horizontally fixed on an iron core rack through an insulating elastic chuck; the main coil rack and the induction coil rack are fixed on a base; the iron core rack is inserted or fixed on the base; a galvanometer and a battery box are further installed on the base; two ends of the main coil and two ends of the induction coil are connected with the battery box and the galvanometer respectively through conducting wires; the battery and a current-limiting resistor are mounted in the battery box; and a switch is installed on the outer surface of the battery box. The electromagnetic induction demonstration instrument provided has the advantages of simple structure, low cost and good demonstration effect.
Description
(1), technical field:
The utility model relates to a kind of teaching demonstration utensil, particularly a kind of electromagnetic induction demonstration instrument.
(2), background technology:
At present, teaching generally all is that the utilization Lenz law is judged for electromagnetic induction, classroom instruction use mostly this law carry out hot-wire coil stressed, produce magnetic field and induced electromotive force, existing demonstration equipment is too simple, DeGrain brings a lot of inconvenience to teaching, though and some demonstration equipment effect is better, but, be unsuitable for general school and use because its structure is complicated, cost is high.
(3), utility model content:
The technical problems to be solved in the utility model is: at the prior art deficiency, provide a kind of simple in structure, cost is low, the electromagnetic induction demonstration instrument of good demonstration effect.
The technical solution of the utility model:
A kind of electromagnetic induction demonstration instrument, contain coil, iron core and battery, coil contains main coil and inductive coil, main coil and inductive coil are set in the two ends of iron core, main coil and inductive coil are hung respectively on main coil frame and inductive coil frame by lead, iron core is horizontally fixed on the iron core frame by the insulation collet, main coil frame and inductive coil frame all are fixed on the base, the iron core frame is pegged graft or is fixed on the base, galvanometer and battery case also are installed on the base, and the two ends of main coil and inductive coil are connected with galvanometer with battery case respectively by lead.
Battery, current-limiting resistance are installed in the battery case, and the battery case outside surface is equipped with switch, and an end of main coil is connected with an end of battery by the series circuit of current-limiting resistance and switch, and the other end of main coil is connected with the other end of battery; The two ends of inductive coil are connected with galvanometric two ends.
Main coil frame and inductive coil frame are inverted "L" shaped, the iron core frame is a cylindricality, the insulation collet is fixed on the upper end of iron core frame, and lead makes main coil and inductive coil hang on main coil frame and inductive coil frame by being wrapped on main coil frame and the inductive coil frame.
Main coil and inductive coil are naked wire coil or the wire coil that contains external insulation layer, and main coil and inductive coil are single-turn circular coil, or are two circle coils, or are three circle coils, or are four circle coils.
Main coil frame, inductive coil frame and iron core frame are metal frame or plastic processing frame, and the material of insulation collet is plastics, and lead is the lead that contains external insulation layer.
When demonstrating, connect the switch on the battery case, at this moment can see the galvanometric beat of pointer once, according to the principle of electromagnetic induction as can be known, when the variation of electric current is arranged on the main coil, can cause the changes of magnetic field in the iron core, the magnetic field of variation will make and produce electric current on the inductive coil.
The beneficial effects of the utility model:
1. the utility model contains coil, iron core, galvanometer, battery case, coil brace and iron core support, simple in structure, draw materials easily, cost is low, be fit to very much general teaching and use.
2. demonstration effect of the present utility model is directly perceived, effective.
(4), description of drawings:
Fig. 1 is the structural representation of electromagnetic induction demonstration instrument;
Fig. 2 is the electrical connecting wires synoptic diagram of electromagnetic induction demonstration instrument.
(5), embodiment:
Referring to Fig. 1, Fig. 2, among the figure, the electromagnetic induction demonstration instrument contains coil, iron core 1 and battery BT, coil contains main coil 3 and inductive coil 2, main coil 3 and inductive coil 2 are set in the two ends of iron core 1, main coil 3 and inductive coil 2 are hung respectively on main coil frame 12 and inductive coil frame 10 by lead 13 and 11, iron core 1 is horizontally fixed on the iron core frame 5 by insulation collet 4, main coil frame 12 and inductive coil frame 10 all are fixed on the base 8, iron core frame 5 is plugged on the base 8, galvanometer J and battery case 6 also are installed on the base 8, and the two ends of main coil 3 and inductive coil 2 are connected with galvanometer J with battery case 6 respectively with 11 by lead 13.
Battery BT, current-limiting resistance R are installed in the battery case 6, and battery case 6 outside surfaces are equipped with K switch, and an end of main coil 3 is connected with the negative terminal of battery BT by the series circuit of current-limiting resistance R and K switch, and the other end of main coil 3 is connected with the anode of battery BT; The two ends of inductive coil 2 are connected with the two ends of galvanometer J.
Claims (5)
1, a kind of electromagnetic induction demonstration instrument, contain coil, iron core and battery, it is characterized in that: coil contains main coil and inductive coil, main coil and inductive coil are set in the two ends of iron core, main coil and inductive coil are hung respectively on main coil frame and inductive coil frame by lead, iron core is horizontally fixed on the iron core frame by the insulation collet, main coil frame and inductive coil frame all are fixed on the base, the iron core frame is pegged graft or is fixed on the base, galvanometer and battery case also are installed on the base, and the two ends of main coil and inductive coil are connected with galvanometer with battery case respectively by lead.
2, electromagnetic induction demonstration instrument according to claim 1, it is characterized in that: battery, current-limiting resistance are installed in the described battery case, the battery case outside surface is equipped with switch, one end of main coil is connected with an end of battery by the series circuit of current-limiting resistance and switch, and the other end of main coil is connected with the other end of battery; The two ends of inductive coil are connected with galvanometric two ends.
3, electromagnetic induction demonstration instrument according to claim 1 and 2, it is characterized in that: described main coil frame and inductive coil frame are inverted "L" shaped, described iron core frame is a cylindricality, the insulation collet is fixed on the upper end of iron core frame, and described lead makes main coil and inductive coil hang on main coil frame and inductive coil frame by being wrapped on main coil frame and the inductive coil frame.
4, electromagnetic induction demonstration instrument according to claim 3, it is characterized in that: described main coil and inductive coil are naked wire coil or the wire coil that contains external insulation layer, and described main coil and inductive coil are single-turn circular coil, or are two circle coils, or be three circle coils, or be four circle coils.
5, electromagnetic induction demonstration instrument according to claim 4 is characterized in that: described main coil frame, inductive coil frame and iron core frame are metal frame or plastic processing frame, and the material of described insulation collet is plastics, and described lead is the lead that contains external insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202209666U CN201289703Y (en) | 2008-11-14 | 2008-11-14 | Electromagnetic induction demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202209666U CN201289703Y (en) | 2008-11-14 | 2008-11-14 | Electromagnetic induction demonstration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201289703Y true CN201289703Y (en) | 2009-08-12 |
Family
ID=40981382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202209666U Expired - Fee Related CN201289703Y (en) | 2008-11-14 | 2008-11-14 | Electromagnetic induction demonstration instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201289703Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268725A (en) * | 2013-06-06 | 2013-08-28 | 雷建设 | High-voltage control magnetic suspension teaching demonstration instrument |
-
2008
- 2008-11-14 CN CNU2008202209666U patent/CN201289703Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268725A (en) * | 2013-06-06 | 2013-08-28 | 雷建设 | High-voltage control magnetic suspension teaching demonstration instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090812 Termination date: 20091214 |