CN202534232U - Skin effect demonstrating device - Google Patents
Skin effect demonstrating device Download PDFInfo
- Publication number
- CN202534232U CN202534232U CN2012200181272U CN201220018127U CN202534232U CN 202534232 U CN202534232 U CN 202534232U CN 2012200181272 U CN2012200181272 U CN 2012200181272U CN 201220018127 U CN201220018127 U CN 201220018127U CN 202534232 U CN202534232 U CN 202534232U
- Authority
- CN
- China
- Prior art keywords
- skin effect
- irony
- cup
- bulb
- current output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Magnetic Treatment Devices (AREA)
Abstract
A skin effect demonstrating device for demonstrating electromagnetic filed propagation characteristics is disclosed. The skin effect demonstrating device is in a hollow structure, and the electromagnetic filed is propagated through ferromagnetic round cups and slender irony rods fixed at the centers of the cup bottom parts. The skin effect demonstrating device is characterized in that a small electric bulb one and a small electric bulb two that are identical are respectively fixed on outer walls of the irony cup and at top ends of the slender rods, the irony cups and the slender rods are fixed through an insulation support, the two small electric bulbs are linked to a tunable alternating electric current output platform through plugs. How the electromagnetic filed is distributed when propagated on the irony cups and the slender rods can be indicated through the brightness variation of the two identical small electric bulbs after alternating currents with different frequencies are output from the tunable alternating electric current output platform, and therefore the relation between the skin effect and the frequencies is demonstrated.
Description
Technical field
The utility model relates to a kind of skin effect demonstration appearance, particularly relates to a kind of use hollow ferromagnetics material demonstration electromagnetic field skin effect phenomenon.
Background technology
Present common skin effect demonstration appearance is to connect two identical bulbs on the surface of the thin bar of solid irony and center, top; It is luminous to utilize the thin bar of solid irony to make conductor propagation electromagnetic field driving bulb, the distribution situation when propagating in the thin bar of irony according to the electromagnetic field of bulb light and shade change demonstration different frequency.
Problem be many at home general physics teaching material with some documents in all explain for skin effect phenomenon with vortex current: think that skin effect is a kind of electromagnetic induction phenomenon; Prerequisite is that hypothesis conductor inside exists exchange current; The magnetic field that the electric current that changes changes in conductor inside; The magnetic field that changes excites induction electromotive force again in conductor, produce vortex current, and has phase differential to exist between induction electromotive force and the eddy current.The result of this eddy current and former incoming current stack always increases the current density of conductor edge, and the inner current density of conductor is reduced, and produces the skin phenomenon that significantly becomes along with the frequency of electric current increases.Though this model simple, intuitive is inapt in theory, also easily skin effect is misunderstood; Set up the model of a mistake: the input current frequency is big more; Skin effect phenomenon is obvious more, thinks only when high frequency, just skin effect can take place, and does not take place during low frequency; Think that skin effect that exchange current produces is a kind of electric current and begins the effect concentrated to exocuticle gradually from the axis of conductor, and just the opposite with the forming process of reality.The present demonstration instrument above-mentioned misunderstanding of failing effectively to solve.
Summary of the invention
For defective and the deficiency that overcomes existing skin effect demonstration instrument; The utility model provides a kind of skin effect demonstration appearance, and this demonstrator adopts the structure of hollow type, justifies the fixedly thin bar of irony of cup cup bottom centre in ferromagnetics; Respectively at iron cup outer wall and the thin same bulb of masthead end stationary phase; Again with the fixing iron cup of insulating support, thin bar is through plug and tunable exchange current output stage UNICOM.Utilize tunable exchange current output stage output different frequency alternating current, propagate electromagnetic field through ferromagnetics circle cup and the thin bar of irony.Change the electromagnetic field that to judge different frequency distribution situation in iron cup and thin bar according to two identical bulb light and shades, demonstrate then between skin effect and frequency and concern.
The utility model technical scheme that is adopted of dealing with problems is: demonstration instrument is combined by the very big ferromagnetics material circle cup of magnetic permeability, the two less thin bar of irony, insulation fixed support, two identical bulbs and tunable exchange current output stages of xsects.The demonstration instrument structure from top to bottom is respectively: two identical thin bars of iron cup, irony that are fixed on the insulating support are fixed on the bottom centre in the iron cup, and the two is integrated; Two identical bulbs are separately fixed on the outer wall of iron cup and the thin masthead end of irony.Be connected with tunable exchange current output stage through plug.Adopt the round cup shape ferromagnetics material to be equivalent to large-section lead,, just just can not take place during high frequency even also skin effect phenomenon can take place when therefore the input current frequency is relatively low.Round iron cup inner hollow can be cut off eddy current, and electric current can't be concentrated to iron cup exocuticle from the axis of lead gradually, and to avoid causing skin effect be exchange current begins the illusion concentrated to exocuticle gradually from the axis of lead.
The beneficial effect of the utility model is: the regularity of distribution when electromagnetic field that can the ocular demonstration different frequency is propagated in ferromagnetics; Simple in structure; The lecture experiment phenomenon is obvious, and the physical process of reflection is more directly perceived, clear, comprehensive, can deepen the understanding to skin effect.
Description of drawings
Fig. 1 is a skin effect demonstration appearance synoptic diagram.
Among the figure: the round iron cup of 1-, 2-bulb one, the thin bar of 3-irony, 4-plug, the 5-fixed support that insulate, 6-is tunable exchange current output stage, 7-bulb two.
Embodiment
In Fig. 1, this apparatus structure from top to bottom is respectively: on the outer wall that two identical round iron cups 1 are fixed on the insulating support 5, two identical bulbs one and bulb two are connected in round iron the cup 1 respectively and thin bar of irony 3 tops.Be connected with tunable exchange current output stage 6 through plug 4.Utilize tunable exchange current output stage output different frequency alternating current, propagate electromagnetic field with ferromagnetics circle cup and the thin bar of irony.Change through two identical bulb light and shades and can judge electromagnetic field distribution situation in iron cup and thin bar, demonstrate then between skin effect and frequency and concern.
Claims (1)
1. a skin effect demonstration appearance is justified cup by ferromagnetics, thin bar; Bulb, insulating support and tunable exchange current output stage are formed, and it is characterized in that: the structure that adopts hollow type; With ferromagnetics circle cup be fixed on the thin bar of glass bottom centre's irony and propagate electromagnetic field, respectively at iron cup outer wall and thin masthead end stationary phase with bulb one and bulb two, utilize fixedly iron cup of insulating support again; Thin bar is through plug and tunable exchange current output stage UNICOM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200181272U CN202534232U (en) | 2012-01-16 | 2012-01-16 | Skin effect demonstrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200181272U CN202534232U (en) | 2012-01-16 | 2012-01-16 | Skin effect demonstrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202534232U true CN202534232U (en) | 2012-11-14 |
Family
ID=47135398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200181272U Expired - Fee Related CN202534232U (en) | 2012-01-16 | 2012-01-16 | Skin effect demonstrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202534232U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109741669A (en) * | 2019-02-28 | 2019-05-10 | 中国地质大学（武汉） | The demonstrator of method demonstration skin effect based on equivalent measuring resistance |
| CN110288889A (en) * | 2019-07-30 | 2019-09-27 | 新疆工程学院 | A kind of homogeneous half space plane electric fields distribution characteristics experimental provision and experimental method |
-
2012
- 2012-01-16 CN CN2012200181272U patent/CN202534232U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109741669A (en) * | 2019-02-28 | 2019-05-10 | 中国地质大学（武汉） | The demonstrator of method demonstration skin effect based on equivalent measuring resistance |
| CN110288889A (en) * | 2019-07-30 | 2019-09-27 | 新疆工程学院 | A kind of homogeneous half space plane electric fields distribution characteristics experimental provision and experimental method |
| CN110288889B (en) * | 2019-07-30 | 2024-06-04 | 新疆工程学院 | Experimental device and experimental method for uniform half-space plane electric field distribution characteristics |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202534232U (en) | Skin effect demonstrating device | |
| CN202282235U (en) | Ethernet coupling transformer for plasma television | |
| CN103035990A (en) | Low Temperature Co-Fired Ceramic (LTCC) filter | |
| CN203552901U (en) | Primary framework and second framework opposite insertion type transformer | |
| CN102420041A (en) | Transformer and transformation device | |
| CN201707817U (en) | Electromagnetic induction demonstrator | |
| CN203133258U (en) | Rotor magnetic force detection alarm | |
| CN105141280A (en) | LC filtering system, LC filtering circuit, electronic circuit and device | |
| CN202422964U (en) | Transformer and transforming device | |
| CN204759850U (en) | Heat radiation experiment appearance | |
| CN206649988U (en) | A kind of new SMD plastic uptakes and high frequency transformer against pressure | |
| CN206672762U (en) | A kind of electric ballast FERRITE CORE | |
| CN204695650U (en) | A kind of self-inductive phenomenon demonstration instrument | |
| CN204146779U (en) | The inducing luminous double-deck Advertisement cup of a kind of capacitance touch | |
| CN203895259U (en) | Current transformer | |
| CN103149543B (en) | Magnetic detection alarm of rotor | |
| CN203325300U (en) | Signal generator for electric automatization teaching | |
| CN203950661U (en) | Vertical transformer | |
| CN202454135U (en) | Instrument for demonstrating floating and sinking of magnetic liquid | |
| CN204145726U (en) | The new-type voice coil loudspeaker voice coil of a kind of racetrack | |
| CN204351687U (en) | Spontaneous heating electric wok | |
| CN203120248U (en) | Circuit structure of LED backlight source | |
| CN103974478B (en) | A kind of frequency multiplication induction heating power based on full bridge inverter | |
| CN203278902U (en) | Transparent mobile terminal | |
| CN204926993U (en) | Small transformer |
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: 20121114 Termination date: 20140116 |