CN201707821U - Demonstration experimental device for long/short distance power transmission - Google Patents
Demonstration experimental device for long/short distance power transmission Download PDFInfo
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- CN201707821U CN201707821U CN2010202366768U CN201020236676U CN201707821U CN 201707821 U CN201707821 U CN 201707821U CN 2010202366768 U CN2010202366768 U CN 2010202366768U CN 201020236676 U CN201020236676 U CN 201020236676U CN 201707821 U CN201707821 U CN 201707821U
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- power transmission
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Abstract
A demonstration experimental device for long/short distance power transmission comprises an alternating current power source and at least two leads. The alternating current power source is connected with a first channel and a second channel which are connected in parallel, the first channel comprises a step-up transformer, resistors, a step-down transformer and a bulb which are connected sequentially from an output end of the alternating current power source, the resistors include a constant resistor and an adjustable resistor, and the second channel comprises the constant resistor, the adjustable resistor and the bulb which are connected in series. The demonstration experimental device has the advantages that brightness change of the bulb can be observed directly by means of regulating the alternating current power source and the adjustable resistor, so that students are impressed and understand principle of long/short distance power transmission more visually.
Description
Technical field
The utility model relates to a kind of experimental provision that is used to impart knowledge to students, and is meant especially a kind ofly can demonstrate the far away/experimental provision of transmission of electricity closely intuitively.
Background technology
Long distance power transmission is the integrated use of electricity knowledges such as exchange current, transformer, electric power, the law of resistance, Ohm law, also is the exemplary that electricity knowledge solves practical problems.In the physics study course of senior middle school, remote high voltage power transmission is the emphasis of college entrance examination always, but it is the difficult point of teaching.How be theoretically on the textbook reduces energy loss, and existing teaching method is to see the picture of several high voltage power transmissions simply to the student, and this teaching method is more abstract, and the student often can't understand preferably.Because can't help the student more profoundly to understand the principle of high voltage power transmission by testing targetedly, therefore a lot of students always have half knowledge to this part content of remote high voltage power transmission.
Summary of the invention
The utility model provides far/closely demonstrating experiment device of transmission of electricity of simulation, its purpose is to fill up far/closely blank of the education experiment of field of power transmission, can reduce difficulty to knowledge understanding by this experimental provision simultaneously, the help student's ratio is more profoundly understood the principle of high voltage power transmission and suitable occasion thereof.
The technical solution of the utility model is as follows:
Shu Dian demonstrating experiment device far away/closely, comprise an AC power and the lead more than two, be connected with first path and alternate path parallel with one another on this AC power, described first path comprises step-up transformer, active component, step-down transformer and the bulb that connects successively from the output terminal that exchanges power supply, and described active component comprises solid value resistance and adjustable resistance; Described alternate path comprises solid value resistance, adjustable resistance and the bulb of mutual series connection.
As improvement of the present utility model, described adjustable resistance is slide rheostat or variable rheostat.
As improvement of the present utility model, the described resistance that is worth admittedly is resistance wire.
As improvement of the present utility model, described AC power is for can regulate the regulated power supply of input voltage size.
Further improve as of the present utility model, described experimental provision also comprises a substrate, and the circuit component on described first path and the alternate path is installed on this substrate.
Compared with prior art to description of the present utility model as can be known by above-mentioned, advantage of the present utility model is that it can illustrate following problem more intuitively:
1, the resistance of long distance power transmission is by adjustable resistance be worth resistance series connection expression admittedly, when the resistance of adjustable resistance is big, it is brighter than the bulb that does not insert the transformer path to can be observed the bulb that inserts the transformer path, this explanation high voltage power transmission when long distance power transmission is more energy-conservation, this moment, the input voltage regulation with AC power must be big more, the bright dark difference of two bulbs is just obvious more, and this illustrates that high voltage power transmission is more energy-conservation when high-power transmission of electricity.
2, the input voltage of AC power is constant, by regulating the resistance size of adjustable resistance, the bulb brightness that can be observed the path that inserts transformer does not almost change, the bulb that does not insert on the path of transformer then changes obviously, the electric current of the path of above-mentioned phenomenon explanation access transformer is less, and line loss is less.
3, when the resistance of adjustable resistance hour, it is brighter to can be observed the bulb that does not connect the transformer path, illustrate that high voltage power transmission is also impracticable when close together, this moment, the input voltage regulation with AC power must be more little, the bright dark difference of two bulbs is just obvious more, this explanation is when miniwatt is transmitted electricity, and high voltage power transmission is also impracticable.Because transformer itself also has certain electric energy loss, so high voltage power transmission is also impracticable in miniwatt is transmitted electricity and closely transmitted electricity.
Another advantage of the present invention is: because the circuit component on described two paths is fixedly arranged on the substrate, and this substrate can vertically place, thereby can make things convenient for the teacher to give lessons on the dais, and the student's brightness that also can clearly observe bulb simultaneously changes.
Description of drawings
Fig. 1 is a block diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model;
Fig. 3 is a perspective view of the present utility model.
Embodiment
Embodiment of the present utility model is described with reference to the accompanying drawings.
See figures.1.and.2, far away/demonstrating experiment device of transmission of electricity closely, comprise an AC power 1 and some lead 2 being connected with first path and alternate path parallel with one another on this AC power 1.Described first path comprises the step-up transformer 31 that connects successively, is worth resistance 51, adjustable resistance 41, step-down transformer 32 and bulb 61 admittedly from the output terminal that exchanges power supply 1; Described alternate path comprises solid value resistance 52, adjustable resistance 42 and the bulb 62 of mutual series connection from the output terminal that exchanges power supply 1.The rated power of described bulb 61,62 is identical; The transformation scope of described step-up transformer 31, step-down transformer 32 is about 20 times; The range of adjustment of the input voltage of described AC power 1 is about the 4-12 volt, and is equiped with switch 8 on this AC power 1.
Refer again to Fig. 3, described adjustable resistance 41,42 is slide rheostat, and the maximum value of this slide rheostat is 20 ohm; The described resistance 51,52 that is worth admittedly is the resistance wire that resistance is about 15 ohm; Be equipped with binding post 81 on described slide rheostat 41,42 and the bulb 61,62, described lead 2 is connected on the binding post 81.Described experimental provision also comprises a substrate 7, and the circuit component on described first path and the alternate path all is fixed on this substrate 7.Aforesaid substrate 7 can vertically be placed, thereby can make things convenient for the teacher to give lessons on the dais, and the student also can clearly observe the brightness variation of bulb 61,62 simultaneously.In addition, on the described substrate 7 terminal block 9 is installed also, be equiped with two binding posts 91 on this terminal block 9, the two ends of AC power 1 are connected on two binding posts 91 of this terminal block 9, and described AC power 1 is given circuit component on first path and the alternate path by terminal block 9 with electric energy transmitting.
This experimental provision can mainly be demonstrated following teaching operation:
1, the resistance of long distance power transmission is by adjustable resistance 41 be worth resistance 51 series connection expression admittedly, adjustable resistance 41 is transferred to higher value, the bulb 61 that can be observed first path is brighter than the bulb 62 of alternate path not, and this explanation high voltage power transmission when long distance power transmission is more energy-conservation; This moment, the input voltage regulation with AC power 1 must be big more, and the bright dark difference of two bulbs 61,62 is just obvious more, and this illustrates that high voltage power transmission is more energy-conservation when high-power transmission of electricity.
2, the input voltage of AC power 1 is remained unchanged, by regulating the resistance size of adjustable resistance 41,42, bulb 61 brightness that can be observed first path almost do not change, bulb 62 on the alternate path then changes obviously, the electric current of first path of above-mentioned phenomenon explanation high voltage power transmission is less, and line loss is less.
3, the resistance with adjustable resistance 41,42 is adjusted to smaller value, is used for closely transmission of electricity of simulation, and the bulb 62 that can be observed alternate path is brighter on the contrary, and this explanation high voltage power transmission is also impracticable when close together.This moment, the input voltage regulation with AC power 1 must be more little, and the bright dark difference of two bulbs 61,62 is just obvious more, and this illustrates that when miniwatt is transmitted electricity high voltage power transmission is also impracticable.Because step-up transformer 31 and step-down transformer 32 itself all have certain electric energy loss, so high voltage power transmission is also impracticable in miniwatt is transmitted electricity and closely transmitted electricity.
In addition, the described resistance 51,52 that is worth admittedly also can be replaced by common resistance; Described adjustable resistance 41,42 also can be substituted by variable rheostat.
Above-mentioned only is embodiment of the present utility model, but design concept of the present utility model is not limited thereto, and allly utilizes this design that the utility model is carried out the change of unsubstantiality, all should belong to the behavior of invading the utility model protection domain.
Claims (5)
1. far away/demonstrating experiment device of transmission of electricity closely, comprise an AC power and the lead more than two, it is characterized in that: be connected with first path and alternate path parallel with one another on this AC power, described first path comprises step-up transformer, active component, step-down transformer and the bulb that connects successively from the output terminal that exchanges power supply, and described active component comprises solid value resistance and adjustable resistance; Described alternate path comprises solid value resistance, adjustable resistance and the bulb of mutual series connection.
2. far/closely demonstrating experiment device of transmission of electricity as claimed in claim 1, it is characterized in that: described adjustable resistance is slide rheostat or variable rheostat.
3. far/closely demonstrating experiment device of transmission of electricity as claimed in claim 1, it is characterized in that: the described resistance that is worth admittedly is resistance wire.
4. far/closely demonstrating experiment device of transmission of electricity as claimed in claim 1, it is characterized in that: described AC power is for can regulate the regulated power supply of input voltage size.
5. as arbitrary described far/closely demonstrating experiment device of transmission of electricity of claim 1 to 4, it is characterized in that: described experimental provision also comprises a substrate, and the circuit component on described first path and the alternate path is installed on this substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202366768U CN201707821U (en) | 2010-06-25 | 2010-06-25 | Demonstration experimental device for long/short distance power transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202366768U CN201707821U (en) | 2010-06-25 | 2010-06-25 | Demonstration experimental device for long/short distance power transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201707821U true CN201707821U (en) | 2011-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202366768U Expired - Fee Related CN201707821U (en) | 2010-06-25 | 2010-06-25 | Demonstration experimental device for long/short distance power transmission |
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| CN (1) | CN201707821U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109166421A (en) * | 2018-09-10 | 2019-01-08 | 浙江电腾云光伏科技有限公司 | A kind of photo-voltaic power generation station object teaching emulation platform and emulation mode |
-
2010
- 2010-06-25 CN CN2010202366768U patent/CN201707821U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109166421A (en) * | 2018-09-10 | 2019-01-08 | 浙江电腾云光伏科技有限公司 | A kind of photo-voltaic power generation station object teaching emulation platform and emulation mode |
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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: 20110112 Termination date: 20130625 |