CN103268725A - High-voltage control magnetic suspension teaching demonstration instrument - Google Patents
High-voltage control magnetic suspension teaching demonstration instrument Download PDFInfo
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- CN103268725A CN103268725A CN2013102258051A CN201310225805A CN103268725A CN 103268725 A CN103268725 A CN 103268725A CN 2013102258051 A CN2013102258051 A CN 2013102258051A CN 201310225805 A CN201310225805 A CN 201310225805A CN 103268725 A CN103268725 A CN 103268725A
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Abstract
The invention relates to a high-voltage control magnetic suspension teaching demonstration instrument, comprising a bracket, wherein a control box is arranged at the upper end of the bracket; a rotating suspended object is placed below the control box; a permanent magnet is arranged at the top end of the suspended object; the control box is connected with a work controller; the work controller comprises a high-voltage coil working power supply, an amplification triode, a switching triode, a low-voltage working power supply and a signal amplifier; the control box comprises a high-voltage primary coil, an iron core and a secondary winding; the iron core is arranged in the high-voltage primary coil; the secondary winding is arranged at the bottom of the high-voltage primary coil; the high-voltage primary coil and the secondary winding adopt a mixed winding mode; the height of the secondary winding is 2/5 of the height of the whole primary coil; and a Hall element OH3503 is arranged at the bottom of the high-voltage primary coil. Coil high-voltage power supply is adopted, so the cost and the weight of the demonstration instrument are reduced and the weight of the suspended object is increased; and a function of automatically rotating the suspended object (clockwise or anticlockwise) is increased, so the demonstration instrument is intuitive, scientific and advanced.
Description
Technical field
The present invention relates to a kind of magnetic levitation demonstration instrument for teaching, be specifically related to a kind of high voltage control magnetic levitation demonstration instrument for teaching.
Background technology
In physics teaching in secondary school, utilize the ferromagnetic controllability of electromagnetism to cooperate sensor and electronic circuit to realize object is suspended in the air, make us pleasantly surprised, excite student's learning interest, excite the student to seek wherein secret mood, be a kind of common teaching pattern.Yet the magnetic suspension principle demonstration device in middle and primary schools laboratory lacks at present, and the magnetic levitation terrestrial globe is arranged on the market, and demonstration levitated object (fixed mode) is single, does not have dirigibility, and poor effect, can not reach the teaching purpose of expection.I applied for two utility model patents in 2012 in this respect, a name is called " one kind of multiple object magnetic suspension principle demonstrators ", the application the patent No. be 201220266401.X its remedied disadvantages of background technology, can demonstrate that magnetic levitation terrestrial globe, magnetic levitation aircraft, kid are floated aloft etc. (as long as the weight suitable object just can be selected, the suitable permanent magnet demonstration that just can suspend in the stickup), versatile and flexible, it is simple in structure, easy to use, the teaching demonstration effect is good.Another name is called " demonstrator that magnetic levitation object height degree is variable ", and the patent No. of application is 201220318138.2.The height of the suspension of this magentic suspension demonstrating instrument demonstration can change by the worktable upper knob, and it is simple in structure, and is easy to use, and the teaching demonstration effect is better.
Prior art on the basis that combines above two patented technologies, exists still that suspension weight is too little, suspension effect is directly perceived and the cost technical problems of high.
Summary of the invention
The object of the present invention is to provide a kind of high voltage control magnetic levitation demonstration instrument for teaching, it has adopted the coil high voltage supply, has reduced cost and the body weight of demonstration device, has strengthened the weight of suspension; Increased and to have made the automatically function of (positive hour hands or inhour) rotation of suspension, made more directly perceived, the science, more advanced more of demonstration device.
Technical solution of the present invention is:
A kind of high voltage control magnetic levitation demonstration instrument for teaching, comprise a support, the upper end of described support arranges control enclosure, described control enclosure below places the suspension of rotation, and the top of described suspension arranges permanent magnet, and described control enclosure connects a working controller, described working controller comprises the high-tension coil working power, amplifying triode, switch triode, low-voltage supply, signal amplifier; Described high-tension coil working power adopts the 220V alternating current directly by the diode bridge rectification, and the filtering of 450V electrochemical capacitor obtains the direct current of nearly 300V, and the 300V direct current also supplies amplifying triode, switch triode work; Described low-voltage supply adopts the transformer step-down of output 17v voltage, and the filtering of 2200UF electrolytic condenser is that Hall element OH3503 and signal amplifier work are supplied with in 7812 and 7805 three terminal regulator voltage stabilizing respectively by model;
Its special character is: described control enclosure comprises high voltage main coil, and iron core in the high voltage main coil is set, be arranged at the high voltage main coil bottom with its mix around auxiliary winding, described high voltage main coil bottom is provided with Hall element OH3503; Described high voltage main coil adopts 0.73 enameled wire around 11500 circle formation, and described auxiliary winding adopts 0.21 enameled wire mixed around formation by main winding bottom and its around 3000 circles, accounts for height 2/5 position of main coil integral body.
Above-mentioned control box also comprises the fan to the high voltage main coil heat radiation, and described fan is arranged on the shell of control enclosure one side.
The invention has the beneficial effects as follows:
1) coil adopts high voltage supply, has reduced cost and the body weight of demonstration device, has strengthened power, has strengthened the weight of suspension, the object of the 2500g that can suspend;
2) set up one group of secondary coil effect and can make suspension (positive hour hands or inhour) rotation automatically, strengthened the demonstration effect;
3) suspension adjustable height, adjustment control are that suspension off-line circle is apart from changing between the 60-105mm.
4) but weight suspension at 2500g inner volume diameter at 1.2m (doing big suspension volume as support can also increase) with interior any object.
Description of drawings
Fig. 1 is work schematic block diagram of the present invention;
Fig. 2 connects schematic block diagram for electrical equipment of the present invention;
Fig. 3 is structural representation of the present invention;
Fig. 4 connects schematic block diagram for control enclosure of the present invention;
Fig. 5 is working controller schematic block diagram of the present invention.
Drawing reference numeral explanation: 1-box body; The 2-high-tension coil; The 3-small fan; 4-high-tension coil+auxiliary winding; The 5-iron core; The 6-Hall element; 7-high-pressure work power supply; The 8-high-voltage amplifier; The 9-low-voltage supply; The 10-signal amplifier; The indication of 11-gauge tap.
Embodiment
Referring to Fig. 4, the enameled wire of employing 0.73 is around 11500 circles, add iron core 5, auxiliary winding 4 adopt 0.21 enameled wire around 3000 circles near main winding 2 bottoms and its mixed around, coil bottom is provided with Hall element 6, is contained in jointly in control tub 1, and tub shell on one side is provided with small fan 3, small fan work is dispelled the heat to coil
Referring to Fig. 5, contain high-pressure work power supply 7 (for coil, switch and amplifying triode 8 work; Low-voltage supply 9 adopts the miniature transformer step-down of output 17v voltage, and the filtering of 2200UF electrolytic condenser is supplied with Hall element OH3503, triode, amplifier integrated package LM393, small fan work by the three terminal regulator voltage stabilizing.The coil working reometer, four gauge tap, two diodes are indicated and potential regulator, in the working controller box body 1 of packing into jointly.
This demonstration device utilizes the interaction between the ferromagnetic controllability of electromagnetism and permanent magnetism, cooperates sensor and electronic circuit to realize the object skyborne function that suspends.Referring to Fig. 1, when coil feeds direct current, be the S utmost point if to be N extremely following in the polarity of the magnetic field top of its generation.The permanent magnet that the object that is suspended is pasted above also has magnetic field to work as when the top N of being is extremely following to be the S utmost point, suspension (magnet in the above) level is made progress slowly near coil bottom, they just have mutual attractive force (there is a natural attraction between the sexes), the object that is suspended is gradually upwards near air core coil, the Hall element OH3503 that is in air core coil bottom slowly increases the voltage exported along with rising owing to sensing permanent-magnetic field, when suspension when the air core coil certain distance, the high voltage of Hall element OH3503 output makes the not working coil outage of amplifier comparer LM393 output LOW voltage triode power amplifier switch, the magnetic field of coil disappears to be fallen by suspension, Hall element OH3503 because of the voltage exported of field weakening of induction along with reduction, the low-voltage of exporting as Hall element OH3503 makes the energising of amplifier comparer LM393 output HIGH voltage triode power amplifier switch working coil, coil has generation magnetic field, have upwards to attract suspension, like this work that can be reciprocal.Because the resolution of LM393 voltage comparator is high especially, its positive-negative input end makes air core coil energising and outage as long as variant slightly output terminal will be high voltage or low-voltage, the result just forms suspension and does not namely increase at a certain height and also be unable to come down, and skyborne phenomenon can only suspend.When object is suspended in when aerial, the magnetic force direction that high-tension coil contains the magnetic field that auxiliary winding produces can be switched by the switch of working controller panel setting be made by suspension by the positive hour hands of certain speed or inhour rotation automatically, and the work signal is referring to Fig. 2.
Development process: referring to Fig. 3, high voltage control magnetic suspension principle demonstrator comprises 1, door shaped stent connects, and adopts stainless steel material to make, and following pipe the inside dress sand requires to have certain stability.
Control enclosure: referring to Fig. 4, high-tension coil 2 (master), the enameled wire of employing 0.73 is around 11500 circles, add iron core 5, high-tension coil+auxiliary winding 4 adopt 0.21 enameled wire around 3000 circles near main winding 2 bottoms and its mixed around, coil bottom is provided with Hall element 6, is contained in jointly in tub 1, tub is provided with small fan 3, and small fan work is dispelled the heat to coil.
Working controller: referring to Fig. 5, (adopt the 220V alternating current directly by the diode bridge rectification, the filtering of 450V electrochemical capacitor obtains the direct current of nearly 300V, for coil, high-voltage amplifier work 8 to contain high-pressure work power supply 7; Low-voltage supply 9 adopts the miniature transformer step-down of output 17v voltage, and the filtering of 2200UF electrolytic condenser is supplied with Hall element OH3503, triode, amplifier integrated package LM393, signal amplifier 10, small fan work by the three terminal regulator voltage stabilizing.The coil working reometer, four gauge tap, two diodes are indicated and potential regulator 11, in the box body 1 of packing into jointly.
Claims (2)
1. high voltage control magnetic levitation demonstration instrument for teaching, comprise a support, the upper end of described support arranges control enclosure, described control enclosure below places the suspension of rotation, and the top of described suspension arranges permanent magnet, and described control enclosure connects a working controller, described working controller comprises the high-tension coil working power, amplifying triode, switch triode, low-voltage supply, signal amplifier; Described high-tension coil working power adopts the 220V alternating current directly by the diode bridge rectification, and the filtering of 450V electrochemical capacitor obtains the direct current of nearly 300V, and the 300V direct current also supplies amplifying triode, switch triode work; Described low-voltage supply adopts the transformer step-down of output 17v voltage, and the filtering of 2200UF electrolytic condenser is that Hall element OH3503 and signal amplifier work are supplied with in 7812 and 7805 three terminal regulator voltage stabilizing respectively by model;
It is characterized in that: described control enclosure comprises high voltage main coil, and iron core in the high voltage main coil is set, be arranged at the high voltage main coil bottom with its mix around auxiliary winding, described high voltage main coil bottom is provided with Hall element OH3503; Described high voltage main coil adopts 0.73 enameled wire around 11500 circle formation, and described auxiliary winding adopts 0.21 enameled wire mixed around formation by main winding bottom and its around 3000 circles, accounts for height 2/5 position of main coil integral body.
2. according to the described high voltage control magnetic levitation of claim 1 demonstration instrument for teaching, it is characterized in that: described control enclosure also comprises the fan to the high voltage main coil heat radiation, and described fan is arranged on the shell of control enclosure one side.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102258051A CN103268725A (en) | 2013-06-06 | 2013-06-06 | High-voltage control magnetic suspension teaching demonstration instrument |
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| CN2013102258051A CN103268725A (en) | 2013-06-06 | 2013-06-06 | High-voltage control magnetic suspension teaching demonstration instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030199A (en) * | 2019-03-29 | 2019-07-19 | 张则羿 | It is a kind of that the floating rotary system of aspiration-type magnetic is often led based on magnechuck |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20130828 |