CN204010457U - The strong and weak experiment instrument of electromagnet magnetic - Google Patents
The strong and weak experiment instrument of electromagnet magnetic Download PDFInfo
- Publication number
- CN204010457U CN204010457U CN201420399188.7U CN201420399188U CN204010457U CN 204010457 U CN204010457 U CN 204010457U CN 201420399188 U CN201420399188 U CN 201420399188U CN 204010457 U CN204010457 U CN 204010457U
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- electromagnet
- iron plate
- spring
- magnetic
- panel
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Abstract
The strong and weak experiment instrument of a kind of electromagnet magnetic, comprise electromagnet, the device for measuring force that can be connected by the iron plate of the magnetic attraction of electromagnet and with iron plate, it is characterized in that: described device for measuring force is by spring, pointer, panel and be configured to, described iron plate is articulated in the lower end of described spring, the upper end of described spring is suspended on stay cord, the end that described stay cord is walked around after fixed pulley is handle end, described fixed pulley is unsettled to be fixed on support, is marked with the big or small scale value of instruction power on described panel.Measure maximum pull when iron plate is pulled away to electromagnet, namely represent magnetic power with the maximum the suction-combining force between electromagnet and iron plate, the elongate space of spring top is large, the changes in amplitude of electromagnet magnetic power in wide range all can be shown clearly, phenomenon is obvious, and experiment success rate is high.The high and low position of panel on support is adjustable, can be by total indicator reading zeroing before energising, and operation and reading are all very convenient.
Description
Technical field
The utility model relates to a kind of physics educational apparatus, is specially the strong and weak experiment instrument of electromagnet magnetic.
Background technology
In existing physics teaching in secondary school, need to probe into by experiment the factor that affects electromagnet magnetic power that draws, the experimental program that textbook is recommended as shown in Figure 1, electromagnet 1 and power supply 6, reometer 7, switch 8, slide rheostat 9 are connected in circuit with wire 10, above electromagnet 1, be placed with the iron block 2 of suspension, iron block 2 is articulated in after being connected with spring 3 on the cross bar 4 of support 5, and the length of extending by spring 3 is surveyed the magnetic power of electromagnet 1.Regulate slide rheostat 9, change the size of electric current, can study the relation of electromagnet magnetic and size of current, change the coil turn in place in circuit, can study the relation between electromagnet magnetic and coil turn.
The open defect that this experiment exists is, be subject to the restriction of spring extended length, the length that the magnetic power of electromagnet may not necessarily be extended by spring 3 reflects, that is to say, the length that spring 3 extends only can reflect that the magnetic of electromagnet in close limit is very strong and weak and change, reason is: in the time that the magnetic of electromagnet is weak, the elongation of spring is several unchanged, need to reduce the position of iron block and spring and experience magnetic force; If the magnetic of electromagnet is stronger, when moving down, iron block 2 touches after electromagnet, and spring without the space of extending, now, if magnetic strengthens again, need be heightened the position of iron block and spring.In experimentation, need to repeatedly adjust the height of iron block and spring, operate pretty troublesome; Particularly existing laboratory power supply is in the time of output heavy current, and output time is slightly grown (as being greater than 8 seconds), will automatically protect power-off, does not adjust the time of height at all.
Therefore, this experiment need to, the complementing one another of the various technical parameters such as the output voltage of the gravity of the suspension height of the coefficient of stiffiness of electromagnet 1, spring 3, spring 3, iron block 2, power supply 6, slide rheostat 9 slide plate positions, could complete reluctantly experiment in the strong and weak very close limit changing of magnetic.But above-mentioned each equipment is the assembling equipment in laboratory, is difficult to select the equipment complementing one another, experiment difficulty is large, weak effect.
Want obviously to reflect the relation between magnetic and size of current and the coil turn of electromagnet, to in larger variation range, change the magnetic power of electromagnet, and to reflect by the larger length variations scope of spring, the larger space that above-mentioned existing experiment obviously can not provide spring to extend, phenomenon is not obvious, and experiment lacks explanation of force.
Utility model content
The problem existing for solving prior art, the utility model provides a kind of electromagnet magnetic strong and weak experiment instrument, require spring to there is sufficiently long elongate space, change to reflect that the magnetic of electromagnet in wide range is strong and weak, thereby phenomenon illustrates the relation between the magnetic of electromagnet strong and weak and size of current and coil turn significantly.
The technical scheme that the utility model adopts is: the strong and weak experiment instrument of a kind of electromagnet magnetic, comprise electromagnet, device for measuring force and the support that can be connected by the iron plate of the magnetic attraction of electromagnet, with iron plate, it is characterized in that: described device for measuring force is made up of spring, pointer and panel, the lower end of described spring articulates described iron plate, the upper end of described spring is suspended on one end of stay cord, the other end that described stay cord is walked around after fixed pulley is handle end, described fixed pulley is unsettled to be fixed on support, is marked with the scale value of instruction power size on described panel.
Described panel can be movably connected on support up or down.
Experimental principle is: in the experimentation of electromagnet energising, the handle end of hand-held stay cord, increases pulling force gradually, until iron plate is pulled away to electromagnet, the maximum pull when reading iron plate and leaving electromagnet, power is larger, the power that shows electromagnetic actuation iron plate is larger, illustrates that the magnetic of electromagnet is stronger; Change the number of turn of size of current and coil, the above-mentioned experimental implementation of reforming, measures the value of multiple maximum pulls, can relatively draw intuitively the relation between the magnetic of electromagnet strong and weak and size of current and coil turn.
The beneficial effects of the utility model are: measure maximum pull when iron plate is pulled away to electromagnet, namely represent the power of magnetic with the maximum the suction-combining force between electromagnet and iron plate, principle is plain, student's easy to understand.Longer elongate space can be reserved in spring top, and measurement range is large, and the changes in amplitude of electromagnet magnetic power in wide range all can be shown clearly, and phenomenon is obvious, and experiment success rate is high, and effect is remarkable.The high and low position of panel on support is adjustable, can be by total indicator reading zeroing before energising, and operation and reading are all very convenient.
Brief description of the drawings
Fig. 1 is the Experimental equipment of prior art;
Fig. 2 is structural representation of the present utility model;
In figure: electromagnet 1, iron block 2, spring 3, cross bar 4, support 5, power supply 6, reometer 7, switch 8, slide rheostat 9, wire 10, iron core 11, iron plate 12, pointer 13, panel 14, fixed pulley 15, stay cord 16, handle end 17.
Embodiment
As shown in Figure 2, electromagnet 1 is placed on the base plate of support 5, on the cross bar 4 of support 5 tops, is fixed with fixed pulley 15, and stay cord 16 is walked around the rear left end of fixed pulley 15 and is hung with spring 3, and stay cord 16 right-hand members are handle end 17.Spring 3 is provided with pointer 13, is vertically connected with panel 14 on support 5, is marked with the big or small scale value of instruction power on panel 14.
For convenient reading, before energising, total indicator reading can be returned to zero, need panel 14 can be movably connected in up or down on support 5, such as adopting chute-type bolt to connect, because this connected mode is prior art, Gu Tuzhong does not draw in detail.
Claims (2)
1. the strong and weak experiment instrument of electromagnet magnetic, comprise electromagnet, the device for measuring force that can be connected by the iron plate of the magnetic attraction of electromagnet and with iron plate, it is characterized in that: described device for measuring force is by spring, pointer, panel and be configured to, described iron plate is articulated in the lower end of described spring, the upper end of described spring is suspended on stay cord, the end that described stay cord is walked around after fixed pulley is handle end, described fixed pulley is unsettled to be fixed on support, is marked with the big or small scale value of instruction power on described panel.
2. the strong and weak experiment instrument of electromagnet magnetic as claimed in claim 1, is characterized in that: described panel can be movably connected on support up or down.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201420399188.7U CN204010457U (en) | 2014-07-20 | 2014-07-20 | The strong and weak experiment instrument of electromagnet magnetic |
Applications Claiming Priority (1)
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CN201420399188.7U CN204010457U (en) | 2014-07-20 | 2014-07-20 | The strong and weak experiment instrument of electromagnet magnetic |
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CN204010457U true CN204010457U (en) | 2014-12-10 |
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CN201420399188.7U Expired - Fee Related CN204010457U (en) | 2014-07-20 | 2014-07-20 | The strong and weak experiment instrument of electromagnet magnetic |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105654816A (en) * | 2016-01-22 | 2016-06-08 | 王义金 | Gravity and friction relationship test device |
CN105699626A (en) * | 2016-03-23 | 2016-06-22 | 济南祺悦农业科技服务有限公司 | Portable soil compactness tester |
CN108182856A (en) * | 2018-03-07 | 2018-06-19 | 刘谏哲 | A kind of multi-faceted pole change demonstration teaching aid |
CN108806428A (en) * | 2018-05-31 | 2018-11-13 | 王强 | A kind of electromagnet teaching experimental provision |
CN110014263A (en) * | 2019-05-22 | 2019-07-16 | 陈佳丽 | A kind of spring elongation apparatus for shaping |
CN113960347A (en) * | 2021-09-09 | 2022-01-21 | 东风汽车集团股份有限公司 | Static dark current testing device and method |
-
2014
- 2014-07-20 CN CN201420399188.7U patent/CN204010457U/en not_active Expired - Fee Related
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105654816A (en) * | 2016-01-22 | 2016-06-08 | 王义金 | Gravity and friction relationship test device |
CN105699626A (en) * | 2016-03-23 | 2016-06-22 | 济南祺悦农业科技服务有限公司 | Portable soil compactness tester |
CN108182856A (en) * | 2018-03-07 | 2018-06-19 | 刘谏哲 | A kind of multi-faceted pole change demonstration teaching aid |
CN108806428A (en) * | 2018-05-31 | 2018-11-13 | 王强 | A kind of electromagnet teaching experimental provision |
CN110014263A (en) * | 2019-05-22 | 2019-07-16 | 陈佳丽 | A kind of spring elongation apparatus for shaping |
CN113960347A (en) * | 2021-09-09 | 2022-01-21 | 东风汽车集团股份有限公司 | Static dark current testing device and method |
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Legal Events
Date | Code | Title | Description |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20150720 |
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EXPY | Termination of patent right or utility model |