CN204576928U - Ampère law and electromagnetic damping integrated demonstration experimental instrument - Google Patents
Ampère law and electromagnetic damping integrated demonstration experimental instrument Download PDFInfo
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- CN204576928U CN204576928U CN201520295962.4U CN201520295962U CN204576928U CN 204576928 U CN204576928 U CN 204576928U CN 201520295962 U CN201520295962 U CN 201520295962U CN 204576928 U CN204576928 U CN 204576928U
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Abstract
Ampère law and electromagnetic damping integrated demonstration experimental instrument, belong to Ampère law demonstration instrument technical field.The utility model is to solve the relevant demonstration instrument of the electromagnetism that relates in existing teaching, can only the existence of verifying electromagnetic phenomenon, and cannot embody the problem of the variation relation of each physical quantity.Its direct supply, amp gauge, timer, o, two single-pole triple-throw (SPTT) switches, circuit protecting switch become series loop with resistor group; Every side of o arranges a single-pole triple-throw (SPTT) switch respectively, and each single-pole triple-throw (SPTT) switch connects terminals in three terminals of homonymy o, and the terminals correspondence of the both sides of two single-pole triple-throw (SPTT) switch connections is identical; O is arranged on the base of adjustable metal support, and metal yaw is suspended on the end of adjustable metal support by cycloid, and metal yaw is in the center of o inside.The utility model is used for teaching demonstration.
Description
Technical field
The utility model relates to Ampère law and electromagnetic damping integrated demonstration experimental instrument, belongs to Ampère law demonstration instrument technical field.
Background technology
Ampère law is one of most important law of relation between reflection electricity and magnetic, below formula (1) and formula (2) be the mathematical expression form of Ampère law and Biot laws respectively:
For solenoid, the electromagnetic intensity B of its endless (length l and diameter d ratio l/d > 10) cylinder interior is:
B＝μ
0nI， (3)
Wherein, μ
0for permeability of vacuum, n is the coil turn in solenoidal unit length, and I is every circle electric current.
And for there being the solenoid of magnetic core, the size of its permeability of vacuum changes along with the difference of magnetic core.When conductor moves in the magnetic field changed, can produce eddy current and cause conductor to be subject to Ampère force, the direction of Ampère force always hinders the motion of conductor, and this phenomenon is called electromagnetic damping.Relate in the relevant demonstration instrument of electromagnetism in current college physics teaching, the demonstration instrument of not shaping Ampère law; And the eddy current damping of existing teaching pendulum, the existence of vortex phenomenon can only be verified, do not show each physical quantity as μ
0, I and n affect size to experiment effect.
Summary of the invention
The utility model object is to solve the relevant demonstration instrument of the electromagnetism that relates in existing teaching, can only the existence of verifying electromagnetic phenomenon, and the problem of the variation relation of each physical quantity cannot be embodied, provide a kind of Ampère law and electromagnetic damping integrated demonstration experimental instrument.
Ampère law described in the utility model and electromagnetic damping integrated demonstration experimental instrument, it comprises direct supply, amp gauge, timer, o, two single-pole triple-throw (SPTT) switches, circuit protecting switch, adjustable metal support, metal yaw and resistance;
Direct supply, amp gauge, timer, o, two single-pole triple-throw (SPTT) switches, circuit protecting switch become series loop with resistor group;
O is the o of replaceable magnetic core, the both sides of o respectively correspondence have A, B, C tri-terminals, these three terminals correspond respectively to the different coil turns of o, every side of o arranges a single-pole triple-throw (SPTT) switch respectively, each single-pole triple-throw (SPTT) switch connects terminals in three terminals of homonymy o, and the terminals correspondence of the both sides of two single-pole triple-throw (SPTT) switch connections is identical;
O is arranged on the base of adjustable metal support, and metal yaw is suspended on the end of adjustable metal support by cycloid, and metal yaw is in the center of o inside.
The concrete connection of described series loop is:
The positive pole feeder ear of direct supply is connected the stiff end of a single-pole triple-throw (SPTT) switch successively with timer by amp gauge, the negative pole feeder ear of direct supply is connected the stiff end of another single-pole triple-throw (SPTT) switch successively with resistance by circuit protecting switch.
Described metal yaw is nonmagnetic metal yaw.
Cycloid is aluminium alloy cycloid.
Advantage of the present utility model: the utility model is the demonstration instrument of college physics teaching, its electromagnetic damping correlation parameter is adjustable, can change μ
0, the physical quantity such as I and n, and reflect the impact of each physical quantity variation on experimental result by electromagnetic damping phenomenon macroscopic view, thus judge the size variation of induced field B; The size of its electromagnetic damping power embodied by the pendulum time of metal yaw.
The utility model in use, by the experimental technique of control variable, by regulating the control of direct supply realization to size of current, the change of single-pole triple-throw (SPTT) Switch Controller unit length coil turn n, the replacing of different magnetic core in o, magnetic permeability is changed, pass through adjustable metal support again to the change of metal yaw height, the cutting-height of cycloid is changed, by the duration of oscillation length of timer record cycloid, each parameter that reflects of qualitative macroscopic view affects size to experimental result, thus judge the size variation of induced field B, clearly can verify Ampère law and observe electromagnetic damping phenomenon, it tests successful.Meanwhile, the utility model has portability, dismounting and conveniently moving.Above-mentioned magnetic core is iron or silicon steel core.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of Ampère law described in the utility model and electromagnetic damping integrated demonstration experimental instrument;
Fig. 2 is the placing structure schematic diagram of o and adjustable metal support;
Fig. 3 is the structural representation of cycloid;
Fig. 4 is the structural representation of not jag metal yaw;
Fig. 5 is the structural representation of jag metal yaw;
Fig. 6 is the schematic diagram of o three terminals.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1 to Fig. 6, Ampère law described in present embodiment and electromagnetic damping integrated demonstration experimental instrument, it comprises direct supply 1, amp gauge 2, timer 3, o 4, two single-pole triple-throw (SPTT) switches 5, circuit protecting switch 6, adjustable metal support 7, metal yaw 8 and resistance 9;
Direct supply 1, amp gauge 2, timer 3, o 4, two single-pole triple-throw (SPTT) switches 5, circuit protecting switch 6 and resistance 9 form series loop;
O 4 is the o of replaceable magnetic core, the both sides of o 4 respectively correspondence have A, B, C tri-terminals, these three terminals correspond respectively to the different coil turns of o, every side of o 4 arranges a single-pole triple-throw (SPTT) switch 5 respectively, each single-pole triple-throw (SPTT) switch 5 connects terminals in three terminals of homonymy o 4, and the terminals correspondence of the both sides of two single-pole triple-throw (SPTT) switch 5 connections is identical;
O 4 is arranged on the base of adjustable metal support 7, and metal yaw 8 is suspended on the end of adjustable metal support 7 by cycloid, and metal yaw 8 is in the center of o 4 inside.
In present embodiment, direct supply 1 is 0 ~ 36V adjustable DC power supply, and adjustable metal support 7 can regulate and control bearing height up and down; Resistance 9 is for circuit protection; Amp gauge 2 is for observing the size of current in circuit; Timer 3 is automatically controlled timer, and be responsible for record metal yaw 8 by same position, namely same angle is lowered into the time stopped swinging, timer 3 have electric current by time start timing, shutdown transient stops timing immediately; In the middle of the cross bar that described cycloid can be fixed on above adjustable metal support 7 in draw-in groove, it makes metal yaw 8 be in center between o 4; Single-pole triple-throw (SPTT) switch 5 is selected to connect A, B or C terminals respectively, and the unit length interior loop number of turn that the o 4 connecting into circuit loop is comprised is different, realizes the function of the adjustable coil unit length number of turn of o 4 thus.
Embodiment two: present embodiment is described below in conjunction with Fig. 1, present embodiment is described further embodiment one, and the concrete connection of described series loop is:
The positive pole feeder ear of direct supply 1 is connected the stiff end of a single-pole triple-throw (SPTT) switch 5 successively with timer 3 by amp gauge 2, the negative pole feeder ear of direct supply 1 is connected the stiff end of another single-pole triple-throw (SPTT) switch 5 successively with resistance 9 by circuit protecting switch 6.
Embodiment three: present embodiment is described below in conjunction with Fig. 4 and Fig. 5, present embodiment is described further embodiment one or two, and described metal yaw 8 is nonmagnetic metal yaw.
Metal yaw 8 chooses three covers in an experiment, and material is respectively each a set of of aluminium, aluminium alloy and copper.
Metal yaw 8 arranges two kinds of different switches, as shown in Figure 4 and Figure 5.When other experiment conditions are identical, namely the difform yaw of observable is on the impact of experimental result, thus judges the eddy current that produces in different yaw in experimentation.The yaw generation eddy current of the jag shown in Fig. 5 is little, and electromagnetic damping is little, and the time needed when the same amplitude of oscillation is discharged into stopping is long; Otherwise yaw inner eddy current produced when swinging of the not jag shown in Fig. 4 is large, and damping phenomena is obvious, under identical conditions, can stop swinging rapidly; Three kinds of unit length coil turns that o 4 corresponds to A, B, C tri-terminals are defined as n
a, n
b, n
c, wherein n
a<n
b<n
c, connect A, B, C tri-terminals by single-pole triple-throw (SPTT) switch 5 is empirically required, observe different unit length coil turn to the impact of experimental result.When other conditions are constant, the number of turn in unit length is larger, and according to Ampère law, the Induced magnetic field produced in solenoid is larger, and the eddy current produced in yaw is larger, and damping is stronger.
Embodiment four: present embodiment is described further embodiment one, two or three, cycloid is aluminium alloy cycloid.
Principle of work: by the formula of three in background technology, the control to size of current I is realized respectively by adjustment direct supply 1, the adjustment to unit length coil turn is realized by single-pole triple-throw (SPTT) switch 5, by the magnetic core changing o 4, magnetic permeability is changed, such as soft iron or silicon steel core, the adjustment of the cycloid cutting-height to hanging metal yaw 8 is realized by adjustable metal support 7, keep the amplitude of oscillation of every trochoid identical when testing and use control variate method, regulate each physical quantity respectively, the duration of oscillation of metal yaw 8 is recorded by timer 3, the length of duration of oscillation can qualitative macroscopic view reflect that each parameter is as electric current, the unit length interior loop number of turn, the basic concepts such as magnetic permeability and cycloid cutting-height are on the size that affects of experimental result, the utility model is probed into electric current I, the unit length interior loop number of turn, different magnetic permeability respectively by control variate method and the cutting-height of cycloid of nonmagnetic metal yaw and difformity aluminium alloy cycloid is housed to the macroscopic effects of electromagnetic damping phenomenon, thus judge the size variation of magnetic flux, and then demonstrate Ampère law and significantly observe electromagnetic damping phenomenon.
Claims (4)
1. an Ampère law and electromagnetic damping integrated demonstration experimental instrument, it is characterized in that, it comprises direct supply (1), amp gauge (2), timer (3), o (4), two single-pole triple-throw (SPTT) switches (5), circuit protecting switch (6), adjustable metal support (7), metal yaw (8) and resistance (9);
Direct supply (1), amp gauge (2), timer (3), o (4), two single-pole triple-throw (SPTT) switches (5), circuit protecting switch (6) and the series loops of resistance (9) composition;
The o that o (4) is replaceable magnetic core, the both sides of o (4) respectively correspondence have A, B, C tri-terminals, these three terminals correspond respectively to the different coil turns of o, every side of o (4) arranges a single-pole triple-throw (SPTT) switch (5) respectively, each single-pole triple-throw (SPTT) switch (5) connects terminals in three terminals of homonymy o (4), and the terminals correspondence of the both sides that two single-pole triple-throw (SPTT) switches (5) connect is identical;
O (4) is arranged on the base of adjustable metal support (7), metal yaw (8) is suspended on the end of adjustable metal support (7) by cycloid, and metal yaw (8) is in the inner center of o (4).
2. Ampère law according to claim 1 and electromagnetic damping integrated demonstration experimental instrument, is characterized in that, the concrete connection of described series loop is:
The positive pole feeder ear of direct supply (1) is connected the stiff end of a single-pole triple-throw (SPTT) switch (5) successively with timer (3) by amp gauge (2), the negative pole feeder ear of direct supply (1) is connected the stiff end of another single-pole triple-throw (SPTT) switch (5) successively with resistance (9) by circuit protecting switch (6).
3. Ampère law according to claim 1 and 2 and electromagnetic damping integrated demonstration experimental instrument, is characterized in that, described metal yaw (8) is nonmagnetic metal yaw.
4. Ampère law according to claim 1 and 2 and electromagnetic damping integrated demonstration experimental instrument, is characterized in that, cycloid is aluminium alloy cycloid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520295962.4U CN204576928U (en) | 2015-05-08 | 2015-05-08 | Ampère law and electromagnetic damping integrated demonstration experimental instrument |
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| CN201520295962.4U CN204576928U (en) | 2015-05-08 | 2015-05-08 | Ampère law and electromagnetic damping integrated demonstration experimental instrument |
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| CN204576928U true CN204576928U (en) | 2015-08-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110992790A (en) * | 2019-11-29 | 2020-04-10 | 天津中德应用技术大学 | Magnetic attraction type electromagnetic induction demonstration instrument |
-
2015
- 2015-05-08 CN CN201520295962.4U patent/CN204576928U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110992790A (en) * | 2019-11-29 | 2020-04-10 | 天津中德应用技术大学 | Magnetic attraction type electromagnetic induction demonstration instrument |
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| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20150819 Termination date: 20160508 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |