CN213211446U - Demonstration experiment device for alternating current and direct current power generation principle - Google Patents
Demonstration experiment device for alternating current and direct current power generation principle Download PDFInfo
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- CN213211446U CN213211446U CN202021826546.XU CN202021826546U CN213211446U CN 213211446 U CN213211446 U CN 213211446U CN 202021826546 U CN202021826546 U CN 202021826546U CN 213211446 U CN213211446 U CN 213211446U
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Abstract
The utility model discloses an experimental device for demonstrating the alternating current and direct current power generation principles, which comprises a support frame, a coil framework, a light-emitting mechanism, an irradiation device, a reversing device and two magnet groups, wherein the coil is sleeved on the coil framework, and the coil is used for generating induced current; the light-emitting mechanism comprises four diode groups, the four diode groups are arranged on two sides of the coil in pairs, each diode group comprises a plurality of light-emitting diodes, the plurality of light-emitting diodes in each diode group are connected in series, the directions of the positive and negative electrodes are the same, the two diode groups on the same side are connected in parallel, and the positive and negative electrodes of the two diode groups on the same side are opposite and have different brightness colors; the direction of the magnetic induction line is simulated by the irradiation device, the induced current is changed into direct current from alternating current by the reversing device, and the technical problems in the prior art are solved, such as: the direction and the magnetic flux change of the magnetic induction lines and the periodic change of the magnitude and the direction of the alternating current generated by the coil cannot be intuitively demonstrated.
Description
Technical Field
The utility model relates to a power generation principle teaching demonstration field is a demonstration experimental apparatus of interchange and direct current power generation principle particularly.
Background
In the middle school physics teaching, the analysis of the working principle of the alternating current-direct current generator is one of important teaching contents of high school physics electromagnetism, and the study of the working principle of the alternating current-direct current generator aims to enable students to use the learned knowledge of electromagnetic induction, Lenz's law, right-hand rule and the like to solve some practical problems related to alternating current and direct current in life, so that the students can learn to move from life to physics and from physics to society and arouse the interest of the students in learning physics. However, in practical teaching, because the teaching materials are relatively simple to compile, the teaching materials only stay in theoretical level analysis, and for high-school students with weak autonomous learning ability, the change rule of the size and the direction of the alternating current is difficult to understand, most students only know that the size and the direction of the alternating current can change, but the specific change rule and the principle are not completely understood, and especially the rule of the change of the current direction is more difficult to understand. Because the change of the alternating current is invisible and unknown, if no proper demonstration experimental device is provided for creating a physical scene for students in actual teaching, only a teacher can speak and understand the situation according to the imagination of the students, and perceptual knowledge cannot be formed, so the actual teaching effect is not ideal. How to let students autonomously explain the generation of alternating current by using learned electromagnetic knowledge and deeply understand the change rule of the alternating current direction and the magnitude is the teaching key point of the knowledge of the alternating current generator principle and is also an important ruler for measuring the teaching effect of the knowledge.
At present, a plurality of experimental devices for demonstrating the alternating current and direct current power generation principle are provided, and most hand generators are used in physics teaching of middle school, but the magnitude of induced electromotive force of the generator cannot be intuitively demonstrated until now because two effective sides of a coil cut magnetic lines of force to generate the induced electromotive force. Patent No. CN201610906946.3 discloses an alternator principle demonstration instrument, and the instrument includes show board, coil, LED flowing water lamp, pivot, control circuit. The technical scheme that this patent was taken is at show board hollow position and is provided with the coil, the coil can be rotatory around the center pin, is provided with LED flowing water lamp on the coil, control circuit comprises hall inductive switch module, flowing water lamp control module two parts. The demonstration instrument demonstrates the change of current by adopting the LED water lamp, controls the LED water lamp through the induction switch module, changes the flowing direction of the LED water lamp according to the angle relation between the coil and the magnetic field, and demonstrates the relation between the magnetic flux change and the induction current direction. In addition, a paper of 'improvement of hand generator experiment' is published in 'physics teacher' 2019, 2 nd, the improved method is that a Faraday electromagnetic induction demonstration instrument is used to replace an alternating current generator so as to realize the uniform rotation of a coil, generate a uniform magnetic field and regulate and control the rotation angular speed of the coil, and a DIS digital information system (a voltage sensor, a data acquisition unit and a computer) is connected to an output end of induced electromotive force so as to realize the observation of the periodic change of the size and the direction of alternating current in a loop and images at any time. In addition, a self-made LED lamp panel is used for simulating the magnetic induction lines of the uniform magnetic field so as to observe the change of the magnetic flux when the coil rotates. The size of the induced electromotive force in the coil of the alternating current-direct current generator is caused by the change of the magnetic flux in the coil, in the article of 'improvement of the hand generator experiment', a Faraday electromagnetic induction demonstration instrument is used for replacing an alternating current generator, structurally, the difference between the alternating current generator and the alternating current generator is inconvenient for students to visually feel the internal structure of the generator, a self-made LED lamp panel is used for simulating the magnetic induction line of a uniform magnetic field to observe the change of the magnetic flux when the coil rotates, but the change condition of the magnetic flux in the plane of the coil cannot be visually and intuitively demonstrated. The same technical problem is also found in patent CN 201610906946.3.
The utility model discloses a main purpose is overcome some technical defect of existing alternating current-direct current generator presentation device and be not enough just can be better, demonstrate more directly perceivedly the observation of the size of alternating current, the periodic variation of direction and image in the generator coil, also can observe the corresponding relation that the size and the direction change of induction electromotive force and the effective limit cutting magnetic induction line of coil change in the coil directly perceivedly simultaneously. The demonstration appearance mainly adopts the preparation of organic glass board can let the student clear observe the inner structure of generator and the magnetic induction line direction that magnet produced, lets the student know more deeply to the physical sight of alternating current-direct current generator structure.
In summary, the prior art has the following: the technical problems that the direction and the magnetic flux change of the magnetic induction lines and the periodic change of the size and the direction of alternating current generated by the coil cannot be intuitively demonstrated.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, the present invention is directed to: the utility model provides a demonstration experimental apparatus of interchange and direct current electricity generation principle, can demonstrate the inside overall structure of alternating current-direct current generator well, the magnetic flux changes, the size of the line direction of magnetic induction that the magnet produced and the alternating current who produces in the generator coil, the periodic variation condition of direction for solve the technical problem that exists among the prior art, if: the direction and the magnetic flux change of the magnetic induction lines and the periodic change of the magnitude and the direction of the alternating current generated by the coil cannot be intuitively demonstrated.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
a demonstration experiment device for alternating current and direct current power generation principles comprises a support frame, a coil framework, a light-emitting mechanism, an irradiation device, a reversing device and two magnet groups, wherein the coil is sleeved on the coil framework, the coil framework is rotatably arranged in the support frame, the two magnet groups are both arranged in the support frame, and the coil is used for rotating to cut a magnetic induction line between the two magnet groups and generate induction current;
the light-emitting mechanism comprises four diode groups, the four diode groups are arranged on two sides of the coil in pairs, each diode group comprises a plurality of light-emitting diodes, the plurality of light-emitting diodes are connected with the coil to form a loop, the plurality of light-emitting diodes in each diode group are connected in series, the directions of the positive electrode and the negative electrode of the light-emitting diodes are the same, the two diode groups on the same side are connected in parallel, the directions of the positive electrode and the negative electrode of the two diode groups on the same side are opposite, and the brightness and the color of the two diode groups on the same;
the irradiation direction of irradiation device faces coil skeleton, irradiation device is used for shining the direction with simulation magnetic induction line on the coil skeleton, the switching-over device set up in one side of coil output end, the switching-over device is used for making the induced current that the coil produced becomes the direct current from the alternating current.
Further, still include the glass board, coil skeleton with the parallel both sides of coil are fixed connection two respectively the glass board, the glass board with diode group all with the rotation axle center of coil is parallel, the glass board is kept away from one side of coil skeleton is pasted with dull polish glass paper.
Furthermore, the irradiation device is a starry laser pen, and the projection of the starry laser pen on the glass plate is used for displaying the direction of the magnetic induction lines and reflecting the magnitude of the induced electromotive force.
Furthermore, the reversing device comprises a commutator bar, an A electric brush and a B electric brush, the commutator bar is arranged between the A electric brush and the B electric brush, the commutator bar is connected with two output ends of the coil, the A electric brush and the B electric brush are both rotationally connected with the commutator bar, and the commutator bar is used for enabling the coil to output alternating current or direct current.
Further, the A electric brush and the B electric brush are connected with a voltmeter in parallel.
Further, still include motor and insulator spindle, the motor is fixed to be set up on the support frame, the support frame middle part is provided with the installation cavity, coil skeleton set up in the installation cavity of support frame, motor rotation axis connection one side of coil skeleton, coil skeleton's opposite side fixed connection the insulator spindle, the insulator spindle is rotationally connected the support frame just extends the support frame, the insulator spindle extends the one end fixed connection of support frame the commutator segment, the A brush with the B brush is all connected the support frame.
Further, magnet group includes the magnet that a plurality of set up side by side, two magnet group set up respectively in the upper and lower both sides and the fixed connection of coil the support frame, a plurality of upper and lower both sides the vertical distribution of magnetic induction line and the perpendicular to that magnet formed the rotation axle center of coil.
Compared with the prior art, the utility model, following beneficial effect has:
1. when the coil rotates to cut the magnetic induction line and generate induction current, and when the reversing device enables the coil to output alternating current, the direction of the induction current generated by the coil is changed periodically, when the direction of the induction current is changed, the light color emitted by the light emitting diodes on the coil is changed periodically, and the light emitting brightness is different according to the difference of magnetic flux, when the reversing device enables the coil to output direct current, the direction of the induction current generated by the coil is unchanged, the illumination color emitted by the light emitting diodes is unchanged and is the same color, and the beneficial effect of conveniently and intuitively demonstrating the change of the magnetic flux and the periodic change of the size and the direction of alternating current generated by the coil is achieved.
2. The irradiation direction of the starry laser pen faces the coil framework, and the patterns are formed on the frosted glass paper of the glass plate, as shown in the figure, the starry laser pen irradiates the glass plate, the irradiated patterns are in the shapes of arrows facing downwards in multiple directions, the directions of the arrows can be adjusted, the arrows are identical to the directions of the magnetic induction lines, and the beneficial effect of conveniently and visually demonstrating the directions of the magnetic induction lines is achieved.
3. When the laser arrow projection is irradiated on the glass plate, when the glass plate is parallel to the irradiation projection of the laser pen bracket, namely the coil, the area is the smallest, the glass plate looks darkest, and the laser arrow cannot be seen on the glass plate, so that the size of the induced electromotive force in the coil can be judged according to the change of the brightness and the irradiation area of the laser arrow, the area and the brightness of the projection which can be irradiated on the glass plate by the laser pen bracket are achieved, and the beneficial effect of indirectly judging the size of the induced electromotive force in the coil is achieved
Drawings
FIG. 1 is an overall structure diagram of an experimental device for demonstrating the AC and DC power generation principles of the present invention;
FIG. 2 is a schematic side view;
FIG. 3 is a schematic view of a commutator segment;
fig. 4 is a schematic diagram of the connection of the coil and the light emitting diode.
List of reference numerals
The laser pen comprises a base 1, a support frame 2, a binding post 3, a coil frame 4, a coil 5, a brush 6-A, a commutator segment 7, a brush 8-B, a magnet 9, a light-emitting diode 10, abrasive paper 11, a coupler 12, a motor 13, a speed adjusting device 14, a starry sky laser pen 15 and a laser pen support 16.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings 1-4, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, an integral connection, or a detachable connection; may be communication within two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention in specific situations.
A demonstration experiment device for alternating current and direct current power generation principles comprises a support frame 2, a coil 5, a coil framework 4, a light-emitting mechanism, an irradiation device, a reversing device and two magnet groups, wherein the coil 5 is sleeved on the coil framework 4, the coil framework 4 is rotatably arranged in the support frame 2, the two magnet groups are both arranged in the support frame 2, and the coil 5 is used for rotating to cut a magnetic induction line between the two magnet groups and generate induction current;
the light-emitting mechanism comprises four diode groups, the four diode groups are arranged on two sides of the coil 5 in pairs, each diode group comprises a plurality of light-emitting diodes 10, the plurality of light-emitting diodes 10 are connected with the coil 5 to form a loop, the plurality of light-emitting diodes 10 in each diode group are connected in series, the directions of the positive electrode and the negative electrode are the same, the two diode groups on the same side are connected in parallel, the directions of the positive electrode and the negative electrode of the two diode groups on the same side are opposite, and the brightness and the color are different;
the irradiation direction of the irradiation device faces the coil framework 4, the irradiation device is used for irradiating the coil framework 4 so as to simulate the direction of magnetic induction lines, the reversing device is arranged on one side of the output end of the coil 5, and the reversing device is used for enabling the induced current generated by the coil 5 to be changed from alternating current to direct current.
As shown in fig. 1, the coil 5 is wound on the bobbin 4, and the coil 5 rotates in the magnetic field to cut the magnetic induction line, and the led 10 emits light due to the induced current generated by the coil connected to the led 10.
The light emitting diodes 10 in the two diode groups disposed on the same side of the coil 5 are red light diodes and yellow light diodes, respectively, as shown in fig. 4, the light emitting diodes 10 in the figure are located from top to bottom, the light colors of the light emitting diodes 10 in the diode groups are red light diodes, yellow light diodes and red light diodes in sequence, that is, the light emitting diodes 10 with the same light emitting color on different sides are connected in series, the power directions of the light emitting diodes 10 with different colors are opposite, and the two diode groups on the same side are connected in parallel.
When the coil 5 rotates to cut the magnetic induction line and generate an induced current, and when the coil 5 outputs an alternating current by the reversing device, the direction of the induced current generated by the coil 5 is periodically changed, when the direction is changed, the connection relation of the light emitting diodes 10 shows that the light color emitted by the light emitting diodes 10 on the coil 5 is changed along with the change of the direction, and the light color is changed periodically according to the difference of the magnetic flux, the brightness of the light is different, when the coil 5 outputs direct current by the reversing device, the direction of the induced current generated by the coil 5 is not changed, the color of the illumination emitted by the light emitting diode 10 is not changed and is the same color, according to the different rotation directions of the coil 5, the illumination colors emitted by the light emitting diodes 10 are different, so that the beneficial effect of conveniently and visually demonstrating the magnetic flux change and the periodic change of the size and the direction of the alternating current generated by the coil is achieved.
In addition, emitting diode 10 is current conventional technology, and this technical field personnel of its and coil 5 erection joint mode can realize completely, the utility model discloses do not relate to so no longer describe again to emitting diode 10's transformation.
Further, still include glass board 11, coil skeleton 4 with the both sides that coil 5 is parallel are fixed connection two respectively glass board 11, glass board 11 with the diode group all with coil 5's rotation axle center is parallel, glass board 11 keeps away from one side of coil skeleton 4 is pasted with ground glass paper.
Further, the irradiation device is a starry laser pointer 15, and the projection of the starry laser pointer 15 on the glass plate 11 is used for displaying the direction of the magnetic induction lines and reflecting the magnitude of the induced electromotive force.
As shown in fig. 2, the bottom of the starry laser pen 15 is provided with a laser pen support 16, the starry laser pen 15 is arranged on the laser pen support 16, the irradiation direction of the starry laser pen 15 faces the coil skeleton 4 and irradiates the frosted glass paper of the glass plate 11 to form a pattern, as shown in fig. 1, the starry laser pen 15 irradiates the glass plate 11, the irradiated pattern is in the shape of a plurality of downward arrow heads, and the arrow heads can be adjusted to have the same direction as the magnetic induction lines, so that the beneficial effect of conveniently and intuitively demonstrating the direction of the magnetic induction lines is achieved.
Furthermore, since the "arrow" is formed by projecting the laser beam on the plane of the coil 5, when the glass plate 11 rotates with the coil bobbin 4, the shape of the "arrow" changes, and the laser beam irradiates the coilThe emitting area and brightness are different, when the glass plate 11 is parallel to the magnetic induction line, i.e. the plane of the coil 5 is parallel to the magnetic induction line, the two effective edges of the coil 5 cut the magnetic induction line with the maximum cutting speed v1, v is the maximum1Vssin θ ═ vssin ω t (θ is the angle between the plane of the coil 5 and the neutral plane, V is the linear velocity of the coil 5), and the induced electromotive force E ═ E generated in the coil 5msin ω t (where EmNBS ω), it can be derived from the above two equations that when the plane of the coil 5 is parallel to the magnetic induction line, the area of the glass plate 11 irradiated by the projection of the laser "arrow" is the largest, the glass plate 11 looks brightest, and the induced electromotive force is the largest. When the glass plate 11 is perpendicular to the magnetic induction lines, that is, the plane of the coil 5 is perpendicular to the magnetic induction lines, that is, two effective sides of the coil 5 are on the neutral plane, when θ is 0, the direction of the effective side of the coil cutting the magnetic field is consistent with the direction of the magnetic induction lines, and when the effective side of the coil does not cut the magnetic induction lines, that is, v is parallel to the direction of the magnetic field. At this time, the area of the laser arrow irradiated on the glass plate 11 is the smallest, the glass plate 11 looks darkest, and the laser arrow is not seen on the glass plate 11, so that the magnitude of the induced electromotive force in the coil 5 can be judged according to the change of the brightness and the irradiated area of the laser arrow, and the beneficial effect that the magnitude of the induced electromotive force in the coil 5 can be indirectly judged according to the area and the brightness of the projection irradiated on the glass plate 11 by the laser pen support 16 is achieved.
In addition, starry sky laser pen 15 is current conventional technology, and this technical field personnel of its and erection joint mode can realize completely, the utility model discloses do not relate to so no longer giving unnecessary details to the transformation of starry sky laser pen 15.
Further, the commutation device comprises a commutator segment 7, an A electric brush 6 and a B electric brush 8, the commutator segment 7 is arranged between the A electric brush 6 and the B electric brush 8, the commutator segment 7 is connected with two output ends of the coil 5, the A electric brush 6 and the B electric brush 8 are both rotationally connected with the commutator segment 7, and the commutator segment 7 is used for enabling the coil 5 to output alternating current or direct current.
Further, a voltmeter is connected in parallel between the a brush 6 and the B brush 8.
Further, still include motor 13 and insulator spindle, motor 13 is fixed to be set up on the support frame 2, 2 middle parts of support frame are provided with the installation cavity, coil skeleton 4 set up in the installation cavity of support frame 2, motor 13 axis of rotation connects one side of coil skeleton 4, the opposite side fixed connection of coil skeleton 4 the insulator spindle, the insulator spindle is rotationally connected support frame 2 just extends support frame 2, the insulator spindle extends the one end fixed connection of support frame 2 commutator segment 7, A brush 6 with B brush 8 all connects support frame 2.
As shown in fig. 1, the shaft of the motor 13 passes through the support frame 2 and then connects the rotating shaft of the coil bobbin 4 with the motor 13 through the coupler 12, so that the motor 13 can drive the coil 5 to rotate around the central shaft, the insulating rod is concentric with the rotating shaft of the motor 13, the insulating rod is an insulator, the bottom of the support frame 2 is fixedly connected with the base 1, the base 1 supports the whole device on the ground, and the motor 13 is connected with the speed regulating device 14 for regulating the rotating speed of the motor 13.
As shown in fig. 1, two brush support rods are arranged on the side surface of the support frame 2, the a brush 6 and the B brush 8 are respectively connected with the two brush support rods in a sliding manner, the a brush 6 and the B brush 8 are respectively provided with through holes matched with the brush support rods, the a brush 6 and the B brush 8 are respectively inserted into the two brush support rods, and the screws are in threaded connection with the two brush support rods, so that the positions of the a brush 6 and the B brush 8 on the brush support rods can be fixed by rotating the screws.
As shown in fig. 3, the commutator segment 7 includes two copper rings, both of the two copper rings are fixedly connected to the insulating rod, each copper ring includes a cylindrical portion and an arc portion, the cylindrical portion is of a cylindrical structure, the cross section of the arc portion is of an arc structure, the arc portions of the two copper rings are oppositely disposed, a gap is formed between end surfaces of the one arc portion and the other copper ring, the end surfaces of the two arc portions are close to each other, and a gap is formed between the two arc portions. The a brush 6 and the B brush 8 are respectively disposed on two sides of the segment 7 and in a plane, and the plane is parallel to the magnetic induction line, as shown in fig. 3, when the a brush 6 and the B brush 8 are respectively disposed on the copper rings on two sides of the segment 7, the a brush 6 and the B brush 8 are equivalently connected to the two copper rings, at this time, alternating current can be output, when the a brush 6 and the B brush 8 are respectively disposed in the gap portion between the segments 7, at this time, the segment 7 is equivalently a commutator in a dc motor, the induced current generated by the coil 5 is output to the a brush 6 and the B brush 8 to form dc, and the function of "the segment 7 is used for enabling the coil 5 to output ac or dc" is realized.
As shown in fig. 1, two terminals 3 are provided on the base 1, and lead wires are led out from the a brush 6 and the B brush 8 to be connected to the terminals 3, and then connected to a voltmeter, so that induced electromotive force generated in the coil 5 can be observed or measured.
Further, magnet group includes magnet 9 that a plurality of set up side by side, two magnet group set up respectively in coil 5's upper and lower both sides and fixed connection support frame 2, a plurality of upper and lower both sides the vertical distribution of line of magnetic induction and the perpendicular to that magnet 9 formed the rotation axle center of coil 5.
As shown in fig. 1, the directions of the magnetic induction lines of the two magnet groups may be, for example, the N pole is on the top, the S pole is on the bottom, and the magnetic induction line direction is from the top to the bottom, or the N pole is on the bottom, the S pole is on the top, and the magnetic induction line direction is from the bottom to the top, which does not affect the implementation of the present technical solution.
In addition, above-mentioned speed adjusting device, motor 13 and voltmeter are current conventional technology, and this technical field personnel of its erection joint mode can realize completely, the utility model discloses do not relate to so no longer give unnecessary details to the transformation of speed adjusting device, motor 13 and voltmeter.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the embodiments in the above description, and the technical concept of the present invention can be within the scope of the present invention, and can be modified to various simple modifications, and these simple modifications all belong to the protection scope of the present invention. It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features. In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.
Claims (7)
1. The demonstration experiment device for the alternating current and direct current power generation principle is characterized by comprising a support frame (2), a coil (5), a coil framework (4), a light-emitting mechanism, an irradiation device, a reversing device and two magnet groups, wherein the coil (5) is sleeved on the coil framework (4), the coil framework (4) is rotatably arranged in the support frame (2), the two magnet groups are arranged in the support frame (2), and the coil (5) is used for rotating to cut a magnetic induction line between the two magnet groups and generate induction current;
the light-emitting mechanism comprises four diode groups, the four diode groups are arranged on two sides of the coil (5) in pairs, each diode group comprises a plurality of light-emitting diodes (10), the light-emitting diodes (10) are connected with the coil (5) to form a loop, the light-emitting diodes (10) in each diode group are connected in series, the directions of the positive and negative electrodes of the light-emitting diodes are the same, the two diode groups on the same side are connected in parallel, and the directions of the positive and negative electrodes of the two diode groups on the same side are opposite and the brightness and the color are different;
the irradiation direction of the irradiation device faces the coil framework (4), the irradiation device is used for irradiating the coil framework (4) to simulate the direction of magnetic induction lines, the reversing device is arranged on one side of the output end of the coil (5), and the reversing device is used for enabling the induced current generated by the coil (5) to be changed from alternating current to direct current.
2. An alternating current and direct current power generation principle demonstration experiment device according to claim 1, characterized by further comprising two glass plates (11), wherein two sides of the coil frame (4) parallel to the coil (5) are respectively and fixedly connected with the two glass plates (11), the glass plates (11) and the diode groups are both parallel to the rotation axis of the coil (5), and one side of the glass plates (11) far away from the coil frame (4) is pasted with frosted glass paper.
3. An experimental apparatus for demonstrating the principles of ac and dc power generation according to claim 2, wherein said irradiation device is a starry laser pointer (15), and the projection of said starry laser pointer (15) on said glass plate (11) is used to display the direction of the magnetic induction lines and to reflect the magnitude of the induced electromotive force.
4. An alternating current and direct current power generation principle demonstration experiment device according to claim 1, wherein the commutation device comprises a commutator segment (7), an A brush (6) and a B brush (8), the commutator segment (7) is arranged between the A brush (6) and the B brush (8), the commutator segment (7) is connected with two output ends of the coil (5), the A brush (6) and the B brush (8) are both rotatably connected with the commutator segment (7), and the commutator segment (7) is used for enabling the coil (5) to output alternating current or direct current.
5. An alternating current and direct current power generation principle demonstration experiment device according to claim 4, wherein a voltmeter is connected in parallel with the A brush (6) and the B brush (8).
6. The demonstration experiment device for the alternating current and direct current power generation principle according to claim 4, it is characterized by also comprising a motor (13) and an insulating rod, wherein the motor (13) is fixedly arranged on the supporting frame (2), the middle part of the support frame (2) is provided with an installation cavity, the coil framework (4) is arranged in the installation cavity of the support frame (2), the rotating shaft of the motor (13) is connected with one side of the coil framework (4), the other side of the coil framework (4) is fixedly connected with the insulating rod, the insulating rod is rotatably connected with the supporting frame (2) and extends out of the supporting frame (2), one end of the insulating rod extending out of the supporting frame (2) is fixedly connected with the commutator bar (7), the A electric brush (6) and the B electric brush (8) are connected with the support frame (2).
7. An alternating current and direct current power generation principle demonstration experiment device according to claim 1, wherein the magnet group comprises a plurality of magnets (9) arranged side by side, two magnet groups are respectively arranged on the upper side and the lower side of the coil (5) and fixedly connected with the support frame (2), and magnetic induction lines formed by the plurality of magnets (9) on the upper side and the lower side are vertically distributed and perpendicular to the rotation axis of the coil (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021826546.XU CN213211446U (en) | 2020-08-27 | 2020-08-27 | Demonstration experiment device for alternating current and direct current power generation principle |
Applications Claiming Priority (1)
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| CN202021826546.XU CN213211446U (en) | 2020-08-27 | 2020-08-27 | Demonstration experiment device for alternating current and direct current power generation principle |
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