CN110619793A - Wireless power transmission experiment system and method - Google Patents
Wireless power transmission experiment system and method Download PDFInfo
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- CN110619793A CN110619793A CN201910946176.9A CN201910946176A CN110619793A CN 110619793 A CN110619793 A CN 110619793A CN 201910946176 A CN201910946176 A CN 201910946176A CN 110619793 A CN110619793 A CN 110619793A
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- G09B23/188—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for motors; for generators; for power supplies; for power distribution
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Abstract
Scientific and technological knowledge becomes the indispensable course of studying of teenagers gradually, and the teaching aid with simple structure, easy preparation is very important in the teaching, can let the student comprehend knowledge more directly perceivedly to through manual preparation, theory combines practice to deepen understanding. The invention aims to overcome the defects in the prior art, provides a wireless power transmission experiment system and a wireless power transmission experiment method, provides an experiment system with stable wireless power transmission effect for students, and is convenient for the students to participate in practice; teaching, and emphasizes on an experimental method for exercising thinking ability and meticulous culture logic of students.
Description
Technical Field
The invention relates to a wireless power transmission experiment system and a wireless power transmission experiment method, in particular to a wireless power transmission experiment system and a wireless power transmission experiment method which are used for training thinking ability of students, cultivating a logic meticulous experiment method, including resistance, capacitance, inductance and triodes, and realizing theoretical connection practice.
Background
With the rapid development of science and technology, people explore the world and innovate and create technology, people are about to step into the wireless power transmission era, namely, electric toothbrushes and mobile phones are charged wirelessly, and high-voltage wireless power transmission is achieved, so that all electric equipment is probably not required to be connected with a power supply lead. If wireless power transmission is achieved, the various electrical devices in the room can receive wireless power. Messy wires and plugboards such as hemp do not exist, and the using amount of the disposable battery is greatly reduced, which is very beneficial to saving resources and protecting the environment. Wireless charging equipment can all be installed in each public place, just like ubiquitous removal signal, wifi signal, the problem of not taking the charger and being in the way can not appear. The electric car does not need to be charged in a charging station, and the running stop caused by the dead battery is reduced.
Scientific and technological knowledge becomes the indispensable course of studying of teenagers gradually, and the teaching aid with simple structure, easy preparation is very important in the teaching, can let the student comprehend knowledge more directly perceivedly to through manual preparation, theory combines practice to deepen understanding. The existing wireless power transmission product has the defects of complex circuit principle, inconvenient teaching demonstration and incapability of manual manufacturing.
The DIY suite and the tutorials on the network on the market are concentrated in the following three ways: firstly, an NPN type triode, a 10k resistor and a winding transmitting coil with a middle tap are adopted, the method is simple in structure and easy to implement, but the transmission power is too small, the operation is unstable, and the experimental phenomenon is not obvious; secondly, an integrated wireless power transmission chip is directly adopted, so that an internal component circuit cannot be seen, various experimental waveforms cannot be tested, and the manual practice of students is not facilitated; thirdly, the wireless power transmission structure made of the digital chip 555 timer is adopted, for a beginner, the concept of the prior analog circuit has a digital circuit, the 555 circuit is directly used for building, the analysis and operation principle of students is too complex, and parameters of a plurality of potentiometers are required to be adjusted.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a wireless power transmission experiment system and a wireless power transmission experiment method, provides an experiment system with stable wireless power transmission effect for students, and is convenient for the students to participate in practice; teaching, and emphasizes on an experimental method for exercising thinking ability and meticulous culture logic of students.
The invention is realized by the following technical scheme, and the wireless power transmission experimental system comprises: the device comprises a transmitting module, a transmitting coil, a receiving coil and a receiving module, and is characterized in that: the transmitting module is connected with the transmitting coil, and alternating voltage is output from two ends of the transmitting coil; the transmit coil has three parameters: the number of turns of the coil, the diameter of the coil and the inductance of the transmitting coil determine the frequency of the alternating voltage output when the transmitting coil is connected with the transmitting module; the receiving coil is connected with the receiving module.
The transmitting module and the transmitting coil form a self-excited oscillation circuit, the forward amplitude and the reverse amplitude of the alternating voltage output by the two ends of the transmitting coil are different, the forward amplitude of the alternating voltage output by the two ends of the transmitting coil is 5V, and the reverse amplitude is 15-40V.
The transmitting module includes: the resistance, the electric capacity, NPN triode, PNP triode, transmitting coil are as the inductance, the electrolytic capacitor who is used for the steady voltage that increases after the access power, then, these basic components and parts of resistance, inductance, two kinds of electric capacity, two kinds of triodes have all included into.
The transmitting module and the transmitting coil form a self-oscillation circuit, and the self-oscillation circuit comprises a non-polar device: the first resistor, the second resistor, the third resistor, the first capacitor and the primary winding coil inductor, and the non-polar device has two ends in common: the PNP triode and the NPN triode are respectively provided with an e end, a b end and a c end; one end of the first resistor, one end of the second resistor and one end of the third resistor are connected, the other end of the first resistor is connected with the end e of the PNP triode and then connected with the positive electrode of the power supply, the other end of the second resistor is connected with one end of the first capacitor and the end b of the NPN triode, the end c of the PNP triode is connected with the other end of the first capacitor and one end of the primary winding coil inductor, and the end e of the NPN triode is connected with the other end of the primary winding coil inductor and the ground.
The transmitting coil has three parameters: the number of turns of the coil, the diameter of the coil and the inductance of the transmitting coil determine the frequency of the alternating voltage output when the transmitting coil is connected with the transmitting module, and the number of turns of the coil, the diameter of the coil and the inductance are all related to the wireless power transmission characteristic; the receiving coil has three parameters: the number of turns of the coil, the diameter of the coil and the inductance of the receiving coil are all related to the wireless power transmission characteristics.
The receiving module indicates the electric energy value transmitted to the receiving coil by the transmitting coil, the receiving module can adopt a light-emitting diode and/or rectify the electric energy value into a direct current module, the light-emitting diode represents the electric energy value obtained by the receiving coil by brightness, and the electric energy value obtained by the receiving coil represents the electric energy value obtained by the receiving coil by a voltage value and/or a current value after rectification into a direct current module.
The receiving module can adopt the following modes: the current measuring resistor is connected with two anti-parallel light emitting diodes, the differential voltage at two ends of the current measuring resistor can represent the current value, and the voltage value at two ends of the receiving module is also detected; the receiving module can adopt the following modes: the rectifier is a direct current module, the test resistor is connected after the rectifier module is connected, and the voltage values at the two ends of the test resistor represent the received electric energy value; the receiving module can be simplified to be just one light-emitting diode, and the brightness of the light-emitting diode is used for representing the received electric energy value.
The transmitting coil is provided with a steering engine for adjusting the angle; the receiving coil is provided with an electric linear potentiometer to adjust the position, the middle terminal of the electric linear potentiometer adjusts the output resistance value in a linear stroke mode, the middle terminal can be driven by a motor, the resistance distribution can indicate the position of the middle terminal, and the resistance distribution can be represented by a voltage value.
The electric linear potentiometer has three output terminals: two both ends terminals (terminal 1, terminal 2), intermediate terminal, the resistance value between two both ends terminals is unchangeable, and the access mode is: two-terminal output and three-terminal output, two-terminal output is: one of the terminals at both ends (terminal 1 or terminal 2), an intermediate terminal; when the three terminals output, the resistance ratio between the middle terminal and the two terminals (terminal 1 and terminal 2) changes; the resistance distribution can also be characterized by a voltage value by adding a voltage U1 between two terminals (terminal 1, terminal 2) at two ends of the electric linear potentiometer and measuring a voltage U2 between the middle terminal and any one of the two terminals.
A training method for the wireless power transmission experimental system according to any one of claims 1 to 6, characterized by studying five factors that affect the wireless power transmission characteristics: voltage, frequency, coil diameter, number of coil turns, angle between the transmitting coil and the receiving coil.
The influence factor experiment of voltage, the self-excited oscillation circuit that emission module and transmitting coil constitute for the alternating voltage positive, negative-going amplitude is different at transmitting coil both ends, and transmitting coil is 0 degree parallel with receiving coil, then transmitting coil is 180 degrees upsets with receiving coil again, just can study the influence of voltage to wireless transmission characteristics.
The angle experiment between the transmitting coil and the receiving coil is divided into two types: face angle and line angle; the angle of a plane of the transmitting coil is not changed, the angle of a plane where the receiving coil is located is not changed, the center points of the transmitting coil and the receiving coil are on a straight line perpendicular to the plane of the receiving coil, the center point of the transmitting coil is not changed, the included angle between the plane where the transmitting coil is located and the plane where the receiving coil is located is changed, the included angle is 0 degree in parallel and 90 degrees in perpendicular, wireless transmission change of the included angle 0-90 degrees is researched, and the conclusion is drawn that when the transmitting coil and the receiving coil are parallel, the wireless transmission efficiency is highest, and the wireless transmission distance is the; the two lines form an angle, the transmitting coil and the receiving coil are parallel, but the central point straight line of the two coils forms an included angle with the plane where the receiving coil is located, and when the included angle is 90 degrees, the two coils are in the same plane.
The frequency influence experiment shows that under the condition that the receiving coil is not changed, the angle between the transmitting coil and the receiving coil is kept unchanged, the two compared transmitting coils have the advantages that the coil diameters are the same, the coil turns are the same, but the inductance is different, and the method which can be adopted is to wind the transmitting coil by using enameled wires with different wire diameters. For example, the influence of the frequency on the wireless transmission can be studied with a receiving coil having a diameter of 5cm, a number of turns of coil of 20, and an inductance of 30uH, a transmitting coil 1 having a diameter of 5cm, a number of turns of coil of 15, a wire diameter of 0.3mm, and an inductance of 32uH, and a transmitting coil 2 having a diameter of 5cm, a number of turns of coil of 15, a wire diameter of 0.49mm, and an inductance of 20 uH.
The number of turns of the coil affects the experiment, under the condition that the transmitting coil is not changed, the angle between the transmitting coil and the receiving coil is kept unchanged, and the two compared receiving coils have the same coil diameter and different number of turns of the coil; the coil diameter influences the experiment, and under the unchangeable condition of transmitting coil, the angle of transmitting coil and receiving coil remains unchanged, and two receiving coils of comparing must be that the coil number of turns is the same, the coil diameter is different.
The student can also be given a training question, and when the receiving module adopts a light-emitting diode, how to design the transmitting coil and the receiving coil is to make the distance of wireless power transmission farthest; the students can also be given a thought expansion problem, and the influence on the receiving coil when the number of the transmitting coils is more than 1 is provided, for example, two transmitting coils are adopted, and the receiving coil is positioned between the two transmitting coils.
Compared with the prior art, the invention has the following beneficial effects: firstly, providing a wireless power transmission effect stable experiment system for students; secondly, students can participate in practice conveniently; thirdly, the experimental method aims at exercising the thinking ability and meticulous culture logic of the students.
Drawings
FIG. 1 is a wireless power transmission experimental system;
FIG. 2 is a self-oscillating circuit;
FIG. 3 is a voltage waveform of the transmitter coil output;
FIG. 4 is a first mode of an angle experiment of a transmitting coil and a receiving coil, a face angle;
FIG. 5 is a second way of testing the angle of the transmitter coil and receiver coil, the line angle;
fig. 6 is a diagram of an automated and remote experimental system for wireless power transmission.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1, the wireless power transmission experimental system includes: the device comprises a transmitting module, a transmitting coil, a receiving coil and a receiving module; the transmitting module adopts a self-excited oscillation module and forms a self-excited oscillation circuit with the transmitting coil; the receiving module adopts a light emitting diode.
As shown in fig. 2, the self-oscillation circuit includes, as nonpolar devices: the first resistor R1, the second resistor R2, the third resistor R3, the first capacitor C1 and the primary coil inductor L1 share two ends: one end and the other end, the PNP triode VT1 and the NPN triode VT2 are respectively provided with an e end, a b end and a c end; one end of a first resistor R1, one end of a second resistor R2 and one end of a third resistor R3 are connected, the other end of the first resistor R1 is connected with the e end of a PNP triode VT1 and then is connected with a power supply positive electrode Vcc, the other end of the second resistor R2 is connected with one end of a first capacitor C1 and the b end of an NPN triode VT2, the C end of the PNP triode VT1 is connected with the other end of the first capacitor C1 and one end of a transmitting coil primary coil inductor L1, and the e end of the NPN triode VT2 is connected with the other end of the primary coil inductor L1 and the ground; the power supply Vcc is 5V, R1 is 470 omega, R2 is 10k omega, R3 is 470 omega, the model number of C1 is 222, the value is 2.2nF, the PNP triode VT1 is selected as B772, and the NPN triode VT2 is selected as 8050.
As shown in fig. 3, the voltage waveform output by the transmitting coil, the forward direction 5V and the reverse direction 25V are ac waveforms, the receiving coil has directivity due to the unidirectional conductivity of the light emitting diode, the luminance of the light emitting diode is different between the forward direction and the reverse direction, and the influence of the voltage on the wireless transmission characteristics can be verified.
The angle experiment between the transmitting coil and the receiving coil is divided into two types: face angle and line angle; as shown in fig. 4, the angle of the plane where the receiving coil is located is unchanged, the center points of the transmitting coil and the receiving coil are on a straight line perpendicular to the plane of the receiving coil, the center point of the transmitting coil is kept unchanged, the included angle P between the plane where the transmitting coil is located and the plane where the receiving coil is located is changed, the included angle P is horizontal to 0 degree and perpendicular to 90 degrees, the wireless transmission characteristic of the included angle 0-90 degrees is studied, and when the transmitting coil and the receiving coil are parallel, the wireless transmission efficiency is highest, and the wireless transmission distance is largest; as shown in fig. 5, the transmitting coil and the receiving coil are parallel, and the included angle Q between the straight line of the central point of the two coils and the normal of the receiving coil is 90 degrees, and the two coils are in the same plane.
As shown in fig. 6, the wireless power transmission automation and remote experiment system is characterized in that a transmitting coil is provided with a steering engine for adjusting an angle, the rotation range of the steering engine is 180 degrees, the working torque is 1.6kg/cm, the reaction rotation speed is 0.12-0.13 second/60 degrees, a dead zone is set to be 5us, a steering engine control time base pulse is 20ms, 0.5ms corresponds to 0 degree, 1ms corresponds to 45 degrees, 1.5ms corresponds to 90 degrees, 2ms corresponds to 135 degrees, and 2.5ms corresponds to 180 degrees; the receiving coil is provided with an electric linear potentiometer for adjusting the position, the middle terminal of the electric linear potentiometer adjusts the output resistance value in a linear stroke mode, the middle terminal can be driven by a motor, the resistance value distribution can indicate the position of the middle terminal, the total resistance value is 10k omega, and the linear stroke is 10 cm.
Claims (10)
1. A wireless power transmission experiment system includes: the device comprises a transmitting module, a transmitting coil, a receiving coil and a receiving module, and is characterized in that: the transmitting module is connected with the transmitting coil, and alternating voltage is output from two ends of the transmitting coil; the transmit coil has three parameters: the number of turns of the coil, the diameter of the coil and the inductance of the transmitting coil determine the frequency of the alternating voltage output when the transmitting coil is connected with the transmitting module; the receiving coil is connected with the receiving module.
2. The wireless power transmission experimental system as claimed in claim 1, wherein the transmitter module and the transmitter coil form a self-excited oscillation circuit, the forward amplitude and the reverse amplitude of the ac voltage output from both ends of the transmitter coil are different, the forward amplitude of the ac voltage output from both ends of the transmitter coil is 5V, and the reverse amplitude is 15-40V.
3. The wireless power transmission experimental system as claimed in claim 1, wherein the transmitting module and the transmitting coil form a self-excited oscillation circuit, and the self-excited oscillation circuit comprises a non-polar device: the first resistor, the second resistor, the third resistor, the first capacitor and the primary winding coil inductor, and the non-polar device has two ends in common: the PNP triode and the NPN triode are respectively provided with an e end, a b end and a c end; one end of the first resistor, one end of the second resistor and one end of the third resistor are connected, the other end of the first resistor is connected with the end e of the PNP triode and then connected with the positive electrode of the power supply, the other end of the second resistor is connected with one end of the first capacitor and the end b of the NPN triode, the end c of the PNP triode is connected with the other end of the first capacitor and one end of the primary winding coil inductor, and the end e of the NPN triode is connected with the other end of the primary winding coil inductor and the ground.
4. The wireless power transmission experimental system of claim 1, wherein the transmitting coil has three parameters: the number of turns of the coil, the diameter of the coil and the inductance of the transmitting coil determine the frequency of the alternating voltage output when the transmitting coil is connected with the transmitting module, and the number of turns of the coil, the diameter of the coil and the inductance are all related to the wireless power transmission characteristic; the receiving coil has three parameters: the number of turns of the coil, the diameter of the coil and the inductance of the receiving coil are all related to the wireless power transmission characteristics.
5. The wireless power transmission experimental system as claimed in claim 1, wherein the receiving module indicates the amount of power transmitted from the transmitting coil to the receiving coil, the receiving module can use a light emitting diode and/or a rectifier to be a dc module, the light emitting diode represents the amount of power obtained by the receiving coil with brightness, and the rectifier to be a dc module represents the amount of power obtained by the receiving coil with a voltage value and/or a current value.
6. The wireless power transmission experimental system as claimed in claim 1, wherein the transmitting coil is provided with a steering engine for adjusting an angle; the receiving coil is provided with an electric linear potentiometer to adjust the position, the middle terminal of the electric linear potentiometer adjusts the output resistance value in a linear stroke mode, the middle terminal can be driven by a motor, the resistance distribution can indicate the position of the middle terminal, and the resistance distribution can be represented by a voltage value.
7. A training method for the wireless power transmission experimental system according to any one of claims 1 to 6, characterized by studying five factors that affect the wireless power transmission characteristics: voltage, frequency, coil diameter, number of coil turns, angle between the transmitting coil and the receiving coil.
8. The training method of the wireless power transmission experimental system as claimed in claim 7, wherein in the experiment of the influence factors of the voltage, the self-excited oscillation circuit consisting of the transmitting module and the transmitting coil makes the positive and negative amplitudes of the alternating voltages at two ends of the transmitting coil different, the transmitting coil and the receiving coil are parallel at 0 degree, and then the transmitting coil and the receiving coil are turned over at 180 degrees, so that the influence of the voltage on the transmission characteristics of the wireless power transmission can be studied.
9. The training method of the wireless power transmission experimental system as claimed in claim 7, wherein the angle experiment between the transmitting coil and the receiving coil is divided into two types: face angle and line angle; the angle of a plane of the transmitting coil is not changed, the angle of a plane where the receiving coil is located is not changed, the center points of the transmitting coil and the receiving coil are on a straight line perpendicular to the plane of the receiving coil, the center point of the transmitting coil is not changed, the included angle between the plane where the transmitting coil is located and the plane where the receiving coil is located is changed, the included angle is 0 degree in parallel and 90 degrees in perpendicular, wireless transmission change of the included angle 0-90 degrees is researched, and the conclusion is drawn that when the transmitting coil and the receiving coil are parallel, the wireless transmission efficiency is highest, and the wireless transmission distance is the; the two lines form an angle, the transmitting coil and the receiving coil are parallel, but the central point straight line of the two coils forms an included angle with the plane where the receiving coil is located, and when the included angle is 90 degrees, the two coils are in the same plane.
10. The training method of the wireless power transmission experiment system according to claim 7, wherein in the frequency influence experiment, under the condition that the receiving coil is not changed, the angle between the transmitting coil and the receiving coil is kept unchanged, the two compared transmitting coils have the same coil diameter and the same coil turns but different inductance, and the method adopted is to wind the transmitting coil by using enameled wires with different wire diameters;
the number of turns of the coil affects the experiment, under the condition that the transmitting coil is not changed, the angle between the transmitting coil and the receiving coil is kept unchanged, and the two compared receiving coils have the same coil diameter and different number of turns of the coil;
the coil diameter influences the experiment, under the condition that the transmitting coil is not changed, the angle between the transmitting coil and the receiving coil is kept unchanged, and the two compared receiving coils have the same coil turns and different coil diameters;
the student can also be given a training question, and when the receiving module adopts a light-emitting diode, how to design the transmitting coil and the receiving coil is to make the distance of wireless power transmission farthest; the students can also be given a thought expansion problem, and the influence on the receiving coil when the number of the transmitting coils is more than 1 is provided.
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| CN201910946176.9A CN110619793A (en) | 2019-10-03 | 2019-10-03 | Wireless power transmission experiment system and method |
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| CN201910946176.9A CN110619793A (en) | 2019-10-03 | 2019-10-03 | Wireless power transmission experiment system and method |
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Application publication date: 20191227 |