CN101340113A - Magnet coupled resonant type wireless energy transmission equipment having intensifier - Google Patents
Magnet coupled resonant type wireless energy transmission equipment having intensifier Download PDFInfo
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- CN101340113A CN101340113A CNA2008101368922A CN200810136892A CN101340113A CN 101340113 A CN101340113 A CN 101340113A CN A2008101368922 A CNA2008101368922 A CN A2008101368922A CN 200810136892 A CN200810136892 A CN 200810136892A CN 101340113 A CN101340113 A CN 101340113A
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Abstract
A magnetic coupling resonant wireless energy transmission device provided with an intensifier relates to the field of wireless energy transmission, and aims at intensifying the transmission distance of existing magnetic coupling resonant wireless energy transmission technology. The invented transmission device consists of an intensified emission source and an energy receiver; the two electromagnetic systems with the same specific resonant frequency are used for energy transmission owing to the resonance caused by the same vibration frequency, when the two systems are separated from a certain distance. An intensifier is added in the intensified emission source, strong magnetic coupling is produced between the intensifier and a resonant emission circuit, the intensifier has the functions of reducing impedance, modifying transmitted waveforms, intensifying resonant current, emitting modified alternating magnetic fields outwards, resonance ia produced between the intensifier and the energy receiver. Owing to the adding of the intensifier, the energy transmission distance of the technology is intensified greatly, is about five times longer than the former and is probably even longer.
Description
Technical field
The present invention relates to the wireless energy transfer field.
Background technology
Current nearly all power consumption equipment all must use tangible medium (as: using plain conductor, electric wire) just can carry out the transmission of electric power transfer or energy as main connection, even short distance electric power transfer (such as computer, TV, desk lamp etc.), also must be through the loaded down with trivial details process of power line connection and shop line or backguy, making need be with electronics, the electric equipment of electric power as power, and its ornaments position is affected.If can develop more good wireless energy transmission technology and device, realize not transmitted by the active power of foreign object or surrounding environment influence, just can reach the transmission of electric power by wireless transmission means, so when using these electric equipments, must be more handy.In addition, in some special application places, maybe can not use the occasion of lead power supply all to have very actual using value as inconveniences such as underwater operation, medical embedded equipment, wireless networks.
According to the power transfer principle, at present, at home and abroad Yan Jiu wireless energy transmission technology develops towards the direction of magnetic coupling resonance, the magnet coupled resonant type energy transmission technology, be to utilize two electromagnetic systems with identical particular resonant frequency, at a distance of certain apart from the time, produce resonance owing to vibration frequency is identical, carry out energy delivery.Produce non-radiative magnetic field by the resonance transmitting coil, when the resonance receiving coil enters this action of a magnetic field zone, owing to having identical frequency of oscillation, resonance receiving coil and this magnetic field produces magnetic resonance, energy in the resonance receiving coil is constantly assembled, voltage constantly raises, after follow-up energy reception and change-over circuit, energy can be offered load and use.In general, electromagnetic system at a distance of certain distance, be weak coupling each other, but, then can produce the forceful electric power magnetic resonance if the natural resonance frequency of two systems is identical, constitute an electromagentic resonance system, if a plurality of resonant bodies are arranged in effective range, then can add this resonator system equally, if connecting power supply, a certain end constantly provides energy for this resonator system, and the opposing party's consumed energy has then been realized the transmission of energy.Why being called " magnet coupled resonant type ", be because it is alternating magnetic field that the media of energy exchange is carried out in the space, and the object in our surroundings comprises that organism is subjected to the influence in magnetic field very little (electric field then can be caused danger).Though the device of existing magnet coupled resonant type wireless power transfer can have been finished the wireless transmission function of big distance, in some special environment, as needing to strengthen its transmission range under the situation special under water or between two steep cliffs etc.
Summary of the invention
The present invention is the transmission range that has magnetic coupling resonance type wireless energy transmission technology now in order to increase, and a kind of magnet coupled resonant type wireless energy transmission equipment that has booster is provided.
The magnet coupled resonant type wireless energy transmission equipment that has booster of the present invention comprises enhanced emission source and energy receiver;
Described enhanced emission source is made up of magnetic field resonant excitation and drive circuit, resonance radiating circuit and booster;
Magnetic field resonant excitation and drive circuit are made up of drive circuit and driving switch pipe, and drive circuit produces identical with the resonance tranmitting frequency of setting or is the drive signal of the 1/n of resonance tranmitting frequency, and the driving switch pipe receives drive signal; The switching frequency of driving switch pipe is identical with the resonance tranmitting frequency or be the 1/n of resonance tranmitting frequency, is used for giving the resonance radiating circuit with the energy supplement of DC power supply, and n wherein is a positive integer;
The resonance radiating circuit is made up of resonance transmitting coil and resonance emission electric capacity, and resonance transmitting coil and resonance emission electric capacity constitute resonator system, and energy exchanges with magnetic field and electric field form at resonance transmitting coil and resonance emission electric capacity respectively; In the resonance transmitting coil, produce and the identical resonance current of setting of resonance tranmitting frequency; Resonance current in the resonance transmitting coil forms alternating magnetic field;
Booster strengthens electric capacity by resonance intensifier coil and resonance and forms, the resonance intensifier coil of booster receives the alternating magnetic field of being launched in the resonance transmitting coil and forms resonance current, the resonance intensifier coil strengthens capacitances in series with resonance and becomes the closed-loop path, be used to adjust the waveform of emission source and increase the resonance current that receives, adjusted resonance current is launched adjusted alternating magnetic field by the resonance intensifier coil to receiver again, and produces resonance with energy receiver;
Described energy receiver is made up of resonance receiving circuit and high-frequency rectification circuit;
The resonance receiving circuit is used to receive the magnetic field energy that booster transmits; The resonance receiving circuit receives electric capacity by resonance receiving coil and resonance to be formed, and resonance receiving coil and resonance receive electric capacity and is used to set the resonance receive frequency, and the resonance receive frequency of setting is identical with the resonance tranmitting frequency of setting;
High-frequency rectification circuit, the electric energy that the resonance receiving circuit is received carries out rectification output.
Booster of the present invention can be adjusted the voltage waveform of emission source.As shown in Figure 2, the voltage waveform at emission source two ends is not the sine wave of standard, and this is that because this waveform is not the sine wave of standard, it is far that this has just determined that energy can not transmit because the structure and the coupling inductance of emission source determine.After adding booster, because the frequency of itself and emission source is identical, produce resonance with emission source, formed sinusoidal wave as shown in Figure 4, because booster and emission source are very near from getting, what we were indirect can be booster as new emission source, and we have just obtained our desired sinusoidal wave emission source like this.This booster can also strengthen resonance current, to strengthen the emission magnetic field intensity, has enlarged the action of a magnetic field scope, thereby the energy transmission range is improved.Because the adding of booster, the distance of this magnetic coupling resonant energy transmission has had very large raising, is about original 5 times, also might be farther.
Description of drawings
Fig. 1 is the structural representation that has the magnet coupled resonant type wireless energy transmission equipment of booster of the present invention; Fig. 2 is the voltage waveform at the coil two ends of reflector when not adding booster; Fig. 3 is the voltage waveform at the coil two ends of receiver when not adding booster; Fig. 4 is the voltage waveform at resonance intensifier coil two ends that has the enhanced emission source of booster; Fig. 5 is the voltage waveform at the coil two ends of receiver when receiving the enhanced emission source that has booster.
Embodiment
Embodiment one: in conjunction with Fig. 1 present embodiment is described, the magnet coupled resonant type wireless energy transmission equipment that has booster of present embodiment is made up of enhanced emission source 1 and energy receiver 2;
Described enhanced emission source 1 is made up of magnetic field resonant excitation and drive circuit 1-1, resonance radiating circuit 1-2 and booster 1-3;
Magnetic field resonant excitation and drive circuit 1-1 are made up of drive circuit 1-1-1 and driving switch pipe 1-1-2, drive circuit 1-1-1 produces identical with the resonance tranmitting frequency of setting or is the drive signal of the 1/n of resonance tranmitting frequency, and driving switch pipe 1-1-2 receives drive signal; The switching frequency of driving switch pipe 1-1-2 is identical with the resonance tranmitting frequency or be the 1/n of resonance tranmitting frequency, is used for giving resonance radiating circuit 1-2 with the energy supplement of DC power supply, and n wherein is a positive integer;
Resonance radiating circuit 1-2 is made up of resonance transmitting coil 1-2-1 and resonance emission electric capacity 1-2-2, resonance transmitting coil 1-2-1 and resonance emission electric capacity 1-2-2 constitute resonator system, and energy exchanges with magnetic field and electric field form at resonance transmitting coil 1-2-1 and resonance emission electric capacity 1-2-2 respectively; In resonance transmitting coil 1-2-1, produce and the identical resonance current of setting of resonance tranmitting frequency; Resonance current among the resonance transmitting coil 1-2-1 forms alternating magnetic field;
Booster 1-3 strengthens electric capacity 1-3-2 by resonance intensifier coil 1-3-1 and resonance and forms, the resonance intensifier coil 1-3-1 of booster 1-3 receives the alternating magnetic field of being launched among the resonance transmitting coil 1-2-1 and forms resonance current, resonance intensifier coil 1-3-1 and resonance strengthen electric capacity 1-3-2 and are connected into the closed-loop path, be used to adjust the waveform of emission source and increase the resonance current that receives, booster 1-3 and resonance radiating circuit 1-2 produce strong magnetic coupling, resonate, reduce the impedance among the booster 1-3, adjust the transmitted waveform of resonance radiating circuit 1-2, increase the resonance current that receives, and then increased the intensity of alternating magnetic field, enlarged the sphere of action in magnetic field, adjusted resonance current is launched adjusted alternating magnetic field by resonance intensifier coil 1-3-1 to receiver again, and produces resonance with energy receiver 2; And then increase power transfer distance; The resonance intensifier coil 1-3-1 of booster 1-3 is consistent with coil and capacitance parameter in emission source and the receiver with the parameter that resonance strengthens electric capacity 1-3-2, has so just guaranteed that they have a common resonance frequency.
Described energy receiver 2 is made up of resonance receiving circuit 2-1 and high-frequency rectification circuit 2-2;
Resonance receiving circuit 2-1 is used to receive the magnetic field energy that booster 1-3 transmits; Resonance receiving circuit 2-1 receives electric capacity 2-1-2 by resonance receiving coil 2-1-1 and resonance and forms, and resonance receiving coil 2-1-1 and resonance receive electric capacity 2-1-2 and is used to set the resonance receive frequency, and the resonance receive frequency of setting is identical with the resonance tranmitting frequency of setting;
High-frequency rectification circuit 2-2, the electric energy that resonance receiving circuit 2-1 is received carries out rectification output.
Embodiment two: present embodiment is described in conjunction with Fig. 1, present embodiment is that with embodiment one difference an end of DC power supply is connected the input of magnetic field resonant excitation and drive circuit 1-1, the output of magnetic field resonant excitation and drive circuit 1-1 connects the input of resonance radiating circuit 1-2, and the other end that the output of resonance radiating circuit 1-2 connects DC power supply constitutes the loop; The signal output part of drive circuit 1-1-1 among magnetic field resonant excitation and the drive circuit 1-1 connects the grid of driving switch pipe 1-1-2, the drain electrode of driving switch pipe 1-1-2 is the input of magnetic field resonant excitation and drive circuit 1-1, and the source electrode of driving switch pipe 1-1-2 is the output of magnetic field resonant excitation and drive circuit 1-1.Other composition is identical with embodiment one with connected mode.
Embodiment three: in conjunction with Fig. 1 present embodiment is described, present embodiment is that with embodiment two differences the resonance transmitting coil 1-2-1 among the resonance radiating circuit 1-2 adopts serial or parallel connection to be connected with resonance emission electric capacity 1-2-2; Other composition is identical with embodiment two with connected mode.
The resonance frequency of resonance radiating circuit 1-2 is determined by following formula:
C wherein
1There are a plurality of electric capacity simultaneously in electric capacity for resonance emission electric capacity 1-2-2 in the ifs circuit, then need according to physical circuit, calculates equivalent capacity according to the series and parallel relation of electric capacity; L
1It is the inductance of resonance transmitting coil 1-2-1.According to the power transfer needs of reality, determine the inductance L of the resonance transmitting coil 1-2-1 of resonance radiating circuit 1-2
1Capacitor C with resonance emission electric capacity 1-2-2
1Then the resonance tranmitting frequency of circuit can be determined by formula (4), can determine the frequency of the drive signal of driving switch pipe 1-1-2 thus, by the control that driving switch pipe 1-1-2 is turned on and off, in resonance transmitting coil 1-2-1, produce and have the electric current that needs frequency, this electric current generation magnetic field.
Embodiment four: in conjunction with Fig. 1 present embodiment is described, present embodiment and embodiment three differences are that booster 1-3 is that resonance radiating circuit 1-2 is apart from 1/5th of resonance receiving circuit 2-1 apart from resonance radiating circuit 1-2.Other composition is identical with embodiment three with connected mode.
Embodiment five: in conjunction with Fig. 1 present embodiment is described, present embodiment and embodiment three differences are that the distance between booster 1-3 and the resonance radiating circuit 1-2 is 1～20cm.Other composition is identical with embodiment three with connected mode.
Embodiment six: in conjunction with Fig. 1 present embodiment is described, present embodiment and embodiment three differences are that the distance between booster 1-3 and the resonance radiating circuit 1-2 is 10cm.Other composition is identical with embodiment three with connected mode.
Embodiment seven: present embodiment is described in conjunction with Fig. 1, present embodiment and embodiment one to six difference are that enhanced emission source 1 has increased power converting circuit 1-4, and power converting circuit 1-4 is used for alternating current being converted to direct current and being transferred to the magnetic field resonant excitation and drive circuit 1-1 and resonance radiating circuit 1-2; Other composition is identical with embodiment one to six with connected mode.
Embodiment eight: in conjunction with Fig. 1 present embodiment is described, present embodiment is that with embodiment seven differences the resonance receiving coil 2-1-1 among the resonance receiving circuit 2-1 adopts serial or parallel connection to be connected with resonance reception electric capacity 2-1-2; Other composition is identical with embodiment seven with connected mode.
Embodiment nine: in conjunction with Fig. 1 present embodiment is described, present embodiment and embodiment one, two or eight differences are that the resonance receive frequency set and the resonance tranmitting frequency of setting are 0.05MHz～50MHz.Other composition is identical with embodiment one, two or eight with connected mode.Resonance frequency used in the present invention can be selected different Frequency point or frequency band according to the needs of aspects such as transmission range and through-put power.
Embodiment ten: in conjunction with Fig. 1 present embodiment is described, present embodiment and embodiment nine differences are to have in the magnet coupled resonant type wireless energy transmission equipment a plurality of energy receiver 2.Other composition is identical with embodiment nine with connected mode.
Claims (10)
1, the magnet coupled resonant type wireless energy transmission equipment that has booster is characterized in that it comprises enhanced emission source (1) and energy receiver (2);
Described enhanced emission source (1) is made up of magnetic field resonant excitation and drive circuit (1-1), resonance radiating circuit (1-2) and booster (1-3);
Magnetic field resonant excitation and drive circuit (1-1) are made up of drive circuit (1-1-1) and driving switch pipe (1-1-2), drive circuit (1-1-1) produces identical with the resonance tranmitting frequency of setting or is the drive signal of the 1/n of resonance tranmitting frequency, and driving switch pipe (1-1-2) receives drive signal; The switching frequency of driving switch pipe (1-1-2) is identical with the resonance tranmitting frequency or be the 1/n of resonance tranmitting frequency, is used for giving resonance radiating circuit (1-2) with the energy supplement of DC power supply, and n wherein is a positive integer;
Resonance radiating circuit (1-2) is made up of resonance transmitting coil (1-2-1) and resonance emission electric capacity (1-2-2), resonance transmitting coil (1-2-1) constitutes resonator system with resonance emission electric capacity (1-2-2), and energy is launched electric capacity (1-2-2) with magnetic field and the exchange of electric field form at resonance transmitting coil (1-2-1) and resonance respectively; In resonance transmitting coil (1-2-1), produce and the identical resonance current of setting of resonance tranmitting frequency; Resonance current in the resonance transmitting coil (1-2-1) forms alternating magnetic field;
Booster (1-3) strengthens electric capacity (1-3-2) by resonance intensifier coil (1-3-1) and resonance and forms, the resonance intensifier coil (1-3-1) of booster (1-3) receives the alternating magnetic field of being launched in the resonance transmitting coil (1-2-1) and forms resonance current, resonance intensifier coil (1-3-1) and resonance strengthen electric capacity (1-3-2) and are connected into the closed-loop path, be used to adjust the waveform of emission source and increase the resonance current that receives, adjusted resonance current is launched adjusted alternating magnetic field by resonance intensifier coil (1-3-1) to receiver again, and produces resonance with energy receiver (2);
Described energy receiver (2) is made up of resonance receiving circuit (2-1) and high-frequency rectification circuit (2-2);
Resonance receiving circuit (2-1) is used to receive the magnetic field energy that booster (1-3) transmits; Resonance receiving circuit (2-1) receives electric capacity (2-1-2) by resonance receiving coil (2-1-1) and resonance and forms, resonance receiving coil (2-1-1) and resonance receive electric capacity (2-1-2) and are used to set the resonance receive frequency, and the resonance receive frequency of setting is identical with the resonance tranmitting frequency of setting;
High-frequency rectification circuit (2-2), the electric energy that resonance receiving circuit (2-1) is received carries out rectification output.
2, the magnet coupled resonant type wireless energy transmission equipment that has booster according to claim 1, it is characterized in that an end of DC power supply connects the input of magnetic field resonant excitation and drive circuit (1-1), the output of magnetic field resonant excitation and drive circuit (1-1) connects the input of resonance radiating circuit (1-2), and the other end that the output of resonance radiating circuit (1-2) connects DC power supply constitutes the loop; The signal output part of the drive circuit (1-1-1) in magnetic field resonant excitation and the drive circuit (1-1) connects the grid of driving switch pipe (1-1-2), the drain electrode of driving switch pipe (1-1-2) is the input of magnetic field resonant excitation and drive circuit (1-1), and the source electrode of driving switch pipe (1-1-2) is the output of magnetic field resonant excitation and drive circuit (1-1).
3, the magnet coupled resonant type wireless energy transmission equipment that has booster according to claim 2 is characterized in that the resonance transmitting coil (1-2-1) in the resonance radiating circuit (1-2) adopts serial or parallel connection to be connected with resonance emission electric capacity (1-2-2).
4, the magnet coupled resonant type wireless energy transmission equipment that has booster according to claim 3 is characterized in that booster (1-3) is that resonance radiating circuit (1-2) is apart from 1/5th of resonance receiving circuit (2-1) apart from resonance radiating circuit (1-2).
5, the magnet coupled resonant type wireless energy transmission equipment that has booster according to claim 3 is characterized in that the distance between booster (1-3) and the resonance radiating circuit (1-2) is 1～20cm.
6, the magnet coupled resonant type wireless energy transmission equipment that has booster according to claim 3 is characterized in that the distance between booster (1-3) and the resonance radiating circuit (1-2) is 10cm.
7, according to claim 1,2,3,4, the 5 or 6 described magnet coupled resonant type wireless energy transmission equipments that have booster, it is characterized in that enhanced emission source (1) also comprises power converting circuit (1-4), power converting circuit (1-4) is used for alternating current being converted to direct current and being transferred to the magnetic field resonant excitation and drive circuit (1-1) and resonance radiating circuit (1-2).
8, the magnet coupled resonant type wireless energy transmission equipment that has booster according to claim 7 is characterized in that the resonance receiving coil (2-1-1) in the resonance receiving circuit (2-1) adopts serial or parallel connection to be connected with resonance reception electric capacity (2-1-2).
9, according to claim 1, the 2 or 8 described magnet coupled resonant type wireless energy transmission equipments that have booster, the resonance transmit frequency range that it is characterized in that the resonance receive frequency set and setting is between 0.05MHz～50MHz.
10, the magnet coupled resonant type wireless energy transmission equipment that has booster according to claim 9 is characterized in that having in the magnet coupled resonant type wireless energy transmission equipment a plurality of energy receiver (2).
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| CNA2008101368922A CN101340113A (en) | 2008-08-08 | 2008-08-08 | Magnet coupled resonant type wireless energy transmission equipment having intensifier |
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| CN104578345B (en) * | 2015-01-23 | 2017-02-22 | 山东大学 | Electromagnetic resonance type wireless charging device and control method based on CLL resonant transformation |
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