CN202565039U - Multi-transmitting single-receiving type wireless energy transmission device - Google Patents

Multi-transmitting single-receiving type wireless energy transmission device Download PDF

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CN202565039U
CN202565039U CN2012201939386U CN201220193938U CN202565039U CN 202565039 U CN202565039 U CN 202565039U CN 2012201939386 U CN2012201939386 U CN 2012201939386U CN 201220193938 U CN201220193938 U CN 201220193938U CN 202565039 U CN202565039 U CN 202565039U
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transmitting coil
receiving
coil
transmitting
emitter
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崔铁军
刘硕
陈林辉
凌昕彤
陈维舟
谭杭波
周永春
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Southeast University
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Southeast University
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Abstract

The utility model provides a multi-transmitting single-receiving type wireless energy transmission device. The wireless energy transmission device comprises at least two transmitting device and one receiving device; each transmitting device comprises a high-frequency power source and a transmitting coil Lt, and further comprises a transmitting impedance network, wherein one side of the transmitting impedance matching network is connected with two ends of the high-frequency power source while the other side thereof is connected with two ends of the transmitting coil Lt; the transmitting coil Lt comprises a high-frequency parasitic resistor Rpt; the receiving device comprises a receiving coil Lr and a load RL, and further comprises a receiving impedance matching network, wherein one side of the receiving impedance matching network is connected with two ends of the receiving coil Lr while the other side thereof is connected with the load RL; and the receiving coil Lr comprises a high-frequency parasitic resistor Rpr. The wireless energy transmission device can remarkably prolong the wireless energy transmission distance, which makes long-distance wireless energy transmission possible.

Description

The wireless energy transform device of multiple single receipts formula
Technical field
The utility model relates to the wireless energy transform device of the single receipts formula of a kind of pilosity; Relate in particular to a kind of a plurality of transmitter and single receiver is carried out the device of high efficiency wireless energy transfer; Can be applicable in small-power, middle power and the high-power wireless charging, to be implemented under the same distance, the wireless charging of receiving formula than traditional single-shot list has more high efficiency and more high-power charge characteristic; Alleviate the load of individual transmitter simultaneously, reduced the design difficulty of high-power wireless charging device.
Background technology
Wireless charging is very popular in recent years research direction; From early stage induction type can wireless charging electric toothbrush and electric shaver finally can be Powermat (" wireless charging plate ") the wireless charging suit of cell-phone charging; Finally Palm pre (fat pears intelligent radio charge mobile phone) wireless charging mobile phone again; The wireless charger that nowadays many brands have been arranged on the market; No small raising has all been arranged, on September 1st, 2010, global first promotion from charge power, charge efficiency or property easy to use aspect The wireless charging technologyStandardization body---wireless charging alliance exists BeijingDeclaration takes the lead in Qi (wireless charging alliance) wireless charging international standard to introduce China, also unite all types of mobile phone wireless charger of having released accord with Q i standard at present with each major company, but the effective wireless charging of these products distance all not far (in 1cm), promptly all requiring equipment to be charged and emitter is that charging panel is close to.Powerful wireless charging device is owing to the power amplifier module to emitter has higher power and efficient requirement, at present still in the middle of research.Multiple single receipts formula wireless energy transform device that we invented can solve the excessive problem of individual transmitter load in the high-power wireless charging; Design difficulty through a plurality of transmitters provide wireless energy to reduce individual transmitter to receiver simultaneously can further increase substantially efficiency of transmission under the situation that has improved gross output.Simultaneously since the utility model can keep extending transmission distance under the situation of identical traffic efficient, be applicable to too small-power and in the power wireless charging use.
Summary of the invention
Technical problem:The purpose of the utility model provides the wireless energy transform device of the single receipts formula of a kind of pilosity; This device can solve the excessive problem of individual transmitter load in the high-power wireless charging; Design difficulty through a plurality of transmitters provide wireless energy to reduce individual transmitter to receiver simultaneously can further increase substantially efficiency of transmission under the situation that has improved gross output.Simultaneously since the utility model can keep extending transmission distance under the situation of identical traffic efficient, be applicable to too small-power and in the power wireless charging use.
Technical scheme:For solving the problems of the technologies described above, the utility model provides the wireless energy transform device of the single receipts formula of a kind of pilosity, and this device comprises at least two emitters and a receiving system;
Wherein each emitter comprises high frequency power source and transmitting coil Lt, also comprises the emission impedance matching network, and a side of this emission impedance matching network is connected with the high frequency power source two ends, and opposite side is connected with transmitting coil Lt two ends; Transmitting coil Lt comprises high parasitic resistance R pt;
Receiving system comprises receiving coil Lr and load RL, also comprises the reception impedance matching network, and a side of this reception impedance matching network is connected with receiving coil Lr two ends, and opposite side is connected with load RL; Wherein receiving coil Lr comprises high parasitic resistance R pr;
Described emitter is used for the higher-order of oscillation power signal that high frequency power source produces is launched with the form of near field electromagnetic ripple;
Described receiving system is used for the higher-order of oscillation power signal that the receiving and transmitting unit transmitting coil sends, and passes to load RL through behind the rectifying and wave-filtering then.
Preferably, said emitter is 3, is respectively first emitter, second emitter and the 3rd emitter; The transmitting coil of each emitter is the first transmitting coil Lt1, the second transmitting coil Lt2 and the 3rd transmitting coil Lt3; The first transmitting coil Lt1, the second transmitting coil Lt2 and the 3rd transmitting coil Lt3;
Coupling coefficient between the first transmitting coil Lt1, the second transmitting coil Lt2 and the 3rd transmitting coil Lt3 and the receiving coil is respectively kt1r, kt2r and ktn3, and said energy transform device is operated in resonance frequency omega.
Beneficial effect:Compared with prior art, the utlity model has following advantage:
Under identical distance; Compare traditional single-shot list and receive the wireless energy transfer mode of formula, the utility model can significantly improve wireless energy transmission efficiency, improves through-put power simultaneously; Reduced the transmitting power of individual transmitter, for the high-power wireless power transfer provides feasibility;
Under identical efficiency of transmission, compare the wireless energy transfer mode that the single-shot list is received formula, the utility model can significant prolongation wireless energy transfer distance, makes the remote-wireless power transfer become possibility.
Description of drawings
Fig. 1 is the system block diagram of the utility model device;
Fig. 2 is the circuit diagram under receiver situation of two transmitters in the utility model;
The curve chart that Fig. 3 changes with the transmitter number change for the network transmission efficiency of the utility model;
The wireless energy transfer circuit diagram of multiple single receipts formula of a kind of series-parallel impedance matching network that Fig. 4 provides for the utility model;
Fig. 5 is two bills are received and the single-shot list is received the emulation and the theoretical comparison diagram of the utility model;
Fig. 6 is two bills are received and the single-shot list is received the experiment and the theoretical comparison diagram of the utility model;
Efficient that is coupled between the consideration transmitter of Fig. 7 for the two bills receipts of the utility model and input impedance are with coupling
Syzygy is counted the curve chart that kt1t2 changes;
Efficient that is coupled between the consideration transmitter of Fig. 8 for the two bills receipts of the utility model and input impedance are with coupling
Syzygy is counted the curve chart (through reducing the problem of equivalent capacity solution input impedance matching in the transmitting terminal impedance matching network) that kt1t2 changes.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified.
Referring to Fig. 1, the wireless energy transform device of multiple single receipts formula that the utility model provides, this device comprise at least two emitters and a receiving system;
Wherein each emitter comprises high frequency power source and transmitting coil Lt, also comprises the emission impedance matching network, and a side of this emission impedance matching network is connected with the high frequency power source two ends, and opposite side is connected with transmitting coil Lt two ends; Transmitting coil Lt comprises high parasitic resistance R pt;
Receiving system comprises receiving coil Lr and load RL, also comprises the reception impedance matching network, and a side of this reception impedance matching network is connected with receiving coil Lr two ends, and opposite side is connected with load RL; Wherein receiving coil Lr comprises high parasitic resistance R pr;
Described emitter is used for the higher-order of oscillation power signal that high frequency power source produces is launched with the form of near field electromagnetic ripple;
Described receiving system is used for the higher-order of oscillation power signal that the receiving and transmitting unit transmitting coil sends, and passes to load RL through behind the rectifying and wave-filtering then.
Said emitter is 3, is respectively first emitter, second emitter and the 3rd emitter; The transmitting coil of each emitter is the first transmitting coil Lt1, the second transmitting coil Lt2 and the 3rd transmitting coil Lt3; The first transmitting coil Lt1, the second transmitting coil Lt2 and the 3rd transmitting coil Lt3;
Coupling coefficient between the first transmitting coil Lt1, the second transmitting coil Lt2 and the 3rd transmitting coil Lt3 and the receiving coil is respectively kt1r, kt2r and ktn3, and said energy transform device is operated in resonance frequency omega.
At first we do not consider the coupling between the transmitter:
Two transmitters are discussed earlier here, the situation of a receiver, as shown in Figure 2:
According to Kirchhoff's second law, at first to the receiver row KCL equation on two transmitters in the left side and the right:
Figure 2012201939386100002DEST_PATH_IMAGE002
Figure DEST_PATH_IMAGE004
Figure DEST_PATH_IMAGE006
Wherein V1 and V2 are respectively the voltage amplitude values of the sine wave that sends of the high frequency power source of transmitter 1 and transmitter 2, and I1, I2 and I3 are respectively the loop currents of transmitter 1, transmitter 2 and receiver, C Eqt1And C Eqt2Be respectively the equivalent capacity after the impedance matching network utilization Dai Weinan equivalent theorem equivalence of transmitter, C EqrAnd R EqrBe respectively equivalent capacity and the equivalent resistance after the impedance matching network utilization Dai Weinan equivalent theorem equivalence of receiver, M T1rAnd M T2rIt is respectively the mutual inductance between transmitter 1 and transmitter 2 and the receiver.
When resonance condition
Figure DEST_PATH_IMAGE008
Figure DEST_PATH_IMAGE012
Consider two transmitters identical and with the equidistant situation of receiver:
Figure DEST_PATH_IMAGE014
Figure DEST_PATH_IMAGE016
Figure DEST_PATH_IMAGE018
Figure DEST_PATH_IMAGE020
Figure DEST_PATH_IMAGE022
We obtain
Figure DEST_PATH_IMAGE008A
Figure DEST_PATH_IMAGE024
Can solve receiver and be coupled to the equivalent resistance R of transmitter 1And R 2Be respectively
Figure DEST_PATH_IMAGE026
Next the efficient of our solving system defines the power that the Pin high frequency power source is exported, and P1 and P2 are respectively the equivalent resistance R that receiver is coupled to transmitter 1And R 2The power of last acquisition, Pr are that load RL (both passed through impedance matching network conversion after equivalent resistance Reqr) goes up the power that obtains, and η is the total efficiency of transmission of system.
Figure DEST_PATH_IMAGE028
Figure DEST_PATH_IMAGE030
Figure DEST_PATH_IMAGE032
When the parameter of transmitting coil and receiving coil (is L T1, L r, R Pt1And R Pr), the coupling coefficient k between the coil T1rAnd the power-frequency ω of system given after, can find out that promptly system total efficiency η only contains R EqrA variable gets maximum in order to ask η, we with expression formula η to R EqrDifferentiate draws and works as
Figure DEST_PATH_IMAGE034
η has maximum
Figure DEST_PATH_IMAGE036
Q wherein Eq2It is the equivalent Q value of 2 transmitters.
Figure DEST_PATH_IMAGE038
By that analogy for n identical transmitting coil, when
Figure DEST_PATH_IMAGE040
η has maximum
Figure DEST_PATH_IMAGE042
Q wherein EqnIt is the equivalent Q value of n transmitter.
Figure DEST_PATH_IMAGE044
Can find out and increase the equivalent Q value Q of n transmitter along with transmitter quantity EqnBe
Figure DEST_PATH_IMAGE048
Multiplication is long, and the maximum total efficiency of transmission of system is along with Q EqnIncrease and increase.Therefore transmitter quantity is many more, and system total efficiency is high more.In order more significantly to show this effect, the situation that we adopt Matlab to come 1 to 10 transmitter of emulation, the concrete parameter of emitter and receiving system is as shown in table 1.
Table 1
f κ Lt Rpt Lr Rpr
4MHz 0.008 5μH 0.4 ohms 30μH 2.3 ohms
Can find out that through Fig. 3 efficient has only 46.7% when having only 1 transmitter, and efficient reaches 78% when efficient reaches 58%, 10 transmitter in the time of two transmitters, the lifting of efficient is very considerable.
In order in reality, to let the high frequency power source operate as normal, need to adopt suitable impedance matching network, we provide a kind of series-parallel impedance matching network here, and are as shown in Figure 4.
In order to verify the lifting of the utility model, carry out simulating, verifying through ADS (Advance Design System) software to efficient.For consistent with the method for actual experiment, the figure service efficiency appears with the form that Reqr changes as a result.Twice artificial circuit all adopts series resonant circuit as shown in Figure 2, and parameter is specifically as shown in table 2, and simulation result and theoretical reduced value are as shown in Figure 5.
Table 2
The result can see that ADS emulation and Theoretical Calculation result coincide finely, explain that the Theoretical Calculation result is correct.Can also see the efficient high about 10% of the efficient of two bills receipts models than single-shot list receipts model.Through software emulation, certain check has been done in the theoretical derivation of the utility model, verified that the efficient of two bills receipts models is higher than the efficient that the single-shot list is received model.
Through testing the situation of verifying that two bills are received and the single-shot list is received, wherein the circuit in twice experiment all adopts series resonant circuit as shown in Figure 2 below, and parameter is specifically as shown in table 3, and experiment measuring value and theoretical reduced value are as shown in Figure 6.
Table 3
In the error allowed band, the actual experiment result can find out that the efficient that two bills are received circuit is higher than the efficient that the single-shot list is received circuit.But because side circuit can't accomplish to require symmetry completely, and the existence of experimental error, the efficiency curve and the theoretical curve of actual experiment do not fit like a glove, but experiment value fluctuates near theoretical value basically, and the illustrative experiment precision is higher.This experimental circuit is for the efficiency variance of testing two kinds of structures designs, thereby circuit efficient this moment is lower.This is the result who painstakingly reduces Qeqn in order to reflect difference.
Consider more general situation now, promptly consider the coupling between the transmitter:
Two transmitters are discussed earlier here, the situation of a receiver, as shown in Figure 2:
The efficiency of transmission of entire circuit can be write as
Two input impedance that emitter is seen into from high frequency power source Z In For
Figure DEST_PATH_IMAGE056
Suppose two coupling k between the transmitting coil this moment T1t2Change from small to big (scope), the remaining circuit parameter is as shown in table 4, and we are through the situation of change that the Matlab written program is watched this moment efficiency of transmission and input impedance, and are as shown in Figure 7.
Table 4
Lt1=Lt2=Ltr 4uH Reqr 8.886
Ceqt1=Ceqt2=Ceqr 253pF f 5MHz
Rpt1=Rpt2=Rpr 0.3 ohms kt1r=kt2r 0.05
Can find that efficiency of transmission is not with the coupling k between the transmitting coil T1t2Change just input impedance Z In Imaginary part can be along with k T1t2Increase and become big, and real part is 8.886 ohms all the time, it is 93.47% constant that system transmissions efficient also remains at, but because along with the increase of kt1t2, there is bigger imaginary part in Zin, in reality, can make normally power output of high frequency power source.
In order to address this problem, we attempt the equivalent capacity in the impedance matching network of emitter is reduced.Here we are reduced to 203pF with Ceq1 and Ceq2, still watch the situation of change of this moment efficiency of transmission and input impedance through the Matlab coding.As shown in Figure 8.Can find out that when kt1t2 equaled 0.246, the imaginary part of input impedance Zin was zero just, high frequency power source is power output normally, the same when the efficiency of transmission of system and is not before considered to be coupled between the transmitter yet.
The above is merely the preferred embodiments of the utility model; The protection range of the utility model does not exceed with above-mentioned execution mode; As long as the equivalence that those of ordinary skills do according to the utility model institute disclosure is modified or changed, all should include in the protection range of putting down in writing in claims.

Claims (2)

1. the wireless energy transform device of the single receipts formula of pilosity, it is characterized in that: this device comprises at least two emitters and a receiving system;
Wherein each emitter comprises high frequency power source and transmitting coil Lt, also comprises the emission impedance matching network, and a side of this emission impedance matching network is connected with the high frequency power source two ends, and opposite side is connected with transmitting coil Lt two ends; Transmitting coil Lt comprises high parasitic resistance R pt;
Receiving system comprises receiving coil Lr and load RL, also comprises the reception impedance matching network, and a side of this reception impedance matching network is connected with receiving coil Lr two ends, and opposite side is connected with load RL; Wherein receiving coil Lr comprises high parasitic resistance R pr;
Described emitter is used for the higher-order of oscillation power signal that high frequency power source produces is launched with the form of near field electromagnetic ripple;
Described receiving system is used for the higher-order of oscillation power signal that the receiving and transmitting unit transmitting coil sends, and passes to load RL through behind the rectifying and wave-filtering then.
2. the wireless energy transform device of the single receipts formula of pilosity according to claim 1, it is characterized in that: said emitter is 3, is respectively first emitter, second emitter and the 3rd emitter; The transmitting coil of each emitter is the first transmitting coil Lt1, the second transmitting coil Lt2 and the 3rd transmitting coil Lt3; The first transmitting coil Lt1, the second transmitting coil Lt2 and the 3rd transmitting coil Lt3;
Coupling coefficient between the first transmitting coil Lt1, the second transmitting coil Lt2 and the 3rd transmitting coil Lt3 and the receiving coil is respectively kt1r, kt2r and ktn3, and said energy transform device is operated in resonance frequency omega.
CN2012201939386U 2012-05-03 2012-05-03 Multi-transmitting single-receiving type wireless energy transmission device Expired - Lifetime CN202565039U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102664468A (en) * 2012-05-03 2012-09-12 东南大学 Multi-transmission single-receiving wireless energy transmission device
CN105141044A (en) * 2015-10-09 2015-12-09 东南大学 Double-source wireless power supply system parameter online detection and power supply cooperative control method
CN105391190A (en) * 2015-11-17 2016-03-09 东南大学 Double-source wireless power supply system spacing optimization method based on minimum power fluctuation standard deviation
CN105632743A (en) * 2016-03-25 2016-06-01 东莞市华盾电子科技有限公司 Coil structure for through-type detector and detector formed from coil structure
CN106663966A (en) * 2014-06-10 2017-05-10 联发科技（新加坡）私人有限公司 Multi-mode wireless power transmitter
CN109067013A (en) * 2018-09-14 2018-12-21 中南大学 Wireless electric energy transmission device and its method of electric energy transfer for mine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102664468A (en) * 2012-05-03 2012-09-12 东南大学 Multi-transmission single-receiving wireless energy transmission device
CN106663966A (en) * 2014-06-10 2017-05-10 联发科技（新加坡）私人有限公司 Multi-mode wireless power transmitter
CN105141044A (en) * 2015-10-09 2015-12-09 东南大学 Double-source wireless power supply system parameter online detection and power supply cooperative control method
CN105391190A (en) * 2015-11-17 2016-03-09 东南大学 Double-source wireless power supply system spacing optimization method based on minimum power fluctuation standard deviation
CN105391190B (en) * 2015-11-17 2018-03-13 东南大学 Based on the double source wireless power supply system spacing optimization method that power swing standard deviation is minimum
CN105632743A (en) * 2016-03-25 2016-06-01 东莞市华盾电子科技有限公司 Coil structure for through-type detector and detector formed from coil structure
CN109067013A (en) * 2018-09-14 2018-12-21 中南大学 Wireless electric energy transmission device and its method of electric energy transfer for mine

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