CN203151238U - Multi-reception-end magnetic coupling wireless energy transmission system - Google Patents
Multi-reception-end magnetic coupling wireless energy transmission system Download PDFInfo
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- CN203151238U CN203151238U CN2013200520295U CN201320052029U CN203151238U CN 203151238 U CN203151238 U CN 203151238U CN 2013200520295 U CN2013200520295 U CN 2013200520295U CN 201320052029 U CN201320052029 U CN 201320052029U CN 203151238 U CN203151238 U CN 203151238U
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Abstract
The utility model discloses a multi-reception-end magnetic coupling wireless energy transmission system. The multi-reception-end magnetic coupling wireless energy transmission system comprises multiple reception circuits, a control circuit, a driving circuit controlled by the control circuit and an emission circuit, wherein the emission circuit comprises an emission coil, multiple resonant capacitor branch circuits connected in parallel with the emission circuit, a frequency switch which is connected in series with the emission coil and is driven by the driving circuit, an alternating current power source which supplies power for a circuit formed by connecting the emission coil in series with the frequency switch, and each resonant capacitor branch circuit comprises an emission end resonant capacitor and a branch circuit switch which is connected in series with the emission end resonant capacitor and is controlled by the control circuit. The multi-reception-end magnetic coupling wireless energy transmission system realizes electric energy transmission to the designated one of the multiple reception ends by utilizing the single emission coil; the multi-reception-end magnetic coupling wireless energy transmission system has capability of realizing electric energy transmission to all the reception ends while realization of wireless power supply for only one reception end under one state is guaranteed; and the multi-reception-end magnetic coupling wireless energy transmission system has a practical structure, is easy to realize and greatly reduces cost.
Description
Technical field
The utility model relates to a kind of wireless energy transfer system, is specifically related to a kind of many receiving terminals magnetic coupling wireless energy transfer system, belongs to the wireless energy transfer field.
Background technology
Non-radiation type magnetic coupling resonance is as the novel radio power supply technique, produces very strong intercoupling by the resonance object that makes two same frequencys, and the receiving terminal of disresonance frequence is on every side had only more weak coupling.The magnetic coupling resonator system comprises the emission resonance coil, secondaryly accepts resonance coil and load.The Marin Soljacic assistant professor of MIT is the utility model person of this system, and wireless power has been demonstrated by its MIT research group, and they have successfully lighted the 60W bulb from 2 meters distance.The magnetic coupling harmonic technology can be realized the energy transmission of middle distance (mid-range), and do not need to strengthen magnetic field intensity, and traditional magnetic coupling can only (generally at ten centimetres) obtain good relatively effect in short-range, and transmission range can only increase by strengthening magnetic field intensity.Simultaneously the magnetic resonance coupled system has an important advantage can penetrate the nonmetal barrier of various differences exactly, and to not influences of index such as the energy transmission efficiency of system, power.
Existing technology transmitting coil of research mostly provides electric energy simultaneously corresponding to a plurality of different receiving terminals with identical resonance frequency.At some occasion (as the external power supply unit of a plurality of implanteds, LED color lamp etc.), we need provide electric energy to guarantee Electrical Safety separately or produce a desired effect for a plurality of different load receiving terminals, if adopt a plurality of emission resonance coils then volume and the cost of system all can increase.
The utility model content
Be to solve the deficiencies in the prior art, the purpose of this utility model be to provide a kind of only adopt single transmitting coil both realized single transmitting terminal in a plurality of receiving terminals only that of appointment magnetic coupling wireless energy transfer system of electric energy transmission is provided.
In order to realize above-mentioned target, the utility model adopts following technical scheme:
Many receiving terminals magnetic coupling wireless energy transfer system comprises, and: N+1 accepts circuit, and each is accepted circuit and comprises a receiving coil, and it also comprises: control circuit, be controlled drive circuit, a radiating circuit of circuit control; Radiating circuit comprises: transmitting coil, N and the resonant capacitance branch road of transmitting coil parallel connection, the frequency switching that is subjected to the drive circuit driving of connecting with transmitting coil, the circuit that is in series for transmitting coil and frequency switching provide the AC power of electric energy; The resonant capacitance branch road comprises: a transmitting terminal resonant capacitance and a branch switch that is controlled circuit control of connecting with it, the span of N is the natural number more than or equal to 1.
Further, control circuit is respectively drive circuit and branch switch provides actuating signal, and drive circuit is accepted the actuating signal of control circuit, and the driving frequency switch carries out the switch motion of high frequency.
Further, accepting circuit also comprises: receiving terminal resonant capacitance and the load in parallel with receiving coil.
Further, the resonant inductance amount of transmitting coil and receiving coil equates.
Further, the value of N is 2, comprise that namely 3 are accepted circuit and 2 resonant capacitance branch roads, 3 receiving terminal resonant capacitances of accepting in the circuit are respectively the first receiving terminal resonant capacitance, the second receiving terminal resonant capacitance, the first receiving terminal resonant capacitance, and the transmitting terminal resonant capacitance in 2 resonant capacitance branch roads is respectively the first transmitting terminal resonant capacitance and the second transmitting terminal resonant capacitance; The first receiving terminal resonant capacitance equates with the resonant capacitance value of the first transmitting terminal resonant capacitance, the second receiving terminal resonant capacitance equates that with the resonant capacitance value of the second transmitting terminal resonant capacitance resonant capacitance value of the 3rd receiving terminal resonant capacitance equals the resonant capacitance value of the first transmitting terminal resonant capacitance and the resonant capacitance value sum of the second transmitting terminal resonant capacitance.
Further, the resonant inductance amount of above-mentioned transmitting coil is 22 μ H; The resonant capacitance value of the first transmitting terminal resonant capacitance is 470nF, and the resonant capacitance value of the second transmitting terminal resonant capacitance is 220nF.
Further, branch switch is relay switch, and frequency switching is fet switch, and control circuit includes the DSP control chip, and drive circuit includes the IR2100 chip.
Usefulness of the present utility model is: provide a kind of only adopt single transmitting coil both realized single transmitting terminal in a plurality of receiving terminals only that of appointment magnetic coupling wireless energy transfer system of electric energy transmission is provided, system of the present utility model possesses for all receiving terminals to be provided under the prerequisite of ability of wireless power transmission, can guarantee under a kind of state only a receiving terminal to be realized wireless power, its structure practicality, be easy to realize and greatly reduce cost.
Description of drawings
Fig. 1 is the electrical block diagram of many receiving terminals of preferred embodiment magnetic coupling wireless energy transfer system of the present utility model;
Fig. 2 is the electrical block diagram when branch switch S1 conducting is only arranged embodiment illustrated in fig. 1;
Fig. 3 is the electrical block diagram when branch switch S2 conducting is only arranged embodiment illustrated in fig. 1;
Electrical block diagram when Fig. 4 is the equal conducting of branch switch S1 embodiment illustrated in fig. 1 and S2.
The implication of Reference numeral among the figure:
1,2,3-accepts circuit; The 4-radiating circuit; The 5-control circuit; The 6-drive circuit;
The V1-AC power;
The C1-first transmitting terminal resonant capacitance; The C2-second transmitting terminal resonant capacitance; The C3-first receiving terminal resonant capacitance; The C4-second receiving terminal resonant capacitance; C5-the 3rd receiving terminal resonant capacitance;
The L1-transmitting coil; L2, L3, L4-receiving coil;
R1, R2, R2-load;
S1, S2-branch switch; The S3-frequency switching.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done concrete introduction.
With reference to shown in Figure 1, many receiving terminals magnetic coupling wireless energy transfer system of the present utility model mainly comprises: a plurality of circuit (1,2,3), a radiating circuit 4, a control circuit 5, drive circuits 6 accepted.
Each is accepted circuit and comprises: a receiving coil (L2, L3, L4) and in parallel receiving terminal resonant capacitance (C3, C4, C5) and load (R1, R2, R2) with it, and as preferably, a wherein end ground connection of load (R1, R2, R2).
The number of accepting resonant capacitance branch road in the number (being the number of receiving terminal) of circuit (1,2,3) and the radiating circuit 4 should satisfy such relation, if accepting the number of circuit (1,2,3) is N+1, then the resonant capacitance number of branches is N in the radiating circuit 4, and wherein N is the natural number more than or equal to 1.So, the number of resonant capacitance branch road must make it have the mode that the N+1 kind inserts combination in the radiating circuit 4, can satisfy the needs of accepting circuit (1,2,3) transmission energy for N+1 certainly.We can be implemented in a kind of mode that inserts combination and only make to accept the identical close coupling effect of circuit (1 or 2 or 3) generation resonance frequency by suitably disposing resonant capacitance value and the resonant capacitance value of receiving terminal resonant capacitance (C3, C4, C5) and the resonant inductance amount of transmitting coil L1 and receiving coil (L2, L3, L4) of transmitting terminal resonant capacitance (C1, C2).
At the product of the resonant capacitance value of a certain resonant inductance amount of accepting the receiving coil (L2 or L3 or L4) in the circuit (1 or 2 or 3) and receiving terminal resonant capacitance (C3 or C4 or the C5) transmitting terminal resonant capacitance (C1 at the radiating circuit 4 that satisfies the resonant inductance amount that equals transmitting coil L1 and access, during the condition of the product of total resonant capacitance value C2) (when the switching frequency of drive circuit 6 driving frequency switch S 3 work this moment equals the resonance frequency of radiating circuit this moment), their resonance frequency ability is identical, and (resonance frequency is only relevant with the product of capacitance and inductance value when coil and electric capacity parallel connection, other are constant in this computing formula), this receiving coil (L2 or L3 or L4) of accepting circuit (1 or 2 or 3) just can produce stronger coupling, thereby this just offers we select to need to take place close coupling according to our wish by the product of coupling resonant inductance amount and resonance capacitance the possibility of accepting circuit (1 or 2 or 3).
For reduction procedure, when we set all resonant inductance amounts of accepting the receiving coil (L2, L3, L4) in the circuit (1,2,3) and are equal to the resonant inductance amount of transmitting coil L1, the number of the resonant capacitance branch road that inserts in the control radiating circuit 4, make access all transmitting terminal resonant capacitances (C1, C2) the resonant capacitance value and equate that with a certain resonant capacitance value of accepting the receiving terminal resonant capacitance (C3 or C4 or C5) of circuit (1 or 2 or 3) radiating circuit 4 can be realized selectively a certain circuit (1 or 2 or 3) of accepting is carried out energy and transmitted.
As shown in Figure 1, we are that the utility model of embodiment of 2 is further detailed with the value of N, comprise in system of the present utility model that namely 3 are accepted circuit and 2 resonant capacitance branch roads, 3 receiving terminal resonant capacitances of accepting in the circuit are respectively the first receiving terminal resonant capacitance C3, the second receiving terminal resonant capacitance C4, the first receiving terminal resonant capacitance C3, and the transmitting terminal resonant capacitance in 2 resonant capacitance branch roads is respectively the first transmitting terminal resonant capacitance C1 and the second transmitting terminal resonant capacitance C2; The first receiving terminal resonant capacitance C3 equates with the resonant capacitance value of the first transmitting terminal resonant capacitance C1, the second receiving terminal resonant capacitance C4 equates that with the resonant capacitance value of the second transmitting terminal resonant capacitance C2 resonant capacitance value of the 3rd receiving terminal resonant capacitance C5 equals the resonant capacitance value of the first transmitting terminal resonant capacitance C1 and the resonant capacitance value sum of the second transmitting terminal resonant capacitance C2; The resonant inductance amount of transmitting coil L1 and receiving coil (L2, L3, L4) equates.
Such as, the resonant capacitance value of the first transmitting terminal resonant capacitance C1, the second transmitting terminal resonant capacitance C2 is respectively 470nF and 220nF, the resonant capacitance value of the first receiving terminal resonant capacitance C3, the second receiving terminal resonant capacitance C4 then is respectively 470nF and 220nF so, and the capacitance of the 3rd receiving terminal resonant capacitance C5 then is 690 nF.The resonant inductance amount of transmitting coil L1 and all receiving coil (L2, L3, L4) is 22 μ H.
So, as shown in Figure 2, when we insert the resonant capacitance branch road at the first transmitting terminal resonant capacitance C1 place separately, it is branch switch S1 conducting, and another branch switch S2 is when disconnecting, and control circuit 5 control drive circuits 6 make its switching frequency of providing for frequency switching S3 equal the resonance frequency of radiating circuit 4 under this state.
When the resonant capacitance branch road at the aforesaid independent access first transmitting terminal resonant capacitance C1 place, it is branch switch S1 conducting, and another branch switch S2 is when closing, owing to only insert the first transmitting terminal resonant capacitance C1, so total resonant capacitance value that its resonant capacitance value just inserts in the radiating circuit 4, so accept in the circuit (1,2,3) at three, have only the receiving coil L2 that accepts circuit 1 at the first receiving terminal resonant capacitance C3 place can be in the close coupling state, realize the energy transmission.
As shown in Figure 3, when branch switch S1 disconnection, another branch switch S2 conducting, control circuit 5 is also controlled drive circuit 6 makes its switching frequency of providing for frequency switching S3 equal the resonance frequency of radiating circuit 4 under this state, according to same principle, have only the receiving coil L3 that accepts circuit 2 at the second receiving terminal resonant capacitance C4 place can be in the close coupling state this moment, realizes the energy transmission.
As shown in Figure 4, the equal conducting of branch switch S1, S2, control circuit 5 is also controlled drive circuit 6 makes its switching frequency of providing for frequency switching S3 equal the resonance frequency of radiating circuit 4 under this state, according to same principle, have only the receiving coil L4 that accepts circuit 3 at the 3rd receiving terminal resonant capacitance C5 place can be in the close coupling state this moment, realizes the energy transmission.
To sum up, we insert total resonant capacitance value of the transmitting terminal resonant capacitance in the radiating circuit 4 to obtain different resonance frequencys by setting, have only transmitting coil L1 and receiving coil (L2 or L3 or L4) to have identical resonance frequency and can obtain more intense coupling, and other receiving coils of accepting circuit are in weak-coupling state, therefore can realize giving separately the function of certain load end power supply.By such design, just can reduce cost and the volume of wireless electric energy transmission device greatly, improved system reliability.
Advantage of the present utility model is tangible, such as in medical field, if patient is implanted into a plurality of loads that need wirelessly transmitting electrical energy, in order to guarantee safety, we wish only one of them to be charged at every turn and influence other receiving terminal, and system of the present utility model can well realize this target undoubtedly.
As a kind of preferred version, branch switch (S1, S2) is relay switch, they can directly be controlled by control circuit 5, and frequency switching S3 is fet switch, it needs drive circuit 6 for it provides high-frequency drive, so control circuit 5 is by control drive circuit 6 indirect control frequency switch S 3.
As a kind of preferred version, the magnitude of voltage of the alternating voltage that AC power V1 provides is 24V, control circuit 5 includes the DSP control chip, its concrete model can be DSP TMS320F2812, then adopt the IR2100 chip as driving chip in the drive circuit 6, the concrete model of frequency switching S3 can adopt IPB108N15N3G.
More than show and described basic principle of the present utility model, principal character and advantage.The technical staff of the industry should understand, and above-described embodiment does not limit the utility model in any form, and all employings are equal to replaces or technical scheme that the mode of equivalent transformation obtains, all drops in the protection range of the present utility model.
Claims (10)
1. many receiving terminals magnetic coupling wireless energy transfer system, comprise: accept circuit for N+1, each described circuit of accepting comprises a receiving coil, it is characterized in that, also comprises: control circuit, be subjected to drive circuit, a radiating circuit of the control of described control circuit; Described radiating circuit comprises: transmitting coil, N and the resonant capacitance branch road of described transmitting coil parallel connection, the frequency switching that is subjected to described drive circuit driving of connecting with described transmitting coil, the circuit that is in series for described transmitting coil and frequency switching provide the AC power of electric energy; Described resonant capacitance branch road comprises: a transmitting terminal resonant capacitance and a branch switch that is subjected to described control circuit control of connecting with it, the span of described N is the natural number more than or equal to 1.
2. many receiving terminals magnetic coupling wireless energy transfer system according to claim 1, it is characterized in that, described control circuit is respectively described drive circuit and branch switch provides actuating signal, described drive circuit is accepted the actuating signal of described control circuit, and drives the switch motion that described frequency switching carries out high frequency.
3. many receiving terminals magnetic coupling wireless energy transfer system according to claim 1 and 2 is characterized in that, the described circuit of accepting also comprises: receiving terminal resonant capacitance and the load in parallel with described receiving coil.
4. many receiving terminals magnetic coupling wireless energy transfer system according to claim 3 is characterized in that, the resonant inductance amount of described transmitting coil and receiving coil equates.
5. many receiving terminals magnetic coupling wireless energy transfer system according to claim 3, it is characterized in that, the value of described N is 2, comprise that namely 3 are accepted circuit and 2 resonant capacitance branch roads, 3 receiving terminal resonant capacitances of accepting in the circuit are respectively the first receiving terminal resonant capacitance, the second receiving terminal resonant capacitance, the first receiving terminal resonant capacitance, and the transmitting terminal resonant capacitance in 2 resonant capacitance branch roads is respectively the first transmitting terminal resonant capacitance and the second transmitting terminal resonant capacitance; The described first receiving terminal resonant capacitance equates with the resonant capacitance value of the first transmitting terminal resonant capacitance, the described second receiving terminal resonant capacitance equates that with the resonant capacitance value of the second transmitting terminal resonant capacitance resonant capacitance value of described the 3rd receiving terminal resonant capacitance equals the resonant capacitance value of the described first transmitting terminal resonant capacitance and the resonant capacitance value sum of the second transmitting terminal resonant capacitance.
6. many receiving terminals magnetic coupling wireless energy transfer system according to claim 5 is characterized in that, the resonant inductance amount of above-mentioned transmitting coil is 22 μ H; The resonant capacitance value of the first transmitting terminal resonant capacitance is 470nF, and the resonant capacitance value of the second transmitting terminal resonant capacitance is 220nF.
7. many receiving terminals magnetic coupling wireless energy transfer system according to claim 1 and 2 is characterized in that described branch switch is relay switch.
8. many receiving terminals magnetic coupling wireless energy transfer system according to claim 1 and 2 is characterized in that described frequency switching is fet switch.
9. many receiving terminals magnetic coupling wireless energy transfer system according to claim 1 and 2 is characterized in that described control circuit includes the DSP control chip.
10. many receiving terminals magnetic coupling wireless energy transfer system according to claim 1 and 2 is characterized in that described drive circuit includes the IR2100 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200520295U CN203151238U (en) | 2013-01-30 | 2013-01-30 | Multi-reception-end magnetic coupling wireless energy transmission system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200520295U CN203151238U (en) | 2013-01-30 | 2013-01-30 | Multi-reception-end magnetic coupling wireless energy transmission system |
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| CN203151238U true CN203151238U (en) | 2013-08-21 |
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| CN2013200520295U Expired - Lifetime CN203151238U (en) | 2013-01-30 | 2013-01-30 | Multi-reception-end magnetic coupling wireless energy transmission system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852478A (en) * | 2015-05-28 | 2015-08-19 | 天津工业大学 | Identity identification circuit |
| CN104852477A (en) * | 2015-05-28 | 2015-08-19 | 天津工业大学 | Resonance decoupling circuit |
-
2013
- 2013-01-30 CN CN2013200520295U patent/CN203151238U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852478A (en) * | 2015-05-28 | 2015-08-19 | 天津工业大学 | Identity identification circuit |
| CN104852477A (en) * | 2015-05-28 | 2015-08-19 | 天津工业大学 | Resonance decoupling circuit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130821 |