CN105245035A - Frequency changer circuit based on magnetic resonance coupling wireless power transmission - Google Patents
Frequency changer circuit based on magnetic resonance coupling wireless power transmission Download PDFInfo
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- CN105245035A CN105245035A CN201510739095.3A CN201510739095A CN105245035A CN 105245035 A CN105245035 A CN 105245035A CN 201510739095 A CN201510739095 A CN 201510739095A CN 105245035 A CN105245035 A CN 105245035A
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- China
- Prior art keywords
- power transmission
- wireless power
- capacitance
- power electronics
- current switch
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Abstract
The invention discloses a frequency changer circuit based on magnetic resonance coupling wireless power transmission. The circuit realizes wireless power transmission through magnetic resonance coupling; the resonance frequencies of primary and secondary sides are synchronously changed by synchronously changing the capacitance of primary and secondary side resonance capacitors to realize frequency change. In each of the primary side resonance capacitor and the secondary side resonance capacitor, a resonance capacitor bank transformation module is formed by more than one capacitor controlled by an electronic power switch; the circuit controls and transforms the capacitance of a resonance capacitor bank by controlling all alternating-current electronic power switches on the primary side and the secondary side to control and transform the capacitance of the primary and secondary side resonance capacitors, and finally changes the resonance frequency of wireless power transmission. The circuit realizes transformation of the resonance frequency of wireless power transmission by adopting alternating-current electronic power switch controlled capacitance change technology; and the circuit is novel in structure, reliable and practical. The circuit can be used in all fields of wireless power transmission, and can be widely applied under the occasions of architecture electrics, green energy, household appliances, chargers and the like.
Description
Technical field
The present invention relates to a kind of frequency changer circuit based on magnetic resonance coupling wireless power transmission, belong to wireless power transmission converter technique field.
Background technology
Magnetic resonance coupling wireless power transmission technology adopts high-frequency resonant coupling scheme, requires that former limit sends coil identical with the resonance frequency of secondary receiving coil or close.Magnetic resonance coupling wireless power transmission technology in actual use, during different former and deputy back gauge, has different systems when former and deputy limit resonance frequency is different and accepts efficiency.Distance synchronous adjustment resonance frequency as different to former and deputy limit can improve system effectiveness.Technique can improve availability and the flexibility of Radio Transmission Technology, promotes the development of radio energy technology, has good application prospect.
In load and resonance frequency, correlative study is had in wireless power transmission technology, wherein have and adopt phased dynamic switch inductance scheme with the method making output voltage constant under varying load operating mode, as M.Yang, X.Li, Z.Ao, Y.Wang, " TransferredPowerControlforICPTPick-upsUtilizingDynamical lySwitchedInductor ", Proceedingsofthe2012InternationalConferenceonFutureEnerg y, Environment, andMaterials, EnergyProcedia16,2012, pp.1440 – 1447.Convert in wireless power transmission technology resonance frequency from principle be seen as conversion resonant inductance or resonant capacitance realize.If consider that inductance possesses saturation characteristic, if do not adopted air core inductor, then the realization of power transformation sense scheme is by relative complex, and precision controlling requires higher.
Summary of the invention
The object of the invention is, a kind of frequency changer circuit technical scheme based on magnetic resonance coupling wireless power transmission is provided.
The technical scheme that the present invention realizes is, a kind of frequency changer circuit based on magnetic resonance coupling wireless power transmission realizes the transmission of radio energy by magnetic resonance coupling; Utilize the mode synchronous change former and deputy limit resonance frequency of synchronous change former and deputy limit resonant capacitance capacitance, carry out frequency translation.
A kind of frequency changer circuit based on magnetic resonance coupling wireless power transmission of the present invention, comprising: former limit resonant circuit and secondary resonant circuit, resonant circuit is resonant inductance (coil) and forms with resonant capacitance.
Described resonant capacitance comprises former limit resonant capacitance and secondary resonant capacitance.Described former limit resonant capacitance and secondary resonant capacitance form resonant capacitance group conversion module by the capacitor that one or more power electronics alternating-current switch controls; Described circuit, by completing control and the conversion of resonant capacitance group capacitance to the control on former limit and all power electronics alternating-current switchs of secondary, realizes former and deputy limit resonant capacitance capacitance and controls and conversion, and the final resonance frequency changing wireless power transmission.
Described resonant capacitance group conversion module is by power electronics alternating-current switch S
1, S
2..., S
m..., S
nwith electric capacity C
1, C
2..., C
m..., C
nform; Each power electronics alternating-current switch controls an electric capacity, power electronics alternating-current switch S
1, S
2..., S
m..., S
ncontrol corresponding electric capacity C respectively
1, C
2..., C
m..., C
n.As power electronics alternating-current switch S
1when opening, electric capacity C
1access resonant capacitance group; As power electronics alternating-current switch S
1during shutoff, electric capacity C
1exit resonant capacitance group, by power electronics alternating-current switch S
1to electric capacity C
1control.In like manner, by power electronics alternating-current switch S
2..., S
m..., S
nrespectively to electric capacity C
2..., C
m..., C
ncontrol.By to all power electronics alternating-current switch S
1, S
2..., S
m..., S
ncontrol complete control to resonant capacitance group capacitance and conversion.
Described power electronics alternating-current switch adopts two same model Metal-Oxide Semiconductor field effect transistor M OSFET differential concatenations to form, and the gate connected in parallel of two pipes forms the control end G of power electronics alternating-current switch, the source series of two pipes forms common port S, and the drain electrode of two pipes forms two foreign current terminal D of power electronics alternating-current switch
1with D
2; When described control end and described common port two ends apply positive drive voltage, power electronics alternating-current switch is open-minded, foreign current terminal D
1with D
2possess current capacity, when described control end and described common port two ends do not apply driving voltage or apply reverse drive voltages, power electronics alternating-current switch turns off, foreign current terminal D
1with D
2no longer include current flowing before.
Described electric capacity C
1, C
2..., C
m..., C
ncan be single independent capacitance, also can be the capacitance group of several electric capacity composition; If capacitance group, its formation can adopt identical or model and the electric capacity that varies in size to form; Electric capacity C simultaneously
1, C
2..., C
m..., C
nits formation identically also can select different model and different value according to demand flexibly.
Described MOSFET pipe can adopt N channel structure, also can adopt P channel structure.
In described resonant capacitance group conversion module, each power electronics alternating-current switch S
1, S
2..., S
m..., S
nforming specification can be identical, also can specification difference.
The frequency changer circuit of described wireless power transmission comprises 4 class basic structures: former limit inductance (primary coil) and former limit capacitances in series, secondary inductance (secondary coil) and secondary capacitances in series; Former limit inductance (primary coil) and former limit capacitances in series, secondary inductance (secondary coil) and secondary Capacitance parallel connection; Former limit inductance (primary coil) and former limit Capacitance parallel connection, secondary inductance (secondary coil) and secondary capacitances in series; Former limit inductance (primary coil) and former limit Capacitance parallel connection, secondary inductance (secondary coil) and secondary Capacitance parallel connection.
A kind of frequency changer circuit based on magnetic resonance coupling wireless power transmission of the present invention is applicable to different former secondary circuits, and former limit front-end circuit can be any proper circuit, and secondary back-end circuit can be any proper circuit.
The invention has the beneficial effects as follows, the present invention utilizes the mode synchronous change former and deputy limit resonance frequency of synchronous change former and deputy limit resonant capacitance, achieves the frequency conversion of wireless power transmission.Adopt variable-frequency solutions can increase flexibility and the adaptability of radio energy technology, possess great theory value and broad prospect of application, effectively promote the development of wireless power transmission technology.Circuit structure of the present invention is novel, reliable, practical.The all spectra of available wireless electric energy transmission application of the present invention, as all energy extensive uses of the occasions such as architectural electricity, green energy resource, household electrical appliance, charger; Good application prospect is all had in all kinds of free-standing wireless power transmission technical applications.
Accompanying drawing explanation
Fig. 1 is a kind of frequency changer circuit schematic diagram based on magnetic resonance coupling wireless power transmission of the present invention;
Wherein, L
pfor former limit resonant inductance (coil), L
sfor secondary resonant inductance (coil), C
pfor former limit resonant capacitance group, C
sfor secondary resonant capacitance group;
Accompanying drawing 2 is the MOSFET bidirectional switch circuit figure of a kind of frequency changer circuit based on magnetic resonance coupling wireless power transmission of the present invention;
Accompanying drawing 3 is the former and deputy limit resonant capacitance group power electronics alternating-current switch control circuit figure of a kind of frequency changer circuit based on magnetic resonance coupling wireless power transmission of the present invention;
Wherein, S
1, S
2... S
m..., S
nbe power electronics alternating-current switch, C
rfor resonant capacitance group, former limit resonant capacitance group and secondary resonant capacitance group circuit are all and C
rroughly the same.
Embodiment
The embodiment of the present invention further illustrates by reference to the accompanying drawings.
Accompanying drawing 1 is a kind of frequency changer circuit resonant capacitance control circuit schematic diagram based on magnetic resonance coupling wireless power transmission of the present invention.
Wireless power transmission module, carries out Energy Transfer by former and deputy sideline circle.Send coil L
pwith receiving coil L
stwo identical coils can be adopted also can to adopt different coil.Coil L
pwith electric capacity C
pform former limit resonant circuit; Coil L
swith electric capacity C
sform secondary resonant circuit.Former limit resonance frequency f
pwith the resonance frequency f of secondary resonant circuit
sidentical or close, resonance frequency is identical or close is that the prerequisite of magnetic resonance coupling wireless power transmission realizes based on wireless power transmission high-frequency drive Real-time frequency conversion then former and deputy sideline circle resonance frequency must be synchronous.
The resonance frequency on former and deputy limit determined by the inductance and electric capacity participating in resonance, then needs the size changing resonant inductance or resonant capacitance as needed frequency conversion.Adopt and become capacitive scheme, by the size and number changing shunt capacitance, capacitor's capacity is controlled.Former and deputy sideline circle adopts identical coil, and former and deputy limit electric capacity is beneficial to synchronous change with employing same model specification and makes resonance synchronous.
Accompanying drawing 2 is the MOSFET power electronics alternating current switching circuit of a kind of frequency changer circuit based on magnetic resonance coupling wireless power transmission of the present invention.
The power electronics alternating-current switch of circuit of the present invention adopts two mos field effect transistor MOSFET differential concatenations to form.As applying positive drive voltage U
gStime, upper pipe Q
1lower pipe Q
2all to open.If switch external electric current is from D
1flow to D
2time, upper pipe Q
1work in forward current state, lower pipe Q
2work in synchronous rectification operating mode; When electric current is from D
2flow to D
1time, upper pipe Q
1work in synchronous rectification operating mode, lower pipe Q
2work in forward current state.After applying driving voltage, no matter current direction, power electronics alternating-current switch is all by conducting.When removing driving voltage or applying reverse voltage, power electronics alternating-current switch turns off.
Closed by the path of body diode after two MOSFET differential concatenations, electric current can not cause runaway electric circuit from body diode circulation.
In the application, MOSFET pipe can adopt silicone tube or carborundum (SiC) pipe, under it meets the prerequisite of instructions for use, two MOSFET of same power electronics alternating-current switch manage model used can identical also can be different.In actual use, MOSFET pipe is except can adopting N raceway groove, and also can adopt P raceway groove, its operation principle and N-channel MOS FET tubing seemingly, are no longer set forth.
Accompanying drawing 3 is that the power electronics alternating-current switch of a kind of frequency changer circuit based on magnetic resonance coupling wireless power transmission of the present invention controls resonant capacitance circuit diagram.
Resonant capacitance takes the Capacitance parallel connection combined treatment mode of each different size, is controlled the size of resonant capacitance, thus carry out resonance frequency control by the break-make of control switch.C in Fig. 1
pwith C
sthe resonant capacitance group C of circuits built all as shown in Figure 3
rreplace, when former and deputy limit resonance frequency need be converted, by control switch S
1~ S
m, the size changing resonant capacitance changes its resonance frequency.
When giving G
1when applying drive singal, power electronics alternating-current switch Q
1conducting, electric capacity C
1connect, access control resonant capacitance; And by G
1when drive singal removes, power electronics alternating-current switch Q
1turn off, electric capacity C
1exit resonant capacitance.In like manner, can connect and turn off electric capacity C
2, C
3..., C
m..., C
netc. all electric capacity.Connect and with which electric capacity of shutoff and actual demand determined.Electric capacity C
2, C
3..., C
m..., C
ncan be identical, also according to the actual requirements, different size and model can be selected flexibly.
Each different power electronics alternating-current switch drive circuit adopts isolation drive scheme, and the personnel possessing related electric knowledge all can design, and no longer provide physical circuit herein.
The present invention adopts power electronics alternating-current switch to control to become capacitance technology, achieves the resonant vibration frequency conversion task under wireless power transmission; Circuit structure is novel, reliable, practical.The present invention can be used for all kinds of wireless power transmission technology application scenario, includes but not limited to wireless charging field, radio energy field of power transmission, architectural electricity and New Green Energy source domain etc. occasion can extensive use.
The circuit topology of the wireless power transmission that the present invention provides in the accompanying drawings is the series connection of former limit, secondary parallel arrangement, but be not limited only to this type of topology, the present invention includes the series connection of former limit, secondary tandem plan, former limit is in parallel, secondary tandem plan, and the circuit topology schemes such as the parallel connection of former limit, secondary parallel arrangement are applicable equally.Above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1. based on a frequency changer circuit for magnetic resonance coupling wireless power transmission, it is characterized in that, described circuit realizes the transmission of radio energy by magnetic resonance coupling; Described magnetic resonance coupling frequency conversion is the mode synchronous change former and deputy limit resonance frequency utilizing synchronous change former and deputy limit resonant capacitance capacitance, carries out frequency translation; Described former limit resonant capacitance and secondary resonant capacitance form resonant capacitance group conversion module by the capacitor that one or more power electronics alternating-current switch controls; Described circuit completes control and the conversion of resonant capacitance group capacitance by the control of all power electronics alternating-current switchs to former limit and secondary resonant capacitance group conversion module, realize former and deputy limit resonant capacitance capacitance to control and conversion, and the final resonance frequency changing wireless power transmission.
2. a kind of frequency changer circuit based on magnetic resonance coupling wireless power transmission according to claim 1, it is characterized in that, described resonant capacitance group conversion module is by power electronics alternating-current switch S
1, S
2..., S
m..., S
nwith electric capacity C
1, C
2..., C
m..., C
nform; Each power electronics alternating-current switch controls an electric capacity, power electronics alternating-current switch S
1, S
2..., S
m..., S
ncontrol corresponding electric capacity C respectively
1, C
2..., C
m..., C
n; As power electronics alternating-current switch S
1when opening, electric capacity C
1access resonant capacitance group; As power electronics alternating-current switch S
1during shutoff, electric capacity C
1exit resonant capacitance group, by power electronics alternating-current switch S
1to electric capacity C
1control; In like manner, by power electronics alternating-current switch S
2..., S
m..., S
nrespectively to electric capacity C
2..., C
m..., C
ncontrol; By to all power electronics alternating-current switch S
1, S
2..., S
m..., S
ncontrol, complete the control to resonant capacitance group capacitance and conversion.
3. a kind of frequency changer circuit based on magnetic resonance coupling wireless power transmission according to claim 1, it is characterized in that, described power electronics alternating-current switch adopts two same model Metal-Oxide Semiconductor field effect transistor M OSFET differential concatenations to form, and the gate connected in parallel of two pipes forms the control end G of power electronics alternating-current switch, the source series of two pipes forms common port S, and the drain electrode of two pipes forms two foreign current terminal D of power electronics alternating-current switch
1with D
2; When described control end and described common port two ends apply positive drive voltage, power electronics alternating-current switch is open-minded, foreign current terminal D
1with D
2possess current capacity, when described control end and described common port two ends do not apply driving voltage or apply reverse drive voltages, power electronics alternating-current switch turns off, foreign current terminal D
1with D
2no longer include current flowing before.
4. a kind of frequency changer circuit based on magnetic resonance coupling wireless power transmission according to claim 2, is characterized in that, described electric capacity C
1, C
2..., C
m..., C
ncan be single independent capacitance, also can be the capacitance group of several electric capacity composition; If capacitance group, its formation can adopt identical or model and the electric capacity that varies in size to form; Electric capacity C simultaneously
1, C
2..., C
m..., C
nits formation can be identical, also can select different model and different value.
5. a kind of frequency changer circuit based on magnetic resonance coupling wireless power transmission according to claim 3, it is characterized in that, described MOSFET pipe adopts N raceway groove, or adopts P raceway groove.
6. a kind of frequency changer circuit based on magnetic resonance coupling wireless power transmission according to claim 3, is characterized in that, in described resonant capacitance group conversion module, and each power electronics alternating-current switch S
1, S
2..., S
m..., S
nformation can specification identical, also can specification different.
7. a kind of frequency changer circuit based on magnetic resonance coupling wireless power transmission according to claim 1, it is characterized in that, the frequency changer circuit structure of described wireless power transmission comprises 4 classes: former limit inductance and former limit capacitances in series, secondary inductance and secondary capacitances in series; Former limit inductance and former limit capacitances in series, secondary inductance and secondary Capacitance parallel connection; Former limit inductance and former limit Capacitance parallel connection, secondary inductance and secondary capacitances in series; Former limit inductance and former limit Capacitance parallel connection, secondary inductance and secondary Capacitance parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510739095.3A CN105245035A (en) | 2015-11-04 | 2015-11-04 | Frequency changer circuit based on magnetic resonance coupling wireless power transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510739095.3A CN105245035A (en) | 2015-11-04 | 2015-11-04 | Frequency changer circuit based on magnetic resonance coupling wireless power transmission |
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| Publication Number | Publication Date |
|---|---|
| CN105245035A true CN105245035A (en) | 2016-01-13 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510739095.3A Pending CN105245035A (en) | 2015-11-04 | 2015-11-04 | Frequency changer circuit based on magnetic resonance coupling wireless power transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105245035A (en) |
Cited By (3)
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| CN106993345A (en) * | 2017-05-16 | 2017-07-28 | 洛阳科诺工业设备有限公司 | A kind of impedance, frequency Auto-matching formula resonance circuit |
| CN113659736A (en) * | 2021-10-20 | 2021-11-16 | 深圳英集芯科技股份有限公司 | Wireless charger and electronic equipment |
| WO2023050216A1 (en) * | 2021-09-29 | 2023-04-06 | 西门子股份公司 | Cllc dc-dc converter |
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|---|---|---|---|---|
| CN106993345A (en) * | 2017-05-16 | 2017-07-28 | 洛阳科诺工业设备有限公司 | A kind of impedance, frequency Auto-matching formula resonance circuit |
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| WO2023050216A1 (en) * | 2021-09-29 | 2023-04-06 | 西门子股份公司 | Cllc dc-dc converter |
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Application publication date: 20160113 |