CN107508387B - The positive control method for coordinating in parallel of magnetic resonance electric energy transmission system - Google Patents
The positive control method for coordinating in parallel of magnetic resonance electric energy transmission system Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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Abstract
The invention discloses the positive control method for coordinating in parallel of magnetic resonance electric energy transmission system, when mainly solving radio energy transmission system short distance energy transmission, due to frequency splitting influence and the problem that causes system efficiency of transmission low, and be able to maintain efficiency of transmission of the system in remote energy transmission.The transmitting coil for devising a kind of double-deck coiling, i.e., have certain the number of turns Inside coil in the inner space of the unidirectional coiling transmitting coil of original single layer with same direction coiling, external coil made to be connected with Inside coil head, and tail tail is connected to form double positive parallel-connection structures.It is connected between Inside coil and external coil by a switch, so that free switching between double forward direction parallel resonance coils and single positive resonance coil.When short distance energy transmission, closure switch, double forward direction bridging coils inhibit frequency splitting as transmitting coil；When remote energy transmission, switch is disconnected, Dan Zhengxiang coil ensures efficiency of transmission as transmitting coil.
Description
Technical field
The present invention relates to the positive control method for coordinating in parallel of magnetic resonance electric energy transmission system.
Background technique
Magnet coupled resonant type wireless electric energy transmits (wireless power transfer via magnetic
Resonant coupling, WPT/MRC) technology is using 2 or multiple electromagnetic systems with identical resonance frequency, when it
When in resonant state, strong energy exchange occurs to each other, to realize the transmission of energy efficient rate by non-radiating near-field
A kind of technology.
According to the operating mode of the size of stiffness of coupling and system, the working region of radio energy transmission system can be divided into
Three kinds: close coupling, Critical Coupling, weak coupling region.
Research finds that the efficiency of transmission of system is in resonance frequency two when radio energy transmission system is in close coupling region
It is side-draw to obtain maximum value, that is, there is frequency splitting phenomenon；With the increase of distance, frequency splitting phenomenon fades away, when reaching
When Critical Coupling, the efficiency of transmission of system obtains maximum value at resonance frequency；With further increasing for transmission range, coupling
Coefficient reduces, and is in weak coupling region, the efficiency of transmission of system can sharply decline, but the efficiency of transmission of system is still in resonance frequency
Place reaches maximum, when being that frequency splitting is only present in short range transmission.
Currently, in order to inhibit frequency splitting, it can be using the methods of impedance matching, frequency-tracking, change loop construction.Resistance
Anti- matching technique be by transmitting terminal introduce coil carry out magnetic induction couple feed, by mechanically change the coupling coil with
Regulating system impedance matching is carried out in relative position between resonance coil.The technical operation is complicated, constant application.Technology of frequency tracking is
The a series of complex such as additional high current detector, difference amplifier, phase compensator, locking phase coil in WPT/MRC system
Circuit realize the tracing control to launching circuit resonance frequency, and then inhibit frequency splitting.But these additional circuits
System can be made to become complicated, can also consume additional energy.Further, it is also possible to inhibit frequency by way of the structure for changing coil
Rate division.For example reverse winding is introduced on resonance coil, too strong coupling is offset, can be very good to inhibit frequency splitting, but
It is that the technology is also reduced in the stiffness of coupling compared with distant location, reduces efficiency of the system in remote transmission.Therefore it needs
A kind of relatively good method is wanted to inhibit frequency splitting, while the efficiency that safeguards system is transmitted at a distance.
Summary of the invention
While the present invention is to realize in systems complicated circuit outside not plus, consumption excess energy, Neng Gouyou
Effect inhibits the frequency splitting that occurs in WPT/MRC, and can efficiency of transmission of safeguards system when remote, to provide one
The efficiently positive wireless power supply system design method in parallel of kind.
The positive control method for coordinating in parallel of magnetic resonance electric energy transmission system, it is realized by following steps；
Step 1: WPT/MRC system transmitting terminal is double positive bridging coils, i.e., double positive bridging coils are as emission lines
Circle；Receiving end is unidirectional coil, i.e., unidirectional coil is as receiving coil；Double forward direction bridging coils are identical by two direction of windings,
The different coil of radius " head is connected, and tail tail is connected " composes in parallel；The small coil of the radius coil inside big embedded in radius, it is interior
It is connected between portion's coil and external coil by a switch；Receiving coil is unidirectional coil, and direction of winding and two forward directions are simultaneously
On line circle is consistent；All coils are circular spiral coil；The double positive bridging coils of transmitting terminal and receiving end unidirectional coil is same
Axis is placed, and sets the radius of receiving end unidirectional coil as rR, the number of turns nR, setting transmitting terminal group positive bridging coil in pairs
Two coil radius are respectively rT 1And rT 2, wherein rT 1> rT 2；
Step 2: self-induction of loop formula are as follows:
In formula, μ0For space permeability (4 π × 10-7H/m), r is coil radius, and n is coil turn, and a is wire radius.
Mutual inductance formula between two single turn circular coils are as follows:
In formula, r1, r2It is the radius of two single turn circular coils, distance of the d between two single turn circular coils, K (k) and E (k) respectively
It is the first kind and elliptic integral of the second kind respectively.
The self-induction for finding out transmitting terminal two positive coils is respectively as follows:
In formula, rT 1And rT 2It is the radius of two positive coils, n respectivelyT 1And nT 2The number of turns of respectively two positive coils, a
For the radius of conducting wire.
Mutual inductance between transmitting terminal two positive coils and receiving end unidirectional coil is respectively as follows:
The mutual inductance between the double positive bridging coils of transmitting terminal and receiving end unidirectional coil is found out according to Circuit theory are as follows:
In formula, nT 1And nT 2It is the number of turns of transmitting terminal two positive coils, n respectivelyRIt is receiving end unidirectional coil the number of turns, rT 1
And rT 2It is the radius of transmitting terminal two positive coils, r respectivelyRIt is then receiving end unidirectional coil radius, D is two forward directions of transmitting terminal
The distance between coil and receiving end unidirectional coil central point；LT 1And LT 2It is the self-induction of transmitting terminal two positive coils respectively；M12
It is the mutual inductance between transmitting terminal two positive coils；M1(D) and M2It (D) is transmitting terminal two positive coils and receiving coil respectively
Between mutual inductance.
Step 3: obtaining formula by seeking differential of the M (D) about D:
According to the structure of double positive bridging coils and unidirectional coil, after the radius for determining transmitting terminal two positive coils,
The turn ratio of two positive coils can be found out.
Step 4: the number of turns of two positive coils is adjusted, according to formula:
Determine that mutual inductance is with the flat of distance change curve between the double positive bridging coils of transmitting terminal and receiving end unidirectional coil
Degree, v is smaller, indicates that mutual inductance is more flat with distance change curve；After comprehensively considering, show that two positive coils optimize the number of turns
Respectively nT 1And nT 2。
In formula, D0For the initial distance between the double positive bridging coils of transmitting terminal and receiving end unidirectional coil, D1For two coils
Between mutual inductance to be maximized be distance between two coils.
Step 5: finding out WPT/MRC system transmission coefficient of double positive bridging coils as transmitting coil respectively:
WPT/MRC system transmission coefficient with single positive coil as transmitting coil:
Wherein ω is angular frequency, M (D) be double positive bridging coils as transmitting coil when, the mutual inductance between dispatch coil；M′
(D) when for single positive coil as transmitting coil, mutual inductance between dispatch coil, RSAnd RLRespectively source impedance and load impedance.
Step 6: enabling:
S21=S21′
According to the relationship between dispatch coil between mutual inductance M (D)/M ' (D) and distance D, find out two formulas it is equal when, dispatch coil
Between distance Dm。
Step 7: when transmission range is less than DmWhen, the biography of WPT/MRC system of double forward direction bridging coils as transmitting coil
Defeated efficiency is higher than WPT/MRC system efficiency of transmission of the single positive coil as transmitting coil；When transmission range is greater than DmWhen, it is double
Positive bridging coil is lower than single positive coil as transmitting coil as the efficiency of transmission of the WPT/MRC system of transmitting coil
WPT/MRC system efficiency of transmission.
Step 8: when transmission range is less than DmWhen, use double positive bridging coils as the emission lines of WPT/MRC system
Circle, for inhibiting frequency splitting, realizes the high-efficiency transfer of system；When transmission range is greater than DmWhen, the lesser forward direction of radius
Coil carries out open circuit, and transmitting coil of the biggish positive coil of actionradius as WPT/MRC system keeps system high efficiency rate to pass
It is defeated.
Step 9: dispatch coil is tuned at working frequency used respectively using two tunable capacitors, magnetic resonance electricity is completed
It can the positive control method for coordinating in parallel of Transmission system.
The radius r of receiving end unidirectional coilRWith the number of turns nREstablished standards according to practical charge target determine；Composition transmitting
The radius r of two positive coils of the double positive bridging coils in endT 1And rT 2Established standards according to signal source determine.
Form two positive coil turn n of the double forward and reverse bridging coils of transmitting terminalT 1And nT 2Setting method be according to hair
The mutual inductance penetrated between the double positive bridging coils in end and receiving end unidirectional coil is determined with the planarization of transmission range change curve.
The positive control method for coordinating in parallel of magnetic resonance electric energy transmission system, it includes transmitting coil (by two positive coils
Double positive bridging coils of composition), receiving coil (unidirectional coil), tunable capacitor C1With tunable capacitor C2；The coil is spiral shell
Revolve circular coil.
The signal output end of signal generator and the signal input part of power amplifier connect；The power amplifier is just
To output terminal and tunable capacitor C1One end connection；The tunable capacitor C1Other end one end with two positive coils respectively
Connection；Described two positive coils " head is connected, and tail tail is connected "；The other end of the biggish positive coil of the radius is put with power
The negative sense output terminal connection of big device；The other end of the lesser positive coil of the radius is connect with one end of switch g；It is described to open
The negative sense output terminal of the other end and power amplifier that close g connects；
The double positive bridging coil of the transmitting terminal and receiving end unidirectional coil confronting coaxial are placed, and two hub of a spools point it
Between distance be D, D is positive number, and positive input of one end of the receiving end unidirectional coil and load connects；The reception
Hold the other end and tunable capacitor C of unidirectional coil2One end connection, the tunable capacitor C2The other end and load negative end
Son connection.
It is that the present invention obtains the utility model has the advantages that it is double forward direction bridging coils in short distance energy transmission as WPT/MRC system
Transmitting coil can effectively inhibit the generation of WPT/MRC frequency splitting phenomenon；Single forward direction coil is made in remote energy transmission
It can guarantee that system high efficiency rate is transmitted for the transmitting coil of WPT/MRC system.
Detailed description of the invention
Fig. 1 is WPT/MRC system structure diagram；
Fig. 2 is the equivalent circuit diagram of WPT/MRC system；
Fig. 3 is the double positive bridging coils of transmitting terminal and receiving end unidirectional coil structural schematic diagram；
Fig. 4 be single positive coil as transmitting coil radio energy transmission system efficiency of transmission with frequency, dispatch coil
Between distance change emulation schematic diagram；
Fig. 5 be double positive bridging coils as transmitting coil radio energy transmission system efficiency of transmission with frequency, receive and dispatch
Emulation schematic diagram of the coil-span from variation；
Fig. 6 be the positive bridging coil of Dan Zhengxiang/bis- as transmitting coil radio energy transmission system efficiency of transmission humorous
With the emulation schematic diagram of dispatch coil distance change at vibration frequency；
Double forward direction bridging coils are as transmitting coil when Fig. 7 is short distance, and single forward direction coil is as emission lines when remote
The radio energy transmission system efficiency of transmission of circle with distance change between dispatch coil emulation schematic diagram；
Specific embodiment
Below in conjunction with attached drawing, efficient positive wireless power supply system design method in parallel is illustrated.
Fig. 1 is WPT/MRC system structure diagram.
As shown in Figure 1, WPT/MRC system includes signalling generator, power amplifier, transmitting coil (by two forward directions
Double positive bridging coils of coil composition), receiving coil (unidirectional coil), tunable capacitor C1With tunable capacitor C2And load.
Fig. 2 is the equivalent circuit diagram of WPT/MRC system.
As shown in Fig. 2, transmitting terminal two positive coil inductances are respectively Lt 1And Lt 2, receiving end unidirectional coil inductance is Lr；
Mutual inductance between two positive coils is M12；Mutual inductance between two positive coils and receiving end unidirectional coil is respectively M1(D)
And M2(D)；After equivalent, the inductance of the double positive bridging coils of transmitting terminal is Lt, transmitting terminal and the mutual inductance received between end-coil are
M(D)。
Fig. 3 is the double positive bridging coils of transmitting terminal and receiving end unidirectional coil structural schematic diagram.
As shown in figure 3, transmitting terminal is double positive bridging coils, receiving end is unidirectional coil.Double forward direction bridging coils are by two
A forward direction coil composition, the direction of winding of two positive coils is identical, " head is connected, and tail tail is connected " group positive parallel wire in pairs
Circle, is connected between Inside coil and external coil by a switch；The direction of winding of receiving end unidirectional coil and two forward directions
The direction of winding of coil is identical, and the coil is circular spiral coil.
Self-induction of loop formula are as follows:
In formula, μ0For space permeability (4 π × 10-7H/m), r is coil radius, and n is coil turn, and a is wire radius.
Mutual inductance formula between two single turn circular coils are as follows:
In formula, r1, r2It is the radius of two single turn circular coils, distance of the d between two single turn circular coils, K (k) and E (k) respectively
It is the first kind and elliptic integral of the second kind respectively.
The self-induction for finding out transmitting terminal two positive coils is respectively as follows:
In formula, rT 1And rT 2It is the radius of two positive coils, n respectivelyT 1And nT 2The number of turns of respectively two positive coils, a
For the radius of conducting wire.
Mutual inductance between transmitting terminal two positive coils and receiving end unidirectional coil is respectively as follows:
According to fig. 2 and Circuit theory finds out the mutual inductance between the double positive bridging coils of transmitting terminal and receiving end unidirectional coil
Are as follows:
In formula, nT 1And nT 2It is the number of turns of transmitting terminal two positive coils, n respectivelyRIt is receiving end unidirectional coil the number of turns, rT 1
And rT 2It is the radius of transmitting terminal two positive coils, r respectivelyRIt is then receiving end unidirectional coil radius, D is two forward directions of transmitting terminal
The distance between coil and receiving end unidirectional coil central point；LT 1And LT 2It is the self-induction of transmitting terminal two positive coils respectively；M12
It is the mutual inductance between transmitting terminal two positive coils；M1(D) and M2It (D) is transmitting terminal two positive coils and receiving coil respectively
Between mutual inductance.
Formula (6) are obtained by the differential to formula (5):
Wherein:
According to the structure of double positive bridging coils and unidirectional coil, after the radius for determining transmitting terminal two positive coils,
The turn ratio of two positive coils can be found out.
The number of turns of two positive coils is adjusted, according to formula:
Determine that mutual inductance is with the flat of distance change curve between the double positive bridging coils of transmitting terminal and receiving end unidirectional coil
Degree, v is smaller, indicates that mutual inductance is more flat with distance change curve；After comprehensively considering, show that two positive coils optimize the number of turns
Respectively nT 1And nT 2。
In formula, D0For the initial distance between the double positive bridging coils of transmitting terminal and receiving end unidirectional coil, D1For two coils
Between mutual inductance to be maximized be distance between two coils.
WPT/MRC system transmission coefficient of double positive bridging coils as transmitting coil is found out respectively:
WPT/MRC system transmission coefficient with single positive coil as transmitting coil:
Wherein ω is angular frequency, M (D) be double positive bridging coils as transmitting coil when, the mutual inductance between dispatch coil；M′
(D) when for single positive coil as transmitting coil, mutual inductance between dispatch coil, RSAnd RLRespectively source impedance and load impedance.
It enables:
S21=S21′ (10)
According to the relationship between dispatch coil between mutual inductance M (D)/M ' (D) and distance D, find out two formulas it is equal when, dispatch coil
Between distance Dm。
When transmission range is less than DmWhen, the efficiency of transmission of WPT/MRC system of double forward direction bridging coils as transmitting coil
WPT/MRC system efficiency of transmission higher than single positive coil as transmitting coil, at this point, use pair forward direction bridging coils as
The transmitting coil of WPT/MRC system realizes the high-efficiency transfer of system for inhibiting frequency splitting；When transmission range is greater than Dm
When, the efficiency of transmission of WPT/MRC system of double forward direction bridging coils as transmitting coil is lower than single positive coil as transmitting
The WPT/MRC system efficiency of transmission of coil, at this point, disconnecting the one of positive coil of transmitting terminal, actionradius is biggish just
Transmitting coil to coil as WPT/MRC system keeps the transmission of system high efficiency rate.
Transmission coefficient S can be used according to the transmission characteristic of magnet coupled resonant type wireless energy transmission system21It indicates, transmits
Efficiency is indicated with η.
η=| S21|2× 100% (12)
When system works in coil resonance frequency, transmission coefficient S21It can simplify as (10) formula:
The transmission coefficient S it can be seen from formula (10)21It is the function about mutual inductance and frequency, so in fixed work frequency
Preferable efficiency curves are obtained under rate, can be realized by changing the parameter of dispatch coil.Therefore, for the excellent of coil
Change design to be very important.
Fig. 4 be single positive coil as transmitting coil radio energy transmission system efficiency of transmission with frequency, receive and dispatch line
The emulation schematic diagram of distance change between circle.
As shown in figure 4, single positive coil is used alone as transmitting coil, WPT/MRC system is in short range transmission
There is apparent frequency splitting phenomenon, system resonance frequency go out efficiency of transmission is substantially reduced.
Fig. 5 be double positive bridging coils as transmitting coil radio energy transmission system efficiency of transmission with frequency, receive and dispatch
Emulation schematic diagram of the coil-span from variation.
As shown in figure 5, being made using double positive bridging coils by two positive coil " head is connected, and tail tail is connected " compositions
For transmitting coil, the WPT/MRC system efficiency of transmission always highest at resonance frequency, there is no frequency splitting phenomenons.
By comparison diagram 4 and Fig. 5 it can be concluded that radio energy transmission system of double forward direction bridging coils as transmitting coil
It can be very good the generation for inhibiting frequency splitting present.
Fig. 6 be the positive bridging coil of Dan Zhengxiang/bis- as transmitting coil radio energy transmission system efficiency of transmission humorous
With the emulation schematic diagram of dispatch coil distance change at vibration frequency.
As shown in fig. 6, single positive coil is used alone as transmitting coil, WPT/MRC system is in short range transmission
Radio energy transmission system efficiency of transmission of the efficiency of transmission of system significantly lower than double positive bridging coils as transmitting coil；Far
Apart from when efficiency of transmission be then higher than radio energy transmission system efficiency of transmission of double positive bridging coils as transmitting coil.
Double forward direction bridging coils are as transmitting coil when Fig. 7 is short distance, and single forward direction coil is as emission lines when remote
The radio energy transmission system efficiency of transmission of circle with distance change between dispatch coil emulation schematic diagram.
As shown in fig. 7, do not switched over simultaneously using single positive and double positive two kinds of transmitting coils in parallel in transmission range,
It can fully ensure that the high-efficiency transfer of WPT/MRC system.
Efficiently positive wireless power supply system design method in parallel above is summarized, following design procedure can be summarized as:
1, receiving end unidirectional coil size is determined according to charge target, transmitting terminal two positive coils is determined according to power supply
Size；
2, the mutual inductance between the double positive bridging coils of transmitting terminal and receiving end unidirectional coil is found out, that is, (5) are found out, by right
(5) differential obtains (6), finds out the turn ratio between two positive coils, is adjusted to the number of turns of two positive coils, root
Suitable the number of turns is chosen with the planarization of distance change curve according to mutual inductance between double positive bridging coils and unidirectional coil；According to
(10) double positive coils and single positive coil are found out respectively as the switching point of transmitting coil；
3, tunable capacitor is then utilized, dispatch coil is tuned at working frequency used
Invention effect: by theoretical calculation it is found that when short distance, WPT/MRC system use double positive bridging coils as
Transmitting coil can effectively inhibit the generation of frequency splitting phenomenon, and system can be made expeditiously to carry out energy in short distance
Amount transmission；When remote, system efficiency of transmission with higher can be guaranteed by switching single positive coil as transmitting coil.
Claims (4)
1. the positive control method for coordinating in parallel of magnetic resonance electric energy transmission system, it is characterized in that: it is realized by following steps:
Step 1: WPT/MRC system transmitting terminal is double positive bridging coils, i.e., double positive bridging coils are as transmitting coil；It connects
Receiving end is unidirectional coil, i.e., unidirectional coil is as receiving coil；Double forward direction bridging coils are identical by two direction of windings, and radius is not
Same coil head is connected, and tail tail, which is connected, to be composed in parallel；The small coil of radius embedded in the big coil inside of radius, Inside coil and
It is connected between external coil by a switch；Receiving coil is unidirectional coil, and direction of winding is consistent with double positive bridging coils；
All coils are circular spiral coil；By the double positive bridging coils of transmitting terminal and receiving end unidirectional coil coaxial placement, and set
The radius for determining receiving end unidirectional coil is rR, the number of turns nR, two coil radius of setting transmitting terminal group positive bridging coil in pairs
Respectively rT 1And rT 2, wherein rT 1> rT 2；
Step 2: self-induction of loop formula are as follows:
In formula, μ0For space permeability (4 π × 10-7H/m), r is coil radius, and n is coil turn, and a is wire radius；
Mutual inductance formula between two single turn circular coils are as follows:
In formula, r1, r2It is the radius of two single turn circular coils respectively, distance of the d between two single turn circular coils, K (k) and E (k) are respectively
It is the first kind and elliptic integral of the second kind；
The mutual inductance between the double positive bridging coils of transmitting terminal and receiving end unidirectional coil is found out according to Circuit theory:
In formula, nT 1And nT 2It is the number of turns of transmitting terminal two positive coils, n respectivelyRIt is receiving end unidirectional coil the number of turns, rT 1And rT 2
It is the radius of the positive coil of transmitting terminal two respectively, wherein rT 1> rT 2, rRIt is then receiving end unidirectional coil radius, D is transmitting terminal
Two positive the distance between coils and receiving end unidirectional coil central point；LT 1And LT 2It is transmitting terminal two positive coils respectively
Self-induction；M12It is the mutual inductance between transmitting terminal two positive coils；M1(D) and M2It (D) is transmitting terminal two positive coils respectively
Mutual inductance between receiving coil；
Step 3: obtaining formula by seeking differential of the M (D) about D:
It, can be with after the radius for determining transmitting terminal two positive coils according to the structure of double positive bridging coils and unidirectional coil
Find out the turn ratio of two positive coils；
Step 4: the number of turns of two positive coils is adjusted, according to formula:
Determine mutual inductance between the double positive bridging coil of transmitting terminal and receiving end unidirectional coil with the planarization of distance change curve,
V is smaller, indicates that mutual inductance is more flat with distance change curve；After comprehensively considering, show that two positive coils optimize the number of turns and are respectively
nT 1And nT 2；
In formula, D0For the initial distance between the double positive bridging coils of transmitting terminal and receiving end unidirectional coil, D1Between two coils mutually
Distance when sense is maximized between two coils；
Step 5: finding out WPT/MRC system transmission coefficient of double positive bridging coils as transmitting coil respectively:
WPT/MRC system transmission coefficient with single positive coil as transmitting coil:
Wherein ω is angular frequency, M (D) be double positive bridging coils as transmitting coil when, the mutual inductance between dispatch coil；M′(D)
When for single positive coil as transmitting coil, mutual inductance between dispatch coil, RSAnd RLRespectively source impedance and load impedance；
Step 6: enabling:
S21=S21′
According to the relationship between dispatch coil between mutual inductance M (D)/M ' (D) and distance D, find out two formulas it is equal when, between dispatch coil
Distance Dm；
Step 7: when transmission range is less than DmWhen, the transmission effect of WPT/MRC system of double forward direction bridging coils as transmitting coil
Rate is higher than WPT/MRC system efficiency of transmission of the single positive coil as transmitting coil；When transmission range is greater than DmWhen, double forward directions
Bridging coil is lower than WPT/ of the single positive coil as transmitting coil as the efficiency of transmission of the WPT/MRC system of transmitting coil
MRC system efficiency of transmission；
Step 8: when transmission range is less than DmWhen, use double positive bridging coils as the transmitting coil of WPT/MRC system, is used to
Inhibit frequency splitting, realizes the high-efficiency transfer of system；When transmission range is greater than DmWhen, the lesser positive coil of radius is carried out
Open circuit, transmitting coil of the biggish positive coil of actionradius as WPT/MRC system, keeps the transmission of system high efficiency rate；
Step 9: dispatch coil is tuned at working frequency used respectively using two tunable capacitors, completes magnetic resonance electric energy and pass
The positive control method for coordinating in parallel of defeated system.
2. the positive control method for coordinating in parallel of magnetic resonance electric energy transmission system according to claim 1, it is characterised in that connect
The radius r of receiving end unidirectional coilRWith the number of turns nREstablished standards according to practical charge target determine；Form the double forward directions of transmitting terminal simultaneously
The positive coil radius r of the two of on line circleT 1And rT 2Established standards according to signal source determine.
3. the positive control method for coordinating in parallel of magnetic resonance electric energy transmission system according to claim 2, it is characterised in that group
At two positive coil turn n of the double positive bridging coils of transmitting terminalT 1And nT 2Setting method be double positive in parallel according to transmitting terminal
Mutual inductance between coil and receiving end unidirectional coil is determined with the planarization of transmission range change curve.
4. the positive control method for coordinating in parallel of magnetic resonance electric energy transmission system according to claim 1, it is characterized in that device
Including transmitting coil, receiving coil, tunable capacitor C1With tunable capacitor C2；Coil described above is spiral circular coil；
The signal output end of signal generator and the signal input part of power amplifier connect；The forward direction of the power amplifier is defeated
Terminal and tunable capacitor C out1One end connection；The tunable capacitor C1The other end connect respectively with one end of two positive coils；
Described two positive coil heads are connected, and tail tail is connected；The other end of the biggish positive coil of the radius and power amplifier
The connection of negative sense output terminal；The other end of the lesser positive coil of the radius is connect with one end of switch g；The switch g's
The connection of the negative sense output terminal of the other end and power amplifier；
The double positive bridging coils of the transmitting terminal and receiving end unidirectional coil confronting coaxial are placed, and between two hub of a spools point
Distance is D, and D is positive number, and one end of the receiving end unidirectional coil and positive input of load connect；The receiving end is single
To the other end and tunable capacitor C of coil2One end connection, the tunable capacitor C2The other end and load negative sense terminal connect
It connects.
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| CN201710662199.8A CN107508387B (en) | 2017-08-04 | 2017-08-04 | The positive control method for coordinating in parallel of magnetic resonance electric energy transmission system |
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| CN107508387B true CN107508387B (en) | 2019-07-02 |
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| CN201710662199.8A Expired - Fee Related CN107508387B (en) | 2017-08-04 | 2017-08-04 | The positive control method for coordinating in parallel of magnetic resonance electric energy transmission system |
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| CN104135088A (en) * | 2014-08-08 | 2014-11-05 | 哈尔滨工业大学 | Non-identical transmitting and receiving coil pair applicable to wireless power transmission and capable of restraining frequency splitting and manufacturing method of non-identical transmitting and receiving coil pair |
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Patent Citations (1)
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| CN104135088A (en) * | 2014-08-08 | 2014-11-05 | 哈尔滨工业大学 | Non-identical transmitting and receiving coil pair applicable to wireless power transmission and capable of restraining frequency splitting and manufacturing method of non-identical transmitting and receiving coil pair |
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| Contactless Energy Transfer Systems Using Antiparallel Resonant Loops;Wang-Sang Lee等;《IEEE Transactions on Industrial Electronics》;20130131;第60卷(第1期);第350-359页 |
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