CN106294994A - It is applied to the compensation capacitance adjustment method of symmetrical expression coupling radio energy transmission system - Google Patents

It is applied to the compensation capacitance adjustment method of symmetrical expression coupling radio energy transmission system Download PDF

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Publication number
CN106294994A
CN106294994A CN201610647367.1A CN201610647367A CN106294994A CN 106294994 A CN106294994 A CN 106294994A CN 201610647367 A CN201610647367 A CN 201610647367A CN 106294994 A CN106294994 A CN 106294994A
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coil
electric capacity
receiving
loading
driving
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CN201610647367.1A
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CN106294994B (en
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杨金明
谢兴琅
朱红飞
刘鹏航
曾君
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South China University of Technology SCUT
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South China University of Technology SCUT
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00Computer-aided design [CAD]
    • G06F30/20Design optimisation, verification or simulation
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06QDATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/06Electricity, gas or water supply
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/06Power analysis or power optimisation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70Smart grids as climate change mitigation technology in the energy generation sector
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

Abstract

The invention discloses a kind of compensation capacitance adjustment method being applied to symmetrical expression coupling radio energy transmission system, the method is in symmetrical coupling radio energy transmission system structure, the compensation capacitance of fixed transmission coil and receiving coil, the compensation electric capacity driving coil and loading coil uses on-off control electric capacity, and i.e. compensate the power optimization formula of electric capacity be compensated capacitance based on compensating the explicit optimum option of electric capacity, it is thus possible to quickly realize driving the power optimization of coil and loading coil to compensate choosing of electric capacity, improve the output of symmetrical expression coupling radio energy transmission system (MRC WPT).

Description

It is applied to the compensation capacitance adjustment method of symmetrical expression coupling radio energy transmission system
Technical field
The present invention relates to the technical field of wireless power transmission, refer in particular to one and be applied to symmetrical expression coupling radio energy The compensation capacitance adjustment method of transmission system.
Background technology
Inductively coupled power transfer (inductively coupled power transfer, ICPT) can realize electric energy Non-contact transmission, owing to by efficiency of transmission and Power Limitation, transmission range is less, MIT the magnetic resonance coupling radio proposed Can transmission (magnetically resonant coupling wireless power transfer, MRC-WPT) technology make Transmission range has had breakthrough, it is achieved that the electric energy transmission that distance is 2m, efficiency is 40%.Along with going deep into of research, WPT obtains one Fixed achievement, the vivo devices being applied in medical treatment the aspect such as powers, and electric automobile fills technology, special installation is powered.
MRC-WPT technology utilizes the distribution capacity of coil or additional electric capacity to realize resonance.In order to improve voltage gain and merit Rate transmittability, need to compensate the coil of MRC-WPT.Two kinds of methods common in Coil Compensation electric capacity is chosen Having: 1) four coils all operate in resonant condition;2) optimal compensation electric capacity is given by iterative method.But four coils are all operated in humorous The state of shaking can not make the output of MRC-WPT system reach maximum, and iterative method needs a large amount of calculating, and every subparameter becomes Dynamic meeting causes new one to take turns calculating.
Summary of the invention
It is an object of the invention to the shortcoming overcoming prior art with not enough, it is provided that it is wireless that one is applied to symmetrical expression coupling The compensation capacitance adjustment method of electric energy transmission system, it is possible to quickly realize driving the power optimization of coil and loading coil to compensate electricity That holds chooses, and improves the output of MRC-WPT.
For achieving the above object, technical scheme provided by the present invention is: be applied to symmetrical expression coupling wireless power transmission The compensation capacitance adjustment method of system, described symmetrical expression coupling radio energy transmission system is mainly by a symmetrical trigger mechanism With a receiving mechanism composition, described trigger mechanism includes driving coil and the first on-off control electric capacity of configuration, transmitting Coil and the first fixed compensation capacitor of configuration thereof, described receiving mechanism includes the second fixing benefit of receiving coil and configuration thereof The second switch repaying electric capacity, loading coil and configuration thereof controls electric capacity, and described driving coil is connected by full-bridge inverter to be had directly Stream regulated power supply, described loading coil connects load, and the direct current of voltage regulation of D.C. regulated power supply converts through full-bridge inverter For high frequency square wave, inject and drive coil, drive coil high frequency square wave to be converted into the sine wave with frequency, by close-coupled by energy Amount is sent to transmitting coil, transmitting coil and driving coil close-coupled, and sets up magnetic field, logical with receiving coil formation transmission Road, receiving coil forms resonance with transmitting coil, receives the energy transmitted from the resonance of magnetic field, loading coil and reception line Circle is by close-coupled therefrom interrogation energy;Described compensation capacitance adjustment method is the compensation of fixed transmission coil and receiving coil Capacitance, drives the compensation electric capacity of coil and loading coil to use on-off control electric capacity, and explicitly optimizes choosing based on compensating electric capacity Take and i.e. compensate the power optimization formula of electric capacity and be compensated capacitance such that it is able to quickly realize driving coil and loading coil Power optimization compensates choosing of electric capacity, improves the output of symmetrical expression coupling radio energy transmission system, and it includes following step Rapid:
1) wind coil, measure each coil inductance and internal resistance value;
2) assemble trigger mechanism and receiving mechanism, measure and drive coil/loading coil and transmitting coil/receiving coil Mutual inductance;
3) fixed transmission mechanism and receiving mechanism position, measures transmitting coil and the mutual inductance of receiving coil;
4) certain system running frequency, calculates the resonant capacitance value of transmitting coil and loading coil;
5) above parameter is substituted into the power optimization formula of compensation electric capacity, tries to achieve the compensation electricity driving coil and loading coil Holding, its expression formula is:
Wherein:
a 1 = ω 2 ( M r 2 R L + M s 2 R r ) a 2 = ω 2 ( M s 2 R r + M r 2 R d ) a 3 = ω 4 M s 4 + ω 2 R d ( M r 2 R L + M s 2 R r + M s 2 R L R r ) a 4 = - ω 2 M r 2
In formula: ω is that system runs angular frequency;C1、C4It is respectively and drives coil and the compensation capacitance of loading coil;L1、 L4It is respectively and drives coil and the inductance value of loading coil;MrMutual inductance for transmitting coil Yu receiving coil;MsFor driving line Circle/loading coil and the mutual inductance of transmitting coil/receiving coil;RLFor loading coil resistance value;RrFor transmitting coil/reception The internal resistance value of coil;RdFor driving coil resistance.
The present invention compared with prior art, has the advantage that and beneficial effect:
1, symmetrical trigger mechanism and receiving mechanism have distinguished two kinds of coupled relations in MRC-WPT system: close coupling and Loose coupling.And the apart from each other transmitting coil being in loose coupling state and receiving coil are taken to the side of resonance compensation Method, makes energy distance effectively transmit.For at a distance of the most nearby in close coupling state driving coil (loading coil) and Ray circle (receiving coil) takes Optimization Compensation, makes output maximum.
2, compensate the explicit optimum option of electric capacity and can draw driving coil and the value of loading coil rapidly and accurately, remove iteration from A large amount of calculating in method optimization, and output can be improved.
Accompanying drawing explanation
Fig. 1 is that symmetrical expression couples radio energy transmission system structural representation.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
As it is shown in figure 1, couple radio energy transmission system structural representation, this symmetrical expression coupling radio energy for symmetrical expression Transmission system is mainly made up of a symmetrical trigger mechanism and a receiving mechanism, and described trigger mechanism includes driving coil 6 and configuration the first on-off control electric capacity 2, transmitting coil 7 and configuration the first fixed compensation capacitor 3, described receiver Structure includes the second switch of receiving coil 8 and the second fixed compensation capacitor 4 of configuration, loading coil 9 and configuration thereof and controls Electric capacity 5, described driving coil 6 is connected by full-bridge inverter 1 D.C. regulated power supply 11, and the connection of described loading coil 9 has negative Carry 10.The direct current of voltage regulation of D.C. regulated power supply 11 is converted into high frequency square wave through full-bridge inverter 1, injects and drives coil 6, drives High frequency square wave is converted into the sine wave with frequency by moving winding 6, transfers the energy to transmitting coil 7 by close-coupled, launches line Circle 7 and driving coil 6 close-coupled, and set up magnetic field, form transmission channel, receiving coil 8 and transmitting coil with receiving coil 8 7 form resonance, receive the energy transmitted from the resonance of magnetic field, and loading coil 9 is with receiving coil 8 by close-coupled therefrom Interrogation energy.
Compensation capacitance adjustment method described in the present embodiment is the compensation capacitance of fixed transmission coil and receiving coil, drives The compensation electric capacity of moving winding and loading coil uses on-off control electric capacity, and i.e. compensates electricity based on compensating the explicit optimum option of electric capacity The power optimization formula held is compensated capacitance such that it is able to quickly realize driving the power optimization of coil and loading coil to mend Repaying choosing of electric capacity, improve the output of symmetrical expression coupling radio energy transmission system, it comprises the following steps:
1) wind coil, measure each coil inductance and internal resistance value;
2) assemble trigger mechanism and receiving mechanism, measure and drive coil/loading coil and transmitting coil/receiving coil Mutual inductance;
3) fixed transmission mechanism and receiving mechanism position, measures transmitting coil and the mutual inductance of receiving coil;
4) certain system running frequency, calculates the resonant capacitance value of transmitting coil and loading coil;
5) above parameter is substituted into the power optimization formula of compensation electric capacity, tries to achieve the compensation electricity driving coil and loading coil Holding, its expression formula is:
Wherein:
a 1 = ω 2 ( M r 2 R L + M s 2 R r ) a 2 = ω 2 ( M s 2 R r + M r 2 R d ) a 3 = ω 4 M s 4 + ω 2 R d ( M r 2 R L + M s 2 R r + M s 2 R L R r ) a 4 = - ω 2 M r 2
In formula: ω is that system runs angular frequency;C1、C4It is respectively and drives coil and the compensation capacitance of loading coil;L1、 L4It is respectively and drives coil and the inductance value of loading coil;MrMutual inductance for transmitting coil Yu receiving coil;MsFor driving line Circle/loading coil and the mutual inductance of transmitting coil/receiving coil;RLFor loading coil resistance value;RrFor transmitting coil/reception The internal resistance value of coil;RdFor driving coil resistance.
The impedance Q of transmitting coil is made by optimizing design transmitting coil and receiving coil2Impedance Q with receiving coil3Foot Enough big, with the high efficiency transmission requirement of distance in meeting.By the internal resistance of source and load effect, drive the impedance Q of coil1And load The impedance Q of coil4Less, but drive between coil and transmitting coil and between receiving coil and loading coil, close-coupled can make k12And k34Increase, make up Q with this1And Q4Relatively low adverse effect.
The change compensating electric capacity driving coil and loading coil can't make system efficiency when middle Distance Transmission decline. Meanwhile, drive the compensation electric capacity of coil and loading coil that MRC-WPT can be made to be issued to optimum output at given parameters by optimization Power.The impedance of each coil is substituted in the expression formula of power, ignore without ω but the R Han Coil resistancepi(i=1,2,3,4) Quadratic term, output Pout-simIt is expressed as:
P o u t - s i m = ω 6 M s 4 M r 2 R L V s 2 ( a 1 X 1 + a 2 X 4 ) 2 + ( a 3 + a 4 X 1 X 4 ) 2
Wherein:
In formula: X1、X4It is respectively the reactance driving coil with loading coil.
For obtaining the compensation electric capacity of power maximum point, constructed fuction:
F(X1,X4)=(a1X1+a2X4)2+(a3+a4X1X4)2
F(X1,X4) minima correspondence peak power, seek its minimum, order:Meet pole
The solution of value condition is:
The condition of the reasonable existence of this solution is:Logical Cross solution X1、X4The power optimization value of electric capacity can be drawn.
Embodiment described above is only the preferred embodiments of the invention, not limits the practical range of the present invention with this, therefore The change that all shapes according to the present invention, principle are made, all should contain within the scope of the present invention.

Claims (1)

1. it is applied to the compensation capacitance adjustment method of symmetrical expression coupling radio energy transmission system, described symmetrical expression coupling radio System of transmitting mainly is made up of a symmetrical trigger mechanism and a receiving mechanism, and described trigger mechanism includes driving line First fixed compensation capacitor of the first on-off control electric capacity, transmitting coil and the configuration thereof of circle and configuration thereof, described receiving mechanism The second switch of the second fixed compensation capacitor, loading coil and the configuration thereof that include receiving coil and configuration thereof controls electric capacity, Described driving coil is connected by full-bridge inverter D.C. regulated power supply, and described loading coil connects load, DC voltage-stabilizing The direct current of voltage regulation of power supply is converted into high frequency square wave through full-bridge inverter, injects and drives coil, drives coil by high frequency square wave It is converted into the sine wave with frequency, transfers the energy to transmitting coil, transmitting coil and the driving tight coupling of coil by close-coupled Closing, and set up magnetic field, form transmission channel with receiving coil, receiving coil forms resonance with transmitting coil, receives humorous from magnetic field The energy that center of percussion transmits, loading coil and receiving coil are by close-coupled therefrom interrogation energy;It is characterized in that: described Compensate the compensation capacitance that capacitance adjustment method is fixed transmission coil and receiving coil, drive coil and the compensation of loading coil Electric capacity uses on-off control electric capacity, and i.e. compensates the power optimization formula of electric capacity mended based on compensating the explicit optimum option of electric capacity Repay capacitance such that it is able to quickly realize driving the power optimization of coil and loading coil to compensate choosing of electric capacity, improve symmetry Formula couples the output of radio energy transmission system, and it comprises the following steps:
1) wind coil, measure each coil inductance and internal resistance value;
2) assemble trigger mechanism and receiving mechanism, measure the mutual inductance driving coil/loading coil with transmitting coil/receiving coil Coefficient;
3) fixed transmission mechanism and receiving mechanism position, measures transmitting coil and the mutual inductance of receiving coil;
4) certain system running frequency, calculates the resonant capacitance value of transmitting coil and loading coil;
5) above parameter is substituted into the power optimization formula of compensation electric capacity, tries to achieve driving coil and the compensation electric capacity of loading coil, Its expression formula is:
Wherein:
a 1 = ω 2 ( M r 2 R L + M s 2 R r ) a 2 = ω 2 ( M s 2 R r + M r 2 R d ) a 3 = ω 4 M s 4 + ω 2 R d ( M r 2 R L + M s 2 R r + M s 2 R L R r ) a 4 = - ω 2 M r 2
In formula: ω is that system runs angular frequency;C1、C4It is respectively and drives coil and the compensation capacitance of loading coil;L1、L4Respectively For driving coil and the inductance value of loading coil;MrMutual inductance for transmitting coil Yu receiving coil;MsFor driving coil/negative Carry the mutual inductance of coil and transmitting coil/receiving coil;RLFor loading coil resistance value;RrFor transmitting coil/receiving coil Internal resistance value;RdFor driving coil resistance.
CN201610647367.1A 2016-08-09 2016-08-09 Compensating electric capacity adjusting method applied to symmetrical coupling radio energy transmission system Active CN106294994B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102222967A (en) * 2011-06-17 2011-10-19 武汉中原电子集团有限公司 Self-adaptive wireless charging system
CN102969802A (en) * 2012-11-01 2013-03-13 重庆大学 Current type wireless power supply system load self-adapting control method
US20130300350A1 (en) * 2011-01-28 2013-11-14 Zhiyong Xiang Wireless charging device
CN103872798A (en) * 2014-03-27 2014-06-18 武汉大学 Magnetic resonance wireless energy transmission system and optimization method of positions of coils thereof
CN103928961A (en) * 2014-04-16 2014-07-16 国家电网公司 Electric vehicle wireless charging system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130300350A1 (en) * 2011-01-28 2013-11-14 Zhiyong Xiang Wireless charging device
CN102222967A (en) * 2011-06-17 2011-10-19 武汉中原电子集团有限公司 Self-adaptive wireless charging system
CN102969802A (en) * 2012-11-01 2013-03-13 重庆大学 Current type wireless power supply system load self-adapting control method
CN103872798A (en) * 2014-03-27 2014-06-18 武汉大学 Magnetic resonance wireless energy transmission system and optimization method of positions of coils thereof
CN103928961A (en) * 2014-04-16 2014-07-16 国家电网公司 Electric vehicle wireless charging system

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