CN108282028A - The tuning methods and system of resonance type wireless electric energy transmission based on current amplitude - Google Patents
The tuning methods and system of resonance type wireless electric energy transmission based on current amplitude Download PDFInfo
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- CN108282028A CN108282028A CN201711487074.2A CN201711487074A CN108282028A CN 108282028 A CN108282028 A CN 108282028A CN 201711487074 A CN201711487074 A CN 201711487074A CN 108282028 A CN108282028 A CN 108282028A
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- capacitance
- resonance
- energy transmission
- current amplitude
- resonance portion
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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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- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The tuning methods and system for the resonance type wireless electric energy transmission based on current amplitude that the present invention provides a kind of, including：The resonance portion of magnetic coupling resonant radio energy Transmission system transmitting terminal is located to resonator and carries out parallel control positioned at the resonance portion of magnetic coupling resonant radio energy Transmission system receiving terminal；Adjust the capacitance of capacitance in the resonance portion of transmitting terminal and receiving terminal so that transmitting terminal and receiving terminal reach resonant condition under the same resonant frequency.The present invention can avoid the derivation of complicated formulas, save time cost, and applicability is stronger, smaller by coil, capacitive parasitic inductance and capacitive effect, convenient to use.
Description
Technical field
The present invention relates to electroporation fields, and in particular, to a kind of resonance type wireless electric energy biography based on current amplitude
Defeated tuning methods and system.
Background technology
Wireless power transmission (wireless power transfer, WPT) refers to the one kind of electric energy from power supply to load
The not energy transmission mode by being electrically in direct contact.According to the difference of the mechanism of transmission, wireless power transmission is broadly divided into
Microwave, laser, inductively, magnetic coupling resonance, field coupling mode etc..In many wireless power transmission modes, magnetic coupling
It closes resonant mode energy transmission technology and relies on small, the more low advantage of directivity requirement due to long transmission distance, to transmission medium, be to work as
Main research hotspot in preceding wireless power transmission technical field of research.However, in magnetic coupling resonant radio energy transmission form
In, determine that the resonance point in transmitting coil circuit and receiving coil circuit is obtained mainly by theoretical calculation at present, it can by adjusting
Capacitance is adjusted to reach resonant condition.It unavoidably will produce the parasitic inductance and resistance, inductance of capacitance due to manufacture craft
Parasitic capacitance and resistance etc., especially higher in resonant frequency, above-mentioned factor can not be ignored, that is, cause theoretical calculation
Calculating process is complicated, and error is larger, cannot be satisfied practical application.And for different conducting wires, such as litz wire, paint
A variety of conducting wires such as envelope curve, the conclusion that theory deduction goes out do not have universality, it is higher to compute repeatedly time cost.Further, since electric
Road model non-ideal, different application scene have differences, and circuit is relatively complicated, need to carry out the complicated derivation of equation
It can draw a conclusion.
Invention content
For the defects in the prior art, the object of the present invention is to provide a kind of, and the resonance type wireless based on current amplitude is electric
The tuning methods and system that can be transmitted.
According to a kind of tuning methods of the resonance type wireless electric energy transmission based on current amplitude provided by the invention, including：
Step 1：The resonance portion of magnetic coupling resonant radio energy Transmission system transmitting terminal is located to resonator and is located at magnetic
The resonance portion of coupled resonance radio energy transmission system receiving terminal carries out parallel control；
Step 2：Adjust the capacitance of capacitance in the resonance portion of transmitting terminal and receiving terminal so that transmitting terminal and receiving terminal are same
Reach resonant condition under one resonant frequency.
Preferably, the step 2 specifically includes：Apply sinusoidal voltage in the resonance portion, continuously adjusts the electricity
Resonance occurs when current amplitude reaches maximum value for the electric current that the resonance portion is monitored while the capacitance of appearance, at this time capacitance
Capacitance be needed for the capacitance that adjusts.
Preferably, the resonance portion is the series resonant circuit for including resistance, inductance and capacitance, according to formulaB is current amplitude size, and A is sinusoidal voltage amplitude size, and R is resistance value, makes to detect by adjusting capacitance size
Current amplitude size reach the value of B.
According to a kind of tuning system of the resonance type wireless electric energy transmission based on current amplitude provided by the invention, including：
Resonator strip module：It is located at the resonance portion of magnetic coupling resonant radio energy Transmission system transmitting terminal to resonator
Parallel control is carried out with the resonance portion positioned at magnetic coupling resonant radio energy Transmission system receiving terminal；
Capacitance adjustment module：Adjust the capacitance of capacitance in the resonance portion of transmitting terminal and receiving terminal so that transmitting terminal and connect
Receiving end reaches resonant condition under the same resonant frequency.
Preferably, the capacitance adjustment module applies sinusoidal voltage in the resonance portion, the capacitance is being continuously adjusted
Capacitance while monitor the electric current of the resonance portion, resonance occurs when current amplitude reaches maximum value, at this time capacitance
Capacitance is the required capacitance adjusted.
Preferably, the resonance portion is the series resonant circuit for including resistance, inductance and capacitance, according to formulaB is current amplitude size, and A is sinusoidal voltage amplitude size, and R is resistance value, makes to detect by adjusting capacitance size
Current amplitude size reach the value of B.
Compared with prior art, the present invention has following advantageous effect：
1, the present invention can avoid the derivation of complicated formulas, save time cost；
2, compared with theory deduction, detect whether to reach resonance shape by the way that whether observation current amplitude reaches maximum value
State, applicability is stronger, is suitable for litz wire, a variety of conducting wires such as enameled wire, and theory deduction must all be weighed for each conducting wire
It is newly derived, adaptability is poor；
3, theory deduction has ignored the inductance parasitic capacitance generated due to factors such as techniques, resistance and capacitive parasitic electricity
Sense, the influence of resistance, calculated value error is larger, and the tuning methods based on current amplitude observation are by coil, capacitive parasitic electricity
Sense, capacitive effect are smaller；
4, the present invention is easy to use, fast.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is magnetic coupling resonant radio energy Transmission system entire block diagram；
Fig. 2 is actual capacitance equivalent circuit；
Fig. 3 is actual inductance equivalent circuit；
Fig. 4 is the ideal circuit model of series resonant circuit；
Fig. 5 is the actual circuit model of series resonant circuit；
Fig. 6 is that transmitting terminal resonance owes capacitance state simulation waveform；
Fig. 7 is that transmitting terminal resonance crosses capacitance state simulation waveform；
Fig. 8 is transmitting terminal resonant condition simulation waveform；
Fig. 9 is the different current amplitude schematic diagrames corresponding to different capacitances；
Wherein：
Vin：DC input voitage；
C1：Transmitting terminal tuning capacitance；
C4：Receiving terminal tuning capacitance；
C：Equivalent analysis capacitance；
L1：Transmitting terminal coil inductance；
L4：Receiving terminal coil inductance；
L2：Capacitive parasitic inductance；
L：Equivalent analysis inductance；
Rp1、Rs1：Capacitive parasitic resistance；
Rs2：Inductance parasitic resistance；
Cp1：Inductance parasitic capacitance；
Vi：Inverter input side voltage；
Vo：Inverter outlet side voltage；
Us：Equivalent RLC artificial circuits sinusoidal excitation；
Is：Equivalent RLC artificial circuits loop current；
α：Owe electric current leading voltage phase angle under capacitance state；
β：Cross current lagging voltage phase angle under capacitance state；
f0：Resonant frequency；
ω0：Resonance angular frequency；
Im：Take imaginary-part operator；
A：Voltage magnitude；
Bm：Current amplitude maximum value.
Specific implementation mode
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection domain.
A kind of tuning methods of resonance type wireless electric energy transmission based on current amplitude provided by the invention, including：
Step 1：The resonance portion of magnetic coupling resonant radio energy Transmission system transmitting terminal is located to resonator and is located at magnetic
The resonance portion of coupled resonance radio energy transmission system receiving terminal carries out parallel control；
Step 2：Adjust the capacitance of capacitance in the resonance portion of transmitting terminal and receiving terminal so that transmitting terminal and receiving terminal are same
Reach resonant condition under one resonant frequency.It specifically includes：
Apply sinusoidal voltage in the resonance portion, the resonance is monitored while continuously adjusting the capacitance of the capacitance
Resonance occurs when current amplitude reaches maximum value for partial electric current, and the capacitance of capacitance is the required capacitance adjusted at this time.
The tuning system for the resonance type wireless electric energy transmission based on current amplitude that the present invention also provides a kind of, including：
Resonator strip module：It is located at the resonance portion of magnetic coupling resonant radio energy Transmission system transmitting terminal to resonator
Parallel control is carried out with the resonance portion positioned at magnetic coupling resonant radio energy Transmission system receiving terminal；
Capacitance adjustment module：Adjust the capacitance of capacitance in the resonance portion of transmitting terminal and receiving terminal so that transmitting terminal and connect
Receiving end reaches resonant condition under the same resonant frequency.Capacitance adjustment module applies sinusoidal voltage in the resonance portion,
The electric current that the resonance portion is monitored while the capacitance for continuously adjusting the capacitance, occurs when current amplitude reaches maximum value
Resonance, the capacitance of capacitance is the required capacitance adjusted at this time.
Fig. 1 gives the overall structure figure of magnetic coupling resonant radio energy Transmission system, inputs as direct current, passes through inverter bridge
The square-wave signal changed by certain frequency is obtained later, and transmitting coil is equivalent to a big inductance, can filter out higher hamonic wave, warp
The tunable capacitor for overregulating transmitting terminal, makes transmitting terminal reach resonant condition, and receiving terminal is transmitted energy to by magnetic field, passes through tune
The tunable capacitor for saving receiving terminal, makes receiving terminal reach resonant condition, receives the electric energy that transmitting terminal transmits to greatest extent, supplies
Load uses.
Fig. 2, Fig. 3 are respectively the actual circuit model of capacitance and the actual circuit model of inductance, the actual circuit mould of capacitance
In type, parasitic inductance L2Include that (size has with capacitance internal structure and technique by wiring parasitic inductance and endophyte inductance
Close) composition, for electrolytic capacitor, endophyte inductance is much larger than wiring parasitic inductance；For ceramic disc capacitor, endophyte
Inductance is smaller.In the actual circuit model of inductance, parasitic capacitance CpStray capacitance mainly between coiling and circle is (for pF
Grade), it is related with wire winding.Due to magnetic coupling resonant radio energy transmission circuit work at high frequencies, parasitic inductance with
The effect of parasitic capacitance cannot be ignored, this brings prodigious difficulty to the method for theoretical calculation.
This patent proposes a kind of tuning methods for the resonance type wireless electric energy transmission observed based on current amplitude, i.e., by magnetic coupling
The resonator closed in resonant radio energy Transmission system is individually stripped out, including the resonance portion and receiving terminal of transmitting terminal
Resonance portion.Resonance portion mainly then includes a series resonant circuit of R, L, C, by adjusting transmitting terminal and receiving terminal
Tunable capacitor part so that transmitting terminal and receiving terminal reach resonant condition under the same resonant frequency, therefore complete electric energy
High efficiency of transmission.
Fig. 4 is the ideal circuit model of transmitting terminal or receiving terminal series resonant circuit, that is, includes equivalent resistance R0, coil electricity
Feel L0And tunable capacitor C0.It can be from figure it is found that equivalent resistance R0And coil inductance L0It can measure, resonant frequency fcBy demand
It is given, it, can be by according to the condition and feature of series resonance
Z(jωe)=R0 (1)
Acquire tunable capacitor C0Numerical value, obtain
I.e. by calculating, it can derive the size of tunable capacitor, adjust tunable capacitor, circuit is made to reach resonant condition.
And in practical application, inductance, capacitance are no longer ideal models.
Fig. 5 is the actual circuit model of transmitting terminal or receiving terminal series resonant circuit, i.e., includes parasitic inductance, electricity in capacitance
It hinders, also includes parasitic capacitance, resistance in inductance.It can be from figure it is found that series resonant circuit model at this time becomes answering extremely
It is miscellaneous, if wanting to carry out the derivation of equation according to the condition and feature of series resonance, find out tunable capacitor C0Numerical value be extremely to have any problem
, time cost is bigger, and parasitic inductance wherein included, capacitance are not easy to measure, in different application scenarios, conducting wire
Type is different, and corresponding parameter also has larger difference, therefore is difficult to find out tunable capacitor C by theoretical calculation0Numerical value,
And application condition is big.Therefore the method that this patent uses is, the characteristics of using when series resonance, as having when series resonance,
Im[Z(jωc) I=O (3)
Current amplitude will reach maximum value.Therefore in given resonant frequency fcUnder, it is subject to sinusoidal voltage in circuit port
Wherein, the π of A=38, ω=2 f, f=500kHz.
By continuously adjusting tunable capacitor C0While, while passing through corresponding instrument monitoring series resonant circuit electric current
Size, when current amplitude reaches maximum value in monitoring device, that is,
Resonance occurs for circuit, and the numerical value of tunable capacitor is just required value this moment.The method is not from the internal junction of circuit
Structure considers, and external behavior when reaching series resonance from it is starting point, whether reaches maximum amplitude by monitoring current, comes
Determine the numerical value of tunable capacitor.
Fig. 6, Fig. 7, Fig. 8 are the simulation waveform of actual circuit series resonance, respectively owe capacitance state, cross capacitance shape
State and resonant condition.It wherein owes capacitance state and indicates that capacitance is less than capacitance when resonance occurs at this time, crosses capacitance state
Indicate that capacitance is more than capacitance when resonance occurs at this time.
Fig. 9 is that tunable capacitor is in current amplitude size corresponding when different value.This set radio energy transmission system is adopted
Resonant frequency is 500kHz, thus due to technique etc. caused by parasitic inductance and parasitic capacitance can not ignore, cannot
Using inductance and the ideal model of capacitance, and its practical circuit model should be utilized, due to the resonant frequency of transmitting terminal and receiving terminal
Identical, structure and principle are similar, and only parameter is different, only carry out the emulation of the actual circuit model of transmitting terminal here, with
This illustrates that the correctness and practicability of this patent institute extracting method, receiving terminal can similarly obtain.By a series of tests, we obtain
It is about 4.9 Ω to emit resistance contained by end-coil, and equivalent inductance value is about 138 μ H, if simply by mathematical computations, by formula
C=734.9pF is acquired, is transferred to this numerical value by adjusting tunable capacitor, resonance does not occur for actual circuit, this is
Since the influence of the various aspects factors such as measurement and technique, and the product of same manufacturer production also has certain difference, and this is just
Affect the efficiency of radio energy transmission system.But this numerical value occurs to a rough numerical value, actual circuit is we provided
The numerical value of capacitance should be near herein when series resonance.Because it is in resistive that circuit when resonance, which occurs, therefore can be by formula
Wherein B is current amplitude size, and A is sinusoidal excitation amplitude size, and 4.9 be resistance value.It can be obtained by formula (7),
Current amplitude is maximum, B=7.75 when resonance.On this basis, when it is 697pF to adjust adjustable electric capacitance, B=1.625, electricity
Road is capacitive state, illustrates that capacitance values are less than normal；When it is 768pF to adjust adjustable electric capacitance, circuit is perceptual state, illustrates electricity
It is bigger than normal to hold numerical value.Therefore it can be seen that, capacitance values when reaching resonance should be 697pF between 768pF.By continuing to adjust,
We have obtained one group of curve as shown in figure 9, when adjusting tunable capacitor to C=733.9pF, and current amplitude is maximum, is
7.7551A, it is known that series resonance has occurred in circuit under this capacitance values.The tuning methods provided by this patent may compare
Capacitance size when resonance occurs for radio energy transmission system under different application scene is easily obtained, there is practicability.
It is measured by experiment, exports in square wave and contain higher hamonic wave, by the filter action of coil, it is humorous high order can be filtered out
Wave.The maximum distance of its wireless power transmission is 40cm, and maximal efficiency 67% demonstrates the available of institute's extracting method of the present invention
Property.
One skilled in the art will appreciate that in addition to realizing system provided by the invention in a manner of pure computer readable program code
It, completely can be by the way that method and step be carried out programming in logic come so that the present invention provides and its other than each device, module, unit
System and its each device, module, unit with logic gate, switch, application-specific integrated circuit, programmable logic controller (PLC) and embedding
Enter the form of the controller that declines etc. to realize identical function.So system provided by the invention and its every device, module, list
Member is considered a kind of hardware component, and also may be used for realizing the device of various functions, module, unit to include in it
To be considered as the structure in hardware component；It can also will be considered as realizing the device of various functions, module, unit either real
The software module of existing method can be the structure in hardware component again.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or change within the scope of the claims, this not shadow
Ring the substantive content of the present invention.In the absence of conflict, the feature in embodiments herein and embodiment can arbitrary phase
Mutually combination.
Claims (6)
1. a kind of tuning methods of the resonance type wireless electric energy transmission based on current amplitude, which is characterized in that including：
Step 1：The resonance portion of magnetic coupling resonant radio energy Transmission system transmitting terminal is located to resonator and is located at magnetic coupling
The resonance portion of resonant radio energy Transmission system receiving terminal carries out parallel control；
Step 2：Adjust the capacitance of capacitance in the resonance portion of transmitting terminal and receiving terminal so that transmitting terminal and receiving terminal are same
Reach resonant condition under resonant frequency.
2. the tuning methods of the resonance type wireless electric energy transmission according to claim 1 based on current amplitude, feature exist
In the step 2 specifically includes：Apply sinusoidal voltage in the resonance portion, continuously adjusts the same of the capacitance of the capacitance
When monitor the electric current of the resonance portion, resonance occurs when current amplitude reaches maximum value, at this time the capacitance of capacitance i.e. needed for
The capacitance adjusted.
3. the tuning methods of the resonance type wireless electric energy transmission according to claim 2 based on current amplitude, feature exist
In the resonance portion is the series resonant circuit for including resistance, inductance and capacitance, according to formula
B is current amplitude size, and A is sinusoidal voltage amplitude size, and R is resistance value, makes inspection by adjusting capacitance size
The current amplitude size measured reaches the value of B.
4. a kind of tuning system of the resonance type wireless electric energy transmission based on current amplitude, which is characterized in that including：
Resonator strip module：It is located at resonance portion and the position of magnetic coupling resonant radio energy Transmission system transmitting terminal to resonator
Parallel control is carried out in the resonance portion of magnetic coupling resonant radio energy Transmission system receiving terminal；
Capacitance adjustment module：Adjust the capacitance of capacitance in the resonance portion of transmitting terminal and receiving terminal so that transmitting terminal and receiving terminal
Reach resonant condition under the same resonant frequency.
5. the tuning system of the resonance type wireless electric energy transmission according to claim 4 based on current amplitude, feature exist
In the capacitance adjustment module applies sinusoidal voltage in the resonance portion, while continuously adjusting the capacitance of the capacitance
Resonance occurs when current amplitude reaches maximum value for the electric current for monitoring the resonance portion, and the capacitance of capacitance is i.e. required at this time adjusts
The capacitance saved.
6. the tuning system of the resonance type wireless electric energy transmission according to claim 5 based on current amplitude, feature exist
In the resonance portion is the series resonant circuit for including resistance, inductance and capacitance, according to formula
B is current amplitude size, and A is sinusoidal voltage amplitude size, and R is resistance value, makes inspection by adjusting capacitance size
The current amplitude size measured reaches the value of B.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108616170A (en) * | 2018-07-17 | 2018-10-02 | 宁波微鹅电子科技有限公司 | Electric energy transmitting circuit, circuit module and apply its wireless charging device |
| CN109391894A (en) * | 2018-10-17 | 2019-02-26 | 杭州弘声科技有限公司 | The bearing calibration of speaker impedance curve, apparatus and system |
| CN110350670A (en) * | 2019-05-29 | 2019-10-18 | 北京航空航天大学 | A kind of Universal wireless charging transmitting end device and control method |
| CN115079069A (en) * | 2022-07-25 | 2022-09-20 | 国仪量子(合肥)技术有限公司 | Frequency-variable modulation field system, control method thereof and EPR spectrometer |
| CN115097364A (en) * | 2022-07-25 | 2022-09-23 | 国仪量子(合肥)技术有限公司 | Frequency-variable modulation field system, control method thereof and EPR spectrometer |
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| US20090224608A1 (en) * | 2008-02-24 | 2009-09-10 | Nigel Power, Llc | Ferrite Antennas for Wireless Power Transfer |
| CN106602744A (en) * | 2017-01-13 | 2017-04-26 | 山西潞安环保能源开发股份有限公司王庄煤矿 | Miniwatt middle-distance magnetic coupling wireless power transmission apparatus and tuning method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20090224608A1 (en) * | 2008-02-24 | 2009-09-10 | Nigel Power, Llc | Ferrite Antennas for Wireless Power Transfer |
| CN106602744A (en) * | 2017-01-13 | 2017-04-26 | 山西潞安环保能源开发股份有限公司王庄煤矿 | Miniwatt middle-distance magnetic coupling wireless power transmission apparatus and tuning method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108616170A (en) * | 2018-07-17 | 2018-10-02 | 宁波微鹅电子科技有限公司 | Electric energy transmitting circuit, circuit module and apply its wireless charging device |
| CN109391894A (en) * | 2018-10-17 | 2019-02-26 | 杭州弘声科技有限公司 | The bearing calibration of speaker impedance curve, apparatus and system |
| CN110350670A (en) * | 2019-05-29 | 2019-10-18 | 北京航空航天大学 | A kind of Universal wireless charging transmitting end device and control method |
| CN115079069A (en) * | 2022-07-25 | 2022-09-20 | 国仪量子(合肥)技术有限公司 | Frequency-variable modulation field system, control method thereof and EPR spectrometer |
| CN115097364A (en) * | 2022-07-25 | 2022-09-23 | 国仪量子(合肥)技术有限公司 | Frequency-variable modulation field system, control method thereof and EPR spectrometer |
| CN115097364B (en) * | 2022-07-25 | 2022-11-18 | 国仪量子(合肥)技术有限公司 | Frequency-variable modulation field system, control method thereof and EPR spectrometer |
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Application publication date: 20180713 |