CN104539061B - A kind of electric energy transmitting terminal, wireless electric energy transmission device and wireless power transmission method - Google Patents
A kind of electric energy transmitting terminal, wireless electric energy transmission device and wireless power transmission method Download PDFInfo
- Publication number
- CN104539061B CN104539061B CN201510011896.8A CN201510011896A CN104539061B CN 104539061 B CN104539061 B CN 104539061B CN 201510011896 A CN201510011896 A CN 201510011896A CN 104539061 B CN104539061 B CN 104539061B
- Authority
- CN
- China
- Prior art keywords
- electric energy
- frequency
- capacitance
- inductance
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title abstract description 29
- 230000008859 change Effects 0.000 abstract description 21
- 230000008878 coupling Effects 0.000 abstract description 11
- 238000010168 coupling process Methods 0.000 abstract description 11
- 238000005859 coupling reaction Methods 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000008713 feedback mechanism Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 14
- 230000005611 electricity Effects 0.000 description 9
- 230000004907 flux Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- H02J5/005—
Landscapes
- Near-Field Transmission Systems (AREA)
Abstract
The invention discloses a kind of electric energy transmitting terminal, wireless electric energy transmission device and wireless power transmission methods, it adjusts the current signal of primary coil by current modulating circuit, so that the electric current for flowing through primary coil is the AC signal of constant frequency constant amplitude, can guarantee in this way it is no matter secondary loaded while whether good or secondary with the coupling condition of primary side change in the case of, the energy that primary side is transmitted to secondary side will not change, it is ensured that energy transmission efficiency reaches maximization.Compared with the existing technology, the present invention is without complicated feedback mechanism, and can be better than the design of secondary circuit, and system structure used in the present invention is simple, can apply to more complex environment, and efficient.
Description
Technical field
The present invention relates to power electronics fields, more specifically to a kind of electric energy transmitting terminal, wireless power transmission
Device and wireless power transmission method.
Background technology
Wireless power transmission technology is widely used in electronics field due to its convenient and practical feature, currently, real
The mode of existing wireless power transmission mainly has magnetic inductive and magnetic resonance type two ways, and magnetic inductive is due to by transmission range
It is very limited to limit its application scenario, magnetic resonance type wireless power transmission can realize remote, powerful electric energy transmission, can
Be widely used in electric terminal, electric vehicle, it is underwater, inferior electrical equipment charging and power supply.
Magnetic resonance type wireless electric energy transmission device includes mainly emitting portion and receiving portion, and the two passes through electromagentic resonance original
Reason realizes the maximization of energy transmission.It is the circuit block diagram of magnetic resonance type wireless electric energy transmission device, emitting portion as shown in Figure 1
Include the resonance structure of primary side transmitting coil Ls and resonant capacitance Cs compositions, receiving portion include secondary side receiving coil Ld and
The resonance mechanism of resonant capacitance Cd compositions.In order to ensure that wireless power can be transmitted effectively, the resonance knot on former secondary side is usually required that
The resonance point of structure is consistent or very close, and is denoted as the working frequency of system.
Magnetic resonance radio energy transmission system is in primary coil and higher secondary coil degree of coupling, it may appear that frequency point
Phenomenon is pitched, i.e. the optimum efficiency point or maximum power transfer point of system can deviate the resonant frequency of system.In order to solve frequency point
Phenomenon is pitched, there are two types of solutions in the prior art：First, take frequency control, the former secondary coil couple variations the case where
Under, by changing the working frequency of system come the optimum efficiency or maximum power point of tracking system；Second is that the impedance of setting system
Regulating networks allow system to be still operated in resonant frequency point by changing systematic parameter.For the control program of frequency conversion,
In order to be compatible with international Electromagnetic Radiation Standards, in the case of being typically limited to for low frequency (usually within 150kHz) work；
When for high-frequency work, usually require that system operating frequency is located at ISM band (6.78MHz), and ISM band narrow range, no
Allow regulating system working frequency.
For the control program of impedance matching, one is need multiple feedback control loops in circuit system to adjust matching
The voltage bias of voltage controlled capacitor in circuit adjusts the resonant parameter of system to change the capacitance of voltage controlled capacitor, so that
Fixed frequency work is possibly realized, and the capacitance of voltage controlled capacitor is adjusted by real-time reponse system, and control system is extremely complex, and
The voltage controlled capacitor of high pressure involves great expense.Another impedance matching scheme on former secondary side as shown in Fig. 2, by respectively increasing a line
Circle, an input coil, output winding (Lg in such as Fig. 2 or a LLIt is shown), by manually adjusting input coil and primary side
The coupled relation and output winding of coil and the coupled relation of secondary coil change the impedance matching network of system, and hand
Dynamic adjusting then clearly not applys to former secondary side relative position and there is the case where variation and load change.
Invention content
It is passed in view of this, the present invention proposes a kind of new electric energy transmitting terminal, wireless electric energy transmission device and radio energy
Transmission method adjusts the current signal of primary coil by current modulating circuit so that the electric current by primary coil is constant
The AC signal of frequency-invariant amplitude can guarantee no matter pair is born while whether good or secondary with the coupling condition of primary side in this way
In the case that load changes, it can guarantee that the efficiency of transmission of energy reaches maximization.
In a first aspect, a kind of electric energy transmitting terminal according to the present invention, to transmit energy to the electric energy receiving terminal being isolated from it
Amount, the electric energy transmitting terminal include：
Voltage changer receives electric energy to export the high-frequency alternating current with predeterminated frequency；
Current modulating circuit receives the high-frequency alternating current, to obtain adjusting current signal；
Electric energy emitting portion, including primary side transmitting coil, the primary side transmitting coil is for receiving the adjusting electric current letter
Number, to transmit energy to the electric energy receiving terminal；
Wherein, the predeterminated frequency is consistent with the electric energy transmitting terminal and the system operating frequency of electric energy receiving terminal, described
Adjusting current signal is the AC signal with constant frequency constant amplitude.
Further, the current modulating circuit is resonance circuit, and the resonant frequency of the resonance circuit is preset with described
Frequency is consistent.
Preferably, the current modulating circuit includes the resonance circuit being made of the first inductance and the first capacitance,
The first end of first inductance connects the positive output end of the voltage changer, and the second end is connected to the primary side hair
The first end of ray circle；
The first end of first capacitance is connect with the second end of first inductance, the second termination voltage changer
Negative output terminal；
Wherein, the resonant frequency of first inductance and the first capacitance is consistent with the predeterminated frequency, also, described first
The signal of the points of common connection of inductance and the first capacitance is as the adjusting current signal.
Preferably, the current modulating circuit includes the resonance circuit of the first inductance and the first capacitance composition,
The first end of first capacitance connects the positive output end of the voltage changer, and the second end is connected to the primary side hair
The first end of ray circle；
The first end of first inductance is connect with the second end of first capacitance, the second termination voltage changer
Negative output terminal；
Wherein, the resonant frequency of first inductance and the first capacitance is consistent with the predeterminated frequency, also, described first
The signal of the points of common connection of inductance and the first capacitance is as the adjusting current signal.
Further, further include the second inductance, the first end of second inductance connects the second end of first inductance,
Second end connects the first end of the primary side transmitting coil,
Wherein, the inductance value of second inductance is identical as the inductance value of the first inductance.
Further, further include the second capacitance, the first end of second capacitance connects the first end of first inductance,
Second end connects the negative output terminal of the voltage changer,
Wherein, the capacitance of second capacitance is identical as the capacitance of the first capacitance.
Further, further include third capacitance, the first end of the third capacitance connects the second end of first capacitance,
The first end of the second termination primary side transmitting coil,
Wherein, the capacitance of the third capacitance is identical as the capacitance of the first capacitance.
Further, further include third inductance, the first end of the third inductance connects the first end of first capacitance,
Second end connects the negative output terminal of the voltage changer,
Wherein, the inductance value of the third inductance is identical as the inductance value of the first inductance.
Second aspect, a kind of wireless electric energy transmission device according to the present invention, including；
Voltage changer receives electric energy to export the high-frequency alternating current with predeterminated frequency；
Current modulating circuit receives the high-frequency alternating current, to obtain adjusting current signal；
Electric energy emitting portion, including primary side transmitting coil, the primary side transmitting coil receive the adjusting current signal；
Electric energy receiving portion, including secondary side receiving coil, the pair side receiving coil is for receiving from electric energy emitting portion
The energy of transmission；
Wherein, the predeterminated frequency is consistent with the system operating frequency of the wireless electric energy transmission device, the adjusting electricity
Stream signal is the AC signal with constant frequency constant amplitude.
Further, the current modulating circuit is resonance circuit, and the resonant frequency of the resonance circuit is preset with described
Frequency is consistent.
Preferably, the current modulating circuit includes the resonance circuit being made of the first inductance and the first capacitance,
The first end of first inductance connects the positive output end of the voltage changer, and the second end is connected to the primary side hair
The first end of ray circle；
The first end of first capacitance is connect with the second end of first inductance, the second termination voltage changer
Negative output terminal；
Wherein, the resonant frequency of first inductance and the first capacitance is consistent with the predeterminated frequency also, described first
The signal of the points of common connection of inductance and the first capacitance is as the adjusting current signal.
Preferably, the current modulating circuit includes the resonance circuit being made of the first inductance and the first capacitance,
The first end of first capacitance connects the positive output end of the voltage changer, and the second end is connected to the primary side hair
The first end of ray circle；
The first end of first inductance is connect with the second end of first capacitance, the second termination voltage changer
Negative output terminal；
Wherein, the resonant frequency of first inductance and the first capacitance is consistent with the predeterminated frequency also, described first
The signal of the points of common connection of inductance and the first capacitance is as the adjusting current signal.
The third aspect, a kind of wireless power transmission method according to the present invention, by mutually isolated electric energy transmitting terminal and
Electric energy receiving terminal transmits energy, including：
Electric energy is received to export the high-frequency alternating current with predeterminated frequency, the predeterminated frequency and the electric energy transmitting terminal and
The system operating frequency of electric energy receiving terminal is consistent；
The high-frequency alternating current is received, by carrying out current-modulation to the high-frequency alternating current, there is constant frequency to obtain
The adjusting current signal of rate constant amplitude；
Primary side transmitting coil in electric energy transmitting terminal receives the adjusting current signal, and accordingly into electric energy receiving terminal
Secondary side receiving coil transmits energy.
Further, include to the specific steps of high-frequency alternating current progress current-modulation：
The high-frequency alternating current is modulated using the current modulating circuit being made of inductance and capacitance, wherein described
The resonant frequency of inductance and capacitance is consistent with the predeterminated frequency.
By above-mentioned electric energy transmitting terminal, wireless electric energy transmission device and wireless power transmission method, current-modulation is utilized
Circuit so that the electric current of primary coil is the AC signal of constant frequency constant amplitude, wireless power transmission system of the invention
System has the advantages that：
1) alternating magnetic field that constant frequency constant amplitude is generated in the surrounding space of primary coil, ensures that primary side is transmitted to
The electric energy on secondary side not because of the change in location of such as former secondary coil of extraneous variable (i.e. former secondary coil stiffness of coupling change) or
The change of load and change.
2) by generating the alternating magnetic field of constant frequency constant amplitude, be greatly conducive to secondary side in radio transmitting device and connect
It designs receiving end part.
3) due to generating constant space magnetic field in electric energy transmitting terminal, single transmitting coil may be implemented and correspond to multiple receptions
Adapter ring does not interfere with each other mutually between receiving coil, can realize the independent control of multiple-channel output.
4) the invention enables systems can be operated in fixed frequency, and the complication system of frequency-tracking is omitted.Primary side is sent out
The capacitance of voltage controlled capacitor need not be changed using complicated feedback mechanism by penetrating pastern point, and system structure is simplified.The present invention
Used system structure is simple, but the application environment that energy is more complex, can cope with the variation of former secondary coil coupling, load
Variation etc..
Description of the drawings
Fig. 1 show the circuit block diagram of magnetic resonance type wireless electric energy transmission device；
Fig. 2 show a kind of realization side of the impedance matching of magnetic resonance type wireless electric energy transmission device in the prior art
Formula；
Fig. 3 show the circuit block diagram of the first embodiment of wireless electric energy transmission device according to the present invention；
Fig. 4 show the circuit block diagram of second of realization method of electric energy transmitting terminal according to the present invention；
Fig. 5 show the circuit block diagram of the third realization method of electric energy transmitting terminal according to the present invention；
Fig. 6 show the circuit block diagram of the 4th kind of realization method of electric energy transmitting terminal according to the present invention；
Fig. 7 show the circuit block diagram of the 5th kind of realization method of electric energy transmitting terminal according to the present invention；
Fig. 8 show the circuit block diagram of the 6th kind of realization method of electric energy transmitting terminal according to the present invention；
Fig. 9 show the flow chart of the embodiment of wireless power transmission method according to the present invention.
Specific implementation mode
Several preferred embodiments of the present invention are described in detail below in conjunction with attached drawing, but the present invention is not restricted to
These embodiments.The present invention covers any replacement, modification, equivalent method and side made in the spirit and scope of the present invention
Case.In order to make the public have thorough understanding to the present invention, it is described in detail in following present invention preferred embodiment specific thin
Section, and description without these details can also understand the present invention completely for a person skilled in the art.
In addition, it should be understood by one skilled in the art that provided herein attached drawing be provided to explanation purpose, and
What attached drawing was not necessarily drawn to scale.
It will also be appreciated that in the following description, " circuit " refer to passed through by least one element or sub-circuit it is electrical
The galvanic circle that connection or electromagnetism connect and compose.It " is connected when claiming element or another element of circuit " being connected to " or element/circuit
" between two nodes when, it can be directly coupled or connected another element or may exist intermediary element, element it
Between connection can be physically, in logic or its combination.On the contrary, when claiming element " being directly coupled to " or " directly connecting
Be connected to " another element when, it is meant that the two be not present intermediary element.
In the description of the present invention, it is to be understood that, term " first ", " second " etc. are used for description purposes only, without
It can be interpreted as indicating or implying relative importance.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " multiple "
It is two or more.
The circuit block diagram of the first embodiment of wireless electric energy transmission device according to the present invention is shown with reference to figure 3；Such as Fig. 3
Shown, the wireless electric energy transmission device includes mutually isolated electric energy transmitting terminal and electric energy receiving terminal, in the present embodiment, institute
It includes voltage changer 1, current modulating circuit 2 and primary side transmitting coil Ls and resonant capacitance Cs composition electricity to state electric energy transmitting terminal
It can emitting portion 3；The electric energy receiving terminal includes secondary side receiving coil LdWith resonant capacitance CdThe electric energy receiving portion 4 of composition
With rectification circuit 5.Here, primary side resonant capacitance Cs and pair side resonant capacitance CdIt might not be needed, when to circuit parameter
It is of less demanding or in the case that circuit parasitic capacitance is larger, primary side resonant capacitance Cs and pair side resonant capacitance CdIt can not need.
External electric energy is transmitted by the electric energy transmitting terminal of the primary side of wireless electric energy transmission device to the electric energy receiving terminal on secondary side, rectified electricity
Rectification treatment and supplied in road loads.
Wherein, the voltage changer 1 is specially DC-AC voltage changers, and DC-AC voltage changers can be existing skill
In art or improved a variety of realization methods, such as the bridge type topology that Multi- Switch pipe forms, half-bridge, full-bridge topology etc., or list
The topological mechanism of switching tube composition, such as Class E amplifiers, Class Φ amplifiers etc., the DC-AC voltage changers receive
To export the high-frequency alternating current Vin with predeterminated frequency, the predeterminated frequency is electric energy with the wireless electric energy transmission device
Working frequency of uniting ω0Unanimously, i.e., the described predeterminated frequency is ω0, it should be clear that, the system of the wireless electric energy transmission device
Working frequency is preset according to circuit structure and efficiency requirements, for example, according to Alliance for Wireless
The standard of Power (A4WP), to meet EMI standards, it is desirable that system operating frequency 6.78MHz, and according to wireless charging alliance
QI standards, it is 110-205kHz generally to require system operating frequency, and user can be difficult according to the control for wanting summing circuit of standard
The working frequency size of easy self-defined system.
In the present embodiment, the current modulating circuit 2 receives the high-frequency alternating current Vin, and modulated processing is had
The AC signal for having constant frequency-invariant amplitude is denoted as and adjusts current signal Ip.Here, the current modulating circuit is humorous
Shake circuit, and the resonant frequency of the resonance circuit is consistent with the predeterminated frequency, that is to say the resonant frequency of the resonance circuit
It is consistent with the system operating frequency of wireless electric energy transmission device.In the present embodiment, the current modulating circuit 2 includes the first electricity
The first end of sense L1 and the first capacitance C1, the first inductance L1 connects the positive output end of the voltage changer 1, the second termination
To the first end of the primary side transmitting coil Ls；The first end of the first capacitance C1 and the second end of the first inductance L1 connect
It connects, second terminates the negative output terminal of the voltage changer 1, wherein the resonance of the first inductance L1 and the first capacitance C1 frequency
Rate and the predeterminated frequency ω0Unanimously, that is, haveWherein, L is the inductance value of the first inductance, and C is the first capacitance
Capacitance, the signal of the points of common connection of the first inductance L1 and the first capacitance C1 is as the adjusting current signal Ip.
It is specifically described the acquisition process for adjusting current signal according to above-mentioned current modulating circuit：Above-mentioned primary side is sent out
The equiva lent impedance Zd of ray circle Ls, resonant capacitance Cs and secondary coil is denoted as magnetic resonance network impedance Zs, then Zs is：
Wherein, Ls is the inductance value of primary side transmitting coil, and Cs is the capacitance of primary side resonant capacitance.
According to the introduction of above-mentioned first inductance and the first capacitance, the impedance for defining the first inductance L1 is：jω0L=jX, then
The impedance of first capacitance C1 is：- jX can obtain primary side according to the circuit relationships of the first inductance, the first capacitance and magnetic resonance network
Total input impedance ZinFor：
If the amplitude of the high-frequency alternating current is Vin, then the adjusting electricity of current modulating circuit output can be obtained according to formula (2)
Flowing signal Ip is：
From formula (3) as can be seen that when the resonant frequency of the first inductance and the first capacitance and the predeterminated frequency ω0One
When cause, the amplitude for adjusting current signal Ip is common by impedances of the first inductance L1 under system operating frequency and input voltage
It determines, after the impedance of the first inductance L1 and input voltage determination, then the adjusting current signal Ip is the constant width of constant frequency
The AC signal of value, the constant frequency are and the predeterminated frequency ω0Unanimously.As can be known from Fig. 3, the adjusting electric current
Signal Ip is the current signal of the primary side transmitting coil, and works as alternation of the primary side transmitting coil by constant frequency constant amplitude
When electric current, it will the alternating magnetic field of constant frequency constant amplitude is generated in the surrounding space of primary coil, in this way, the electricity on secondary side
Energy receiving terminal can receive stable electric flux, not because of the variation of such as former secondary coil coupling of extraneous factor or the variation of load
And change, it is ensured that the maximization of energy transmission efficiency.In addition, can also be seen that from formula (2) in the present embodiment, primary side
Total input impedance ZinAwareness character is shown as, the Sofe Switch for being advantageously implemented switching tube in DC-AC voltage changers in this way opens
It is dynamic.
In addition, according to above-mentioned calculating process it is recognised that in the present invention, due to making the electric current of primary side transmitting coil be
The alternating current of constant frequency constant amplitude, therefore the resonance point of Ls and Cs is not necessarily to be equal to system in magnetic resonance network
Working frequency ω0, such Cs can be reduced to the capacitance of large capacity.However in the resonator system of the prior art, generally
It is required that the resonance point of the Ls and Cs of magnetic resonance network exactly equal to or be in close proximity to system operating frequency, to ensure having for energy
Effect transmission.This structure containing current modulating circuit is for radio energy transmission system, as long as presetting current-modulation
The resonant frequency of the L and C of network are consistent with system operating frequency, then there is no need to do corresponding change according to different couplings
Change, reduces the control accuracy requirement for systematic parameter, overall control difficulty and control cost will all reduce.
It should be readily apparent to one skilled in the art that the resonant frequency in the current modulating circuit and the system operating frequency
When consistent, the constant return of electric current is best, therefore efficiency of transmission highest.But can also it be deduced according to the present invention, in current-modulation electricity
Resonant frequency in road is not exactly equal to working frequency (there are inductance or capacitance parameter errors), under constant current effect can slightly have
Drop, but have no effect on the high efficiency of wireless charging.Therefore through the invention as can be seen that the wireless power transmission system of the present invention
System is insensitive to the error of parameter, is very beneficial for producing in batches.
The first realization method of the electric energy transmitting terminal in wireless electric energy transmission device is described in a upper embodiment, it is excellent
Selection of land, in another embodiment, the current modulating circuit 2 further include the resonance being made of the first inductance L1 and the first capacitance C1
Circuit show the circuit block diagram of second of realization method of electric energy transmitting terminal according to the present invention with reference to figure 4, in the present embodiment
In, the other parts of the electric energy transmitting terminal are identical as a upper embodiment, therefore omit in Fig. 4, likewise, same section
Details are not described herein with function for circuit description.In the present embodiment, the impedance of the magnetic resonance network is denoted as Zs.
Specifically, in the present embodiment, the first end of the first capacitance C1 connects the positive output of the voltage changer
End, the second end is connected to the first end of the primary side transmitting coil；The first end of the first inductance L1 and first capacitance
Second end connects, the negative output terminal of the second termination voltage changer；Wherein, the first inductance L1 and the first capacitance C1
Resonant frequency and the predeterminated frequency ω0Unanimously, the signal of the points of common connection of the first inductance L1 and the first capacitance C1 is made
For the adjusting current signal Ip.
Can be deduced according to the calculating process of above-described embodiment, in the present embodiment, the electric energy transmitting terminal primary side it is total defeated
Enter impedance ZinFor：
Can obtain the adjusting current signal Ip that current modulating circuit exports according to formula (4) is：
Find out from formula (5), the alternation electricity that the primary side transmitting coil in the present embodiment passes through constant frequency constant amplitude
It flows, therefore generates the alternating magnetic field of constant frequency constant amplitude in the surrounding space of primary coil, in this way, the electric energy on secondary side connects
Receiving end can receive stable electric flux, not because of the variation of such as former secondary coil coupling of extraneous factor, the variation of load and become
Change, it is ensured that the maximization of energy transmission efficiency.
The circuit block diagram of the third realization method of electric energy transmitting terminal according to the present invention is shown with reference to figure 5, in this reality
It applies in example, voltage changer, current modulating circuit and magnetic resonance network and the embodiment phase in Fig. 3 of the electric energy transmitting terminal
Together, it therefore omits in Figure 5, likewise, details are not described herein with function for the circuit description of same section, circuit numbers are hereinafter
Directly quote.In the present embodiment, the impedance of the magnetic resonance network is denoted as Zs.
The difference is that in the present embodiment, the electric energy transmitting terminal further comprises the second inductance L2, described second
The first end of inductance L2 connects the second end of the first inductance L1, and second end connects the first end of the primary side transmitting coil,
Wherein, the inductance value of the second inductance L2 is identical as the inductance value of the first inductance L1, then the resistance of the second inductance L2
Resist for jX.
In the present embodiment, it can be obtained according to the circuit relationships of the first inductance, the first capacitance, the second inductance and magnetic resonance network
Total input impedance Z of primary sideinFor：
The adjusting current signal Ip of current modulating circuit output can be then obtained according to the circuit structure relationship of formula (6) and Fig. 5
For：
Find out from formula (7), the primary side transmitting coil in the present embodiment is similarly by constant frequency constant amplitude
Alternating current, therefore the alternating magnetic field of constant frequency constant amplitude is generated in the surrounding space of primary coil, in this way, secondary side
Electric energy receiving terminal can receive stable electric flux, not because extraneous factor is such as the variation or load that former secondary coil couples
Change and change, it is ensured that the maximization of energy transmission efficiency.
In addition, in the present embodiment, from formula (6) as can be seen that in the feelings that the impedance Z s of magnetic resonance network is pure resistance
Under condition, the total input impedance Z of primary side of the electric energy transmitting terminalinAlso it is pure resistance form, system circulation can be reduced in this way, reduces
Loss, to further increase the working efficiency of whole system.
The circuit block diagram of the 4th kind of realization method of electric energy transmitting terminal according to the present invention is shown with reference to figure 6, in this reality
It applies in example, voltage changer, current modulating circuit and magnetic resonance network and the embodiment phase in Fig. 3 of the electric energy transmitting terminal
Together, it therefore omits in figure 6, likewise, details are not described herein with function for the circuit description of same section, circuit numbers are hereinafter
Directly quote.In the present embodiment, the impedance of the magnetic resonance network is denoted as Zs.
The difference is that in the present embodiment, the electric energy transmitting terminal further comprises the second capacitance C2, described second
The first end of capacitance C2 connects the first end of the first inductance L1, and second end connects the negative output terminal of the voltage changer,
Wherein, the capacitance of the second capacitance C2 is identical as the capacitance of the first capacitance C1, then the resistance of the second capacitance C2
Resist for-jX.
It in the present embodiment, can according to the circuit relationships of the first inductance, the first capacitance, the second capacitance sense and magnetic resonance network
Obtain total input impedance Z of primary sideinFor：
The adjusting current signal Ip of current modulating circuit output can be then obtained according to the circuit structure relationship of formula (8) and Fig. 6
For：
Find out from formula (9), the primary side transmitting coil in the present embodiment is similarly by constant frequency constant amplitude
Alternating current, therefore the alternating magnetic field of constant frequency constant amplitude is generated in the surrounding space of primary coil, in this way, secondary side
Electric energy receiving terminal can receive stable electric flux, not because of the variation of such as former secondary coil coupling of extraneous factor, load
Change and change, it is ensured that the maximization of energy transmission efficiency.
Likewise, in the present embodiment, from formula (8) as can be seen that being pure resistance in the impedance Z s of magnetic resonance network
In the case of, the total input impedance Z of primary side of the electric energy transmitting terminalinAlso it is pure resistance form, system circulation can be reduced in this way, drops
Low-loss, to further increase the working efficiency of whole system.
The circuit block diagram of the 5th kind of realization method of electric energy transmitting terminal according to the present invention is shown with reference to figure 7, in this reality
It applies in example, voltage changer, current modulating circuit and magnetic resonance network and the embodiment phase in Fig. 4 of the electric energy transmitting terminal
Together, it therefore omits in the figure 7, likewise, details are not described herein with function for the circuit description of same section, circuit numbers are hereinafter
Directly quote.In the present embodiment, the impedance of the magnetic resonance network is denoted as Zs.
The difference is that in the present embodiment, the electric energy transmitting terminal further comprises third capacitance C3, the third
The first end of capacitance C3 connects the second end of the first capacitance C1, and second terminates the first end of the primary side transmitting coil,
In, the capacitance of the third capacitance C3 is identical as the capacitance of the first capacitance C1, then the impedance of the second capacitance C3
For-jX.
It in the present embodiment, can according to the circuit relationships of the first inductance, the first capacitance, the sense of third capacitance and magnetic resonance network
Obtain total input impedance Z of primary sideinFor：
The adjusting current signal Ip of current modulating circuit output can be then obtained according to the circuit structure relationship of formula (10) and Fig. 7
For：
Find out from formula (11), the primary side transmitting coil in the present embodiment is similarly by constant frequency constant amplitude
Alternating current, therefore the alternating magnetic field of constant frequency constant amplitude is generated in the surrounding space of primary coil, in this way, secondary side
Electric energy receiving terminal can receive stable electric flux, not because of the variation of such as former secondary coil coupling of extraneous factor, load
Change and change, it is ensured that the maximization of energy transmission efficiency.
Likewise, in the present embodiment, from formula (10) as can be seen that being pure resistance in the impedance Z s of magnetic resonance network
In the case of, the total input impedance Z of primary side of the electric energy transmitting terminalinAlso it is pure resistance form, system circulation can be reduced in this way, drops
Low-loss, to further increase the working efficiency of whole system.
The circuit block diagram of the 6th kind of realization method of electric energy transmitting terminal according to the present invention is shown with reference to figure 8, in this reality
It applies in example, voltage changer, current modulating circuit and magnetic resonance network and the embodiment phase in Fig. 4 of the electric energy transmitting terminal
Together, it therefore omits in fig. 8, likewise, details are not described herein with function for the circuit description of same section, circuit numbers are hereinafter
Directly quote.In the present embodiment, the impedance of the magnetic resonance network is denoted as Zs.
The difference is that in the present embodiment, the electric energy transmitting terminal further comprises third inductance L3, the third
The first end of inductance L3 connects the first end of the first capacitance C1, and second end connects the negative output terminal of the voltage changer,
Wherein, the inductance value of the third inductance L3 is identical as the inductance value of the first inductance L1, then the resistance of the third inductance L3
Resist for jX.
It in the present embodiment, can according to the circuit relationships of the first inductance, the first capacitance, the sense of third inductance and magnetic resonance network
Obtain total input impedance Z of primary sideinFor：
The adjusting current signal Ip of current modulating circuit output can be then obtained according to the circuit structure relationship of formula (12) and Fig. 8
For：
Find out from formula (13), the primary side transmitting coil in the present embodiment is similarly by constant frequency constant amplitude
Alternating current, therefore the alternating magnetic field of constant frequency constant amplitude is generated in the surrounding space of primary coil, in this way, secondary side
Electric energy receiving terminal can receive stable electric flux, not because of the variation of such as former secondary coil coupling of extraneous factor, load
Change and change, it is ensured that the maximization of energy transmission efficiency.
Likewise, in the present embodiment, from formula (13) as can be seen that being pure resistance in the impedance Z s of magnetic resonance network
In the case of, the total input impedance Z of primary side of the electric energy transmitting terminalinAlso it is pure resistance form, system circulation can be reduced in this way, drops
Low-loss, to further increase the working efficiency of whole system.
It should be noted that describing the more of the electric energy transmitting terminal in wireless electric energy transmission device in the above embodiments
Kind of realization method, but skilled person will appreciate that, it can realize the structure of the electric energy transmitting terminal of above-mentioned function and unlimited
In this, there is identical inventive concept, can realize the circuit of identical function within protection scope of the present invention.
The electric energy transmitting terminal of above-mentioned each embodiment is not limited to use in radio energy transmission system, for example, load resistance
Anti- Zd can be purely resistive or containing perceptual (capacitive) induction reactance, can also be the load for being connected directly between primary coil, can be with
It is the equiva lent impedance for being coupled by secondary coil, and being refracted to primary side.
Finally, the flow chart of the embodiment of wireless power transmission method according to the present invention, the side are shown with reference to figure 9
Method transmits energy by mutually isolated electric energy transmitting terminal and electric energy receiving terminal, as shown in figure 9, the method includes following steps
Suddenly：
S901：Electric energy is received to export the high-frequency alternating current with predeterminated frequency, the predeterminated frequency is sent out with the electric energy
It is consistent with the system operating frequency of electric energy receiving portion to penetrate part；
S902：The high-frequency alternating current is received, by carrying out current-modulation to the high-frequency alternating current, there is perseverance to obtain
Determine the adjusting current signal of frequency-invariant amplitude；
S903：Primary side transmitting coil in electric energy transmitting terminal receives the adjusting current signal, and is received accordingly to electric energy
Secondary side receiving coil in end transmits energy.
Include to the specific steps of high-frequency alternating current progress current-modulation further：Using by inductance and capacitance group
At current modulating circuit the high-frequency alternating current is modulated, wherein the resonant frequency of the inductance and capacitance with it is described
Predeterminated frequency is consistent.
Above to a kind of electric energy transmitting terminal, wireless electric energy transmission device and the radio of preferred embodiment according to the present invention
Energy transmission method has carried out detailed description, and those of ordinary skill in the art can deduce other technologies or structure and electricity accordingly
Road layout, element etc. can be applied to the embodiment.
As described above according to the embodiment of the present invention, there is no all details of detailed descriptionthe for these embodiments, also not
Limit the specific embodiment that the invention is only described.Obviously, as described above, can make many modifications and variations.This explanation
These embodiments are chosen and specifically described to book, is in order to preferably explain the principle of the present invention and practical application, belonging to making
Technical field technical staff can utilize modification of the invention and on the basis of the present invention to use well.The present invention is only by right
The limitation of claim and its full scope and equivalent.
Claims (2)
1. a kind of magnetic resonance type electric energy transmitting terminal, to transmit energy, the electric energy transmitting to the electric energy receiving terminal being isolated from it
End includes:
Voltage changer receives electric energy to export the high-frequency alternating current with predeterminated frequency；
Current modulating circuit receives the high-frequency alternating current, to obtain adjusting current signal；
Electric energy emitting portion, including primary side transmitting coil, the primary side transmitting coil are used to receive the adjusting current signal, with
Energy is transmitted to the electric energy receiving terminal；
Wherein, the predeterminated frequency is consistent with the electric energy transmitting terminal and the system operating frequency of electric energy receiving terminal, the adjusting
Current signal is the AC signal with constant frequency constant amplitude；The predeterminated frequency is 6.78MHz；
The current modulating circuit is resonance circuit, and the resonant frequency of the resonance circuit is consistent with the predeterminated frequency；It is described
Electric energy emitting portion is and the mutually independent resonance circuit of the current modulating circuit；The parameter of the electric energy emitting portion is set
It is set to so that the input impedance of the electric energy transmitting terminal shows as inductance characteristic, in order to realize opening in the voltage changer
Close pipe soft start；
Wherein, the current modulating circuit includes the resonance circuit being made of the first inductance and the first capacitance,
The first end of first inductance connects the positive output end of the voltage changer, and the second end is connected to the primary side emission lines
The first end of circle；
The first end of first capacitance is connect with the second end of first inductance, and the second termination voltage changer is born
Output end；
Wherein, the resonant frequency of first inductance and the first capacitance is consistent with the predeterminated frequency, also, first inductance
Signal with the points of common connection of the first capacitance is as the adjusting current signal.
2. a kind of magnetic resonance type wireless electric energy transmission device, including：
Voltage changer receives electric energy to export the high-frequency alternating current with predeterminated frequency；
Current modulating circuit receives the high-frequency alternating current, to obtain adjusting current signal；
Electric energy emitting portion, including primary side transmitting coil and resonant capacitance, the primary side transmitting coil receive the adjusting electric current
Signal；
Electric energy receiving portion, including secondary side receiving coil, the pair side receiving coil are transmitted for receiving from electric energy emitting portion
Energy；
Wherein, the predeterminated frequency is consistent with the system operating frequency of the wireless electric energy transmission device, the adjusting electric current letter
Number be the AC signal with constant frequency constant amplitude；The predeterminated frequency is 6.78MHz；
The current modulating circuit is resonance circuit, and the resonant frequency of the resonance circuit is consistent with the predeterminated frequency；It is described
Electric energy emitting portion is and the mutually independent resonance circuit of the current modulating circuit；The primary side transmitting coil and resonant capacitance
Parameter be provided so that the input impedance of the electric energy transmitting terminal shows as inductance characteristic, in order to realize that the voltage becomes
Switching tube soft start in parallel operation；
Wherein, the current modulating circuit includes the resonance circuit being made of the first inductance and the first capacitance,
The first end of first inductance connects the positive output end of the voltage changer, and the second end is connected to the primary side emission lines
The first end of circle；
The first end of first capacitance is connect with the second end of first inductance, and the second termination voltage changer is born
Output end；
Wherein, the resonant frequency of first inductance and the first capacitance is consistent with the predeterminated frequency also, first inductance
Signal with the points of common connection of the first capacitance is as the adjusting current signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510011896.8A CN104539061B (en) | 2015-01-06 | 2015-01-06 | A kind of electric energy transmitting terminal, wireless electric energy transmission device and wireless power transmission method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510011896.8A CN104539061B (en) | 2015-01-06 | 2015-01-06 | A kind of electric energy transmitting terminal, wireless electric energy transmission device and wireless power transmission method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104539061A CN104539061A (en) | 2015-04-22 |
| CN104539061B true CN104539061B (en) | 2018-11-13 |
Family
ID=52854551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510011896.8A Active CN104539061B (en) | 2015-01-06 | 2015-01-06 | A kind of electric energy transmitting terminal, wireless electric energy transmission device and wireless power transmission method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104539061B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186705B (en) * | 2015-08-04 | 2017-11-10 | 宁波微鹅电子科技有限公司 | A kind of efficient electric energy transmitting terminal, non-contact electric energy transmission device and method of electric energy transfer |
| CN105119391B (en) * | 2015-09-27 | 2019-01-01 | 宁波微鹅电子科技有限公司 | A kind of efficient electric energy transmitting terminal and wireless electric energy transmission device |
| CN106921218A (en) * | 2015-12-26 | 2017-07-04 | 宁波微鹅电子科技有限公司 | Electric energy transmitting terminal and apply its wireless electric energy transmission device |
| CN107437823B (en) * | 2016-05-27 | 2022-03-08 | 松下知识产权经营株式会社 | Power transmission system |
| CN107565705B (en) | 2016-07-01 | 2020-06-12 | 宁波微鹅电子科技有限公司 | Control method of electric energy transmitting terminal, electric energy transmitting terminal and non-contact electric energy transmission device |
| CN106532978B (en) * | 2016-12-05 | 2023-07-11 | 青岛鲁渝能源科技有限公司 | Wireless power transmission system and wireless power transmission control method |
| CN109637795A (en) * | 2019-01-21 | 2019-04-16 | 中车青岛四方机车车辆股份有限公司 | Contactless power supply system transmitting terminal and its unit, vehicle |
| CN111999772A (en) * | 2019-05-27 | 2020-11-27 | 华为技术有限公司 | Detection device, transmitting terminal, wireless charging system and method for metal foreign matters |
| CN110901865B (en) * | 2019-12-02 | 2020-10-30 | 深圳市威尔丽斯科技有限公司 | Unmanned underwater vehicle, underwater wireless charging device and charging method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010006524A1 (en) * | 2010-02-01 | 2011-08-04 | Paul Vahle GmbH & Co. KG, 59174 | Contact-less system for inductively transmitting electrical energy from primary energy source to secondary load, has primary induction circuit and oscillating circuit matched to frequency of harmonic component of fundamental frequency |
| CN202206194U (en) * | 2011-06-09 | 2012-04-25 | 东南大学 | Wireless energy transmitting apparatus |
| CN102856987A (en) * | 2011-06-29 | 2013-01-02 | 株式会社大福 | Contactless power-feed equipment |
| CN103390938A (en) * | 2013-06-25 | 2013-11-13 | 天奇自动化工程股份有限公司 | Non-contact power supply primary circuit with current expanding function |
| CN103746462A (en) * | 2013-07-11 | 2014-04-23 | 重庆米亚车辆技术有限公司 | Bilateral LCC compensation network used for wireless electricity transmission and tuning method for same |
| CN103814503A (en) * | 2011-06-27 | 2014-05-21 | 奥克兰联合服务有限公司 | Load control for bi-directional inductive power transfer systems |
| CN204334131U (en) * | 2015-01-06 | 2015-05-13 | 钟霞 | A kind of electric energy transmitting terminal and wireless electric energy transmission device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3491178B2 (en) * | 1995-05-09 | 2004-01-26 | 株式会社椿本チエイン | Contactless power supply system |
-
2015
- 2015-01-06 CN CN201510011896.8A patent/CN104539061B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010006524A1 (en) * | 2010-02-01 | 2011-08-04 | Paul Vahle GmbH & Co. KG, 59174 | Contact-less system for inductively transmitting electrical energy from primary energy source to secondary load, has primary induction circuit and oscillating circuit matched to frequency of harmonic component of fundamental frequency |
| CN202206194U (en) * | 2011-06-09 | 2012-04-25 | 东南大学 | Wireless energy transmitting apparatus |
| CN103814503A (en) * | 2011-06-27 | 2014-05-21 | 奥克兰联合服务有限公司 | Load control for bi-directional inductive power transfer systems |
| CN102856987A (en) * | 2011-06-29 | 2013-01-02 | 株式会社大福 | Contactless power-feed equipment |
| CN103390938A (en) * | 2013-06-25 | 2013-11-13 | 天奇自动化工程股份有限公司 | Non-contact power supply primary circuit with current expanding function |
| CN103746462A (en) * | 2013-07-11 | 2014-04-23 | 重庆米亚车辆技术有限公司 | Bilateral LCC compensation network used for wireless electricity transmission and tuning method for same |
| CN204334131U (en) * | 2015-01-06 | 2015-05-13 | 钟霞 | A kind of electric energy transmitting terminal and wireless electric energy transmission device |
Non-Patent Citations (3)
| Title |
|---|
| CLC谐振型感应电能传输系统的H∞控制;戴欣等;《中国电机工程学报》;20101025;第30卷(第30期);第47-53页 * |
| 基于无源谐振恒流网络的多路输出LED驱动电源;罗全明等;《中国电机工程学报》;20130625;第33卷(第18期);第73-79页 * |
| 无接触电能传输系统的设计研究;林宁;《中国优秀硕士学位论文全文数据库》;20110715;正文第8-78页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104539061A (en) | 2015-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104539061B (en) | A kind of electric energy transmitting terminal, wireless electric energy transmission device and wireless power transmission method | |
| CN107769573B (en) | The WPT system constant current constant voltage of bilateral LCC network exports adjustable parameter setting method | |
| JP5930328B2 (en) | System for wireless power transmission | |
| CN109245231A (en) | A kind of wireless charging topological structure with nature constant pressure and flow output characteristics | |
| CN109617250A (en) | A kind of anti-offset radio energy transmission system based on combined topology | |
| CN106532987B (en) | A kind of load identification method about multi-load radio energy transmission system | |
| CN109245542A (en) | A kind of symmetrical power converter circuit topological structure and its control method | |
| CN108448692A (en) | A kind of electric vehicle wireless charging topological structure with offset adaptivity | |
| CN104701999B (en) | Mode of resonance contactless power supply device, electric energy transmitting terminal and control method | |
| CN114825656B (en) | Wireless power and data synchronous transmission system and data modulation method | |
| CN109217496A (en) | The parameters analysis method of bilateral LCC compensation circuit in radio energy transmission system | |
| CN110460449A (en) | Repeater and method of supplying power to | |
| CN210167861U (en) | Multichannel non-contact power supply system with fundamental wave-harmonic wave parallel energy transfer function | |
| CN107404155A (en) | A kind of wireless energy transform device | |
| CN204334131U (en) | A kind of electric energy transmitting terminal and wireless electric energy transmission device | |
| CN104124764A (en) | Wireless power transmission receiving end, system and receiving method | |
| CN207559698U (en) | A kind of wireless energy transform device | |
| CN109888892A (en) | A kind of wireless charging system with anti-offset characteristic | |
| CN115459461B (en) | Multi-relay wireless energy information parallel transmission system based on bipolar coils | |
| JP2014033499A (en) | Wireless power supply system, wireless power supply device, and wireless power receiving device | |
| CN113675956A (en) | Staggered anti-deviation constant-voltage resonant wireless power transmission system | |
| CN110417131A (en) | A kind of fundamental wave-harmonic wave passes the multichannel contactless power supply system of energy parallel | |
| CN106921218A (en) | Electric energy transmitting terminal and apply its wireless electric energy transmission device | |
| CN105141139A (en) | Local communication network (LCL) structure for inductive power transfer (IPT) system and parameter design method of LCL structure | |
| CN114744774A (en) | CPT system topological structure based on double-frequency transmission |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: NINGBO WEIE ELECTRONIC TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHONG XIA Effective date: 20150623 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20150623 Address after: West Street in the official Zhejiang city of Ningbo province Zhenhai District 315200 Village No. 777 Applicant after: Ningbo Wei E Electronic Science and Technology Co., Ltd. Address before: 315201 Zhejiang province Jiangbei District of Ningbo Lake Garden Applicant before: Zhong Xia |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |