CN107346918A - A kind of wireless electric energy transmission device - Google Patents
A kind of wireless electric energy transmission device Download PDFInfo
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- CN107346918A CN107346918A CN201610619347.3A CN201610619347A CN107346918A CN 107346918 A CN107346918 A CN 107346918A CN 201610619347 A CN201610619347 A CN 201610619347A CN 107346918 A CN107346918 A CN 107346918A
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- electric energy
- coil
- electric capacity
- compensating
- transmission device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
Abstract
The invention discloses a kind of wireless electric energy transmission device.By the way that primary compensation capacitor (or secondary compensating electric capacity) is arranged to include N number of sub- compensating electric capacity, N number of sub- compensating electric capacity, which is divided equally, to be connected in electric energy transmitting coil (or electric energy receiving coil), and electric energy transmitting coil (or electric energy receiving coil) is correspondingly divided into N equal portions.Pass through the attachment structure of above-mentioned distributed capacitor, the voltage of every section of electric energy transmitting coil (or electric energy receiving coil) can be enabled to reduce, so as to reduce the circulation of transmitting coil common mode current over the ground or receiving coil to metal, but primary side or the total compensating electric capacity of secondary and the resonant frequency of coil are consistent with system operating frequency, it is ensured that energy transmission efficiency highest.
Description
Technical field
The present invention relates to wireless power transmission field, more specifically to a kind of wireless electric energy transmission device.
Background technology
The wireless charging system of magnetic resonance type includes electric energy transmitting terminal and electric energy receiving terminal, as shown in figure 1, electric energy is launched
End receives external electric energy generation space magnetic field and energy is wirelessly transferred to electric energy receiving terminal.
In order to make electric energy receiving terminal induct space magnetic field in a wider context to produce voltage electron equipment, Yi Zhongfang
Formula is to use the size and inductance value of transmitting coil in increase electric energy transmitting terminal, but increases the size and inductance value of transmitting coil, past
Toward the number of turn and area for needing increase transmitting coil, and can be increased according to the calculation formula of electric capacity, C=ε S/D, increase area coil
Parasitic capacitance between adding transmitting coil over the ground, according to common mode current ICMRelation between parasitic capacitance, ICM=CdV/dt.
As shown in Fig. 2 high-frequency ac voltage is more readily formed to the earth common mode current by this parasitic capacitance on coil, add
EMC Conduction Interferences.Also, after the size increase of transmitting coil, then the girth of coil can accordingly increase, if coil midstream mistake
The electric current of high-frequency alternating, then high frequency electric is more readily formed electromagenetic wave radiation and gone out, and increases EMC radiation interferences.
Another way is by increasing the alternating current in transmitting coil, to increase the magnetic field of transmitting coil, this side
Formula can increase the voltage (V=j ω LsIs) at transmitting coil both ends, it is necessary to the resonant capacitance Cs and transmitting coil of bigger pressure voltage
Ls resonance on system operating frequency point, and after the voltage increase of transmitting coil, according to the calculation formula of above-mentioned common mode current,
Also common mode current over the ground can be increased.
The content of the invention
In view of this, the present invention proposes a kind of wireless electric energy transmission device.Electric energy is sent out by more sub- compensating electric capacities
Ray circle (or electric energy receiving coil) carries out segmented compensation, to cause the electricity of every section of electric energy transmitting coil (or electric energy receiving coil)
Pressure energy enough reduces, so as to reduce the common mode current of transmitting coil (or receiving coil) over the ground.
In a first aspect, a kind of wireless electric energy transmission device according to the present invention, including electric energy emitting portion and electric energy receive
Part, the electric energy emitting portion include inverter circuit, electric energy transmitting coil and primary compensation capacitor,
The inverter circuit receives d. c. voltage signal with output AC voltage signal；
The electric energy transmitting coil is used to receive the ac voltage signal, to transmit energy to the electric energy receiving portion
Amount；
The primary compensation capacitor is to compensate the inductance of the electric energy transmitting coil, to cause the electric energy transmitting coil
It is consistent with system operating frequency with the resonant frequency of the primary compensation capacitor；
The primary compensation capacitor includes N number of sub- compensating electric capacity, and N number of sub- compensating electric capacity distribution is connected to the electricity
Diverse location in energy transmitting coil；
The electric energy receiving portion receives the energy from the transmission of electric energy emitting portion, is supplied with producing predetermined output voltage
Load.
Preferably, the inductance of the electric energy transmitting coil includes the leakage inductance of the electric energy transmitting coil structure and excitatory electricity
Sense.
Preferably, N number of sub- compensating electric capacity is connected to the diverse location of the electric energy transmitting coil, by the electric energy
Transmitting coil is divided into N section coils.
Preferably, N number of sub- compensating electric capacity respectively is connected to the diverse location of the electric energy transmitting coil, by institute
State electric energy transmitting coil and be divided into N equal portions.
Preferably, the capacitance of N number of sub- compensating electric capacity is equal.
Preferably, correspondingly one section in N number of sub- compensating electric capacity in an electric capacity and the electric energy transmitting coil
Coil resonance, also, both resonant frequencies are consistent with system operating frequency.
Second aspect, received according to a kind of wireless electric energy transmission device of the present invention, including electric energy emitting portion and electric energy
Part, the electric energy receiving portion include electric energy receiving coil and secondary compensating electric capacity,
The secondary compensating electric capacity is to compensate the inductance of the electric energy receiving coil, to cause the electric energy receiving coil
It is consistent with system operating frequency with the resonant frequency of the secondary compensating electric capacity；
The secondary compensating electric capacity includes N number of sub- compensating electric capacity, and N number of sub- compensating electric capacity distribution is connected to the electricity
Diverse location in energy receiving coil.
Preferably, the inductance of the electric energy receiving coil includes the leakage inductance and magnetizing inductance of the electric energy receiving coil.
Preferably, N number of sub- compensating electric capacity of the secondary compensating electric capacity respectively is connected to the electric energy receiving coil
Diverse location, the electric energy receiving coil is divided into N equal portions.
Preferably, the capacitance of N number of sub- compensating electric capacity of the secondary compensating electric capacity is equal；
It is corresponding in an electric capacity and the electric energy receiving coil in N number of sub- compensating electric capacity of the secondary compensating electric capacity
One section of ground coil resonance, also, its resonant frequency is consistent with system operating frequency.
Further, the electric energy receiving portion also includes screen layer, and the screen layer is positioned over the electric energy and receives line
Between circle and electronic equipment.
Preferably, the screen layer includes magnetic masking layer, and the magnetic masking layer is positioned over the electric energy receiving coil and electricity
Between sub- equipment.
Preferably, the electro-magnetic screen layer includes magnetic masking layer and copper shield, the magnetic masking layer and copper shield according to
It is secondary to be positioned between electric energy receiving coil and electronic equipment.
Preferably, the magnetic masking layer includes hollow area and solid area.
Preferably, N number of sub- compensating electric capacity is connected to the coil pin exit of the electric energy receiving coil.
Preferably, N number of sub- compensating electric capacity distribution is connected among the electric energy receiving coil, and described N number of
Sub- compensating electric capacity is positioned over the hollow area of the magnetic masking layer.
Preferably, the electric energy receiving portion also includes rectification circuit and DC-DC voltage change-over circuit,
The electronic devices of rectification circuit and the DC-DC voltage change-over circuit are positioned over the magnetic masking layer
Hollow area；
N number of sub- compensating electric capacity is connected to the coil pin exit of the electric energy receiving coil, and the electric energy receives
The coil pin of coil is connected to the electronic devices.
In summary, according to the wireless electric energy transmission device of the present invention.By the way that primary compensation capacitor is arranged to comprising N number of
Sub- compensating electric capacity, N number of sub- compensating electric capacity, which is divided equally, to be connected in electric energy transmitting coil, and electric energy transmitting coil is correspondingly equal
It is divided into N equal portions.Correspondingly one section of coil in N number of sub- compensating electric capacity in an electric capacity and the electric energy transmitting coil
Resonance, also, its resonant frequency is consistent with the system operating frequency., can be with by above-mentioned distributed capacitor attachment structure
The voltage of every section of electric energy transmitting coil enable to reduce, so as to reduce the common mode current of transmitting coil over the ground.But total primary side
Compensating electric capacity and the resonant frequency of electric energy transmitting coil are consistent with system operating frequency, it is ensured that energy transmission efficiency highest.
On the other hand, secondary compensating electric capacity is arranged to include N number of sub- compensation electricity by wireless electric energy transmission device of the invention
Hold, electric energy receiving coil is divided into N equal portions, equally may be such that the voltage of every section of electric energy receiving coil can reduce, so as to subtract
Small receiving coil improves energy transmission efficiency to the circulation of the metal either copper shield of electronic equipment.
Brief description of the drawings
Fig. 1 show the structure of the wireless charging system of prior art；
Fig. 2 show the schematic diagram of transmitting coil caused common mode current over the ground；
Fig. 3 show a kind of signal of the electric energy transmitting coil part in the wireless electric energy transmission device according to the present invention
Figure；
Fig. 4 show the circuit diagram of the first embodiment of the wireless electric energy transmission device according to the present invention；
Fig. 5 show the circuit diagram of the second embodiment of the wireless electric energy transmission device according to the present invention；
Fig. 6 show the circuit diagram of the 3rd embodiment of the wireless electric energy transmission device according to the present invention；
Fig. 7 show the circuit diagram of the fourth embodiment of the wireless electric energy transmission device according to the present invention；
Fig. 8 show the circuit diagram of the 5th embodiment of the wireless electric energy transmission device according to the present invention；
Fig. 9 show the circuit diagram of the sixth embodiment of the wireless electric energy transmission device according to the present invention；
Figure 10 show the circuit diagram of the 7th embodiment of the wireless electric energy transmission device according to the present invention.
Embodiment
Some currently preferred embodiments of the present invention is described in detail below with reference to accompanying drawing, but the invention is not restricted to this.
The one kind for the electric energy transmitting coil part being shown with reference to figure 3 in the wireless electric energy transmission device according to the present invention is shown
It is intended to, the electric energy transmitting coil part includes inverter circuit (not shown in Fig. 3), and inverter circuit is used for external dc electricity
Pressure signal is converted to ac voltage signal output, and the ac voltage signal is transferred to the electric energy transmitting coil.
The electric energy transmitting coil part also includes electric energy transmitting coil and primary compensation capacitor, the primary compensation capacitor
To compensate the inductance of the electric energy transmitting coil, to cause the resonance of the electric energy transmitting coil and the primary compensation capacitor
Frequency is consistent with system operating frequency；Here, the inductance of the electric energy transmitting coil is included in the electric energy transmitting coil structure
Leakage inductance and magnetizing inductance, the inductance of the electric energy transmitting coil be substantially invariable value, impedance and the excitation electricity of compensating electric capacity
Sense and the two-part induction reactance resonant operational of leakage inductance.The system operating frequency is the working frequency of wireless electric energy transmission device, is remembered
For ω0, the system operating frequency of the wireless electric energy transmission device is, example set in advance according to circuit structure and efficiency requirements
As optimized frequency is arranged to 6.78MHz.
In present embodiment, the primary compensation capacitor includes N number of sub- compensating electric capacity, N number of sub- compensating electric capacity distribution
Formula is connected to the diverse location in the electric energy transmitting coil, wherein, N is the positive integer more than 1.As shown in figure 3, it is using N as 3
Example, the primary compensation capacitor include sub- compensating electric capacity Cs1, sub- compensating electric capacity Cs2, sub- compensating electric capacity Cs3.
Further, as shown in figure 3, N number of sub- compensating electric capacity respectively is connected to the electric energy transmitting coil
Diverse location, the electric energy transmitting coil is divided into N equal portions.3 sub- compensating electric capacities shown in Fig. 3 are by electric energy emission lines
Circle is divided into three equal parts, such as loop A B sections, coil CD sections and coil DF sections.For the design of more Optimal Parameters, described here 3
The capacitance of individual sub- compensating electric capacity is equal, also, electric capacity Cs1 and adjacent one section of transmitting coil such as AB sections resonance, and resonance frequency
Rate is also system operating frequency 6.78MHz.
The distribution type electric energy transmitting coil being illustrated in figure 4 in Fig. 3 applies the application electricity in wireless electric energy transmission device
Wireless electric energy transmission device also includes electric energy receiving portion (including electric energy receiving coil Ld and secondary compensating electric capacity in Lu Tu, Fig. 4
Cd).As shown in figure 4, three sub- compensating electric capacities are designated as Cs1, Cs2, Cs3 respectively, three sections of transmitting coils be designated as respectively Ls1, Ls2,
Ls3, if the inductance of total transmitting coil is Ls, the Cs of total compensating electric capacity, then the distributed frame according to Fig. 4, then respectively
The capacitance of individual sub- compensating electric capacity is arranged to Cs1=Cs2=Cs3=3Cs, and the inductance value of each sectional coil is Ls1=Ls2=Ls3=
Ls/3, so, the voltage at each sectional coil both ends is VLs/3.
So, the voltage at coil Ls1 both ends is changed into VLs1=VLs/3；Because sub- compensating electric capacity Cs1 and coil Ls1 are in work
Resonance on working frequency point, then the equiva lent impedance at compensating electric capacity Cs1 and coil Ls1 both ends is 0,
That is 1/j ω Cs1+j ω Ls1=0,
The voltage sum at compensating electric capacity Cs1 and coil Ls1 both ends is 0 (i.e. VLs1+VCs1=0), and energy can obtain on coil
It is high to maximum transmission, efficiency of transmission.
Similarly, so the voltage VLs2=VLs/3 at coil Ls2 sections both ends, similarly, sub- compensating electric capacity Cs2 and coil Ls2 exist
The voltage sum at resonance in working frequency point, compensating electric capacity Cs2 and coil Ls2 both ends is 0, the voltage VLs3 at coil Ls3 both ends
=VLs/3, similarly, sub- compensating electric capacity Cs3 and coil the Ls3 resonance in working frequency point, compensating electric capacity Cs3 and coil Ls3 two
The voltage sum at end is 0.
From the aforegoing it can be seen that for compared to being compensated to whole coil, using distributed compensation mode, every section of coil
The voltage at both ends is reduced to distributed VLs/N from original VLs, then the calculating of the common mode current in background technology is public
Formula, the common mode current of transmitting coil over the ground are also reduced to original 1/N.The embodiment of the present invention is highly suitable for transmitting coil size
Larger occasion, because the big common mode capacitance then over the ground of size is big, reduced by way of being segmented series capacitance in coil
Leaping voltage, common mode current can be reduced well, reduce EMC Conduction Interference.
The compensating electric capacity pressure voltage at transmitting coil both ends can be seen that also from VLs by the structure of above-mentioned transmitting coil
Also VLs/3 is changed to, therefore the smaller impedance matching capacitances of pressure voltage can be chosen, reduces cost.And sectional coil two
After the voltage at end reduces, the reliability of system is further increased.
It should be noted that even if the parameter designing of the distribution type electric energy transmitting coil does not have the equalization of above-mentioned optimization
Part design, for example, N number of sub- compensating electric capacity is connected to the diverse location of the electric energy transmitting coil, the electric energy is sent out
Ray circle is divided into N section coils.But as long as entirety meets N sections distributed inductance series connection Ls1+Ls2+ ... Lsn=Ls and N number of distribution
Formula electric capacity series connection Cs1=Cs2=Csn=NCs, then the energy transmission efficiency of system will not decline, and distributed sectional coil
On voltage can all decline, reduce EMC Conduction Interferences.
Fig. 5 show the circuit diagram of the second embodiment of the wireless electric energy transmission device according to the present invention；In the present embodiment
In, the transmitting coil part includes N number of sub- compensating electric capacity (Cs1 ... .Csn), and correspondingly, the electric energy transmitting coil is divided
For N equal portions (Ls1 ... .Lsn), here, the capacitance of N number of sub- compensating electric capacity can be with equal or unequal, the N sections emission lines
The impedance of circle can also be equal or unequal, but total resistance of the total impedance of the transmitting coil and N number of sub- compensating electric capacity
Anti- resonant frequency is consistent with system operating frequency, to ensure the maximization of efficiency of transmission, so by dividing transmitting coil
Section compensation, the pressure drop for the transmitting coil that can be significantly reduces, so as to reduce common mode current.N is positive integer more than 1, sub- benefit
The number for repaying electric capacity is together decided on according to requirement of the user to common mode current and cost, such as requires high to common mode current
The number of sub- compensating electric capacity can be improved, it is conditional to cost, reduce the number of sub- compensating electric capacity.
Fig. 6 show the circuit diagram of the 3rd embodiment of the wireless electric energy transmission device according to the present invention.In the present embodiment
In, electric energy transmitting coil in Fig. 5 with unanimously, will not be repeated here.In the present embodiment, the secondary compensating electric capacity is compensating
The inductance of the electric energy receiving coil, to cause the resonant frequency of the electric energy receiving coil and the secondary compensating electric capacity with being
Working frequency of uniting is consistent；The inductance of the electric energy receiving coil includes leakage inductance and excitatory electricity in the electric energy receiving coil structure
Sense.
In the present embodiment, the secondary compensating electric capacity includes N number of sub- compensating electric capacity (Cd1 ... .Cdn), N number of sub- compensation
Capacitance profile formula is connected to the diverse location in the electric energy transmitting coil；Further, the appearance of N number of sub- compensating electric capacity
It is worth to be equal；N number of sub- compensating electric capacity of the secondary compensating electric capacity respectively is connected to the different positions of the electric energy receiving coil
Put, the electric energy receiving coil is divided into N equal portions (such as Ld1 ... .Ldn), and one in N number of sub- compensating electric capacity
Correspondingly one section of coil resonance in electric capacity and the electric energy receiving coil, (such as Cd1 and Ld1 resonance), also, its resonant frequency
It is consistent with system operating frequency (6.78MHz).
Similarly, for secondary, by way of above-mentioned segmented receiving coil, each section of receiving coil can be caused
On pressure drop reduce, so as to which common mode current over the ground is reduced, reduce the EMC interference of system.
Fig. 7 show the circuit diagram of the fourth embodiment of the wireless electric energy transmission device according to the present invention.In the present embodiment
In, the electric energy receiving portion also includes screen layer, the screen layer be positioned over the electric energy receiving coil and electronic equipment it
Between.
In actual applications, the electro-magnetic screen layer includes magnetic masking layer and copper shield, magnetic masking layer and the copper screen
Layer is covered to be sequentially placed between electric energy receiving coil and electronic equipment.As shown in fig. 7, the magnetic masking layer include hollow area and
Openwork part in solid area, hollow area such as Fig. 7.Sub- compensating electric capacity CS1 and CS2 is connected to the centre of receiving coil, with
Receiving coil is divided into three equal parts.
It is readily appreciated that, in less demanding occasion, the screen layer can only include magnetic masking layer, and the magnetic masking layer is put
It is placed between the electric energy receiving coil and electronic equipment.
Due to being magnetic masking layer between receiving coil and copper sheet (or metal of electronic equipment), the dielectric constant of magnetic sheet is than empty
Much higher (the ε of ε ＞ 10 of gas0), while the spacing of receiving coil and copper sheet is also smaller, therefore the parasitic capacitance formed also can be very big,
The circulation of calculation formula in background technology, receiving coil and copper sheet (or metal) time can be very big.In the present embodiment,
By the way that receiving coil is divided into multistage separated time coil structures, according to the calculating process of above-mentioned transmitting coil it can be deduced that receiving coil
The voltage of every section of sub-coil will greatly reduce, so as to reduce receiving coil to copper sheet or the circulation of metal, can effectively carry
The efficiency of high energy transmission.
Fig. 8 show the circuit diagram of the 5th embodiment of the wireless electric energy transmission device according to the present invention.The present embodiment is
Further improvement in Fig. 7 embodiments, the hollow area of the magnetic sheet include hollow out 1 and hollow out 2, wherein the sub- compensation electricity
Hold Cs1 and Cs2 distributions to be connected among the electric energy receiving coil, and the sub- compensating electric capacity is positioned over the magnetic screen
The hollow area of layer, such as the position of hollow out 2 in Fig. 8.So, compensating electric capacity can be very good respectively receiving coil, also, not have
Increase overall thickness.
Fig. 9 show the circuit diagram of the sixth embodiment of the wireless electric energy transmission device according to the present invention.In the present embodiment
In, N number of sub- compensating electric capacity is connected to the coil pin exit of the electric energy receiving coil.For example, the son compensation in Fig. 9
Electric capacity CS1 and CS2 are connected to coil pin exit, are so advantageous to technological operation and coil and the magnetic sheet of receiving coil
It is integrated.
Figure 10 is the circuit diagram according to the 7th embodiment of the wireless electric energy transmission device of the present invention.In the present embodiment,
The electric energy receiving portion also includes rectification circuit and DC-DC voltage change-over circuit, the rectification circuit and DC-to-dc
The electronic devices of voltage conversion circuit are positioned over the hollow area of the magnetic masking layer, such as the device in Figure 10, sub- compensation
Electric capacity such as CS1 and CS2 are connected to the coil pin exit of the electric energy receiving coil, the coil pipe of the electric energy receiving coil
Pin is connected to the electronic devices.So, sub- compensating electric capacity such as CS1 and CS2 can be caused and realize that electric energy changes work(
The electronic component or part electronic component of energy are placed on the circuit board in the void region of magnetic sheet, can save space, more
Be advantageous to be integrated into electronic equipment internal.
It should be noted that above-described embodiment can be combined or is used separately, such as electric energy transmitting coil is distributed electrical
Hold structure, or electric energy receiving coil is distributed capacitive structure, or electric energy transmitting coil and electric energy receiving coil it is same
When be distributed capacitive structure, user can be selected according to demand.
Detailed description has been carried out to the wireless electric energy transmission device according to the preferred embodiments of the present invention above, but on this
The circuit and beneficial effect of patent should not be considered as being limited only to described above, and disclosed embodiment and accompanying drawing can be more
The good understanding present invention, therefore, embodiment disclosed above and Figure of description content are in order to be better understood from the present invention, originally
Invention protection is not limited to limit the scope of the present disclosure, replacement, modification of the those of ordinary skill in the art to the embodiment of the present invention
Within protection scope of the present invention.
Claims (17)
1. a kind of wireless electric energy transmission device, including electric energy emitting portion and electric energy receiving portion, it is characterised in that the electric energy
Emitting portion includes inverter circuit, electric energy transmitting coil and primary compensation capacitor,
The inverter circuit receives d. c. voltage signal with output AC voltage signal；
The electric energy transmitting coil is used to receive the ac voltage signal, with to the electric energy receiving portion transmission energy；
The primary compensation capacitor is to compensate the inductance of the electric energy transmitting coil, to cause the electric energy transmitting coil and institute
The resonant frequency for stating primary compensation capacitor is consistent with system operating frequency；
The primary compensation capacitor includes N number of sub- compensating electric capacity, and N number of sub- compensating electric capacity distribution is connected to the electric energy hair
Diverse location in ray circle；
The electric energy receiving portion receives the energy from the transmission of electric energy emitting portion, negative with the output voltage supply for producing predetermined
Carry.
2. wireless electric energy transmission device according to claim 1, it is characterised in that the inductance bag of the electric energy transmitting coil
Include the leakage inductance and magnetizing inductance of the electric energy transmitting coil structure.
3. wireless electric energy transmission device according to claim 1, it is characterised in that N number of sub- compensating electric capacity is connected to
The diverse location of the electric energy transmitting coil, the electric energy transmitting coil is divided into N section coils.
4. wireless electric energy transmission device according to claim 1, it is characterised in that N number of sub- compensating electric capacity is respectively
The diverse location of the electric energy transmitting coil is connected to, the electric energy transmitting coil is divided into N equal portions.
5. wireless electric energy transmission device according to claim 4, it is characterised in that the capacitance of N number of sub- compensating electric capacity
To be equal.
6. wireless electric energy transmission device according to claim 5, it is characterised in that one in N number of sub- compensating electric capacity
Correspondingly one section of coil resonance in individual electric capacity and the electric energy transmitting coil, also, both resonant frequencies and system work frequency
Rate is consistent.
7. a kind of wireless electric energy transmission device, including electric energy emitting portion and electric energy receiving portion, it is characterised in that the electric energy
Receiving portion includes electric energy receiving coil and secondary compensating electric capacity,
The secondary compensating electric capacity is to compensate the inductance of the electric energy receiving coil, to cause the electric energy receiving coil and institute
The resonant frequency for stating secondary compensating electric capacity is consistent with system operating frequency；
The secondary compensating electric capacity includes N number of sub- compensating electric capacity, and N number of sub- compensating electric capacity distribution is connected to the electric energy and connect
Diverse location in take-up circle.
8. wireless electric energy transmission device according to claim 7, it is characterised in that the inductance bag of the electric energy receiving coil
Include the leakage inductance and magnetizing inductance of the electric energy receiving coil.
9. wireless electric energy transmission device according to claim 7, it is characterised in that N number of son of the secondary compensating electric capacity
Compensating electric capacity respectively is connected to the diverse location of the electric energy receiving coil, and the electric energy receiving coil is divided into N etc.
Part.
10. wireless electric energy transmission device according to claim 9, it is characterised in that N number of son of the secondary compensating electric capacity
The capacitance of compensating electric capacity is equal；
In N number of sub- compensating electric capacity of the secondary compensating electric capacity correspondingly one in an electric capacity and the electric energy receiving coil
Section coil resonance, also, its resonant frequency is consistent with system operating frequency.
11. wireless electric energy transmission device according to claim 7, it is characterised in that the electric energy receiving portion also includes
Screen layer, the screen layer are positioned between the electric energy receiving coil and electronic equipment.
12. wireless electric energy transmission device according to claim 7, it is characterised in that the screen layer includes magnetic masking layer,
The magnetic masking layer is positioned between the electric energy receiving coil and electronic equipment.
13. wireless electric energy transmission device according to claim 7, it is characterised in that the electro-magnetic screen layer includes magnetic cup
Layer and copper shield are covered, the magnetic masking layer and copper shield are sequentially placed between electric energy receiving coil and electronic equipment.
14. the wireless electric energy transmission device according to claim 12 or 13, it is characterised in that the magnetic masking layer includes sky
Heart district domain and solid area.
15. wireless electric energy transmission device according to claim 7, it is characterised in that N number of sub- compensating electric capacity is connected to
The coil pin exit of the electric energy receiving coil.
16. wireless electric energy transmission device according to claim 14, it is characterised in that N number of sub- compensating electric capacity distribution
It is connected among the electric energy receiving coil, and N number of sub- compensating electric capacity is positioned over the hollow section of the magnetic masking layer
Domain.
17. wireless electric energy transmission device according to claim 14, it is characterised in that the electric energy receiving portion also includes
Rectification circuit and DC-DC voltage change-over circuit,
The electronic devices of rectification circuit and the DC-DC voltage change-over circuit are positioned over the hollow of the magnetic masking layer
Region；
N number of sub- compensating electric capacity is connected to the coil pin exit of the electric energy receiving coil, the electric energy receiving coil
Coil pin be connected to the electronic devices.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110113822.0A CN112688439A (en) | 2016-05-06 | 2016-07-28 | Wireless power transmission device |
| US15/581,754 US20170324281A1 (en) | 2016-05-06 | 2017-04-28 | Wireless power trnsfer device |
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| CN201610300042 | 2016-05-06 | ||
| CN2016103000426 | 2016-05-06 |
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| CN201610619347.3A Pending CN107346918A (en) | 2016-05-06 | 2016-07-28 | A kind of wireless electric energy transmission device |
| CN202110113822.0A Pending CN112688439A (en) | 2016-05-06 | 2016-07-28 | Wireless power transmission device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106961165A (en) * | 2017-05-23 | 2017-07-18 | 宁波微鹅电子科技有限公司 | Wireless power transmission circuit, radio energy transmitting terminal and radio energy receiving terminal |
| CN108511174A (en) * | 2017-12-25 | 2018-09-07 | 宁波微鹅电子科技有限公司 | A kind of coil module, radio energy radiating circuit and receiving circuit |
| CN112311204A (en) * | 2020-10-21 | 2021-02-02 | 哈尔滨工业大学 | Segmented series compensation method for reducing coil loss of resonant converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114189058B (en) * | 2021-12-21 | 2023-11-21 | 昆明理工大学 | Device for providing electric energy for a plurality of passive electronic tags in large-scale space |
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| CN112688439A (en) | 2021-04-20 |
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Application publication date: 20171114 |