CN203871932U - Wireless electric energy transmission apparatus - Google Patents
Wireless electric energy transmission apparatus Download PDFInfo
- Publication number
- CN203871932U CN203871932U CN201420184280.1U CN201420184280U CN203871932U CN 203871932 U CN203871932 U CN 203871932U CN 201420184280 U CN201420184280 U CN 201420184280U CN 203871932 U CN203871932 U CN 203871932U
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- Prior art keywords
- resonance
- receiving
- coil
- loop
- transmitting
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Abstract
A wireless electric energy transmission apparatus is composed of a high-frequency power supply, an emitter, a reception device and a load. The emitter includes a first resonance emission loop having a first emission coil, and a second resonance emission loop having a second emission coil. The reception device includes a first resonance reception loop having a first reception coil, and a second resonance reception loop having a second reception coil. A coupling coefficient between the first emission coil and the second emission coil and also between the first reception coil and the second reception coil is greater than 0.5. Energy coupling is performed between the high-frequency power supply, the first resonance emission loop and the second resonance emission loop through a transformer with a magnetic core. Energy coupling is performed between the load, the first resonance reception loop and the second resonance reception loop through the transformer with the magnetic core.
Description
Technical field
The utility model relates to a kind of energy transform device, particularly a kind of wireless energy transform device with the work of magnetic coupling resonance manner.
Background technology
Current power device uses wired connection to carry out the transmission of electric energy conventionally, and the wire transmission of electric energy cannot meet the needs of application in some occasion.The wireless transmission of energy has the feature of oneself, is adapted at using the occasion of wire power supply to use, and maybe can not use the occasion of wire power supply to use as being applicable to the inconveniences such as underwater operation, medical embedded equipment, wireless network.
According to Energy Transfer principle, at present, at home and abroad the wireless energy transmission technology of research mainly contains electromagnetic wave energy transmission technology and induction coupling energy transmission technology.
Electromagnetic wave energy transmission technology is by antenna sending and receiving, such as using microwave to carry out wireless energy transfer, this technology can realize high through-put power, the subject matter that this technology exists is can not have blocking of barrier in energy transmission path, and barrier cannot be walked around or be passed to Energy Transfer.
Induction coupling energy transmission technology, is to utilize electromagnetic induction principle, adopts loosely coupled transformer or detachable transformer to realize non-contact type energy transmission.The subject matter that this technology exists is that Energy Transfer distance is subject to the limitation of transmission principle and is limited in a millimeter grade.
Become at present the magnetic coupling resonance type wireless energy transmission technology of study hotspot, overcome the short shortcoming of existing transmission range in induction coupling energy transmission technology, but had the problems such as efficiency of transmission is lower.
The common use of existing magnetic coupling resonance type wireless energy transmission technology has the single resonance launching circuit of transmitting coil and transmitting electric capacity and the single resonance receiving loop with receiving coil and reception electric capacity of setting separated by a distance carries out the resonance work of same frequency, make energy pass to resonance receiving loop from this resonance launching circuit, wherein, the resonance frequency of resonance receiving loop and resonance launching circuit is respectively f
01, f
02, they meet respectively following condition:
Wherein, L
01, C
01be respectively the self-inductance of receiving coil and the capacitance of reception electric capacity, L
02, C
02be respectively the self-inductance of transmitting coil and the capacitance of transmitting electric capacity.
Summary of the invention
The purpose of this utility model is the wireless electric energy transmission device that will provide a kind of efficiency of transmission higher.Another object of the present utility model is the device densification that will make this kind of high-transmission efficiency.
In order to realize the purpose of this utility model, the utility model provides a kind of wireless electric energy transmission device, this kind of wireless electric energy transmission device, it is by high frequency electric source, emitter, receiving system and load form, emitter and receiving system are configured at intervals electric energy transmitting wirelessly, it is characterized in that, emitter comprises having the first resonance launching circuit of the first transmitting coil and the first transmitting electric capacity and have the second transmitting coil and the second resonance launching circuit of the second transmitting electric capacity, coupling coefficient between the first transmitting coil and the second transmitting coil is greater than 0.5, receiving system comprises that having the first receiving coil and first receives the first resonance receiving loop of electric capacity and have the second receiving coil and the second resonance receiving loop of the second reception electric capacity, and the coupling coefficient between the first receiving coil and the second receiving coil is greater than 0.5, high frequency electric source carries out Energy Coupling by the transformer with magnetic core and the first resonance launching circuit and the second resonance launching circuit, load is carried out Energy Coupling by the transformer with magnetic core and the first resonance receiving loop and the second resonance receiving loop, the first resonance tranmitting frequency of the first resonance launching circuit of setting is f
11, the second resonance tranmitting frequency of the second resonance launching circuit of setting is f
22, the first resonance receive frequency of the first resonance receiving loop of setting is f
33, the second resonance receive frequency of the second resonance receiving loop of setting is f
44, the first resonance tranmitting frequency f
11, the second resonance tranmitting frequency f
22, the first resonance receive frequency f
33with the second resonance receive frequency f
44all identical with the operating frequency of high frequency electric source, and meet respectively following condition:
Wherein, L
11and C
11be respectively total self-induction and the total capacitance of the first resonance launching circuit, L
22and C
22be respectively total self-induction and the total capacitance of the second resonance launching circuit, L
33and C
33be respectively total self-induction and the total capacitance of the first resonance receiving loop, L
44and C
44be respectively total self-induction and the total capacitance of the second resonance receiving loop, M
12be the mutual inductance between the first transmitting coil and the second transmitting coil, M
34it is the mutual inductance between the first receiving coil and the second receiving coil.
As everybody knows, the coupling coefficient between two coils equals the ratio of the square root of the product of two coils of two mutual induction amount between coil and this self-inductance separately.Therefore, the coupling coefficient between the first receiving coil and the second receiving coil equals the mutual induction amount and the ratio of the first receiving coil with the square root of the product of the second receiving coil self-inductance separately between the first receiving coil and the second receiving coil.
Preferably, the coupling coefficient between the first receiving coil and the second receiving coil is greater than 0.75.The distance of the first receiving coil and the second receiving coil is nearer, and its coupling coefficient is generally larger, and its shared Spatial General 6 R is less, is conducive to the densification of device.Conventionally, the distance of the first receiving coil and the second receiving coil is less than 10 millimeters, is preferably less than 5 millimeters, and more preferably, the distance between the first receiving coil and the second receiving coil is 0, and the first receiving coil contacts with the second receiving coil.
Preferably, the coupling between the first receiving coil and the second receiving coil adopts coupling in the same way.Coupling in the same way described here has referred to that operating current is in the time that the first receiving coil and the second receiving coil flow through, and the magnetic field that the magnetic field that the first receiving coil produces and the second receiving coil produce is mutually to strengthen.
In a preferred embodiment, the second receiving coil is positioned at the first receiving coil.The shared space of such two receiving coils is very little, is conducive to the densification of device.
In another preferred embodiment, the first receiving coil and the second receiving coil are all identical closely-coupled receiving coils of Double-wire parallel wound mode two structures of making and size.The shared space of such two receiving coils is very little, and coupling coefficient between two receiving coils is also larger, is conducive to the densification of device and strengthens two electromagnetic coupled abilities between receiving coil.
Receiving system can also comprise the 3rd resonance receiving loop with the 3rd receiving coil and the 3rd reception electric capacity, the 3rd resonance receive frequency of the 3rd resonance receiving loop of setting is also identical with the operating frequency of high frequency electric source, and, the coupling coefficient that coupling coefficient between the 3rd receiving coil and the first receiving coil is greater than between 0.5, the three receiving coil and the second receiving coil is also greater than 0.5.
Conventionally, the distance of the first transmitting coil and the second transmitting coil is less than 10 millimeters, is preferably less than 5 millimeters, and more preferably, the distance between the first transmitting coil and the second transmitting coil is 0, and the first transmitting coil contacts with the second transmitting coil.
In a preferred embodiment, the second transmitting coil is positioned at the first transmitting coil.The shared space of such two transmitting coils is very little, is conducive to the densification of device.
In another preferred embodiment, the first transmitting coil and the second transmitting coil are all identical closely-coupled transmitting coils of Double-wire parallel wound mode two structures of making and size.The shared space of such two transmitting coils is very little, and coupling coefficient between two transmitting coils is also larger, is conducive to the densification of device and strengthens two electromagnetic coupled abilities between transmitting coil.
Preferably, the coupling between the first transmitting coil and the second transmitting coil adopts coupling in the same way.
Preferably, the first resonance receive frequency f
33with the second resonance receive frequency f
44meet respectively following condition:
Preferably, the first resonance tranmitting frequency f
11with the second resonance tranmitting frequency f
22meet respectively following condition:
Emitter can also comprise the 3rd resonance launching circuit with the 3rd transmitting coil and the 3rd transmitting electric capacity, the 3rd resonance tranmitting frequency of the 3rd resonance launching circuit of setting is also identical with the operating frequency of high frequency electric source, and, the coupling coefficient that coupling coefficient between the 3rd transmitting coil and the first transmitting coil is greater than between 0.5, the three transmitting coil and the second transmitting coil is also greater than 0.5.
In a preferred embodiment, by one, the transformer with magnetic core and the first resonance launching circuit carry out Energy Coupling to high frequency electric source, and carry out Energy Coupling by another transformer with magnetic core and the second resonance launching circuit.
In a preferred embodiment, by one, the transformer with magnetic core and the first resonance receiving loop carry out Energy Coupling in load, and the transformer with magnetic core and the second resonance receiving loop carry out Energy Coupling by another.
Device of the present utility model has comprised that two resonance launching circuits with close Energy Coupling relation and two have the resonance receiving loop of close Energy Coupling relation, and set and the diverse resonance receive frequency of resonance frequency or the resonance tranmitting frequency of the single resonance receiving loop that there is no coupled relation of prior art, make can carry out efficiently the transmission of wireless energy between two launching circuits of device of the present utility model and two receiving loops, theoretical and experiment all prove to significantly improve the efficiency of transmission of its wireless energy.
In addition, the second receiving coil of the utility model device can be positioned at the first receiving coil, and the second transmitting coil can be positioned at the first transmitting coil, and therefore the utility model device also has the features such as compact conformation.
Also have, in device of the present utility model, high frequency electric source carries out Energy Coupling by the transformer with magnetic core and resonance launching circuit, and load is also carried out Energy Coupling by the transformer with magnetic core and resonance receiving loop, is conducive to reduce the volume of whole device and improves efficiency of transmission.
Brief description of the drawings
Figure l is the structural representation of wireless electric energy transmission device of the present utility model.
Fig. 2 is the equivalent circuit diagram of the wireless electric energy transmission device shown in Fig. 1.
Fig. 3 is the simplified electrical circuit diagram of the equivalent circuit diagram shown in Fig. 2.
Fig. 4 is the schematic diagram of another embodiment of wireless electric energy transmission device of the present utility model.
Fig. 5 is the equivalent circuit diagram of the embodiment shown in Fig. 4.
Fig. 6 is the simplified electrical circuit diagram of the equivalent circuit diagram shown in Fig. 5.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
Figure l is the structural representation of wireless electric energy transmission device of the present utility model, and Fig. 2 is the equivalent circuit diagram of the wireless electric energy transmission device shown in Fig. 1.From Fig. 1 and Fig. 2, can find out, wireless electric energy transmission device of the present utility model comprises having internal resistance R
shigh frequency electric source U
s, emitter and receiving system, emitter comprises having the first transmitting coil L
1, first transmitting capacitor C
1with the first transmitting resistance R
1the first resonance launching circuit, this first resonance launching circuit is a series resonance launching circuit, the first transmitting coil L
1for the air core coil of annular, this air core coil directly through being about 110 millimeters; Receiving system comprises having the first receiving coil L
3, first receive capacitor C
3with the first reception resistance R
3the first resonance receiving loop and there is the second receiving coil L
4, second receive capacitor C
4with the second reception resistance R
4the second resonance receiving loop, the first resonance receiving loop and the second resonance receiving loop are all series resonance receiving loop, the first receiving coil L
3with the second receiving coil L
4be all the air core coil of annular, the first receiving coil L
3directly through being about 110 millimeters, the second receiving coil L
4directly through being about 100 millimeters, wherein, the second receiving coil L
4be positioned at the first receiving coil L
3inside; In the present embodiment, high frequency electric source U
sby transformer B
1carry out Energy Coupling, transformer B with the first resonance launching circuit
1be positioned at the coil L of primary side
s1the number of turns be 8 circles, transformer B
1be positioned at the coil L of primary side
s2the number of turns be 1 circle; The wireless electric energy transmission device of the present embodiment also comprises having load resistance R
lload circuit, the first resonance receiving loop is by transformer B
3carry out Energy Coupling with load circuit, the second resonance receiving loop is by transformer B
4with load circuit with carry out Energy Coupling, transformer B
3the coil L of primary side
l1the number of turns be 1 circle, transformer B
3the coil L of primary side
l2the number of turns be 1 circle, transformer B
4the coil L of primary side
l3the number of turns be 1 circle, transformer B
4the coil L of primary side
l4the number of turns be 1 circle.
In the present embodiment, the first receiving coil L
3with the second receiving coil L
4between mutual inductance be M
34, the first transmitting coil L
1with the first receiving coil L
3between mutual inductance be M
13, the first transmitting coil L
1with the second receiving coil L
4between mutual inductance be M
14, wherein, the first receiving coil L
3with the second receiving coil L
4between coupling coefficient be about 0.82, the first transmitting coil L
1with the first receiving coil L
3with the second receiving coil L
4distance be all
d.
Fig. 3 shows the simplified electrical circuit diagram of the equivalent circuit diagram shown in Fig. 2.In Fig. 3, by high frequency electric source U
spower input part sub reflector to the first resonance launching circuit, be equivalent to add one to there is internal resistance R in the first resonance launching circuit
s1induced electromotive force U
s1; And will there is load resistance R
lload circuit reflex to respectively the first resonance receiving loop and the second resonance receiving loop, be equivalent to add respectively load R in the first resonance receiving loop and the second resonance receiving loop
l1and R
l2.
In the present embodiment, the operating current of establishing the first resonance launching circuit is I
1, the operating current of the first resonance receiving loop and the second resonance receiving loop is respectively I
3and I
4, U
s1=U
s0, R
1=R
3=R
4=R; L
11=L
33=L
44=L; M
13≈ M
34=M, R
l1=R
l2=R
l0, C
3=C
4=C
0, R
s1=R
s0,
，
，
Wherein, ω is angular frequency.
Utilize the equivalent electric circuit shown in Fig. 3, can obtain the radio transmission efficiency η of electric energy
1for:
The resonance receive frequency f of the first resonance receiving loop
33resonance receive frequency f with the second resonance receiving loop
44determined by formula below, that is:
The resonance receive frequency f of the first resonance launching circuit
11determined by formula below, that is:
As high frequency electric source U
soperating frequency fs=f
11=f
33=f
44time, can obtain maximum efficiency of transmission η from formula (1)
1m, that is:
And adopt existing technology, adopt single resonance launching circuit and single resonance receiving loop to carry out the resonance work of same frequency, remove the technical scheme that is prior art after the second resonance receiving loop with reference to the equivalent electric circuit shown in figure 3, from Fig. 3, remove after the second resonance receiving loop, with regard to the maximum transmitted efficiency eta of available prior art
0m, that is:
Wherein, the resonance receive frequency f of resonance receiving loop
20determined by following formula, that is:
Relatively formula (4) and formula (5), just can find out that the efficiency of transmission of the technical solution of the utility model increases significantly compared with prior art.
In addition, relatively formula (2) and formula (6), just can find out a great difference that is set with of the setting of resonance receive frequency of the resonance receiving loop of the utility model device and the resonance receive frequency of prior art.Easily finding out, is in the utility model device, to obtain best efficiency of transmission if adopt the setting scheme of the resonance receive frequency of prior art.
Fig. 4, Fig. 5 and Fig. 6 have shown another embodiment of wireless electric energy transmission device of the present utility model.From Fig. 4 to Fig. 6, can find out, the present embodiment is on the basis of first embodiment, to have increased by the second resonance launching circuit, and the second resonance launching circuit comprises the second transmitting coil L
2, second transmitting capacitor C
2with the second transmitting resistance R
2, the second resonance launching circuit is the same with the first resonance launching circuit is also series resonance launching circuit, the second transmitting coil L
2also be the air core coil of annular, this air core coil directly through being about 100 millimeters, wherein, the second transmitting coil L
2be positioned at the first transmitting coil L
1inside.
In the present embodiment, high frequency electric source U
sby transformer B
2carry out Energy Coupling, transformer B with the second resonance launching circuit
2be positioned at the coil L of primary side
s3the number of turns be 8 circles, transformer B
2be positioned at the coil L of primary side
s4the number of turns be 1 circle.
In the present embodiment, the first transmitting coil L
1with the second transmitting coil L
2between mutual inductance be M
12, the first transmitting coil L
1with the first receiving coil L
3between mutual inductance be M
13, the first transmitting coil L
1with the second receiving coil L
4between mutual inductance be M
14, the second transmitting coil L
2with the first receiving coil L
3between mutual inductance be M
23, the second transmitting coil L
2with the second receiving coil L
4between mutual inductance be M
24, the first receiving coil L
3with the second receiving coil L
4between mutual inductance be M
34, wherein, the first transmitting coil L
1with the second transmitting coil L
2between coupling coefficient be about 0.82, the first receiving coil L
3with the second receiving coil L
4between coupling coefficient be also about 0.82, the first transmitting coil L
1with the first receiving coil L
3with the second receiving coil L
4distance be all D, the second transmitting coil L
2with the first receiving coil L
3with the second receiving coil L
4distance be all also D.
In the present embodiment, the operating current of establishing the first resonance launching circuit and the second resonance launching circuit is respectively I
1and I
2, the operating current of the first resonance receiving loop and the second resonance receiving loop is respectively I
3and I
4; Make U
s1=U
s2=U
s0, R
s1=R
s2=R
s0, R
1=R
2=R
3=R
4=R, L
11=L
22=L
33=L
44=L, M
13≈ M
14≈ M
23≈ M
24=M, M
12≈ M
34=M
0, R
l1=R
l2=R
l0, C
1=C
2=C
3=C
4=C
0,
，
，
Utilize the equivalent electric circuit shown in Fig. 6, can obtain the radio transmission efficiency η of the electric energy of the present embodiment
2for:
The resonance receive frequency f of the first resonance launching circuit
11, the second resonance launching circuit resonance receive frequency f
22, the first resonance receiving loop resonance receive frequency f
33resonance receive frequency f with the second resonance receiving loop
44determined by formula below, that is:
As high frequency electric source U
soperating frequency fs=f
11=f
22=f
33=f
44time, from formula (7), can obtain the maximum efficiency of transmission η of the present embodiment
2m:
Relatively formula (9) and formula (5), just can find out that the efficiency of transmission of the present embodiment increases significantly compared with prior art.
In addition, relatively formula (8) and formula (6), easily can find out a great difference that is set with of the setting of two resonance receive frequencies of two resonance receiving loops of the present embodiment and the resonance receive frequency of prior art; Equally also can draw a great difference that is set with of the setting of two resonance tranmitting frequencies of two resonance launching circuits of the present embodiment and the resonance tranmitting frequency of prior art.In fact, adopt the resonance receive frequency of prior art or the setting scheme of resonance tranmitting frequency all cannot in the utility model device, obtain best efficiency of transmission.
In the present embodiment, under following parameter, carry out relevant mensuration: D and elected 35 millimeters as, R
lbe 10 ohm, L is 16.2 microhenrys, M
0be about 13.3 microhenrys, C
0be about 100 picofarads, high frequency electric source U
soperating frequency fs be 2.92 megahertzes, actual measurement obtain efficiency of transmission reach 84.2%.
Although shown and described and thought at present preferred embodiment of the present utility model, apparent, those skilled in the art can carry out various changes and improvements, and does not deviate from the scope of the present utility model that appended claims limits.
Claims (5)
1. a wireless electric energy transmission device, it is made up of high frequency electric source, emitter, receiving system and load, emitter and receiving system are configured at intervals electric energy transmitting wirelessly, it is characterized in that, emitter comprises having the first resonance launching circuit of the first transmitting coil and the first transmitting electric capacity and have the second transmitting coil and the second resonance launching circuit of the second transmitting electric capacity, and the coupling coefficient between the first transmitting coil and the second transmitting coil is greater than 0.5; Receiving system comprises that having the first receiving coil and first receives the first resonance receiving loop of electric capacity and have the second receiving coil and the second resonance receiving loop of the second reception electric capacity, and the coupling coefficient between the first receiving coil and the second receiving coil is greater than 0.5; High frequency electric source carries out Energy Coupling by the transformer with magnetic core and the first resonance launching circuit and the second resonance launching circuit; Load is carried out Energy Coupling by the transformer with magnetic core and the first resonance receiving loop and the second resonance receiving loop; The first resonance tranmitting frequency of the first resonance launching circuit of setting is f
11, the second resonance tranmitting frequency of the second resonance launching circuit of setting is f
22, the first resonance receive frequency of the first resonance receiving loop of setting is f
33, the second resonance receive frequency of the second resonance receiving loop of setting is f
44, the first resonance tranmitting frequency f
11, the second resonance tranmitting frequency f
22, the first resonance receive frequency f
33with the second resonance receive frequency f
44all identical with the operating frequency of high frequency electric source, and meet respectively following condition:
Wherein, L
11and C
11be respectively total self-induction and the total capacitance of the first resonance launching circuit, L
22and C
22be respectively total self-induction and the total capacitance of the second resonance launching circuit, L
33and C
33be respectively total self-induction and the total capacitance of the first resonance receiving loop, L
44and C
44be respectively total self-induction and the total capacitance of the second resonance receiving loop, M
12be the mutual inductance between the first transmitting coil and the second transmitting coil, M
34it is the mutual inductance between the first receiving coil and the second receiving coil.
2. wireless electric energy transmission device as claimed in claim 1, is characterized in that, the second receiving coil is positioned at the first receiving coil.
3. wireless electric energy transmission device as claimed in claim 1, is characterized in that, the first receiving coil and the second receiving coil are all identical closely-coupled receiving coils of Double-wire parallel wound mode two structures of making and size.
4. the wireless electric energy transmission device as described in one of claims 1 to 3, is characterized in that, the second transmitting coil is positioned at the first transmitting coil.
5. the wireless electric energy transmission device as described in one of claims 1 to 3, is characterized in that, the first receiving coil and the second receiving coil are all identical closely-coupled receiving coils of Double-wire parallel wound mode two structures of making and size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420184280.1U CN203871932U (en) | 2014-04-16 | 2014-04-16 | Wireless electric energy transmission apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420184280.1U CN203871932U (en) | 2014-04-16 | 2014-04-16 | Wireless electric energy transmission apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203871932U true CN203871932U (en) | 2014-10-08 |
Family
ID=51652854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420184280.1U Expired - Fee Related CN203871932U (en) | 2014-04-16 | 2014-04-16 | Wireless electric energy transmission apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203871932U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953723A (en) * | 2015-07-02 | 2015-09-30 | 中国科学院电工研究所 | Device for wireless power transmission |
| CN106571696A (en) * | 2016-06-01 | 2017-04-19 | 中兴新能源汽车有限责任公司 | Wireless charging system, charging transmitting device, charging receiving device and automobile |
| CN107771282A (en) * | 2015-06-22 | 2018-03-06 | 布利斯脱大学 | Wireless ultrasound wave sensor |
| CN107771282B (en) * | 2015-06-22 | 2024-04-19 | 布利斯脱大学 | Wireless ultrasonic sensor |
-
2014
- 2014-04-16 CN CN201420184280.1U patent/CN203871932U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107771282A (en) * | 2015-06-22 | 2018-03-06 | 布利斯脱大学 | Wireless ultrasound wave sensor |
| US20220011273A1 (en) * | 2015-06-22 | 2022-01-13 | The University Of Bristol | Wireless sensor |
| US11927568B2 (en) * | 2015-06-22 | 2024-03-12 | The University Of Bristol | Double inductance coils for powering wireless ultrasound transducers |
| CN107771282B (en) * | 2015-06-22 | 2024-04-19 | 布利斯脱大学 | Wireless ultrasonic sensor |
| CN104953723A (en) * | 2015-07-02 | 2015-09-30 | 中国科学院电工研究所 | Device for wireless power transmission |
| CN106571696A (en) * | 2016-06-01 | 2017-04-19 | 中兴新能源汽车有限责任公司 | Wireless charging system, charging transmitting device, charging receiving device and automobile |
| CN106571696B (en) * | 2016-06-01 | 2024-03-29 | 中兴新能源汽车有限责任公司 | Wireless charging system, charging transmitting device, charging receiving device and automobile |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20150416 |
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| EXPY | Termination of patent right or utility model |