CN103944284A - Achieving method of magnetic resonance coupling wireless power transmission system - Google Patents
Achieving method of magnetic resonance coupling wireless power transmission system Download PDFInfo
- Publication number
- CN103944284A CN103944284A CN201410180860.8A CN201410180860A CN103944284A CN 103944284 A CN103944284 A CN 103944284A CN 201410180860 A CN201410180860 A CN 201410180860A CN 103944284 A CN103944284 A CN 103944284A
- Authority
- CN
- China
- Prior art keywords
- frequency
- transmission system
- magnetic resonance
- resonance coupling
- power transmission
- 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.)
- Pending
Links
Abstract
The invention discloses an achieving method of a magnetic resonance coupling wireless power transmission system. The magnetic resonance coupling wireless power transmission system comprises a high-frequency diving power supply portion, a transmitting portion and a receiving portion, wherein the high-frequency diving power supply portion drives a high-frequency signal generating source and a power amplifier to produce high-frequency and high-power sine wave. The transmitting portion transmits magnetic waves through a transmitting coil. The receiving portion receives magnetic field energy through a receiving coil, produces constant-voltage output through rectification filter and acts on a load. By adopting the achieving method of the magnetic resonance coupling wireless power transmission system, the shortcomings including easy contact spark production, poor device moving flexibility, poor appearance and the like brought by a wired power transmission mode can be overcome, and therefore the achieving method has important application value and wide application prospect in the fields of military, aerospace and the like. The wireless power transmission is achieved, and people can widely and flexibly apply electric power.
Description
Technical field
The present invention relates to USB fan technical field, relate in particular to the implementation method of magnetic resonance coupling radio energy transmission system.
Background technology
Wireless power transmission technology refers to by the method for non-contacting mode electric energy transmitting.Existing wireless energy transmission technology mainly contains: induction coupling technique, magnetic coupling harmonic technology, radiotechnology based on microwave or light wave.
Wherein, magnetic resonance has been coupled wireless power transmission technology set multi-disciplinary basic theory and the application technologies such as electromagnetic field, coupled mode theory, high-frequency power electronic, electromagnetic coupling theory, be that domestic and international academia and industrial quarters start a frontier of exploring, belong to the advanced subject in power delivery field in the world.
Magnetic resonance coupling wireless power transmission technology is to be proposed by professor Soljacic of Massachusetts Institute Technology.Be different from the radiation loss in far field, it belongs to the harmless non-radiative resonance coupling near field, decays to some extent, in theory although the resonance between transmitting terminal and receiving terminal is coupled with the increase of both distances, the energy not absorbed by load can return to transmitting terminal, thereby can be too not large to effectiveness affects.Because resonant wavelength is far longer than resonator dimensions, so near object is limited on its impact, and also very weak owing to interacting between magnetic field and organism, so be comparatively safe to organism.
This technology inherited can the electromagnetic wave type of long-distance transmissions and the induction wireless power transmission technological merit of short range transmission in, overcome again its deficiency:
(1) transmission range aspect: farthest, induction transmission range is the shortest for electromagnetic wave type transmission range, magnet coupled resonant type transmission range, between between the above two, is ensureing the high efficiency while, breaks through induction centimetre, millimeter grade restriction;
(2) efficiency of transmission and power aspect: electromagnetic wave type because of the serious efficiency of long-distance transmissions loss in air lower, corresponding through-put power is also relatively low; Induction at milli, li level is higher; And magnet coupled resonant type efficiency of transmission more slightly lower than induction, power is watt to hectowatt grade, even higher.
(3) to surrounding environment influence: the electromagenetic wave radiation producing when powerful electromagnetic wave type wireless power transmission, can produce considerable influence to surrounding environment; The loose coupling of an induction approximate transformer, less to surrounding environment influence; Magnet coupled resonant type is a kind of non-radiation type magnetic coupling, in near-field region, only the object matching with its resonance frequency is produced to close coupling effect, and the impact of the object of off-resonance frequency is very weak.
The further investigation of magnetic resonance coupling wireless power transmission mechanism has important theory directive significance to this technology from now in the application of every field.Because this technology is higher than microwave wireless electric energy transmission technology efficiency, than induction coupling wireless power transmission technical transmission distance, so compared to other two technology, this technology has more Research Significance and practical value.
Magnetic resonance coupling wireless power transmission technology is to be proposed by professor Soljacic of Massachusetts Institute Technology.In November, 2006, the researcher of america's MIT has proposed wireless power transmission technology that can middle distance transmission, and has carried out by experiment subsequently having verified the efficiency of transmission with 40%, has lighted 60 w bulbs outward more than two meters.Its theoretical foundation is: if two oscillating circuits have identical resonance frequency, be coupled so in wave-length coverage by near field evanescent wave.The standing wave that inductor produces, being far smaller than in the loss time, allows energy efficient ground to be transferred to another object from an object.Be different from the radiation loss in far field, it belongs to the harmless non-radiative resonance coupling near field, decays to some extent, in theory although the resonance between transmitting terminal and receiving terminal is coupled with the increase of both distances, the energy not absorbed by load can return to transmitting terminal, thereby can be too not large to effectiveness affects.
Magnet coupled resonant type wireless delivery of electrical energy utilizes resonance principle, make it in the time that moderate distance (transmission range is generally several times of transmission coil diameter) is transmitted, still can obtain higher efficiency and larger power, and delivery of electrical energy is not subject to the impact of the non magnetic barrier in space.Than induction type, the method transmission range is far away; Than radiant type, its impact on electromagnetic environment is less, and power is larger.Just because of these advantages, it is more and more studied.Existing document carries out overall general introduction to wireless power transmission technology both at home and abroad at present, and some colleges and universities and research department have also carried out the research work of induction type and resonant mode wireless power transmission in succession both at home and abroad, have obtained significant achievement.
Transmit level is specifically reflected as through-put power, transmission range and efficiency of transmission, closely related with system resonance frequency.About the selection of system resonance frequency, a lot of research is used 13.56MHz frequencies, ensures that system works allows frequency range in industrial scientific research infirmary.And other Study system frequency from 90.79kH to 80MHz not etc.On the whole in higher frequency range.
Although magnet coupled resonant type wireless electric energy transmission technology has been obtained considerable progress, still have at present many problems to wait to solve.Main manifestations is following several aspect:
(1) in theory, for this technology, systematic analysis and design method is not intactly proposed, and the parameters such as resonance frequency, inductance value, the capacitance not theory of a sleeve forming are selected design.The sensitivity analysis of system parameters also could not effectively be carried out.System is very responsive to frequency change, and in the time that certain a part of parameter in this system changes, the situation of change of the transmission characteristic of system, and how to proofread and correct, deep research do not obtained.
(2) apply relevant problem to the technical research of coupled resonance formula wireless power transmission, as interference problem of the selection of the making of high efficiency high frequency emission source, coil, impedance matching, constant voltage output, capacitance compensation, conduction/magnetic conduction substance etc., all also could not be solved effectively.
(3) contacting closely problem with practical application has to be solvedly, how technology is applied to actual needs experimental study.
(4) how to the extent of injury of human body how high frequency strong magnetic field, and evade possible harm, still could not reach so far common recognition.
Due to friction, the problem such as aging, in delivery of electrical energy process, be easy to produce spark, and then have influence on life-span and the Electrical Safety of power consumption equipment.In addition, traditional wired electric power transfer mode can not meet the needs of some particular application, as mine and water medium.Along with the development of human social economy, various electronic equipments have obtained using widely, but too many electric wire and socket made troubles to people's life.Also there is very large inconvenience in the long-term power supply of the Medical Devices that implant in addition.
Summary of the invention
In order to solve the problem by electric life and Electrical Safety, the present invention has designed the implementation method of magnetic resonance coupling radio energy transmission system.
The implementation method of magnetic resonance coupling radio energy transmission system provided by the invention, its transmission system comprises: high-frequency drive power unit, radiating portion, receiving unit, wherein said high-frequency drive power unit, drives high-frequency signal that source occurs and power amplifier produces high frequency, high-power sine wave; Described radiating portion, by transmitting coil emitting electromagnetic wave, is provided with building-out capacitor between described high-frequency drive power unit and described radiating portion; Described receiving unit, receiving coil is accepted magnetic field energy, through rectifying and wave-filtering, produces constant voltage output, acts on load; Between described receiving unit and load, be provided with building-out capacitor.
Described high-frequency drive power unit, the DC power supply being produced through rectifying and wave-filtering by 220V/50HZ civil power, carries out rectifying and wave-filtering and high-frequency inversion module is carried out high-frequency inversion by rectification filtering module, obtains at least high-voltage dc power supply of 100V.
Described radiating portion, its transmitting coil adopts the mode of silver jacketed wire spaced winding, and drum stand adopts the nonmagnetic substance of lightweight, and the coil loss that coiling goes out is low, and quality factor are high, can reach self-resonant frequency more than MHZ, ensured the power efficiency of transmission.
Described receiving unit, adopt the receiving coil of the mode coiling of silver jacketed wire spaced winding, there is the self-resonant frequency identical with described transmitting coil, because self-resonant frequency is identical, under specific high frequency, can reach resonance condition, due to the harmless non-radiative resonance coupling near field, accept side magnetic field energy is received efficiently; Output current, through rectifying and wave-filtering and voltage stabilizing circuit, makes to be output as constant voltage output, acts on load.
The beneficial effect that the technical scheme of the embodiment of the present invention is brought is as follows:
The implementation method of magnetic resonance coupling radio energy transmission system disclosed by the invention, can overcome many deficiencies that wired power transmission mode exists: easily produce contact sparking, equipment moving very flexible, aesthetic property etc., therefore there is important using value and application prospect widely at numerous areas such as military affairs, Aero-Space.Realize wireless power transmission, will make mankind's the electric power broader, more flexible.
Can realize the magnet coupled resonant type wireless electric energy transmission technology of intermediate range higher power transmission, due to its technical characterstic and advantage, can be widely used in the many aspects such as wireless senser, phosphorescence illuminating lamp, effectively solve because adopting powered battery to limit the problem in useful life.And present stage magnet coupled resonant type wireless electric energy transmission system research be mostly theory analysis and experiment, there is no really can apply to actual system.Therefore, work out can supporting phosphorescence illuminating lamp etc. this type of radio energy transmission system of multiple actual product, have great importance.
Brief description of the drawings
For the technical scheme of the clearer explanation embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparent, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The magnetic resonance coupling radio energy transmission system schematic diagram that Fig. 1 provides for the embodiment of the present invention.
Fig. 2 is high-frequency circuit.
Fig. 3 is regulator rectifier circuit.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention; technical scheme in the embodiment of the present invention is carried out to clear, complete description; obvious described embodiment is only a part of embodiment of the present invention; not whole embodiment; based on the embodiment in the present invention; those of ordinary skill in the art, not paying the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment
As Figure 1-3, the implementation method of magnetic resonance coupling radio energy transmission system provided by the invention, its transmission system comprises: high-frequency drive power unit, radiating portion, receiving unit, wherein
Described high-frequency drive power unit, drives high-frequency signal that source occurs and power amplifier produces high frequency, high-power sine wave;
Described radiating portion, by transmitting coil emitting electromagnetic wave;
Described receiving unit, receiving coil is accepted magnetic field energy, through rectifying and wave-filtering, produces constant voltage output, acts on load.
Described high-frequency drive power unit, the DC power supply being produced through rectifying and wave-filtering by 220V/50HZ civil power, carries out rectifying and wave-filtering and high-frequency inversion module is carried out high-frequency inversion by rectification filtering module, obtains at least high-voltage dc power supply of 100V.
Described radiating portion, its transmitting coil adopts the mode of silver jacketed wire spaced winding, and drum stand adopts the nonmagnetic substance of lightweight, and the coil loss that coiling goes out is low, and quality factor are high, can reach self-resonant frequency more than MHZ, ensured the power efficiency of transmission.
Described receiving unit, adopt the receiving coil of the mode coiling of silver jacketed wire spaced winding, there is the self-resonant frequency identical with described transmitting coil, because self-resonant frequency is identical, under specific high frequency, can reach resonance condition, due to the harmless non-radiative resonance coupling near field, accept side magnetic field energy is received efficiently; Output current, through rectifying and wave-filtering and voltage stabilizing circuit, makes to be output as constant voltage output, acts on load.
For avoiding the impact on magnetic field transmission, the nonmagnetic substances such as the framework choice for use ABS plastic of coil have alleviated the quality of equipment simultaneously; Coiling wire adopts wire diameter 2mm multiply silver jacketed wire, can effectively reduce kelvin effect etc., and the loss that reduces Coil resistance and cause regulates inductance capacitance simultaneously.
Coil adopts different windings, and its distributed inductance is different with electric capacity, thereby self-resonant frequency etc. is also not quite similar.Design coil has adopted the method for spaced winding, thereby by regulating its distributed inductance electric capacity, makes coil self-resonant frequency reach 10MHZ left and right, mates with resonator.
Through experiment and actual demand analysis, select coil diameter 30 cm, coil turn is 5 circles.The actual Q value that uses is higher, and the stary capacity of coil is less, and self-inductance is reasonable, can reach higher through-put power and efficiency.
Radio energy transmission system carrys out transmitting energy based on coupling electromagnetic induction, has larger leakage inductance, and transmission system active power is reduced.For reducing leakage inductance, improve active power, reduce reactive power, should reduce as far as possible coil self inductance, adopt capacitance compensation simultaneously.After compensation still there is resonance in loop, and power output and system efficiency of transmission improve.
The self-induction of coil reduces by reducing the mode such as coil turn and coil diameter.For avoiding power circuit and load circuit parameter influence, the coil resonance frequency causing is not mated, and the building-out capacitor of primary side adopts variable capacitance, and the resonance frequency of adjustable coil is predetermined value.
Because the required frequency of designed system is higher, therefore need to consider impact and cancellation scheme that kelvin effect under high frequency state and proximity effect are brought.
Kelvin effect and proximity effect coexist, and frequency is higher, and both are more obvious.Kelvin effect mainly concentrates near conductive surface electric current, and proximity effect make electric current concentrate be distributed in the relative inner side of electric conductor, two-phase adjacent band, under high frequency, both can make circuit equivalent resistance significantly improve.
The method that reduces kelvin effect and proximity effect in design is mainly: adopt the stranded silver-jacketed wire of multiply fine rule, can effectively improve the actual conducting sectional area of actual wire; Winding mode adopts spaced winding, can effectively avoid skin and coupling effect between line.After tested, take above two measures after coil resistance decline to a great extent, simultaneously distributed capacitance is also improved.
The beneficial effect that the technical scheme of the embodiment of the present invention is brought is as follows:
The implementation method of magnetic resonance coupling radio energy transmission system disclosed by the invention, can overcome many deficiencies that wired power transmission mode exists: easily produce contact sparking, equipment moving very flexible, aesthetic property etc., therefore there is important using value and application prospect widely at numerous areas such as military affairs, Aero-Space.Realize wireless power transmission, will make mankind's the electric power broader, more flexible.
Can realize the magnet coupled resonant type wireless electric energy transmission technology of intermediate range higher power transmission, due to its technical characterstic and advantage, can be widely used in the many aspects such as wireless senser, phosphorescence illuminating lamp, effectively solve because adopting powered battery to limit the problem in useful life.And present stage magnet coupled resonant type wireless electric energy transmission system research be mostly theory analysis and experiment, there is no really can apply to actual system.Therefore, work out can supporting phosphorescence illuminating lamp etc. this type of radio energy transmission system of multiple actual product, have great importance.
The above, be only specific embodiments of the invention, but feature of the present invention is not limited to this, and any people who is familiar with this technology is in field of the present invention, and the variation that can expect easily or modification, all should be encompassed in following claim of the present invention.
Claims (4)
1. the implementation method of magnetic resonance coupling radio energy transmission system, its transmission system comprises: high-frequency drive power unit, radiating portion, receiving unit, wherein said high-frequency drive power unit, drives high-frequency signal that source occurs and power amplifier produces high frequency, high-power sine wave; Described radiating portion, by transmitting coil emitting electromagnetic wave; Described receiving unit, receiving coil is accepted magnetic field energy, through rectifying and wave-filtering, produces constant voltage output, acts on load.
2. the implementation method of magnetic resonance coupling radio energy transmission system as claimed in claim 1, it is characterized in that, described high-frequency drive power unit, the DC power supply being produced through rectifying and wave-filtering by 220V/50HZ civil power, carry out rectifying and wave-filtering and high-frequency inversion module is carried out high-frequency inversion by rectification filtering module, obtain at least high-voltage dc power supply of 100V.
3. the implementation method of magnetic resonance coupling radio energy transmission system as claimed in claim 1, is characterized in that, described radiating portion, and its transmitting coil adopts the mode of silver jacketed wire spaced winding, and drum stand adopts the nonmagnetic substance of lightweight.
4. the implementation method of magnetic resonance coupling radio energy transmission system as claimed in claim 3, is characterized in that, described receiving unit, and the receiving coil of the mode coiling of employing silver jacketed wire spaced winding, has the self-resonant frequency identical with described transmitting coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410180860.8A CN103944284A (en) | 2014-04-30 | 2014-04-30 | Achieving method of magnetic resonance coupling wireless power transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410180860.8A CN103944284A (en) | 2014-04-30 | 2014-04-30 | Achieving method of magnetic resonance coupling wireless power transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103944284A true CN103944284A (en) | 2014-07-23 |
Family
ID=51191825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410180860.8A Pending CN103944284A (en) | 2014-04-30 | 2014-04-30 | Achieving method of magnetic resonance coupling wireless power transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103944284A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362774A (en) * | 2014-11-28 | 2015-02-18 | 中南大学 | Magnetic coupling resonant wireless power transmission system for mine hoisting container |
| CN105742043A (en) * | 2014-12-31 | 2016-07-06 | 三星电机株式会社 | Power transmitting coil structure and wireless power transmitting apparatus including the same |
| CN106304451A (en) * | 2016-09-23 | 2017-01-04 | 中惠创智无线供电技术有限公司 | A kind of wireless power heating system |
| CN107492957A (en) * | 2017-07-17 | 2017-12-19 | 深圳市无源技术有限公司 | A kind of letter energy simultaneous interpretation system and method for merging short distance energy transmission technology |
| CN108072454A (en) * | 2016-11-17 | 2018-05-25 | 中国电力科学研究院 | The anti-interference temp measuring system of solid loop-net cabinet based on magnetic coupling resonance power supply mode |
| CN108469554A (en) * | 2018-03-20 | 2018-08-31 | 钱柏霖 | A kind of passive closed environment index detection system and method |
| CN112890349A (en) * | 2019-12-03 | 2021-06-04 | 军事科学院系统工程研究院军事新能源技术研究所 | Wearing suit capable of supplying power wirelessly in real time |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101233666A (en) * | 2005-07-30 | 2008-07-30 | Ls电线有限公司 | Rechargeable power supply, battery device, contact-less charger systems and method for charging rechargeable battery cell |
| WO2010116441A1 (en) * | 2009-03-30 | 2010-10-14 | 富士通株式会社 | Wireless power supply system, wireless power transmission device, and wireless power receiving device |
| CN203261131U (en) * | 2013-05-08 | 2013-10-30 | 桂林电子科技大学 | Wireless power transmission device based on electromagnetic coupling resonance |
-
2014
- 2014-04-30 CN CN201410180860.8A patent/CN103944284A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101233666A (en) * | 2005-07-30 | 2008-07-30 | Ls电线有限公司 | Rechargeable power supply, battery device, contact-less charger systems and method for charging rechargeable battery cell |
| WO2010116441A1 (en) * | 2009-03-30 | 2010-10-14 | 富士通株式会社 | Wireless power supply system, wireless power transmission device, and wireless power receiving device |
| CN203261131U (en) * | 2013-05-08 | 2013-10-30 | 桂林电子科技大学 | Wireless power transmission device based on electromagnetic coupling resonance |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362774A (en) * | 2014-11-28 | 2015-02-18 | 中南大学 | Magnetic coupling resonant wireless power transmission system for mine hoisting container |
| CN105742043A (en) * | 2014-12-31 | 2016-07-06 | 三星电机株式会社 | Power transmitting coil structure and wireless power transmitting apparatus including the same |
| CN106304451A (en) * | 2016-09-23 | 2017-01-04 | 中惠创智无线供电技术有限公司 | A kind of wireless power heating system |
| CN108072454A (en) * | 2016-11-17 | 2018-05-25 | 中国电力科学研究院 | The anti-interference temp measuring system of solid loop-net cabinet based on magnetic coupling resonance power supply mode |
| CN107492957A (en) * | 2017-07-17 | 2017-12-19 | 深圳市无源技术有限公司 | A kind of letter energy simultaneous interpretation system and method for merging short distance energy transmission technology |
| CN107492957B (en) * | 2017-07-17 | 2020-09-29 | 深圳市南科源创技术有限公司 | Information and energy simultaneous transmission system and method integrating short-distance energy transmission technology |
| CN108469554A (en) * | 2018-03-20 | 2018-08-31 | 钱柏霖 | A kind of passive closed environment index detection system and method |
| CN112890349A (en) * | 2019-12-03 | 2021-06-04 | 军事科学院系统工程研究院军事新能源技术研究所 | Wearing suit capable of supplying power wirelessly in real time |
| CN112890349B (en) * | 2019-12-03 | 2022-11-18 | 军事科学院系统工程研究院军事新能源技术研究所 | Wearing suit capable of supplying power wirelessly in real time |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103944284A (en) | Achieving method of magnetic resonance coupling wireless power transmission system | |
| US10243411B2 (en) | Wireless charger with uniform H-field generator and EMI reduction | |
| CN202513644U (en) | Portable system capable of achieving wireless charging | |
| CN103986245A (en) | Wireless electric energy transmission system and method based on double-layer two-way spiral coils | |
| CN205004794U (en) | Magnetic coupling wireless power transmission charging device | |
| CN103414261A (en) | Variable-coupling coefficient magnetic resonance wireless power transmission system and method | |
| CN103915907B (en) | Principal and subordinate is from coupling magnetic resonance wireless electric energy transmission device and method of operating thereof | |
| CN104979914B (en) | A kind of field coupling formula radio energy transmission system | |
| CN104333101A (en) | On-line electric automobile power supply system based on wireless power transmission technique | |
| CN103545940A (en) | Asymmetrical on-line wireless power supply coupler | |
| CN103683529A (en) | Load impedance matching method used for induction coupling wireless electric energy transmission efficiency optimization | |
| CN103928991B (en) | Magnetic resonance wireless electric energy transmission device based on PCB resonance coupling coil structures | |
| CN203747470U (en) | Shield-based enclosed wireless charging device | |
| Santalunai et al. | An increasing the power transmission efficiency of flat spiral coils by using ferrite materials for wireless power transfer applications | |
| CN104953724A (en) | Wireless power transmission device and toy rail car | |
| CN106410984A (en) | Mid-range magnetic resonance wireless energy transfer system | |
| CN107040050A (en) | A kind of wireless electric energy transmission device and transmission method | |
| CN204517512U (en) | The resonant wireless power transmission earphone of magnetic coupling | |
| CN103915916A (en) | Magnetic resonance wireless electric energy transmitting device based on planar magnetic resonant coupling coil structure | |
| CN108199428A (en) | A kind of control method of wireless charging device | |
| CN103312052B (en) | A kind of antenna assembly for wireless power supply system | |
| KR20130028447A (en) | A wireless power realy apparatus and transmission system | |
| CN205595907U (en) | Transformer and power strip | |
| CN102553251A (en) | Design of intelligent tracking electric toy car based on non-contact power transmission technology | |
| CN203368155U (en) | Antenna apparatus for wireless power supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140723 |