CN206452186U - A kind of system for improving wireless power transmission efficiency - Google Patents
A kind of system for improving wireless power transmission efficiency Download PDFInfo
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- CN206452186U CN206452186U CN201621489497.9U CN201621489497U CN206452186U CN 206452186 U CN206452186 U CN 206452186U CN 201621489497 U CN201621489497 U CN 201621489497U CN 206452186 U CN206452186 U CN 206452186U
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- wireless power
- power transmission
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Abstract
The utility model is related to electric energy transmission technology field, especially a kind of system for improving wireless power transmission efficiency, including microprocessor, emitter follower, A/D converter, precise rectification circuit, current rectification circuit, receiving terminal and several transmitting output stages, microprocessor passes through each transmitting output stage of emitter follower connection, transmitting output stage connects receiving terminal and current detection circuit respectively, current detection circuit connects A/D converter, A/D converter connection microprocessor by precise rectification circuit.The utility model beneficial effect：Wireless power transmission is carried out from electromagentic resonance principle；Analyzing influence wireless power transmission efficiency, transimission power, the factor of transmission range, design multiple transmitting output stages, using microprocessor as control core, the size of relatively more each transmitting output stage supply current, so as to export the pulse signal of certain frequency from a certain output end, control a transmitting output stage individually to power with this, improve power utilization rate, improve efficiency of transmission.
Description
Technical field
The utility model is related to electric energy transmission technology field, especially it is a kind of improve wireless power transmission efficiency be
System.
Background technology
At present, the electronic equipment such as desk lamp, mobile phone, notebook computer carries out electricity consumption or charging, mainly uses one end company
Connect the traditional approach of AC power, other end connection electronic equipment or electronic equipment rechargeable battery.With the increase of electrical equipment,
Electric wire and socket are also largely manufactured and used therewith, are caused the consumption of big quantity of material and the energy, are caused environmental pollution；Frequently insert
Pull out and be easy to damage joint, it is also possible to bring the danger of electric shock；You are when house fitting-up or architectural design is carried out simultaneously, always
Cable reserved location is for, attractive in appearance and environmental protection is influenceed.Due to the active demand in market, with silicon technology, electronic technology, control
Technology is advanced by leaps and bounds, and increasing scholar sets foot in the research of wireless power transmission technology, also achieve many achievements, such as existing
There are " No-tail TV " in technology, various wireless chargers on the market etc..But pass through investigation, current wireless power transmission equipment
Efficiency of transmission, transimission power, transmission range need further raising.
Wireless power transmission is a kind of without any connection physically, and electric energy just can be contactlessly transferred to load
Electric energy transmission means.At present, electric power Radio Transmission Technology mainly has four kinds：Electromagnetic induction type, electric wave acceptance type, light
Thermocouple mould assembly and magnetic resonance type.
Electromagnetic induction type is to produce magnetic force by coil using electric current to realize that short-range wireless is powered, it is desirable to have high magnetic permeability
Magnetic core can be diffused to seriously in air as medium, the otherwise magnetic line of force, cause transmission efficiency to decline, especially remote in two coils
When, decline it is very severe；The problems such as heating, electromagnetism involve high frequency waves occurs when foreign matter is invaded.
Photoelectric coupling type is that electric energy is converted into luminous energy, and transferring energy to destination by light is then converted to electric energy, this
Plant wireless power Technical comparing directly perceived, and photoelectric conversion technique is also widely used relatively, but the bang path of light is with scarce
Fall into, be exactly there can not be barrier in bang path, the influence to humans and animals particularly eyes is also larger, so this technology
It is to have very big applied defect.
Electric wave acceptance type is to convert electric energy to electric wave to carry out wireless power, and the wireless power of electric wave has to be penetrated well
Property, long transmission distance and is influenceed smaller by barrier, the features such as being reflected in metal surface, but electric wave acceptance type transimission power can only
In several milliwatts between 100 milliwatts, and large effect, the particularly influence to humans and animals may be produced to environment.
Electromagentic resonance type is that the coil of transmitting terminal and receiving terminal is calibrated for into a magnetic resonance system, as shown in figure 1, wherein
D represents the distance between dispatch coil, and M represents the mutual inductance between dispatch coil, and its model such as resonance shakes coupling model table
It is shown as：
, only work as ZS=RS, and have ZD=RD+RWWhen, LSWith LDSelf-resonance can occur simultaneously for coil, electric energy transmission now
Efficiency eta is highest, and expression formula is：
When transmitting terminal is powered, it can't outwards launch electromagnetic wave, and a non-radiative magnetic is simply formed around
, this magnetic field is used for and receiving terminal contact, excites the resonance of receiving terminal.Resonance is a kind of very efficient transmission energy side
Formula, and according to the characteristic of resonance, energy transmission is carried out inside such a resonator system, to this resonator system it
Outer object will not produce any influence.Electromagentic resonance type not only supports the dislocation of transmitting coil and receiving coil horizontal direction,
Also the problems such as heating, electromagnetism involve high frequency waves, and and electromagnetism will not occur when foreign matter is invaded as induction
Induction mode is different, and resonance mode can reduce the weight and cost of product without using ferrite and Ritz coil.Electromagnetism is total to
The distance of vibration shape wireless power transmission is also remote compared with electromagnetic induction type, analyzes, currently without under more advanced scheme, adopts more than
It is a kind of optimal selection that wireless power transmission is carried out with electromagentic resonance.
In electromagentic resonance type wireless power transmission, the primary and secondary coil coefficient of coup influences very big to efficiency of transmission, first, secondary
The coefficient of coup of level is relevant with core material, the winding (line footpath, the number of turn, position) of coil and the size of air gap.
The selection principle of core material is：1. high magnetic conductivity, under certain magnetic field intensity H, magnetic induction density B it is big
The small size (B=μ H) depending on magnetic permeability μ；2. there are the coercivity H and residual magnetic flux density Br of very little, material is rectified
Stupid power is smaller, means that magnetization and demagnetization are easy, hysteresis curve is narrow, and magnetic hystersis loss is just smaller in alternating magnetic field；3. resistance
Rate is high, and the magnetic core worked in the magnetic field of alternation has eddy-current loss, and the loss of resistivity high-eddy is small；4. there is high saturation
Magnetic induction density B s, saturation induction density is high, and identical magnetic flux needs less core cross section product, the volume of magnetic element
It is small.
By experimental verification, in order to avoid eddy current loss, resonant frequency stability and coupling efficiency, the skeleton of coil are improved
With non-ferrite materials such as high frequency magnetic drum framves, the internal diameter of skeleton is 66mm, with 36 gangs of Φ 0.1mm enamel-covered wire spider net type winding
Air gap between 11 circles, primary and secondary is the smaller the better.And it is found through experiments that, square coil is the relatively effective knot of stable coupling
Structure.
In wireless power transmission technology, the power and efficiency that transmitting output stage is transmitted to electric energy play vital work
With first passing through experiment test and launch output-stage circuit as shown in Figure 2.The C2 of emitting portion and the C5 of receiving portion use 4700PF
Electric capacity, make two resonant tank resonance on a same frequency, according to electromagentic resonance principle carry out wireless power transmission.ICBT is managed
Exciting power is not consumed in principle[, in order to reduce the loss of output stage, output stage is managed with IGBT.Put up and connected after circuit by Fig. 2
Power supply, the square wave of 512KHZ, a 5V is inputted from input, what receiving coil LD is almost reacted close to LS without, only
Cut off after SW, disconnecting consumers resistance R3, R4, LED has just just lighted, and measures UOVoltage only have 3V or so, VT1 drain currents are
100mA, efficiency is：
From the point of view of voltage waveform, distortion is suitable big, and the amplitude very little of waveform.Try the ripple of increase grid first
Width, this is easier, and input is increased to 7V from 5V, and at this moment drain current also increases therewith arrives 200mA.Receiving terminal is plus load
Afterwards, U0Voltage only have 2V or so, corresponding VT1 waveform.
There is larger improvement plus drain voltage waveform after load, grid voltage waveform but remains unchanged.Power and efficiency
The reason for not increasing actually whereIt is primarily due to power tube and does not operate on off state, and causes the root of such case
This reason is between the gate-to-source of VMOS FETs there is very big interelectrode capacity between Drain-Source, and CGS is typically about
Hundreds of to thousands of pF, CDS typically about hundreds of pF, and the output current very little of CMOS gate circuits, make the rise time of waveform with
Anaplasia is big during drop, causes efficiency to decline.
Therefore, it is necessary to propose a kind of system for improving wireless power transmission efficiency for above mentioned problem.
Utility model content
The utility model purpose is to overcome deficiency of the prior art to improve wireless power transmission effect there is provided one kind
The system of rate.
In order to solve the above-mentioned technical problem, the utility model is to be achieved through the following technical solutions：
A kind of system for improving wireless power transmission efficiency, including microprocessor, emitter follower, A/D converters,
Precise rectification circuit, current rectification circuit, receiving terminal and several transmitting output stages, the microprocessor pass through emitter follower
The each transmitting output stage of connection, the transmitting output stage connects receiving terminal and current detection circuit, the current detecting electricity respectively
Road connects A/D converter by precise rectification circuit, and the A/D converter connects microprocessor, and the receiving terminal includes receiving
Circuit, rectification circuit and load, the receiving circuit are connected by rectification circuit and loaded.
Preferably, it is described transmitting output stage include transmitting output circuit, the transmitting output circuit include transmitting coil and
Receiving coil, wireless connection between the receiving coil and transmitting coil, the two ends of the transmitting coil are connected with the second electric capacity,
One end of the transmitting coil passes through the 3rd electric capacity and the 4th capacity earth respectively.
Preferably, the other end of the transmitting coil accesses the drain electrode of VMOS FETs, the VMOS FETs
Source ground, the grid of the VMOS FETs is respectively connected to the transmitting of the 3rd triode of one end and access of the 5th resistance
Pole, the other end of the 5th resistance and the colelctor electrode of the 3rd triode are grounded, the emitter stage access of the 3rd triode
The emitter stage of second triode.
Preferably, the base stage of the 3rd triode accesses the base stage of the second triode, the base stage of second triode
First resistor and the first electric capacity are connected respectively, and the colelctor electrode of second triode is connect by the 9th electric capacity and the 8th electric capacity respectively
Ground.
Preferably, the two ends of the receiving coil are connected with the 5th electric capacity, the two ends difference connecting bridge of the 5th electric capacity
The a ends and b ends of formula diode, distinguish the 6th electric capacity in parallel and the 7th electric capacity between the c ends and d ends of the bridge diode.
Preferably, second resistance and light emitting diode, the second resistance are in series between the two ends of the 7th electric capacity
By switch, connection 3rd resistor and one end of the 4th resistance are that the other end of the light emitting diode connects respectively respectively for one end
Connect the other end of 3rd resistor and the 4th resistance.
Preferably, the bridge diode is by the first diode, the second diode, the 3rd diode and the 4th diode string
Connect composition.
The utility model beneficial effect：The utility model carries out wireless power transmission from electromagentic resonance principle；Analyze shadow
Wireless power transmission efficiency, transimission power, the factor of transmission range are rung, design improves interlock circuit；The multiple transmitting outputs of design
Level, using microprocessor as control core, runs the program of setting, relatively more each size for launching output stage supply current, so that from
A certain output end exports the pulse signal of certain frequency, with this which controls launch output stage and individually powers, improve power supply
Utilization rate, improves efficiency of transmission, with very strong practicality.
The technique effect of design of the present utility model, concrete structure and generation is made furtherly below with reference to accompanying drawing
It is bright, to be fully understood from the purpose of this utility model, feature and effect.
Brief description of the drawings
Fig. 1 is the resonance coupling model figure of prior art；
Fig. 2 is prior art transmitting output circuit figure；
Fig. 3 is the utility model system construction drawing；
Fig. 4 is the transmitting output circuit figure of the utility model embodiment；
Fig. 5 is the load automatic detection circuit block diagram of the utility model embodiment；
Fig. 6-9 is the compensation way topology diagram of the utility model embodiment.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing, but the utility model can be by right
It is required that the multitude of different ways for limiting and covering is implemented.
Such as Fig. 3 and with reference to shown in Fig. 4 to Fig. 9, a kind of system for improving wireless power transmission efficiency, including microprocessor
Device, emitter follower, A/D converter, precise rectification circuit, current rectification circuit, receiving terminal and several transmitting output stages, institute
Microprocessor is stated by each transmitting output stage of emitter follower connection, the transmitting output stage connects receiving terminal and electric current respectively
Circuit is detected, the current detection circuit connects A/D converter by precise rectification circuit, and the A/D converter connects micro- place
Device is managed, the receiving terminal includes receiving circuit, rectification circuit and load, and the receiving circuit is connected by rectification circuit and loaded.
As shown in figure 3, transmitting output stage has multiple, the transmit coil of multiple transmitting output stages lines up annular array so that
Any electrical equipment is in any position, towards any direction, always have a transmit coil and the receiving coil of electrical equipment close to
Unity couping.The square pulse of certain frequency is exported by microprocessor, transmitting output stage, control coupling battle array are delivered to through emitter follower
Each coil is individually powered in row.
Each wire loop of coupling array is by connecting one 1:Power supply electricity of 50 transformer to each transmitting output stage
Stream is sampled, and delivers to microprocessor through precision rectifying, A/D conversions, the maximum coil of degree of coupling is searched by microprocessor
It is independently-powered by the coil so as to lock, so that coupling efficiency reaches highest.Receiving coil receives energy by electromagentic resonance,
And by bridge rectifier to power supply for electrical equipment.Microprocessor is the control core of the system, by running the program of setting,
The size of output stage supply current can respectively be launched, so that the pulse signal of certain frequency is exported from specified output end,
With this which controls launch output stage individually to power.
Further, the transmitting output stage includes transmitting output circuit, and the transmitting output circuit includes transmitting coil
LS and receiving coil LD, wireless connection between the receiving coil LD and transmitting coil LS, the two ends connection of the transmitting coil
There is the second electric capacity C2, LS one end of the transmitting coil is grounded by the 3rd electric capacity C3 and the 4th electric capacity C4 respectively.The transmitting
Coil LS other end access VMOS FETs VT1 drain electrode, the source ground of the VMOS FETs VT1 is described
VMOS FETs VT1 grid is respectively connected to the 5th resistance R5 the 3rd triode VT of one end and access emitter stage, described
The 5th resistance R5 other end and the 3rd triode VT3 colelctor electrode are grounded, and the emitter stage of the 3rd triode VT3 connects
Enter the second triode VT2 emitter stage, the base stage of the 3rd triode VT3 accesses the second triode VT2 base stage, described
Second triode VT2 base stage connects first resistor R1 and the first electric capacity C1, the second triode VT2 colelctor electrode point respectively
It is not grounded by the 9th electric capacity C9 and the 8th electric capacity C8.
Further, the two ends of the receiving coil LD are connected with the 5th electric capacity C5, the two ends point of the 5th electric capacity C5
Not Lian Jie bridge diode a ends and b ends, the 6th electric capacity C6 of parallel connection and the is distinguished between the c ends and d ends of the bridge diode
Second resistance R2 and LED, the second resistance are in series between seven electric capacity C7, the two ends of the 7th electric capacity C7
One end that R2 one end connects 3rd resistor R3 and the 4th resistance R4 by switching SW respectively is, the LED
The other end connects 3rd resistor R3 and the 4th resistance the R4 other end respectively, and the bridge diode is by the first diode VD1,
Two diode VD2, the 3rd diode VD3 and the 4th diode VD4 are composed in series.
A pair of complementary emitter followers are added before the grid of VMOS FETs, emitter follower can the side of making
The rising and falling time of ripple is greatly reduced.VT1 grid voltage and drain voltage waveform, waveform are observed after energization with oscillograph
It is greatly improved.With the improvement of waveform, the operating efficiency of circuit also obtains great raising.When being not added with any load, (LD is remote
From LS), I1 only 24mA；When LD is with LS close coupling, I1 once increases to 300mA.12V electricity is obtained on load resistance simultaneously
Pressure, corrected performance is 2.8W, and energy conversion efficiency is：
.In the case where meeting power output, higher working frequency should be met.The experiment proved that, primary current with
The increase of system operating frequency and constantly reduce, primary current is smaller, and the power loss of system is also just smaller.Therefore, radio
The working frequency of energy Transmission system should be in high-frequency band, but the working frequency of wireless power circuit can not be too high, and frequency is higher
Requirement to VVMOS FETs is also higher, and the VVMOS FETs that current high frequency characteristics meets this requirement are also not easy
Find.It is advisable so we generally select the working frequency of circuit for 200kHz~1MHz.
In order to improve power utilization rate, a load automatic detection circuit can be designed, as shown in figure 5, by detecting output stage
The size of electric current determines whether load, with this controls radiating circuit to be standby or normal work.
The wherein analysis and selection of compensating electric capacity, it is primary and secondary to mix size in electromagentic resonance type wireless power transmission
Suitable resonant capacitance, the quality of resonance directly affects transmission range, power output and conversion efficiency.Deposited due to primary and secondary
In larger leakage inductance, this severely limits the available power of its transmission, in order to reduce the reactive power of system, resonance is mended
Repay electric capacity well-designed, monitored with oscillograph, it is to avoid resonance is in the frequency of higher hamonic wave.Compensation topology can be divided into string
Connection compensation and shunt compensation, can specifically be divided into 4 kinds of topological structures, as Figure 6-9,1. primary series compensation, secondary tandem
Compensation；2. primary series, secondary parallel；3. primary parallel, secondary tandem；4. primary parallel, secondary parallel.Primary compensation electricity
Appearance is in order to balance the anti-and secondary reflection of the leakage inductance of primary to primary sensing induction reactance, so as to reduce the apparent work(of induction power supply
Rate, improves the power factor of induction power supply.Secondary compensation can reduce the reactive power of secondary, improve the work(of secondary load
Rate factor, increases the power output of induction power supply.
Secondary tandem compensation electric capacity be：
, secondary is in resonant condition, in purely.Secondary parallel compensation electric capacity be：
, secondary is in resonant condition, in purely.Secondary tandem compensation, which reflects to primary impedance, is：
, secondary to primary Impedance of reflection is purely resistive.Secondary series and parallel reflects to primary impedance：
, secondary to primary Impedance of reflection is capacitive.Secondary tandem is compensated, and primary series compensation capacitance is：
.Secondary parallel is compensated, and primary series compensation capacitance is：
.Secondary tandem is compensated, and primary Shunt compensation capacitor is：
.Secondary parallel is compensated, and primary Shunt compensation capacitor is：
Due to the influence of the factors such as component aging, temperature change, load change, the resonant frequency of LC resonance circuits can be sent out
Raw to change, so as to influence transimission power and efficiency of transmission, we will take a series of frequency stabilization measure in the design.
1. the less inductance of temperature coefficient is used.For example, ferritic temperature coefficient is very big, when to the inductance of resonant tank
When amount proposes high stability requirement, it should avoid using the ferrite heart.Now, inductance coil can use high frequency magnetic drum frame, it
Temperature coefficient and be lost it is all smaller.
2. the less electric capacity of temperature coefficient is used, it is desirable to which electric capacity tolerance is stable, pressure-resistant more than 3 times more than Vcc1.Such as
It can use terylene electric capacity, polyethylene capacitor, mica capacitor etc., their temperature coefficient is smaller than other type capacitives, it is proposed that no
Use Leaded Ceramic Disc Capacitor.Variable capacitance preferably uses pole piece and the small metal material of rotating shaft linear expansion coefficient (such as iron-nickel alloy) to make.
Their temperature coefficient is small, stable and reliable for performance.It can also be mutually compensated for using the element of positive and negative temperature coefficient.Such as Leaded Ceramic Disc Capacitor
With positive temperature coefficient, some electric capacity has negative temperature coefficient.
3. transmitting output stage is using the good IGBT pipes of stability, and before output stage plus penetrates with buffering.
4. quality factor q reasonable in design.Primary transmission can increase to secondary electric energy with the increase of quality factor q,
But Q increase, working state of system will be very sensitive to load change, component parameters change and frequency change, and system is difficult steady
It is fixed, secondary bigger copper loss and iron loss are also resulted in, larger Q is also unfavorable for the tuning of system.By experimental verification, from engineering
Design angle considers that Q is typically advisable 5~10.Should be noted that in coiling inductance between the line of parallel densely packed coil distribution capacity compared with
Greatly, Q values are influenceed；For the more coil of the number of turn, such as frequency of oscillation is in below 2MHz, preferably using " duolateral " winding, and most
Handy multi cord, to reduce the influence of skin effect, to put forward high q-factor.
Launch output circuit, VCC2 6V, VCC1 15V, according to preceding according to system shown in Figure 3 block diagram and Fig. 4
State analysis and design and produce a laboratory sample, with 512KHZ square-wave signal emitted energies, survey data through experiment as shown in table 1.
The experimental result of table 1
The experiment show feasibility of electromagentic resonance wireless power transmission scheme, it is maximum that system can lock transimission power
Coil carry out power transmission, when transmitting coil inductance value occur minor variations when, efficiency of transmission is greatly reduced, and receives line
The inductance change of circle influences unobvious to efficiency of transmission.
The utility model carries out wireless power transmission from electromagentic resonance principle；Analyzing influence wireless power transmission efficiency,
Transimission power, the factor of transmission range, design improve interlock circuit；Multiple transmitting output stages are designed, using microprocessor as control
Core, runs the program of setting, the size of relatively more each transmitting output stage supply current, so as to export certain frequency from a certain output end
Which the pulse signal of rate, controls launch output stage and individually powers, improve power utilization rate, improve transmission effect with this
Rate, with very strong practicality.
Preferred embodiment of the present utility model described in detail above.It should be appreciated that the ordinary skill people of this area
Member just can make many modifications and variations without creative work according to design of the present utility model.Therefore, all this technology necks
Technical staff passes through logic analysis, reasoning or limited reality on the basis of existing technology according to design of the present utility model in domain
Available technical scheme is tested, all should be in the protection domain being defined in the patent claims.
Claims (7)
1. a kind of system for improving wireless power transmission efficiency, it is characterised in that：Including microprocessor, emitter follower, A/D
Converter, precise rectification circuit, current rectification circuit, receiving terminal and several transmitting output stages, the microprocessor is by penetrating
The each transmitting output stage of pole follower connection, the transmitting output stage connects receiving terminal and current detection circuit, the electricity respectively
Current detection circuit connects A/D converter by precise rectification circuit, and the A/D converter connects microprocessor, the receiving terminal
Including receiving circuit, rectification circuit and load, the receiving circuit is connected by rectification circuit and loaded.
2. a kind of system for improving wireless power transmission efficiency as claimed in claim 1, it is characterised in that：The transmitting is defeated
Going out pole includes transmitting output circuit, and the transmitting output circuit includes transmitting coil and receiving coil, the receiving coil and hair
Wireless connection between ray circle, the two ends of the transmitting coil are connected with the second electric capacity, and one end of the transmitting coil leads to respectively
Cross the 3rd electric capacity and the 4th capacity earth.
3. a kind of system for improving wireless power transmission efficiency as claimed in claim 2, it is characterised in that：The emission lines
The other end of circle accesses the drain electrode of VMOS FETs, the source ground of the VMOS FETs, the VMOS FETs
Grid be respectively connected to the 5th resistance the 3rd triode of one end and access emitter stage, the other end of the 5th resistance and the
The colelctor electrode of three triodes is grounded, and the emitter stage of the 3rd triode accesses the emitter stage of the second triode.
4. a kind of system for improving wireless power transmission efficiency as claimed in claim 3, it is characterised in that：Described 3rd 3
The base stage of pole pipe accesses the base stage of the second triode, and the base stage of second triode connects first resistor and the first electricity respectively
Hold, the colelctor electrode of second triode passes through the 9th electric capacity and the 8th capacity earth respectively.
5. a kind of system for improving wireless power transmission efficiency as claimed in claim 2, it is characterised in that：The reception line
The two ends of circle are connected with the 5th electric capacity, and the two ends of the 5th electric capacity connect a ends and b ends of bridge diode, the bridge respectively
The 6th electric capacity in parallel and the 7th electric capacity are distinguished between the c ends and d ends of formula diode.
6. a kind of system for improving wireless power transmission efficiency as claimed in claim 5, it is characterised in that：7th electricity
Second resistance and light emitting diode are in series between the two ends of appearance, one end of the second resistance connects the 3rd respectively by switch
One end of resistance and the 4th resistance is, the other end of the light emitting diode connects the another of 3rd resistor and the 4th resistance respectively
End.
7. a kind of system for improving wireless power transmission efficiency as claimed in claim 5, it is characterised in that：The bridge-type two
Pole pipe is composed in series by the first diode, the second diode, the 3rd diode and the 4th diode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621489497.9U CN206452186U (en) | 2016-12-30 | 2016-12-30 | A kind of system for improving wireless power transmission efficiency |
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| CN201621489497.9U CN206452186U (en) | 2016-12-30 | 2016-12-30 | A kind of system for improving wireless power transmission efficiency |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968451A (en) * | 2017-10-27 | 2018-04-27 | 深圳先进技术研究院 | Improved efficiency method and apparatus based on microwave wireless charging |
| CN109660008A (en) * | 2019-02-21 | 2019-04-19 | 南京达斯琪数字科技有限公司 | A kind of wireless power supply and electronic equipment |
| CN113364146A (en) * | 2021-07-16 | 2021-09-07 | 黄石邦柯科技股份有限公司 | Wireless energy transfer device with adjustable working frequency |
-
2016
- 2016-12-30 CN CN201621489497.9U patent/CN206452186U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968451A (en) * | 2017-10-27 | 2018-04-27 | 深圳先进技术研究院 | Improved efficiency method and apparatus based on microwave wireless charging |
| CN107968451B (en) * | 2017-10-27 | 2020-02-04 | 深圳先进技术研究院 | Efficiency improving method and device based on microwave wireless charging |
| CN109660008A (en) * | 2019-02-21 | 2019-04-19 | 南京达斯琪数字科技有限公司 | A kind of wireless power supply and electronic equipment |
| CN113364146A (en) * | 2021-07-16 | 2021-09-07 | 黄石邦柯科技股份有限公司 | Wireless energy transfer device with adjustable working frequency |
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