CN106026419A - Electromagnetic coupling wireless power transmission apparatus and method - Google Patents
Electromagnetic coupling wireless power transmission apparatus and method Download PDFInfo
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- CN106026419A CN106026419A CN201610457639.1A CN201610457639A CN106026419A CN 106026419 A CN106026419 A CN 106026419A CN 201610457639 A CN201610457639 A CN 201610457639A CN 106026419 A CN106026419 A CN 106026419A
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Abstract
The invention relates to an electromagnetic coupling wireless power transmission apparatus and method, and solves the shortcoming that a communication protocol is required by the Qi standard. The electromagnetic coupling wireless power transmission apparatus comprises a basic oscillating circuit which mainly comprises an amplification circuit 1, an input coil 2 and an output coil 3, and a control network which mainly comprises a receiving coil 4 and a feedback coil 5; and the basic oscillating circuit and the control network are in non-conductor connection. The basic oscillating circuit is connected with the control network are in a standby state when a high electromagnetic coupling condition does not exist, and are in an oscillating state when a high electromagnetic coupling condition exists; when power transmission is not required, the control network is far from the basic oscillating circuit; or/and the connection between the receiving coil 4 and the feedback coil 5 is disconnected; or/and the two ends of the receiving coil 4 and the feedback coil 5 are short circuited; when power transmission is required, the control network is close to the basic oscillating circuit; or/and the connection between the receiving coil 4 and the feedback coil 5 is closed; or/and the two ends of the receiving coil 4 and the feedback coil 5 are open circuited. The electromagnetic coupling wireless power transmission apparatus and method are widely applied to the fields of wireless charging and power transmission of automobiles, mobile phones and electric appliances.
Description
One. technical field
The invention belongs to wireless power transmission field, particularly to electromagnetic coupled wireless power transmission device and method.
Two. background technology
Physicist Ni Gula-tesla in 1889, the most different wireless power transmission skills are traced back in the proposition of wireless power transmission the earliest
The difference of art has much, and they principles behind are exactly the electromagnetic coupling phenomena known to us, utilizes change specifically
Electric field produces the magnetic field of change, and the magnetic field of recycling change produces electric field, thus producing electric current is equipment transmission of electricity.
It is known that the direction in magnetic field produced around an electrified wire is perpendicular to the sense of current, and right and wrong under normal circumstances
The faintest, but if by wire around circular or spiral type, the magnetic field of equidirectional will superposition, thus formed
Stronger magnetic field.The transformator that the principle of wireless power transmission is common in being similar to our life in fact, is all to utilize in a coil
Electric current in another coil, produce electric current.But it is different from transformator by the way of iron core conduct magnetic field, wireless power transmission equipment
In induction coil have passed through some special adjustment, with air for medium conduct magnetic field, thus produce faradic current.With
Time, the resonance with sound is the same, and two coil-induced being also required to arrange a resonant frequency, makes receiving coil and output winding
Frequency is consistent, thus in the case of output winding electric current is the least, also can produce sufficiently strong faradic current in receiving coil.
Wireless power transmission technology has three kinds of modes substantially, is electromagnetic coupled, radio wave and resonant interaction respectively, on this basis,
Wireless power transmission has the alliance standard of three comparative maturities at present: Qi standard, PMA standard and A4WP standard.Due to current wireless defeated
Electricity is mainly used in battery charging, the most generally wireless power transmission is referred to as wireless charging.
There is presently no the equipment listing using A4WP technology, so in three kinds of modes, which technology is more excellent the most unknown.
For domestic consumer, equipment compatibility and efficiency are only their most concerned two factors, for this angle, Qi and
PMA slightly advantage；And for coffee shop etc public arena, it is possible to the A4WP wireless power transmission skill simultaneously transmitted electricity for multiple equipment
Art is the most practical.But, most possible factor or the utility ratio of these three standard determining that who can win, and this side
Face, has the Qi of many affiliates and the listing equipment of money more than 100 to hold a safe lead.
In three kinds of wireless power transmission technology, most widely used is Qi wireless charging standard, and Qi is to be joined by radio source
The standard that alliance's (Wireless Power Consortium is called for short WPC) proposes, has portability and the big feature of versatility two.
WPC is the standardization body of global first promotion wireless power transmission technology, is also wireless power transmission normal structure the most maximum,
Its member includes 137 affiliates from 15 country variants, including HTC, Nokia LG, Motorola, Samsung
Deng, and the equipment listing of the existing lift-launch Qi technology of money more than 100.Qi transmits electricity based on electromagnetic coupled principle, this system by
Emitter coil and receiver coil composition, two coils collectively form an electromagnetic coupled induction apparatus.Entrained by emitter coil
Alternating current generate magnetic field, and by sensing make receiver coil generation voltage.
Qi have employed less induction coil such that it is able to transmits electric energy the most at higher frequencies.Qi present stage is only
The electronic product of below 5W provides wireless power transmission, such as smart mobile phone, panel computer, camera etc..Power supplying efficiency also only has
50.2%, the average efficiency of mutually more common DC power source adapter 72% differs greatly, but phase for wireless power transmission technology
When considerable.And in long-term development targets, Qi power transmission terminal is implanted to each public places such as family, automobile, train by WPC plan.
But its shortcoming is also apparent from, that is, need the communication protocol between emitter and receptor.
Qi wireless charging communication protocol uses backscatter modulation system, is exactly a kind of load modulation system in simple terms,
It is similar to the principle of RFID.And wireless charging process is mainly controlled by Power Receiver (referring generally to mobile phone), and Power
Transmitter (charging panel) is that passive acceptance asks and process.
Qi wireless charging communication process is as follows:
1) mobile phone is placed on charging panel.
2) charging panel is detected with object according to the capacitance variations of sending side coil and has been placed on charging panel.
3) charging panel uses electric power signal to primary coil as ping message, and waits time-out, if time-out just explanation is
Foreign body has been placed on charging panel, and at this moment supply of electric power cancelled by charging panel, and this process is also FOD, i.e. foreign bodies detection；If
It is not timed-out, is put into next step.
4) mobile phone detects that secondary coil has sensed voltage signal, just sends Signal Strength message (at the beginning of to the effect that
Level coil and the degree of coupling of secondary coil, the position namely put is the most just).
5) charging panel detects Signal Strength message, cancels time-out, enters the ID&Configuration stage, etc.
Treat that mobile phone sends both message.
6) mobile phone sends ID message (including VID and product ID), sends Configuration message (mainly rectified current
Road needs the peak power Max Power=UI of output).
7) charging panel adjusts the corresponding parameter of primary coil according to the Configuration message accepted, and adjusts primary coil shake
Swing frequency to start to send normal electric power.
8) in charging process, charging panel also accepts the message such as the Charge Status and Control Error of mobile phone transmission, example
Battery such as mobile phone is filled with, and mobile phone sends charging complete message, and charging panel receives message and just stops charging.
The wireless charging communication protocol that Qi wireless charging standard introduces, is to ensure that the necessary bar that Qi wireless charging standard is implemented smoothly
Part is indispensable.Once removing Qi wireless charging communication protocol, whether charging panel does not knows mobile phone, panel computer, camera etc.
On charging panel, it is not known that when start transmission of electricity, also do not know whether battery is full of, when stop transmission of electricity.
The wireless charging communication protocol that Qi wireless charging standard introduces, needs to add wireless charging communication protocols on charging panel and mobile phone
The chip of view, which increases the complexity of wireless charging device, makes the reliability decrease of wireless charging device, add body simultaneously
Long-pending, power consumption and cost, and the difference of the wireless charging communication protocol due to different manufacturers, reduce holding concurrently of wireless charging device
Capacitive.
Meanwhile, in Qi wireless charging standard, two coil-induced needs arrange a resonant frequency, make receiving coil and output winding
Frequency consistent, thus in the case of output winding electric current is the least, also can produce sufficiently strong faradic current in receiving coil,
Increase transmission range, improve efficiency of transmission.But, the resonant frequency that will make two coils is completely the same, there is being stranded in production
Difficult.Even if the resonant frequency solving two coils in production is completely the same, As time goes on, resonant frequency also can be drifted about,
And can change with different speed and direction.Now with company have been noted that this problem, propose frequency sweep transmission tariff and come
Ensure the resonance of two coils.This increases the complexity of Qi wireless charging standard, volume, power consumption and cost further.
If able to remove wireless charging communication protocol, remain the resonance of two coils, wireless charging can be greatly reduced and set
Standby complexity, improves transmission range, efficiency of transmission and reliability, reduces the volume of wireless charging device, power consumption and cost,
Eliminate the difference of the wireless charging communication protocol of different manufacturers, improve compatibility, allow wireless power transmission really be widely used in people's
Daily life, brings the world not having plug and plate.
The electromagnetic coupled wireless power transmission device of present invention offer and method, precisely in order to solve this technical barrier.
Three. summary of the invention
It is an object of the invention to provide a kind of electromagnetic coupled wireless power transmission device and method, when receptor is away from emitter, automatically
Stopping transmission of electricity, enter holding state, when receptor is near emitter, automatically transmit electricity for receptor, charging terminates to stop transmission of electricity,
Without communication protocol, the resonance of transmission of electricity process hold-in winding.This makes it possible to overcome the disadvantages mentioned above of Qi wireless charging standard, carry
High transmission range, efficiency of transmission, reliability, versatility and compatibility, reduce the complexity of wireless charging device, volume,
Power consumption and cost, expand wireless power transmission range of application.
The object of the present invention is achieved like this: a kind of electromagnetic coupled wireless power transmission device and method, and electromagnetic coupled wireless power transmission fills
Putting and be mainly made up of basis oscillating circuit (being equivalent to emitter) and control network (being equivalent to receptor) two parts, basis shakes
Swing circuit and be connected without wire with controlling network, by basis oscillating circuit and the power of control network electromagnetic coupled each other,
Control electromagnetic coupled wireless power transmission device feedback amplitude or and phase place, allow electromagnetic coupled wireless power transmission device be in holding state or
Oscillatory regime (transmission of electricity state).Fig. 1 is shown in by electromagnetic coupled wireless power transmission device composition schematic diagram.
The composition of electromagnetic coupled wireless power transmission device various piece is as follows:
1) electromagnetic coupled wireless power transmission device is mainly made up of basis oscillating circuit and control network two parts, oscillating circuit portion, basis
Point mainly be made up of amplifying circuit 1, input coil 2 and output winding 3, control network portion mainly by receiving coil 4 and time
Feeder line circle 5 forms.
2) basis oscillating circuit and control network can comprise attached components and parts, such as power supply, wire, load, electric capacity, frequency-selecting net
Active and the passive components such as network, fixed amplitude circuit, switch, integrated circuit, diode；
3) amplifying circuit 1 is the homophase or see-saw circuit being mainly made up of active components and parts, and amplifying circuit 1 is at working frequency range
On there is amplifying power, meet the requirements such as amplification, power, frequency, running voltage；
4) input coil 2, output winding 3, receiving coil 4 and feedback coil 5 are main by wire or printed wire technique system
The inductance coil made, can comprise resonant capacitance, forms LC resonant tank, it is also possible to comprise other attached components and parts, such as magnetic
Components and parts etc..
The connection of electromagnetic coupled wireless power transmission device various piece is as follows:
1) basis oscillating circuit is connected without wire with controlling network；
2), in the oscillating circuit of basis, the input of amplifying circuit 1 is connected with input coil 2, and the outfan of amplifying circuit 1 is with defeated
Go out coil 3 to connect；
3) controlling in network, receiving coil 4 and feedback coil 5 connect.
The relative position of electromagnetic coupled wireless power transmission device various piece is as follows:
1) output winding 3 of basis oscillating circuit with control the receiving coil 4 of network and the input coil 2 of basis oscillating circuit and
The feedback coil 5 controlling network can be sufficiently close together when needed and can produce strong electromagnetic coupled；Or it is sufficiently close together always,
Strong electromagnetic coupled can be produced when needed.
2) basis oscillating circuit and control network, can combine, form one, by controlling the accessory switch on network,
The power of control electromagnetic coupled each other；Can also be separated, separate, without constraint, it is possible to be sufficiently close together and far
From, by relative position be sufficiently close together and away from, control the power of electromagnetic coupled each other.
3) controlling in network, receiving coil 4 and feedback coil 5 can put together, and form an entirety, controlling network
When being sufficiently close together basis oscillating circuit, the output winding 3 of basis oscillating circuit is allowed to shake with the receiving coil 4 and basis controlling network
The input coil 2 swinging circuit is sufficiently close together with the feedback coil 5 controlling network, it is possible to produce strong electromagnetic coupled；Can also divide
Open and be placed on diverse location, produce strong electromagnetic coupled when required by accessory switch.
4) in the oscillating circuit of basis, amplifying circuit 1, input coil 2 and output winding 3, can put together, form one
Individual entirety；Can also separate or part is separated at diverse location.
The relation of electromagnetic coupled wireless power transmission device various piece is as follows:
1), when electromagnetic coupled wireless power transmission device is in holding state, basis oscillating circuit is also at holding state, controls network not
Electric energy can be received；When electromagnetic coupled wireless power transmission device is in oscillatory regime, basis oscillating circuit and control network are as vibrating back
The part on road, is in oscillatory regime, basis oscillating circuit transmission electric energy, controls network and receive and provide electric energy for load.
2) the electromagnetic coupled relation between basis oscillating circuit and control network, is mainly manifested in the input coil of basis oscillating circuit
Electricity between 2 and the feedback coil 5 of control network and the output winding 3 of basis oscillating circuit and the receiving coil 4 controlling network
Magnetic coupling.When there is strong electromagnetic coupled between basis oscillating circuit and control network, it is mainly manifested in input coil 2 and returns
Strong electromagnetic coupled is there is between feeder line circle 5 and output winding 3 and receiving coil 4；When basis oscillating circuit with control network it
Between when there is not strong electromagnetic coupled, be mainly manifested in input coil 2 and feedback coil 5 and output winding 3 and receiving coil 4
Between there is not strong electromagnetic coupled；Locate between input coil 2 and receiving coil 4 and feedback coil 5 and output winding 3 always
In more weak electromagnetic coupled；Electromagnetic coupled wireless power transmission device is affected by the electromagnetic coupled between feedback coil 5 and receiving coil 4
Less.
3) basis oscillating circuit can by attached resonant capacitance or and frequency-selective network, there is fixing frequency of oscillation F1；Also
Can there is no fixing frequency of oscillation, by the frequency of oscillation controlling network decision electromagnetic coupled wireless power transmission device.
4) control network can by add attached resonant capacitance or and frequency-selective network, make control network have fixing resonant frequency
F2；Can also there is no fixing frequency of oscillation, basis oscillating circuit determine the frequency of oscillation of electromagnetic coupled wireless power transmission device.
5) basis oscillating circuit and when controlling the most unfixing vibration of network and resonant frequency, electromagnetic coupled wireless power transmission device
Frequency of oscillation is together decided on by basis oscillating circuit and control network.
From the point of view of actually used, with controlling network, there is fixing resonant frequency when basis oscillating circuit has fixing frequency of oscillation,
And when resonant frequency F2 of frequency of oscillation F1 of basis oscillating circuit and control network is close and produces resonance, it is possible to increase control
Network processed controls distance and the electric energy efficiency of transmission of basis oscillating circuit.
Electromagnetic coupled wireless power transmission device adjustment method is as follows:
1), when basis oscillating circuit does not exist strong electromagnetic coupled with control network, by the method for electromagnetic shielding, input coil is shielded
2 and output winding 3 electromagnetic coupled each other, make amplifying circuit 1 faint by the feedback of output winding 3 → input coil 2,
Make basis oscillating circuit self not reach the feedback amplitude producing vibration, be unsatisfactory for producing the feedback amplitude condition of vibration, be in
Holding state, whole electromagnetic coupled wireless power transmission device is also at holding state；Or, by exchange input coil 2 and output
The connection end of coil 3, changes feedback phase so that the basis of input coil 2, output winding 3 and amplifying circuit 1 composition shakes
Swinging circuit from as weak negative-feedback circuit, be in holding state, whole electromagnetic coupled wireless power transmission device is also at holding state.
2) when basis oscillating circuit exists strong electromagnetic coupled with control network, if the input coil 2 of basis oscillating circuit is with defeated
Go out coil 3 electromagnetic coupled each other faint and be in holding state, then by output winding 3 → receiving coil, 4 → feedback
The feedback network of coil 5 → input coil 2, electromagnetic coupled wireless power transmission device can reach to produce the amplitude bar of positive feedback vibration
Part, is controlled receiving coil 4 and the connection end of feedback coil 5 of network, meets the phase place bar producing positive feedback vibration by exchange
Part, electromagnetic coupled wireless power transmission device produces positive feedback vibration；If the basis input coil 2 of oscillating circuit, output winding 3
When forming weak negative-feedback circuit with amplifying circuit 1 and be in holding state, then by output winding 3 → receiving coil 4 → return
The feedback signal amplitude of feeder line circle 5 → input coil 2, more than the feedback signal amplitude of output winding 3 → input coil 2, superposition
The amplitude of rear feedback signal is both differences, and phase place is output winding 3 → receiving coil, 4 → feedback coil, 5 → input coil 2
Feedback signal phase place, controls receiving coil 4 and the connection end of feedback coil 5, the electromagnetic coupled wireless power transmission of network by exchange
Device can reach to produce the phase and amplitude condition of positive feedback vibration, and electromagnetic coupled wireless power transmission device is in holding state.
Electromagnetic coupled wireless power transmission device two kinds of duties of existence: oscillatory regime (transmission of electricity state) and holding state.Electromagnetism coupling
When conjunction wireless power transmission device is in oscillatory regime, basis oscillating circuit is in vibration with controlling a network part as oscillation circuit
State, basis oscillating circuit transmission electric energy, control network and receive and provide electric energy for accessory loads.Electromagnetic coupled wireless power transmission fills
Putting when being in holding state, basis oscillating circuit is also at holding state, only consumes small electric energy, and it is not attached for controlling network
Load provides electric energy.
The using method of electromagnetic coupled wireless power transmission device, it is simply that by basis oscillating circuit and control network electromagnetism each other
The strong and weak of coupling controls electromagnetic coupled wireless power transmission device so that electromagnetic coupled wireless power transmission device is at oscillatory regime and holding state
Two kinds of duties are changed.The using method of electromagnetic coupled wireless power transmission device has displacement-controlled method and two kinds of sides of on-off control method
Method.
1) displacement-controlled method of electromagnetic coupled wireless power transmission device: by controlling network and or the relative position of basic oscillating circuit
Be sufficiently close together and away from, change basis oscillating circuit and control network electromagnetic coupled each other power, control electromagnetic coupled
The duty of wireless power transmission device.
When need not transmit electricity, controlling network and being sufficiently far from basis oscillating circuit, the output winding 3 of basis oscillating circuit and control
The receiving coil 4 of network and the input coil 2 of basis oscillating circuit are sufficiently far from the feedback coil 5 controlling network, and basis shakes
Swinging circuit and there is not strong electromagnetic coupled with controlling network, basis oscillating circuit self is in holding state, whole electromagnetic coupled without
Line power transmitting device is also at holding state.
When needs are transmitted electricity, control network and be sufficiently close together basis oscillating circuit, the input coil 2 of basis oscillating circuit and Controling network
The feedback coil 5 of network and the output winding 3 of basis oscillating circuit are sufficiently close together with the receiving coil 4 controlling network, basis vibration
There is strong electromagnetic coupled with controlling network in circuit, electromagnetic coupled wireless power transmission device is in oscillatory regime, provides electric energy for load.
The feedback coil 5 and the receiving coil 4 that control network can exchange, and controlling feedback coil 5 and the receiving coil 4 of network
Electrical quantity identical time, do not affect using effect, during electrical quantity difference, have certain impact.
2) the on-off control method of electromagnetic coupled wireless power transmission device: control network accessory switch, the input coil of basis oscillating circuit
2 are sufficiently close together with the receiving coil 4 of control network with the output winding 3 of feedback coil 5 and basis oscillating circuit controlling network,
By controlling disconnection and the Guan Bi of network accessory switch, change basis oscillating circuit and control network electromagnetic coupled each other
Power, controls the duty of electromagnetic coupled wireless power transmission device.
When need not transmission of electricity, disconnect the connection between receiving coil 4 and feedback coil 5 by controlling network accessory switch, or
With short circuit receiving coil 4 or and feedback coil 5 two ends and cause receiving coil 4 or and feedback coil 5 afunction so that
The feedback circuit of output winding 3 → receiving coil, 4 → feedback coil, 5 → input coil 2 cannot be formed, basis oscillating circuit and control
There is not strong electromagnetic coupled in network processed, basis oscillating circuit is in holding state, and electromagnetic coupled wireless power transmission device is also at treating
Machine state.
When needs are transmitted electricity, by controlling the connection between network accessory switch Guan Bi receiving coil 4 and feedback coil 5, or and
Open circuit receiving coil 4 or the two ends with feedback coil 5 so that output winding 3 → receiving coil, 4 → feedback coil, 5 → input line
The feedback circuit of circle 2 is formed, and basis oscillating circuit exists strong electromagnetic coupled, electromagnetic coupled wireless power transmission device with controlling network
It is in oscillatory regime, provides electric energy for load.
The on-off control method of electromagnetic coupled wireless power transmission device, can only be at the input coil 2 of basis oscillating circuit and control network
The output winding 3 of feedback coil 5 and basis oscillating circuit and the receiving coil 4 controlling network can make the when of being sufficiently close together
With, can collaborative with the displacement-controlled method of electromagnetic coupled wireless power transmission device use.
The advantage of this electromagnetic coupled wireless power transmission device and method is: can be wireless defeated by electromagnetic coupled according to load needs
The using method of electric installation controls its duty, is converted into positive feedback oscillatory regime from holding state, or vibrates from positive feedback
State Transferring becomes holding state, and need not control network and notify basis oscillating circuit by communication protocol, removes basis vibration completely
Circuit (electric energy transmitting terminal) and the communication protocol controlled between network (electric energy receiving terminal).Further, electromagnetic coupled wireless power transmission
When device is in oscillatory regime, basis oscillating circuit is in oscillatory regime with controlling a network part as oscillation circuit, it is ensured that
Basis oscillating circuit and control network are in resonance state.It is greatly improved transmission range, efficiency of transmission and reliability, reduces wireless
The complexity of charger, volume, power consumption and cost, eliminate the difference of the wireless charging communication protocol of different manufacturers, improves and holds concurrently
Capacitive, is widely used in the defeated charging of line and the field of power transmission of automobile, mobile phone and electrical equipment.
In foregoing invention, during the uncontrolled web influence of oscillating circuit of basis, basis oscillating circuit is holding state, basis vibration
During the controlled web influence of circuit, proceed to oscillatory regime.It is true that during the uncontrolled web influence of oscillating circuit of basis, permissible
It is oscillatory regime, during the controlled web influence of oscillating circuit of basis, proceeds to holding state.Now, electromagnetic coupled wireless power transmission dress
The composition putting various piece is identical with the relative position of various piece, electromagnetic coupled wireless power transmission device adjustment method and using method
Make suitably modified, when allowing basis oscillating circuit there is not strong electromagnetic coupled with control network, be in oscillatory regime, basis vibration
When circuit exists strong electromagnetic coupled with control network, proceed to holding state.
Four. accompanying drawing explanation
Fig. 1 is electromagnetic coupled wireless power transmission device schematic diagram.
Fig. 2 is wireless fever tablet circuit theory diagrams.
Fig. 3 is constant temperature wireless fever tablet circuit theory diagrams.
Fig. 4 is wireless charger circuit theory diagrams.
Five. detailed description of the invention
Below in conjunction with embodiment, further illustrate the present invention.
Embodiment one: wireless fever tablet
Wireless fever tablet is by transmitting electricity plate and fever tablet forms, plate such as mobile phone size of transmitting electricity, interior charged pool, and fever tablet is that silica gel wraps up
Thin slice.Fixing fever tablet is sufficiently close together fever tablet at the position needing heating, hand-held transmission of electricity plate, and fever tablet is generated heat, and reaches one
After fixed temperature, remove transmission of electricity plate.
Wireless fever tablet circuit is as shown in Figure 2.Wherein resistance R1, electric capacity C1, audion Q and diode D composition reversely amplify
Circuit 1；Plane inductive coil L1 is output winding 3；Plane inductive coil L2 is input coil 2；Plane inductive coil L3
For feedback coil 5；Plane inductive coil L4 is receiving coil 4.
The composition of wireless fever tablet various piece is as follows:
1) the device part of wireless fever tablet is mainly by transmission of electricity plate (i.e. basis oscillating circuit, plate of hereinafter referred to as transmitting electricity) with fever tablet is (i.e.
Control network, hereinafter referred to as fever tablet) two parts composition, transmission of electricity plate part mainly by amplifying circuit 1, plane inductive coil L1 and
Plane inductive coil L2 forms, and fever tablet part is mainly made up of plane inductive coil L3 and plane inductive coil L4；
2) transmission of electricity plate attached battery BT etc., fever tablet attached heating resistor R2 and resonant capacitance C3 etc.；
3) amplifying circuit 1 is mainly made up of resistance R1, electric capacity C1, audion Q and diode D etc.；
4) plane inductive coil L1 and plane inductive coil L2 is made by enamel-covered wire, circular, diameter 40mm, thickness 2mm；Flat
Face inductance coil L3 and plane inductive coil L4 is made by printed circuit, circular, diameter 40mm.Plane inductive coil L1 and
Plane inductive coil L2 is fixed on diameter 50mm soft magnetic ferrite sheet, and soft magnetic ferrite chip size is more than plane inductive coil L1
With plane inductive coil L2.Plane inductive coil L1 attached resonant capacitance C2.
The connection of wireless fever tablet various piece is as follows:
1) transmission of electricity plate is connected without wire with fever tablet.
2) in transmission of electricity plate, the input of amplifying circuit 1 is connected with plane inductive coil L2, and the outfan of amplifying circuit 1 is with flat
Face inductance coil L1 connects；
3), in fever tablet, heating resistor R2, resonant capacitance C3, plane inductive coil L3 and plane inductive coil L4 connect；
The relative position of wireless fever tablet various piece is as follows:
1) transmission of electricity plate can be with relative movement with fever tablet, mutually without constraint.
2), in transmission of electricity plate, amplifying circuit 1 is placed on the one side of one piece of metal plate, plane inductive coil L1 and plane inductor wire
Circle L2 is placed on the another side of same metal plate；Plane inductive coil L1 and plane inductive coil L2 center of circle 120mm apart,
Non-overlapping, the side of soft magnetic ferrite sheet is fixed on metal plate；Metal plate, amplifying circuit 1, plane inductive coil
L1 and plane inductive coil L2 forms an entirety.
3), in fever tablet, heating resistor R2 and resonant capacitance C3 is placed on the one side of one piece of non-metal flat plate, plane inductive coil
L3 and plane inductive coil L4 is placed on the another side of same non-metal flat plate, and the center of circle is at a distance of 120mm, non-overlapping.Parcel silica gel,
Form an entirety.
4) plane inductive coil L1 and plane inductive coil L4 and plane inductive coil L2 and plane inductive coil L3 is when needed
Can be sufficiently close together and strong electromagnetic coupled can be produced.
The relation of wireless fever tablet various piece is as follows:
1) when transmission of electricity plate is in holding state, wireless fever tablet is also at holding state, and fever tablet can not receive electric energy heating；Nothing
When line fever tablet is in oscillatory regime, transmission of electricity plate and fever tablet are in oscillatory regime as the part of oscillation circuit, transmission of electricity plate,
Fever tablet receives electric energy heating.
2) the electromagnetic coupled relation between transmission of electricity plate and fever tablet, is mainly manifested in plane inductive coil L2 and the heating of transmission of electricity plate
Electromagnetism coupling between plane inductive coil L3 and the plane inductive coil L1 and the plane inductive coil L4 of fever tablet of transmission of electricity plate of sheet
Close.Exist strong between plane inductive coil L2 and plane inductive coil L3 and plane inductive coil L1 and plane inductive coil L4
Electromagnetic coupled time, transmission of electricity plate and fever tablet between there is strong electromagnetic coupled；Plane inductive coil L2 and plane inductive coil
When there is weak electromagnetic coupled between L3 and plane inductive coil L1 and plane inductive coil L4, deposit between transmission of electricity plate and fever tablet
In weak electromagnetic coupled；Plane inductive coil L2 and plane inductive coil L4 and plane inductive coil L3 and plane inductive coil
Electromagnetic coupled between L1 is small and weak；Electromagnetic coupled between plane inductive coil L3 and plane inductive coil L4 is to wireless fever tablet
Affect less.
3) by attached resonant capacitance C2, transmission of electricity plate has fixing frequency of oscillation F1.
4) by attached resonant capacitance C3, fever tablet has fixing resonant frequency F2.
5) resonant frequency F2 of fever tablet can produce resonance close to frequency of oscillation F1 of transmission of electricity plate, transmission of electricity plate and fever tablet.
Wireless fever tablet adjustment method is as follows:
1), when transmission of electricity plate and fever tablet do not exist strong electromagnetic coupled, plane inductive coil L1 and plane are shielded with metal plate
Inductance coil L2 electromagnetic coupled each other so that plane inductive coil L1 and plane inductive coil L2 electromagnetism each other
Coupling faint, the transmission of electricity plate being made up of amplifying circuit 1, plane inductive coil L1 and plane inductive coil L2 does not reaches generation and shakes
The feedback amplitude swung, transmission of electricity plate is unsatisfactory for oscillation amplitude condition, is in holding state.
2) when transmission of electricity plate and fever tablet exist strong electromagnetic coupled, by exchange plane inductance coil L3 and plane inductive coil L4
Connection end so that plane inductive coil L1, plane inductive coil L2, plane inductive coil L3, plane inductive coil L4 and
The circuit of amplifying circuit 1 composition meets feedback phase and the amplitude conditions of positive feedback oscillating circuit, and wireless fever tablet produces positive feedback
Vibration, is in oscillatory regime, provides electric energy for fever tablet attached heating resistor R2.
Wireless fever tablet two kinds of duties of existence: oscillatory regime and holding state.
During oscillatory regime, transmit electricity the amplifying circuit 1 of plate, plane inductive coil L1 and plane inductive coil L2, adds fever tablet
Plane inductive coil L3 and plane inductive coil L4, forms a complete positive feedback oscillating circuit, provides for heating resistor R2
Electric energy；During holding state, transmission of electricity plate is not affected by fever tablet, the plane inductive coil L1 and plane inductive coil L2 of transmission of electricity plate
Electromagnetic coupled each other is faint, and transmission of electricity plate is unsatisfactory for producing the amplitude conditions of vibration, is in holding state, is not heating electric
Resistance R2 provide electric energy, only consumes small electric energy, can be converted into positive feedback vibration at any time.
The using method of wireless fever tablet is through fever tablet and the strong and weak of transmission of electricity plate electromagnetic coupled each other controls transmission of electricity
Plate so that whole device is changed in two kinds of duties.The using method of wireless fever tablet selects displacement-controlled method: by moving
Dynamic fever tablet and or plate of transmitting electricity relative position be sufficiently close together and away from, control the duty of wireless fever tablet.
When fever tablet is away from transmission of electricity plate, there is not strong electromagnetic coupled in transmission of electricity plate and fever tablet, transmission of electricity plate is not affected by fever tablet,
Plane inductive coil L1 and the plane inductive coil L2 electromagnetic coupled each other of transmission of electricity plate is faint, and transmission of electricity plate is unsatisfactory for producing
The amplitude conditions of vibration, is in holding state.
When fever tablet is sufficiently close together transmission of electricity plate, there is strong electromagnetic coupled in transmission of electricity plate and fever tablet so that the plane electricity of transmission of electricity plate
Sense coil L1 and the plane inductive coil L4 of fever tablet, the plane inductive coil L2 of transmission of electricity plate and the plane inductive coil of fever tablet
L3 is sufficiently close together, and produces strong electromagnetic coupled, plane inductive coil L1, plane inductive coil L2, plane inductive coil L3,
The circuit of plane inductive coil L4 and amplifying circuit 1 composition meets the phase and amplitude condition of positive feedback oscillating circuit, produces positive and negative
Feedback vibration, is in oscillatory regime, provides electric energy for heating resistor R2.
Heating resistor R2 can be single heating resistor, it is also possible to be plane inductive coil L3 and plane inductive coil L4 etc.
Effect internal resistance.
This wireless fever tablet can apply to the daily life such as health care heating treating, heating, and advantage is: can move as required
Dynamic fever tablet or and transmission of electricity plate control the heating of wireless fever tablet, and without fever tablet by communication protocol notice transmission of electricity plate, completely
Remove the communication protocol between transmission of electricity plate (electric energy transmitting terminal) and fever tablet (electric energy receiving terminal), improve self adaptation degree,
Simply, small and exquisite, inexpensively, reliably, as long as size and resonant frequency are close, the product of different manufacturers can be the most general, compatible
Property high.
Embodiment two: fever tablet that constant temperature is wireless
The wireless fever tablet of embodiment one does not possess temperature incubation function, can on the basis of the wireless fever tablet of embodiment one,
Add temperature control element and realize the function of fever tablet automatic constant-temperature.
The device part of fever tablet that constant temperature is wireless is essentially identical with the device part of the wireless fever tablet of embodiment one, and difference is
In fever tablet, add normally closed temperature switch S, normally closed temperature switch S be fixed on the vicinity of the heating resistor R2 of fever tablet.Circuit
As shown in Figure 3.
The using method of fever tablet that constant temperature is wireless remains the displacement-controlled method of the wireless fever tablet of embodiment one, adds switch
Control methods: be opened or closed plane inductive coil L3 and the connection of plane inductive coil L4 by normally closed temperature switch S, controls
The duty of fever tablet that constant temperature is wireless.
When temperature is higher than the characteristic temperature of normally closed temperature switch S, normally closed temperature switch S disconnects, and transmission of electricity plate is not by fever tablet shadow
Ringing, the feedback circuit of inductance coil L1 → inductance coil L4 → inductance coil L3 → inductance coil L2 cannot be formed, transmission of electricity plate
Plane inductive coil L1 and plane inductive coil L2 electromagnetic coupled each other is faint, and transmission of electricity plate is unsatisfactory for producing the width of vibration
Degree condition, is in holding state.
When temperature is less than the characteristic temperature of normally closed temperature switch S, normally closed temperature switch S closes so that the plane electricity of transmission of electricity plate
Sense coil L1 and the plane inductive coil L4 of fever tablet, the plane inductive coil L2 of transmission of electricity plate and the plane inductive coil of fever tablet
L3 produces strong electromagnetic coupled, forms amplifying circuit 1, plane inductive coil L1, plane inductive coil L4, plane inductive coil
The positive feedback oscillating circuit of L3 and plane inductive coil L2, meets the phase and amplitude condition producing vibration, produces positive feedback and shakes
Swing, provide electric energy for heating resistor R2.
Fever tablet that this constant temperature is wireless is in addition to being applied to health care heating treating, heating, it is also possible to be applied to the daily life such as freeze-day with constant temperature,
In addition to possessing the advantage of wireless fever tablet, also improve the safety of wireless fever tablet, extend the range of application of wireless fever tablet.
Embodiment three: wireless lithium battery charger
Wireless lithium battery charger is by transmitting electricity plate and charge sheet forms, and plate such as mobile phone size of transmitting electricity, interior charged pool, charge sheet is thin
Sheet.Lithium battery is attached on charge sheet, and hand-held charge sheet is sufficiently close together transmission of electricity plate, and charge sheet is lithium cell charging, after being full of,
Transmission of electricity plate is automatically into holding state.
Wireless lithium battery charger circuit is as shown in Figure 4.Wherein resistance R1, electric capacity C1, audion Q and diode D composition are put
Big circuit 1；Plane inductive coil L1 is output winding 3；Plane inductive coil L2 is input coil 2；Plane inductive coil L3
For feedback coil 5；Plane inductive coil L4 is receiving coil 4.
The composition of wireless lithium battery charger various piece is as follows:
1) wireless lithium battery charger mainly (is i.e. controlled by transmission of electricity plate (i.e. basis oscillating circuit, plate of hereinafter referred to as transmitting electricity) and charge sheet
Network processed, hereinafter referred to as charge sheet) two parts composition, transmission of electricity plate part is mainly by amplifying circuit 1, plane inductive coil L1 peace
Face inductance coil L2 forms, and charge sheet part is mainly made up of plane inductive coil L3 and plane inductive coil L4；
2) transmission of electricity plate attached battery BT etc., charge sheet attached commutation diode D2, commutation diode D3, commutation diode D4,
Commutation diode D5, relay K, filter capacitor C5, lithium cell charging control device KZ, lithium battery LTB, decompression capacitor C4
With resonant capacitance C3 etc.；
3) amplifying circuit 1 is mainly made up of resistance R1, electric capacity C1, audion Q and diode D etc.；
4) plane inductive coil L1 and plane inductive coil L2, plane inductive coil L3 and plane inductive coil L4 are by enamel-covered wire
Making, be fixed on soft magnetic ferrite sheet, soft magnetic ferrite chip size is more than plane inductive coil.Plane inductive coil L1 is attached
Resonant capacitance C2.
5) lithium cell charging of charge sheet controls the charging of device KZ management lithium battery LTB, after lithium battery LTB charging terminates,
By controlling relay K, protect lithium battery LTB.
The connection of wireless lithium battery charger various piece is as follows:
1) transmission of electricity plate is connected without wire with charge sheet.
2) in transmission of electricity plate, the input of amplifying circuit 1 is connected with plane inductive coil L2, and the outfan of amplifying circuit 1 is with flat
Face inductance coil L1 connects.
3), in charge sheet, decompression capacitor C4, resonant capacitance C3, plane inductive coil L3 and plane inductive coil L4 connect；
Other attached components and parts are pressed Fig. 4 and are connected.
The relative position of wireless lithium battery charger various piece is as follows:
1) transmission of electricity plate can be with relative movement with charge sheet, mutually without constraint.
2), in transmission of electricity plate, amplifying circuit 1 is placed on the one side of one piece of metal plate, plane inductive coil L1 and plane inductor wire
Circle L2 is placed on the another side of same metal plate；Plane inductive coil L1 and plane inductive coil L2 is positioned some distance,
Non-overlapping, the side of soft magnetic ferrite sheet is fixed on metal plate；Metal plate, amplifying circuit 1, plane inductive coil
L1 and plane inductive coil L2 forms an entirety.
3), in charge sheet, attached components and parts are placed on the one side of one piece of non-metal flat plate, plane inductive coil L3 and planar inductor
Coil L4 is placed on the another side of same non-metal flat plate, and the side of soft magnetic ferrite sheet is fixed on non-metal flat plate, apart
Certain distance is placed, non-overlapping, forms an entirety.
The relation of wireless lithium battery charger various piece is as follows:
1), when transmission of electricity plate is in holding state, wireless lithium battery charger is also at holding state, and charge sheet can not receive electric energy and be
Lithium cell charging；When wireless lithium battery charger is in oscillatory regime, transmission of electricity plate and charge sheet as the part of oscillation circuit,
Transmission of electricity plate is in oscillatory regime, and it is lithium cell charging that charge sheet receives electric energy.
2) the electromagnetic coupled relation between transmission of electricity plate and charge sheet, is mainly manifested in plane inductive coil L2 and the charging of transmission of electricity plate
Electromagnetism between plane inductive coil L3 and the plane inductive coil L1 and the plane inductive coil L4 of charge sheet of transmission of electricity plate of sheet
Coupling.Exist between plane inductive coil L2 and plane inductive coil L3 and plane inductive coil L1 and plane inductive coil L4
During strong electromagnetic coupled, between transmission of electricity plate and charge sheet, there is strong electromagnetic coupled；Plane inductive coil L2 and plane inductive coil
When there is weak electromagnetic coupled between L3 and plane inductive coil L1 and plane inductive coil L4, deposit between transmission of electricity plate and charge sheet
In weak electromagnetic coupled；Plane inductive coil L2 and plane inductive coil L4 and plane inductive coil L3 and plane inductive coil
Electromagnetic coupled between L1 is small and weak；Electromagnetic coupled between plane inductive coil L3 and plane inductive coil L4 is to wireless lithium battery
Charger impact is less.
3) by the resonant capacitance C2 that transmission of electricity plate is attached, transmission of electricity plate has fixing frequency of oscillation F1.
4) by the resonant capacitance C3 that charge sheet is attached, charge sheet has fixing resonant frequency F2.
5) resonant frequency F2 of charge sheet produces resonance close to resonant frequency F1 of transmission of electricity plate, transmission of electricity plate and charge sheet.
6), in charge sheet, the low-voltage AC at decompression capacitor C4 two ends is through commutation diode D2, commutation diode D3, rectification
Diode D4, commutation diode D5 are rectified into direct current, after filtering electric capacity C5 filtering, lithium cell charging control device KZ
Charge to lithium battery LTB, after charging terminates, relay K adhesive.
Electromagnetic coupled wireless power transmission device adjustment method is as follows:
1), when transmission of electricity plate and charge sheet do not exist strong electromagnetic coupled, plane inductive coil L1 and plane are shielded with metal plate
Inductance coil L2 electromagnetic coupled each other so that plane inductive coil L1 and plane inductive coil L2 electromagnetism each other
Coupling faint, the transmission of electricity plate being made up of amplifying circuit 1, plane inductive coil L1 and plane inductive coil L2 does not reaches generation and shakes
The feedback amplitude swung, transmission of electricity plate is unsatisfactory for oscillation amplitude condition, is in holding state.
2), when transmission of electricity plate and charge sheet exist strong electromagnetic coupled, plane inductive coil L1 and plane inductive coil L4 peace is strengthened
The electromagnetic coupled of face inductance coil L2 and plane inductive coil L3 so that plane inductive coil L1, plane inductive coil L2, flat
The circuit of face inductance coil L3, plane inductive coil L4 and amplifying circuit 1 composition meets the feedback amplitude of positive feedback oscillating circuit
Condition；Connection end by exchange plane inductance coil L3 and plane inductive coil L4 so that plane inductive coil L1, plane
The circuit of inductance coil L2, plane inductive coil L3, plane inductive coil L4 and amplifying circuit 1 composition meets positive feedback vibration
The phase condition of circuit；Wireless lithium battery charger produces positive feedback vibration, for the lithium cell charging that charge sheet is attached.
Wireless lithium battery charger two kinds of duties of existence: charged state and holding state.
During charged state, transmit electricity the amplifying circuit 1 of plate, plane inductive coil L1 and plane inductive coil L2, adds charge sheet
Plane inductive coil L3 and plane inductive coil L4, forms a complete positive feedback oscillating circuit, produces vibration, in blood pressure lowering
Electric capacity C4 two ends produce low-voltage AC, through commutation diode D2, commutation diode D3, commutation diode D4, rectification two
Pole pipe D5 is rectified into direct current, after filtering electric capacity C5 filtering, lithium cell charging control device KZ and charge to lithium battery LTB；
During holding state, transmission of electricity plate is not affected by charge sheet, and metal plate shields plane inductive coil L1 and plane inductive coil L2
Electromagnetic coupled each other so that plane inductive coil L1 and plane inductive coil L2 electromagnetic coupled each other are faint,
The transmission of electricity plate being made up of amplifying circuit 1, plane inductive coil L1 and plane inductive coil L2 does not reaches the feedback width producing vibration
Degree, transmission of electricity plate is unsatisfactory for oscillation amplitude condition, is in holding state, is not lithium cell charging, only consumes small electric energy, with
Time can be converted into positive feedback vibration.
The using method of wireless lithium battery charger is through the strong and weak control of charge sheet and transmission of electricity plate electromagnetic coupled each other
Transmission of electricity plate so that wireless lithium battery charger is changed in two kinds of duties.
The using method of wireless lithium battery charger has displacement-controlled method or and two kinds of methods of on-off control method.
(1) displacement-controlled method of wireless lithium battery charger: by charge sheet with or transmission of electricity plate relative position near and away from,
Control the duty of wireless lithium battery charger.
When charge sheet is sufficiently far from transmission of electricity plate, there is not strong electromagnetic coupled in charge sheet and transmission of electricity plate, transmission of electricity plate is not by charge sheet
Impact, metal plate shields plane inductive coil L1 and plane inductive coil L2 electromagnetic coupled each other, transmission of electricity plate
Plane inductive coil L2 and plane inductive coil L1 electromagnetic coupled each other is faint, and transmission of electricity plate is unsatisfactory for producing the width of vibration
Degree condition, is in holding state, and the decompression capacitor C4 two ends no-voltage of charge sheet, is not lithium cell charging.
When the charge sheet of wireless lithium battery charger is sufficiently close together transmission of electricity plate so that the plane inductive coil L1 of transmission of electricity plate and charging
The plane inductive coil L4 of sheet, the plane inductive coil L2 of transmission of electricity plate is sufficiently close together with the plane inductive coil L3 of charge sheet, flat
Face inductance coil L1 and plane inductive coil L4 and plane inductive coil L2 and plane inductive coil L3 produces strong electromagnetic coupled,
Form amplifying circuit 1, plane inductive coil L1, plane inductive coil L4, plane inductive coil L3 and plane inductive coil L2
Positive feedback oscillating circuit, meet produce vibration phase and amplitude condition, produce positive feedback vibration, decompression capacitor C4 two ends
Low-voltage AC is rectified into direct current through commutation diode D2, commutation diode D2, commutation diode D2, commutation diode D2,
Being filtered by filter capacitor C5, lithium cell charging controls device KZ and charges to lithium battery LTB, and wireless lithium battery charger is in and fills
Electricity condition.
(2) the on-off control method of wireless lithium battery charger: by the contact switch shorted planar electricity of the attached relay K of charge sheet
The two ends of sense coil L4, allow transmission of electricity plate be in holding state；By the contact switch open circuit plane inductive coil of attached relay K
The two ends of L4, allow transmission of electricity plate be in charged state.
When the two ends of the contact switch shorted planar inductance coil L4 of the attached relay K of charge sheet, by amplifying circuit 1, plane
Inductance coil L1, plane inductive coil L2, plane inductive coil L3 and the positive feedback oscillating circuit of plane inductive coil L4 composition
Feedback circuit be interrupted, transmission of electricity plate do not affected by charge sheet, metal plate shields plane inductive coil L1 and plane inductor wire
Circle L2 electromagnetic coupled each other, the plane inductive coil L1 and plane inductive coil L2 of transmission of electricity plate electromagnetism coupling each other
Closing faint, transmission of electricity plate is unsatisfactory for producing the amplitude conditions of vibration, is in holding state, and the decompression capacitor C4 two ends of charge sheet are without electricity
Pressure, is not lithium cell charging.
When the two ends of the contact switch open circuit plane inductive coil L4 of the attached relay K of charge sheet, the planar inductor line of transmission of electricity plate
The plane inductive coil L1 of circle L2 and the plane inductive coil L3 of charge sheet and transmission of electricity plate and the plane inductive coil L4 of charge sheet
Produce strong electromagnetic coupled, form amplifying circuit 1, plane inductive coil L2, plane inductive coil L4, plane inductive coil L3
With the positive feedback oscillating circuit of plane inductive coil L1, meet the phase and amplitude condition producing vibration, produce positive feedback vibration,
The low-voltage AC at decompression capacitor C4 two ends is through commutation diode D2, commutation diode D2, commutation diode D2, rectification two
Pole pipe D2 is rectified into direct current, after filtering electric capacity C5 filtering, and lithium cell charging controls device KZ and charges to lithium battery LTB, nothing
Line lithium battery charger is in charged state.
After lithium battery LTB is fully charged, lithium cell charging control device KZ output electric current, the contact switch of attracting electric relay K,
The two ends of shorted planar inductance coil L4, transmission of electricity plate is not affected by charge sheet, the plane inductive coil L1 of transmission of electricity plate and plane electricity
Sense coil L2 electromagnetic coupled each other is faint, and transmission of electricity plate is unsatisfactory for producing the amplitude conditions of vibration, is in holding state, fills
The decompression capacitor C4 two ends no-voltage of electricity sheet, is not lithium cell charging.
This wireless lithium battery charger can apply to the small electric apparatus such as mobile phone, flat board, and advantage is: can as required, by
Charge sheet and the charging of the relative position control wireless lithium battery charger of transmission of electricity plate, proceed to holding state after being full of automatically, need not
Extra intervention, removes the communication protocol between charge sheet and transmission of electricity plate completely, improves self adaptation degree, simply, small and exquisite, honest and clean
Valency, reliably, as long as size and resonant frequency are close, the product of different manufacturers can be the most general, compatible high.
It is found that in above three embodiment, although transmission of electricity purposes is different, but transmission of electricity plate can be just the same, with one
Individual general transmission of electricity plate is the various equipment wireless power transmission needing electric energy.
Claims (8)
1. an electromagnetic coupled wireless power transmission device, it is characterised in that electromagnetic coupled wireless power transmission device is mainly by basis oscillating circuit and control
Network two parts processed form, and basis oscillating circuit is connected without wire with controlling network, basic oscillating circuit mainly by amplifying circuit 1,
Input coil 2 and output winding 3 form, and the input of amplifying circuit 1 is connected with input coil 2, the output of amplifying circuit 1
End is connected with output winding 3, controls network and is mainly formed by receiving coil 4 and feedback coil 5 and be connected with each other, basis vibration
The feedback of the output winding 3 of the circuit input coil 2 with the receiving coil 4 and basis oscillating circuit controlling network and control network
Coil 5 can be sufficiently close together or be sufficiently close together always.
2. according to the basic oscillating circuit described in claim 1 and control network, it is characterised in that basis oscillating circuit and control network packet
Containing accessory power or and wire or and load or and electric capacity or and frequency-selective network or and fixed amplitude circuit or and switch or and integrated circuit or
With components and parts such as diodes.
3. according to the basic oscillating circuit described in claim 2, it is characterised in that basis oscillating circuit is by attached electric capacity or and frequency-selecting net
Network, has fixing frequency of oscillation F1.
4., according to the control network described in claim 2, it is characterised in that control network and pass through attached electric capacity, there is fixing resonance frequency
Rate F2.
5. according to the basic oscillating circuit described in claim 3 and the control network described in claim 4, it is characterised in that basis vibration
Resonant frequency F2 of frequency of oscillation F1 of circuit and control network is close and produces resonance.
6. an adjustment method for electromagnetic coupled wireless power transmission device, step is:
1) when basis oscillating circuit with control network there is not strong electromagnetic coupled time, allow basis oscillating circuit by the method for electromagnetic shielding
Input coil 2 is faint with output winding 3 electromagnetic coupled each other, or and exchange basis oscillating circuit input coil 2 or
The connection end of output winding 3, allows input coil 2, output winding 3 and amplifying circuit 1 form weak negative-feedback circuit, basis
Oscillating circuit is in holding state.
2) when basis oscillating circuit exists strong electromagnetic coupled with control network, receiving coil 4 and the feedback of network are controlled by exchange
The connection end of coil 5, allows output winding 3, receiving coil 4, feedback coil 5, input coil 2 and amplifying circuit 1 form
Circuit meets the phase and amplitude condition producing positive feedback vibration, and electromagnetic coupled wireless power transmission device is in oscillatory regime, for load
Electric energy is provided.
7. a using method for electromagnetic coupled wireless power transmission device, step is:
1), when need not transmission of electricity, the mobile network that controls, away from basis oscillating circuit, allows electromagnetic coupled wireless power transmission device be in holding state,
Electric energy is not provided for load；
2), when needing transmission of electricity, the mobile network that controls, near basis oscillating circuit, allows electromagnetic coupled wireless power transmission device be in oscillatory regime,
Electric energy is provided for load.
8. a using method for electromagnetic coupled wireless power transmission device, premise is to control network accessory switch, and basis oscillating circuit
The output winding 3 of input coil 2 and the feedback coil 5 of control network and basis oscillating circuit and the receiving coil 4 controlling network
Close, step is:
1), when need not transmission of electricity, the connection between receiving coil 4 and feedback coil 5 is disconnected by controlling network accessory switch, or and short
Road receiving coil 4 or the two ends with feedback coil 5 so that electromagnetic coupled wireless power transmission device is in holding state, for load
Electric energy is provided；
2) when needing transmission of electricity, by controlling the connection between network accessory switch Guan Bi receiving coil 4 and feedback coil 5, or and open circuit
Receiving coil 4 or the two ends with feedback coil 5 so that electromagnetic coupled wireless power transmission device is in oscillatory regime, provide for load
Electric energy.
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| CN201610457639.1A CN106026419A (en) | 2016-06-22 | 2016-06-22 | Electromagnetic coupling wireless power transmission apparatus and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106878853A (en) * | 2017-03-22 | 2017-06-20 | 浙江大学 | Charging bluetooth earphone is exempted from based on magnetic coupling wireless power transmission technology |
| CN107688202A (en) * | 2017-06-01 | 2018-02-13 | 杨培应 | Quick machine a kind ofly |
| CN113206553A (en) * | 2021-05-20 | 2021-08-03 | 上海交通大学 | Wireless power transmission system and transmitting circuit and receiving circuit thereof |
-
2016
- 2016-06-22 CN CN201610457639.1A patent/CN106026419A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106878853A (en) * | 2017-03-22 | 2017-06-20 | 浙江大学 | Charging bluetooth earphone is exempted from based on magnetic coupling wireless power transmission technology |
| CN107688202A (en) * | 2017-06-01 | 2018-02-13 | 杨培应 | Quick machine a kind ofly |
| CN113206553A (en) * | 2021-05-20 | 2021-08-03 | 上海交通大学 | Wireless power transmission system and transmitting circuit and receiving circuit thereof |
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