CN206283296U - Wireless charging circuit and device - Google Patents
Wireless charging circuit and device Download PDFInfo
- Publication number
- CN206283296U CN206283296U CN201621178587.6U CN201621178587U CN206283296U CN 206283296 U CN206283296 U CN 206283296U CN 201621178587 U CN201621178587 U CN 201621178587U CN 206283296 U CN206283296 U CN 206283296U
- Authority
- CN
- China
- Prior art keywords
- circuit
- wireless charging
- magnetic core
- coil
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000001914 filtration Methods 0.000 claims abstract description 31
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 17
- 229910000529 magnetic ferrite Inorganic materials 0.000 claims description 37
- 229910000859 α-Fe Inorganic materials 0.000 claims description 37
- 230000004308 accommodation Effects 0.000 claims description 17
- 230000001939 inductive effect Effects 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound 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[Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- 206010010254 Concussion Diseases 0.000 claims description 8
- 230000005674 electromagnetic induction Effects 0.000 claims description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Chemical compound 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Abstract
A kind of wireless charging circuit, including electric energy transfer module, electric energy receiver module and cylinder magnetic core, electric energy transfer module includes power safety and electromagnetic interference filter circuit, capacitance-resistance voltage reduction circuit, full bridge rectifier, DC filtering circuit, high-frequency self-excitation oscillator-amplification circuit and transmitting coil, and power safety is additionally operable to be connected with external ac power source with electromagnetic interference filter circuit；Electric energy receiver module includes receiving coil, induced signal current rectifying and wave filtering circuit, direct current regulation circuit and battery charger, and battery charger is additionally operable to be connected with external cell.A kind of wireless charging device, including transfer circuit plate, circuit board for receiving, bottom, upper lid and wireless charging circuit.Above-mentioned wireless charging circuit and device, with circuit element is few, circuit simple, reliable operation, it is with low cost the features such as, be suitable for combination application in terms of small-sized battery applications product charging.
Description
Technical field
The utility model is related to the technical field of electromagnetic induction charged, more particularly to a kind of wireless charging circuit and dress
Put.
Background technology
Wireless charging technology, i.e. Wireless charging technology, refer to that the device with battery need not
By means of electric lead, using electromagnetic wave induction principle or other related alternating current impression technologies, used in transmitting terminal and receiving terminal
Corresponding equipment produces the AC signal of sensing come the technology for being charged to send and receive, and comes from wireless power conveying
Technology.The research of wireless charging technology, comes from the 1830's, and Michael-faraday has found electromagnetic induction phenomenon, i.e. magnetic flux
Amount change produces induced electromotive force, so as to produce electric current in electric wire.But earliest wireless power transmission thought is Ni Gula-spy
Wireless power transmission conception and wireless power transmission experiment that Si La (Nikola Tesla) is proposed in the nineties in 19th century, thus someone
The referred to as father of wireless power transmission.
From for specific know-why and solution, current wireless charging technology mainly has induction, magnetic common
Shake formula, radio waves type, four kinds of basic modes of field coupling formula.This several technology be respectively suitable for short range, medium or short range with it is long-range
Electric power is transmitted.
Currently most ripe, most common is induction.Its cardinal principle is to utilize electromagnetic induction principle, similar to change
Depressor, respectively has a coil in transmitting terminal and receiving terminal, the alternating current of certain frequency is led on primary coil, because electromagnetic induction exists
Certain electric current is produced in secondary coil, so as to energy is transferred into receiving terminal from transmission end.Advantage is charge efficiency high, shortcoming
It is short charging distance, it is high to putting position requirement.
Magnetic resonance type is also referred to as near field resonant mode, by energy dispensing device, and energy acceptance device composition, when two devices
Be adjusted to same frequency, in other words in a specific frequency resonate, they can just exchange mutual energy, its principle with
The resonance principle of sound is identical, the coil of the identical vibration frequency being arranged in magnetic field, can be powered to another from one, technology
Difficult point is miniaturization relatively difficult to achieve and high efficiency.Advantage be charging distance farther out, charge power is big, has the disadvantage charge efficiency not
Height, security is low, insalubrity.
Radio waves type, general principle similar to early application crystal receiver, mainly by microwave launcher and micro-
Wave receiving device is constituted.Typically the microwave power transmission system of Blang's sixties in 20th century (William C.Brown), whole to pass
Defeated system includes microwave source, transmitting antenna, the part of reception antenna 3；Have magnetron in microwave source, can voltage input in 2.45GHz frequently
The certain power of section output；Transmitting antenna is 64 antenna arrays in gap, and reception antenna possesses 25% collection and conversion efficiency.
Advantage be it is far distance automatic charge at any time, have the disadvantage that charge efficiency is low, transimission power is small, and the charging interval is long.
The induction field that field coupling formula is produced using two groups of asymmetric dipoles by vertically coupling come
Transmission electric energy, its general principle is that electric energy is transferred into receiving terminal from transmitting terminal by electric field.Advantage is charge efficiency high, heating
It is low, it is less demanding to position, have the disadvantage that volume is larger, power is not high.
With regard at present for, the wireless charging scheme based on QI ﹑ Power Mat ﹑ A4WP standards constantly development in, especially
It is that the wireless charging scheme based on QI standards occupies certain market in terms of mobile phone wireless charging, scope is also continuous
In expansion.But the charging system of this kind of wireless charging scheme composition is present using application-specific integrated circuit (integrated circuit), and element is difficult purchase
Buy, the characteristics of high cost, apply in place of Shortcomings on the low power consumption electronic product for requiring low cost.
Utility model content
Based on this, it is necessary to for the technical problem for how reducing production cost, there is provided a kind of wireless charging circuit and dress
Put.Other technologies scheme also solve how to reduce circuit standby energy consumption, how to improve circuit stability, how to reduce circuit answer
Polygamy, how to improve charge efficiency and how to expand the technical problems such as the versatility of circuit.
A kind of wireless charging circuit, including electric energy transfer module and electric energy receiver module, the electric energy transfer module include
It is sequentially connected：Power safety and electromagnetic interference filter circuit, capacitance-resistance voltage reduction circuit, full bridge rectifier, DC filtering circuit,
High-frequency self-excitation oscillator-amplification circuit and transmitting coil, the power safety are additionally operable to be handed over outside with electromagnetic interference filter circuit
Stream power supply connection；The electric energy receiver module includes what is be sequentially connected：Receiving coil, induced signal current rectifying and wave filtering circuit, direct current
Mu balanced circuit and battery charger, the battery charger are additionally operable to be connected with external cell；The wireless charging electricity
Road also includes cylinder magnetic core, and the cylinder magnetic core is arranged in the transmitting coil and the receiving coil so that the emission lines
Circle is with the receiving coil by electromagnetic induction wireless connection, the cylinder magnetic core, the transmitting coil and the reception line
The central axis of circle is on the same line.
Wherein in one embodiment, the full bridge rectifier includes the full-bridge being made up of four diodes or four
The input of diode package silicon stack together, the full-bridge or the silicon stack connects with the output end of the capacitance-resistance voltage reduction circuit
Connect, the output end of the full-bridge or the silicon stack is connected with the input of the DC filtering circuit.
Wherein in one embodiment, the DC filtering circuit includes high-voltage electrolytic capacitor, the high-voltage electrolytic capacitor
One end be connected with the output end of the full bridge rectifier, the other end of the high-voltage electrolytic capacitor shakes with the high-frequency self-excitation
Swing the input connection of amplifying circuit.
Wherein in one embodiment, the high-frequency self-excitation oscillator-amplification circuit is produced using capacitance three-point type concussion principle
Sine wave signal of the frequency in 50~100kHz.
A kind of wireless charging device, including transfer circuit plate, circuit board for receiving, bottom, upper lid and nothing as described above
Line charging circuit, wherein, the cylinder magnetic core is ferrite cylinder magnetic core；The power safety and electromagnetic interference filter circuit,
Electricity is amplified in the vibration of the capacitance-resistance voltage reduction circuit, the full bridge rectifier, the DC filtering circuit and the high-frequency self-excitation
Road is arranged on the transfer circuit plate, and the transmitting coil is arranged in the bottom, to form the first hollow cylinder
Structure；The induced signal current rectifying and wave filtering circuit, the direct current regulation circuit and the battery charger are arranged at described
On circuit board for receiving, the receiving coil is arranged in the upper lid, to form the second hollow cylindrical structure；The iron oxygen
Body cylinder magnetic core is arranged in first cylindrical structure and second cylindrical structure, the ferrite cylinder magnetic core,
The central axis of first cylindrical structure and second cylindrical structure on the same line, and the transmitting coil
There is predetermined inductive gap between the receiving coil.
Wherein in one embodiment, the predetermined inductive gap is less than 5 millimeters.
Wherein in one embodiment, the bottom includes lid and cylinder, and the lid is the hollow circle of a side opening
Column structure, the lid has the first accommodation space, and the bottom center region of the lid offers perforation, the emission lines
Circle is contained in first accommodation space；The cylinder is the hollow circular cylinder structure of both-side opening, and one end of the cylinder connects
The threaded end is connected to so that the cylinder connects first accommodation space, the cylinder has first passage, the iron oxygen
Body cylinder magnetic core is arranged in the perforation and the first passage so that the transmitting coil is set in the ferrite cylinder
On magnetic core.
Wherein in one embodiment, the upper lid is the hollow circular cylinder structure of a side opening, and the upper lid has the
Two accommodation spaces, the receiving coil is housed with second accommodation space, and the bottom center region of the upper lid is offered
Through hole, the ferrite cylinder magnetic core is arranged in the through hole so that the receiving coil is set in the ferrite cylinder magnetic core
On.
Wherein in one embodiment, the perforation, the first passage, the through hole and the ferrite cylinder magnetic
The axis of core is located along the same line.
Wherein in one embodiment, the radius of the perforation, the radius of the first passage, the radius of the through hole,
The external diameter of the radius of the transmitting coil, the radius of the reception line and the ferrite cylinder magnetic core is equal.
Above-mentioned wireless charging circuit and device, are connected by power safety and electromagnetic interference filter circuit with external ac power source
Connect and for example access mains supply, AC power by obtaining galvanic current source after capacitance-resistance voltage reduction circuit, full bridge rectifier,
For high-frequency self-excitation oscillator-amplification circuit provides stable DC voltage source, so that high-frequency self-excitation oscillator-amplification circuit can steadily rise
Shake, and reach the concussion state of stabilization, the electric current of alternation is now produced in transmitting coil, so as to produce the magnetic field of alternation, alternation
Magnetic field inductively and by induced signal current rectifying and wave filtering circuit, direct current regulation circuit entered by receiving coil by cylinder magnetic core
Row rectification, filtering, voltage stabilizing, the charging voltage stablized charge to rechargeable battery, and are being filled by battery charger
After battery is full of, charging circuit is turned off, protected with to rechargeable battery；Understand that the wireless charging circuit and device have electricity
Circuit component is few, circuit is simple, reliable operation, it is with low cost the features such as, be very suitable for combination application in small-sized battery applications
Product charging aspect, is the splendid scheme for setting up low cost low-power consumption high efficiency low-power wireless charging application product.
Brief description of the drawings
Fig. 1 is the circuit module schematic diagram of wireless charging circuit in one embodiment；
Fig. 2 is the structural representation of wireless charging device in one embodiment；
Fig. 3 is the fractionation structural representation of the first cylindrical structure in one embodiment；
Fig. 4 is the structural representation of the second cylindrical structure in one embodiment；
Fig. 5 is the positional structure schematic diagram of transmitting coil and receiving coil in one embodiment；
Fig. 6 is the cross section structure diagram of the position of transmitting coil and receiving coil in one embodiment.
Specific embodiment
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings to this
The specific embodiment of utility model is described in detail.Elaborate many details in order to abundant in the following description
Understand the utility model.But the utility model can be implemented with being much different from other manner described here, this area
Technical staff can do similar improvement in the case of without prejudice to the utility model intension, therefore the utility model does not receive following public affairs
The limitation of the specific embodiment opened.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward ",
The orientation or position relationship of the instruction such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " are based on shown in the drawings
Orientation or position relationship, are for only for ease of description the utility model and simplify description, rather than the dress for indicating or implying meaning
Put or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model
Limitation.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In description of the present utility model, " multiple " is meant that at least two, such as two
It is individual, three etc., unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be
Mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal or two interaction relationships of element, unless otherwise clearly restriction.For the common skill of this area
For art personnel, concrete meaning of the above-mentioned term in the utility model can be as the case may be understood.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score
Can be the first and second feature directly contacts, or the first and second features are by intermediary mediate contact.And, first is special
Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.
It should be noted that when element is referred to as " being fixed on " or " being arranged at " another element, it can be directly another
On one element or can also there is element placed in the middle.When an element is considered as " connection " another element, it can be with
It is directly to another element or may be simultaneously present centering elements.Term as used herein " vertical ", " level
", " on ", D score, "left", "right" and similar statement for illustrative purposes only, it is unique implementation to be not offered as
Mode.
Fig. 1 is referred to, it is the circuit module schematic diagram of wireless charging circuit 10 in one embodiment, a kind of wireless charging
Circuit 10 includes electric energy transfer module 110 and electric energy receiver module 120.Electric energy transfer module 110 and electric energy receiver module 120 it
Between using electromagnetic induction principle of induction connect.
Electric energy transfer module 110 includes what is be sequentially connected：Power safety and electromagnetic interference filter circuit 111, resistance-capacitance depressurization
Circuit 112, full bridge rectifier 113, DC filtering circuit 114, high-frequency self-excitation oscillator-amplification circuit 115 and transmitting coil
116.Power safety is additionally operable to be connected with external ac power source with electromagnetic interference filter circuit 111.That is, AC power from
Power safety is input into the input end of electromagnetic interference filter circuit 111, with to the input ac power of electric energy transfer module 110.
Electric energy receiver module 120 includes：Receiving coil 121, induced signal current rectifying and wave filtering circuit 122, direct current regulation circuit
123 and battery charger 124.For example, receiving coil 121, induced signal current rectifying and wave filtering circuit 122, direct current regulation circuit
123 and battery charger 124 be sequentially connected.For example, battery charger 124 is additionally operable to be connected with external cell.Also
It is to say, battery charger 124 exports dc source to external cell.
Wireless charging circuit also includes cylinder magnetic core, cylinder magnetic core be arranged in transmitting coil 116 and receiving coil 121 with
Make transmitting coil 116 with receiving coil 121 by electromagnetic induction wireless connection, cylinder magnetic core, transmitting coil 116 and reception line
The central axis of circle 121 is on the same line.That is, electric energy transmitting portions main element comprising cylinder shape magnetic core and
One primary coil, primary coil completes the transmission of electric energy by the coupling with secondary coil.
Above-mentioned wireless charging circuit 10, is connected by power safety and electromagnetic interference filter circuit 111 with external ac power source
Connect and for example access mains supply, AC power is straight by what is stablized after capacitance-resistance voltage reduction circuit 112, full bridge rectifier 113
Stream power supply, is that high-frequency self-excitation oscillator-amplification circuit 115 provides stable DC voltage source, so that high-frequency self-excitation oscillator-amplification circuit
115 can stable vibration start, and reach stabilization concussion state, now in transmitting coil 116 produce alternation electric current, so as to produce
The magnetic field of alternation, the magnetic field of alternation passes through cylinder magnetic core by receiving coil 121 inductively and by induced signal rectifying and wave-filtering
Circuit 122, direct current regulation circuit 123 carry out rectification, filtering, voltage stabilizing, and the charging voltage stablized is filled to rechargeable battery
Electricity, and by battery charger 124 after rechargeable battery is full of, charging circuit is turned off, protected with to rechargeable battery；Can
Know the wireless charging circuit and device and have that circuit element is few, circuit simple, reliable operation, it is with low cost the features such as, fit very much
It is to set up low cost low-power consumption high efficiency low-power wireless to fill together in combination application in terms of small-sized battery applications product charging
The splendid scheme of electric application product.
In one embodiment, power safety includes the safeties and the electromagnetic interference that are arranged in series with electromagnetic interference filter circuit
Filter circuit.Wherein, electromagnetic interference filter circuit is EMI (Electromagnetic Interference abbreviation EMI) filtering
Circuit.For example, safeties use fuse, electromagnetic interference filter circuit uses filter capacitor.Fuse and filter capacitor
Model can be set according to side circuit demand.It is appreciated that power safety filters the high frequency of extraneous power network with EMI filter circuit
Influence of the pulse to power supply, while also functioning to prevent the effect of own power source electromagnetic interference to external world.
For example, input of the AC power from power safety and electromagnetic interference filter circuit.In the present embodiment, AC power
It refer to civil power.For example, civil power is included but is not limited only to Chinese Industrial Standards (CIS) civil power AC220V 50Hz, other international city's electrical specifications
Also can, with cause repairing change the system subelement parameter in the case of can also obtain suitable charging performance.For example, power supply is protected
Realized by power plug wire with the connection of civil power with the input of electromagnetic interference filter circuit danger.
For example, full bridge rectifier 113 includes the full-bridge being made up of four diodes.For example, the input of full-bridge and resistance
Hold the output end connection of reduction voltage circuit 112.For example, the output end of full-bridge is connected with the input of DC filtering circuit 114.Again
Such as, full bridge rectifier 113 includes four diode packages silicon stack together.For example, the input and resistance-capacitance depressurization of silicon stack
The output end connection of circuit 112.For example, the output end of silicon stack is connected with the input of DC filtering circuit 114.
For example, DC filtering circuit 114 includes high-voltage electrolytic capacitor, one end of high-voltage electrolytic capacitor and full bridge rectifier
113 output end connection, the other end of high-voltage electrolytic capacitor is connected with the input of high-frequency self-excitation oscillator-amplification circuit 115.
That is, resistance-capacitance depressurization, rectification, filter circuit are partially completed the conversion of AC (exchange) to DC (direct current), produce
More stable dc source is powered to oscillating circuit below.Rectification circuit use four diodes, also can select incited somebody to action
Four diode packages silicon stack together, filter element includes a high-voltage electrolytic capacitor.
For example, high-frequency self-excitation oscillator-amplification circuit 115 using capacitance three-point type concussion principle produce frequency 50~
The sine wave signal of 100kHz.It is, high frequency oscillation part is using common capacitance three-point type concussion principle, the sine of generation
Ripple signal frequency can be designed in the range of 50~100kHz, so that whole circuit structure is easy in the way of friendship low cost
Realize.
It should be noted that in electric energy receiver module, electric signal rectifying and wave-filtering part is the rectification of secondary AC signal elder generation
Filter again afterwards, it is final to obtain more stable DC signal.For example, voltage stabilization part after filtering obtain DC signal again
Doing voltage stabilizing treatment can be supplied directly to the power supply signal of battery charging to obtain.For example, battery charges and protection circuit is by being filled
Battery and protection circuit are constituted, and the effect of protection circuit is to prevent battery overcharge, overdischarge, excessively stream and short circuit, it is ensured that electricity
Pond does not predispose to damage in life cycle.Battery can be the chargeable electricity such as lithium battery, polymer battery, or even Ni-MH battery
Pond.
In order to improve coupling effect, for example, transmit coil respectively connects a compensating electric capacity with receiving coil, with by compensating electricity
Hold and cause that transmit coil is identical with the resonant frequency of receiving coil, so as to meet the resonant frequency phase of transmit coil and receiving coil
Same actual circuit needs.
Fig. 2 is referred to, it is the structural representation of wireless charging device 20 in one embodiment, a kind of wireless charging device
20 include transfer circuit plate 210, circuit board for receiving 220, bottom 230, upper lid 240 and above-mentioned wireless charging circuit 10.Knot
Fig. 1 and Fig. 2 is closed, for example, power safety and electromagnetic interference filter circuit 111, capacitance-resistance voltage reduction circuit 112, full bridge rectifier
113rd, DC filtering circuit 114 and high-frequency self-excitation oscillator-amplification circuit 115 are arranged on transfer circuit plate 210.Induced signal
Current rectifying and wave filtering circuit 122, direct current regulation circuit 123 and battery charger 124 are arranged on circuit board for receiving 220.
With reference to Fig. 2, Fig. 3 and Fig. 4, for example, transmitting coil 116 is arranged in bottom 230, to form the first hollow circle
Column structure 300.Receiving coil 121 is arranged in lid 240, to form the second hollow cylindrical structure 400.Ferrite is justified
Post magnetic core 250 is arranged in the first cylindrical structure 300 and the second cylindrical structure 400, ferrite cylinder magnetic core 250, first
The central axis of the cylindrical structure 400 of cylindrical structure 300 and second on the same line, and transmitting coil 116 with receive
There is predetermined inductive gap between coil 121.For example, predetermined inductive gap is less than 5 millimeters.
Above-mentioned wireless charging device 20, is connected by power safety and electromagnetic interference filter circuit 111 with external ac power source
Connect and for example access mains supply, AC power is straight by what is stablized after capacitance-resistance voltage reduction circuit 112, full bridge rectifier 113
Stream power supply, is that high-frequency self-excitation oscillator-amplification circuit 115 provides stable DC voltage source, so that high-frequency self-excitation oscillator-amplification circuit
115 can stable vibration start, and reach stabilization concussion state, now in transmitting coil 116 produce alternation electric current, so as to produce
The magnetic field of alternation, the magnetic field of alternation passes through cylinder magnetic core by receiving coil 121 inductively and by induced signal rectifying and wave-filtering
Circuit 122, direct current regulation circuit 123 carry out rectification, filtering, voltage stabilizing, and the charging voltage stablized is filled to rechargeable battery
Electricity, and by battery charger 124 after rechargeable battery is full of, charging circuit is turned off, protected with to rechargeable battery；Can
Know the wireless charging circuit and device and have that circuit element is few, circuit simple, reliable operation, it is with low cost the features such as, fit very much
It is to set up low cost low-power consumption high efficiency low-power wireless to fill together in combination application in terms of small-sized battery applications product charging
The splendid scheme of electric application product.
As can be known from Fig. 2, shown power safety, resistance-capacitance depressurization, rectification, filter circuit, high frequency oscillation these functional modules
Partial element is mounted on one piece of circuit board, and two leading-out terminals on the primary coil in electric energy transfer module pass through
It is solder-connected on this block circuit board, the terminals of the both threads on plug cord are welded direct to two pads on circuit board,
By circuit board group into whole electric energy transmission functional block by plug cord from civil power obtain power supply.Electric energy transfer module part is independent
It is encapsulated with the plastic shell of special design, the connection with civil power may be selected power plug wire or directly design power supply in shell
Inserted sheet (optional) connects the purpose of power supply to reach.Equipment is electrically charged in addition, be designed with the shell of this module and can carried
Platform, is easy to perform charging being electrically charged equipment and be placed on this platform.
Electric energy receiver module part is directly designed at needing inside the electronic product of charging.During structure mounting design
It should be noted that：The central axis of primary coil, the central axis of secondary coil all should be with the central axis of cylinder shape magnetic core
Overlap, primary coil can not be too far away from the spacing distance of secondary coil, is advisable with below 5mm, the smaller the better, can so protect
Demonstrate,prove preferable charging effect.Structure design can stablize when taking out operation and charging it must also be taken into account that performed when being easy to charge and installed
Place, for specific applicable product, or even need to add waterproofing design enable to reach expected classification of waterproof.
Fig. 3 is referred to, it is the fractionation structural representation of the first cylindrical structure 300 in one embodiment, for example, first
Cylindrical structure 300 includes bottom 230 and transmitting coil 116.For example, transmitting coil 116 is contained in bottom 230.For example, bottom
Lid 230 is the hollow circular cylinder structure of a side opening, and bottom 230 has the first accommodation space 301.For example, the bottom of bottom 230
Central area offers perforation, and transmitting coil 116 is contained in the first accommodation space 301.Ferrite cylinder magnetic core 250 is arranged in
Hole and transmitting coil 116.It should be noted that the center of transmitting coil 116 inherently has the passage that may pass through.
For ease of setting ferrite cylinder magnetic core relative transmission coil and the position of receiving coil, for example, bottom includes lid
Body and cylinder, lid are the hollow circular cylinder structure of a side opening, and lid has the first accommodation space, the area of bottom centre of lid
Domain offers perforation, and transmitting coil is contained in the first accommodation space.For example, hollow circular cylinder structure of the cylinder for both-side opening,
One end of cylinder is connected to threaded end so that cylinder connects the first accommodation space, and cylinder has first passage, ferrite cylinder magnetic
Core is arranged in perforation and first passage so that transmitting coil is set on ferrite cylinder magnetic core.In this way, in setting ferrite
The position of cylinder magnetic core relative transmission coil and receiving coil is, it is only necessary to which ferrite cylinder magnetic core is arranged in into perforation and the
One passage is convenient and swift so that transmitting coil is set on ferrite cylinder magnetic core.
Fig. 4 is referred to, it is the structural representation of the second cylindrical structure 400 in one embodiment, for example, the second cylinder
Body structure 400 includes upper lid 240 and receiving coil 121.Receiving coil 121 is contained in lid 240.For example, upper lid 240 is
The hollow circular cylinder structure of one side opening.For example, upper lid 240 has the second accommodation space 401, receiving coil 121 is housed and the
In two accommodation spaces 401.For example, the bottom center region of upper lid 240 offers through hole, ferrite cylinder magnetic core 250 is arranged in
Through hole is so that receiving coil 121 is set on ferrite cylinder magnetic core 250.
Also referring to Fig. 5 and Fig. 6, its position for being respectively transmitting coil 116 and receiving coil 121 in one embodiment
Structural representation and cross section structure diagram, to improve coupling efficiency, for example, having between transmitting coil 116 and receiving coil 121
There is predetermined inductive gap 501.Ferrite cylinder magnetic core 250 wears transmitting coil 116 and receiving coil 121.For example, predetermined inductive
Gap 501 is less than 5 millimeters.That is, for that preferably can be mutually matched with reception device, making receiving coil also can
On FERRITE CORE center, receiving coil is under 5mm with the actual spacing of transmit coil, to reach preferably coupling
Efficiency.
As shown in figure 5, it illustrates the composition and each other of ferrite cylinder magnetic core, transmitting coil and receiving coil
Position relationship.It is appreciated that the position of three and connected mode determine wireless charging system overall performance.Understand that Fig. 5 is hair
Ray circle and the preferably way of contact of receiving coil, may be such that transmitting coil can farthest carry out coupling with receiving coil
Close.
It should be noted that the electromagnetic coupled that acts through that receiving coil is secondary coil produces exchange at this coil two ends
Voltage signal.In the present embodiment, the frequency of AC signal is identical with the frequency on primary coil,
To make transmit coil produce magnetic flux by as much as possible by receiving coil after FERRITE CORE, for example, wearing
The axis of hole, first passage, through hole and ferrite cylinder magnetic core is located along the same line.So, it is possible to produce transmit coil
Magnetisation flux is as much as possible by receiving coil by FERRITE CORE, makes magnetic induction coupling efficiency higher, that is to say, that nothing
Magnetic flux produced by the transmit coil of line charging system can preferably be coupled to receiving coil, make coupling efficiency higher.
Further, the radius of perforation, the radius of first passage, the radius of through hole, the radius of transmitting coil, receive line
The external diameter of radius and ferrite cylinder magnetic core is equal.
In the present embodiment, the cylinder magnetic core of wireless charging circuit is ferrite cylinder magnetic core.It should be noted that ferrite
Magnetic core have magnetic conductivity it is high, be lost it is low, with characteristics such as magnetic flux densities and frequency of use higher higher；Primary coil with it is secondary
Level coil is attached by ferrite cylinder magnetic core, can increase the mutual inductance of primary coil and secondary coil, while making
Wireless charging efficiency reaches maximization；Significantly impacted due to the relative position of primary coil and secondary coil mutual between coil
Sense size, thus to be placed in parallel between coil and the distance between at a distance of minimum；It is inclined between the mutual inductance and axle center between coil
Move distance to be inversely proportional, such as to reach the wireless charging efficiency of maximum it is necessary to make primary coil be zero with the skew of secondary coil axle center；
So being positioned by ferrite cylinder magnetic core；Primary coil is worked in resonant frequency with secondary coil；It is several more than meeting
Point requirement, makes wireless charging efficiency reach maximum.
It is noted that needed in the consumer products of a certain type a kind of low cost, low-power consumption, high recharge efficiency,
The wireless charging solution simply stablized.Therefore wireless charging circuit of the present utility model and device are due to from power consumption
Very low, stable, required element is few, with low cost, circuit simple, high working efficiency for example may be up to more than 80%, fill
The features such as electrical power is up to 2W, highly versatile, can be applied to such consumer products.For example, low cost is low power removable
Movable property product are included and are not limited only to music player, mobile phone, electric toothbrush, electric hair clipper, electronic toy, small-sized electric
Instrument, rechargeable table lamp etc. use rechargeable battery powered removable application product.
It is appreciated that can also be by determining the charge condition of specific product, and then to the element composition of this charging system
Further optimize to obtain the charging performance for more matching.
To sum up, the beneficial effect of wireless charging circuit of the present utility model and device can be attributed to：
Be connected by with AC220V 50Hz power frequency ACs, by power safety, EMI filter circuit, resistance-capacitance depressurization,
Rectifier bridge rectification, obtains galvanic current source, and be LC self-oscillation circuit with stable direct voltage sources；LC self-oscillations
Circuit can stable vibration start, reach stabilization concussion state；The electric current of alternation is now produced in inductance, so as to produce the magnetic of alternation
；Transmitting coil is separated from one another with receiving coil, and leakage inductance coefficient becomes big and the coefficient of coup diminishes；In order to improve coupling effect, adopt
Take transmit coil and respectively connect a compensating electric capacity with receiving coil, the resonant frequency phase for meeting transmit coil and receiving coil
Together；Transmit coil is on unified hub line with the center of receiving coil using cylinder magnetic core, and make transmit coil and receive
Coil is near possible close, less than 5mm distances；By above measure, inductively efficiency can be made to reach more than 80%；Receive line
The alternating current of coupling is enclosed by rectification, filtering, voltage stabilizing, the charging voltage stablized charges to rechargeable battery；Charge
After battery is full of, rechargeable battery protection circuit shut-off charging circuit is protected to rechargeable battery；In terms of comprehensive, the above
Charging system described in embodiment has circuit element few, and circuit is simple, and reliable operation is with low cost, forms supporting therewith
The characteristics of structure composition is also fairly simple and cheap, is very suitable for combination application in small-sized battery applications product charging side
Face, is the splendid scheme for setting up low cost low-power consumption high efficiency low-power wireless charging application product.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore can not be interpreted as the limitation to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of wireless charging circuit, including electric energy transfer module and electric energy receiver module, it is characterised in that
The electric energy transfer module includes what is be sequentially connected：It is power safety and electromagnetic interference filter circuit, capacitance-resistance voltage reduction circuit, complete
Bridge rectification circuit, DC filtering circuit, high-frequency self-excitation oscillator-amplification circuit and transmitting coil, the power safety are done with electromagnetism
Filter circuit is disturbed to be additionally operable to be connected with external ac power source；
The electric energy receiver module includes what is be sequentially connected：Receiving coil, induced signal current rectifying and wave filtering circuit, direct current regulation circuit
And battery charger, the battery charger is additionally operable to be connected with external cell；
The wireless charging circuit also includes cylinder magnetic core, and the cylinder magnetic core is arranged in the transmitting coil with the reception line
So that the transmitting coil passes through electromagnetic induction wireless connection, the cylinder magnetic core, the transmitting with the receiving coil in circle
The central axis of coil and the receiving coil is on the same line.
2. wireless charging circuit according to claim 1, it is characterised in that the full bridge rectifier is included by four two
The input of the full-bridge or four diode packages of pole pipe composition silicon stack together, the full-bridge or the silicon stack with it is described
The output end of the output end connection of capacitance-resistance voltage reduction circuit, the full-bridge or the silicon stack and the input of the DC filtering circuit
Connection.
3. wireless charging circuit according to claim 1, it is characterised in that the DC filtering circuit includes high-pressure electrolysis
Electric capacity, one end of the high-voltage electrolytic capacitor is connected with the output end of the full bridge rectifier, the high-voltage electrolytic capacitor
The other end is connected with the input of the high-frequency self-excitation oscillator-amplification circuit.
4. wireless charging circuit according to claim 1, it is characterised in that the high-frequency self-excitation oscillator-amplification circuit is used
Capacitance three-point type concussion principle produces frequency in the sine wave signal of 50~100kHz.
5. a kind of wireless charging device, it is characterised in that including transfer circuit plate, circuit board for receiving, bottom, upper lid and as weighed
Profit requires the wireless charging circuit described in 1 to 4, wherein, the cylinder magnetic core is ferrite cylinder magnetic core；
The power safety and electromagnetic interference filter circuit, the capacitance-resistance voltage reduction circuit, the full bridge rectifier, the direct current
Filter circuit and the high-frequency self-excitation oscillator-amplification circuit are arranged on the transfer circuit plate, and the transmitting coil is arranged at
In the bottom, to form the first hollow cylindrical structure；
The induced signal current rectifying and wave filtering circuit, the direct current regulation circuit and the battery charger are arranged at described connecing
Receive on circuit board, the receiving coil is arranged in the upper lid, to form the second hollow cylindrical structure；
The ferrite cylinder magnetic core is arranged in first cylindrical structure and second cylindrical structure, the iron oxygen
The central axis of body cylinder magnetic core, first cylindrical structure and second cylindrical structure on the same line, and
There is predetermined inductive gap between the transmitting coil and the receiving coil.
6. wireless charging device according to claim 5, it is characterised in that the predetermined inductive gap is less than 5 millimeters.
7. wireless charging device according to claim 5, it is characterised in that the bottom includes lid and cylinder, described
Lid is the hollow circular cylinder structure of a side opening, and the lid has the first accommodation space, the area of bottom centre of the lid
Domain offers perforation, and the transmitting coil is contained in first accommodation space；
The cylinder is the hollow circular cylinder structure of both-side opening, and one end of the cylinder is connected to the threaded end so that described
Cylinder connects first accommodation space, and the cylinder has first passage, and the ferrite cylinder magnetic core is arranged in described wearing
Hole and the first passage are so that the transmitting coil is set on the ferrite cylinder magnetic core.
8. wireless charging device according to claim 7, it is characterised in that the upper lid is the hollow circuit cylinder of a side opening
Body structure, the upper lid has the second accommodation space, the receiving coil house with second accommodation space, the upper lid
Bottom center region offer through hole, the ferrite cylinder magnetic core is arranged in the through hole so that the receiving coil is arranged
On the ferrite cylinder magnetic core.
9. wireless charging device according to claim 8, it is characterised in that the perforation, the first passage, described logical
The axis of hole and the ferrite cylinder magnetic core is located along the same line.
10. wireless charging device according to claim 9, it is characterised in that the radius of the perforation, the first passage
Radius, the radius of the through hole, the radius of the transmitting coil, the radius of the reception line and the ferrite cylinder magnetic
The external diameter of core is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621178587.6U CN206283296U (en) | 2016-11-03 | 2016-11-03 | Wireless charging circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621178587.6U CN206283296U (en) | 2016-11-03 | 2016-11-03 | Wireless charging circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206283296U true CN206283296U (en) | 2017-06-27 |
Family
ID=59084002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621178587.6U Active CN206283296U (en) | 2016-11-03 | 2016-11-03 | Wireless charging circuit and device |
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| Country | Link |
|---|---|
| CN (1) | CN206283296U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390473A (en) * | 2018-03-16 | 2018-08-10 | 河南师范大学 | A kind of high robust wireless mobile supply unit |
-
2016
- 2016-11-03 CN CN201621178587.6U patent/CN206283296U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390473A (en) * | 2018-03-16 | 2018-08-10 | 河南师范大学 | A kind of high robust wireless mobile supply unit |
| CN108390473B (en) * | 2018-03-16 | 2021-03-16 | 河南师范大学 | High-robustness wireless mobile power supply device |
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