CN204465114U - The receiving system of wireless charging - Google Patents
The receiving system of wireless charging Download PDFInfo
- Publication number
- CN204465114U CN204465114U CN201520207017.4U CN201520207017U CN204465114U CN 204465114 U CN204465114 U CN 204465114U CN 201520207017 U CN201520207017 U CN 201520207017U CN 204465114 U CN204465114 U CN 204465114U
- Authority
- CN
- China
- Prior art keywords
- circuit
- nmos tube
- pmos
- switch
- electric capacity
- 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.)
- Active
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of receiving system of wireless charging, it comprises coil, resonant circuit, rectification circuit, reference circuit, the first voltage stabilizing circuit, modulation circuit, demodulator circuit, digital control circuit and output observation circuit, the output of coil is connected to the input of resonant circuit, the output of resonant circuit is connected to the input of rectification circuit and the input of demodulator circuit, and the output of demodulator circuit is connected to the input of digital control circuit; The output of rectification circuit is connected to the input of the first voltage stabilizing circuit, and the output of the first voltage stabilizing circuit is connected to the input and load that export observation circuit, and the output exporting observation circuit is connected to the input of digital control circuit; The output of digital control circuit is connected to the input of modulation circuit and the input of voltage stabilizing circuit, and the output of modulation circuit is connected to the input of rectification circuit; The input of described reference circuit is connected to the output of rectification circuit.
Description
Technical field
The utility model relates to wireless charging technical field, and in particular, the utility model provides a kind of receiving system of wireless charging.
Background technology
At present, lithium battery is used widely in mobile terminal electronic product with the performance of excellence, and is progressively developing to other product applications.Recent years, various lithium battery performance does not significantly improve, and the development of mobile terminal and application types of applications software is on mobile terminals rapidly abnormal, and therefore most of mobile terminal all needs charge every day, and even charging every day repeatedly.Wired charging needs to plug frequently, be easy to damage joint, also the danger of electric shock is had, and wired charging device is not compatible mutually with joint yet, wireless charging then can solve above shortcoming, and wireless charger, with its feature such as safe, convenient, durable, can charge at any time, compatibility is also better, has obtained applying more and more widely in the Working Life of people.
Utility model content
What the emitter of wireless charging system sent is analog sine wave signal, the waveform that receiving system needs coupling firing device to send, and from this waveform, obtains stable power supply charge to load for receiving system work simultaneously.The utility model proposes a kind of receiving system of wireless charging, the electric power (signal) sent with the dispensing device effectively receiving wireless charging system at wireless charging system, the utility model by providing the project organization of wireless charging receiver, and then realizes a kind of contactless, safe and reliable wireless charging system.
In order to solve the problems of the technologies described above, the receiving system of wireless charging of the present utility model, comprise coil, resonant circuit, rectification circuit, reference circuit, the first voltage stabilizing circuit, modulation circuit, demodulator circuit, digital control circuit and output observation circuit, the output of coil is connected to the input of resonant circuit, the output of resonant circuit is connected to the input of rectification circuit and the input of demodulator circuit, and the output of demodulator circuit is connected to the input of digital control circuit; The output of rectification circuit is connected to the input of the first voltage stabilizing circuit, and the output of the first voltage stabilizing circuit is connected to the input and load that export observation circuit, and the output exporting observation circuit is connected to the input of digital control circuit; The output of digital control circuit is connected to the input of modulation circuit and the input of voltage stabilizing circuit, and the output of modulation circuit is connected to the input of rectification circuit.
Coil is by the signal coupling of emitter and feed back to resonant circuit; Resonant circuit produces a high-voltage signal after resonance, exports to rectification circuit and demodulator circuit; Rectification circuit converts the ac signal be coupled to direct current signal, and the direct current signal of output is given through the first voltage stabilizing circuit and exported observation circuit and load supplying, powers to digital control circuit through the second voltage stabilizing circuit; Export the charged state that observation circuit detects load (charging device), and feed back to digital control circuit; The signal receiving of the emitter that coil coupling arrives by demodulator circuit out, and is sent to digital control circuit to process; Feedback signal after digital control circuit process is sent to emitter through ovennodulation by resonant circuit by modulation circuit, thus completes the communication between emitter and receiving system.
Further, the input of reference circuit is connected to the output of rectification circuit, and its main purpose is to provide stable reference voltage and reference current.The main purpose of reference circuit is to provide stable reference voltage and reference current, for analog circuit, such as, produces stable supply voltage, produces stable charging voltage and charging current.Reference voltage value and reference current value are related to the overall performance of charging receiver, the stability of such as charging current, and whether the charging voltage such as monitored really reaches preset value etc.This novel reference circuit directly obtains energy from rectification circuit, directly produces the reference voltage irrelevant with VDD and reference current.In the reference circuit of existing wireless charging technology, generally first produce vdd voltage, produce reference voltage again, and then remove stable vdd voltage with reference voltage, such shortcoming is that loop ratio is more, is very easy to cause circuit oscillation, and in the utility model, the energy of reference circuit directly takes from rectification circuit, there is not the loop situations relevant with VDD, and therefore the stability of this framework work is better.
Further, described rectification circuit comprises the rectification unit and clipping unit that are sequentially connected in series, rectification unit converts ac signal to DC signal output, and the direct current signal that rectification unit exports adjusts by clipping unit, thus realizes the function limiting this receiving system builtin voltage.Rectification unit and clipping unit complete rectification function jointly.As the preferred scheme of one, described rectification unit adopts Low threshold MOS device to realize, thus obtains higher conversion efficiency.
As a feasible scheme, this rectification circuit comprises NMOS tube NM1, NMOS tube NM2, NMOS tube NM3, NMOS tube NM4, NMOS tube NM5, PMOS PM1, PMOS PM2, PMOS PM3, PMOS PM4, resistance R1.Wherein rectification unit comprises NMOS tube NM1, NMOS tube NM2, NMOS tube NM3 and NMOS tube NM4 pipe, the grid of NMOS tube NM1 connects the drain electrode of NMOS tube NM2, the grid of NMOS tube NM4 and drain electrode, the drain electrode of NMOS tube NM1 connects the grid of NMOS tube NM2, the grid of NMOS tube NM3 and drain electrode, the source class of NMOS tube NM1 and the source class ground connection of NMOS tube NM2, the source class of NMOS tube NM3 and the source class of NMOS tube NM4 are connected to clipping unit.NMOS tube NM1, NMOS tube NM2, NMOS tube NM3 and NMOS tube NM4 pipe convert alternating voltage to direct voltage.NMOS tube NM5, PMOS PM1, PMOS PM2, PMOS PM3, PMOS PM4, resistance R1 and electric capacity C5 form clipping unit, the drain electrode of the source class of PMOS PM1, the source class of PMOS PM2, NMOS tube NM5 and one end of electric capacity C5 are connected to the source class of the NMOS tube NM4 of rectification unit, the other end ground connection of the source class of the drain electrode of PMOS PM4, the grid of PMOS PM4, NMOS tube NM5, one end of resistance R1 and electric capacity C5; The other end of resistance R1 connects the grid level of NMOS tube NM5 and the drain electrode of PMOS PM2, the grid of the grid connection PMOS PM1 of PMOS PM2, the drain electrode of PMOS PM1, the source class of PMOS PM3, the grid of PMOS PM3 and drain electrode are connected the source class of PMOS PM4.
In above-mentioned receiving system, coil is used for energy and the signal of coupling firing device, signal can also be fed back to emitter by coil simultaneously.
Resonant circuit is generally made up of coil, electric capacity, switch and internal control circuit, and coil here is generally just equivalent to inductance, so resonant circuit is exactly inductance and capacitor resonance in fact.Wherein internal control circuit has generally been come by digital circuit.Resonant circuit produces a high-voltage signal after resonance, exports to rectification circuit, is the energy source of rear class rectification circuit.In the utility model, resonant circuit can change according to the present charge state of receiving system or adjust resonant circuit.If the charging voltage of this receiving system reaches preset value, so just automatically close resonance modules.Resonant circuit can not produce high-voltage signal, also would not waste energy after cutting out.When equipment needs charging, resonant circuit just can be waken up automatically.Resonant circuit in the utility model can also adjust the resonance frequency in receiving system automatically according to the tranmitting frequency of emitter.
As a preferred scheme, the input of described resonant circuit is connected to the output of digital control circuit, this digital control circuit pre-sets threshold voltage, if digital control circuit detects that current charging voltage reaches this threshold voltage, then closes resonant circuit.
As a feasible scheme, described resonant circuit comprises electric capacity C0, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, K switch 1, K switch 11, K switch 2, K switch 22, K switch 3, K switch 33, K switch 4 and K switch 44.K switch 1, electric capacity C1, K switch 11 are connected in series formation first branch road, K switch 2, electric capacity C2, K switch 22 are connected in series formation second branch road, K switch 3, electric capacity C3, K switch 33 are connected in series formation the 3rd branch road, K switch 4, electric capacity C4, K switch 44 are connected in series formation the 4th branch road, and electric capacity C0 and the first branch road, the second branch road, the 3rd branch road, the 4th branch road and coil L1 are all connected in parallel.Electric capacity C1, electric capacity C2, electric capacity C3 are tunable capacitor.
In the utility model, resonant circuit can change according to system present charge state or adjust resonant circuit.If system charging voltage reaches preset value, so just automatically close resonance modules.Resonant circuit can not produce high-voltage signal, also would not waste energy after cutting out.When equipment needs charging, resonant circuit has and is automatically waken up function.In the utility model, adjustablely realize closing resonant circuit according to tuningout resonance frequency, namely resonance frequency tuningout a lot of after, resonant circuit has just almost been coupled less than energy.
First voltage stabilizing circuit will export charging voltage and charging current to exporting observation circuit, and charging voltage is changeless, and charging current is adjustable.Charging current required for system can export according to the setting of user, such as charging current can be set to 0.5A, 1A or 2A.Certainly can this device provide enough charging currents, also depends on the amount that this device is coupled to.First voltage stabilizing circuit can provide user the charging rate needed.
Second voltage stabilizing circuit provides the supply voltage required for system works, such as modular circuit module and the operating voltage required for digital control circuit.
Demodulator circuit mainly coordinates emitter, emitter is issued the signal receiving of receiving system out, and gives digital control circuit to process.
The feedback signal of receiving system is mainly sent to emitter through ovennodulation by modulation circuit, thus completes the communication between emitter and receiving system.
Export the charged state that observation circuit detects load (charging device), and feed back to digital control circuit.
Various types of data in the whole device of digital control circuit process and all kinds of request, and control corresponding circuit module according to result.
Load in this receiving system, is just equivalent to required charging device.
The utility model achieves a kind of receiving system of wireless charging system, is applicable to high frequency wireless charging device.This is novel by foregoing circuit structure, and compared with prior art, tool has the following advantages:
1, this novel reference circuit directly obtains energy from rectification circuit, and directly produce the reference voltage irrelevant with VDD and reference current, there is not the loop situations relevant with VDD, therefore the stability of this framework work is better;
2, rectification circuit converts the ac signal be coupled to DC signal output, and rectification circuit directly decides the charge efficiency of whole charging system.The conversion efficiency of rectification circuit is low, and so charge efficiency also must be low; Conversion efficiency is high, and so charge efficiency also can correspondingly improve.This is novel when designing rectification circuit, adopts Low threshold MOS device as rectification unit, thus directly improves conversion voltage value, also just can improve conversion efficiency.Also comprising clipping unit in rectification circuit, for limiting the voltage of whole receiving system inside, making whole receiving system voltage more stable.The design of rectification circuit is also related to the ESD protection capability of whole receiving system, therefore in rectification circuit of the present utility model, also can design and make it have ESD safeguard function;
3, this novel resonant circuit controls by digital control circuit, can change according to system present charge state or adjust, if system charging voltage reaches preset value, so just automatically closes resonance modules.In addition, by digital control circuit, the resonance frequency in receiving system automatically can also be adjusted according to emitter tranmitting frequency.
Accompanying drawing explanation
Fig. 1: wireless charging device structured flowchart of the present utility model;
Fig. 2: the resonant circuit figure of embodiment of the present utility model and rectification circuit figure.
Embodiment
Now with embodiment, the utility model is further illustrated by reference to the accompanying drawings.
In wireless charging device, generally form whole set of system by emitter and receiving system, emitter is responsible for sending carrier signal, and carrier signal contains energy and relevant data message.In emitter or receiving system, coil be all generally copper cash around to forming, also can adopt PCB printed antenna.The physical parameter relevant with coil comprises shape, the thickness of size and coil and the number of turns etc., and corresponding electrical parameter is equivalent inductance and equivalent capacity, and the electric capacity in equivalent inductance and equivalent capacity and resonant circuit forms resonant circuit jointly.Coil in receiving system and the coil in emitter are all equivalent to inductance, and forming energy coupling, also for mutual communicated data signal.The mode of transfer of data needs to define according to wireless charging agreement and design.The operation principle of technical solution of the present invention is described in detail below in conjunction with Fig. 1.
See Fig. 1, the receiving system of wireless charging of the present invention, comprise coil, resonant circuit, rectification circuit, reference circuit, the first voltage stabilizing circuit, modulation circuit, demodulator circuit, digital control circuit and output observation circuit, the output of coil is connected to the input of resonant circuit, the output of resonant circuit is connected to the input of rectification circuit and the input of demodulator circuit, and the output of demodulator circuit is connected to the input of digital control circuit; The output of rectification circuit is connected to the input of the first voltage stabilizing circuit and the input of reference circuit, and the output of the first voltage stabilizing circuit is connected to the input and load that export observation circuit, and the output exporting observation circuit is connected to the input of digital control circuit; The output of digital control circuit is connected to the input of the input of modulation circuit, the input of resonant circuit and voltage stabilizing circuit, and the output of modulation circuit is connected to the input of rectification circuit.
In receiving system in above-mentioned wireless charging, resonant circuit can be made up of coil, total equivalent capacity and internal control circuit.Coil is generally just equivalent to inductance, so resonant circuit is exactly inductance and electric capacity in fact carry out parallel resonance.It is consistent that wave frequency is carried in the resonance point needs of resonant circuit and transmitting, can ensure the maximization transmission of energy like this.And in wireless charging agreement, different working methods correspond to different operating frequencies, even identical working method, operating frequency also can change, such as magnetic resonance mode, and operating frequency is exactly from hundreds of KHz to a few MHz.Need to calibrate tranmitting frequency for emitter, and for receiving system, need the function with calibration operation frequency equally, to ensure the maximization transmission of energy.Therefore, in receiving system resonant circuit, need to design the adjustable resonance frequency of continuous multi-gear.In the utility model, resonant capacitance in resonant circuit has many grades of adjustable functions, and the frequency can launched according to emitter is carried out from motion tracking and calibration, to be coupled to maximum energy, in physical circuit realizes, resonant capacitance is adjustable, and gear number can set according to the actual requirements.Coil and total resonant capacitance produce a high-voltage signal after resonance, and also electric current is exported to rectification circuit, be the energy source of rear class rectification circuit simultaneously.In the utility model, resonant circuit can change according to system present charge state or adjust resonant circuit.If system charging voltage reaches preset value, so just automatically close resonance modules.Resonant circuit can not produce high-voltage signal, also would not waste energy after cutting out.When equipment needs charging, resonant circuit has and is automatically waken up function.In the utility model, adjustablely realize closing resonant circuit according to tuningout resonance frequency, namely resonance frequency tuningout a lot of after, resonant circuit has just almost been coupled less than energy.Signal after resonance is exported to rectification circuit and demodulator circuit by resonant circuit.Resonance Circuit is subject to the control of modulation circuit and digital control circuit.
Rectification circuit converts the ac signal be coupled to DC signal output.If the magnitude of voltage after conversion is low, so just have lost more multi-energy at rectification module; If the magnitude of voltage after conversion is high, that just means that the energy lost in rectification module is just little, and conversion efficiency is just high, and the conversion efficiency of rectification module directly decides the charge efficiency of whole charging system.Signal after rectification is exported to reference circuit, the first voltage stabilizing circuit and the second voltage stabilizing circuit by rectification circuit.
Reference circuit, main purpose is to provide stable reference voltage and reference current, for analog circuit, such as produce stable supply voltage VDD just to need to use reference voltage, produce stable charging voltage also to need to use reference voltage, charging current value needs to use reference current, also uses a lot of reference voltage and reference current by needs in analog module.Reference voltage value and reference current value are related to the overall performance of charging receiver, the stability of such as charging current, and whether the charging voltage such as monitored really reaches preset value etc.In the utility model, reference circuit will adopt positive and negative temperature-compensating, the reference voltage of output and reference current not changed with receiving system temperature, also reference voltage and reference current is designed to not change with the fluctuation of receiving system supply voltage simultaneously.
First voltage stabilizing circuit, will export charging voltage and charging current to load, charging voltage is changeless, and charging current is adjustable.Charging current required for system can export according to the setting of user, such as charging current can be set to 0.5A, 1A or 2A.Can certain system provide enough charging currents, also depends on the amount that system, coupled arrives.Signal is also exported to testing circuit by the first voltage stabilizing circuit, for detecting the output state in the first voltage stabilizing circuit.First voltage stabilizing circuit is simultaneously also by Digital Circuit Control, and digital circuit is according to result FEEDBACK CONTROL first voltage stabilizing circuit again.
Second voltage stabilizing circuit, is to provide the supply voltage VDD required for system works, such as modular circuit module and the operating voltage required for digital control circuit.Supply voltage needed for different manufacturing process is also different.Such as 0.18um technique, the general 1.8V voltage that adopts is as supply voltage.
Demodulator circuit, mainly coordinates emitter, signal emitter being issued receiving system after filtering after demodulation out, and give digital control circuit to process.Modulation circuit, mainly by the result after digital circuit process by modulation system feedback send to emitter, thus the communication completed between emitter and receiving system and signal mutual.
Load, is just equivalent to required charging device, such as mobile phone in fact, camera or other mobile terminals.Export observation circuit, detect the charged state of charging device exactly, detect the operating state of the first voltage stabilizing circuit, and by result feedback to digital control circuit.
Digital control circuit is the processor of receiving system, is responsible for the Various types of data in process receiving system and all kinds of request, and controls corresponding circuit module according to result, finally complete complete cycle and the control of wireless charging.
Fig. 2 gives the resonant circuit of receiving system in this wireless charging of specific implementation and the circuit theory diagrams of rectification circuit.The following describes the operation principle of resonant circuit and rectification circuit.
See Fig. 2, rectification circuit comprises the rectification unit and clipping unit that are connected in series.This rectification circuit comprises NMOS tube NM1, NMOS tube NM2, NMOS tube NM3, NMOS tube NM4, NMOS tube NM5, PMOS PM1, PMOS PM2, PMOS PM3, PMOS PM4, resistance R1.Wherein rectification unit comprises NMOS tube NM1, NMOS tube NM2, NMOS tube NM3 and NMOS tube NM4 pipe, the grid of NMOS tube NM1 connects the drain electrode of NMOS tube NM2, the grid of NMOS tube NM4 and drain electrode, the drain electrode of NMOS tube NM1 connects the grid of NMOS tube NM2, the grid of NMOS tube NM3 and drain electrode, the source class of NMOS tube NM1 and the source class ground connection of NMOS tube NM2, the source class of NMOS tube NM3 and the source class of NMOS tube NM4 are connected to clipping unit.NMOS tube NM1, NMOS tube NM2, NMOS tube NM3 and NMOS tube NM4 pipe convert alternating voltage to direct voltage.NMOS tube NM5, PMOS PM1, PMOS PM2, PMOS PM3, PMOS PM4, resistance R1 and electric capacity C5 form clipping unit, the drain electrode of the source class of PMOS PM1, the source class of PMOS PM2, NMOS tube NM5 and one end of electric capacity C5 are connected to the source class of the NMOS tube NM4 of rectification unit, the other end ground connection of the source class of the drain electrode of PMOS PM4, the grid of PMOS PM4, NMOS tube NM5, one end of resistance R1 and electric capacity C5; The other end of resistance R1 connects the grid level of NMOS tube NM5 and the drain electrode of PMOS PM2, the grid of the grid connection PMOS PM1 of PMOS PM2, the drain electrode of PMOS PM1, the source class of PMOS PM3, the grid of PMOS PM3 and drain electrode are connected the source class of PMOS PM4.After the voltage of VA point is more than 3 threshold voltages, NMOS tube NM5 conducting will start leakage current, thus makes the voltage drop of VA point, thus makes the voltage stabilization of VA point within the scope of one, thus other devices that protection is inner.For receiving system, 2 of coil are just equivalent to two pins, therefore just there is ESD risk.NMOS tube NM1, NMOS tube NM2, NMOS tube NM3 and NMOS tube NM4 need to carry out ESD design while completing rectification function, and when receiving system generation esd event, NMOS tube NM1 and NMOS tube NM2 can release rapidly ESD electric current.NMOS tube NM3 and NMOS tube NM4 also carries out ESD design, is to prevent ESD to the voltge surge of these two MOS.
Resonant circuit comprises electric capacity C0, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, K switch 1, K switch 11, K switch 2, K switch 22, K switch 3, K switch 33, K switch 4 and K switch 44.K switch 1, electric capacity C1, K switch 11 are connected in series formation first branch road, K switch 2, electric capacity C2, K switch 22 are connected in series formation second branch road, K switch 3, electric capacity C3, K switch 33 are connected in series formation the 3rd branch road, K switch 4, electric capacity C4, K switch 44 are connected in series formation the 4th branch road, and electric capacity C0 and the first branch road, the second branch road, the 3rd branch road, the 4th branch road and coil L1 are all connected in parallel.L1 is exactly the coupling coil of receiving system, and the Energy Coupling launched by emitter is inside receiving system.Electric capacity C0, electric capacity C1, electric capacity C2, electric capacity C3 and electric capacity C4 are resonant capacitances.Receiving system needs to be coupled to maximum energy, and just need the tranmitting frequency making its resonance frequency and emitter to produce resonance, therefore electric capacity C1, electric capacity C2 and electric capacity C3 can adjust according to real work situation, to obtain optimum resonance frequency.In side circuit, the tunable capacitor of more grades can be designed as required.Electric capacity C4 is the switch designs of resonant circuit, and after resonant capacitance C4 accesses, the resonance frequency of whole receiving system will away from the tranmitting frequency of emitter, therefore receiving system is just almost coupled less than energy, be equivalent to resonant circuit and be in resting state, when system needs, then wake up.Whether the signal behavior that certain emitter also can return according to the load of self and receiving system stops emitted energy.K switch 1, K switch 11, K switch 2, K switch 22, K switch 3, K switch 33, K switch 4 and K switch 44 are all the switches controlling resonant capacitance, and concrete control circuit has digital control circuit to realize.
In the utility model, NMOS tube NM3 and NMOS tube NM4 adopts the design of Low threshold MOS device, thus directly improves conversion voltage value.When alternating current conversion direct current, when the DC voltage value after conversion exceedes certain amplitude, the clipping unit in rectification circuit just starts earial drainage thus restriction DC voltage value, and main purpose is that protection receiving system internal components is not damaged by high pressure.In fig. 2, after the voltage of VA is more than 3 voltage thresholds, NMOS tube NM5 will conducting, thus starts leakage current with the magnitude of voltage of stable VA point.In rectification circuit of the present utility model, by NMOS tube NM1, NMOS tube NM2, NMOS tube NM3 and NMOS tube NM4 carry out ESD design, realize ESD protection.Rectification circuit and assistance Capacitance parallel connection, be also directly connected with coil simultaneously, the therefore ESD protection capability of rectification circuit i.e. the ESD protection capability of whole receiving system.
Although specifically show in conjunction with preferred embodiment and describe the utility model; but those skilled in the art should be understood that; not departing from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection range of the present utility model.
Claims (7)
1. the receiving system of wireless charging, it is characterized in that: comprise coil, resonant circuit, rectification circuit, reference circuit, the first voltage stabilizing circuit, modulation circuit, demodulator circuit, digital control circuit and output observation circuit, the output of coil is connected to the input of resonant circuit, the output of resonant circuit is connected to the input of rectification circuit and the input of demodulator circuit, and the output of demodulator circuit is connected to the input of digital control circuit; The output of rectification circuit is connected to the input of the first voltage stabilizing circuit, and the output of the first voltage stabilizing circuit is connected to the input and load that export observation circuit, and the output exporting observation circuit is connected to the input of digital control circuit; The output of digital control circuit is connected to the input of modulation circuit and the input of voltage stabilizing circuit, and the output of modulation circuit is connected to the input of rectification circuit; The input of described reference circuit is connected to the output of rectification circuit.
2. the receiving system of wireless charging according to claim 1, it is characterized in that: described rectification circuit comprises the rectification unit and clipping unit that are sequentially connected in series, rectification unit converts ac signal to DC signal output, the direct current signal that rectification unit exports adjusts by clipping unit, thus realizes the builtin voltage limiting this receiving system.
3. the receiving system of wireless charging according to claim 2, is characterized in that: described rectification circuit comprises NMOS tube NM1, NMOS tube NM2, NMOS tube NM3, NMOS tube NM4, NMOS tube NM5, PMOS PM1, PMOS PM2, PMOS PM3, PMOS PM4, resistance R1;
NMOS tube NM1, NMOS tube NM2, NMOS tube NM3 and NMOS tube NM4 pipe realize rectification unit, the grid of NMOS tube NM1 connects the drain electrode of NMOS tube NM2, the grid of NMOS tube NM4 and drain electrode, the drain electrode of NMOS tube NM1 connects the grid of NMOS tube NM2, the grid of NMOS tube NM3 and drain electrode, the source class of NMOS tube NM1 and the source class ground connection of NMOS tube NM2, the source class of NMOS tube NM3 and the source class of NMOS tube NM4 are connected to clipping unit;
NMOS tube NM5, PMOS PM1, PMOS PM2, PMOS PM3, PMOS PM4, resistance R1 and electric capacity C5 form clipping unit, the drain electrode of the source class of PMOS PM1, the source class of PMOS PM2, NMOS tube NM5 and one end of electric capacity C5 are connected to the source class of the NMOS tube NM4 of rectification unit, the other end ground connection of the source class of the drain electrode of PMOS PM4, the grid of PMOS PM4, NMOS tube NM5, one end of resistance R1 and electric capacity C5; The other end of resistance R1 connects the grid level of NMOS tube NM5 and the drain electrode of PMOS PM2, the grid of the grid connection PMOS PM1 of PMOS PM2, the drain electrode of PMOS PM1, the source class of PMOS PM3, the grid of PMOS PM3 and drain electrode are connected the source class of PMOS PM4.
4. the receiving system of wireless charging according to claim 1, it is characterized in that: described rectification circuit comprises NMOS tube NM1, NMOS tube NM2, NMOS tube NM3 and NMOS tube NM4 pipe, the grid of NMOS tube NM1 connects the drain electrode of NMOS tube NM2, the grid of NMOS tube NM4 and drain electrode, the drain electrode of NMOS tube NM1 connects the grid of NMOS tube NM2, the grid of NMOS tube NM3 and drain electrode, the source class of NMOS tube NM1 and the source class ground connection of NMOS tube NM2, the source class of NMOS tube NM3 is connected with the source class of NMOS tube NM4.
5. the receiving system of wireless charging according to claim 1, is characterized in that: the input of described resonant circuit is also connected to the output of digital control circuit.
6. the receiving system of wireless charging according to claim 5, is characterized in that: described resonant circuit comprises electric capacity C0, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, K switch 1, K switch 11, K switch 2, K switch 22, K switch 3, K switch 33, K switch 4 and K switch 44; K switch 1, electric capacity C1, K switch 11 are connected in series formation first branch road, K switch 2, electric capacity C2, K switch 22 are connected in series formation second branch road, K switch 3, electric capacity C3, K switch 33 are connected in series formation the 3rd branch road, K switch 4, electric capacity C4, K switch 44 are connected in series formation the 4th branch road, and electric capacity C0 and the first branch road, the second branch road, the 3rd branch road, the 4th branch road are all connected in parallel.
7. the receiving system of wireless charging according to claim 6, is characterized in that: described electric capacity C1, electric capacity C2 and electric capacity C3 are tunable capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520207017.4U CN204465114U (en) | 2015-04-08 | 2015-04-08 | The receiving system of wireless charging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520207017.4U CN204465114U (en) | 2015-04-08 | 2015-04-08 | The receiving system of wireless charging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204465114U true CN204465114U (en) | 2015-07-08 |
Family
ID=53671941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520207017.4U Active CN204465114U (en) | 2015-04-08 | 2015-04-08 | The receiving system of wireless charging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204465114U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105299930A (en) * | 2015-11-10 | 2016-02-03 | 苏州美达瑞电子有限公司 | Water heater regulating system based on radio frequency identification |
| CN108469314A (en) * | 2018-05-20 | 2018-08-31 | 丹阳恒芯电子有限公司 | A kind of temperature monitoring system |
| CN108508777A (en) * | 2018-05-20 | 2018-09-07 | 丹阳恒芯电子有限公司 | A kind of intelligent temperature monitoring chip |
-
2015
- 2015-04-08 CN CN201520207017.4U patent/CN204465114U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105299930A (en) * | 2015-11-10 | 2016-02-03 | 苏州美达瑞电子有限公司 | Water heater regulating system based on radio frequency identification |
| CN108469314A (en) * | 2018-05-20 | 2018-08-31 | 丹阳恒芯电子有限公司 | A kind of temperature monitoring system |
| CN108508777A (en) * | 2018-05-20 | 2018-09-07 | 丹阳恒芯电子有限公司 | A kind of intelligent temperature monitoring chip |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104701955A (en) | Wireless charging device | |
| Su et al. | An F-type compensated capacitive power transfer system allowing for sudden change of pickup | |
| CN104348236A (en) | Wireless charging device and method | |
| CN103248138A (en) | Power tracking control device and method for mobile equipment wireless power supply system | |
| CN102545354A (en) | Wireless charging device of small-sized electronic equipment | |
| CN204465114U (en) | The receiving system of wireless charging | |
| CN103606262B (en) | A kind of with the infrared transponder of wireless charging function, system and charging method | |
| CN202405844U (en) | Wireless charging device for small electronic equipment | |
| CN103683441A (en) | Wireless charger and wireless charging system | |
| CN104283294A (en) | Wireless charging system for automobile | |
| CN202206193U (en) | Experimental platform for wireless power transmission | |
| CN102480155A (en) | Charging device | |
| CN201854096U (en) | Charging device | |
| CN203218955U (en) | Wireless charger | |
| CN107612090A (en) | Mobile wireless universal charger | |
| CN201837921U (en) | Wireless power supply system of notebook computer and external mouse | |
| CN205231799U (en) | Adopt electric power carrier wave communication's charging system who is used for electric automobile | |
| CN204391908U (en) | A kind of panel computer of wireless power | |
| CN204258418U (en) | The dual-purpose wireless charger of a kind of photoelectric intelligent | |
| CN102832680A (en) | Thing machine adopting supercapacitor as energy storage medium | |
| CN204178256U (en) | Power station measure and control device | |
| CN204290441U (en) | Wireless charger | |
| CN202712949U (en) | Wireless charger | |
| CN202960456U (en) | Wireless charging handheld slit lamp | |
| CN202918064U (en) | Novel super capacitor managing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221009 Address after: Room 1401, No. 8, Jinshan Road, Siming District, Xiamen City, Fujian Province, 361008 Patentee after: XIAMEN NEWYEA MICROELECTRONICS TECHNOLOGY Co.,Ltd. Address before: 361000 Jingkou 9, Haicang District, Xiamen, Fujian 106 Patentee before: XIAMEN NEWYEA SCIENCE AND TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right |