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CN202309183U - Wireless charging device - Google Patents

Wireless charging device Download PDF

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Publication number
CN202309183U
CN202309183U CN2011204247039U CN201120424703U CN202309183U CN 202309183 U CN202309183 U CN 202309183U CN 2011204247039 U CN2011204247039 U CN 2011204247039U CN 201120424703 U CN201120424703 U CN 201120424703U CN 202309183 U CN202309183 U CN 202309183U
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China
Prior art keywords
impedance matching
matching network
receiving
resistance
transmitting
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CN2011204247039U
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Chinese (zh)
Inventor
崔铁军
周永春
刘硕
陈林辉
周小阳
杨艳
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Southeast University
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Southeast University
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Abstract

The utility model relates to a wireless charging device, which is characterized by comprising a transmission device and a receiving device, wherein the receiving device is coupled with the transmission device; the transmission device comprises a frequency divider, a power switch control and primary amplifying module and an E-type power amplifier, wherein the frequency divider is used for dividing the frequency of a high frequency signal transmitted by an eternal crystal oscillator and transmitting the signal subjected to frequency division into the power switch control and primary amplifying module; the power switch control and primary amplifying module is used for performing primary amplification to the signal subjected to frequency division so as to obtain a square wave signal, and the power switch control and primary amplifying module further comprises a conversion switch which is used for selecting to amplify or close off a signal of previous stage; and the E-type power amplifier is used for receiving the square wave signal subjected to primary amplification so as to be a driving signal, and the driving signal is subjected to power amplification through the E-type power amplifier so as to obtain a large power signal. The wireless charging device provided by the utility model has the advantages of simple structure, wide application, flexibility in option of two characteristics of close efficient charging and remote effective charging, security, freedom from radiation, and the like.

Description

Wireless charging device
Technical field
The utility model relates to a kind of device that miniaturized electronics carries out wireless charging that can be; Relate in particular to a kind of contactless high efficiency wireless charging system that has charging/standby/overload indication; The wireless charging that can be used for small-powers such as mobile phone, MP3, MP4 and camera (below the 5w) electronic equipment; With the distance range that is implemented in designing requirement certain voltage and power are provided, are its charging or power supply.
Background technology
Wireless charging is very popular in recent years research direction, from early stage induction type can wireless charging electric toothbrush and electric shaver can be Powermat (" wireless charging blanket ") the wireless charging suit of cell-phone charging finally.The wireless charger that nowadays many brands have been arranged has on the market all had no small raising from charge power, charge efficiency or property easy to use aspect.On September one, 2010; The standardization body of the first promotion wireless charging technology in the whole world---wireless charging alliance announces in Beijing Qi wireless charging international standard is taken the lead in introducing China, also unites all types of mobile phone wireless charger of having released accord with Q i standard with each major company at present.But the effective wireless charging distance of these products is very nearly (in 1cm) all, promptly requires equipment to be charged and emitter (being charging panel) to be close to.
A kind of mini-plant wireless charging device that we invented increases this effective wireless charging distance greatly, can reach 10cm, still can charge effectively when equipment promptly to be charged and charging panel are separated by 10cm.Parameter through each element in adjustment E class power amplifier, impedance matching network and the coil; Can change through-put power and the efficiency of transmission of whole wireless charging device under certain distance easily, make the utility model can flexible Application in various small power electric subsets and various application scenarios.This device has charging/standby deixis and abnormal alarm function simultaneously, when emitter does not detect equipment to be charged, can get into low power consumpting state automatically with saves energy; When equipment to be charged is placed on the emitter, can gets into charged state automatically and electric energy is provided for it.When large-area metal was placed on it, emitter will detect automatically, and closed its power amplifier module and make it and avoid being damaged (also avoided the metal heating simultaneously and accidents caused).At this moment, indication and buzzer can start to remind the user unusually.
Summary of the invention
Technical problem:The purpose of the utility model provides wireless charging device; This device can carry out wireless charging effectively to small-powers such as mobile phone, MP3, MP4 and camera (below the 5w) electronic equipment under certain distance (in the 10cm); Parameter through each element in adjustment E class power amplifier, impedance matching network and the coil; Can change through-put power and the efficiency of transmission of whole wireless charging device under certain distance easily, this device has charging/standby deixis and abnormal alarm function simultaneously.
Technical scheme:A kind of wireless charging device, this device comprise emitter and the receiving system that is coupled with emitter;
Described emitter comprises
Frequency divider, the high-frequency signal that is used for external crystal-controlled oscillation is sent carries out frequency division, and the signal behind the frequency division is sent into power switch control and elementary amplification module;
Power switch control and elementary amplification module are used for that the signal behind the above-mentioned frequency division that receives is carried out elementary amplification and obtain square-wave signal, and this module also comprises change over switch, are used for selecting the prime signal is amplified or shutoff;
E class power amplifier is used to receive said by the square-wave signal after the elementary amplification, as its drive signal, carries out obtaining high-power signal after the power amplification through E class power amplifier;
The emission impedance matching network is used to receive said high-power signal, and directly this high-power signal directly is fed into transmitting coil; The equiva lent impedance that the emission impedance matching network is come mapping after the transmitting coil transforms to the optimum load resistance Rs of E class power amplifier, makes E class power amplifier be operated in optimum state;
Transmitting coil is used for through resonance coupling high-power signal being delivered to receiving coil;
Peak detection block is used for the envelope peak that the peak detects voltage on the impedance matching network element;
Main control unit is used for differentiating according to the envelope peak of above-mentioned voltage the operating state of E class power amplifier, and under abnormality, promptly crest voltage is lower than threshold value, can send control signal and make power switch control and elementary amplification module close E class power amplifier; Main control unit also is used to send the change over switch that control signal is come control of power controlling switch and elementary amplification module, makes emitter switch flexibly in standby and operating state; Active cell also is used to control the anxious buzzer of indicator light;
Level switch module, the CMOS level conversion that is used for main control unit output is a Transistor-Transistor Logic level, with direct power controlling switch control and elementary amplification module;
Indicator light and buzzer are used to notify the user to understand the operating state of this charging device at any time;
Described receiving system comprises
Receiving coil is used for receiving the high-power signal that transmitting coil sends with overcoupling;
Receive impedance matching network; Be used for and transform to the reception load resistance from the equiva lent impedance that the receiving coil mapping is come; The reception load resistance is here represented the equivalent resistance through the load to be charged afterwards of rectification module and Voltage stabilizing module, makes power delivery that receiving coil receives in equipment to be charged;
Rectification module is used for the high-power signal that receives is transformed to direct current;
Voltage stabilizing module is used for the direct current that receives is become the constant voltage direct current.
Preferably, adopt the coupling of resonance magnetic between transmitting coil and the receiving coil, belong to the near field coupling.
Preferably; E class power amplifier is that the square-wave signal that prime provides is amplified to 1.3-1.7 that equipment to be charged charges normal power doubly, and E class power amplifier comprises N channel field-effect pipe N-MosFet, the first choke induction L, the second choke induction Lt, first capacitor C 1 and second capacitor C;
Wherein the second choke induction Lt is between the drain terminal of power Vcc and N channel field-effect pipe N-MosFet; First capacitor C 1 is between the drain terminal and ground of N channel field-effect pipe N-MosFet; Second capacitor C and first choke induction L series connection, second capacitor C and the first choke induction L lay respectively between the drain terminal and output port of N-MosFet.
Preferably, emission impedance matching network, transmitting coil, receiving coil and reception impedance matching network are formed Network Transmission,
Definition efficient best equivalence emission impedance Z EqtBe " when efficiency of transmission reaches maximum, seeing equiva lent impedance in the past to receiving coil " from transmitting coil,
Definition efficient best equivalence receives impedance Z EqrBe " when efficiency of transmission is maximum, seeing equiva lent impedance in the past to the band charging load " from receiving coil:
Wherein, R SBe the power source optimum load resistance, R LBe to receive load resistance, k is the coupling coefficient between transmitting coil and the receiving coil, and ω is the operating angle frequency of whole wireless energy transform device, L tBe the transmitting coil self-induction, L rBe the receiving coil self-induction, R PtBe the transmitting coil loss resistance, R PrBe the receiving coil loss resistance, R EqrBe that the efficient best equivalence receives resistance, R EqtBe efficient best equivalence emission resistance, X EqrBe that the efficient best equivalence receives reactance, X EqtBe efficient best equivalence emission reactance, j is an imaginary unit.
Preferably, when receiving resistance R eqr, the efficient best equivalence equals to receive load resistance R LThe time, or equal power source optimum load resistance R as efficient best equivalence emission resistance R eqt SThe time, emission impedance matching network and reception impedance matching network adopt the B1 type impedance matching network or the B2 type impedance matching network of an element.
Preferably, when efficient best equivalence reception resistance R EqrLess than receiving load resistance R LThe time, or when efficient best equivalence emission resistance R EqtLess than power source optimum load resistance R SThe time, the emission impedance matching network with receive AL1 type impedance matching network that impedance matching network adopts two elements, AL2 type impedance matching network, AL3 type impedance matching network, and AL4 type impedance matching network in any; Perhaps
When the efficient best equivalence receives resistance R EqrLess than receiving load resistance R LThe time, or when efficient best equivalence emission resistance R EqtLess than power source optimum load resistance R SThe time, the emission impedance matching network with receive impedance matching network adopt three-element APi1 type impedance matching network, APi2 type impedance matching network, APi3 type impedance matching network, APi4 type impedance matching network, AT1 type impedance matching network, AT2 type impedance matching network, AT3 type impedance matching network, AT4 type impedance matching network, and AT5 type impedance matching network in any.
Preferably, when efficient best equivalence reception resistance R EqrGreater than receiving load resistance R LThe time, or when efficient best equivalence emission resistance R EqtGreater than power source optimum load resistance R SThe time, emission impedance matching network and the CL1 type impedance matching network and the CL2 type impedance matching network that receive impedance matching network employing two elements; Perhaps
When the efficient best equivalence receives resistance R EqrGreater than receiving load resistance R LThe time, or when efficient best equivalence emission resistance R EqtGreater than power source optimum load resistance R SThe time, the emission impedance matching network with receive impedance matching network adopt three-element CPi1 type impedance matching network, CPi2 type impedance matching network, CT1 type impedance matching network, CT2 type impedance matching network, CT3 type impedance matching network, and CT4 type impedance matching network in any.8, according to the arbitrary described wireless charging device of claim 5-7, it is characterized in that: the first port Port1 in every type the impedance matching network is used to connect receiving coil or transmitting coil; The second port Port2 is used to connect the reception load resistance R of receiving system LThe perhaps power source optimum load resistance R of emitter s
Preferably; Peak detection block is used for picking up the voltage peak of element on the emission impedance matching network; Pick up the voltage peak of element on the impedance matching network through a peak detection circuit, the direct current of output improves carrying load ability through an operational amplifier earlier, behind the sign-changing amplifier adder-subtractor of forming through the another one operational amplifier more afterwards; Export to the single-chip microcomputer I/O port, single-chip microcomputer is judged the operating state of power amplifier through the size of judging the value of obtaining; Wherein a variable resistor connecting of forward amplifier positive input terminal is used for testing circuit being regulated according to actual conditions at side circuit, so that the operating state of testing circuit correctly.
Beneficial effect:Compared with prior art, the utlity model has following advantage:
Simple in structure, be widely used.Because the components and parts that the utility model adopted are all very common; And whole system block diagram clear thinking, simple in structure; Therefore need not to revise macrostructure, only need to change the wireless charging field that different component parameters just can be widely used in any miniaturized electronics.
Adjustability between the remote and high efficiency.The utility model has the good characteristic that under farther distance, effectively transmits than existing product, closely the time, has the high-efficiency transfer characteristic again.Simultaneously, the parameter of adjusting each element of Network Transmission part simply just can closely selected between high efficiency of transmission and the remote effective transmission flexibly.
Safety is radiationless.Because the core of this device, promptly Network Transmission partly adopts the coupling of resonance magnetic, and energy is delivered to receiving coil from transmitting coil almost radiationlessly, the electromagnetic leakage that therefore almost has no.Simultaneously, because the frequency that adopts is low, therefore radiationless to human body safety.
Description of drawings
Fig. 1 is the system block diagram of the utility model device;
The E class power amplifier figure that Fig. 2 adopts for the utility model;
Fig. 3 is the Network Transmission partial circuit figure of the utility model;
Fig. 4 a is for being B1 type impedance matching network circuit diagram;
Fig. 4 b is for matching the Smith chart that receives load resistance RL process for B1 type impedance matching network receives resistance R eqr with the efficient best equivalence.
Fig. 4 c is for matching efficient best equivalence emission resistance R eqt for B1 type impedance matching network the Smith chart of power source optimum load resistance RS process.
Fig. 5 a is the B2 type impedance matching network circuit diagram of the utility model;
Fig. 5 b is that B2 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Fig. 5 c is the Smith chart that B2 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Fig. 6 a is the AL1 type impedance matching network circuit diagram of the utility model;
Fig. 6 b is that AL1 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Fig. 6 c is the Smith chart that AL1 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Fig. 7 a is the AL2 type impedance matching network circuit diagram of the utility model;
Fig. 7 b is that AL2 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Fig. 7 c is the Smith chart that AL2 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Fig. 8 a is the AL3 type impedance matching network circuit diagram of the utility model;
Fig. 8 b is that AL3 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Fig. 8 c is the Smith chart that AL3 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Fig. 9 a is the AL4 type impedance matching network circuit diagram of the utility model;
Fig. 9 b is that AL4 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Fig. 9 c is the Smith chart that AL4 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 10 a is the APi1 type impedance matching network circuit diagram of the utility model;
Figure 10 b is that APi1 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 10 c is the Smith chart that APi1 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 11 a is the APi2 type impedance matching network circuit diagram of the utility model;
Figure 11 b is that APi2 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 11 c is the Smith chart that APi2 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 12 a is the APi3 type impedance matching network circuit diagram of the utility model;
Figure 12 b is that APi3 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 12 c is the Smith chart that APi3 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 13 a is the APi4 type impedance matching network circuit diagram of the utility model;
Figure 13 b is that APi4 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 13 c is the Smith chart that APi4 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 14 a is the AT1 type impedance matching network circuit diagram of the utility model;
Figure 14 b is that AT1 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 14 c is the Smith chart that AT1 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 15 a is the AT2 type impedance matching network circuit diagram of the utility model;
Figure 15 b is that AT2 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 15 c is the Smith chart that AT2 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 16 a is the AT3 type impedance matching network circuit diagram of the utility model;
Figure 16 b is that AT3 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 16 c is the Smith chart that AT3 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 17 a is the AT4 type impedance matching network circuit diagram of the utility model;
Figure 17 b is that AT4 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 17 c is the Smith chart that AT4 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 18 a is the AT5 type impedance matching network circuit diagram of the utility model;
Figure 18 b is that AT5 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 18 c is the Smith chart that AT5 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 19 a is the CL1 type impedance matching network circuit diagram of the utility model;
Figure 19 b is that CL1 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 19 c is the Smith chart that CL1 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 20 a is the CL2 type impedance matching network circuit diagram of the utility model;
Figure 20 b is that CL2 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 20 c is the Smith chart that CL2 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 21 a is the CPi1 type impedance matching network circuit diagram of the utility model;
Figure 21 b is that CPi1 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 21 c is the Smith chart that CPi1 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 22 a is the CPi2 type impedance matching network circuit diagram of the utility model;
Figure 22 b is that CPi2 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 22 c is the Smith chart that CPi2 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 23 a is the CT1 type impedance matching network circuit diagram of the utility model;
Figure 23 b is that CT1 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 23 c is the Smith chart that CT1 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 24 a is the CT2 type impedance matching network circuit diagram of the utility model;
Figure 24 b is that CT2 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 24 c is the Smith chart that CT2 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 25 a is the CT3 type impedance matching network circuit diagram of the utility model;
Figure 25 b is that CT3 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 25 c is the Smith chart that CT3 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
Figure 26 a is the CT4 type impedance matching network circuit diagram of the utility model;
Figure 26 b is that CT4 type impedance matching network receives the Smith chart that resistance R eqr matches reception load resistance RL process with the efficient best equivalence.
Figure 26 c is the Smith chart that CT4 type impedance matching network matches efficient best equivalence emission resistance R eqt power source optimum load resistance RS process.
The peak detection block circuit diagram of Figure 27 for being adopted in the utility model;
A kind of emitter circuit diagram of Figure 28 for providing in the specific embodiments in the utility model;
A kind of receiving system circuit diagram of Figure 29 for providing in the specific embodiments in the utility model.
Embodiment
Below with reference to accompanying drawings the utility model is described.
The utility model provides can be the device that miniaturized electronics carries out wireless charging, relates in particular to a kind of contactless high efficiency wireless charging system that has charging/standby/overload indication, mainly is made up of emitter and receiving system.Wherein emitter comprises frequency divider, power switch control and elementary amplification module, level switch module, main control unit, indicator light and buzzer, peak detection block, E class power amplifier, impedance matching network and transmitting coil; Receiving system comprises receiving coil, impedance matching network, rectification module and Voltage stabilizing module.The utility model can be applied in the wireless charging of small-powers such as mobile phone, MP3, MP4 and camera (5w below) electronic equipment, and the distance range that can be implemented in designing requirement provides certain voltage and power to charge for it or supplies power.The utlity model has simple in structure, be widely used, can advantage such as closely selecting, safety is radiationless between efficient charging and remote these two characteristics of effectively charging flexibly.
TTL transistor-transistor logic level.
A kind of wireless charging device is characterized in that: this device comprises emitter and the receiving system that is coupled with emitter;
Described emitter comprises
Frequency divider, the high-frequency signal that is used for external crystal-controlled oscillation is sent carries out frequency division, and the signal behind the frequency division is sent into power switch control and elementary amplification module;
Power switch control and elementary amplification module are used for that the signal behind the above-mentioned frequency division that receives is carried out elementary amplification and obtain square-wave signal, and this module also comprises change over switch, are used for selecting the prime signal is amplified or shutoff;
E class power amplifier is used to receive said by the square-wave signal after the elementary amplification, as its drive signal, carries out obtaining high-power signal after the power amplification through E class power amplifier;
The emission impedance matching network is used to receive said high-power signal, and directly this high-power signal directly is fed into transmitting coil; The equiva lent impedance that the emission impedance matching network is come mapping after the transmitting coil transforms to the optimum load resistance Rs of E class power amplifier, makes E class power amplifier be operated in optimum state;
Transmitting coil is used for through resonance coupling high-power signal being delivered to receiving coil;
Peak detection block is used for the envelope peak that the peak detects voltage on the impedance matching network element;
Main control unit is used for differentiating according to the envelope peak of above-mentioned voltage the operating state of E class power amplifier, and under abnormality, promptly crest voltage is lower than threshold value, can send control signal and make power switch control and elementary amplification module close E class power amplifier; Main control unit also is used to send the change over switch that control signal is come control of power controlling switch and elementary amplification module, makes emitter switch flexibly in standby and operating state; Active cell also is used to control the anxious buzzer of indicator light;
Level switch module, the CMOS level conversion that is used for main control unit output is a Transistor-Transistor Logic level, with direct power controlling switch control and elementary amplification module;
Indicator light and buzzer are used to notify the user to understand the operating state of this charging device at any time;
Described receiving system comprises
Receiving coil is used for receiving the high-power signal that transmitting coil sends with overcoupling;
Receive impedance matching network; Be used for and transform to the reception load resistance from the equiva lent impedance that the receiving coil mapping is come; The reception load resistance is here represented the equivalent resistance through the load to be charged afterwards of rectification module and Voltage stabilizing module, makes power delivery that receiving coil receives in equipment to be charged;
Rectification module is used for the high-power signal that receives is transformed to direct current;
Voltage stabilizing module is used for the direct current that receives is become the constant voltage direct current.
Adopt the coupling of resonance magnetic between transmitting coil and the receiving coil, belong to the near field coupling.
E class power amplifier is that the square-wave signal that prime provides is amplified to 1.3-1.7 that equipment to be charged charges normal power doubly, and E class power amplifier comprises N channel field-effect pipe N-MosFet, the first choke induction L, the second choke induction Lt, first capacitor C 1 and second capacitor C;
Wherein the second choke induction Lt is between the drain terminal of power Vcc and N channel field-effect pipe N-MosFet; First capacitor C 1 is between the drain terminal and ground of N channel field-effect pipe N-MosFet; Second capacitor C and first choke induction L series connection, second capacitor C and the first choke induction L lay respectively between the drain terminal and output port of N-MosFet.
Emission impedance matching network, transmitting coil, receiving coil and reception impedance matching network are formed Network Transmission,
Definition efficient best equivalence emission impedance Z EqtBe " when efficiency of transmission reaches maximum, seeing equiva lent impedance in the past to receiving coil " from transmitting coil,
Figure 614216DEST_PATH_IMAGE002
Definition efficient best equivalence receives impedance Z EqrBe " when efficiency of transmission is maximum, seeing equiva lent impedance in the past to the band charging load " from receiving coil:
Figure DEST_PATH_IMAGE005
Wherein, R SBe the power source optimum load resistance, R LBe to receive load resistance, k is the coupling coefficient between transmitting coil and the receiving coil, and ω is the operating angle frequency of whole wireless energy transform device, L tBe the transmitting coil self-induction, L rBe the receiving coil self-induction, R PtBe the transmitting coil loss resistance, R PrBe the receiving coil loss resistance, R EqrBe that the efficient best equivalence receives resistance, R EqtBe efficient best equivalence emission resistance, X EqrBe that the efficient best equivalence receives reactance, X EqtBe efficient best equivalence emission reactance, j is an imaginary unit.
When receiving resistance R eqr, the efficient best equivalence equals to receive load resistance R LThe time, or equal power source optimum load resistance R as efficient best equivalence emission resistance R eqt SThe time, emission impedance matching network and reception impedance matching network adopt the B1 type impedance matching network or the B2 type impedance matching network of an element.
When the efficient best equivalence receives resistance R EqrLess than receiving load resistance R LThe time, or when efficient best equivalence emission resistance R EqtLess than power source optimum load resistance R SThe time, the emission impedance matching network with receive AL1 type impedance matching network that impedance matching network adopts two elements, AL2 type impedance matching network, AL3 type impedance matching network, and AL4 type impedance matching network in any; Perhaps
When the efficient best equivalence receives resistance R EqrLess than receiving load resistance R LThe time, or when efficient best equivalence emission resistance R EqtLess than power source optimum load resistance R SThe time, the emission impedance matching network with receive impedance matching network adopt three-element APi1 type impedance matching network, APi2 type impedance matching network, APi3 type impedance matching network, APi4 type impedance matching network, AT1 type impedance matching network, AT2 type impedance matching network, AT3 type impedance matching network, AT4 type impedance matching network, and AT5 type impedance matching network in any.
When the efficient best equivalence receives resistance R EqrGreater than receiving load resistance R LThe time, or when efficient best equivalence emission resistance R EqtGreater than power source optimum load resistance R SThe time, emission impedance matching network and the CL1 type impedance matching network and the CL2 type impedance matching network that receive impedance matching network employing two elements; Perhaps
When the efficient best equivalence receives resistance R EqrGreater than receiving load resistance R LThe time, or when efficient best equivalence emission resistance R EqtGreater than power source optimum load resistance R SThe time, the emission impedance matching network with receive impedance matching network adopt three-element CPi1 type impedance matching network, CPi2 type impedance matching network, CT1 type impedance matching network, CT2 type impedance matching network, CT3 type impedance matching network, and CT4 type impedance matching network in any.8, according to the arbitrary described wireless charging device of claim 5-7, it is characterized in that: the first port Port1 in every type the impedance matching network is used to connect receiving coil or transmitting coil; The second port Port2 is used to connect the reception load resistance R of receiving system LThe perhaps power source optimum load resistance R of emitter s
Peak detection block is used for picking up the voltage peak of element on the emission impedance matching network; Pick up the voltage peak of element on the impedance matching network through a peak detection circuit; The direct current of output improves carrying load ability through an operational amplifier earlier; After passing through the sign-changing amplifier adder-subtractor of another one operational amplifier composition more afterwards, export to the single-chip microcomputer I/O port, single-chip microcomputer is judged the operating state of power amplifier through the size of judging the value of obtaining; Wherein a variable resistor connecting of forward amplifier positive input terminal is used for testing circuit being regulated according to actual conditions at side circuit, so that the operating state of testing circuit correctly.
The miniaturized electronics wireless charging device of the utility model comprises emitter and receiving system two parts.Wherein emitter mainly comprises frequency divider, power switch control and elementary amplification module, level switch module, main control unit, indicator light and buzzer, peak detection block, E class power amplifier, impedance matching network and transmitting coil; Receiving system mainly comprises receiving coil, impedance matching network, rectification module and Voltage stabilizing module, and is as shown in Figure 1.
The workflow of the whole device of brief description at first.
High-frequency signal that external crystal-controlled oscillation is sent is admitted to power switch control after through the frequency divider frequency division and elementary amplification module carries out elementary amplification; Main control unit can send the switch that control signal is controlled this module simultaneously, so that emitter can be switched in standby and operating state flexibly.By the drive signal of the square-wave signal behind preliminary the amplification, carry out high-power signal after the power amplification through E class power amplifier and directly be fed into transmitting coil after through impedance matching network as an E power-like amplifier.Here impedance matching network can transform to the equiva lent impedance that mapping after the transmitting coil is come the optimum load impedance of E class power amplifier, makes E class power amplifier be operated in optimum state (having greater efficiency when promptly having big power output).Peak detection block is used for detecting in the impedance matching network envelope peak of voltage on certain particular element; Main control unit is differentiated the operating state of E class power amplifier according to the size of this voltage; (crest voltage is lower than certain threshold value) can be sent control signal automatically and make power switch control and elementary amplification module close E class power amplifier under abnormality, prevents that power amplifier from damaging because of abnormal work or accidents caused.Indicator light and buzzer make the user know the operating state of whole device constantly under the control of main control unit simultaneously.
Transmitting coil makes energy be close to through resonance coupling and is delivered to receiving coil radiationlessly.Owing to adopt the coupling of resonance magnetic between transmitting coil and the receiving coil, belong to the near field coupling, the radiation resistance of transmitting coil and receiving coil is very little so that can ignore, so energy almost all is coupled to receiving terminal by transmitting terminal.Afterwards, the high-power signal that receives is fed to rectification module through impedance matching network.Here; It is similar with the effect of emission impedance matching network to receive impedance matching network; Be impedance conversion to a desired value that will pass through the band charging load after rectification module and the Voltage stabilizing module, be transferred in the equipment to be charged with making power-efficient that receiving coil receives.Because equipment to be charged needs a constant voltage direct current, therefore need to increase the high frequency sinusoidal signal that rectification module and Voltage stabilizing module will pass through behind the receiving coil and be transformed to the constant voltage direct current.
Elaborate in the face of several piths in the whole device down.
The effect of E class power amplifier module is that the low-power level signal that prime provides is amplified to about 1.5 times (because the energy transmission efficiency to final load to be charged is about 70% after the E class power amplifier) that can provide miniaturized electronics to charge normal power, promptly between the 3w-4w.Because power amplifier module is a big bottleneck of the whole wireless charging device gross efficiency of restriction; Improve the efficient of power amplifier module as far as possible and will bring very big contribution, so the utility model has adopted the ideal efficiency that is operated on off state can reach 100% E power-like amplifier the raising of whole system efficient.But, can consume certain power, so actual efficiency can reach about 90% because actual power tube and non-ideal switches also have certain resistance during saturation conduction.The E class power amplifier that the utility model adopted comprises N channel field-effect pipe N-MosFet, choke induction L, choke induction L t, capacitor C 1 and capacitor C, annexation is as shown in Figure 2.
Emission impedance matching network, transmitting coil, receiving coil and these four modules of reception impedance matching network have constituted the Network Transmission part of whole device; Being the core of whole the utility model, also is another the big factor that influences the whole system gross efficiency simultaneously.The electrical quantity of the electrical quantity of coil, the physical distance between the coil and impedance matching network all is related to the efficient of Network Transmission part, will specify about how the parameter of each element in the planned network hop here and make the maximise transmission efficiency of network portion.
As shown in Figure 3, define two variablees: efficient best equivalence emission impedance Z EqtReceive impedance Z with the efficient best equivalence EqrEfficient best equivalence emission impedance Z EqtBe when efficiency of transmission reaches maximum, see equiva lent impedance in the past to receiving coil from transmitting coil; And the efficient best equivalence receives impedance Z EqrBe when efficiency of transmission is maximum, to see equiva lent impedance in the past to the band charging load from receiving coil.Z EqtAnd Z EqrAnalytical expression following:
Figure 226594DEST_PATH_IMAGE004
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Figure 812296DEST_PATH_IMAGE002
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Wherein, R SBe the power source optimum load resistance, R LBe to receive load resistance, k is the coupling coefficient between transmitting coil and the receiving coil, and ω is the operating angle frequency of whole wireless energy transform device, L tBe the transmitting coil self-induction, R PtBe the transmitting coil loss resistance, L rBe the receiving coil self-induction, R PrBe the receiving coil loss resistance, R EqrBe that the efficient best equivalence receives resistance, R EqtBe efficient best equivalence emission resistance, X EqrBe that the efficient best equivalence receives reactance, X EqtBe efficient best equivalence emission reactance, j is an imaginary unit.
Therefore, the effect of emission impedance matching network is exactly with Z EqtWith R SMate, the effect that receives impedance matching network is exactly with Z EqrWith R LMate.The form of impedance matching network is varied, can be according to Z EqtWith R SAnd Z EqrWith R LBetween magnitude relationship specifically select.As an example, we provide some element, two elements and three-element impedance matching networks commonly used.
When the efficient best equivalence receives resistance R EqrWhen equaling to receive load resistance RL, the emission impedance matching network can adopt following 2 types impedance matching network; When efficient best equivalence emission resistance R EqtEqual power source optimum load resistance R sThe time, receive impedance matching network and can adopt following 2 types impedance matching network:
The B1 type impedance matching network (as shown in Figure 4) of one element;
B2 type impedance matching network (as shown in Figure 5).
When the efficient best equivalence receives resistance R EqrLess than receiving load resistance R LThe time, the emission impedance matching network can adopt following 13 types impedance matching network; When efficient best equivalence emission resistance R EqtLess than power source optimum load resistance R SThe time, receive impedance matching network and can adopt following 13 types impedance matching network:
The AL1 type impedance matching network (as shown in Figure 6) of two elements;
The AL2 type impedance matching network (as shown in Figure 7) of two elements;
The AL3 type impedance matching network (as shown in Figure 8) of two elements;
The AL4 type impedance matching network (as shown in Figure 9) of two elements;
Three-element APi1 type impedance matching network (shown in figure 10);
Three-element APi2 type impedance matching network (shown in figure 11);
Three-element APi3 type impedance matching network (shown in figure 12);
Three-element APi4 type impedance matching network (shown in figure 13);
Three-element AT1 type impedance matching network (shown in figure 14);
Three-element AT2 type impedance matching network (shown in figure 15);
Three-element AT3 type impedance matching network (shown in figure 16);
Three-element AT4 type impedance matching network (shown in figure 17);
Three-element AT5 type impedance matching network (shown in figure 18).
When the efficient best equivalence receives resistance R EqrGreater than receiving load resistance R LThe time, the emission impedance matching network can adopt following 8 types impedance matching network; When efficient best equivalence emission resistance R EqtGreater than power source optimum load resistance R SThe time, receive impedance matching network and can adopt following 8 types impedance matching network:
The CL1 type impedance matching network (shown in figure 19) of two elements;
The CL2 type impedance matching network (shown in figure 20) of two elements;
Three-element CPi1 type impedance matching network (shown in figure 21);
Three-element CPi2 type impedance matching network (shown in figure 22);
Three-element CT1 type impedance matching network (shown in figure 23);
Three-element CT2 type impedance matching network (shown in figure 24);
Three-element CT3 type impedance matching network (shown in figure 25);
Three-element CT4 type impedance matching network (shown in figure 26).
Understand the matching principle of every kind of impedance matching network of the utility model for the ease of the user, every kind of impedance matching network is furnished with corresponding Smith chart simultaneously.
Port1 port in every kind of impedance matching network is used to connect the receiving coil or the transmitting coil of receiving system, and the Port2 port in every kind of impedance matching network is used to connect the load resistance R of receiving system LThe perhaps power source R of emitter s
Peak detection block is used for extracting the voltage peak of certain element on the emission impedance matching network; Extract the voltage peak of certain element on the impedance matching network through a peak detection circuit; The direct current of output improves carrying load ability through an operational amplifier earlier; After passing through the sign-changing amplifier adder-subtractor of another one operational amplifier composition more afterwards, export to single-chip microcomputer IO mouth, single-chip microcomputer obtains the operating state that is worth size to judge power amplifier through judging.Wherein a variable resistor connecting of forward amplifier positive input terminal is used for testing circuit being regulated according to actual conditions at side circuit, so that the operating state of testing circuit correctly.Peak detection circuit is shown in figure 27.
Last part and parcel is exactly rectification module and the Voltage stabilizing module in the receiving system; Owing to what receive from receiving coil is the sinusoidal high-power signal of high frequency; And apparatus of load to be charged needs a constant voltage direct current, therefore needs a rectifying and voltage-stabilizing module to change.At first the all-wave sine wave becomes the half-wave sine wave after through a full bridge rectifier, through a filter capacitor half-wave sine wave is become approximate DC level (still having certain ripple this moment) afterwards.Because equipment to be charged needs one not with the input of the constant voltage of front end influence, promptly change and still can keep constant voltage output when causing DC level to fluctuate up and down when coil distance or other front end parameter, need a Voltage stabilizing module.Consider in the utility model that input and output voltage pressure reduction reaches the efficiency comes first reason more greatly, adopt the switch voltage-stabilizing chip, though output voltage ripple is bigger than linear voltage stabilization chip, conversion efficiency is much higher.
A kind of embodiment that a kind of miniaturized electronics wireless charging device that the utility model proposed is adopted is described below.
At first, the employed electronic component model of each module in the system block diagram is explained.
What external crystal-controlled oscillation adopted is the 16.000MHz crystal oscillator.
Frequency divider adopts a slice CD4060.
Power switch control and elementary amplification module at first adopt a slice CD4073B three inputs and door to improve carrying load ability, adopt a pair of BC327 and BC337 triode push-pull power amplifier further to improve power output then.
Main control unit adopts the STC12C5A60S2_44 single-chip microcomputer.
Level switch module adopts 40109B.
Peak detection block adopts a slice LM358 (comprising two operational amplifiers).
MOSFET in the E class power amplifier adopts IRF7495.
The emission impedance matching network adopts AL1 type impedance matching network.
Receive impedance matching network and adopt AL1 type impedance matching network.
Transmitting coil adopts line footpath 0.5mm enamel covered wire to turn to the square coil of 6 circle 110mm x 80mm.
Receiving coil adopts line footpath 0.3mm to turn to the square coil of 10 circle 40mm x 35mm.
Rectification module and Voltage stabilizing module adopt the full-wave bridge rectifier circuit of four fast recovery diodes compositions and the voltage stabilizing circuit of a slice ADP3050 dc-dc voltage stabilizing chip and respective peripheral circuit composition.
According to the employed components and parts of top each module, provide the emitter circuit of the utility model shown in figure 28 at last, the receiving system circuit is shown in figure 29.
1 port of P2 interface connects adapter output 15V output, 2,3 port ground connection in the emitter circuit diagram; L1 interface sending and receiving ray circle.P1 interface in the receiving system links to each other with receiving coil; The positive input terminal of charging inlet in the 1 port reception charging device of P2 interface, the negative input end of charging inlet in the 2 ports reception charging device.
The above is merely the preferred embodiments of the utility model; The protection range of the utility model does not exceed with above-mentioned execution mode; As long as the equivalence that those of ordinary skills do according to the utility model institute disclosure is modified or changed, all should include in the protection range of putting down in writing in claims.

Claims (9)

1.一种无线充电装置，其特征在于：该装置包括发射装置和与发射装置耦合的接收装置；  1. A wireless charging device, characterized in that: the device includes a transmitting device and a receiving device coupled with the transmitting device; 所述的发射装置包括： The launcher includes: 分频器：用于将外部晶振发出的高频信号进行分频，并将分频后的信号送入功率开关控制及初级放大模块； Frequency divider: used to divide the high-frequency signal sent by the external crystal oscillator, and send the frequency-divided signal to the power switch control and primary amplification module; 功率开关控制及初级放大模块：用于对接收的上述分频后的信号进行初级放大得到方波信号，该模块还包括转换开关，用于选择对前级信号放大或者是关断； Power switch control and primary amplification module: used for primary amplification of the received signal after frequency division to obtain a square wave signal. This module also includes a switch for selecting whether to amplify or turn off the previous stage signal; E类功放：用于接收所述被初级放大后的方波信号，作为其驱动信号，经过E类功放进行功率放大后得到大功率信号； Class E power amplifier: used to receive the square wave signal amplified by the primary stage as its driving signal, and obtain a high-power signal after power amplification by the Class E power amplifier; 发射阻抗匹配网络：用于接收所述大功率信号，并直接将该大功率信号直接馈入到发射线圈；发射阻抗匹配网络将发射线圈之后映射过来的等效阻抗变换到E类功放的最佳负载电阻Rs，使得E类功放工作在最佳状态； Transmitting impedance matching network: used to receive the high-power signal and directly feed the high-power signal to the transmitting coil; the transmitting impedance matching network transforms the equivalent impedance mapped after the transmitting coil to the best class E power amplifier The load resistance Rs makes the Class E power amplifier work in the best state; 发射线圈：用于通过共振耦合将大功率信号传递到接收线圈；  Transmitting coil: used to transmit high-power signals to the receiving coil through resonant coupling; 峰值检测模块：用于峰检测阻抗匹配网络中元件上电压的包络峰值； Peak detection module: used for peak detection of the envelope peak value of the voltage on the element in the impedance matching network; 主控单元：用于根据上述电压的包络峰值来判别E类功放的工作状态，在异常状态下，即峰值电压低于阈值，会发出控制信号令功率开关控制及初级放大模块来关闭E类功放；主控单元还用于发出控制信号来控制功率开关控制及初级放大模块的转换开关，使得发射装置在待机和工作状态灵活切换；主动单元还用于控制指示灯及蜂鸣器； Main control unit: It is used to judge the working state of the class E power amplifier according to the envelope peak value of the above voltage. In an abnormal state, that is, the peak voltage is lower than the threshold, a control signal will be sent to control the power switch and the primary amplifier module to turn off the class E power amplifier. Power amplifier; the main control unit is also used to send control signals to control the power switch control and the switch of the primary amplifying module, so that the transmitting device can be flexibly switched between standby and working states; the active unit is also used to control the indicator light and buzzer; 电平转换模块：用于将主控单元输出的CMOS电平转换为TTL电平，以直接控制功率开关控制及初级放大模块； Level conversion module: used to convert the CMOS level output by the main control unit to TTL level, so as to directly control the power switch control and the primary amplification module; 指示灯及蜂鸣器：用于通知用户随时了解该充电装置的工作状态； Indicator light and buzzer: used to inform the user to know the working status of the charging device at any time; 所述的接收装置包括： The receiving device includes: 接收线圈：用于用过耦合接收发射线圈发送的大功率信号； Receiving coil: used to receive high-power signals sent by the transmitting coil through coupling; 接收阻抗匹配网络：用于将从接收线圈映射过来的等效阻抗变换到接收负载电阻，此处的接收负载电阻表示经过整流模块和稳压模块之后的待充电负载的等效电阻，使得接收线圈接收到的功率传输到待充电设备中； Receiving impedance matching network: used to convert the equivalent impedance mapped from the receiving coil to the receiving load resistance, where the receiving load resistance represents the equivalent resistance of the load to be charged after the rectification module and the voltage stabilizing module, so that the receiving coil The received power is transmitted to the device to be charged; 整流模块：用于将接收到的大功率信号变换为直流电； Rectifier module: used to transform the received high-power signal into direct current; 稳压模块：用于将接收的直流电变成恒压直流电。 Voltage stabilizing module: used to convert the received direct current into constant voltage direct current. 2.根据权利要求1所述的无线充电装置，其特征在于：发射线圈和接收线圈之间采用共振磁耦合，属于近场耦合。 2. The wireless charging device according to claim 1, characterized in that: the resonant magnetic coupling is adopted between the transmitting coil and the receiving coil, which belongs to near-field coupling. 3.根据权利要求1所述的无线充电装置，其特征在于：E类功放是将前级提供的方波信号放大到待充电设备正常充电功率的1.3-1.7倍，E类功放包括N沟道场效应管N-MosFet、第一扼流电感L、第二扼流电感Lt、第一电容C1和第二电容C；  3. The wireless charging device according to claim 1, characterized in that: the class E power amplifier amplifies the square wave signal provided by the previous stage to 1.3-1.7 times the normal charging power of the device to be charged, and the class E power amplifier includes an N-channel dojo Effect tube N-MosFet, first choke inductance L, second choke inductance Lt, first capacitor C1 and second capacitor C; 其中第二扼流电感Lt位于电源Vcc与N沟道场效应管N-MosFet的漏端之间，第一电容C1位于N沟道场效应管N-MosFet的漏端与地之间，第二电容C和第一扼流电感L串联，第二电容C和第一扼流电感L分别位于N-MosFet的漏端与输出端口之间。 The second choke inductance Lt is located between the power supply Vcc and the drain terminal of the N-channel field effect transistor N-MosFet, the first capacitor C1 is located between the drain terminal of the N-channel field effect transistor N-MosFet and the ground, and the second capacitor C It is connected in series with the first choke inductance L, and the second capacitor C and the first choke inductance L are respectively located between the drain terminal and the output port of the N-MosFet. 4.根据权利要求1所述的无线充电装置，其特征在于：发射阻抗匹配网络、发射线圈、接收线圈及接收阻抗匹配网络组成网络传输， 4. The wireless charging device according to claim 1, characterized in that: the transmitting impedance matching network, the transmitting coil, the receiving coil and the receiving impedance matching network form a network transmission, 定义效率最佳等效发射阻抗 Zeqt为“当传输效率达到最大时从发射线圈向接收线圈看过去的等效阻抗”， Define the best efficiency equivalent transmitting impedance Z eqt as "the equivalent impedance seen from the transmitting coil to the receiving coil when the transmission efficiency reaches the maximum", 定义效率最佳等效接收阻抗Zeqr为“当传输效率最大时从接收线圈向带充电负载看过去的等效阻抗”： The optimal equivalent receiving impedance Z eqr is defined as "the equivalent impedance seen from the receiving coil to the charged load when the transmission efficiency is maximum":
Figure DEST_PATH_IMAGE004A
Figure DEST_PATH_IMAGE004A
 其中，RS是功率源最佳负载电阻，RL是接收负载电阻，k是发射线圈和接收线圈之间的耦合系数，ω是整个无线能量传输装置的工作角频率，Lt是发射线圈自感，Lr是接收线圈自感，Rpt是发射线圈损耗电阻， Rpr是接收线圈损耗电阻，Reqr是效率最佳等效接收电阻,Reqt是效率最佳等效发射电阻，Xeqr是效率最佳等效接收电抗，Xeqt是效率最佳等效发射电抗，j是虚数单位。 Among them, R S is the optimal load resistance of the power source, RL is the receiving load resistance, k is the coupling coefficient between the transmitting coil and the receiving coil, ω is the working angular frequency of the whole wireless energy transmission device, L t is the self- Inductance, L r is the self-inductance of the receiving coil, R pt is the loss resistance of the transmitting coil, R pr is the loss resistance of the receiving coil, R eqr is the equivalent receiving resistance with the best efficiency, R eqt is the equivalent transmitting resistance with the best efficiency, X eqr is the equivalent receiving reactance with the best efficiency, X eqt is the equivalent transmitting reactance with the best efficiency, and j is the imaginary unit. 5.根据权利要求4所述的无线充电装置，其特征在于：当效率最佳等效接收电阻Reqr等于接收负载电阻RL时，或当效率最佳等效发射电阻Reqt等于功率源最佳负载电阻RS时，发射阻抗匹配网络和接收阻抗匹配网络采用一元件的B1型阻抗匹配网络或B2型阻抗匹配网络。 5. The wireless charging device according to claim 4, characterized in that: when the equivalent receiving resistance Reqr with the best efficiency is equal to the receiving load resistance RL , or when the equivalent transmitting resistance Reqt with the best efficiency is equal to the optimal load of the power source When the resistor R S is used, the transmitting impedance matching network and the receiving impedance matching network use a B1-type impedance matching network or a B2-type impedance matching network. 6. 根据权利要求4所述的无线充电装置，其特征在于：当效率最佳等效接收电阻Reqr小于接收负载电阻RL时，或当效率最佳等效发射电阻Reqt小于功率源最佳负载电阻RS时，发射阻抗匹配网络和接收阻抗匹配网络采用两元件的AL1型阻抗匹配网络、AL2型阻抗匹配网络、AL3型阻抗匹配网络、及AL4型阻抗匹配网络中的任一种；或者 6. The wireless charging device according to claim 4, characterized in that: when the equivalent receiving resistance Reqr with the best efficiency is smaller than the receiving load resistance RL , or when the equivalent transmitting resistance Reqt with the best efficiency is smaller than the maximum power source resistance When the load resistance R S is the best, the transmitting impedance matching network and the receiving impedance matching network adopt any one of the two-element AL1-type impedance matching network, AL2-type impedance matching network, AL3-type impedance matching network, and AL4-type impedance matching network; or 当效率最佳等效接收电阻Reqr小于接收负载电阻RL时，或当效率最佳等效发射电阻Reqt小于功率源最佳负载电阻RS时，发射阻抗匹配网络和接收阻抗匹配网络采用三元件的APi1型阻抗匹配网络、APi2型阻抗匹配网络、APi3型阻抗匹配网络、APi4型阻抗匹配网络、AT1型阻抗匹配网络、AT2型阻抗匹配网络、AT3型阻抗匹配网络、AT4型阻抗匹配网络、及AT5型阻抗匹配网络中的任一种。 When the equivalent receiving resistance Reqr with the best efficiency is less than the receiving load resistance RL , or when the equivalent transmitting resistance Reqt with the best efficiency is less than the best load resistance R S of the power source, the transmitting impedance matching network and the receiving impedance matching network adopt Three-element APi1 impedance matching network, APi2 impedance matching network, APi3 impedance matching network, APi4 impedance matching network, AT1 impedance matching network, AT2 impedance matching network, AT3 impedance matching network, AT4 impedance matching network , and any of the AT5 impedance matching networks. 7.根据权利要求4所述的无线充电装置，其特征在于：当效率最佳等效接收电阻Reqr大于接收负载电阻RL时，或当效率最佳等效发射电阻Reqt大于功率源最佳负载电阻RS时，发射阻抗匹配网络和接收阻抗匹配网络采用两元件的CL1型阻抗匹配网络及CL2型阻抗匹配网络；或者 7. The wireless charging device according to claim 4, characterized in that: when the equivalent receiving resistance Reqr with the best efficiency is greater than the receiving load resistance RL , or when the equivalent transmitting resistance Reqt with the best efficiency is greater than the maximum power source When the load resistance R S is the best, the transmitting impedance matching network and the receiving impedance matching network adopt a two-component CL1-type impedance matching network and a CL2-type impedance matching network; or 当效率最佳等效接收电阻Reqr大于接收负载电阻RL时，或当效率最佳等效发射电阻Reqt大于功率源最佳负载电阻RS时，发射阻抗匹配网络和接收阻抗匹配网络采用三元件的CPi1型阻抗匹配网络、CPi2型阻抗匹配网络、CT1型阻抗匹配网络、CT2型阻抗匹配网络、CT3型阻抗匹配网络、及CT4型阻抗匹配网络中的任一种。 When the equivalent receiving resistance Reqr with the best efficiency is greater than the receiving load resistance RL , or when the equivalent transmitting resistance Reqt with the best efficiency is greater than the optimal load resistance R S of the power source, the transmitting impedance matching network and the receiving impedance matching network adopt Any one of three-element CPi1-type impedance matching network, CPi2-type impedance matching network, CT1-type impedance matching network, CT2-type impedance matching network, CT3-type impedance matching network, and CT4-type impedance matching network. 8.根据权利要求5-7任一所述的无线充电装置，其特征在于：每种类型的阻抗匹配网络中的第一端口Port1用于连接接收线圈或者发射线圈；第二端口Port2用于连接接收装置的接收负载电阻RL或者发射装置的功率源最佳负载电阻Rs。 8. The wireless charging device according to any one of claims 5-7, characterized in that: the first port Port1 in each type of impedance matching network is used to connect the receiving coil or the transmitting coil; the second port Port2 is used to connect The receiving load resistance RL of the receiving device or the optimal load resistance R s of the power source of the transmitting device. 9.根据权利要求1所述的无线充电装置，其特征在于：峰值检测模块用来拾取发射阻抗匹配网络上元件的电压峰值，通过一个峰值检测电路来拾取阻抗匹配网络上元件的电压峰值，输出的直流先经过一个运算放大器来提高带负载能力，之后再通过另外一个运算放大器组成的反向放大器加减法器后，输出给单片机输入/输出口，单片机通过判定所获取值的大小来判断功放的工作状态；其中正向放大器正输入端连接的一个可变电阻用于在实际电路中根据实际情况对检测电路进行调节，以便正确地检测电路的工作状态。 9. The wireless charging device according to claim 1, characterized in that: the peak detection module is used to pick up the voltage peak value of the components on the transmission impedance matching network, pick up the voltage peak value of the components on the impedance matching network through a peak detection circuit, and output The direct current passes through an operational amplifier to improve the load capacity, and then passes through another operational amplifier composed of an inverse amplifier adder and subtractor, and then outputs to the input/output port of the single-chip microcomputer. The single-chip microcomputer judges by judging the value obtained The working state of the power amplifier; a variable resistor connected to the positive input terminal of the positive amplifier is used to adjust the detection circuit according to the actual situation in the actual circuit, so as to correctly detect the working state of the circuit.
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Cited By (11)

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CN102355032A (en) * 2011-11-01 2012-02-15 东南大学 Wireless charging device
CN102946133A (en) * 2012-11-11 2013-02-27 国家电网公司 Non-contact type power supply device
CN104104139A (en) * 2014-07-24 2014-10-15 中国矿业大学(北京) Wireless power transmission based mining electric locomotive charging device and method
US9590525B2 (en) 2014-07-03 2017-03-07 Eaton Capital Wireless power transfer systems using load feedback
CN106560976A (en) * 2016-06-27 2017-04-12 中兴新能源汽车有限责任公司 Wireless charging transmitting system and wireless charging receiving system
US9979205B2 (en) 2015-08-18 2018-05-22 Eaton Capital Unlimited Company Methods and circuits configured to provide for multi-phase wireless power transfer
US9984815B2 (en) 2014-12-22 2018-05-29 Eaton Capital Unlimited Company Wireless power transfer apparatus and power supplies including overlapping magnetic cores
US10038324B2 (en) 2015-01-06 2018-07-31 Eaton Intelligent Power Limited Methods, circuits and articles of manufacture for controlling wireless power transfer responsive to controller circuit states
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102355032A (en) * 2011-11-01 2012-02-15 东南大学 Wireless charging device
CN102946133A (en) * 2012-11-11 2013-02-27 国家电网公司 Non-contact type power supply device
US10116230B2 (en) 2013-12-30 2018-10-30 Eaton Capital Unlimited Company Methods, circuits and articles of manufacture for configuring DC output filter circuits
US9590525B2 (en) 2014-07-03 2017-03-07 Eaton Capital Wireless power transfer systems using load feedback
CN104104139A (en) * 2014-07-24 2014-10-15 中国矿业大学(北京) Wireless power transmission based mining electric locomotive charging device and method
US9984815B2 (en) 2014-12-22 2018-05-29 Eaton Capital Unlimited Company Wireless power transfer apparatus and power supplies including overlapping magnetic cores
US10978244B2 (en) 2014-12-22 2021-04-13 Eaton Intelligent Power Limited Wireless power transfer apparatus and power supplies including overlapping magnetic cores
US10038324B2 (en) 2015-01-06 2018-07-31 Eaton Intelligent Power Limited Methods, circuits and articles of manufacture for controlling wireless power transfer responsive to controller circuit states
US10116144B2 (en) 2015-05-22 2018-10-30 Eaton Intelligent Power Limited Wireless power transfer apparatus using enclosures with enhanced magnetic features and methods of fabricating the same
US9979205B2 (en) 2015-08-18 2018-05-22 Eaton Capital Unlimited Company Methods and circuits configured to provide for multi-phase wireless power transfer
CN106560976A (en) * 2016-06-27 2017-04-12 中兴新能源汽车有限责任公司 Wireless charging transmitting system and wireless charging receiving system
CN106560976B (en) * 2016-06-27 2023-09-01 中兴新能源汽车有限责任公司 Wireless charging transmitting system and wireless charging receiving system
US11990766B2 (en) 2019-07-02 2024-05-21 Eaton Intelligent Power Limited Wireless power transfer apparatus with radially arrayed magnetic structures

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