CN108390472A - A kind of non-contact energy and signal synchronous transmission system and transmission method - Google Patents
A kind of non-contact energy and signal synchronous transmission system and transmission method Download PDFInfo
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- CN108390472A CN108390472A CN201810195763.4A CN201810195763A CN108390472A CN 108390472 A CN108390472 A CN 108390472A CN 201810195763 A CN201810195763 A CN 201810195763A CN 108390472 A CN108390472 A CN 108390472A
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- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 5
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- 238000006243 chemical reaction Methods 0.000 claims description 3
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- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 2
- 235000011613 Pinus brutia Nutrition 0.000 claims description 2
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- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical group [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 claims 1
- 230000008054 signal transmission Effects 0.000 abstract description 14
- 238000005516 engineering process Methods 0.000 abstract description 8
- 239000000284 extract Substances 0.000 abstract description 5
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- 229910000859 α-Fe Inorganic materials 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000009351 contact transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
- H04B5/26—Inductive coupling using coils
- H04B5/263—Multiple coils at either side
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/72—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for local intradevice communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The invention discloses the energy and signal synchronous transmission system and transmission method in a kind of wireless power transmission technology, suitable for wireless charging field, the system includes DC power supply, high-frequency inverter, primary side energy transmitting module, signal modulation module, secondary side energy acceptance module, signal demodulation module and load；Series connection access capacitance and primary side energy transmitting module after high-frequency inverter, constitute triangular wave and extract channel；Baseband signal is loaded into triangular wave by signal modulation module by changing high-frequency inverter working frequency, by loosely coupled transformer by energy and signal simultaneous transmission to secondary side, by secondary side energy acceptance module and signal demodulation module by the energy and Signal separator in channel, energy and signal synchronous transfer are realized.System output power is stablized, and signal transmission rate is high, and system bulk is small.
Description
Technical field
The present invention relates to a kind of energy and signal synchronous transmission system and transmission method, are particularly suitable for a kind of non-contact energy
Amount and signal synchronous transmission system and transmission method.
Background technology
Traditional method of electric energy transfer be by cable etc. connect equipment by electric energy from electrical grid transmission to electrical equipment, and this
Kind of physical connection can because regular movement and it is exposed generate electric spark or breakage outside, this is not only substantially reduced electrically
The service life of equipment also seriously threatens electrical safety, the especially occasion in the bad environments such as coal mine, underwater, even
It can cause serious electrical hazard.Therefore, under current this form, the demand of non-contact type electric energy transmission technology carries significantly
It is high.Transmitting non-contact electric energy technology no longer needs cable etc. to connect equipment as its name suggests, between power supply unit and electrical equipment,
Largely solves the deficiency that traditional power supply mode uses in harsh environment.Transmitting non-contact electric energy technology is extensive at present
Fields, the amounts of needing not only to such as tramcar, the mobile phone wireless charging of application provide power for system, it is also necessary to the synchronization of signal
It transmits to transmit the operating status of control instruction, reponse system, such as the rotary joint of robot, human organ.At present extensively
The non-contact energy of research is broadly divided into following several with signal synchronous transmission technology：
1, the transmission of energy and Signal separator channel transfer, energy and signal respectively uses independent channel.This method is
Using two groups of different coils and driving circuit, independent electric energy and signal transmission are carried out respectively, but between multiple coils
Intercouple electric energy transmission had an impact and the bit error rate of signal transmission is made to increase；
2, pouring-in amplitude-modulating modulation.It is coupled on inverter output square-wave voltage high frequency carrier to by coupling coil and carried out
The synchronous transfer of energy and signal.But this method is that the load of signal is carried out in the positive half cycle of Inverter Square Wave, signal passes
Defeated rate is relatively low；
3, amplitude-modulating modulation.This method is by adding HVDC Modulation mould in inductive power transfer system direct current input side
It is inverse to change by the duty ratio for changing chopper circuit that Boost circuit is added in block that is, between DC power supply and high-frequency inverter
Become the input of device front end direct current, the amplitude envelops of voltage carry signal characteristic, and the envelope that carrier wave is completed by envelope detector carries
It takes, recovers digital signal using filtering comparison circuit, the DC converting link in this method makes the exponent number in system increase, shadow
The stability of system is rung.
For the mode of several energy and signal synchronous transfer set forth above, signal transmission rate is generally all relatively low,
And influence is also produced on the transmission of system capacity.
Invention content
Shortcoming in view of the above technology, provides that a kind of complexity in circuits is low, does not add additional loose coupling magnetic
Road mechanism, reduce coil between intercouple, effectively improve system capacity output stability non-contact energy and signal
Synchronous transmission system and transmission method,
To realize the above-mentioned technical purpose, non-contact energy of the invention and signal synchronous transmission system, including DC power supply,
High-frequency inverter, primary side energy transmitting module, secondary side receiving module, load, signal modulation module and signal demodulation module；
The input terminal of the high-frequency inverter is connected with DC power supply, and output end and the primary side energy of high-frequency inverter are sent out
The input terminal for penetrating module is connected, and primary side energy transmitting module extracts triangle from the Inverter Square Wave that high-frequency inverter exports
Wave, and triangular wave is made of a series of odd harmonics, primary side energy transmitting module is connected with secondary side receiving module, and secondary side connects
It includes energy receptor portions and signal receiving part point to receive module, and wherein energy receptor portions setting is humorous under triangular wave fundamental frequency
Shake and transfer energy to load, energy is provided for load, and signal receiving part set up separately set it is humorous under triangular wave third harmonic frequencies
It shakes signal and energy separation, the input terminal of signal demodulation module is connected with secondary side receiving module, is received by detecting signal
Coil both end voltage simultaneously passes to the demodulation that signal demodulation module carries out signal, to complete signal with energy from primary side to secondary side
Contactless synchronous transfer；
Primary side energy transmitting module is extracted from Inverter Square Wave by reducing itself quality factor by a series of odd-times
The triangular wave that harmonic wave is constituted, fundamental wave and triple-frequency harmonics content are higher in triangular wave, using the fundamental wave transmission energy in triangular wave, three
Subharmonic transmits signal.
The high-frequency inverter is the full-bridge inverting structure that four bipolar transistors are constituted, defeated with the power for obtaining bigger
Go out.
The primary side energy transmitting module includes concatenated capacitance CbWith primary side transmitting coil Lp, by reducing it
Quality factor extract triangular wave, capacitance C from Inverter Square WavebA little DC component present in filtering appts, and lead to
Cross energy transmitting coil LpWith energy receiving coil LsTriangular wave simultaneously comprising energy and signal is transmitted to secondary side and receives mould
Block.
The energy receptor portions of the secondary side receiving module include the energy receiving coil L being serially connectedsAnd compensation electricity
Hold Cs, signal receiving part point includes the signal receiving coil L being linked in sequencen, compensating electric capacity CnAnd receiving coil internal resistance Rn, wherein
Energy receiving coil LsWith its resonant capacitance CsResonance transfers energy to load under triangular wave fundamental frequency, and signal receives line
Enclose LnWith its resonant capacitance CnResonance transmits signals to signal demodulation module and carries out signal solution under triangular wave third harmonic frequencies
It adjusts.
Energy receiving coil LsIt is load supplying that electric energy is induced in high-frequency alternating magnetic field, and the transmission of energy and signal is just
It is by primary side transmitting coil LpWith energy receiving coil LsThe conversion for carrying out electricity-magnetic-electricity transmits it to secondary side receiving module,
Then energy is detached with signal；Energy receiving coil LsWith primary side energy transmitting coil LpTurn to " time " type MnZn
FERRITE CORE forms loosely coupled transformer, energy receiving coil LsWith compensating electric capacity CsLow resistive state is presented under fundamental frequency,
To extract fundamental wave from triangular wave energy, signal receiving coil L are provided for loadnWith compensating electric capacity CnUnder triple-frequency harmonics
Low resistive state is presented, signal receiving coil L is caused according to the difference of inverter working frequency to isolate triple-frequency harmonicsnTwo
Terminal voltage difference transmits signals to signal demodulation module, realizes signal from primary side to the wireless transmission on secondary side.
The signal modulation module includes the DSP and driving circuit being linked in sequence, and DSP is according to the baseband signal received
Switch the working frequency of inverter and then changes secondary side signal receiving coil LnThe voltage at both ends transmits signal, and due to secondary side
Energy receptor portions in receiving module have a very high impedance for triple-frequency harmonics, therefore while system transmits signal pair
The influence of energy transmission is negligible.
The signal demodulation module includes the voltage detecting circuit and detecting circuit being linked in sequence；Signal receiving coil Ln
With compensating electric capacity CnHigh-impedance state is presented to fundamental wave in the resonance under triple-frequency harmonics, thus by energy in system and Signal separator, electricity
Press detection circuit by detecting signal receiving coil LnBoth end voltage simultaneously carries out it by detecting circuit envelope detection processing with extensive
Restore side input signal.
A kind of transmission method of non-contact energy and signal synchronous transmission system, its step are as follows：
A. setting signal transport protocol beacon information first, when the signal receiving part sorting in secondary side receiving module measures original
There are when beacon information, illustrate from this moment on from primary side energy for triple-frequency harmonics in the triangular wave of side energy transmitting module transfer
Transmitting module to secondary side receiving module transmits data-signal：The control signal that baseband signal is sent out by DSP controls and changes height
The working frequency of frequency inverter, when transmission data signal is " 1 ", control high-frequency inverter working frequency is f1,；When biography data
When defeated signal is " 0 ", control high-frequency inverter working frequency is f0, digital baseband signal is loaded into primary side energy transmitting module
In；
B. primary side energy transmitting mould primary side energy transmitting coil L in the blockpWith secondary side energy receiving coil LsThe loose coupling of composition
Closing transformer will be simultaneous with the slave primary side energy transmitting coil L of the triangular wave of energy and signal messagepIt is transferred to secondary side energy
Receiving coil Ls；
C. energy receiving coil L when secondary secondary in receiving modulesWith its compensating electric capacity CsIt is issued in triangular wave fundamental frequency
Fundamental wave Energy extraction is out supplied to load, signal receiving coil L by raw series resonancenWith its compensating electric capacity CnIn triangular wave three
Resonance under subfrequency constitutes triple-frequency harmonics channel, signal message is isolated from triangular wave, by signal receiving coil LnTwo
Signal is demodulated in the voltage detecting circuit and detecting circuit of terminal voltage access signal demodulation module, to restore base band
Signal.
Advantageous effect, compared to above-mentioned energy and signal transmission technology, this programme is to utilize the fundamental wave transmission energy in system
Amount, harmonic propagation signal reach the synchronous transfer of energy and signal in system, and to realize reduce power quality in current harmonic wave
Under overall situation, without filtering out harmonic wave, efficiently uses harmonic wave and carry out signal transmission, improve capacity usage ratio.Electric energy and signal from
The non-contact transmission on primary side to secondary side is realized by same a pair of of magnetic path, and the mutual inductance coupling between each coil in circuit is reduced
It closes, improves the stability of system, reduce the bit error rate of signal transmission.It is adjusted by the switching of high-frequency inverter working frequency
Signal extraction coil both end voltage carrys out transmitting digital signals information, since inverter working frequency relatively connects in signals transmission
Closely, therefore during transmitting signal to the transmission of system capacity it not will produce large effect.
Description of the drawings：
Fig. 1 is the circuit diagram of the present invention.
Fig. 2 is the inverter output voltage current waveform figure of the present invention.
Fig. 3 be the present invention signal transmission rate be 5kHz when inverter output voltage and current waveform figure.
Fig. 4 be the present invention signal transmission rate be 5kHz when inverter output voltage and system output current oscillogram.
Fig. 5 be the present invention signal transmission rate be 5kHz when signal extraction coil both end voltage oscillogram.
Fig. 6 be the present invention signal transmission rate be 5kHz when Demodulation Systems after output voltage waveform.
Fig. 7 be the present invention signal transmission rate be 5kHz when input signal and demodulation after output signal.
In figure, 1- DC power supplies；2- high-frequency inverters；3- primary side energy transmitting modules；4- pairs side receiving module；5- is negative
It carries；6- signal modulation modules；7- signal demodulation modules.
Specific implementation mode：
Embodiment is described further below in conjunction with the accompanying drawings：
As shown in Figure 1, the non-contact energy of the present invention and signal synchronous transmission system, including DC power supply 1, high-frequency inversion
Device 2, primary side energy transmitting module 3, secondary side receiving module 4, load 5, signal modulation module 6 and signal demodulation module 7；
The high-frequency inverter 2 is the full-bridge inverting structure that four bipolar transistors are constituted, the input of high-frequency inverter 2
End is connected with DC power supply 1, and the output end of high-frequency inverter 2 is connected with the input terminal of primary side energy transmitting module 3, primary side
Energy transmitting module 3 extracts triangular wave from the high-frequency inversion square wave that high-frequency inverter 2 exports, and triangular wave is by a series of strange
Harmonic wave forms for several times, and primary side energy transmitting module 3 is connected with secondary side receiving module 4, the primary side energy transmitting module 3 packet
Include concatenated capacitance CbWith primary side transmitting coil Lp, triangular wave is extracted from Inverter Square Wave by reducing its quality factor,
Capacitance CbA little DC component present in filtering appts, and pass through energy transmitting coil LpWith energy receiving coil LsIt will
The triangular wave comprising energy and signal is transmitted to secondary side receiving module 4 simultaneously, secondary side receiving module 4 include energy receptor portions with
Signal receiving part point, the energy receptor portions of the secondary side receiving module 4 include the energy receiving coil L being serially connectedsAnd
Compensating electric capacity Cs, signal receiving part point includes the signal receiving coil L being linked in sequencen, compensating electric capacity CnAnd receiving coil internal resistance
Rn, wherein energy receiving coil LsWith its resonant capacitance CsResonance transfers energy to load 5 under triangular wave fundamental frequency, letter
Number receiving coil LnWith its resonant capacitance CnResonance transmits signals to signal demodulation module 7 under triangular wave third harmonic frequencies
Signal demodulation is carried out, wherein energy receptor portions setting resonance under triangular wave fundamental frequency transfers energy to load 5, is negative
It carries 5 and energy is provided, and signal receiving part sets up separately and sets under triangular wave third harmonic frequencies resonance by signal and energy separation, signal
The input terminal of demodulation module 7 is connected with secondary side receiving module 4, by detecting signal receiving coil both end voltage and passing to letter
Number demodulation module 7 carries out the demodulation of signal, to complete signal and contactless synchronous transfer of the energy from primary side to secondary side；
Energy receiving coil LsIt is 5 power supply of load, the transmission of energy and signal that electric energy is induced in high-frequency alternating magnetic field
It is exactly by primary side transmitting coil LpWith energy receiving coil LsThe conversion for carrying out electricity-magnetic-electricity transmits it to secondary side receiving module
4, then energy is detached with signal；Energy receiving coil LsWith primary side energy transmitting coil LpTurn to " time " type manganese
Zn ferrite magnetic core forms loosely coupled transformer, energy receiving coil LsWith compensating electric capacity CsLow-resistance shape is presented under fundamental frequency
State is that load 5 provides energy, signal receiving coil L to extract fundamental wave from triangular wavenWith compensating electric capacity CnHumorous three times
Low resistive state is presented under wave, to isolate triple-frequency harmonics, signal receiving coil is caused according to the difference of inverter working frequency
LnBoth end voltage difference transmits signals to secondary side receiving module 4；
Primary side energy transmitting module 3 is extracted from Inverter Square Wave by reducing itself quality factor by a series of odd-times
The triangular wave that harmonic wave is constituted, fundamental wave and triple-frequency harmonics content are higher in triangular wave, using the fundamental wave transmission energy in triangular wave, three
Subharmonic transmits signal.
The signal modulation module 6 includes the DSP and driving circuit being linked in sequence, and DSP believes according to the base band received
The working frequency of number switching inverter and then change secondary side signal receiving coil LnOn voltage transmit signal, and due to secondary side
Energy receptor portions in receiving module 4 have very high impedance for triple-frequency harmonics, therefore while system transmits signal
Influence to energy transmission is negligible.
The signal demodulation module 7 includes the voltage detecting circuit and detecting circuit being linked in sequence；Signal receiving coil
LnWith compensating electric capacity CnHigh-impedance state is presented to fundamental wave in the resonance under triple-frequency harmonics, thus by energy in system and Signal separator,
Voltage detecting circuit is by detecting signal receiving coil LnBoth end voltage and it is carried out by detecting circuit envelope detection processing with
Restore primary side input signal.
A kind of non-contact energy and signal synchronous transmission method, its step are as follows：
A. setting signal transport protocol beacon information first, when the signal receiving part sorting in secondary side receiving module 4 measures
There are when beacon information, illustrate from this moment on from primary side for triple-frequency harmonics in the triangular wave that primary side energy transmitting module 3 is transmitted
Energy transmitting module 3 to secondary side receiving module 4 transmits data-signal：Baseband signal is controlled simultaneously by the control signal that DSP is sent out
The working frequency for changing high-frequency inverter 2, when transmission data signal is " 1 ", control 2 working frequency of high-frequency inverter is f1,；
When it is " 0 " to pass the defeated signal of data, control 2 working frequency of high-frequency inverter is f0, digital baseband signal is loaded into primary side energy
It measures in transmitting module 3；
B. the primary side energy transmitting coil L in primary side energy transmitting module 3pWith secondary side energy receiving coil LsThe pine of composition
Coupling transformer will be simultaneous with the slave primary side energy transmitting coil L of the triangular wave of energy and signal messagepIt is transferred to secondary side energy
Measure receiving coil Ls；
C. energy receiving coil L when secondary secondary in receiving module 4sWith its compensating electric capacity CsUnder triangular wave fundamental frequency
Series resonance occurs, fundamental wave Energy extraction is out supplied to load 5, signal receiving coil LnWith its compensating electric capacity CnIn triangular wave
Resonance under third harmonic frequencies constitutes triple-frequency harmonics channel, signal message is isolated from triangular wave, by signal receiving coil Ln
Signal is demodulated in the voltage detecting circuit and detecting circuit of both end voltage access signal demodulation module 7, to restore
Baseband signal.
Specific embodiment
As shown in Figure 1, DC power supply 1 generates high-frequency ac voltage square wave after high-frequency inverter 2, work as inverter duty cycle
When being 50%, alternating voltage square wave Fourier's expression formula that inversion goes out is
In formula, UdFor direct current power source voltage value, ω0High-frequency inverter work angular frequency, t is the time.
High-frequency ac square-wave voltage generates triangular current, triangular current Fourier after capacitance and transmitting coil
Decomposing expression formula is
In formula, IpmFor the amplitude of triangular current, k is overtone order.
From the above equation, we can see that containing abundant harmonic wave in triangular current, therefore energy, harmonic propagation letter are transmitted using fundamental wave
Number.Triangular wave flows separately through energy acceptance mould energy receptor portions in the block and signal receiving part point after energy transmitting coil,
By energy and signal synchronous transfer to secondary side network.Energy receptor portions and the parameter designing of signal receiving part point meet
Energy receptor portions：ω0 2LsCs=1 (3)
Signal receiving part point：n2ω0 2LnCn=1 (4)
Wherein, LsFor energy receiving coil, CsFor the compensating electric capacity of energy receiving coil, LnFor signal receiving coil, CnFor
The compensating electric capacity of signal receiving coil, n are overtone order, n=3 in this patent.
By parameter designing, the fundamental wave component in triangular current is transmitted to system by secondary side energy acceptance module 4 and bears
5 are carried, and high resistant is presented to fundamental wave in the signal receiving part point in secondary side receiving module 4, and low-resistance is presented to triple-frequency harmonics ingredient, therefore
Triple harmonic current flows through signal receiving coil.Setting signal transport protocol beacon information first, when in secondary side receiving module 4
Signal receiving part sorting measures the triple-frequency harmonics in the triangular wave of the transmission of primary side energy transmitting module 3 there are when beacon information, says
It is bright to transmit data-signal from primary side energy transmitting module 3 to secondary side receiving module 4 from this moment on：Baseband signal is sent out by DSP
The control signal gone out controls and changes the working frequency of high-frequency inverter 2, and when transmission data signal is " 1 ", control high frequency is inverse
Become 2 working frequency of device as f1,；When it is " 0 " to pass the defeated signal of data, control 2 working frequency of high-frequency inverter is f0, by digital base
Band signal is loaded into primary side energy transmitting module 3；
The loosely coupled transformer of primary side energy transmitting coil and secondary side energy receiving coil composition will simultaneous with energy and
The triangular wave of signal message is transmitted to system pair side；With its compensating electric capacity series resonance occurs for secondary side energy receiving coil by fundamental wave
It extracts and is supplied to load, signal receiving coil and its compensating electric capacity resonance under third harmonic frequencies constitute triple-frequency harmonics
Channel, using signal receiving coil both end voltage as signal voltage and access in voltage detecting circuit and detecting circuit to signal into
Row demodulation.
Fig. 2 is inverter output voltage current waveform figure before signal is added, and Fig. 3 is inverter output electricity after signal is added
Current voltage oscillogram, compare when transmitting signal known to two figures due under signal " 0 " and signal one condition inverter working frequency compared with
It is close, therefore system primary side triangle wave amplitude is influenced smaller；Fig. 4 is the output current wave after signal addition system, profit
With harmonic wave carry out signal be delivered in effectively improve signal transmission rate on the basis of be maximally maintained base wave stability；
Fig. 5 is that system signal reception coil both end voltage oscillogram after signal is added, and signal receiving coil voltage wave before and after signal is added
It is dynamic larger, just meet the condition of signal transmission；Fig. 6 is the oscillogram after output signal demodulation；Fig. 7 is demodulated signal and base band
Signal waveforms, it can be seen from the figure that demodulated signal has a small delay compared with baseband signal, this is because multiple electricity in system
Caused by the time delay that capacitor filter and secondary side processor processing procedure generate.
Claims (8)
1. a kind of non-contact energy and signal synchronous transmission system, it is characterised in that：It includes DC power supply（1）, high-frequency inversion
Device（2）, primary side energy transmitting module（3）, secondary side receiving module（4）, load（5）, signal modulation module（6）With signal solution mode transfer
Block（7）；
The high-frequency inverter（2）Input terminal and DC power supply（1）It is connected, high-frequency inverter（2）Output end and primary side
Energy transmitting module（3）Input terminal be connected, primary side energy transmitting module（3）From high-frequency inverter（2）The inversion side of output
Triangular wave is extracted in wave, and triangular wave is made of a series of odd harmonics, primary side energy transmitting module（3）It is received with secondary side
Module（4）It is connected, secondary side receiving module（4）Including energy receptor portions and signal receiving part point, wherein energy receptor portions
Resonance is set under triangular wave fundamental frequency and transfers energy to load（5）, for load（5）Offer energy, and signal receiving part
Set up separately and sets under triangular wave third harmonic frequencies resonance by signal and energy separation, signal demodulation module（7）Input terminal with it is secondary
Side receiving module（4）It is connected, by detecting signal receiving coil both end voltage and passing to signal demodulation module（7）Carry out letter
Number demodulation, to complete signal and contactless synchronous transfer of the energy from primary side to secondary side；
Primary side energy transmitting module（3）By reduce itself quality factor extracted from Inverter Square Wave it is humorous by a series of odd-times
The triangular wave that wave is constituted, fundamental wave and triple-frequency harmonics content are higher in triangular wave, using the fundamental wave transmission energy in triangular wave, three times
Harmonic propagation signal.
2. non-contact energy as described in claim 1 and signal synchronous transmission system, it is characterized in that：The high-frequency inverter
（2）For four bipolar transistors constitute full-bridge inverting structure, to obtain the power output of bigger.
3. non-contact energy as described in claim 1 and signal synchronous transmission system, it is characterized in that：The primary side energy hair
Penetrate module（3）Including concatenated capacitanceC bWith primary side transmitting coilL p, carried from Inverter Square Wave by reducing its quality factor
Take out triangular wave, capacitanceC bA little DC component present in filtering appts, and pass through energy transmitting coilL pIt is connect with energy
Take-up circleL sTriangular wave simultaneously comprising energy and signal is transmitted to secondary side receiving module（4）.
4. non-contact energy as described in claim 1 and signal synchronous transmission system, it is characterized in that：The secondary side receives mould
Block（4）Energy receptor portions include the energy receiving coil being serially connectedL sAnd compensating electric capacityC s, signal receiving part point includes suitable
The signal receiving coil of sequence connectionL n, compensating electric capacityC nAnd receiving coil internal resistanceR n, wherein energy receiving coilL sWith its resonance electricity
HoldC sResonance transfers energy to load under triangular wave fundamental frequency（5）, signal receiving coilL nWith its resonant capacitanceC nThree
Resonance transmits signals to signal demodulation module under the wave third harmonic frequencies of angle（7）Carry out signal demodulation.
5. non-contact energy as described in claim 3 or 4 and signal synchronous transmission system, it is characterized in that：Energy receiving coilL s
It is load that electric energy is induced in high-frequency alternating magnetic field（5）Power supply, the transmission of energy and signal are exactly to pass through primary side transmitting coilL pAnd energy receiving coilL sThe conversion for carrying out electricity-magnetic-electricity transmits it to secondary side receiving module（4）, then by energy and signal
It is detached；Energy receiving coilL sWith primary side energy transmitting coilL pTurn to " time " type manganese-zinc ferrite core composition pine
Coupling transformer, energy receiving coilL sWith compensating electric capacityC sLow resistive state is presented under fundamental frequency, to be carried from triangular wave
It is load to take out fundamental wave（5）Energy, signal receiving coil are providedL nWith compensating electric capacityC nLow resistive state is presented under triple-frequency harmonics,
To isolate triple-frequency harmonics, signal receiving coil is caused according to the difference of inverter working frequencyL nBoth end voltage difference will be believed
Number it is transferred to signal demodulation module（7）, realize signal from primary side to the wireless transmission on secondary side.
6. non-contact energy as described in claim 1 and signal synchronous transmission system, it is characterized in that：The signal modulation mould
Block（6）Including the DSP and driving circuit being linked in sequence, DSP switches the working frequency of inverter according to the baseband signal received
And then change secondary side signal receiving coilL nThe voltage at both ends transmits signal, and due to secondary side receiving module（4）In energy
Receiving portion has very high impedance for triple-frequency harmonics, therefore the influence to energy transmission while system transmits signal can
It ignores.
7. non-contact energy as described in claim 1 and signal synchronous transmission system, it is characterized in that：The signal solution mode transfer
Block（7）Including the voltage detecting circuit and detecting circuit being linked in sequence；Signal receiving coilL nWith compensating electric capacityC nIn triple-frequency harmonics
High-impedance state is presented to fundamental wave in lower resonance, to which by energy in system and Signal separator, voltage detecting circuit is by detecting signal
Receiving coilL nBoth end voltage simultaneously carries out it by detecting circuit envelope detection processing to restore primary side input signal.
8. a kind of transmission method using non-contact energy and signal synchronous transmission system described in claim 1, feature exists
In steps are as follows：
A. setting signal transport protocol beacon information first, when secondary side receiving module（4）In signal receiving part sorting measure original
Side energy transmitting module（3）There are when beacon information, illustrate from this moment on from primary side for triple-frequency harmonics in the triangular wave of transmission
Energy transmitting module（3）To secondary side receiving module（4）Transmit data-signal：The control signal control that baseband signal is sent out by DSP
It makes and changes high-frequency inverter（2）Working frequency, when transmission data signal be " 1 " when, control high-frequency inverter（2）Work frequency
Rate isf 1,；When it is " 0 " to pass the defeated signal of data, high-frequency inverter is controlled（2）Working frequency isf 0, digital baseband signal is loaded
To primary side energy transmitting module（3）In；
B. primary side energy transmitting module（3）In primary side energy transmitting coilL pWith secondary side energy receiving coilL sThe loose coupling of composition
Closing transformer will be simultaneous with the slave primary side energy transmitting coil of the triangular wave of energy and signal messageL pIt is transferred to secondary side energy
Receiving coilL s；
C. secondary side receiving module（4）In secondary side energy receiving coilL sWith its compensating electric capacityC sIt is issued in triangular wave fundamental frequency
Fundamental wave Energy extraction is out supplied to load by raw series resonance（5）, signal receiving coilL nWith its compensating electric capacityC nIn triangular wave
Resonance under third harmonic frequencies constitutes triple-frequency harmonics channel, signal message is isolated from triangular wave, by signal receiving coilL n
Both end voltage accesses signal demodulation module（7）Voltage detecting circuit and detecting circuit in signal is demodulated, to restore
Go out baseband signal.
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