CN110022006A - A kind of radio energy signal synchronous transfer and remained capacity time division multiplex system and its control method - Google Patents
A kind of radio energy signal synchronous transfer and remained capacity time division multiplex system and its control method Download PDFInfo
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- CN110022006A CN110022006A CN201910416350.9A CN201910416350A CN110022006A CN 110022006 A CN110022006 A CN 110022006A CN 201910416350 A CN201910416350 A CN 201910416350A CN 110022006 A CN110022006 A CN 110022006A
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
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Abstract
The present invention proposes a kind of radio energy signal synchronous transfer and remained capacity time division multiplex system and its control method, which includes that high-frequency inverter circuit, electric energy transmitting circuit, electric energy receive circuit, signal transmission circuit and signal receiving circuit；Wherein DC voltage is converted into high-frequency ac square wave, electric energy transmitting circuit and signal transmission circuit and is connected to high-frequency inverter circuit output end in form in parallel by high-frequency inverter circuit, selects fundamental wave and nth harmonic respectively from voltage square wave；Electric energy receives circuit and signal receiving circuit and connects via multiplex switch control.Forward and reverse transmission to realize signal is switched on-off by changing signal modulation, and signal demodulation is realized in respective side, the connection type by changing electric energy reception circuit and signal receiving circuit can be realized the multiplexing of two kinds of functions of electric power signal synchronous transfer and remained capacity.The system signal transmission rate is high, and power transmission is stable and remained capacity accuracy is higher.
Description
Technical field
The present invention relates to remained capacity and radio energy signal synchronous transfer field, especially a kind of radio energy signal is same
Step transmission and remained capacity time division multiplex system and its control method.
Background technique
It is known as in a non-contact manner from the technology that power end is transferred to load end using the media implementation energy in space
Wireless power transmission (Wireless Power Transfer, WPT) technology.Compared to traditional wired power supply mode, radio
Energy transmission technology can effectively avoid electric spark bring in the abrasion of multiple plug bring and swapping process because of plug
Danger becomes apparent in the advantages of extraordinary occasion such as coal mine, underwater, wireless power transmission technology.
With the continuous extension of WPT technical applications, there can be the WPT system of universal adaptability by scholars load
Extensive concern.The difference of payload size and property makes system balance network have various forms, to open up to difference
The power control strategy flutterred also has diversity.The electric parameter of system load or operating status occur micro- in many cases,
Small change can all lead to the reduced performance of system, and system crash can be even made when serious, it is therefore desirable to carry out to load online
Identification, and load information can be supplied in real time to system primary side, reasonable control plan is provided further according to load situation of change
Slightly change the adverse effect caused by system to inhibit to load.Therefore above-mentioned function, remained capacity technology and radio to be realized
Both energy signal synchronous transfer (Wireless Power and Signal Transmission, WPST) technologies are wanted and and are had
It.
Remained capacity technology mainly has at present:
1, reflected umpedance is calculated based on energy injection type and the free concussion mode of energy.This method is by controlling inversion
The working condition of device switching tube changes switch state after the certain switch periods of energy injection, so that energy transmitting coil and benefit
It repays capacitor and forms a circuit, circuit is worked in a manner of freely shaking, and regularity decaying is presented in energy；When detecting energy attenuation
It is equivalent anti-can to calculate energy transmitting end in conjunction with the circuit LC free oscillation process for launching circuit current peak and damped cycle
The real part of impedance is penetrated, then payload size can be calculated by reflected umpedance model；
2, the remained capacity technology based on reflected umpedance.By detection primary side resonant network input voltage, loop voltage with
And impedance angle, circuit theory equation is established, reflected umpedance is acquired.For WPT system, in design and computing system parameter,
Since the load end of system is the resonance compensation network an of entirety, from system primary side energy transmitting end, available system always hinders
Anti-, this impedance is known as pickup end to the reflected umpedance of transmitting terminal.The size and property of reflected umpedance can be loaded with end is picked up
Variation and change, and the parameters such as primary current, voltage is caused to change, passes through detection to each section electric parameter and meter
It calculates, obtains the size and property of present load, while controlling to the energy output state of system using corresponding control means
It makes and adjusts, to meet the needs of load, system is made to be in good working order.
And radio energy signal synchronous transmission technology mainly has at present:
1, Dual-channel type electric energy and signal synchronous transmission technology.I.e. electric energy transmits in different channels respectively from signal,
Two groups of coils are set on the former secondary side of system, energy coil and signal coil can be made by transmitting energy and signal, this structure respectively
Between there are electromagnetic interferences；
2, single-channel electric energy and signal synchronous transmission technology.The technology can be divided into time division multiplexing and frequency division multiplexing two again
Kind method, time-division multiplex technology are by carrying out digital modulation to energy carrier wave to system primary side, so that digital signal be loaded
Into system, wherein Ditital modulation method has binary system amplitude shift keying (2ASK), binary frequency shift keying (2FSK) and binary system
Phase-shift keying (2PSK)；Frequency division multiplexing refers to the carrier wave due to energy as signal, can be to energy when carrying out digital modulation
Amount has large effect.
With deepening continuously to wireless power transmission technical research, remained capacity technology undoubtedly becomes researchers'
Pay close attention to object.It will using radio-frequency unit after the completion of existing remained capacity technology or identified off-line mode, or identification
Load information passes to primary side, and the former cannot monitor load information in real time and make reasonable adjustment, and the latter is because of radio communication
There are higher time delay, it is unfavorable for the control of system, therefore by wireless energy signal synchronous transmission technology and remained capacity
Technology combines a kind of effective means that can become load online recognition.
Summary of the invention
Goal of the invention: in order to combine remained capacity technology and energy signal synchronous transmission technology to realize and be supported on
Line identifies in real time, and the present invention proposes a kind of radio energy signal synchronous transfer and remained capacity time division multiplex system and its controlling party
Load information canbe used on line remained capacity and can be sent to system primary side after the completion of identification by method.
Technical solution: to achieve the above object, the present invention proposes following technical scheme:
A kind of radio energy signal synchronous transfer and remained capacity time division multiplex system, comprising: high-frequency inverter circuit 1, former
In electric energy transmitting circuit 2, primary side signal circuit 3, pair, electric energy receives circuit 4 and secondary side signal transmission circuit 5；High frequency is inverse
Direct current power source voltage is converted into high-frequency ac square wave by power transformation road 1；Primary side electric energy transmitting circuit 2 and primary side signal circuit 3
It is connected in parallel on the output end of high-frequency inverter circuit 1, primary side electric energy transmitting circuit 2 extracts from high-frequency ac square wave and is used for transmission electricity
The fundametal compoment of energy, and fundametal compoment is transferred to by secondary side electric energy by electromagnetic coupling and receives circuit 4, secondary side electric energy receives circuit
4 output end connects load；Primary side signal circuit 3 extracted from high-frequency ac square wave be used for transmission signal n times it is humorous
Wave component, and pass through electromagnetic coupling for nth harmonic components to secondary side signal transmission circuit 5；Secondary side electric energy receives 4 He of circuit
Secondary side signal transmission circuit 5 is through multiplex switch S3It links together, as multiplex switch S3When closure, secondary side electric energy receives 4 He of circuit
Secondary side signal transmission circuit 5 is in parallel, realizes electric power signal synchronous transfer function at this time；S3When opening, electric energy receives circuit 4 and pair
Side signal circuit 5 is connected, and realizes remained capacity function at this time；
It is described realize electric power signal synchronous transfer include from primary side to it is secondary while positive transmission and from it is secondary while to the anti-of primary side
To transmission；When carrying out the transmission of electric power signal forward direction, primary side signal circuit 3 receives primary side digital signal, and by primary side number
Secondary side signal transmission circuit 5 is transferred in word signal modulation to nth harmonic component；It is secondary when carrying out electric power signal reverse transfer
Side signal circuit 5 receives secondary sideband digital signal, and secondary sideband digital signal is modulated on nth harmonic component and is transferred to primary side
Signal circuit 3.
Further, the energy transmitting circuit 2 includes resonant inductance La1, resonant capacitance Cp11And Cp12And energy transmitting
Coil Lp1, La1、Cp11、Cp12、Lp1Form LCCL fundamental wave frequency selection circuit；The primary side signal circuit 3 includes resonant inductance
La3, resonant capacitance Cp31、Cp32, transmitting coil Lp3, two-way switch pipe Sp1, modulated resistance Rm11, buffer resistance Rm12, signal it is reversed
Demodulator circuit；Control signaling switch pipe Sp1With modulated resistance Rm11After series connection again with Rm12Parallel connection forms signal forward direction modulation circuit；
La3、Lp3、Cp31、Cp32Form nth harmonic frequency selection circuit, wherein La3、Lp3、Cp32Series connection, Cp31One end connects La3And Lp3Connection
Point, the other end and Cp32Free end be connected；It is parallel to high frequency again after nth harmonic frequency selection circuit series signals forward direction modulation circuit
The output end of inverter circuit 1；The reversed demodulator circuit of signal is connected in parallel on Cp32Both ends, pass through detection Cp32The voltage at both ends is by secondary side
It transmits and demodulates to come to the signal of primary side；It includes: energy receiving coil L that secondary side electric energy, which receives circuit 4,s1, resonant capacitance Cs1, it is negative
Carry resistance RLWith multiplex switch S3Ls1One end passes through Cs1With RLConnection, the other end pass through S3With RLConnection；Secondary side signal transmission circuit
5 include: receiving coil Ls3, series resonant capacitance Cs3, modulated resistance Rm21, buffer resistance Rm22, control signaling switch pipe Ss1, letter
Number forward demodulator circuit；Ss1With Rm21After series connection again with Rm22Parallel connection forms signal back-modulation circuit；Signal back-modulation circuit
One end connects S3With RLTie point, the other end passes sequentially through Cs3、Ls3With Ls1Connection；Signal forward demodulator circuit in parallel is in Cs3
Both ends, pass through detection Cs3Primary side is transmitted to the signal on secondary side and demodulates by the voltage at both ends.
Further, the control signaling switch pipe Sp1And Ss1Structure is identical, is by a metal-oxide-semiconductor and its parasitic body
The alternating current path that diode is constituted.
Further, the high-frequency inverter circuit 1 is the complete of four Metal-Oxide Semiconductor field effect transistors compositions
Bridge inverter main circuit.
The present invention also proposes the control method of a kind of radio energy signal synchronous transfer and remained capacity time division multiplex system,
Comprising steps of
When a. working normally, multiplex switch S3Closure, secondary side electric energy receives circuit 4 and secondary side signal transmission circuit 5 at this time
Parallel connection, primary side signal circuit 3 will not influence electric energy normal transmission；
B. the signal forward direction modulation when system needs to carry out remained capacity, first in control primary side signal circuit 3
Circuit sends a specific enabling signal, after demodulating enabling signal in secondary side signal transmission circuit 5, starts to carry out load knowledge
Not；
C. remained capacity stage one: detection secondary circuit load terminal voltage and size of current and phase relation first utilize
Digital signal processor judges load characteristic: if phase difference is zero, for resistive load；If phase difference is greater than zero, for perception
Load；If phase difference is less than zero, for capacitive load；It is fundamental wave frequency based on the natural resonance frequency that secondary side electric energy receives circuit 4
Rate builds fundamental wave load equation:
I in formulap1onIndicate multiplex switch S3The electric energy transmitting coil electric current of primary side electric energy transmitting circuit 2, I when closures1onTable
Show multiplex switch S3Load current when closure, M1The electric energy transmitting coil and secondary side electric energy for indicating primary side electric energy transmitting circuit 2 connect
The mutual inductance between the electric energy receiving coil in circuit 4 is received, R, L are the resistance value and inductance value of load to be asked respectively；
D. remained capacity stage two: multiplex switch S is disconnected3, secondary side electric energy receives circuit 4 and secondary side signal transmission circuit
(5) cascaded structure is formed, the electric current in load is that primary side electric energy transmitting circuit 2 and primary side signal circuit 3 are made jointly at this time
With and generate；Fundamental wave load equation is built again:
In formula, Ip1offIndicate multiplex switch S3The electric energy transmitting coil electric current of primary side electric energy transmitting circuit 2 when disconnection, Re
It is the resistance value in parallel of signal modulation resistance, Re=Rm21||Rm22, X indicate 2 independent role of primary side electric energy transmitting circuit when pair side believe
The fundamental wave equivalent impedance of number transmission circuit 5,
E. simultaneous equations (1) and (2) can calculate the resistance value and reactance value of load；
F. multiplex switch S is closed after the completion of remained capacity3, control the signal back-modulation in secondary side signal transmission circuit 5
Circuit sending signal is transmitted to system primary side through load information, and secondary side signal transmission circuit 5 is used to send signal, primary side letter at this time
Number transmission circuit 3 is used to receive signal.
The utility model has the advantages that compared with prior art, present invention has the advantage that
1) signal transmission of the present invention and energy transmission are decoupling controls, and signal transmits the fluctuation that not will cause energy, energy
Transmission will not to signal transmit have interference；
2) present invention can be realized the transmission of signal semiduplex mode, i.e. signal can transmit from primary side to secondary side, also can
It is enough to be transmitted from secondary side to primary side；
3) present invention can according to need multiplexing and realize two kinds of functions of energy signal synchronous transfer and remained capacity；
4) online recognition of load and the real-time delivery of identification information may be implemented in the present invention.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention；
Fig. 2 is inverter output voltage, fundamental wave emission current and the load voltage waveform figure when present invention works normally；
Fig. 3 is main waveform when signal forward direction is transmitted in the present invention, and wherein Fig. 3 (a) is inverter output voltage, fundamental wave hair
Radio stream and load voltage waveform figure, Fig. 3 (b) are that primary side sends signal, secondary side demodulation signal figure；
Fig. 4 is main waveform when carrying out remained capacity in the present invention, and wherein Fig. 4 (a) is inverter output voltage, fundamental wave hair
Current waveform figure is penetrated, Fig. 4 (b) is secondary current waveform figure；
Fig. 5 is the main waveform that signal reverse transfer is in the present invention, and wherein Fig. 5 (a) is inverter output voltage, fundamental wave hair
Radio stream and load voltage waveform, Fig. 5 (b) are that secondary side sends signal and primary side demodulation signal figure.
Specific embodiment
The present invention will be further explained with reference to the accompanying drawing.
As shown in Figure 1, energy signal synchronous transfer of the invention and remained capacity time division multiplex system, including high-frequency inversion
Circuit 1, primary side electric energy transmitting circuit 2, primary side signal circuit 3, secondary side electric energy receive circuit 4 and secondary side signal transmission circuit
5。
1 output end of high-frequency inverter circuit is connected with primary side electric energy transmitting circuit 2, primary side signal circuit 3 respectively, former
Side energy transmitting circuit 2 is connected with the input terminal of primary side signal circuit 3, and the two forms parallel network；Primary side energy transmitting
Circuit 2 selects fundamental wave from the square-wave voltage that high-frequency inverter circuit 1 exports to transmit energy；Primary side signal circuit 3 wraps
Nth harmonic frequency selection circuit and modulating and demodulating signal circuit are included, selects nth harmonic from output square wave to transmit signal；Secondary side
It includes first-harmonic resonance circuit and multiplex switch, opening and closing according to the demand control multiplex switch of system that electric energy, which receives circuit 4,
Break to determine to carry out remained capacity or signal transmission；The secondary side signal transmission circuit 5 is connected in parallel on multiplex switch both ends, by n
Subharmonic frequency selection circuit and modulation-demodulation circuit composition.
It is specific:
High-frequency inverter circuit 1 is four Metal-Oxide Semiconductor field effect transistors
The full-bridge that (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET) is constituted
Formula inverter circuit can obtain higher power output.
Primary side electric energy transmitting circuit 2 is resonant inductance La1, parallel resonance capacitor Cp11, series resonant capacitance Cp12It is sent out with energy
Ray circle Lp1The LCCL type resonance circuit of composition forms, and natural resonance frequency is high-frequency inverter working frequency (i.e. fundamental wave frequency
Rate).Compared to other compensation circuits such as tandem type, parallel connection type, LCCL type resonance circuit has better selecting frequency characteristic, Neng Gougeng
Fundamental wave and nth harmonic are extracted from inverter output voltage well.
Primary side signal circuit 3 is by resonant inductance La3, resonant capacitance Cp31, resonant capacitance Cp32And signal transmitting coil
Lp3It is constituted with modulation-demodulation circuit.Resonance circuit is similarly LCCL type complex resonant circuit, and natural resonance frequency is nth harmonic frequency
Rate.Signal modulation circuit is by modulated resistance Rm11, buffer resistance Rm12It is formed with two-way switch, modulated resistance resistance value is smaller, is used to
Change current amplitude, buffer resistance resistance value is larger, for absorbing dash current when switch, MOSFET and its parasitic body diode
Alternating current path is constituted, when transmitting signal to secondary side from primary side, passes through turning on and off come simulation numeral letter for control MOSFET
Number " 0 " and " 1 ".Signal demodulating circuit is then mainly made of diode detection circuit and comparison circuit, detects capacitor Cp32Both ends
Voltage realizes the demodulation that signal is sent to secondary side.
It is energy receiving coil L that secondary side electric energy, which receives circuit 4,s1, resonant capacitance Cs1, load resistance RLWith multiplex switch S3Group
At.Its natural resonance frequency is system fundamental frequency, multiplex switch S3Effect be control system working condition, pass through control S3
Different phase of opening and close at realize energy signal synchronous transfer and remained capacity function.
Secondary side signal transmission circuit 5 is by signal receiving coil Ls3, series resonant capacitance Cs3, modulating and demodulating signal circuit structure
At.Circuit natural resonance frequency is equal to nth harmonic frequency, constitutes nth harmonic channel；Signal modulation circuit and primary side signal modulation
Circuit structure is identical, by modulated resistance Rm21, buffer resistance Rm22The modulation for realizing digital signal is formed with two-way switch；Signal
Demodulator circuit is similarly diode detection circuit and comparison circuit.
The present invention also proposes the control method of a kind of radio energy signal synchronous transfer and remained capacity time division multiplex system,
This method specifically includes four-stage:
Remained capacity startup stage.When remained capacity to be carried out, setting is when secondary side receives a certain serial data such as first
When " 10110 ", it is believed that primary side is wanted to carry out remained capacity, passes through digital signal controller (Digital signal
Controller, DSC) driving signal of two-way switch is generated, two-way switch turns on and off for indicating digital signal " 1 "
" 0 ".
Enabling signal transmission phase.The work of primary side signal circuit sends state, secondary side signal in signal in this stage
Transmission circuit works in signal reception state；Turning on and off for primary side two-way switch is controlled by DSC, so that signal primary side
The discontinuous mode of electric current occurrence law, therefore secondary side signal coil can pick up the different voltage of low and high level, signal
Resonant capacitor voltage there is the voltage envelope containing signal characteristic, can extract opening for primary side transmission using detecting circuit
Dynamic signal.
The remained capacity stage.After signal pair side receives the serial data set, secondary side multiplex switch S3It can first be closed
It disconnects again, load characteristic is judged according to load voltage, that is, electric current phase difference at this time, when further according to multiplex switch different conditions
Load current size column write load impedance equation group, can judge load value by calculating.
Identification information transmission phase.The work of primary side signal circuit is in signal reception state, secondary side signal in this stage
Transmission circuit works in signal transmission phase, multiplex switch S3Closure；The principle and enabling signal transmission phase one of signal transmission
It causes, is all to be recognized after the property of load using the on-off of two-way switch in DSC control modulation circuit according to certain coding shape
Load is transferred in the form of serial data system primary side, can restored in the signal demodulating circuit of system primary side by formula
This signal, using the property for being just able to know that load after decoding.
Above-mentioned control method is further described below with reference to physical circuit topology, specifically includes step:
When a. working normally, multiplex switch S3Closure, secondary side electric energy receives circuit 4 and secondary side signal transmission circuit 5 at this time
Parallel connection, former secondary side signal transmission circuit will not influence electric energy normal transmission.
B. the signal modulation circuit when system needs to carry out remained capacity, first in control primary side signal circuit 3
A specific enabling signal (such as " 11010 ") is sent, after demodulating enabling signal in secondary side signal transmission circuit 5, starts to carry out
Remained capacity.
C. remained capacity stage 1: detection load terminal voltage and electric current first, and be sent into DSC, by comparing voltage and current
Between phase difference may determine that the property of load, if phase difference is zero, for resistive load；If phase difference is greater than zero, for
Inductive load；If phase difference is less than zero, for capacitive load.Since the natural resonance frequency that secondary side electric energy receives circuit 4 is base
Wave frequency rate, it is possible to which column write out fundamental wave load equation:
I in formulap1onIndicate electric energy transmitting coil electric current when multiplex switch closure, Is1onIt indicates when multiplex switch is closed
Load current, M1Indicate the mutual inductance between electric energy transmitting coil and secondary side receiving coil, R, L be respectively load to be asked resistance value and
Inductance value.
D. remained capacity stage 2: multiplex switch S is disconnected3, secondary side electric energy receives circuit 4 and 5 shape of secondary side signal transmission circuit
At cascaded structure, the electric current in load is primary side electric energy transmitting circuit 2 and 3 collective effect of primary side signal circuit and produces at this time
It is raw.According to superposition theorem it is found that load current Is1offIt can be considered that primary side electric energy transmitting circuit 2 and primary side signal circuit 3 are single
Solely the sum of the electric current that effect generates carries out Fourier space decomposition to load current, obtains its fundametal compoment Is1off1, so that it may
Column in step c are copied to write fundamental wave load equation:
I in formulap1offIndicate electric energy transmitting coil electric current when multiplex switch disconnects, ReIt is the resistance in parallel of signal modulation resistance
Value, Re=Rm21||Rm22, X indicates the equivalent resistance of fundamental wave of secondary side signal transmission circuit 5 when 2 independent role of primary side electric energy transmitting circuit
It is anti-,
E. simultaneous equations (1) and (2) can calculate the resistance value and reactance value of load.
F. multiplex switch S is closed after the completion of remained capacity3, it is transmitted to using certain coding form through load information and is
System primary side, secondary side signal transmission circuit 5 is used to send signal at this time, and primary side signal circuit 3 is used to receive signal.
The following are a specific embodiments of the invention:
As shown in Figure 1,1 working frequency of high-frequency inverter circuit is 20kHz, DC power supply E=24V；Primary side electric energy transmitting electricity
2 natural resonance frequency of road is equal to working frequency, and parameter is set as La1=40.33 μ H, Cp11=1.57 μ F, Cp12=0.47 μ F,
Lp1=175 μ H；The parameter that secondary side electric energy receives circuit 4 is set as Ls1=124.74 μ H, Cs1=507nF；Primary side signal transmission electricity
The resonance frequency on road 3 is third harmonic frequencies, and 60kHz, parameter is set as La3=4 μ H, Cp31=1.759 μ F, Cp32=0.1 μ
F, Lp3=74 μ H, Rm12=1 Ω, Rm12=1000 Ω；The parameter of secondary side signal transmission circuit 5 is set as Ls3=10 μ H, Cs3=
703.6nF, Rm21=1 Ω, Rm22=1000 Ω.
In system worked well, inverter output voltage Ui, electric energy transmitting coil electric current ipAnd load voltage UoWave
Shape is as shown in Figure 2.It can be seen that ipAnd UiBetween phase just differ 90 °, illustrate that circuit frequency-selecting effect is good, inverter output electricity
Pressure expression formula be
In formula, E is DC voltage, ω0It is inverter working frequency, t is the time.
Known by above formula, i.e. there are fundamental waves there is higher hamonic wave abundant again in square-wave voltage, it is therefore desirable to which design is reasonable
Frequency selection circuit separates the fundamental wave and harmonic wave in square-wave voltage, and electric energy emits and receive circuit, former secondary side signal transmission circuit
Parameter meets respectively:
Triple-frequency harmonics is chosen in the present invention to analyze system.
Divided by parameter designing from inversion output when being successfully separated out fundametal compoment and third-harmonic component in wave voltage
Electric energy and signal Yong Lai not transmitted.The realization of two kinds of functions of electric power signal synchronous transfer and remained capacity is by multiplex switch S3
Open and be closed and complete, in normal work, multiplex switch closure, system waveform is as shown in Figure 2；When being loaded
When identification, a string of formulation signals are sent from primary side to secondary side first, such as " 11010 ", digital signal " 1 " indicates modulation switch Sp1It closes
It closes, " 0 " indicates modulation switch Sp1It disconnects, therefore as opening for modulation switch can be in the humorous of secondary side signal transmission circuit with shutdown
Shake capacitor Cs1Upper generation voltage envelope is believed using the number that diode detection circuit and comparison circuit can restore transmission
Number, as shown in Fig. 3 (b).Fig. 3 (a) indicates inverter output voltage waveform, electric energy transmitting coil current waveform and load voltage wave
Shape therefrom it can also be seen that, in signal transmitting, is transmitted without any influence to electric energy.
When carrying out remained capacity, multiplex switch of being first failure to actuate detects load terminal voltage and electric current, is re-fed into DSC and carries out
Processing analysis, first judges load characteristic according to the phase difference between voltage and current, then arrange and write load equation；Multiplexing is then turned off to open
It closes, it is same to detect load terminal voltage electric current, since i.e. there are fundametal compoments there is third-harmonic component again in secondary circuit at this time,
It decomposes to obtain its fundametal compoment virtual value so needing to carry out load current Fourier space, then same column write load equation.
As shown in figure 4, emulation duration 0.02s, multiplex switch is disconnected in 0.01s, when indicating that multiplex switch disconnects front and back in Fig. 4 (a)
Inverter output voltage and electric energy transmitting coil electric current, it can be seen that switching multiplex switch electric energy transmitting circuit will not be generated
It influences；Fig. 4 (b) indicates the load voltage (solid line) and load current (dotted line) of multiplex switch switching front and back, it can be seen that multiplexing
Switching can generate load voltage electric current and significantly affect；Fig. 4 (c) indicates load voltage when multiplex switch switching front and back
FFT decomposition diagram, multiplex switch disconnect third-harmonic component in back loading voltage and obviously increase, therefore according to formula (1) and (2)
Actual loading resistance value and reactance value can be solved.
Multiplex switch S is re-closed after completing remained capacity3, electric energy receive circuit 4 again and secondary side signal transmission circuit 5
Form parallel-connection structure.Secondary side signal transmission circuit 5 is used as signal sending end at this time, and primary side signal circuit 3 is used as signal
Receiving end, the principle of signal reverse transfer and positive transmission are completely the same, i.e. control modulation switch Ss1Open and shutdown will count
Word signal modulation is transmitted to primary side into system, then by signal coil, detects primary side resonant capacitance Cp32On voltage envelope,
It is re-fed into the reduction that can be realized as signal in demodulator circuit.Inverter output voltage, electricity when Fig. 4 (a) is signal reverse transfer
Energy transmitting coil electric current and load voltage waveform, it can be seen that the transmission of electric energy also without any shadow when signal reverse transfer
It rings；When Fig. 4 (b) is signal reverse transfer baseband signal (on) and demodulated signal (under), there are one in transmission process for signal
Fixed delay caused by this is the time constant of passive device present in system (inductance, capacitor), but carrys out signal transmission
It says, influences smaller.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (5)
1. a kind of radio energy signal synchronous transfer and remained capacity time division multiplex system characterized by comprising high-frequency inversion
Circuit (1), primary side electric energy transmitting circuit (2), primary side signal circuit (3), secondary side electric energy receive circuit (4) and secondary side signal
Transmission circuit (5)；Direct current power source voltage is converted into high-frequency ac square wave by high-frequency inverter circuit (1)；Primary side electric energy transmitting circuit
(2) and primary side signal circuit (3) is connected in parallel on the output end of high-frequency inverter circuit (1), and primary side electric energy transmitting circuit (2) is from height
The fundametal compoment for being used for transmission electric energy is extracted in frequency ac square wave, and fundametal compoment is transferred to by secondary side electricity by electromagnetic coupling
It can receive circuit (4), the output end that secondary side electric energy receives circuit (4) connects load；Primary side signal circuit (3) is handed over from high frequency
The nth harmonic component for being used for transmission signal is extracted in stream square wave, and gives nth harmonic components to secondary side by electromagnetic coupling
Signal circuit (5)；Secondary side electric energy receives circuit (4) and secondary side signal transmission circuit (5) through multiplex switch S3It is connected to one
It rises, as multiplex switch S3When closure, secondary side electric energy receives circuit (4) and secondary side signal transmission circuit (5) is in parallel, realizes electricity at this time
It can signal synchronous transfer function；S3When opening, electric energy receives circuit (4) and secondary side signal transmission circuit (5) series connection, realizes at this time
Remained capacity function；
It is described realize electric power signal synchronous transfer include from primary side to it is secondary while positive transmission and from it is secondary while to primary side reversed biography
It is defeated；When carrying out the transmission of electric power signal forward direction, primary side signal circuit (3) receives primary side digital signal, and primary side is digital
Secondary side signal transmission circuit (5) are transferred in signal modulation to nth harmonic component；It is secondary when carrying out electric power signal reverse transfer
Side signal circuit (5) receives secondary sideband digital signal, and secondary sideband digital signal is modulated on nth harmonic component and is transferred to original
Side signal circuit (3).
2. a kind of radio energy signal synchronous transfer according to claim 1 and remained capacity time division multiplex system, special
Sign is that the energy transmitting circuit (2) includes resonant inductance La1, resonant capacitance Cp11And Cp12And energy transmitting coil Lp1,
La1、Cp11、Cp12、Lp1Form LCCL fundamental wave frequency selection circuit；The primary side signal circuit (3) includes resonant inductance La3, resonance
Capacitor Cp31、Cp32, transmitting coil Lp3, two-way switch pipe Sp1, modulated resistance Rm11, buffer resistance Rmi2, signal reversely demodulate electricity
Road；Control signaling switch pipe Sp1With modulated resistance Rm11After series connection again with Rm12Parallel connection forms signal forward direction modulation circuit；La3、
Lp3、Cp31、Cp32Form nth harmonic frequency selection circuit, wherein La3、Lp3、Cp32Series connection, Cp31One end connects La3And Lp3Tie point,
The other end and Cp32Free end be connected；It is parallel to high-frequency inversion again after nth harmonic frequency selection circuit series signals forward direction modulation circuit
The output end of circuit (1)；The reversed demodulator circuit of signal is connected in parallel on Cp32Both ends, pass through detection Cp32The voltage at both ends passes secondary side
The signal for being presented to primary side, which demodulates, to be come；It includes: energy receiving coil L that secondary side electric energy, which receives circuit (4),s1, resonant capacitance Cs1, it is negative
Carry resistance RLWith multiplex switch S3；Ls1One end passes through Cs1With RLConnection, the other end pass through S3With RLConnection；Secondary side signal transmission electricity
Road (5) includes: receiving coil Ls3, series resonant capacitance Cs3, modulated resistance Rm21, buffer resistance Rm22, control signaling switch pipe
Ss1, signal forward demodulator circuit；Ss1With Rm21After series connection again with Rm22Parallel connection forms signal back-modulation circuit；Signal is reversely adjusted
Circuit on one side processed connects S3With RLTie point, the other end passes sequentially through Cs3、Ls3With Ls1Connection；Signal forward demodulator circuit in parallel
In Cs3Both ends, pass through detection Cs3Primary side is transmitted to the signal on secondary side and demodulates by the voltage at both ends.
3. a kind of radio energy signal synchronous transfer according to claim 2 and remained capacity time division multiplex system, special
Sign is, the control signaling switch pipe Sp1And Ss1Structure is identical, is made of a metal-oxide-semiconductor and its parasitic body diode
Alternating current path.
4. a kind of radio energy signal synchronous transfer according to claim 2 and remained capacity time division multiplex system, special
Sign is that the high-frequency inverter circuit (1) is the full-bridge type inversion that four Metal-Oxide Semiconductor field effect transistors are constituted
Circuit.
5. a kind of radio energy signal synchronous transfer as described in Claims 1-4 any one and remained capacity are time-multiplexed
The control method of system, which is characterized in that comprising steps of
When a. working normally, multiplex switch S3Closure, secondary side electric energy receives circuit (4) and secondary side signal transmission circuit (5) simultaneously at this time
Connection, primary side signal circuit (3) will not influence electric energy normal transmission；
B. when system needs to carry out remained capacity, the signal forward direction first in control primary side signal circuit (3) modulates electricity
Road sends a specific enabling signal, after demodulating enabling signal in secondary side signal transmission circuit (5), starts to carry out load knowledge
Not；
C. remained capacity stage one: detection secondary circuit load terminal voltage and size of current and phase relation first utilize number
Signal processor judges load characteristic: if phase difference is zero, for resistive load；If phase difference is greater than zero, for inductive load；
If phase difference is less than zero, for capacitive load；The natural resonance frequency for receiving circuit (4) based on secondary side electric energy is fundamental frequency,
Build fundamental wave load equation:
I in formulap1onIndicate multiplex switch S3The electric energy transmitting coil electric current of primary side electric energy transmitting circuit (2) when closure ,/s1onIt indicates
Multiplex switch S3Load current when closure, M1The electric energy transmitting coil and secondary side electric energy for indicating primary side electric energy transmitting circuit (2) connect
The mutual inductance between the electric energy receiving coil in circuit (4) is received, R, L are the resistance value and inductance value of load to be asked respectively；
D. remained capacity stage two: multiplex switch S is disconnected3, secondary side electric energy reception circuit (4) and secondary side signal transmission circuit (5) shape
At cascaded structure, the electric current in load is primary side electric energy transmitting circuit (2) and primary side signal circuit (3) collective effect at this time
And it generates；Fundamental wave load equation is built again:
In formula ,/p1offIndicate multiplex switch S3The electric energy transmitting coil electric current of primary side electric energy transmitting circuit (2) when disconnection, ReIt is
The resistance value in parallel of signal modulation resistance, Re=Rm21||Rm22, X indicate primary side electric energy transmitting circuit (2) independent role when pair side believe
The fundamental wave equivalent impedance of number transmission circuit (5),
E. simultaneous equations (1) and (2) can calculate the resistance value and reactance value of load；
F. multiplex switch S is closed after the completion of remained capacity3, control the signal back-modulation circuit in secondary side signal transmission circuit (5)
It sends signal and is transmitted to system primary side through load information, secondary side signal transmission circuit (5) is used to send signal, primary side signal at this time
Transmission circuit (3) is used to receive signal.
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