CN115102300A - Parallel injection type wireless information and energy simultaneous transmission system and method - Google Patents
Parallel injection type wireless information and energy simultaneous transmission system and method Download PDFInfo
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- CN115102300A CN115102300A CN202210705516.0A CN202210705516A CN115102300A CN 115102300 A CN115102300 A CN 115102300A CN 202210705516 A CN202210705516 A CN 202210705516A CN 115102300 A CN115102300 A CN 115102300A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 80
- 238000002347 injection Methods 0.000 title claims abstract description 40
- 239000007924 injection Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims description 107
- 238000000605 extraction Methods 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 6
- 230000001427 coherent effect Effects 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims 1
- 238000002955 isolation Methods 0.000 abstract 1
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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
- 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
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/3353—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
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Abstract
The invention relates to the field of wireless power transmission, and discloses a parallel injection type wireless signal energy simultaneous transmission system and a method. The data carrier is directly injected into the electric energy resonant cavity in a high-frequency current mode by adopting a parallel injection type information modulation mode, and the isolation between information and a power loop is realized through a wave trap, so that the crosstalk between the power loop and the information loop is reduced, the data transmission gain is improved, the problem of power fluctuation caused by information transmission in a wireless information and energy simultaneous transmission system is avoided, and the half-duplex transmission of the information can be realized.
Description
Technical Field
The invention relates to the field of wireless power transmission, in particular to a parallel injection type wireless information and power simultaneous transmission system and a method.
Background
In some practical applications, real-time communication needs to be carried out on the primary side and the secondary side of a charging system, common methods comprise technologies such as Bluetooth, ZigBee, Wi-Fi and radio frequency, but the technologies need to be paired at a transmitting end and a receiving end, and transmission delay is long. The wireless power and information synchronous transmission technology adopting a shared channel is a communication means with a good effect at present, and the main method comprises the steps of modulating an energy waveform and modulating a data carrier to transmit information, but the modulation of a power carrier can generate power fluctuation, and the data rate is also limited by a low-frequency power carrier, so that the method of transmitting data by modulating a signal carrier gradually becomes one of more advanced methods in the field of wireless power and information simultaneous transmission.
Disclosure of Invention
The invention provides a parallel injection type wireless information and energy simultaneous transmission system for solving the problems in the prior art, which realizes synchronous transmission of wireless energy and an information sharing channel and keeps better power stability and higher information transmission rate.
The purpose of the invention can be realized by the following technical scheme:
a parallel injection type wireless information and energy simultaneous transmission system comprises a direct current source, a full-bridge inversion unit, an electric energy transmitting unit, a primary side wave trap unit, an electric energy receiving unit, a secondary side wave trap unit, a full-bridge rectification unit, a power load, an information injection unit, an information extraction unit and a demodulation unit,
the input end of the full-bridge inversion unit is connected with a direct current source, and the output end of the full-bridge inversion unit is connected with the electric energy transmitting unit and the primary side wave trap unit which are connected in series;
the electric energy transmitting unit comprises a primary side transmitting coil L 1 And primary side compensation capacitor C 1 ；
The information injection unit is connected in parallel to the primary side transmitting coil L 1 Both sides of (a);
the input end of the full-bridge rectifying unit is connected with the electric energy receiving unit and the secondary side wave trap unit which are connected in series, and the output end of the full-bridge rectifying unit is connected with the power load R L Connecting;
the electric energy receiving unit comprises a secondary receiving coil L 2 And secondary side compensation capacitor C 2 ；
The information extraction unit is connected in parallel with the secondary side receiving coil L 2 On both sides of the base.
Filter capacitor C d And a power load R L Are connected in parallel;
in the system, electric energy and information are transmitted through a shared channel, an information transmission unit is connected to two ends of an electric energy transmission coil in parallel, the topology of a main circuit for electric energy transmission is S-P topology, and circuits for information injection and information extraction adopt LCC resonance topologies which are symmetrical and the same.
Further, the air conditioner is provided with a fan,
the electric energy transmitting unit comprises a primary side transmitting coil L 1 And primary side compensation capacitor C 1 ；
The primary side trap cell includes an inductance L z1 An inductor L z2 Inductor L z3 Capacitor C z1 Capacitor C z2 Capacitor C z3 And a capacitor C pz ；
The electric energy receiving unit comprises a secondary receiving coil L 2 And secondary side compensation capacitor C 2 ；
The secondary side trap cell comprises an inductance L z4 Inductor L z5 Inductor L z6 Capacitor C z4 Capacitor C z5 Capacitor C z6 And a capacitor C sz ；
The information injection unit comprises a carrier signal source V c Inductance L p1 Capacitor C p1 Capacitor C p2 State change-over switch S 1 ；
The information extraction unit comprises an extraction resistor R s Inductance L p2 Capacitor C s1 Capacitor C s2 And a state change-over switch S 2 ；
The demodulation unit comprises a band-pass filter module and a non-coherent demodulation module.
Further, the inductance L z1 Capacitor C z1 Parallel connected to form wave trap T 1 Inductance L z2 Capacitor C z2 Parallel connected to form wave trap T 2 Inductance L z3 Capacitor C z3 Parallel connected to form a wave trap T 3 Inductance L z4 Capacitor C z4 Parallel connected to form wave trap T 4 Inductance L z5 Capacitor C z5 Parallel connected to form wave trap T 5 Inductance L z6 Capacitor C z6 Parallel connected to form wave trap T 6 ；
The wave trap T 1 Wave trap T 2 Wave trap T 3 Primary side transmitting coil L 1 Primary side compensation capacitor C 1 Internal resistance R of the transmitting coil 1 And a primary side trap compensation capacitor C pz Are connected in series;
the wave trap T 4 Wave trap T 5 Wave trap T 6 Primary side transmitting coil L 1 And a secondary side trap compensation capacitor C sz Internal resistance R of the receiving coil 2 The compensation capacitor C is connected in series and then connected with the secondary side 2 Are connected in parallel.
Further, in the information injection unit, a carrier signal source V c One end is connected with an inductor L p1 The other end is connected with a capacitor C p1 Inductance L p1 Another terminal of (1) and a capacitor C p1 Is connected to the other end of the inductor L p1 And the other end of the switch S is also connected with a state switch 1 Connected, state change-over switch S 1 Another end of (1) and a primary side transmitting coil L 1 Connected to a capacitor C p2 Another end of (1) and a primary side transmitting coil L 1 And the other end of the two are connected.
Further, in the information extraction unit, an extraction resistance R s One end is connected with L s1 The other end is connected with a capacitor C s1 Inductance L s1 Another terminal of (2) and a capacitor C s1 Is connected to the other end of the inductor L p2 And the other end of the switch S is also connected with a state switch 2 Connected, state change-over switch S 2 And the other end and the secondary side receiving coil L of 2 Connected to a capacitor C s2 And the other end and the secondary side receiving coil L of 2 And the other end of the two are connected.
Further, the switching frequency of the full-bridge inverter unit is the power transmission resonant frequency f 0 (ii) a The resonance frequency of the LCC topology is the carrier frequency f of the information transmission loop 1 、f 2 、f 3 And satisfy
In the formula
ω 1 ＜ω 2 ＜ω 3 。
Furthermore, the parameters of the primary side wave trap and the secondary side wave trap are consistent, and the center frequency of the primary side wave trap and the center frequency of the secondary side wave trap are consistent with the carrier frequency f of the information transmission loop 1 、f 2 、f 3 Coincidence, trap parameters are satisfied
The primary side trap compensation capacitor C pz And a secondary side trap compensation capacitor C sz Respectively used for compensating the influence of the impedance of the primary and secondary wave traps on the resonance point of electric energy transmission, and compensating capacitor C of the wave trap pz And C sz Is satisfied with
The invention also provides a parallel injection type wireless information and energy simultaneous transmission method, which comprises the following steps:
the DC power supply outputs equivalent AC voltage V through a full-bridge inverter 1 ，V 1 Output to a load R through a main circuit consisting of S-P topology L And two ends are used for realizing electric energy transmission.
Modulating the frequency of a carrier signal source, V, according to a binary data signal c Outputting sine AC high-frequency voltage signal, injecting high-frequency carrier current into the transmitting coil via the information injection unit, forming high-frequency carrier induced voltage at two ends of the transmitting coil and the receiving coil, and extracting resistance R s On detecting a high-frequency voltage signal u of the corresponding frequency s A high-frequency voltage signal u s Sending the signal into a band-pass filter with corresponding band-pass center frequency and carrier frequency, passing through an incoherent demodulation module, and calculating according to u s The amplitude difference of the signals is used for detecting the corresponding carrier frequency, and then data information is demodulated.
In the case of forward transmission of information, the data selector switch S 2 Kept closed, and data selection switch S when binary data signal is' 00 1 Disconnecting;
when the binary data signal is "01", the data select switch S 1 Closed, carrier signal source u c Has a frequency of f 1 ；
When the binary data signal is "10",data selection switch S 1 Closed, carrier signal source u c Has a frequency of f 2 ；
When the binary data signal is "10", the data selection switch S 1 Closed, carrier signal source u c Has a frequency of f 3 ；
Data selection switch S in the case of information reverse transmission 1 And keeping closed, and the setting of the carrier signal source is consistent with that of the information forward transmission.
The invention has the beneficial effects that:
the parallel injection type wireless information and energy simultaneous transmission system and method provided by the invention can realize synchronous transmission of wireless electric energy and an information sharing channel, and keep better power stability and higher information transmission rate.
Drawings
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is a structural diagram of a parallel injection type wireless information and energy simultaneous transmission system according to an embodiment of the present application;
FIG. 2 is an equivalent schematic diagram of the power transmission circuit of FIG. 1;
fig. 3 is an equivalent schematic diagram of the information transmission circuit in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-3, the parallel injection type wireless signal energy simultaneous transmission system includes a dc source, a full bridge inverter unit, an electric energy transmitting unit, a primary side wave trap unit, an electric energy receiving unit, a secondary side wave trap unit, a full bridge rectifier unit, a power load, an information injection unit, an information extraction unit, and a demodulation unit.
The full-bridge inverter unit comprises a switch tube Q 1 、Q 2 、Q 3 、Q 4 。
The electric energy transmitting unit comprises a primary side transmitting coil L 1 And primary side compensation capacitor C 1 ；
The primary side trap cell includes an inductance L z1 Inductor L z2 Inductor L z3 Capacitor C z1 Capacitor C z2 Capacitor C z3 And a capacitor C pz ；
The electric energy receiving unit comprises a secondary receiving coil L 2 And secondary side compensation capacitor C 2 ；
The secondary side trap cell comprises an inductance L z4 An inductor L z5 Inductor L z6 Capacitor C z4 Capacitor C z5 Capacitor C z6 And a capacitor C sz ；
The information injection unit comprises a carrier signal source V c Inductance L p1 Capacitor C p1 Capacitor C p2 State change-over switch S 1 ；
The information extraction unit comprises an extraction resistor R s Inductance L p2 Capacitor C s1 Capacitor C s2 And a state change-over switch S 2 ；
The demodulation unit comprises a band-pass filter module and a non-coherent demodulation module;
in the system, electric energy and information are transmitted through a shared channel, an information transmission unit is connected to two ends of an electric energy transmission coil in parallel, the topology of a main circuit for electric energy transmission is S-P topology, and circuits for information injection and information extraction adopt LCC resonance topologies which are symmetrical and the same.
The inductance L z1 Capacitor C z1 Parallel connected to form a wave trap T 1 Inductance L z2 Capacitor C z2 Parallel connected to form a wave trap T 2 Inductance L z3 Capacitor C z3 Parallel connected to form wave trap T 3 Inductance L z4 Capacitor C z4 Parallel connected to form wave trap T 4 Inductance L z5 Capacitor C z5 Parallel connected to form wave trap T 5 Inductance L z6 Capacitor C z6 Parallel connected to form wave trap T 6 ；
The wave trap T 1 Wave trap T 2 Wave trap T 3 Primary side transmitting coil L 1 Primary side compensation capacitor C 1 Internal resistance R1 of transmitting coil primary side wave trap compensating capacitor C pz Are connected in series;
the wave trap T 4 Wave trap T 5 Wave trap T 6 Primary side transmitting coil L 1 And a secondary side trap compensation capacitor C sz The receiving coil internal resistance R2 is connected in series and then is connected with the secondary side compensation capacitor C 2 Are connected in parallel;
the input end of the full-bridge inversion unit is connected with a direct current source, and the output end of the full-bridge inversion unit is connected with the electric energy emission unit;
the input end of the full-bridge rectifying unit is connected with the electric energy receiving unit, and the output end of the full-bridge rectifying unit is connected with the load R L Connecting;
the filter capacitor C d And a load R L Are connected in parallel;
in the information injection unit, a carrier signal source V c One end is connected with an inductor L p1 The other end is connected with a capacitor C p1 Inductance L p1 Another terminal of (1) and a capacitor C p1 Is connected to the other end of the inductor L p1 And the other end of the switch S is also connected with a state switch 1 Connected, state change-over switch S 1 Another end of (1) and a primary side transmitting coil L 1 Connected to a capacitor C p2 Another end of (1) and a primary side transmitting coil L 1 The other ends are connected; in the information extraction unit, an extraction resistor R s One end is connected with L s1 The other end is connected with a capacitor C s1 Inductance L s1 Another terminal of (1) and a capacitor C s1 Is connected to the other end of the inductor L p2 And the other end of the switch S is also connected with a state switch 2 Connected, state change-over switch S 2 And the other end and the secondary side receiving coil L of 2 Connected to a capacitor C s2 And the other end of the secondary side receiving coil L 2 And the other end of the two are connected.
The switching frequency of the full-bridge inverter unit is the electric energy transmission resonant frequency f 0 (ii) a LCC topologyThe resonance frequency of (a) is the carrier frequency f of the information transmission circuit 1 、f 2 、f 3 And satisfy
In the formula
ω 1 ＜ω 2 ＜ω 3
The primary side wave trap and the secondary side wave trap have the same parameters, and the center frequency of the primary side wave trap and the secondary side wave trap are the carrier frequency f of the information transmission loop 1 、f 2 、f 3 The impedance of the wave trap is larger under the carrier frequency, so that the high-frequency carrier signal can be prevented from flowing in the electric energy loop to cause signal attenuation, the effect of reducing the crosstalk of data transmission on power transmission can be achieved, and the parameters of the wave trap meet the requirements
The primary side trap compensation capacitor C pz And a secondary side trap compensation capacitor C sz Are respectively used for compensating the primary and secondary side notchesThe influence of the wave-filter impedance on the resonance point of the electric energy transmission, the wave-trap compensating capacitor C pz And C sz Is satisfied with
In the system, electric energy and information are transmitted through a shared channel, an information transmission unit is connected to two ends of an electric energy transmission coil in parallel, the topology of a main circuit for electric energy transmission is an S-P topology, and circuits for information injection and information extraction adopt LCC resonance topologies which are the same in symmetry.
The parallel injection type wireless information and energy simultaneous transmission method of the system comprises the following steps: the DC power supply outputs equivalent AC voltage V through a full-bridge inverter 1 ，V 1 Output to a load R through a main circuit consisting of S-P topology L Two ends for realizing electric energy transmission; modulating the frequency of a carrier signal source, V, according to a binary data signal c Outputting sine AC high-frequency voltage signal, injecting high-frequency carrier current into the transmitting coil via the information injection unit to form high-frequency carrier induced voltage at two ends of the transmitting coil and the receiving coil, and extracting the resistor R s Can detect a high-frequency voltage signal u of a corresponding frequency s Carrier signal source with different frequencies is extracting resistance R s The amplitude of the generated voltage is different, and a high-frequency voltage signal u is generated s Sending the signal into a band-pass filter with a band-pass center frequency corresponding to the carrier frequency, and then passing the signal through an incoherent demodulation module s The amplitude difference of the signals is used for detecting the corresponding carrier frequency, and then data information is demodulated.
Data selection switch S under the condition of forward information transmission 2 Kept closed, the data select switch S being on a binary data signal of "00 1 Disconnecting;
when the binary data signal is "01", the data select switch S 1 Closed, carrier signal source u c Has a frequency of f 1 ；
When the binary data signal is "10", the data selection switch S 1 Closed, carrier signal source u c Has a frequency of f 2 ；
When the binary data signal is "10", the data selection switch S 1 Closed, carrier signal source u c Has a frequency of f 3 ；
Data selection switch S in the case of information reverse transmission 1 And keeping closed, and the setting of the carrier signal source is consistent with that of the information forward transmission.
FIG. 2 is an equivalent circuit of the power transmission circuit of the system of FIG. 1, and the topology of the main circuit for power transmission is S-P topology, V 1 The information injection unit can be simplified into an equivalent impedance Z for the output equivalent voltage source of the direct current source and the full-bridge inverter dp The information extraction unit can be simplified to an equivalent impedance Z ds ，C′ 1 Compensating the capacitance C for the primary side 1 And a primary side trap compensation capacitor C pz Due to the equivalent capacitance at the power transfer frequency omega 0 Lower, Z dp And Z ds The high impedance state is presented, so when analyzing the electric energy transmission, the influence of the data transmission path can be ignored, and the data transmission path is equivalent to an open circuit.
FIG. 3 is an equivalent circuit of the information transmission circuit of the system of FIG. 1, a high frequency carrier signal source V c Adopting DDS module modulation generation with AD9833 chip as core, obtaining actual resonance frequency of information transmission loop through Matlab programming calculation according to equivalent circuit in figure 3, and setting the actual resonance frequency as high-frequency carrier signal source V c Of (c) is detected. And voltage signals at two ends of the extracted resistor pass through the demodulation unit to obtain a restored binary data signal.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are only preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for the purpose of limiting the scope of the present invention, and on the contrary, any modifications or modifications based on the spirit of the present invention should fall within the scope of the present invention.
Claims (10)
1. A parallel injection type wireless information and energy simultaneous transmission system is characterized by comprising a direct current source, a full-bridge inversion unit, an electric energy transmitting unit, a primary side wave trap unit, an electric energy receiving unit, a secondary side wave trap unit, a full-bridge rectification unit, a power load, an information injection unit, an information extraction unit and a demodulation unit,
the input end of the full-bridge inversion unit is connected with a direct current source, and the output end of the full-bridge inversion unit is connected with the electric energy transmitting unit and the primary side wave trap unit which are connected in series;
the electric energy transmitting unit comprises a primary side transmitting coil L 1 And primary side compensation capacitor C 1 ；
The information injection unit is connected in parallel to the primary side transmitting coil L 1 Both sides of (a);
the input end of the full-bridge rectifying unit is connected with the electric energy receiving unit and the secondary side wave trap unit which are connected in series, and the output end of the full-bridge rectifying unit is connected with the power load R L Connecting;
the electric energy receiving unit comprises a secondary receiving coil L 2 And secondary side compensation capacitor C 2 ；
The information extraction unit is connected in parallel with the secondary side receiving coil L 2 On both sides of the base.
Filter capacitor C d And a power load R L Are connected in parallel;
in the system, electric energy and information are transmitted through a shared channel, an information transmission unit is connected to two ends of an electric energy transmission coil in parallel, the topology of a main circuit for electric energy transmission is S-P topology, and circuits for information injection and information extraction adopt LCC resonance topologies which are symmetrical and the same.
2. The parallel injection wireless communication and energy simultaneous transmission system according to claim 1,
the electric energy transmitting unit comprises a primary side transmitting coil L 1 And primary side compensation capacitor C 1 ；
The primary side trap cell includes an inductance L z1 An inductor L z2 Inductor L z3 Capacitor C z1 Capacitor C z2 Capacitor C z3 And a capacitor C pz ；
The electric energy receiving unit comprises a secondary receiving coil L 2 And secondary side compensation capacitor C 2 ；
The secondary side trap cell comprises an inductance L z4 An inductor L z5 Inductor L z6 Capacitor C z4 Capacitor C z5 Capacitor C z6 And a capacitor C sz ；
The information injection unit comprises a carrier signal source V c Inductance L p1 Capacitor C p1 Capacitor C p2 State change-over switch S 1 ；
The information extraction unit comprises an extraction resistor R s Inductance L p2 Capacitor C s1 Capacitor C s2 And a state change-over switch S 2 ；
The demodulation unit comprises a band-pass filter module and a non-coherent demodulation module.
3. The parallel injection wireless simultaneous signal and energy transmission system according to claim 2, wherein the inductance L is z1 Capacitor C z1 Parallel connected to form wave trap T 1 Inductance L z2 Capacitor C z2 Parallel connected to form wave trap T 2 Inductance L z3 Capacitor C z3 Parallel connected to form wave trap T 3 Inductance L z4 Capacitor C z4 Parallel connected to form a wave trap T 4 Inductance L z5 Capacitor C z5 Parallel connected to form a wave trap T 5 Inductance L z6 Capacitor C z6 Parallel connected to form wave trap T 6 ；
The wave trap T 1 Wave trap T 2 Wave trap T 3 Primary side transmitting coil L 1 Primary side compensation capacitor C 1 Internal resistance R of the transmitting coil 1 And a primary side trap compensation capacitor C pz Are connected in series;
the wave trap T 4 Wave trap T 5 Wave trap T 6 Primary side transmitting coil L 1 And a secondary side trap compensation capacitor C sz Internal resistance R of the receiving coil 2 The compensation capacitor C is connected in series and then connected with the secondary side 2 Are connected in parallel.
4. The parallel injection wireless signal-energy simultaneous transmission system according to claim 2, wherein the information injection unit comprises a carrier signal source V c One end is connected with an inductor L p1 The other end is connected with a capacitor C p1 Inductance L p1 Another terminal of (2) and a capacitor C p1 Is connected to the other end of the inductor L p1 And the other end of the switch S is also connected with a state switch 1 Connected, state change-over switch S 1 Another end of (1) and a primary side transmitting coil L 1 Connected to a capacitor C p2 Another end of (1) and a primary side transmitting coil L 1 And the other end of the two are connected.
5. The parallel injection wireless communication and energy simultaneous transmission system according to claim 2, wherein the information extraction unit extracts a resistor R s One end is connected with L s1 The other end is connected with a capacitor C s1 Inductance L s1 Another terminal of (2) and a capacitor C s1 Is connected to the other end of the inductor L p2 And the other end of the switch S is also connected with a state switch 2 Connected, state change-over switch S 2 And the other end of the secondary side receiving coil L 2 Connected to a capacitor C s2 And the other end and the secondary side receiving coil L of 2 And the other end of the two are connected.
6. The parallel injection wireless communication and energy simultaneous transmission system according to claim 1, wherein the full-bridge inverter unit switching frequency is a power transmission resonant frequency f 0 (ii) a The resonance frequency of the LCC topology is the carrier frequency f of the information transmission loop 1 、f 2 、f 3 And satisfy
In the formula
ω 1 ＜ω 2 ＜ω 3 。
7. The parallel injection wireless communication and energy transmission system according to claim 1, wherein the primary side trap and the secondary side trap are parametric in the same way, and have center frequencies corresponding to the carrier frequency f of the information transmission loop 1 、f 2 、f 3 Coincidence, trap parameters are satisfied
The primary side trap compensation capacitor C pz And secondary side trap compensation capacitor C sz Respectively used for compensating the influence of the impedance of the primary and secondary wave traps on the resonance point of electric energy transmission, and compensating capacitor C of the wave trap pz And C sz Is satisfied with
8. A parallel injection wireless simultaneous transmission method for any parallel injection wireless simultaneous transmission system of claims 1-7, the method comprising:
the DC power supply outputs equivalent AC voltage V through the full-bridge inverter 1 ，V 1 Output to a load R through a main circuit consisting of S-P topology L And two ends are used for realizing electric energy transmission.
9. The method of claim 8, wherein the method comprises:
modulating the frequency of a carrier signal source, V, according to a binary data signal c Outputting sine AC high-frequency voltage signal, injecting high-frequency carrier current into the transmitting coil via the information injection unit, forming high-frequency carrier induced voltage at two ends of the transmitting coil and the receiving coil, and extracting resistance R s On detecting a high-frequency voltage signal u of the corresponding frequency s A high-frequency voltage signal u s Sending the signal into a band-pass filter with corresponding band-pass center frequency and carrier frequency, passing through an incoherent demodulation module, and calculating according to u s The amplitude difference of the signals is used for detecting the corresponding carrier frequency, and then data information is demodulated.
10. The method of claim 9,
in the case of forward transmission of information, the data selector switch S 2 Kept closed, and data selection switch S when binary data signal is' 00 1 Disconnecting;
when the binary data signal is "01", the data selection switch S 1 Closed, carrier signal source u c Has a frequency of f 1 ；
When the binary data signal is "10", the data selection switch S 1 Closed, carrier signal source u c Has a frequency of f 2 ；
When the binary data signal is "10", the data selection switch S 1 Closed, carrier signal source u c Has a frequency of f 3 ；
Data selection switch S in the case of information reverse transmission 1 The closing is kept, and the setting of the carrier signal source is consistent with the information forward transmission condition.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210705516.0A CN115102300B (en) | 2022-06-21 | 2022-06-21 | Parallel injection type wireless information and energy simultaneous transmission system and method |
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| CN202210705516.0A CN115102300B (en) | 2022-06-21 | 2022-06-21 | Parallel injection type wireless information and energy simultaneous transmission system and method |
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| CN115102300A true CN115102300A (en) | 2022-09-23 |
| CN115102300B CN115102300B (en) | 2024-02-23 |
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