CN115459461A - Multi-relay wireless energy information parallel transmission system based on bipolar coil - Google Patents
Multi-relay wireless energy information parallel transmission system based on bipolar coil Download PDFInfo
- Publication number
- CN115459461A CN115459461A CN202211272037.0A CN202211272037A CN115459461A CN 115459461 A CN115459461 A CN 115459461A CN 202211272037 A CN202211272037 A CN 202211272037A CN 115459461 A CN115459461 A CN 115459461A
- Authority
- CN
- China
- Prior art keywords
- coil
- information
- energy
- compensation capacitor
- relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 103
- 239000003990 capacitor Substances 0.000 claims abstract description 93
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006880 cross-coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- 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
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
-
- 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
- H02J50/50—Circuit arrangements or systems for wireless supply or distribution of electric power using additional energy repeaters between transmitting devices and receiving devices
-
- 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
- H02M3/01—Resonant DC/DC converters
- H02M3/015—Resonant DC/DC converters with means for adaptation of resonance frequency, e.g. by modification of capacitance or inductance of resonance circuit
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/4807—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode having a high frequency intermediate AC stage
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/4815—Resonant converters
- H02M7/4818—Resonant converters with means for adaptation of resonance frequency, e.g. by modification of capacitance or inductance of resonance circuits
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
- H01F2038/143—Inductive couplings for signals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
- H01F2038/146—Inductive couplings in combination with capacitive coupling
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The invention relates to the technical field of wireless energy information parallel transmission, and particularly discloses a multi-relay wireless energy information parallel transmission system based on a bipolar coil. The system only adopts a group of coils (and corresponding compensation capacitors), does not need to design a wave resistance network, has small overall occupied space, simple structure and safe use, and can ensure the long-distance, high-speed and stable transmission of energy and information under the condition of multiple relay coils.
Description
Technical Field
The invention relates to the technical field of wireless energy information parallel transmission, in particular to a multi-relay wireless energy information parallel transmission system based on a bipolar coil.
Background
In order to monitor the operation condition of an electric power system in real time all day long, a large number of online health monitoring devices are widely deployed in a high-voltage electric power network and become a foundation stone for the construction of a modern smart power grid. The ideal online health monitoring equipment can continuously operate all weather without manual maintenance, so that a stable power supply and a reliable data transmission mode become urgent requirements for the development of an online monitoring system. At present, the combination of a current transformer and a wireless electric energy transmission system becomes a feasible option, magnetic energy is collected at a high-voltage side, and then electric energy transmission of several meters is realized through a multi-relay coil wireless electric energy transmission system to supply power for online health monitoring equipment at a low-voltage side. Meanwhile, in order to realize real-time output power adjustment and detection information feedback, the construction of high data rate communication between a transmitting end and a receiving end of the system is very important for a wireless power transmission system.
In the existing scheme, independent information transmission channels and energy transmission channels are adopted, as shown in a scheme 'multi-relay wireless energy and data cooperative transmission system' disclosed by application number 202110730299.6, but the scheme adopts more coils, so that the system cost and volume are increased, particularly the volume and weight of online health monitoring equipment are increased, and the loss is increased.
At present, the existing scheme only uses one transmission channel to realize the parallel transmission of information and energy, as shown in the scheme of full-duplex WPT energy signal parallel transmission system based on two-sided LCC disclosed in application No. 202010895860.1, but the scheme does not consider a relay coil, and adopts more wave-blocking networks, so that the resonance characteristic of the system is more complex, and the instability of the system is increased.
Disclosure of Invention
The invention provides a multi-relay wireless energy information parallel transmission system based on a bipolar coil, which solves the technical problems that: on the premise of not adding a coil and a wave-blocking network, the parallel transmission of wireless energy information of several meters grade is realized through multiple relay coils, and the efficient energy transmission and the stable power output are not influenced.
In order to solve the technical problems, the invention provides a multi-relay wireless energy information parallel transmission system based on a bipolar coil, which is provided with an energy transmitting coil positioned at an energy transmitting side, an energy receiving coil positioned at an energy receiving side and N relay parallel transmission coils positioned between the energy transmitting side and the energy receiving side, wherein N is more than or equal to 1;
the energy transmitting coil, the energy receiving coil and the relay parallel transmission coil all adopt the same bipolar coil, and the bipolar coil comprises two homopolar planar coils L with the same size, material, wire diameter and winding direction 1 And L 2 Loop L of 1 And a coil L 2 In series connection with connection port T 3 Loop L of 1 Independent port of is T 1 Loop L of 2 Independent port of is T 2 ；
During energy transfer, the energy current follows the port T from the energy transmitting coil 1 Injection from port T 2 Flowing out;
during information transmission, the information current follows the port T of the energy transmitting coil or the energy receiving coil 1 And port T 2 Is injected and comes from the corresponding port T 3 And (4) flowing out.
Preferably, N of the relay parallel transmission coils have N coils L 1 And N coils L 2 Respectively denoted as coil L 11 ,L 21 ,…,L N1 Coil L 12 ,L 22 ,…,L N2 Loop L of j1 In parallel with a compensation capacitor C Dj1 Loop L of j2 Parallel connected with compensation capacitor C Dj2 Coils L in series j1 And a coil L j2 In parallel with a compensation capacitor C Pj ，j＝1,2,...,N；
During information transmission, the compensation capacitor C Dj1 And a coil L j1 Forming a first information relay resonant loop, compensating for the capacitance C Dj2 And a coil L j2 Forming a second information relay resonant loop;
during energy transmission, the compensation capacitor C Pj Coil L j1 And a coil L j2 Forming an energy relay resonant loop.
Preferably, the coil L j1 Coil L j2 And a compensation capacitor C Dj1 And a compensation capacitor C Dj2 The parameters of (1) satisfy:
L j1 ＝L j2 ,C Dj1 ＝C Dj2 ；
the resonant frequency of the first information relay resonant loop satisfies:
the resonance frequency of the second information relay resonance loop satisfies:
the resonance frequency of the energy relay resonance loop satisfies:
M j1-j2 indicating the coil L j1 And L j2 Mutual inductance between them.
Preferably, the energy transmitting coil is connected with a compensation capacitor C in series DT1 And a compensation capacitor C DT2 One end of the energy transmitting coil is also connected with a compensating capacitor C PT One end of the energy transmitting coil is connected with the output end of the high-frequency inverter, and the other end of the energy transmitting coil is connected with the other end of the high-frequency inverterOutputting;
the energy transmitting coil has 1 coil L 1 And a coil L 2 Respectively denoted as coil L T1 And a coil L T2 In the compensation capacitor C DT1 And a compensation capacitor C DT2 Common terminal and coil L T1 And a coil L T2 An information demodulation and modulation circuit is connected between the public ends;
during information transmission, the compensation capacitor C DT1 And a coil L T1 Forming a first information transceiving resonant circuit and a compensation capacitor C DT2 And a coil L T2 Forming a second information transceiving resonant circuit;
during energy transmission, the compensation capacitor C PT And a coil L T1 And a coil L T2 An energy emitting resonant circuit is formed. Preferably, the compensation capacitor C DT1 And a compensation capacitor C DT2 And a compensation capacitor C PT The parameters of (1) satisfy:
C DT1 ＝C DT2 ＝C Dj1 ＝C Dj2 ,C PT ＝C Pj 。
preferably, the energy receiving coil is connected in parallel with a compensation capacitor C connected in series DR1 And a compensation capacitor C DR2 One end of the energy receiving coil is also connected with a compensation capacitor C PR The other end of the energy receiving coil is connected with the output end of the other end of the rectification filter circuit;
1 coil L of the energy receiving coil 1 And a coil L 2 Respectively denoted as coil L R1 And a coil L R2 In the compensation capacitor C DR1 And a compensation capacitor C DR2 Common terminal and coil L R1 And a coil L R2 An information modulation and demodulation circuit is connected between the public terminals;
during information transmission, the compensation capacitor C DR1 And a coil L R1 Forming a first information transmitting/receiving resonant circuit and a compensation capacitor C DR2 And a coil L R2 Forming a second information transmitting-receiving resonant circuit;
during energy transmission, the compensation capacitor C PR Coil L R1 Line of sumRing L R2 An energy receiving resonant circuit is formed. Preferably, the compensation capacitor C DR1 And a compensation capacitor C DR2 And a compensation capacitor C PR Satisfies the following parameters:
C DR1 ＝C DR2 ＝C Dj1 ＝C Dj2 ,C PR ＝C Pj 。
the invention provides a multi-relay wireless energy information parallel transmission system based on a bipolar coil, which integrally comprises an energy transmission channel and an information transmission channel;
the energy transmission channel comprises an energy transmitting end and an energy receiving end, the energy transmitting end comprises a direct-current power supply, the high-frequency inverter and the energy transmitting resonant circuit which are sequentially connected, and the energy receiving end comprises an energy receiving resonant circuit, the rectifying and filtering circuit and a load which are sequentially connected;
the information transmission channel comprises an information transceiving end and an information transceiving end, the information transceiving end comprises the information demodulation and modulation circuit, the first information transceiving resonant circuit and the second information transceiving resonant circuit which are sequentially connected, and the information transceiving end comprises the information demodulation and modulation circuit, the first information transceiving resonant circuit and the second information transceiving resonant circuit which are sequentially connected;
when information is transmitted from an energy receiving side to an energy transmitting side, the information modulation and demodulation circuit modulates the information to be transmitted, the first information transmitting and receiving resonant circuit, the second information transmitting and receiving resonant circuit, the plurality of first information relaying resonant circuits, the plurality of second information relaying resonant circuits, the plurality of first information transmitting and receiving resonant circuits and the plurality of second information transmitting and receiving resonant circuits are used for wireless transmission step by step, and finally the information demodulation and modulation circuit demodulates the information;
when information is transmitted from an energy transmitting side to an energy receiving side, the information demodulation and modulation circuit modulates the information to be transmitted, the first information transceiving resonance circuit and the second information transceiving resonance circuit perform wireless transmission step by step through the plurality of first information relaying resonance circuits, the second information relaying resonance circuits, the first information transceiving resonance circuit and the second information transceiving resonance circuit, and finally the information demodulation and modulation circuit performs demodulation.
Preferably, the bipolar coil is a circular ring, and the coil L is a circular ring 1 And a coil L 2 Is in a semicircular ring shape.
The invention provides a multi-relay wireless energy information parallel transmission system based on a bipolar coil, which designs the bipolar coil with a special structure, and during energy transmission, energy current follows a port T of the bipolar coil 1 Injection from port T 2 Flowing out; during information transmission, the information current follows the simultaneous from the bipolar coil port T 1 And port T 2 Is injected and comes from the corresponding port T 3 And (4) flowing out. The system applies the bipolar coil to the energy transmitting coil, the energy receiving coil and the N relay parallel transmission coils, so that the topological structure of the dual-frequency resonator of the energy and the information is designed by utilizing the induced voltage direction characteristic brought by the structural characteristic of the bipolar coil (the information modulation and demodulation circuit is injected into the transmitting resonator and the receiving resonator), and the cross interference between the energy and information current resonant loops is avoided. The system only adopts a group of coils (and corresponding compensation capacitors), does not need to design a wave resistance network, has small overall occupied space, simple structure and safe use, and can ensure the long-distance, high-efficiency, high-speed and stable transmission of energy and information under the condition of multiple relay coils.
Drawings
FIG. 1 is a diagram illustrating energy current and magnetic field of a bipolar coil according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of information current and magnetic field of a bipolar coil according to an embodiment of the present invention;
fig. 3 is a topological diagram of a bipolar coil-based multi-relay wireless energy information parallel transmission system according to an embodiment of the present invention;
FIG. 4 is a diagram of a bipolar coil energy and information resonant loop according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which are given solely for the purpose of illustration and are not to be construed as limitations of the invention, including the drawings which are incorporated herein by reference and for illustration only and are not to be construed as limitations of the invention, since many variations thereof are possible without departing from the spirit and scope of the invention.
The embodiment of the invention provides a multi-relay wireless energy information parallel transmission system based on a bipolar coil, which is provided with an energy transmitting coil positioned on an energy transmitting side, an energy receiving coil positioned on an energy receiving side and N relay parallel transmission coils positioned between the energy transmitting side and the energy receiving side, wherein N is more than or equal to 1. In this embodiment, the energy transmitting coil, the energy receiving coil and the relay parallel transmission coil all use the same bipolar coil, and the bipolar coil includes two homopolar planar coils L with the same size, material, wire diameter and winding direction 1 And L 2 Loop L of 1 And a coil L 2 In series connection with a connection port of T 3 Loop L of 1 Independent port of is T 1 Loop L of 2 Independent port of is T 2 . According to faraday's law, the magnetic field has a polarity that is aligned with the current flow direction, and thus the energy current has a polarity opposite to the induced voltage generated by the information current in the bipolar coil.
During energy transfer, the energy current follows the port T of the secondary energy transmitting coil 1 Injection from port T 2 And out as shown in fig. 1. According to Faraday's law, the polarity of the magnetic field generated by the current is consistent with the flowing direction of the current, so that the energy current generates the magnetic field phi in the bipolar coil P-l And phi P-r The polarities are the same.
During information transmission, the information current follows the port T of the energy transmitting coil or the energy receiving coil 1 And port T 2 Injected into and from the corresponding port T 3 And out as shown in fig. 2. According to Faraday's law, the polarity of the magnetic field generated by the current is consistent with the flowing direction of the current, so that the energy current and the information current generate a magnetic field phi in the bipolar coil D-l And phi D-r The polarity is reversed.
Is taken as a kind of goodIn an alternative embodiment, as shown in FIGS. 1 and 2, the bipolar coil is circular and the coil L is 1 And a coil L 2 The coil is in a semicircular shape, and the middle part of the inner side of the semicircular coil is set to be in arc transition. The invention does not strictly limit the specific shape of the bipolar coil, and the actual application depends on specific requirements.
The circuit topology of the multi-relay wireless energy information parallel transmission system based on the bipolar coil is shown in fig. 3, and it can be seen that N relay parallel transmission coils have N coils L 1 And N coils L 2 Respectively denoted as coil L 11 ,L 21 ,…,L N1 Coil L 12 ,L 22 ,…,L N2 Loop L of j1 Parallel connected with compensation capacitor C Dj1 Loop L of j2 In parallel with a compensation capacitor C Dj2 Coils L in series j1 And a coil L j2 In parallel with a compensation capacitor C Pj ，j＝1,2,...,N。
During information transmission, the compensation capacitor C Dj1 And a coil L j1 Forming a first information relay resonant loop, compensating for the capacitance C Dj2 And a coil L j2 Forming a second information relay resonant loop with very small energy current passing through the compensation capacitor C Dj1 And C Dj2 . During energy transmission, the compensation capacitor C Pj And a coil L j1 And a coil L j2 Forming an energy relay resonant loop, and only a very small amount of information current passes through the compensation capacitor C Pj . Taking j =1 as an example, the corresponding first information relay resonant loop, second information relay resonant loop, and energy relay resonant loop are as shown in fig. 4.
In the present embodiment, the coil L j1 Coil L j2 And a compensation capacitor C Dj1 And a compensation capacitor C Dj2 The parameters of (1) satisfy:
L j1 ＝L j2 ,C Dj1 ＝C Dj2 ；
the resonance frequency of the first information relay resonance loop satisfies:
the resonance frequency of the second information relay resonance loop satisfies:
the resonance frequency of the energy relay resonance loop satisfies:
M j1-j2 indicating the coil L j1 And L j2 Mutual inductance between them.
As shown in FIG. 3, the energy transmitting coil is connected in series with a compensation capacitor C DT1 And a compensation capacitor C DT2 One end of the energy transmitting coil is also connected with a compensating capacitor C PT The other end of the energy transmitting coil is connected with the output end of the other end of the high-frequency inverter;
energy transmitting coil having 1 coil L 1 And a coil L 2 Respectively denoted as coil L T1 And a coil L T2 In the compensation capacitor C DT1 And a compensation capacitor C DT2 Common terminal and coil L T1 And a coil L T2 An information demodulation and modulation circuit is connected between the public ends;
during information transmission, the compensation capacitor C DT1 And a coil L T1 Forming a first information transceiving resonant circuit and a compensation capacitor C DT2 And a coil L T2 Forming a second information transceiving resonant circuit;
during energy transmission, the compensation capacitor C PT Coil L T1 And a coil L T2 An energy emitting resonant circuit is formed. Compensation capacitor C DT1 And a compensation capacitor C DT2 And a compensation capacitor C PT The parameters of (1) satisfy:
C DT1 ＝C DT2 ＝C Dj1 ＝C Dj2 ,C PT ＝C Pj 。
as shown in FIG. 3, the energy receiving coil is connected in parallel with a compensation capacitor C connected in series DR1 And a compensation capacitor C DR2 One end of the energy receiving coil is also connected with a compensation capacitor C PR The other end of the energy receiving coil is connected with the output end of the other end of the rectification filter circuit;
energy receiving coil having 1 coil L 1 And a coil L 2 Respectively noted as coil L R1 And a coil L R2 In the compensation capacitor C DR1 And a compensation capacitor C DR2 Common terminal and coil L R1 And a coil L R2 An information modulation and demodulation circuit is connected between the public terminals;
during information transmission, the compensation capacitor C DR1 And a coil L R1 Forming a first information transmitting-receiving resonant circuit and a compensation capacitor C DR2 And a coil L R2 Forming a second information transmitting-receiving resonant circuit;
during energy transmission, the compensation capacitor C PR Coil L R1 And a coil L R2 An energy receiving resonant circuit is formed.
Compensation capacitor C DR1 And a compensation capacitor C DR2 And a compensation capacitor C PR The parameters of (1) satisfy:
C DR1 ＝C DR2 ＝C Dj1 ＝C Dj2 ,C PR ＝C Pj 。
referring to fig. 3, the bipolar coil-based multi-relay wireless energy information parallel transmission system includes an energy transmission channel and an information transmission channel.
The energy transmission channel comprises an energy transmitting end and an energy receiving end, the energy transmitting end comprises a direct-current power supply, a high-frequency inverter and an energy transmitting resonant circuit which are sequentially connected, and the energy receiving end comprises an energy receiving resonant circuit, a rectifying and filtering circuit and a load which are sequentially connected. The information transmission channel comprises an information transceiving end and an information transceiving end, the information transceiving end comprises an information demodulation and modulation circuit, a first information transceiving resonant circuit and a second information transceiving resonant circuit which are sequentially connected, and the information transceiving end comprises an information demodulation and modulation circuit, a first information transceiving resonant circuit and a second information transceiving resonant circuit which are sequentially connected.
How to transmit energy is disclosed in the prior art, and this embodiment is not described in detail. With regard to information transmission, the present system can only achieve half-duplex communication.
When information is transmitted from the energy receiving side to the energy transmitting side (the situation shown in fig. 3), the information modulation and demodulation circuit modulates the information to be transmitted, the first information transmitting and receiving resonant circuit, the second information transmitting and receiving resonant circuit, the plurality of first information relaying resonant circuits, the plurality of second information relaying resonant circuits, the plurality of first information transmitting and receiving resonant circuits, and the plurality of second information transmitting and receiving resonant circuits are used for wireless transmission step by step, and finally, the information demodulation modulation circuit is used for demodulation.
When information is transmitted from the energy transmitting side to the energy receiving side, the information demodulation modulation circuit modulates the information to be transmitted, the first information transceiving resonance circuit and the second information transceiving resonance circuit perform wireless transmission step by step through a plurality of first information relay resonance loops, second information relay resonance loops, a first information transmitting and receiving resonance circuit and a second information transmitting and receiving resonance circuit, and finally the information demodulation modulation circuit performs demodulation.
Take an injection type five-coil wireless energy information parallel transmission system as an example. U shape dc For the emitter connected to the DC voltage source input of the rectifier, U L Is a load resistance R L The output voltage of (1). S. the 1 -S 4 And D 1 -D 4 An inverter and a rectifier for electric energy conversion are constructed. L is Ti 、L ji And L Ri (i =1,2,j =1,2,3) respectively constitute an energy transmitting coil, an energy receiving coil, and 3 relay parallel transmission coils. Compensation capacitor C PT 、C DTi 、C Pj 、C Dji 、C PR And C DRi (i =1,2,j =1,2,3) is provided in each resonator to construct an independent energy and information resonant loop, M x-y (x, y = Ti, ji, ri, i =1,2, j =1,2, 3) is defined as the mutual inductance between coil i and coil j.
Each stage of coil in the injection type multi-relay wireless energy information parallel transmission system has the same size and the same number of turns, and the self inductance of the coil, the compensation capacitance and the mutual inductance between adjacent coils are set to be the same value. Furthermore, the mutual inductance between the non-coaxial coils is relatively small and can be ignored in this analysis.
Based on fundamental analysis, the phase form of the inverter output voltage can be expressed as:
the equivalent input resistance of the rectifier can be expressed as:
R eq ＝8/π 2 ·R L 。
impedance Z of each resonator in the energy loop Pi (i = T,1,2,3, r) is defined as:
based on Kirchhoff's Voltage Law (KVL), a multi-relay wireless energy parallel transmission system energy channel containing five bipolar coils can be expressed as:
wherein the content of the first and second substances,
is a vector representation of the energy current of the respective bipolar coil, M x-y (x, y = T,1,2,3, r) is the mutual inductance between the respective bipolar coils, which can be given by the following expression:
M x-y ＝M x1-y1 +M x2-y2 。
operating frequency f of energy transfer due to cross-coupling between non-adjacent bipolar coils PO Will shift slightly from the designed resonant frequency f PR To keep the system energy constant voltage output in phase with the input voltage current.
Information ringImpedance Z of each resonator in the path Di (i = T,1,2,3, r) is defined as:
ω D representing the operating angular frequency of the information transmission.
Based on Kirchhoff's Voltage Law (KVL), a multi-relay wireless energy parallel transmission system information channel containing five bipolar coils can be expressed as:
wherein the content of the first and second substances,
is a vector representation of the information current of the respective bipolar coil, U Din Is defined as the output voltage of the information modulation circuit, R Deq Is an equivalent input resistance of the information demodulation circuit. The voltage gain of the information transmission channel can be expressed as:
to sum up, the multi-relay wireless energy information parallel transmission system based on the bipolar coil provided by the embodiment of the invention designs the bipolar coil with a special structure, and during energy transmission, energy current follows the port T of the bipolar coil 1 Injection from port T 2 Flowing out; during information transmission, the information current follows the simultaneous from the bipolar coil port T 1 And port T 2 Is injected and comes from the corresponding port T 3 And (4) flowing out. The system applies the bipolar coil to an energy transmitting coil, an energy receiving coil and N relay parallel transmission coils, thereby designing a dual-frequency resonator topological structure of energy and information (modulating and demodulating information) by utilizing the induced voltage direction characteristic brought by the structural characteristic of the bipolar coilThe tuning circuit is injected into the transmitting and receiving resonators), and cross interference between the energy and information current resonant loops is avoided. The system only adopts a group of coils (and corresponding compensation capacitors), does not need to design a wave resistance network, has small overall occupied space, simple structure and safe use, and can ensure the long-distance, high-speed and stable transmission of energy and information under the condition of multiple relay coils.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (9)
1. The multi-relay wireless energy information parallel transmission system based on the bipolar coil is characterized in that: the energy transmission device is provided with an energy transmitting coil positioned on an energy transmitting side, an energy receiving coil positioned on an energy receiving side and N relay parallel transmission coils positioned between the energy transmitting side and the energy receiving side, wherein N is more than or equal to 1;
the energy transmitting coil, the energy receiving coil and the relay parallel transmission coil all adopt the same bipolar coil, and the bipolar coil comprises two homopolar planar coils L with the same size, material, wire diameter and winding direction 1 And L 2 Loop L of 1 And a coil L 2 In series connection with connection port T 3 Loop L of 1 Independent port of is T 1 Loop L of 2 Independent port of is T 2 ；
During energy transfer, the energy current follows the port T from the energy transmitting coil 1 Injection from port T 2 Flowing out;
during information transmission, the information current follows the port T of the energy transmitting coil or the energy receiving coil 1 And port T 2 Is injected and comes from the corresponding port T 3 And (4) flowing out.
2. According to claimThe bipolar coil-based multi-relay wireless energy information parallel transmission system according to claim 1, wherein: n of the relay parallel transmission coils have N coils L 1 And N coils L 2 Respectively denoted as coil L 11 ,L 21 ,…,L N1 Coil L 12 ,L 22 ,…,L N2 Loop L of j1 Parallel connected with compensation capacitor C Dj1 Loop L of j2 Parallel connected with compensation capacitor C Dj2 Coils L connected in series j1 And a coil L j2 Parallel connected with compensation capacitor C Pj ，j＝1,2,...,N；
During information transmission, the compensation capacitor C Dj1 And a coil L j1 Forming a first information relay resonant loop, compensating for the capacitance C Dj2 And a coil L j2 Forming a second information relay resonant loop;
during energy transmission, the compensation capacitor C Pj And a coil L j1 And a coil L j2 Forming an energy relay resonant loop.
3. The bipolar coil based multi-relay wireless energy information parallel transmission system according to claim 1, wherein the coil L is a coil L j1 Coil L j2 And a compensation capacitor C Dj1 And a compensation capacitor C Dj2 The parameters of (1) satisfy:
L j1 ＝L j2 ,C Dj1 ＝C Dj2 ；
the resonant frequency of the first information relay resonant loop satisfies:
the resonance frequency of the second information relay resonance loop satisfies:
the resonance frequency of the energy relay resonance loop satisfies:
M j1-j2 represents the coil L j1 And L j2 Mutual inductance between them.
4. The bipolar coil based multi-relay wireless energy information parallel transmission system according to claim 3, wherein: the energy transmitting coil is connected in series with a compensation capacitor C DT1 And a compensation capacitor C DT2 One end of the energy transmitting coil is also connected with a compensating capacitor C PT The other end of the energy transmitting coil is connected with the output end of the other end of the high-frequency inverter;
the energy transmitting coil has 1 coil L 1 And a coil L 2 Respectively noted as coil L T1 And a coil L T2 In the compensation capacitor C DT1 And a compensation capacitor C DT2 The common terminal and the coil L T1 And a coil L T2 An information demodulation and modulation circuit is connected between the public ends;
during information transmission, the compensation capacitor C DT1 And a coil L T1 Forming a first information transceiving resonant circuit and a compensation capacitor C DT2 And a coil L T2 Forming a second information transceiving resonant circuit;
during energy transmission, the compensation capacitor C PT And a coil L T1 And a coil L T2 An energy emitting resonant circuit is formed.
5. The bipolar coil based multi-relay wireless energy information parallel transmission system according to claim 4, wherein a compensation capacitor C DT1 And a compensation capacitor C DT2 And a compensation capacitor C PT The parameters of (1) satisfy:
C DT1 ＝C DT2 ＝C Dj1 ＝C Dj2 ,C PT ＝C Pj 。
6. the bipolar coil based multi-relay wireless energy information parallel transmission system according to claim 5, wherein: the energy receiving coil is connected in series with a compensation capacitor C DR1 And a compensation capacitor C DR2 One end of the energy receiving coil is also connected with a compensation capacitor C PR The other end of the energy receiving coil is connected with the output end at the other end of the rectification filter circuit;
1 coil L of the energy receiving coil 1 And a coil L 2 Respectively denoted as coil L R1 And a coil L R2 In a compensation capacitor C DR1 And a compensation capacitor C DR2 Common terminal and coil L R1 And a coil L R2 An information modulation and demodulation circuit is connected between the public ends;
during information transmission, the compensation capacitor C DR1 And a coil L R1 Forming a first information transmitting-receiving resonant circuit and a compensation capacitor C DR2 And a coil L R2 Forming a second information transmitting-receiving resonant circuit;
during energy transmission, the compensation capacitor C PR Coil L R1 And a coil L R2 An energy receiving resonant circuit is formed.
7. The bipolar coil based multi-relay wireless energy information parallel transmission system according to claim 6, wherein a compensation capacitor C DR1 And a compensation capacitor C DR2 And a compensation capacitor C PR The parameters of (1) satisfy:
C DR1 ＝C DR2 ＝C Dj1 ＝C Dj2 ,C PR ＝C Pj 。
8. the bipolar coil based multi-relay wireless energy information parallel transmission system according to claim 7, wherein: the device comprises an energy transmission channel and an information transmission channel;
the energy transmission channel comprises an energy transmitting end and an energy receiving end, the energy transmitting end comprises a direct-current power supply, the high-frequency inverter and the energy transmitting resonant circuit which are sequentially connected, and the energy receiving end comprises an energy receiving resonant circuit, the rectifying and filtering circuit and a load which are sequentially connected;
the information transmission channel comprises an information transceiving end and an information transceiving end, the information transceiving end comprises the information demodulation and modulation circuit, the first information transceiving resonant circuit and the second information transceiving resonant circuit which are sequentially connected, and the information transceiving end comprises the information demodulation and modulation circuit, the first information transceiving resonant circuit and the second information transceiving resonant circuit which are sequentially connected;
when information is transmitted from an energy receiving side to an energy transmitting side, the information modulation and demodulation circuit modulates the information to be transmitted, the first information transmitting and receiving resonant circuit, the second information transmitting and receiving resonant circuit, the plurality of first information relaying resonant circuits, the plurality of second information relaying resonant circuits, the plurality of first information transmitting and receiving resonant circuits and the plurality of second information transmitting and receiving resonant circuits are used for wireless transmission step by step, and finally the information demodulation and modulation circuit demodulates the information;
when information is transmitted from an energy transmitting side to an energy receiving side, the information demodulation and modulation circuit modulates the information to be transmitted, the first information transceiving resonance circuit and the second information transceiving resonance circuit perform wireless transmission step by step through the plurality of first information relaying resonance circuits, the second information relaying resonance circuits, the first information transceiving resonance circuit and the second information transceiving resonance circuit, and finally the information demodulation and modulation circuit performs demodulation.
9. The bipolar coil based multi-relay wireless energy information parallel transmission system according to any one of claims 1 to 8, wherein: the bipolar coil is annular, and the coil L is 1 And a coil L 2 Is in a semicircular ring shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211272037.0A CN115459461A (en) | 2022-10-18 | 2022-10-18 | Multi-relay wireless energy information parallel transmission system based on bipolar coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211272037.0A CN115459461A (en) | 2022-10-18 | 2022-10-18 | Multi-relay wireless energy information parallel transmission system based on bipolar coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115459461A true CN115459461A (en) | 2022-12-09 |
Family
ID=84310799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211272037.0A Pending CN115459461A (en) | 2022-10-18 | 2022-10-18 | Multi-relay wireless energy information parallel transmission system based on bipolar coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115459461A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115987363A (en) * | 2022-12-22 | 2023-04-18 | 西南交通大学 | Multi-relay wireless energy information parallel transmission system based on double-frequency resonance structure |
-
2022
- 2022-10-18 CN CN202211272037.0A patent/CN115459461A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115987363A (en) * | 2022-12-22 | 2023-04-18 | 西南交通大学 | Multi-relay wireless energy information parallel transmission system based on double-frequency resonance structure |
| CN115987363B (en) * | 2022-12-22 | 2024-07-05 | 西南交通大学 | Multi-relay wireless energy information parallel transmission system based on double-frequency resonance structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103560593B (en) | A kind of control method of field coupled type radio energy transmission system | |
| CN103329398B (en) | Power transmission system | |
| CN104539061B (en) | A kind of electric energy transmitting terminal, wireless electric energy transmission device and wireless power transmission method | |
| CN106849372B (en) | ECPT system and its Parameters design based on bilateral F-LCLC resonant network | |
| CN109617250B (en) | Anti-deviation wireless power transmission system based on combined topology | |
| CN105720582B (en) | A kind of particular harmonic eliminates radio energy transmission system and its design method | |
| CN109245231A (en) | A kind of wireless charging topological structure with nature constant pressure and flow output characteristics | |
| CN108448692A (en) | A kind of electric vehicle wireless charging topological structure with offset adaptivity | |
| CN109546758B (en) | Underwater wireless power transmission system for transmitting signals by using distributed capacitors | |
| CN111987813B (en) | Synchronous full-duplex communication wireless power transmission system based on single-coil coupling mechanism | |
| CN108390472A (en) | A kind of non-contact energy and signal synchronous transmission system and transmission method | |
| CN114825656B (en) | Wireless power and data synchronous transmission system and data modulation method | |
| CN114421646A (en) | Magnetic coupling wireless energy signal synchronous transmission system based on hybrid modulation | |
| CN109638978A (en) | A kind of efficient constant pressure and flow switching wireless charging topological structure | |
| CN206406776U (en) | A kind of wireless charging circuit of constant current constant voltage Compound Topology | |
| CN104242483B (en) | Magnet coupled resonant type multi-load radio energy chain transmission network with load isolation characteristic | |
| CN115459461A (en) | Multi-relay wireless energy information parallel transmission system based on bipolar coil | |
| CN110048520A (en) | Primary side has the wireless charging device of C-LCC compensation network | |
| CN115037062A (en) | Anti-offset hybrid wireless power transmission system and charging method thereof | |
| CN110417131A (en) | A kind of fundamental wave-harmonic wave passes the multichannel contactless power supply system of energy parallel | |
| CN204334131U (en) | A kind of electric energy transmitting terminal and wireless electric energy transmission device | |
| CN109217496B (en) | Parameter analysis method for bilateral LCC compensation circuit in wireless electric energy transmission system | |
| CN114552800A (en) | Magnetic resonance wireless power transmission system with receiving end high-order LC compensation | |
| CN109067184A (en) | A kind of inductive electric energy transmission system of constant current constant voltage seamless switching | |
| CN101795119B (en) | Common-mode signal suppression circuit and switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |