CN118238641A - Electric field-magnetic field hybrid coupling mechanism in stereo garage and energy communication and simultaneous transmission system thereof - Google Patents
Electric field-magnetic field hybrid coupling mechanism in stereo garage and energy communication and simultaneous transmission system thereof Download PDFInfo
- Publication number
- CN118238641A CN118238641A CN202410217615.3A CN202410217615A CN118238641A CN 118238641 A CN118238641 A CN 118238641A CN 202410217615 A CN202410217615 A CN 202410217615A CN 118238641 A CN118238641 A CN 118238641A
- Authority
- CN
- China
- Prior art keywords
- secondary side
- vehicle
- module
- primary side
- circuit
- 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
- 230000008878 coupling Effects 0.000 title claims abstract description 43
- 238000010168 coupling process Methods 0.000 title claims abstract description 43
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 43
- 230000007246 mechanism Effects 0.000 title claims abstract description 17
- 238000004891 communication Methods 0.000 title claims abstract description 13
- 230000005540 biological transmission Effects 0.000 title abstract description 51
- 239000002184 metal Substances 0.000 claims abstract description 31
- 230000008054 signal transmission Effects 0.000 claims abstract description 30
- 239000003990 capacitor Substances 0.000 claims abstract description 27
- 230000005684 electric field Effects 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims description 25
- 238000005070 sampling Methods 0.000 claims description 11
- 238000012546 transfer Methods 0.000 claims description 4
- 238000006880 cross-coupling reaction Methods 0.000 abstract description 5
- 238000004088 simulation Methods 0.000 description 19
- 238000010586 diagram Methods 0.000 description 17
- 208000017096 leukoencephalopathy with calcifications and cysts Diseases 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000009795 derivation Methods 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
- B60L53/126—Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H6/00—Buildings for parking cars, rolling-stock, aircraft, vessels or like vehicles, e.g. garages
- E04H6/42—Devices or arrangements peculiar to garages, not covered elsewhere, e.g. securing devices, safety devices, monitoring and operating schemes; centering devices
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Architecture (AREA)
- Computer Networks & Wireless Communication (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The application provides an electric field-magnetic field hybrid coupling mechanism in a stereo garage and an energy communication and simultaneous transmission system thereof. The wireless power transmission system is used for solving the problem that the existing wireless power transmission system cannot meet the use requirement of the stereo garage. The three-dimensional garage comprises a plurality of parking modules which are arranged at equal intervals along the vertical direction, wherein the parking modules comprise metal car carrying plates, and the rear ends of the parking modules are provided with transmitting coils L p; the bottom and the top of the vehicle to be charged are both provided with vehicle-mounted electrode plates, the rear part of the vehicle to be charged is provided with a receiving coil L s, the two vehicle-mounted electrode plates respectively form two groups of electric field coupling modules with the metal vehicle-mounted plate for parking the vehicle to be charged and the metal vehicle-mounted plate of the parking module above the two vehicle-mounted electrode plates, and the transmitting coil L p and the receiving coil L s form a magnetic field coupling module. According to the structural characteristics of the stereo garage, the six-capacitor cross coupling model is built based on the vehicle carrying plate and is used as a signal transmission channel, and the magnetic field coupling module is used as an electric energy transmission channel. Thereby realizing full duplex transmission.
Description
Technical Field
The invention relates to the field of wireless power transmission, in particular to an electric field-magnetic field hybrid coupling mechanism in a stereo garage and an energy communication and simultaneous transmission system thereof.
Background
In recent years, along with the increase of the global electric automobile conservation amount, the number of special parking spaces for the electric automobile is gradually increased, and the contradiction between the occupied area of the parking spaces and the limited land area can be effectively solved by the stereo garage, but at present, the stereo garage for charging the electric automobile is fresh. Because the charging wires in the stereo garage are distributed in disorder by adopting a traditional wired charging mode, a series of potential safety hazards are brought. In addition, the wired charging mode also needs to adopt a manipulator to assist in the plugging operation, so that the volume and the weight of the stereo garage are increased, and the charging cost of the electric vehicle is increased.
In recent years, WPT technology for wireless power transmission has been rapidly developed, which has achieved a great deal of research results in the field of electric vehicles, and wireless charging demonstration devices for electric vehicles are built in many places around the world. However, although the WPT technology has been increasingly developed in the field of electric vehicles, researches on wireless charging technologies of electric vehicles in a stereo garage are very few, in the prior art, magnetic field coupling type wireless power transmission MC-WPT technology is adopted for wireless charging of electric vehicles in the stereo garage, and a charging coil of the charging technology is generally arranged on a metal vehicle carrying board, and influence of the metal vehicle carrying board on wireless charging is not considered. In practice, under the action of the high-frequency alternating electromagnetic field, great eddy current loss can be generated on the metal vehicle carrying plate, and the output power, the transmission efficiency and the system safety of the system can be seriously affected.
Disclosure of Invention
The invention aims to provide an electric field-magnetic field hybrid coupling mechanism in a stereo garage and an energy communication and simultaneous transmission system thereof. The wireless power transmission system is used for solving the problem that the existing wireless power transmission system in the prior art cannot meet the use requirement of the stereo garage.
An electric field-magnetic field hybrid coupling mechanism in a stereo garage comprises a plurality of parking modules which are arranged at equal intervals along the vertical direction, wherein the parking modules comprise metal car carrying plates, and the rear ends of the parking modules are provided with transmitting coils L p;
The bottom and the top of the vehicle to be charged are both provided with vehicle-mounted electrode plates, the rear part of the vehicle to be charged is provided with a receiving coil L s, the vehicle-mounted electrode plates are all arranged in parallel with the metal vehicle-mounted plate, the two vehicle-mounted electrode plates of the vehicle to be charged respectively form two groups of electric field coupling modules with the metal vehicle-mounted plate for parking the vehicle to be charged and the metal vehicle-mounted plate of the parking module above the vehicle to be charged, and the transmitting coil L p and the receiving coil L s form a magnetic field coupling module.
An energy communication system comprises the electric field-magnetic field hybrid coupling mechanism in the stereo garage.
Optionally, the energy transmission circuit further comprises an energy transmission circuit, wherein the energy transmission circuit comprises a power supply module, a primary side electric energy conversion module, a secondary side electric energy conversion module and a load R L;
The input end of the primary side electric energy conversion module is connected with the power supply module, the output end of the primary side electric energy conversion module is communicated with the transmitting coil L p, the input end of the secondary side electric energy conversion module is communicated with the receiving coil L s, and the output end of the secondary side electric energy conversion module is communicated with the load R L.
Optionally, the system further comprises a signal transmission circuit, wherein the signal transmission circuit comprises a primary side modulation-demodulation module and a secondary side modulation-demodulation module;
The primary side modem module is connected in series with one end of the transmitting coil L p, and the metal vehicle carrying plate for parking the vehicle to be charged and the metal vehicle carrying plate of the parking module above the metal vehicle carrying plate are communicated with the other end of the transmitting coil L p and the primary side modem module through the control switch S i;
The secondary side modem module is connected in series with one end of the receiving coil L s, and vehicle-mounted electrode plates at the bottom and the top of the vehicle to be charged are communicated with the other end of the receiving coil L s and the secondary side modem module.
Optionally, the primary side electric energy conversion module comprises a high-frequency inverter circuit, a primary side LCC compensation circuit and a primary side power high-frequency wave-blocking network submodule;
The input end of the high-frequency inverter circuit is connected with the power supply module, the input end of the primary side LCC compensation circuit is connected with the output end of the high-frequency inverter circuit, one end of the primary side power high-frequency wave-blocking network sub-module is connected with one end of the primary side LCC compensation circuit, and the other end of the primary side power high-frequency wave-blocking network sub-module is respectively communicated with two ends of the transmitting coil L p with the other end of the primary side LCC compensation circuit.
Optionally, the secondary side electric energy conversion module comprises a secondary side power compensation capacitor C s, a rectifying circuit and a secondary side power high-frequency wave-blocking network submodule;
One end of the receiving coil L s is communicated with one input end of the rectifying circuit, the other end of the receiving coil L s is communicated with one end of the secondary side power high-frequency wave-blocking network submodule, the other end of the secondary side power high-frequency wave-blocking network submodule is communicated with one end of the secondary side power compensation capacitor C s, the other end of the secondary side power compensation capacitor C s is communicated with the other input end of the rectifying circuit, and the output end of the rectifying circuit is communicated with the load R L.
Optionally, the primary power high-frequency choke network submodule comprises a first primary power high-frequency choke network and a second primary power high-frequency choke network which are connected in series;
The secondary side power high-frequency wave-blocking network submodule comprises a first secondary side power high-frequency wave-blocking network and a second secondary side power high-frequency wave-blocking network which are connected in series.
Optionally, the primary side modulation and demodulation module comprises a primary side signal modulation sub-module and a primary side signal demodulation sub-module;
The primary side signal modulation submodule is connected in parallel with the primary side signal demodulation submodule, the primary side signal modulation submodule comprises a primary side signal modulation circuit U s1 and a first primary side signal high-frequency wave-blocking network which are connected in series, and the primary side signal demodulation submodule comprises a primary side sampling resistor R s1 and a second primary side signal high-frequency wave-blocking network which are connected in series.
Optionally, the secondary side modulation and demodulation module comprises a secondary side signal modulation sub-module and a secondary side signal demodulation sub-module;
The secondary side signal modulation submodule is connected in parallel with the secondary side signal demodulation submodule, the secondary side signal modulation submodule comprises a secondary side signal modulation circuit U s2 and a first secondary side signal high-frequency wave-blocking network which are connected in series, and the secondary side signal demodulation submodule comprises a secondary side sampling resistor R s2 and a second secondary side signal high-frequency wave-blocking network which are connected in series.
Optionally, the primary side signal modulation circuit U s1 and the secondary side signal modulation circuit U s2 both modulate signals in an on-off keying OOK mode.
Due to the adoption of the technical scheme, the invention has the following advantages:
according to the structural characteristics of the stereo garage, the six-capacitor cross coupling model is built based on the vehicle carrying plate and is used as a signal transmission channel, and the magnetic field coupling mechanism is used as an electric energy transmission channel. The LC parallel resonance network is designed to be used as a wave blocker based on different carrier frequencies, so that the signal of the set frequency can pass smoothly while the signal of the other frequency is blocked, and no time delay exists, thereby realizing full duplex transmission.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof.
Drawings
The drawings of the present invention are described below.
Fig. 1 is a schematic diagram of a communication system in a stereo garage according to the present invention.
Fig. 2 is an equivalent circuit diagram of two electric field coupling modules according to the present invention.
Fig. 3 is a circuit topology diagram of the energy communication system of the present invention.
Fig. 4 is a topology diagram of a power transmission circuit in a power transmission mode according to the present invention.
Fig. 5 is a topology diagram of a signal transmission mode signal forward transmission circuit according to the present invention.
Fig. 6 is a diagram of a T-type decoupling equivalent circuit of the forward transmission circuit of fig. 5 according to the present invention.
Fig. 7 is a schematic diagram of the equivalent circuit of the crosstalk between power versus signal in the system of the present invention.
Fig. 8 is a schematic diagram of the equivalent circuit of crosstalk in the forward transmission signal of the system of the present invention.
Fig. 9 is a waveform diagram of the inverted output of the system with only power transfer in simulation of the present invention.
Fig. 10 is a waveform diagram of a load when the system is only transmitting power during simulation according to the present invention.
Fig. 11 is a waveform diagram of simulation with only signal transmission in the simulation system of the present invention.
Fig. 12 is a waveform diagram of signals during synchronous transmission of system power and signals during simulation according to the present invention.
Fig. 13 is a graph of crosstalk waveforms for system power versus signal transmission during simulation in accordance with the present invention.
Fig. 14 is a diagram showing crosstalk of U s1 to R s2 in the system signal transmission process during simulation according to the present invention.
Fig. 15 is a diagram showing crosstalk of the system signal transmission process U s2 to R s1 during simulation according to the present invention.
In the figure: 1-a metal vehicle carrying plate; 2-vehicle-mounted electrode plates.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Example 1:
The electric field-magnetic field hybrid coupling mechanism in the stereo garage shown in fig. 1 comprises a plurality of parking modules which are arranged at equal intervals along the vertical direction, wherein the parking modules comprise metal car carrying plates 1, and the rear ends of the parking modules are provided with transmitting coils L p;
The bottom and the top of waiting to charge the vehicle all are provided with on-vehicle electrode plate 2, and the rear portion of waiting to charge the vehicle is provided with receiving coil L s, on-vehicle electrode plate 2 all with metal carries sweep 1 parallel arrangement, and two on-vehicle electrode plates 2 of waiting to charge the vehicle constitute two sets of electric field coupling modules with the metal that waits to charge the vehicle and park on-vehicle sweep 1 and the metal that parks the module above thereof respectively, transmitting coil L p constitutes magnetic field coupling module with receiving coil L s.
In this embodiment, the stereo garage is a vertical rotary stereo garage, and the power end and the vehicle-mounted end are respectively provided with an electric energy conversion device and a signal transmitting and receiving module, the electric energy transmission channel mainly comprises a magnetic field coupling module, and the signal transmission channel comprises a magnetic field coupling coil and an electric field coupling electrode. Under the action of the high-frequency alternating electric field, the two groups of electric field coupling modules form six cross coupling capacitors shown in fig. 2 (a), the six-capacitor cross coupling model can be equivalent to a three-capacitor pi model shown in fig. 2 (b), and the three-capacitor pi model can be equivalent to a three-capacitor T model shown in fig. 2 (c).
Example 2:
An energy communication system as shown in fig. 1 and 3 comprises the electric field-magnetic field hybrid coupling mechanism in the stereo garage; the energy transmission circuit comprises a power supply module, a primary side electric energy conversion module, a secondary side electric energy conversion module and a load R L;
The input end of the primary side electric energy conversion module is connected with the power supply module, the output end of the primary side electric energy conversion module is communicated with the transmitting coil L p, the input end of the secondary side electric energy conversion module is communicated with the receiving coil L s, and the output end of the secondary side electric energy conversion module is communicated with the load R L.
In this embodiment, the power module is a dc power supply U dc, and the load R L is a battery module of a vehicle to be charged.
The invention also comprises a signal transmission circuit, wherein the signal transmission circuit comprises a primary side modem module and a secondary side modem module;
The primary side modem module is connected in series with one end of the transmitting coil L p, and the metal vehicle carrying plate 1 for parking the vehicle to be charged and the metal vehicle carrying plate 1 of the parking module above the metal vehicle carrying plate are communicated with the other end of the transmitting coil L p and the primary side modem module through the control switch S i;
The secondary side modem module is connected in series with one end of the receiving coil L s, and the vehicle-mounted electrode plates 2 at the bottom and the top of the vehicle to be charged are communicated with the other end of the receiving coil L s and the secondary side modem module.
In this embodiment, as shown in fig. 1, the metal vehicle carrying plate 1 of the parking vehicle to be charged at the lowest position and the metal vehicle carrying plate 1 of the parking module above the parking vehicle are respectively communicated with the other end of the transmitting coil L p and the primary side modem module through control switches S 1 and S 2, when the signal transmission is required to be carried out on the vehicle to be charged at the lowest position, the control switch S 3 is opened and the control switches S 1 and S 2 are closed, and when the signal transmission is required to be carried out on the vehicle to be charged at the second layer, the control switch S 2 is opened and the control switches S 3 and S 4 are closed, and so on.
As an embodiment of the invention, the primary side electric energy conversion module comprises a high-frequency inverter circuit, a primary side LCC compensation circuit and a primary side power high-frequency wave-blocking network submodule;
The input end of the high-frequency inverter circuit is connected with the power supply module, the input end of the primary side LCC compensation circuit is connected with the output end of the high-frequency inverter circuit, one end of the primary side power high-frequency wave-blocking network sub-module is connected with one end of the primary side LCC compensation circuit, and the other end of the primary side power high-frequency wave-blocking network sub-module is respectively communicated with two ends of the transmitting coil L p with the other end of the primary side LCC compensation circuit.
As an embodiment of the invention, the secondary side power conversion module comprises a secondary side power compensation capacitor C s, a rectifying circuit and a secondary side power high-frequency wave-blocking network submodule;
One end of the receiving coil L s is communicated with one input end of the rectifying circuit, the other end of the receiving coil L s is communicated with one end of the secondary side power high-frequency wave-blocking network submodule, the other end of the secondary side power high-frequency wave-blocking network submodule is communicated with one end of the secondary side power compensation capacitor C s, the other end of the secondary side power compensation capacitor C s is communicated with the other input end of the rectifying circuit, and the output end of the rectifying circuit is communicated with the load R L.
In this embodiment, as shown in fig. 3, the primary LCC compensation circuit includes an inductor L f1, a capacitor C f1, and a capacitor C p, the high-frequency inverter circuit is a high-frequency inverter formed by four MOSFET tubes S 1-S4, and the rectifier circuit is formed by four rectifier bridge diodes D 1-D4.
As an embodiment of the invention, the primary power high-frequency choke network submodule comprises a first primary power high-frequency choke network and a second primary power high-frequency choke network which are connected in series; the secondary side power high-frequency wave-blocking network submodule comprises a first secondary side power high-frequency wave-blocking network and a second secondary side power high-frequency wave-blocking network which are connected in series.
In this embodiment, the first primary power high-frequency choke network includes a capacitor C t1 and an inductor L t1 connected in parallel, the second primary power high-frequency choke network includes a capacitor C t2 and an inductor L t2 connected in parallel, the first secondary power high-frequency choke network includes a capacitor C r1 and an inductor L r1 connected in parallel, and the second secondary power high-frequency choke network includes a capacitor C r2 and an inductor L r2 connected in parallel.
As an embodiment of the present invention, the primary side modem module includes a primary side signal modulation sub-module and a primary side signal demodulation sub-module;
The primary side signal modulation submodule is connected in parallel with the primary side signal demodulation submodule, the primary side signal modulation submodule comprises a primary side signal modulation circuit U s1 and a first primary side signal high-frequency wave-blocking network which are connected in series, and the primary side signal demodulation submodule comprises a primary side sampling resistor R s1 and a second primary side signal high-frequency wave-blocking network which are connected in series.
As an embodiment of the present invention, the secondary side modem module includes a secondary side signal modulation sub-module and a secondary side signal demodulation sub-module;
The secondary side signal modulation submodule is connected in parallel with the secondary side signal demodulation submodule, the secondary side signal modulation submodule comprises a secondary side signal modulation circuit U s2 and a first secondary side signal high-frequency wave-blocking network which are connected in series, and the secondary side signal demodulation submodule comprises a secondary side sampling resistor R s2 and a second secondary side signal high-frequency wave-blocking network which are connected in series.
In this embodiment, the first primary-side signal high-frequency choke network includes a capacitor C 2 and an inductor L 2 connected in parallel, the second primary-side power high-frequency choke network includes a capacitor C 1 and an inductor L 1 connected in parallel, the first secondary-side power high-frequency choke network includes a capacitor C 3 and an inductor L 3 connected in parallel, and the second secondary-side power high-frequency choke network includes a capacitor C 4 and an inductor L 4 connected in parallel.
As an embodiment of the present invention, the primary side signal modulation circuit U s1 and the secondary side signal modulation circuit U s2 both use an on-off keying OOK modulation method to generate signal carriers, and the principle thereof may be expressed as follows:
Wherein: a and ω s are the amplitude and angular frequency of the carrier signal, respectively, and when the transmitted data is "1", the signal carrier is sinusoidal, and when it is "0", there is no carrier on the signal path.
In this embodiment, when only a single vehicle is considered for wireless charging, the full duplex wireless power and signal parallel transmission system circuit topology is as shown in fig. 3. In the figure, U dc is a direct current input voltage, which is injected into a primary side LCC compensation circuit after high-frequency inversion, the angular frequency of the inverted output voltage is ω (ω=2pi f), and electric energy transmission is realized under the action of a magnetic field coupling coil. U s1 and U s2 are respectively equivalent alternating current signal sources modulated by a power supply end and a vehicle-mounted end, the angular frequencies of the equivalent alternating current signal sources are omega 1 and omega 2 respectively (omega 1<ω2),Rs1 and R s2 are set to be signal sampling resistors of the vehicle-mounted end and the power supply end respectively, and full duplex communication is realized under the action of an electric field coupling electrode and a magnetic field coupling coil.
In the present embodiment, LC elements of four sets of high-frequency choke networks (C t1,Lt1)、(Ct2,Lt2)、(Cr1,Lr1) and (C r2,Lr2) each satisfy a parallel resonance relationship, whose resonance angular frequencies are ω 1 and ω 2(ω1＝2πf1,ω2＝2πf2 respectively,The crosstalk of signals to electric energy can be effectively reduced, and the electric energy quality is further improved. Four groups of high-frequency wave-blocking networks (C 1,L1)、(C2,L2)、(C3,L3) and (C 4,L4) are respectively provided with the resonant frequencies of omega 1 and omega 2 Thus, the signal source U s1 at frequency ω 1 cannot respond to the sampling resistor R s2, and the signal source U s2 at frequency ω 2 cannot respond to the sampling resistor R s1. In the magnetic field coupling power transmission mode, the working angular frequency omega is far smaller than the signal transmission angular frequencies omega 1 and omega 2, and the coupling capacitance formed by the metal vehicle-carrying plate 1 and the vehicle-carrying electrode plate 2 is extremely small (pF level), so that the capacitive reactance of the electric field coupling mechanism is extremely large and can be similar to an open circuit. In contrast, in the signal transmission mode, the electric field coupling mechanism serves as a main transmission channel.
The performance of the energy-communication system of the present application is analyzed as follows.
S1.1, analyzing the performance of the power transmission mode system: in the power transfer mode, the electric field coupling mechanism may be considered as an open circuit. Furthermore, since ω 1,ω2 > > ω, then:
Namely, the capacitors of the wave-blocking network can be regarded as open circuits, so that the electric energy transmission circuit can be equivalently represented by an LCC-S structure shown in fig. 4, wherein U ac is an inversion output alternating voltage, R eq is an alternating equivalent load resistor (wherein R eq＝8RL/π2),Lteq is an equivalent inductance of the wave-blocking network at the transmitting end (wherein L teq≈Lt1+Lt2),Lreq is an equivalent inductance (L req≈Lr1+Lr2) of the wave-blocking network at the receiving end), and each parameter of the circuit satisfies the following resonance relation:
from this, the circuit input impedance can be found as:
The transmitting end coil current is:
The further gain of power transfer is:
in practical application, the working frequency, input voltage and coupling coil of the system are given, namely omega, U ac、Lp、Ls and M are known; according to the charging power requirement P req＝(UacGp)2/Req in the application, the expression of the inductance L f1 can be obtained as follows:
From the lc resonance relationship, C f1＝1/ω2Lf1 can be obtained, where the inductances L teq and L req and the capacitances C p and C s are determined by the design of the parameter relationship between the signal transmission mode and the crosstalk mode.
S1, 2, analyzing the performance of the signal transmission mode system:
as can be seen from fig. 3, the signal transmission circuit has a symmetrical structure, so that the analysis methods of the forward transmission mode and the reverse transmission mode are identical, and only the forward transmission mode is analyzed. In the signal forward transmission mode, according to the superposition principle, the signal source U s2 can be regarded as a short circuit; under the action of the signal source U s1 with the frequency of omega 1, (C t1,Lt1),(C1,L1),(Cr1,Lr1),(C3,L3) is all open, so the signal forward transmission circuit topology is shown in fig. 5. The circuit shown in fig. 5 can be equivalent to the circuit shown in fig. 6 by combining the equivalent transformation and decoupling equivalent principle of the coupling coil shown in fig. 2, in which:
Wherein:
Wherein, C π1 and C π2 are the equivalent capacitance of the primary side and the equivalent capacitance of the secondary side in the equivalent pi model respectively, C M is the mutual capacitance between the primary side and the secondary side in the equivalent pi model, and C i,j is the capacitance between any two polar plates in the cross coupling model, wherein: i, j=1, 2,3,4, and i+.j.
The circuit shown in fig. 6 is divided into two loops, I 1 and I 2, respectively, with the currents in the loops being specified to be clockwise as positive. According to kirchhoff's voltage law, the column writes the loop equation:
Wherein:
the loop current can be calculated as:
Thus, the gain model of the signal at forward transmission can then be expressed as:
s1:3, analyzing the performance of the power crosstalk mode system:
Power crosstalk refers to the voltage response across a signal sampling resistor considering only the power input. The power crosstalk gain is used to measure the effect of power transmission on signal transmission, and the smaller the value is, the better the value is. According to the structure shown in fig. 3, the power crosstalk model of the system can be equivalent to the circuit shown in fig. 7, in which:
The crosstalk of electric energy to signals mainly comes from the voltage difference between a transmitting coil and a receiving coil, and the impedance of an LC wave-blocking network in the figure is respectively expressed as:
The circuit shown in fig. 3 is divided into two loops, the loop currents are I c1 and I c2, respectively, and the directions are counterclockwise and clockwise, respectively, and the loop equation is written according to kirchhoff's law column:
Wherein:
The two loop currents can thus be obtained as:
the voltages across the sampling resistors Rs1 and Rs2 are:
S1, 4, analyzing the performance of the signal crosstalk mode system:
For signal forward transmission, mainly consider the crosstalk of the receiving end signal source U s2 on R s1; for signal reverse transmission, mainly consider the crosstalk of the transmitting end signal source U s1 on R s2; the crosstalk model derivation methods of forward and reverse signal transmission are basically consistent according to the symmetry of the circuit. When only U s2 is considered, the signal crosstalk circuit may be equivalent to the structure shown in fig. 8.
In the case of the frequency ω 2, the impedance of the LC choke network in the figure is expressed as:
thus, the impedances of the stages in the graph can be expressed as:
The crosstalk model of U s2 on R s1 can be expressed as:
s2, performing simulation analysis on the system:
Simulation is carried out when the single vehicle to be charged in the stereo garage carries out energy communication transmission, simulation models of a magnetic field coupling module and an electric field coupling module are respectively established based on a Maxwell finite element simulation platform, simulation analysis is carried out, and parameters of related inductance and capacitance are obtained, as shown in table 1.
TABLE 1 electric and magnetic field coupling module parameters
Taking a wireless power transmission system with an operating frequency of 85kHz as an example according to the above parameter design analysis, selecting a primary compensation inductance L f1 =10μh according to experience, and giving the resonant frequencies ω 1 and ω 2 of the parallel LC choke networks as 2pi×3x10 6 and 2pi×2x10 6 respectively, then giving other parameters in each choke network and circuit, as shown in table 2.
Table 2 system parameters
The simulation of the system based on the above parameters is performed, and the simulation results are shown in fig. 9, 10, 11, 12, 13, 14, and 15. The system output power of more than 3.3kW can be calculated from the inverted output waveform and the load waveform when the system is only transmitting power as shown in fig. 9 and 10.
The system shown in fig. 11 has a simulation waveform diagram under signal transmission only, the first waveform is the signal voltage of the transmitting end with the modulation frequency of 100kHz, the second waveform is the signal voltage of the receiving end, the modulation frequency is also 100kHz, and the last two waveforms are the signal waveforms output by the receiving end and the transmitting end respectively.
As can be seen from comparing fig. 11 with the signal waveform diagram of fig. 12 when the system power and the signal are synchronously transmitted, the power has a certain influence on the signal transmission after the power channel is added, but the influence is not obvious, and the latter two waveforms have good correspondence with the former two waveforms, which means that the signal can be better demodulated, because the wave-blocking network and the electric field coupling mechanism designed in the document have an isolating function.
To further illustrate the effect of power on the signal, see the cross-talk waveform of power versus signal transmission shown in fig. 13, it can be seen from fig. 13 that the effect of power on the signal is negligible compared to the amplitude of the signal itself. Fig. 14 and 15 show crosstalk during forward and reverse transmission of signals, respectively, as shown in fig. 14, for a signal transmission process U s1 versus R s2, with the first waveform in fig. 14 being the input of U s1, the output on R s1, and the second waveform being the input of U s1, the crosstalk on R s2; as shown in fig. 15, the signal transmission process U s2 versus R s1 crosstalk diagram, the first waveform in fig. 15 is the crosstalk at R s1 at the input of U s2, and the second waveform is the output at R s2 at the input of U s2; from fig. 14 and 15, it can be seen that the crosstalk between signals is small and negligible. From the above simulation analysis, the method and system provided herein can ensure that the electric energy and the signal realize full duplex synchronous transmission.
In summary, the application provides a full duplex electric energy and signal parallel wireless transmission system based on an electric field and magnetic field hybrid coupling mechanism aiming at the wireless charging application scene of a stereo garage. The two signal carriers are based on OOK modulation and are transmitted synchronously with the power carrier through a single transformer coupling. The circuit parameter design method under four conditions of an electric energy transmission mode, a signal transmission mode, an electric energy crosstalk mode and a signal crosstalk mode is respectively analyzed, and corresponding circuit simulation parameters are provided. A system simulation model is built on MATLAB/Simulink, the transmission performance under various working modes is analyzed while the output power is 3.3kW and the maximum transmission rate is 200kb/s, and the result shows that the proposed system can better realize the full duplex parallel transmission of electric energy and signals and can meet the application scene of wireless charging in a stereo garage.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (10)
1. The electric field-magnetic field hybrid coupling mechanism in the stereo garage comprises a plurality of parking modules which are arranged at equal intervals along the vertical direction, and is characterized in that the parking modules comprise metal car carrying plates (1), and the rear ends of the parking modules are provided with transmitting coils L p;
The bottom and the top of waiting to charge the vehicle all are provided with on-vehicle electrode plate (2), and the rear portion of waiting to charge the vehicle is provided with receiving coil L s, on-vehicle electrode plate (2) all with metal carries sweep (1) parallel arrangement, and two on-vehicle electrode plates (2) of waiting to charge the vehicle constitute two sets of electric field coupling modules with the metal that waits to charge the vehicle and carry sweep (1) and the metal that parks the module above thereof respectively, transmitting coil L p constitutes magnetic field coupling module with receiving coil L s.
2. An energy communication system, comprising the electric field-magnetic field hybrid coupling mechanism in the stereo garage of claim 1.
3. The energy co-transmission system of claim 2, further comprising an energy transfer circuit comprising a power module, a primary power conversion module, a secondary power conversion module, and a load R L;
The input end of the primary side electric energy conversion module is connected with the power supply module, the output end of the primary side electric energy conversion module is communicated with the transmitting coil L p, the input end of the secondary side electric energy conversion module is communicated with the receiving coil L s, and the output end of the secondary side electric energy conversion module is communicated with the load R L.
4. The energy co-transmission system of claim 2, further comprising a signal transmission circuit, wherein the signal transmission circuit comprises a primary side modem module and a secondary side modem module;
The primary side modem module is connected in series with one end of the transmitting coil L p, and the metal vehicle carrying plate (1) for parking the vehicle to be charged and the metal vehicle carrying plate (1) of the parking module above the metal vehicle carrying plate are communicated with the other end of the transmitting coil L p and the primary side modem module through the control switch S i;
The secondary side modem module is connected in series with one end of the receiving coil L s, and the vehicle-mounted electrode plates (2) at the bottom and the top of the vehicle to be charged are communicated with the other end of the receiving coil L s and the secondary side modem module.
5. A power co-transmission system according to claim 3, wherein the primary side power conversion module comprises a high frequency inverter circuit, a primary side LCC compensation circuit and a primary side power high frequency choke network submodule;
The input end of the high-frequency inverter circuit is connected with the power supply module, the input end of the primary side LCC compensation circuit is connected with the output end of the high-frequency inverter circuit, one end of the primary side power high-frequency wave-blocking network sub-module is connected with one end of the primary side LCC compensation circuit, and the other end of the primary side power high-frequency wave-blocking network sub-module is respectively communicated with two ends of the transmitting coil L p with the other end of the primary side LCC compensation circuit.
6. The energy co-transmission system according to claim 5, wherein the secondary side power conversion module comprises a secondary side power compensation capacitor C s, a rectifying circuit and a secondary side power high-frequency choke network submodule;
One end of the receiving coil L s is communicated with one input end of the rectifying circuit, the other end of the receiving coil L s is communicated with one end of the secondary side power high-frequency wave-blocking network submodule, the other end of the secondary side power high-frequency wave-blocking network submodule is communicated with one end of the secondary side power compensation capacitor C s, the other end of the secondary side power compensation capacitor C s is communicated with the other input end of the rectifying circuit, and the output end of the rectifying circuit is communicated with the load R L.
7. The energy co-transmission system according to claim 6, wherein the primary power high-frequency choke network submodule comprises a first primary power high-frequency choke network and a second primary power high-frequency choke network which are connected in series;
The secondary side power high-frequency wave-blocking network submodule comprises a first secondary side power high-frequency wave-blocking network and a second secondary side power high-frequency wave-blocking network which are connected in series.
8. The energy co-transmission system of claim 4, wherein the primary side modem module comprises a primary side signal modulation sub-module and a primary side signal demodulation sub-module;
The primary side signal modulation submodule is connected in parallel with the primary side signal demodulation submodule, the primary side signal modulation submodule comprises a primary side signal modulation circuit U s1 and a first primary side signal high-frequency wave-blocking network which are connected in series, and the primary side signal demodulation submodule comprises a primary side sampling resistor R s1 and a second primary side signal high-frequency wave-blocking network which are connected in series.
9. The energy co-transmission system of claim 8, wherein the secondary side modem module comprises a secondary side signal modulation sub-module and a secondary side signal demodulation sub-module;
The secondary side signal modulation submodule is connected in parallel with the secondary side signal demodulation submodule, the secondary side signal modulation submodule comprises a secondary side signal modulation circuit U s2 and a first secondary side signal high-frequency wave-blocking network which are connected in series, and the secondary side signal demodulation submodule comprises a secondary side sampling resistor R s2 and a second secondary side signal high-frequency wave-blocking network which are connected in series.
10. The energy co-transmission system of claim 9, wherein the primary side signal modulation circuit U s1 and the secondary side signal modulation circuit U s2 each modulate signals using an on-off keying OOK scheme.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410217615.3A CN118238641A (en) | 2024-02-28 | 2024-02-28 | Electric field-magnetic field hybrid coupling mechanism in stereo garage and energy communication and simultaneous transmission system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410217615.3A CN118238641A (en) | 2024-02-28 | 2024-02-28 | Electric field-magnetic field hybrid coupling mechanism in stereo garage and energy communication and simultaneous transmission system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118238641A true CN118238641A (en) | 2024-06-25 |
Family
ID=91558132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410217615.3A Pending CN118238641A (en) | 2024-02-28 | 2024-02-28 | Electric field-magnetic field hybrid coupling mechanism in stereo garage and energy communication and simultaneous transmission system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118238641A (en) |
-
2024
- 2024-02-28 CN CN202410217615.3A patent/CN118238641A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108767956B (en) | Dynamic wireless power transmission system and passive control method thereof | |
| Joseph et al. | A review on renewable energy powered wireless power transmission techniques for light electric vehicle charging applications | |
| CN111987813B (en) | Synchronous full-duplex communication wireless power transmission system based on single-coil coupling mechanism | |
| CN106740238B (en) | Wireless charging circuit of electric automobile and control method thereof | |
| CN112701800B (en) | Shared channel type single-capacitor coupling wireless electric energy and signal parallel transmission system | |
| CN109713804A (en) | Resonance compensation device, charging system and control method thereof | |
| CN109271732B (en) | Modeling method of electric automobile dynamic wireless charging system | |
| Viqar et al. | Modelling, simulation and hardware analysis of misalignment and compensation topologies of wireless power transfer for electric vehicle charging application | |
| Purushothaman et al. | A comprehensive review on single-stage WPT converter topologies and power factor correction methodologies in EV charging | |
| Pantic | Inductive power transfer systems for charging of electric vehicles | |
| Joseph et al. | Design and simulation of wireless power transfer for electric vehicle | |
| CN112737137A (en) | Separated parallel transmission system with energy and signal both being coupled by single capacitor | |
| CN118238641A (en) | Electric field-magnetic field hybrid coupling mechanism in stereo garage and energy communication and simultaneous transmission system thereof | |
| CN111181227A (en) | Magnetic resonance coupling dynamic wireless charging system for electric automobile | |
| Pathmanathan et al. | Efficiency improvement of a wireless power transfer system using a receiver side voltage doubling rectifier | |
| CN109190288A (en) | Resonator analogue system and emulation mode based on the transmission of resonance type wireless electric energy | |
| CN210234681U (en) | Double-frequency induction wireless charging foreign matter detection circuit | |
| Samanta et al. | Bidirectional wireless power transfer topology using current-fed half bridge CLC transmitter LC receiver configuration for medium power applications | |
| Mo et al. | Research on simultaneous wireless power and data transfer system based on ask modulation | |
| Barsari et al. | Push-pull driven low-cost coupler array for dynamic ipt systems | |
| CN106374633A (en) | Voltage doubling circuit-based wireless power transmission system | |
| Rajalakshmi et al. | Comparison of Wireless Charging Compensation Topologies of Electric Vehicle | |
| Mohamed et al. | Sizing of a Dynamic Wireless Power Transfer System for Electric Vehicles in Highway | |
| Jakubiak et al. | Modelling of inductive wireless charging for electric vehicles | |
| Loganathan et al. | Design of Inductive Resonance Coupling-based Wireless Charging Infrastructure for Electric Vehicles |
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 |