CN109728655A - Variable topological structure magnetic coupling resonant radio energy Transmission system and method - Google Patents
Variable topological structure magnetic coupling resonant radio energy Transmission system and method Download PDFInfo
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Abstract
The invention discloses variable topological structure magnetic coupling resonant radio energy Transmission system a kind of in magnetic coupling resonant radio energy transmission technique field and methods, the main decline for solving the problems, such as the phenomenon that due to loadtype and topological structure Incomplete matching and leading to transimission power, the method that this method improves the power of system by changing magnetic coupling resonant radio energy Transmission system topological structure, load obtains optimal transimission power, so that the transmission performance that system is optimal.The present invention lays a good foundation for depth study of wireless electric energy transmission technology, provides useful guidance for Transmission system when designing different loads.
Description
Technical field
The invention belongs to magnetic coupling resonant radio energy transmission technique fields, are related to a kind of variable topological structure magnetic coupling resonance
Radio energy transmission system more particularly to a kind of topological structure by changing transmitting end module and reception end module pass to improve
The method of defeated power.
Background technique
As soon as after proposing that wireless power transmission is theoretical before century from Ni Gula tesla, wireless power transmission
It always is the hot spot of research.Domestic and international expert is carrying out always the research of wireless power transmission for many years, but all the time
Development of scientific research is slow, and until in June, 2007, the Massachusetts Institute of Technology's (MIT) physics teaches Marin Soljacic and its small composition
Member proposes a kind of brand-new scheme based on strong magnetic coupling magnetic resonance, and it is 60cm, by copper wire winding that two diameters are used in experiment
Coil, and the natural resonance frequency of coil is made to be in 9.9MHz, one has successfully been lighted from power supply using magnetic coupling resonance principle
The 60W bulb of about 2m, this later technology are referred to as WiTricity, so far, open the research of wireless power transmission technology
Grand occasion.In order to make wireless power transmission technology be applied as early as possible, on September 1st, 2010, the first promotion wireless charging technology in the whole world
Standardization body -- wireless charging alliance (Wireless Power Consortium, WPC) announces in Beijing by Qi wireless charging
Electric international standard takes the lead in introducing China, and the tissue is also added in the compatible quality surveillance center of Ministry of Information Industry's communication electromagnetism, wherein deep
Zhen Sangfei consumer communications Co., Ltd is unique Jia Zhong state-owned enterprise in the supporter and alliance executive director member of Qi standard
Industry.
There are three types of modes for the realization of wireless power transmission both at home and abroad at present:
1. induction --- it is similar to loosely coupled transformer, electricity is generated by the electromagnetic induction of primary and secondary coil
Stream is suitble to the higher short range transmission of efficiency so that energy is transported to receiving end from transmitting terminal.
2. electromagnetic radiation formula --- its basic principle is similar to the crystal receiver of early application, has relative maturity at present
Theory, sphere of action is wide, delivering power is big, but is affected to biotic environment and inefficiency.
3. magnetic coupling resonance formula --- the completely new side that Massachusetts Institute of Technology Marin Soljacic and its group member propose
Case, principle are to transmit energy using the non-radiating near-field coupling in magnetic field, largely reduce the injury to human body,
The distance of wireless power transmission is extended, it is that future radios can transmit hair that this mode efficiency of transmission is high, distance is remote, power is big
The main flow direction of exhibition.
Magnetic coupling resonant radio energy Transmission system is to be sent out by transmitting coil and receiving coil with identical resonance frequency
Raw resonance, so that energy is only transmitted between two resonant objects, and there have seldom energy loss not occur at other to be humorous
On the object of vibration, effective transmission of energy is realized by intercoupling for magnetic field.
Magnetic coupling resonant radio energy Transmission system is divided into four kinds of topological structures due to the connection type of inductance and capacitor:
Series connection-cascaded structure, serial-parallel structure, multiple-series structure, parallel connection-parallel-connection structure.These four topological structures are ok
With the transmission performance that the change of distance is optimal system, to load the transmission for obtaining optimal power.But in system
When operation, when loadtype and topological structure Incomplete matching, the output power of system be will be greatly reduced, and reason is mainly
Due to load in capacitive or inductive part cause the frequency detuning of system to lead to the decline of transimission power.
In conclusion due to loadtype and topological structure Incomplete matching in magnetic coupling resonant radio energy Transmission system
The case where and cause the decline problem of transimission power very important.Since receiving end needs to meet wanting for flexibility and convenience
It asks, the method for carrying out load matched to load is obviously complicated in practical applications and has difficulties.For this purpose, we must find one
Relatively simple method is planted to optimize Transmission system --- when load shows different characteristics, optimal biography can be obtained
Defeated power.
Summary of the invention
Technical problem: it is an object of the invention to be directed to magnetic coupling resonant radio energy Transmission system, when loadtype with
When topological structure Incomplete matching, due to load perception or capacitive part and the case where cause the frequency detuning of system, propose
A kind of variable topological structure magnetic coupling resonant radio energy Transmission system and method.This method is subject to load according to load characteristic
It distinguishes, by changing the topological structure of transmitting coil or receiving coil, load obtains optimal transimission power, so that system reaches
Optimal transmission performance.
To realize above-mentioned target, the invention adopts the following technical scheme:
A kind of variable topological structure magnetic coupling resonant radio energy Transmission system of the present invention, including a transmitting end module
With a reception end module.
The transmitting end module includes: HF signal generator, the first topological transformation network and transmitting coil, the transmitting
Coil is connected to the network by the first topological transformation to HF signal generator, and the HF signal generator is for exporting specified function
The high-frequency signal of rate.
The first topological transformation network includes first capacitor, the second capacitor, first switch and the second switch, and described first
Switch is in parallel with first capacitor, and the second switch is connected with the second capacitor.
The reception end module includes receiving coil, the second topological transformation network, load characteristic detector and load equipment,
The receiving coil is successively connected directly via the second topological transformation network and load characteristic detector with AC load, or is passed through
One rectification circuit is connected with DC load；The rectification circuit includes halfwave rectifier, full-wave rectification and bridge rectifier.
The second topological transformation network includes third capacitor, the 4th capacitor, third switch and the 4th switch, the third
Switch is in parallel with third capacitor, and the 4th switch is connected with the 4th capacitor.
The load characteristic detector detects load equipment, and output end controls the first topological transformation network
It opens and is closed at while first switch, second switch, and the third for controlling the second topological transformation network switchs, the 4th opens
It opens and is closed at while pass.
The load equipment is purely resistive load；Or there is the resistance inductive load of inductive part；Or there is capacitive part
Capacitive load is hindered to constitute.
The transmitting coil and receiving coil are the coil of consistent, identical the number of turns and pitch of turn with winding method, described the
One topological transformation network and the second topological transformation network electrical parameter having the same, the transmitting coil and receiving coil respectively with
First topological transformation network and the second topological transformation network are connected to form resonance circuit, and transmitting end module and reception end module have
Identical resonance frequency.
The transmitting coil receives the high frequency that rated power is exported in high-frequency drive power supply via the first topological transformation network
Signal, the reception end module is equal with transmitting end module natural resonance frequency, and resonance occurs and transmits energy from transmitting coil
To receiving coil, energy is by the receiving coil successively via the second topological transformation network and load characteristic detector by energy
It is supplied to load equipment use.
The present invention also provides a kind of radio using above-mentioned variable topological structure magnetic coupling resonant radio energy Transmission system
Energy transmission method, comprising the following steps:
Step A: system starts, in load characteristic detector real-time detection magnetic coupling resonant radio energy Transmission system
The load characteristic of load equipment, i.e. load equipment are purely resistive loads；Or there is the resistance inductive load of inductive part；Or there is appearance
The resistance capacitive load of property part, and will test result and be output to the first topological transformation network and the second topological transformation network；
Step B: if the load equipment is purely resistive load, first switch in the first topological transformation network and
Second switch simultaneously switches off, then the transmitting coil and the first topological transformation group of networks are opened up at series resonant circuit, described second
The third switch and the 4th switch flutterred in converting network simultaneously switch off, the receiving coil and the second topological transformation group of networks bunchiness
Join resonance circuit, forms series connection-series topology system structure circuit；
Step C: if the load equipment is resistance inductive load, first switch in the first topological transformation network and
Second switch simultaneously switches off, then the transmitting coil and the first topological transformation group of networks are opened up at series resonant circuit, described second
The third switch and the 4th switch flutterred in converting network are closed at, and the receiving coil and the second topological transformation network composition are simultaneously
Join resonance circuit, forms serial-parallel topological system structural circuit；
Step D: if the load equipment is resistance capacitive load, first switch in the first topological transformation network and
Second switch simultaneously switches off, then the transmitting coil and the first topological transformation group of networks are opened up at series resonant circuit, described second
The third switch and the 4th switch flutterred in converting network simultaneously switch off, the receiving coil and the second topological transformation group of networks bunchiness
Join resonance circuit, forms series connection-series topology system structure circuit.
The beneficial effects of the present invention are:
1. variable topological structure magnetic coupling resonant radio energy Transmission system provided by the invention and method utilize the first topology
Converting network and the second topological transformation network change capacitor and inductance in magnetic coupling resonant radio energy Transmission system topological structure
Connection type, load obtains optimal transimission power, so that the transmission performance that system is optimal.
2. compared with the conventional method, the system solves topological structure and load characteristic Incomplete matching causes output work
The problem of rate declines provides certain reference for the problem of can be potentially encountered in wireless power transmission systems practical engineering application
Effect.
Detailed description of the invention
Fig. 1 is the system schematic that variable topological structure magnetic coupling resonant radio of the invention can transmit；
Fig. 2 a is the first topological transformation network in variable topological structure magnetic coupling resonant radio energy Transmission system of the invention
Equivalent circuit diagram；
Fig. 2 b is the second topological transformation network in variable topological structure magnetic coupling resonant radio energy Transmission system of the invention
Equivalent circuit diagram；
Fig. 3 a is that variable topological structure magnetic coupling resonant radio energy Transmission system series connection-cascaded structure of the invention is equivalent
Circuit diagram；
Fig. 3 b is the equivalent of variable topological structure magnetic coupling resonant radio energy Transmission system serial-parallel structure of the invention
Circuit diagram；
Fig. 3 c is the equivalent of variable topological structure magnetic coupling resonant radio energy Transmission system multiple-series structure of the invention
Circuit diagram；
Fig. 3 d is that variable topological structure magnetic coupling resonant radio energy Transmission system parallel connection-parallel-connection structure of the invention is equivalent
Circuit diagram；
Fig. 4 be variable topological structure magnetic coupling resonant radio energy Transmission system of the invention be purely resistive load when form
The transimission power comparison diagram of topological structure and other topological structures；
Fig. 5 is formed when being variable topological structure magnetic coupling resonant radio energy Transmission system resistance inductive load of the invention
The transimission power comparison diagram of topological structure and other topological structures；
Fig. 6 is formed when being variable topological structure magnetic coupling resonant radio energy Transmission system resistance capacitive load of the invention
The transimission power comparison diagram of topological structure and other topological structures；
Specific embodiment
In order to keep content and the advantage of technical solution of the present invention more clear, below in conjunction with attached drawing, to of the invention
Variable topological structure magnetic coupling resonant radio energy Transmission system and method are described in further detail.It is emphasized that
Following the description is only exemplary, the range and its application being not intended to be limiting of the invention.
It should be noted that in the description of the present invention, belonging to " first ", " second " is only used for facilitating and describes different portions
Part, and should not be understood as indicating or implying ordinal relation, relative importance or implicitly indicate the number of indicated technical characteristic
Amount." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one of the features.
Fig. 1 is variable topological structure magnetic coupling resonant radio energy Transmission system schematic diagram of the invention.
As shown in Figure 1, variable topological structure magnetic coupling resonant radio energy Transmission system of the invention includes: high-frequency signal hair
Raw device, the first topological transformation network, transmitting coil, receiving coil, the second topological transformation network, load characteristic detector and load
Equipment.HF signal generator exports the high-frequency signal of rated power, transfers energy to institute by the first topological transformation network
Transmitting coil is stated, the transmitting coil is sent out in the form of non-radiating near-field electromagnetic wave.The receiving coil passes through coil
Between magnetic coupling resonance receive transmitting coil transmission energy, then by the receiving coil via the second topological transformation network with
Load characteristic detector supplies energy to load equipment use.
Fig. 2 a, 2b are the first topological transformation nets in variable topological structure magnetic coupling resonant radio energy Transmission system of the invention
The equivalent circuit diagram of network and the second topological transformation network.S1, S2, S3, S4 are respectively the first of the first topological transformation network
Third switch, the 4th switch of switch, second switch and the second topological transformation network, Cs1, Cs2, Cs3, Cs4 are respectively described
The first capacitor of first topological transformation network, the third capacitor of the second capacitor and the second topological transformation network, the 4th capacitor, it is described
First switch is in parallel with first capacitor, and the second switch is connected with the second capacitor, and the third switch is in parallel with third capacitor,
4th switch is connected with the 4th capacitor, and the first capacitor, the second capacitor, third capacitor and the 4th capacitor are having the same
Electrical parameter.
Fig. 3 a, 3b, 3c, 3d are variable topological structure magnetic coupling resonant radio energy Transmission system series connection-series connection of the invention
Structure, serial-parallel structure, multiple-series structure and parallel connection-parallel-connection structure equivalent circuit diagram.
The load of load equipment in the load characteristic detector real-time detection magnetic coupling resonant radio energy Transmission system
Characteristic, output end are opened and are closed at while controlling the first switch of the first topological transformation network, second switch, the
The third switch of two topological transformation networks, the 4th open and are closed at while switch, the first topological transformation network and transmitting
Coil forms the resonance circuit of transmitting terminal module, and the second topological transformation network and receiving coil composition receive the resonance electricity of end module
Road forms four kinds of different system topologies, i.e. series connection-cascaded structure, serial-parallel structure, multiple-series structure and simultaneously
Connection-parallel-connection structure.
As shown in figure 3, US is external high frequency in variable topological structure magnetic coupling resonant radio energy Transmission system of the invention
Voltage source, RS are voltage source equivalent internal resistance, and L1, L2 are respectively the inductance of transmitting coil and receiving coil, and C1, C2 are respectively first
Topological transformation network and the second topological transformation network according to the transmitting terminal module capacitance of load characteristic and inductance serial or parallel connection and
Receiving end module capacitance, R1, R2 are respectively the resistance of transmitting coil and receiving coil, and M is the mutual inductance between two coils, to be
Working frequency of the resonance frequency omega of system as system, ZW are load impedance.
To the Analysis of Topological Structure of variable topological structure magnetic coupling resonant radio energy Transmission system of the invention, steps are as follows:
1. pair system work is under resonance condition, equation is obtained:
2. the topological structure of pair system is analyzed using Kirchhoff's second law, following equation is obtained:
(1) the KVL equation of series connection-series connection (SS) structure:
(2) the KVL equation of serial-parallel (SP) structure:
(3) the KVL equation of multiple-series (PS) structure:
(4) the KVL equation of (PP) structure in parallel-in parallel:
3. pairs 2 equation calculates, it can from which further follow that each output power is as shown in table 1.
Output power of the 1 three kinds of loadtypes of table under four kinds of topological structures
(note: being purely resistive load as i=1, at this time ZW1=RW1；It is resistance inductive load, at this time Z as i=2W2=RW2+
jωLW2；It is resistance capacitive load as i=3, at this time)
Present embodiment assumes that system parameter it is as follows: the voltage US=12V in external voltage source, voltage source equivalent internal resistance RS=
The inductance L1=L2=4 μ H of 0.02 Ω, transmitting coil and receiving coil, equivalent capacity C1=C2=40nF, transmitting coil and connect
The resistance R1=R2=0.2 Ω of take-up circle, load equivalent resistance RW=10 Ω, load equivalent capacitor CW=60nF, load equivalent
Inductance LW=2 μ H, turn number N=4, radius r=25cm.It is calculated by the inductance and equivalent capacity of transmitting coil and receiving coil
The resonance frequency of system out
Fig. 4 be variable topological structure magnetic coupling resonant radio energy Transmission system of the invention be purely resistive load when form
The transimission power comparison diagram of topological structure and other topological structures；Fig. 5 is that variable topological structure magnetic coupling resonance of the invention is wireless
Electric energy transmission system is the transimission power comparison diagram of the topological structure and other topological structures that form when hindering inductive load；Fig. 6 is
Variable topological structure magnetic coupling resonant radio energy Transmission system of the invention is the topological structure formed when hindering capacitive load and its
The transimission power comparison diagram of his topological structure.
The magnetic coupling resonant radio energy Transmission system controlled according to the output signal of load characteristic detector is opened up
Structure is flutterred compared with other topological structures, no matter powerful transmission can be better achieved in which kind of load.Therefore, in magnetic coupling
It closes resonant radio energy Transmission system and topological transformation network is added with important practical significance.
Variable topological structure magnetic coupling resonant radio energy Transmission system method of the present invention, comprising the following steps:
Step A: system starts, in load characteristic detector real-time detection magnetic coupling resonant radio energy Transmission system
The load characteristic of load equipment, i.e. load equipment are purely resistive loads；Or there is the resistance inductive load of inductive part；Or there is appearance
The resistance capacitive load of property part, and will test result and be output to the first topological transformation network and the second topological transformation network；
Step B: if the load equipment is purely resistive load, first switch in the first topological transformation network and
Second switch simultaneously switches off, then the transmitting coil and the first topological transformation group of networks are opened up at series resonant circuit, described second
The third switch and the 4th switch flutterred in converting network simultaneously switch off, the receiving coil and the second topological transformation group of networks bunchiness
Join resonance circuit, forms series connection-series topology system structure circuit；
Step C: if the load equipment is resistance inductive load, first switch in the first topological transformation network and
Second switch simultaneously switches off, then the transmitting coil and the first topological transformation group of networks are opened up at series resonant circuit, described second
The third switch and the 4th switch flutterred in converting network are closed at, and the receiving coil and the second topological transformation network composition are simultaneously
Join resonance circuit, forms serial-parallel topological system structural circuit；
Step D: if the load equipment is resistance capacitive load, first switch in the first topological transformation network and
Second switch simultaneously switches off, then the transmitting coil and the first topological transformation group of networks are opened up at series resonant circuit, described second
The third switch and the 4th switch flutterred in converting network simultaneously switch off, the receiving coil and the second topological transformation group of networks bunchiness
Join resonance circuit, forms series connection-series topology system structure circuit.
The foregoing is merely the preferable embodiments of the present invention, but scope of protection of the present invention is not limited thereto, in every case
In the technical scope disclosed by the present invention, made equivalent modification or transformation should all be covered those skilled in the art
Within protection scope of the present invention.
Claims (11)
1. a kind of variable topological structure magnetic coupling resonant radio energy Transmission system, which is characterized in that the electric energy transmission system packet
Include a transmitting end module and a reception end module；
The transmitting end module includes: HF signal generator, the first topological transformation network and transmitting coil, the transmitting coil
By the first topological transformation network connection to HF signal generator, the HF signal generator is for exporting rated power
High-frequency signal；
The reception end module includes: receiving coil, the second topological transformation network, load characteristic detector and load equipment, institute
Receiving coil is stated successively to be connected via the second topological transformation network and load characteristic detector with load equipment.
2. a kind of variable topological structure magnetic coupling resonant radio energy Transmission system according to claim 1, which is characterized in that institute
Stating the first topological transformation network includes first capacitor, the second capacitor, first switch and the second switch, the first switch and first
Capacitor is in parallel, and the second switch is connected with the second capacitor, and the first capacitor is in parallel with the second capacitor.
3. a kind of variable topological structure magnetic coupling resonant radio energy Transmission system according to claim 1, which is characterized in that institute
The second topological transformation network is stated to be connected directly with AC load.
4. a kind of variable topological structure magnetic coupling resonant radio energy Transmission system according to claim 1, which is characterized in that institute
The second topological transformation network is stated to be connected by a rectification circuit with DC load；The rectification circuit includes halfwave rectifier, complete
Wave rectification and bridge rectifier.
5. a kind of variable topological structure magnetic coupling resonant radio energy Transmission system according to claim 2, which is characterized in that institute
Stating the second topological transformation network includes third capacitor, the 4th capacitor, third switch and the 4th switch, and the third switchs and third
Capacitor is in parallel, and the 4th switch is connected with the 4th capacitor, and the third capacitor is in parallel with the 4th capacitor.
6. a kind of variable topological structure magnetic coupling resonant radio energy Transmission system according to claim 1, which is characterized in that institute
Stating load equipment is purely resistive load；Or there is the resistance inductive load of inductive part；Or there is the resistance capacitive load of capacitive part.
7. a kind of variable topological structure magnetic coupling resonant radio energy Transmission system according to claim 5, which is characterized in that institute
State load characteristic detector output end control it is open-minded while the first switch of the first topological transformation network, second switch
It opens and is closed at while being closed at, and control the third switch of the second topological transformation network, the 4th switch.
8. a kind of variable topological structure magnetic coupling resonant radio energy Transmission system according to claim 1, which is characterized in that institute
State coil of the transmitting coil with receiving coil for consistent, identical the number of turns and pitch of turn with winding method, first topological transformation
Network and the second topological transformation network electrical parameter having the same；The transmitting coil is connected with the first topological transformation network；Institute
Receiving coil is stated to be connected with the second topological transformation network.
9. a kind of variable topological structure magnetic coupling resonant radio energy Transmission system according to claim 8, which is characterized in that institute
It states transmitting coil and receiving coil and is connected to form resonance circuit with the first topological transformation network and the second topological transformation network respectively,
Emit end module and receives end module resonance frequency having the same.
10. a kind of variable topological structure magnetic coupling resonant radio energy Transmission system according to claim 8, which is characterized in that
The transmitting coil receives the high-frequency signal that rated power is exported in high-frequency drive power supply via the first topological transformation network, described
It is equal with transmitting end module natural resonance frequency to receive end module, resonance occurs by energy and is transferred to reception line from transmitting coil
Circle, energy are successively supplied energy to via the second topological transformation network and load characteristic detector to negative by the receiving coil
Equipment is carried to use.
11. a kind of wireless power transmission method using the electric energy transmission system as described in claim any one of 1-10, feature
It is, comprising the following steps:
Step A: system starts load in load characteristic detector real-time detection magnetic coupling resonant radio energy Transmission system
The load characteristic of equipment, i.e. load equipment are purely resistive loads；Or there is the resistance inductive load of inductive part；Or there is capacitive portion
The resistance capacitive load divided, and will test result and be output to the first topological transformation network and the second topological transformation network；
Step B: the first switch and the second if load equipment is purely resistive load, in the first topological transformation network
Switch simultaneously switches off, then at series resonant circuit, second topology becomes for the transmitting coil and the first topological transformation group of networks
Third switch and the 4th switch in switching network simultaneously switch off, and the receiving coil is humorous at connecting with the second topological transformation group of networks
Shake circuit, forms series connection-series topology system structure circuit；
Step C: if the load equipment is resistance inductive load, the first switch and second in the first topological transformation network
Switch simultaneously switches off, then at series resonant circuit, second topology becomes for the transmitting coil and the first topological transformation group of networks
Third switch and the 4th switch in switching network are closed at, and the receiving coil and the second topological transformation network composition are in parallel humorous
Shake circuit, forms serial-parallel topological system structural circuit；
Step D: if the load equipment is resistance capacitive load, the first switch and second in the first topological transformation network
Switch simultaneously switches off, then at series resonant circuit, second topology becomes for the transmitting coil and the first topological transformation group of networks
Third switch and the 4th switch in switching network simultaneously switch off, and the receiving coil is humorous at connecting with the second topological transformation group of networks
Shake circuit, forms series connection-series topology system structure circuit.
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| CN114954047A (en) * | 2022-06-28 | 2022-08-30 | 深圳市宝尔爱迪科技有限公司 | System capable of enabling electric automobile to run and charge simultaneously |
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| CN105429313A (en) * | 2015-12-11 | 2016-03-23 | 中国矿业大学 | Wireless electric energy transmission system with switchable resonance compensation topology and control method thereof |
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| CN114954047A (en) * | 2022-06-28 | 2022-08-30 | 深圳市宝尔爱迪科技有限公司 | System capable of enabling electric automobile to run and charge simultaneously |
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