CN109728654A - Three-winding structure wireless electric energy Transmission system - Google Patents
Three-winding structure wireless electric energy Transmission system Download PDFInfo
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- CN109728654A CN109728654A CN201811143996.6A CN201811143996A CN109728654A CN 109728654 A CN109728654 A CN 109728654A CN 201811143996 A CN201811143996 A CN 201811143996A CN 109728654 A CN109728654 A CN 109728654A
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Abstract
The present invention provides a kind of three-winding structure wireless electric energy Transmission systems, including electric energy transmission device, electric energy reception device and load, the electric energy transmission device includes DC power supply, inverter circuit, transmitting terminal LC resonance circuit and intermediate LC resonance circuit, the input terminal of the output end connection inverter circuit of DC power supply, the output end of inverter circuit connects transmitting terminal LC resonance circuit, the electric energy reception device includes receiving end LC resonance circuit, rectification circuit and filter circuit, electric energy transmitting coil is between source coil and electric energy receiving coil, source coil intercouples with electric energy transmitting coil, electric energy transmitting coil intercouples with electric energy receiving coil, the input terminal of the output end connection rectification circuit of receiving end LC resonance circuit, the input terminal of the output end connection filter circuit of rectification circuit, the output of filter circuit End connection load.The present invention can effectively improve the efficiency of radio energy transmission system.
Description
Technical field
The present invention relates to wireless power transmission technical field more particularly to a kind of three-winding structure wireless electric energy transmission systems
System.
Background technique
With the development of electric car and consumer electronics product, how easily and efficiently to be charged to product more next
More become a urgent problem needed to be solved.Traditional charging modes need wire connecting power and electrical appliance, have easy to wear, easy
The disadvantages of generating electric spark；Wireless power transmission (WPT) technology because its without charging cable, conveniently, convenient advantage due to obtain more
Carry out more concerns.The technology all has pole in multiple fields such as portable electronic device, electric car, implantable medical devices
Big application prospect.
Currently, magnetic coupling resonance formula wireless power transmission technology is considered as most effective and most development potentiality WPT
Technology, which utilizes two or more electromagnetic systems with identical resonance frequency, humorous by the LC for working in specific frequency
The circuit that shakes generates EMR electromagnetic resonance, and high-frequency electrical energy is wirelessly transmitted to receiving end, received end rectification from system transmitting terminal
Device is supplied to load and uses after being rectified.
Traditional magnetic coupling resonance formula radio energy transmission system uses two coil configuration, and system transmitting terminal and receiving end are each
There is a coupling coil, electric energy transmission is carried out by high frequency magnetic field.When the relative position not lucky face of coupling coil, two-wire
Loop knot construction system can generate current stress and magnetic field radiation, cause the reduction of system efficiency of transmission, limit its further application.
Summary of the invention
The purpose of the present invention is to provide a kind of three-winding structure wireless electric energy Transmission systems, it is intended to existing for solving
The problems such as coupling coil relative position flexibility of two coil configuration radio energy transmission system is poor, energy loss is larger.
The present invention is implemented as follows:
The present invention provide a kind of three-winding structure wireless electric energy Transmission system, including electric energy transmission device, electric energy reception device with
And load, the electric energy transmission device include DC power supply, inverter circuit, transmitting terminal LC resonance circuit and intermediate LC resonance electricity
Road, the output end of the DC power supply connect the input terminal of the inverter circuit, described in the output end connection of the inverter circuit
Transmitting terminal LC resonance circuit, the transmitting terminal LC resonance circuit include source coil and first capacitor, the intermediate LC resonance electricity
Road includes electric energy transmitting coil and the second capacitor, and the electric energy reception device includes receiving end LC resonance circuit, rectification circuit
And filter circuit, the receiving end LC resonance circuit include electric energy receiving coil and third capacitor, the electric energy emission lines
Between the source coil and the electric energy receiving coil, the source coil intercouples circle with the electric energy transmitting coil,
The electric energy transmitting coil intercouples with the electric energy receiving coil, and the output end of the receiving end LC resonance circuit connects institute
The input terminal of rectification circuit is stated, the output end of the rectification circuit connects the input terminal of the filter circuit, the filter circuit
Output end connect the load.
Further, the inverter circuit is the H-bridge inverter circuit constituted using power MOSFET.
Further, the source coil and the electric energy transmitting coil are close coupling, the electric energy transmitting coil with it is described
Electric energy receiving coil is weak coupling.
Further, the source coil is opposite with the center of the electric energy transmitting coil.
Further, the source coil, the electric energy transmitting coil and the electric energy receiving coil be all made of Litz line around
System.
Further, the diameter of the source coil is less than the diameter of the electric energy transmitting coil, the electric energy transmitting coil
It is identical with the diameter of the electric energy receiving coil.
Further, the rectification circuit is the full bridge rectifier constituted using Xiao Jite diode.
Further, second capacitor and the third capacitor use identical capacitor.
Further, the load is capacitive load, inductive load or pure resistor load.
Compared with prior art, the invention has the following advantages:
This three-winding structure wireless electric energy Transmission system provided by the invention, source coil are not take up transmitting coil and receiving coil
Between space, and source impedance because source coil there are due to become smaller, can effectively improve the effect of radio energy transmission system
Rate.Compared with traditional two coil configuration, the radio energy transmission system of three-winding structure, which has, can be improved system maximum effect
Load change intensity near rate point effectively prevent current stress and electromagnetic radiation because of caused by coil misalignment, effectively drops
Caused by the low deviation because of load resistance the advantages that energy loss.
Detailed description of the invention
Fig. 1 is a kind of overall structure signal of three-winding structure wireless electric energy Transmission system provided in an embodiment of the present invention
Figure；
Fig. 2 is the structural model figure of power transfer provided in an embodiment of the present invention；
Fig. 3 is a kind of equivalent circuit schematic of three-winding structure wireless electric energy Transmission system provided in an embodiment of the present invention.
Description of symbols: 1- DC power supply, 2- inverter circuit, 3- transmitting terminal LC resonance circuit, 31- source coil, 32-
LC resonance circuit, 41- transmitting coil, the second capacitor of 42-, the receiving end 5- LC resonance circuit, 51- receive line among one capacitor, 4-
Circle, 52- third capacitor, 6- rectification circuit, 7- filter circuit, 8- load.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, the embodiment of the present invention provides a kind of three-winding structure wireless electric energy Transmission system, including electric energy transmitting
Device, electric energy reception device and load 8, the electric energy transmission device include DC power supply 1, inverter circuit 2, transmitting terminal LC humorous
Shake circuit 3 and centre LC resonance circuit 4, and the DC power supply 1 is used to provide electric energy needed for system, the DC power supply 1
Output end connects the input terminal of the inverter circuit 2, and the inverter circuit 2 is for the voltage that DC power supply 1 exports to be changed into
The output end of alternating voltage, the inverter circuit 2 connects the transmitting terminal LC resonance circuit 3, the transmitting terminal LC resonance circuit 3
Including source coil 31 and first capacitor 32, for the transmitting terminal LC resonance circuit 3 for generating high frequency magnetic field, the intermediate LC is humorous
Vibration circuit 4 is located at 3 side of transmitting terminal LC resonance circuit, the intermediate LC resonance circuit 4 including electric energy transmitting coil 41 with
And second capacitor 42.The electric energy reception device includes receiving end LC resonance circuit 5, rectification circuit 6 and filter circuit 7, institute
It states receiving end LC resonance circuit 5 and the transmitting terminal LC resonance circuit 3 is located at opposite the two of the intermediate LC resonance circuit 4
Side, the receiving end LC resonance circuit 5 include electric energy receiving coil 51 and third capacitor 52, the receiving end LC resonance circuit
The high frequency magnetic field received for resonating with the transmitting terminal LC resonance circuit 3, is changed into high-frequency current by 5.It is described to connect
The output end of receiving end LC resonance circuit 5 connects the input terminal of the rectification circuit 6, what the rectification circuit 6 was used to receive
High-frequency current is rectified into the direct current containing alternating component, and the output end of the rectification circuit 6 connects the defeated of the filter circuit 7
Enter end, the output end connection load 8 of the filter circuit 7, the filter circuit 7 be used for except the exchange in removing DC at
Point, electric energy is provided and is used to load 8.
As shown in Fig. 2, the source coil 31, the electric energy transmitting coil 41 and the common structure of the electric energy receiving coil 51
At power transfer, the electric energy transmitting coil 41 is between the source coil 31 and the electric energy receiving coil 51, institute
It states source coil 31 to intercouple with the electric energy transmitting coil 41, the electric energy transmitting coil 41 and the electric energy receiving coil 51
It intercouples.The distance between coil and coil are adjustable, the distance between source coil 31 and electric energy transmitting coil 41d 01It can
To be adjusted according to the matched needs of system transmitting terminal source impedance, between electric energy transmitting coil 41 and electric energy receiving coil 51
Distanced 12It can be adjusted according to the needs of distance between load and power supply.In order to guarantee that system is imitated with maximum transmission
The coupled modes of rate, two groups of coils are different, and the source coil 31 is close coupling with the electric energy transmitting coil 41, the electric energy hair
Ray circle 41 and the electric energy receiving coil 51 are weak coupling.The placement location of three coils is more flexible, source coil 31 and electricity
The center of energy transmitting coil 41 is opposite, and the relative position of electric energy transmitting coil 41 and electric energy receiving coil 51 can partially
Difference.
In the present embodiment, the source coil 31, the electric energy transmitting coil 41 and the electric energy receiving coil 51 are all made of
Litz line coiling.The diameter of the source coil 31 is less than the diameter of the electric energy transmitting coil 41, the electric energy transmitting coil 41
It is identical with the diameter of the electric energy receiving coil 51.
In the present embodiment, receiving end LC resonance circuit and intermediate LC resonance circuit select identical capacitor and inductor, i.e., described
Electric energy transmitting coil 41 and the electric energy receiving coil 51 use identical loop construction, second capacitor 42 with it is described
Third capacitor 52 uses identical capacitor.
As the preferred of the present embodiment, the inverter circuit 2 is the H-bridge inverter circuit 2 constituted using power MOSFET, will
DC power supply 1 is changed into AC power source, and by transmitting terminal LC resonance circuit 3 series resonance occurs for the alternating voltage generated, from
And generate high frequency magnetic field.The rectification circuit 6 is the full bridge rectifier 6 constituted using Xiao Jite diode.
In the system, it is pure in the present embodiment that the load 8, which can be capacitive load, inductive load or pure resistor load,
Ohmic load.
A kind of working principle of three-winding structure wireless electric energy Transmission system of the embodiment of the present invention is as follows:
As shown in figure 3, gate drive circuit IR2110 drives by 4 power MOSFET(Q1, Q2, Q3, Q4 after powering on) structure
At H-bridge inverter circuit, direct current is changed into alternating current, the frequency and amplitude of alternating current can be adjusted, to prevent function
Rate MOSFET is burnt because electric current is excessive, in circuit design, is increased diode (D1, D2, D3, D4) and is drained.Inversion
The alternating current of circuit output generates high frequency magnetic field by the transmitting terminal LC resonance circuit that L1 and C1 is constituted, and high frequency magnetic field passes through source line
Circle L1 is transmitted to electric energy transmitting coil L2, and intermediate LC resonance circuit (being made of L2, C2) is caused to generate alternating magnetic field, alternating magnetic field
So that receiving end LC resonance circuit (being made of L3, C3) is resonated, receiving end is transmitted to by transmitting terminal to realize electric energy.
The electric energy that electric energy receiving coil receives is rectified by rectification circuit, and rectification circuit is by diode (D5, D6, D7, D8) structure
At alternating current being changed into direct current, the direct current after rectification (is mainly made of capacitor, such as C4, C5) using filter circuit
Load is supplied to after being filtered to use.
The process of this three-winding structure wireless electric energy Transmission system electric energy transmitting provided in an embodiment of the present invention is as follows: straight
The direct current of galvanic electricity source output exports alternating current after inverter circuit carries out inversion, and alternating current is produced by transmitting terminal resonator system
Raw high frequency magnetic field, high frequency magnetic field are transmitted by power transfer, induce high-frequency electrical after being received by electric energy reception device
Stream, high-frequency alternating current are transmitted to load after rectifier circuit rectifies are direct current.
The present invention is based on magnetic coupling resonance formula wireless power transmission technologies, propose a kind of novel three-winding structure wireless electric energy biography
Defeated system, compared to traditional dual coil system structure, three-winding structure, which has, reduces the significant excellent of each coil current stress
Point, electromagnetic field emissions caused by can inhibiting because of coil misalignment, with coil placement location near flexible, pressure point of maximum efficiency
Load change intensity it is big, the advantages that current stress and electromagnetic radiation because of caused by coil misalignment can be effectively prevent.Three
Loop construction had not only met the requirement of system efficiency of transmission, but also made the usage scenario expanded of system, had very big answer
Use prospect.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of three-winding structure wireless electric energy Transmission system, including electric energy transmission device, electric energy reception device and load,
Be characterized in that: the electric energy transmission device includes DC power supply, inverter circuit, transmitting terminal LC resonance circuit and intermediate LC resonance
Circuit, the output end of the DC power supply connect the input terminal of the inverter circuit, and the output end of the inverter circuit connects institute
Transmitting terminal LC resonance circuit is stated, the transmitting terminal LC resonance circuit includes source coil and first capacitor, the intermediate LC resonance
Circuit includes electric energy transmitting coil and the second capacitor, and the electric energy reception device includes receiving end LC resonance circuit, rectified current
Road and filter circuit, the receiving end LC resonance circuit include electric energy receiving coil and third capacitor, the electric energy transmitting
Coil is between the source coil and the electric energy receiving coil, the source coil and the electric energy transmitting coil phase mutual coupling
It closes, the electric energy transmitting coil intercouples with the electric energy receiving coil, and the output end of the receiving end LC resonance circuit connects
The input terminal of the rectification circuit is connect, the output end of the rectification circuit connects the input terminal of the filter circuit, the filtering
The output end of circuit connects the load.
2. three-winding structure wireless electric energy Transmission system as described in claim 1, it is characterised in that: the inverter circuit is to adopt
The H-bridge inverter circuit constituted with power MOSFET.
3. three-winding structure wireless electric energy Transmission system as described in claim 1, it is characterised in that: the source coil with it is described
Electric energy transmitting coil is close coupling, and the electric energy transmitting coil and the electric energy receiving coil are weak coupling.
4. three-winding structure wireless electric energy Transmission system as described in claim 1, it is characterised in that: the source coil with it is described
The center of electric energy transmitting coil is opposite.
5. three-winding structure wireless electric energy Transmission system as described in claim 1, it is characterised in that: the source coil, described
Electric energy transmitting coil and the electric energy receiving coil are all made of Litz line coiling.
6. three-winding structure wireless electric energy Transmission system as described in claim 1, it is characterised in that: the diameter of the source coil
Less than the diameter of the electric energy transmitting coil, the electric energy transmitting coil is identical with the diameter of the electric energy receiving coil.
7. three-winding structure wireless electric energy Transmission system as described in claim 1, it is characterised in that: the rectification circuit is to adopt
The full bridge rectifier constituted with Xiao Jite diode.
8. three-winding structure wireless electric energy Transmission system as described in claim 1, it is characterised in that: second capacitor and institute
Third capacitor is stated using identical capacitor.
9. three-winding structure wireless electric energy Transmission system as described in claim 1, it is characterised in that: the load is negative for capacitive
Load, inductive load or pure resistor load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811143996.6A CN109728654A (en) | 2018-09-29 | 2018-09-29 | Three-winding structure wireless electric energy Transmission system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811143996.6A CN109728654A (en) | 2018-09-29 | 2018-09-29 | Three-winding structure wireless electric energy Transmission system |
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| CN109728654A true CN109728654A (en) | 2019-05-07 |
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| CN201811143996.6A Pending CN109728654A (en) | 2018-09-29 | 2018-09-29 | Three-winding structure wireless electric energy Transmission system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111816425A (en) * | 2020-06-02 | 2020-10-23 | 上海电机学院 | Wireless power transmission coil with asymmetric three-rectangular structure and application thereof |
| CN112564295A (en) * | 2019-09-25 | 2021-03-26 | 华为技术有限公司 | Wireless charging system |
| CN112615440A (en) * | 2020-12-25 | 2021-04-06 | 国网北京市电力公司 | Wireless power transmission device and wireless power transmission system |
| CN114094718A (en) * | 2021-11-18 | 2022-02-25 | 上海卡珀林智能科技有限公司 | Time-sharing multiplexing wireless energy transmission system |
| CN114301189A (en) * | 2021-12-30 | 2022-04-08 | 河北工业大学 | Wireless receiving coil circuit that charges |
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| CN202210700U (en) * | 2011-05-08 | 2012-05-02 | 彭卫东 | Wireless charger of electric automobile |
| CN103928961A (en) * | 2014-04-16 | 2014-07-16 | 国家电网公司 | Electric vehicle wireless charging system |
| CN104993614A (en) * | 2015-07-02 | 2015-10-21 | 中国矿业大学(北京) | Asymmetric wireless power transmission system with relay coil inserted therein, and method |
| CN105958664A (en) * | 2016-05-30 | 2016-09-21 | 东南大学 | Power efficiency optimization method for wireless electric energy transmission system based on maximum power matching |
| CN205901326U (en) * | 2016-08-09 | 2017-01-18 | 华南理工大学 | Be applied to wireless mouse's wireless power transmission device |
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2018
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202210700U (en) * | 2011-05-08 | 2012-05-02 | 彭卫东 | Wireless charger of electric automobile |
| CN103928961A (en) * | 2014-04-16 | 2014-07-16 | 国家电网公司 | Electric vehicle wireless charging system |
| CN104993614A (en) * | 2015-07-02 | 2015-10-21 | 中国矿业大学(北京) | Asymmetric wireless power transmission system with relay coil inserted therein, and method |
| CN105958664A (en) * | 2016-05-30 | 2016-09-21 | 东南大学 | Power efficiency optimization method for wireless electric energy transmission system based on maximum power matching |
| CN205901326U (en) * | 2016-08-09 | 2017-01-18 | 华南理工大学 | Be applied to wireless mouse's wireless power transmission device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564295A (en) * | 2019-09-25 | 2021-03-26 | 华为技术有限公司 | Wireless charging system |
| CN111816425A (en) * | 2020-06-02 | 2020-10-23 | 上海电机学院 | Wireless power transmission coil with asymmetric three-rectangular structure and application thereof |
| CN112615440A (en) * | 2020-12-25 | 2021-04-06 | 国网北京市电力公司 | Wireless power transmission device and wireless power transmission system |
| CN114094718A (en) * | 2021-11-18 | 2022-02-25 | 上海卡珀林智能科技有限公司 | Time-sharing multiplexing wireless energy transmission system |
| CN114301189A (en) * | 2021-12-30 | 2022-04-08 | 河北工业大学 | Wireless receiving coil circuit that charges |
| CN114301189B (en) * | 2021-12-30 | 2023-08-11 | 河北工业大学 | Wireless receiving coil circuit that charges |
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Application publication date: 20190507 |
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