CN106787240B - Multiplexing type LCL structure based on array coil type wireless energy transmission and working method of structure - Google Patents
Multiplexing type LCL structure based on array coil type wireless energy transmission and working method of structure Download PDFInfo
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Abstract
Multiplexing type LCL structure based on array coil formula wireless energy transmission belongs to wireless energy transmission technical field. The problem of current LCL compensation network be equipped with the cost of manufacture high, compensation inductance value is difficult to follow the poor expansibility of adjusting device is solved. The power supply input end of a high-frequency excitation unit is connected with a power supply bus, one path of output end of the high-frequency excitation unit is simultaneously connected with one end of a first power switch and one end of a first array coil, and the other end of the first array coil is simultaneously connected with one end of a compensation capacitor and one end of a second array coil; and the other output end of the high-frequency excitation unit is simultaneously connected with one end of the second power switch and the other end of the second array coil, and the other end of the first power switch and the other end of the second power switch are both connected with the other end of the compensation capacitor. The invention is applied to the field of wireless energy transmission.
Description
Technical field
The present invention relates to wireless energy transmission technologies.
Background technique
With the protrusion of environmental problem and Pressure on Energy, the popularization of electric car receives the favor of countries in the world.It is electronic
Automobile wireless charging technique, which compares traditional plug-in charging technique, better safety and flexibility, and application prospect is very wide
It is wealthy.Wherein, dynamic radio charging technique can effectively promote the course continuation mileage of electric car, and reduce battery pack number, both drop
The low cost of electric car, and its service life is extended, so that electric energy supply is more safe and reliable.Applied to dynamic radio
The array coil structure of power supply, main advantage have: the coupling mechanism of small size effectively reduces energization loss, while also limiting
Leakage field is higher in the safety for the magnetic radiation for improving efficiency of transmission.The relatively small inductance of monomer array coil effectively drops
Low power supply apparent energy, it is also lower that matching capacitance is more easier cost.The damage of small permutation unit, the influence to global circuit
Smaller, replacement is opposite to be easier to.
The equivalent structure of traditional LCL composite resonant topology is as shown in Figure 1, be wherein L0Emit end compensating inductance, r0It is it
Internal resistance, L0It is transmitting coil inductance, r0It is its internal resistance, C0It is transmitting terminal compensating electric capacity, L0It is receiving coil inductance, r0It is in it
Resistance, C2It is receiving end compensating electric capacity.M is the mutual inductance between transmitting coil and receiving coil, ZLIt is receiving end load.The ginseng of the structure
Number meets L0=L3, system resonance angular frequencyAssuming that load is ZL=RL+jXL=ALejθ, impedance angleWhen system resonance is in resonant state, transmitting terminal coil current virtual value is calculated are as follows:
Work as satisfactionWhen, above formula is equal to
The formula prove meet certain condition lower transmitting end-coil current effective value only with source voltage and transmitting coil inductance
Be worth it is related, with load variation and coefficient of coup variation it is unrelated.Actually internal resistance r0、r1Value very little itself, for inductance coil,
Its internal QValue it is very big, thereforeIt is certain to meet.ForK gets over hour, meets that the corresponding minimum load mould of the condition is smaller, and transmitting coil constant-current characteristics is better.
In the wireless energy transfer system that transmitting terminal is array coil, LCL compensation network is used to realize transmitting end line
When the constant current drive of circle, need for one compensation inductance identical with its self-induction of the additional coiling of each array emitter coil.This
Sample not only will increase the cost of manufacture of equipment, while the occasion for needing to adjust in transmitting terminal coil inductance, and compensation inductance value is difficult to
Adjustment is followed, the expansion of equipment is also greatly limited.
Summary of the invention
When the present invention is to solve the existing constant current drive for using LCL compensation network to realize transmitting end-coil, need
It is caused to increase being fabricated to for equipment for one compensation inductance identical with its self-induction of the additional coiling of each array emitter coil
This, and the occasion for needing to adjust in transmitting terminal coil inductance, it compensates inductance value and is difficult to follow adjustment, the expansion of limiting device
The problem of, propose a kind of composite LCL structure based on array lines ring type wireless energy transfer.
Composite LCL structure of the present invention based on array lines ring type wireless energy transfer, it includes high frequency pumping
Unit 1, the first power switch K1, the second power switch K2, the first array coil L1, second array coil L2 and compensation capacitor
C1；
The power input of high frequency pumping unit 1 connects power supply buses, and the output end all the way of high frequency pumping unit 1 connects simultaneously
One end of the first power switch K1 and one end of the first array coil L1 are connect, the other end of the first array coil L1 connects benefit simultaneously
Repay one end of capacitor C1 and one end of second array coil L2；
The another output end of high frequency pumping unit 1 connects one end and the second array coil of the second power switch K2 simultaneously
The other end of the other end of L2, the other end of the first power switch K1 and the second power switch K2 are all connected with compensation capacitor C1's
The other end.
The working method of composite LCL structure based on array lines ring type wireless energy transfer, this method specifically:
Original state are as follows: high frequency pumping unit 1, the first power switch K1 and the second power switch K2 are in shutdown shape
State；
When needing the first array coil L1 work, the first power switch K1 is first driven to be connected, then by high frequency pumping unit 1
Conducting, to generate constant exciting current in the first array coil L1；
When without the first array coil L1 work, then high frequency pumping unit 1 and the first power switch K1 are sequentially turned off, is returned
To original state；
When needing second array coil L2 to work, the second power switch K2 is first driven to be connected, then by high frequency pumping unit 1
Conducting, to generate constant exciting current in second array coil L2.When without second array coil L2 work, then sequentially
High frequency pumping unit 1 and the second power switch K2 are turned off, original state is returned to.
Composite LCL structure of the present invention based on array lines ring type wireless energy transfer the utility model has the advantages that
1, two groups of transmitting terminal array coils are needed each other as respective compensation inductance with solving in traditional LC L topology
The problem of one power inductance of additional production, the production volume of monomer power supply is reduced, circuit cost has been saved.
2, in traditional LCL collocation structure, compensation inductance be often a fixed value, therefore, it is difficult to adjust transmitting coil from
Sense is to adapt to different power supply occasions, such issues which can effectively overcome, adaptable.
3, using the resonance structure of LCL, constant excitation is formed in transmitting coil in a manner of hardware constant-current, is not only had
Faster response speed, can more reduce system control complexity, and it is wider load and coupling coefficient range under keep compared with
High efficiency.
4, it is applied to array coil structure, has higher electromagnetic security, belong to the application structure of a kind of pair of people's friendly.
5, modular transmitting unit structure design, compared to traditional long straight guide structure, line loss is smaller, has more
High efficiency.
Detailed description of the invention
Fig. 1 is the equivalent circuit of existing LCL resonance；
Fig. 2 is the circuit diagram of the composite LCL structure of the present invention based on array lines ring type wireless energy transfer；
Fig. 3 is to be mounted on the energy emission system of special charging road described in specific embodiment and be mounted on electric car
On energy acceptance system structural schematic diagram.
Specific embodiment
Specific embodiment one, embodiment is described with reference to Fig. 2, described in present embodiment based on array lines ring type without
Heat input transmission composite LCL structure, it include high frequency pumping unit 1, the first power switch K1, the second power switch K2,
First array coil L1, second array coil L2 and compensation capacitor C1；
The power input of high frequency pumping unit 1 connects power supply buses, and the signal output end all the way of high frequency pumping unit 1 is same
When connect one end of the first power switch K1 and one end of the first array coil L1, the other end of the first array coil L1 connects simultaneously
Connect one end of compensation capacitor C1 and one end of second array coil L2；
The another output end of high frequency pumping unit 1 connects one end and the second array coil of the second power switch K2 simultaneously
The other end of the other end of L2, the second power switch of other end K2 of the second power switch K2 is all connected with the another of compensation capacitor C1
One end.
The high frequency pumping unit of present embodiment is the power conversion unit that output is high-frequency ac, and input side is according to different
Form of bus bars can be direct current input (high frequency pumping unit is regarded as a high-frequency inverter at this time), be also possible to exchange input
(high frequency pumping unit is regarded as rectifier cascade high-frequency inverter at this time).
Specific embodiment two, present embodiment be to described in specific embodiment one based on the wireless energy of array lines ring type
Measure the further explanation of the composite LCL structure of transmission, the structure and induction reactance of the first array coil L1 and second array coil L2
It is worth all the same.
Specific embodiment three, present embodiment be to described in specific embodiment one based on the wireless energy of array lines ring type
The further explanation of the composite LCL structure of transmission is measured, the first power switch K1 and the second power switch K2 are that full-control type is double
To device for power switching.
Specific embodiment four, present embodiment are described in specific embodiment one based on array lines ring type wireless energy
The working method of the composite LCL structure of transmission, this method specifically:
Original state are as follows: high frequency pumping unit 1, the first power switch K1 and the second power switch K2 are in shutdown shape
State；
When needing the first array coil L1 work, the first power switch K1 is first driven to be connected, then by high frequency pumping unit 1
Conducting, to generate constant exciting current in the first array coil L1；
When without the first array coil L1 work, then high frequency pumping unit 1 and the first power switch K1 are sequentially turned off, is returned
To original state；
When needing second array coil L2 to work, the second power switch K2 is first driven to be connected, then by high frequency pumping unit 1
Conducting, to generate constant exciting current in second array coil L2.When without second array coil L2 work, then sequentially
High frequency pumping unit 1 and the second power switch K2 are turned off, original state is returned to.
Specific embodiment:
As shown in figure 3, a set of transmitting terminal is the wireless energy transfer system of array coil, by being mounted on special charging road
The energy emission system on road and the energy acceptance system being mounted on electric car form.Common frequency power network is filled through simple transformation of electrical energy
It postpones, provides electric energy input as high frequency pumping unit in the form of three-phase alternating current.(it should be pointed out that being with three-phase here
For ac bus, be also possible to direct current or other form of bus bars) described in n group composite LCL mechanism, be 2n group transmitting terminal battle array
Alignment circle provides excitation.Wherein 2a-1 group composite LCL mechanism provides for 4a-3 and 4a-1 group transmitting terminal array coil
Excitation, 2a group composite LCL mechanism provide excitation for 4a-2 and 4a group transmitting terminal array coil.
It is described below when electric car face 4a-4 group transmitting coil, and be sequentially moved to 4a+1 group transmitting coil
When, the course of work of 2a-1 and 2a group composite LCL mechanism.
When electric car face 4a-4 group transmitting coil, 2a-1 group composite is controlled by corresponding control circuit
The power switch S of LCL mechanism4a-3Conducting, later on 2a-1 group high frequency pumping unit, so that 4a-3 group transmitting coil mentions
Preceding generation excitation.
When electric car is moved to face 4a-3 group transmitting coil, by the control 2a group multiplexing of corresponding control circuit
The power switch S of type LCL mechanism4a-2Conducting, later on 2a group high frequency pumping unit, so that 4a-2 group transmitting coil mentions
Preceding generation excitation.
It is multiple by corresponding control circuit control 2a-1 group when electric car is moved to face 4a-2 group transmitting coil
It is turned off with the 2a-1 group high frequency pumping unit of type LCL mechanism, then disconnects power switch S4a-3And closed power switch S4a-1,
Then 2a-1 group high frequency pumping unit is reopened, so that 4a-1 group transmitting coil generates excitation in advance.
When electric car is moved to face 4a-1 group transmitting coil, by the control 2a group multiplexing of corresponding control circuit
The 2a group high frequency pumping unit of type LCL mechanism turns off, and then disconnects power switch S4a-2And closed power switch S4a, then weigh
It is new to open 2a group high frequency pumping unit, so that 4a group transmitting coil generates excitation in advance.
When electric car is moved to face 4a group transmitting coil, by the control 2a-1 group multiplexing of corresponding control circuit
The 2a-1 group high frequency pumping unit of type LCL mechanism turns off, and then disconnects power switch S4a-1, make 2a-1 group composite LCL
Mechanism is in original state.
When electric car is moved to face 4a+1 group transmitting coil, by the control 2a group multiplexing of corresponding control circuit
The 2a group high frequency pumping unit of type LCL mechanism turns off, and then disconnects power switch S4a, make at 2a group composite LCL mechanism
In original state.
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
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (3)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108110910A (en) * | 2017-12-28 | 2018-06-01 | 哈尔滨工业大学 | Multiplexing CLCC structure based on array coil wireless energy transmission and its working method |
| CN109756008B (en) * | 2019-01-16 | 2020-02-21 | 哈尔滨工业大学 | A Connection Topology of Power Supply and Transmitting Array Coil Based on Switching Network |
| CN111371192B (en) * | 2020-03-24 | 2022-06-10 | 山东大学 | Method and system for matching robot wireless charging power and protecting open circuit |
| CN113595259B (en) * | 2021-07-05 | 2024-03-26 | 哈尔滨工业大学 | An integrated rail distributed switching power supply topology based on LCL compensation |
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| CN104682580A (en) * | 2015-03-24 | 2015-06-03 | 哈尔滨工业大学 | Dynamic wireless power supply system used for electric vehicle and based on parallel multistage composite resonant structures and power supply method realized by adopting system |
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| CN105207374A (en) * | 2015-10-30 | 2015-12-30 | 武汉大学 | Wireless power transmission system and method as well as tracking-type transmitting coil devices |
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| US9608465B2 (en) * | 2014-04-18 | 2017-03-28 | Qualcomm Incorporated | Devices, systems, and method for power control of dynamic electric vehicle charging systems |
| US20160023557A1 (en) * | 2014-07-25 | 2016-01-28 | Qualcomm Incorporated | Devices, systems, and method for dynamic electric vehicle charging with position detection |
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| CN105119392A (en) * | 2015-09-30 | 2015-12-02 | 武汉大学 | Electric car dynamic wireless power supply system based on resonance magnetic coupling technology and method |
| CN105207374A (en) * | 2015-10-30 | 2015-12-30 | 武汉大学 | Wireless power transmission system and method as well as tracking-type transmitting coil devices |
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