CN116264418A - Electric energy wireless transmission system based on independently select transmitting coil - Google Patents
Electric energy wireless transmission system based on independently select transmitting coil Download PDFInfo
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- CN116264418A CN116264418A CN202111536793.5A CN202111536793A CN116264418A CN 116264418 A CN116264418 A CN 116264418A CN 202111536793 A CN202111536793 A CN 202111536793A CN 116264418 A CN116264418 A CN 116264418A
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- 230000003321 amplification Effects 0.000 claims abstract description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 14
- 239000012141 concentrate Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 10
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
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- 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
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- 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
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- 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
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- 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
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
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- 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
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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- 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
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention discloses an electric energy wireless transmission system based on an autonomous selection transmitting coil, which comprises: the power amplifier comprises a control storage module, a switch array module and a detection module which are connected with the control storage module, a power amplification module which is connected with the switch array module and the detection module, a signal module which is connected with the power amplification module, a transmitting coil module which is connected with the switch array module, and a DC-DC module which is used for supplying power for each module. According to the invention, the dominant transmitting coil is judged by detecting the input power change of the coils on each surface of the cube coil module, the system automatically selects the dominant transmitting coil to concentrate the system power to directionally transmit the electric energy, so that the multi-azimuth high-freedom wireless electric energy transmission is realized, the wireless electric energy transmission range of the system can be enlarged, and meanwhile, the concentrated electric energy transmission can be realized, and the system efficiency is improved.
Description
Technical Field
The invention belongs to wireless power transmission, and particularly relates to a wireless power transmission system based on an autonomous selection transmitting coil.
Background
With the continuous maturity of the wireless transmission technology of electric energy, the product of wireless transmission of electric energy has been promoted and has been developed fast. The magnetic resonance coupling type electric energy wireless transmission technology has the advantages of long-distance electric energy transmission, high-power high-efficiency transmission and support of charging of a plurality of devices, and is widely studied. In the research direction of electric energy transmission of high-power equipment, the method is applied to electric energy transmission of equipment such as industrial robots, electric automobiles and the like; in the research direction of low-power electric energy transmission, the battery charger is widely applied to wireless charging of smart phones, computers and small robots. However, the actual energy transmission effect of the current magnetic resonance type charging system is not ideal, and the problems of low transmission efficiency and power, incapability of transmitting information or poor quality of transmitting information, small transmission range and the like are faced. Currently, a wireless charging system based on a magnetic coupling resonance mode is mainly researched based on a plane single or multiple coils, an energy transmission space is limited to partial areas on the front and back sides of a transmitting coil, and the degree of freedom of energy transmission is limited. In the existing multi-coil system, energy waste is caused by the fact that electric energy cannot be transmitted directionally due to the fact that the direction of receiving equipment cannot be identified, and the defects of unfocused electric energy transmission, small range and low efficiency exist. Therefore, the system is increased in the space power transmission range, the direction of the receiving end is distinguished, and the power transmission power of the concentrated system is key to solving the existing problems.
Currently, the most similar methods are the following 2.
Scheme 1: the common multi-coil magnetic induction wireless charging system in the market at present utilizes a plurality of plane coils to be horizontally staggered and overlapped to increase the plane range of electric energy transmission. The wireless charging system based on the magnetic induction mode has short transmission distance, generally within 5 cm, and can obtain ideal charging efficiency only by aligning the receiving end with the transmitting coil, and the power transmission efficiency is drastically reduced when the receiving and transmitting coils deviate, so that the power transmission range is smaller.
Scheme 2: the wireless charging system based on the radio wave mode realizes energy directional transmission through magnetic field superposition of a plurality of antennas. The energy transmission mode based on radio waves has the advantages of long transmission distance, wide range, free movement of the position and the like. But has the defects of low transmission efficiency, low transmission power based on microwaves and high loss in the energy transmission process.
Disclosure of Invention
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides an electric energy wireless transmission system based on an autonomous selection transmitting coil, which comprises the following components: the power amplifier comprises a control storage module, a switch array module and a detection module which are connected with the control storage module, a power amplification module which is connected with the switch array module and the detection module, a signal module which is connected with the power amplification module, a transmitting coil module which is connected with the switch array module, and a DC-DC module which is used for supplying power for each module.
Further, the transmitting coil module is a cube or a cuboid. Six sides of the transmitting coil module are respectively provided with an independent plane coil; the coils are independently connected into the switch array module.
Further, the identification method of the dominant transmitting coil comprises the following steps:
s1: the control storage module is used for respectively enabling each coil in the transmitting coil module to be independently connected with the power amplification module by controlling the switch array module;
s2: under the no-load condition, the detection module obtains the initial input power of each coil and feeds back the initial input power to the control storage module;
s3: and under the loaded condition, the input power of each transmitting coil is compared with the initial input power, when the increase of the input power of the transmitting coil is detected, the transmitting coil corresponding to the maximum power increment is considered as the leading transmitting coil, the direction of the coil is the direction of the receiving end, the control storage module controls the coil to be independently communicated with the power amplifying module to concentrate the electric energy, and the electric energy is transmitted to the receiving end through the coil.
Further, in step S3, the specific method of determining the dominant transmit coil comprises the steps of:
s31: the system is started, the system is unloaded, and the control storage module controls the switch array to enable the coil C i The power amplifying module is connected to provide amplified signal, and the detection module detects and feeds back the input power of the power amplifying module, which is recorded as P i The control storage module records the input power as initial power;
s32: control the memory module to obtain initial power P of coil i After that, continuously detecting the input power E when all coils are respectively connected to the power amplifying modules i Calculating the power change delta P of each coil i ，ΔP i The coil corresponding to the maximum value is the dominant transmitting coil;
wherein i is less than or equal to 6, and delta P i ＝E i -P i 。
Further, in step S32, in order to avoid power variation due to instability of the circuit, a power variation threshold m is set, and if Δp is set i Not less than m, consider coil C i The input power changes and the system detects the delay cancellation.
The invention provides a new multi-coil structure based on a magnetic resonance coupling electric energy wireless transmission technology to increase the transmission range of a system, and provides a new detection method and a coil selection method to detect the position of a receiving end and concentrate system power to concentrate electric energy transmission to the receiving end.
According to the invention, the dominant transmitting coil is judged by detecting the input power change of the coils on each surface of the cube coil module, the system automatically selects the dominant transmitting coil to concentrate the system power to directionally transmit the electric energy, so that the multi-azimuth high-freedom wireless electric energy transmission is realized, the wireless electric energy transmission range of the system can be enlarged, and meanwhile, the concentrated electric energy transmission can be realized, and the system efficiency is improved.
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.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a system configuration diagram.
Fig. 2 is a flow chart of autonomous selection coils.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
The technical scheme of the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a wireless power transmission system based on an autonomous selection of a transmitting coil, comprising: the power amplifier comprises a control storage module, a switch array module and a detection module which are connected with the control storage module, a power amplification module which is connected with the switch array module and the detection module, a signal module which is connected with the power amplification module, a transmitting coil module which is connected with the switch array module, and a DC-DC module which is used for supplying power for each module.
Wherein, control the storage module: and storing and processing the power information of the power amplification module fed back by the detection module, and controlling the switch array module to enable the transmitting coil module to be connected with the power amplification module. And a detection module: and detecting the input power of the signal module to the power amplifying module and feeding back detection information to the control storage module. A switch array module: and controlling different coils to be connected into the power amplifier. Three-dimensional transmitting coil module: as a system transmitting end. The shape is cube or cuboid, and six faces are independent square plane coils, and each coil is independently connected with the switch array module. And a power amplification module: the signal module provides an input signal and outputs an amplified signal to the transmit coil module via the switch array module. And a signal module: a sinusoidal input signal is provided to the power amplifier. DC-DC module: and outputting different working voltages to supply power for each module.
In an embodiment of the present invention, the transmitting coil module is a cube or a cuboid. Six sides of the transmitting coil module are respectively provided with an independent plane coil; the coils are independently connected into the switch array module.
In an embodiment of the present invention, the identification method of the dominant transmitting coil includes the following steps:
s1: the control storage module is used for respectively enabling each coil in the transmitting coil module to be independently connected with the power amplification module by controlling the switch array module;
s2: under the no-load condition, the detection module obtains the initial input power of each coil and feeds back the initial input power to the control storage module;
s3: and under the loaded condition, the input power of each transmitting coil is compared with the initial input power, when the increase of the input power of the transmitting coil is detected, the transmitting coil corresponding to the maximum power increment is considered as the leading transmitting coil, the direction of the coil is the direction of the receiving end, the control storage module controls the coil to be independently communicated with the power amplifying module to concentrate the electric energy, and the electric energy is transmitted to the receiving end through the coil.
When the receiving end is close to the multi-coil system for charging, the transmitting coil (one or more coils with smaller distance from the receiving end) in a strong coupling state plays a leading role in the charging process, and if the system supplies power to each coil, the condition of electric energy waste occurs, so that the efficiency of the system is reduced. The coil which concentrates the electric energy to the dominant effect supplies power to the receiving end, so that the charging distance and the system efficiency can be improved. Under the condition of fixed power amplifier input voltage, the power amplifier input power changes due to the coupling state change between the transmitting coil and the receiving end. When in strong coupling (the distance between the receiving and transmitting coils is smaller), the input power of the power amplifier is increased compared with that when the system is in no-load (no receiving end), and the increment of the input power is reduced along with the weakening of the coupling degree (the distance between the receiving and transmitting coils is larger). From this characteristic, the dominant coil can be determined. The receiving end comprises a receiving coil and electric equipment.
In the embodiment provided by the present invention, in step S3, as shown in fig. 2, a specific method for determining a dominant transmitting coil includes the following steps:
the system is started, the system is unloaded, and the control storage module controls the switch array to enable the coil C i The power amplifying module is connected to provide amplified signal, and the detection module detects and feeds back the input power of the power amplifying module, which is recorded as P i The control storage module records the input power as initial power, and records initial power P= { P of all coils according to the same method 1 ，P 2 ，P 3 ，P 4 ，P 5 ，P 6 }。
The system obtains the initial P of the coil i Then continuously detecting the input power of all coils when the coils are respectively connected into the power amplifier and recording the input power as E i ，E＝{E 1 ，E 2 ，E 3 ，E 4 ，E 5 ，E 6 Calculating the power change of each coil as delta P i ，ΔP i ＝E i -P i 。ΔP＝{ΔP 1 ，ΔP 2 ，ΔP 3 ，ΔP 4 ，ΔP 5 ，ΔP 6 }。
In order to avoid power variation due to instability of the circuit, a power variation threshold m (determined by the actual situation) is set. ΔP i Not less than m, consider coil C i The input power changes and the system detects the delay cancellation. Wherein i is less than or equal to 6, and delta P i ＝E i -P i 。
In the embodiment provided by the invention, in order to avoid the power variation caused by the instability of the circuit, a power variation threshold value m is set, if delta P i Not less than m, consider coil C i The input power is changed, the system detection delay is canceled, otherwise, the coil C is considered i No change in input power occurs.
At DeltaP i In presence of delta P i When the power is not less than m, the label b counts 1 time, and when the power is not changed, the label a counts 1 time.
When a=0 and b=x, the power change exists continuously for X times (X represents the number of times of continuously occurring power change), a coil corresponding to the maximum power change is found out, and the coil is set as a dominant transmitting coil and connected into a power amplifier, and other coils are suspended. and a, b is cleared, and the power change of the main transmitting coil is continuously detected, wherein X is determined by actual requirements. When the power change occurs continuously for X times, the receiving end is on the side of the corresponding coil, and a complete detection period is not needed, so that the corresponding transmitting coil is quickly connected into the power amplifier to work.
When a+b=n, a-b is larger than or equal to Y, n times of power detection (n is a detection period, n times of detection is one period), the situation of no power change occurs in a large probability, the system is considered to be a receiving-free access system, a and b are cleared, and the system continuously detects the power change, wherein n and Y are determined by actual requirements.
When a+b=n and a-b is less than or equal to Y, n times of power detection show that the power change occurs in a large probability, the system considers that the receiving end is accessed to the system, a coil corresponding to the maximum power change is selected, and the coil is set as a leading transmitting coil to be accessed to the power amplifier, and other coils are suspended. a, b are cleared, and the power change of the dominant transmitting coil is continuously detected, wherein n and Y are determined by actual requirements.
That is, a-b represents the difference between the number of power changes and the number of no power changes in the detection period, when the difference is 0, the probability of occurrence of the two cases is the same, and when the difference is greater than zero and greater than the threshold value Y, it represents that the system detects the power change with high probability, and it can be considered that the receiving end has been connected to the system on the power change coil side.
When a=z and b=0, the system is determined as a non-receiving-side access system by continuously changing Z times (Z represents the number of times of continuously changing the non-power), and the system is cleared a, b, the delay is added in the power detection, the detection frequency is reduced, and the energy consumption of the system is reduced, wherein Z is determined by the actual requirement. Namely, when no power changes are generated continuously for Z times, no receiving end exists on the surface, a complete detection period is not needed, and the coil is quickly disconnected from the power amplifier.
Although embodiments of the invention have been disclosed above, they are not limited to the use listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. Accordingly, the present invention is not limited to the particular embodiments described above, which are intended to be illustrative only and not limiting, as many forms can be made by those of ordinary skill in the art without departing from the spirit of the invention and the scope of the appended claims, which are to be construed as embodying the present invention.
Claims (6)
1. An autonomous selective transmission coil-based wireless power transmission system, comprising: the power amplifier comprises a control storage module, a switch array module and a detection module which are connected with the control storage module, a power amplification module which is connected with the switch array module and the detection module, a signal module which is connected with the power amplification module, a transmitting coil module which is connected with the switch array module, and a DC-DC module which is used for supplying power for each module.
2. An autonomous selective transmission system for power wireless according to claim 1, wherein the transmission coil module is a cube or a cuboid.
3. An autonomous selective transmission system for electric energy wireless according to claim 2, wherein the six sides of the transmission coil module are each provided with an independent planar coil;
the coils are independently connected into the switch array module.
4. A wireless power transfer system based on an autonomous selection of a transmit coil as claimed in claim 3 wherein the method of identification of the dominant transmit coil comprises the steps of:
s1: the control storage module is used for respectively enabling each coil in the transmitting coil module to be independently connected with the power amplification module by controlling the switch array module;
s2: under the no-load condition, the detection module obtains the initial input power of each coil and feeds back the initial input power to the control storage module;
s3: and under the loaded condition, the input power of each transmitting coil is compared with the initial input power, when the increase of the input power of the transmitting coil is detected, the transmitting coil corresponding to the maximum power increment is considered as the leading transmitting coil, the direction of the coil is the direction of the receiving end, the control storage module controls the coil to be independently communicated with the power amplifying module to concentrate the electric energy, and the electric energy is transmitted to the receiving end through the coil.
5. An autonomous selective transmission coil based power wireless transmission system according to claim 4, wherein in step S3 the specific method of determining the dominant transmission coil comprises the steps of:
s31: the system is started, the system is unloaded, and the control storage module controls the switch array to enable the coil C i The power amplifying module is connected to provide amplified signal, and the detection module detects and feeds back the input power of the power amplifying module, which is recorded as P i The control storage module records the input power as initial power;
s32: control the memory module to obtain initial power P of coil i After that, continuously detecting the input power E when all coils are respectively connected to the power amplifying modules i Calculating the power change delta P of each coil i ，ΔP i The coil corresponding to the maximum value is the dominant transmitting coil;
wherein i is less than or equal to 6, and delta P i ＝E i -P i 。
6. The wireless power transmission system based on the autonomous selection of a transmitting coil as claimed in claim 5, wherein in step S32, in order to avoid power variation due to instability of the circuit, a power variation threshold m is set, if Δp i Not less than m, consider coil C i The input power changes and the system detects the delay cancellation.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111536793.5A CN116264418A (en) | 2021-12-15 | 2021-12-15 | Electric energy wireless transmission system based on independently select transmitting coil |
| PCT/CN2022/138198 WO2023109707A1 (en) | 2021-12-15 | 2022-12-09 | Wireless electrical energy transmission system based on autonomously selected transmitting coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111536793.5A CN116264418A (en) | 2021-12-15 | 2021-12-15 | Electric energy wireless transmission system based on independently select transmitting coil |
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| CN116264418A true CN116264418A (en) | 2023-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111536793.5A Pending CN116264418A (en) | 2021-12-15 | 2021-12-15 | Electric energy wireless transmission system based on independently select transmitting coil |
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| WO (1) | WO2023109707A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130083660A (en) * | 2012-01-13 | 2013-07-23 | 삼성전기주식회사 | Appratus and method for transmitting wireless power |
| CN103259297B (en) * | 2012-02-17 | 2017-03-01 | 联想(北京)有限公司 | Wireless charging control method and wireless charging device |
| US9601930B2 (en) * | 2012-09-28 | 2017-03-21 | Broadcom Corporation | Power transmitting device having device discovery and power transfer capabilities |
| CN104917263A (en) * | 2014-03-10 | 2015-09-16 | 陈业军 | Ground-emitting device for wireless charging |
| CN111064239B (en) * | 2019-11-01 | 2022-06-14 | 东南大学 | Load positioning and power constant control method for three-dimensional wireless charging system |
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2021
- 2021-12-15 CN CN202111536793.5A patent/CN116264418A/en active Pending
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- 2022-12-09 WO PCT/CN2022/138198 patent/WO2023109707A1/en unknown
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