CN110739779A - method for researching influence of temperature on magnetic coupling resonance wireless power transmission efficiency - Google Patents
method for researching influence of temperature on magnetic coupling resonance wireless power transmission efficiency Download PDFInfo
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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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Abstract
The invention discloses a method for researching the influence of temperature on magnetic coupling resonance wireless power transmission efficiency, which comprises the steps of obtaining a transmission efficiency formula of a system according to an equivalent circuit diagram of a magnetic coupling resonance wireless power transmission system, obtaining mutual inductance between a transmitting coil and a receiving coil according to a mutual inductance formula between the coils, determining winding materials of the transmitting coil and the receiving coil, obtaining a relation formula between temperature and material conductivity according to a temperature coefficient of the determined materials, obtaining a relation formula between ohmic loss and radiation loss resistance of the transmitting coil and the receiving coil and temperature, obtaining a relation formula between the magnetic coupling resonance wireless power transmission efficiency and the temperature, and carrying out simulation analysis.
Description
Technical Field
The invention belongs to the technical field of magnetic coupling resonance wireless power transmission, and relates to methods for researching influence factors of magnetic coupling resonance wireless power transmission efficiency, in particular to methods suitable for researching influence of temperature on magnetic coupling resonance wireless power transmission efficiency.
Background
With the progress of science and technology and the improvement of the national standard of living, various electrical equipment gradually enters the daily life of people, the requirements of people on the convenience and the intelligence of a power supply mode are higher and higher, the traditional wire power supply mode can not meet the requirements of people at all, therefore, the wireless power transmission technology is brought forward, samples of wireless power transmission and wireless communication are adopted, wireless power transmission is realized, the wireless power transmission technology is power transmission realized by means of soft media such as a magnetic field, an electric field, microwaves and the like, and is cross theory and application research of multiple subjects such as collection of electromagnetism, power electronics, antenna technology, circuit analysis theory, high-frequency electronics, coupling mode theory, wireless communication technology and the like, the wireless power transmission technology avoids direct contact of a power source and the electrical equipment, safe and efficient transmission modes can be applied to complex and severe environments, and is evaluated as in the ten great scientific research directions by technical comments of the United states.
The microwave type wireless power transmission technology is mainly used for transmitting energy in a non-radiative near field mode, and has the advantages of high transmission efficiency, large output power, long transmission distance, small electromagnetic radiation influence and the like.
The magnetic coupling resonance wireless power transmission technology has a plurality of advantages, is widely concerned by of world scientists, and is rapidly developed, along with the development of the magnetic coupling resonance wireless power transmission technology, the application range of the technology is more and more , particularly, the technology has strong requirements on the wireless power transmission technology in severe environments such as underground coal mines, underwater, high-temperature monitoring of boilers, refrigeration workshops and high-voltage equipment temperature detection.
Therefore, methods for researching the influence of temperature on the transmission efficiency of the magnetic coupling resonance wireless power have to be found.
Disclosure of Invention
The invention aims to solve the technical problems that methods for researching the influence of temperature on the transmission efficiency of the magnetic coupling resonance wireless power are provided, so that the analysis of the influence of the temperature on the transmission efficiency can be simplified, the design of a magnetic coupling resonance wireless power transmission system in the environment with large temperature, low temperature and temperature change is facilitated, the influence of the environmental temperature on the transmission efficiency of the magnetic coupling resonance wireless power is researched, and the method has important significance for the application of the wireless power transmission technology in the high-temperature environment such as a boiler, the low-temperature environment such as a refrigeration workshop and the like, the underground coal mine with large environmental temperature change and other special occasions.
In order to solve the technical problems, the invention adopts the following technical scheme:
A method for studying the effect of temperature on the transmission efficiency of magnetic coupling resonance wireless power, the method comprises the following steps:
step A: solving a transmission efficiency formula of the system according to an equivalent circuit diagram of the magnetic coupling resonance wireless power transmission system;
and B: obtaining mutual inductance between the transmitting coil and the receiving coil according to a mutual inductance formula between the coils;
and C: determining winding materials of the transmitting coil and the receiving coil;
step D: obtaining a relation formula between the temperature and the conductivity of the material in the step C according to the temperature coefficient of the material determined in the step C;
step E: according to a calculation formula of ohmic loss and radiation loss resistance of the coil under the high-frequency condition and the relation formula between the temperature and the conductivity obtained in the step D, solving a relation formula between ohmic loss and radiation loss resistance of the transmitting coil and the receiving coil and the temperature;
step F: obtaining a relation formula between the magnetic coupling resonance wireless power transmission efficiency and the temperature according to the transmission efficiency formula of the magnetic coupling resonance wireless power transmission system obtained in the step A, the mutual inductance between the transmitting coil and the receiving coil obtained in the step B, and the relation formula between the ohmic loss and the radiation loss resistance of the transmitting coil and the receiving coil obtained in the step E and the temperature;
step G: and F, carrying out simulation analysis according to the relation formula between the magnetic coupling resonance wireless power transmission efficiency and the temperature obtained in the step F.
The methods for researching the influence of temperature on the transmission efficiency of the magnetic coupling resonance wireless power derive the relation formulas between the temperature and the electric conductivity of the winding materials of the transmitting coil and the receiving coil, and between the ohmic loss and the radiation loss resistance of the transmitting coil and the receiving coil.
methods for researching the influence of temperature on the transmission efficiency of the magnetic coupling resonance wireless power, which are characterized in that a relational formula between the temperature and the transmission efficiency of the magnetic coupling resonance wireless power is deduced through a relational formula between ohmic losses and radiation loss resistances of the temperature and a transmitting coil and a receiving coil.
The invention has the beneficial effects that:
1. the method reduces the complexity of researching the influence of the temperature on the efficiency of the magnetic coupling resonance wireless power transmission system, and is easy to understand.
2. The design of the magnetic coupling resonance wireless power transmission system in the environment with high temperature, low temperature and large temperature change is facilitated.
3. The magnetic coupling resonance wireless power transmission technology has important significance in the application of high-temperature environments such as boilers and the like, low-temperature environments such as refrigeration workshops and the like, and special occasions such as coal mines with large environmental temperature changes and the like.
Drawings
FIG. 1 is a schematic diagram of a magnetically coupled resonant wireless power transfer system according to the present invention;
fig. 2 is an equivalent circuit diagram of a magnetically coupled resonant wireless power transfer system according to the present invention;
FIG. 3 is a graph of the effect of temperature on the efficiency of a magnetically coupled resonant wireless power transfer system at different transfer distances;
FIG. 4 is a graph of the effect of temperature on the efficiency of a magnetically coupled resonant wireless power transfer system at different load resistance values;
FIG. 5 is a graph of the effect of temperature on the efficiency of a magnetically coupled resonant wireless power transfer system at different coil radii;
fig. 6 is a graph of the effect of temperature on the efficiency of a magnetically coupled resonant wireless power transfer system for different coil turns.
Detailed Description
In order to make the contents and advantages of the technical solutions of the present invention more clear, the following detailed description of steps is made on methods for studying the influence of temperature on the transmission efficiency of magnetically coupled resonant wireless power according to the present invention with reference to the accompanying drawings.
The following describes in detail the implementation process of methods for studying the influence of temperature on the transmission efficiency of magnetic coupling resonance wireless power, with reference to the accompanying drawings, and includes the following steps:
step 1: and solving a transmission efficiency formula of the system according to an equivalent circuit diagram of the magnetic coupling resonance wireless power transmission system.
U in FIG. 1SIs a high frequency power supply, C1、C2Resonance capacitances of the transmitter coil and the receiver coil, TX being the transmitter coil, RX being the receiver coil, RLIs a load.
U in FIG. 2SFor high frequency power supply, R1、R2The sum of ohmic loss and radiation loss resistance of the transmitting coil and the receiving coil under high frequency, L1、L2Equivalent inductances, C, of the transmitter coil and the receiver coil, respectively1、C2Resonant capacitances, R, of the transmitting coil and the receiving coil, respectivelyLTo be a load, I1、I2Current in the transmitter and receiver coils, respectively, in the direction shown in fig. 2, M being the mutual inductance between the transmitter and receiver coils.
Since the transmission performance of the magnetic coupling resonance wireless power transmission system is optimal in the resonance state, the magnetic coupling resonance wireless power transmission system is supposed to work in the resonance state in research
From kirchhoff's voltage law, the KVL equation for an equivalent circuit as shown in fig. 2 can be obtained:
then, one can obtain:
the input and output power of the system can be obtained as follows:
the transmission efficiency of the system is:
step 2: and solving the mutual inductance between the transmitting coil and the receiving coil according to a mutual inductance formula between the coils.
The formula for calculating the mutual inductance between the coils when the transmitting coil and the receiving coil have the same parameters and the two coils are coaxial and parallel is as follows:
wherein: mu.s0For vacuum permeability, r is the coil radius, n is the number of coil turns, and D is the distance between the coils.
And step 3: and determining the winding materials of the transmitting coil and the receiving coil.
After the materials of the transmitting coil and the receiving coil are determined, the electric conductivity and the temperature coefficient of the transmitting coil and the receiving coil at normal temperature are also determined, and the electric conductivity is assumed to be sigma at normal temperature, and the temperature coefficient is α.
And 4, step 4: and 3, solving a relation formula between the temperature and the conductivity according to the temperature coefficient of the material determined in the step 3.
The relationship between metal conductivity and temperature is: sigma1＝σ(1.008-αT)。
Wherein: sigma1T is the actual temperature for the actual conductivity of the material being determined at the actual temperature.
And 5: and 4, solving a relational formula between the ohmic loss and the radiation loss resistance of the transmitting coil and the receiving coil and the temperature according to a calculation formula of the ohmic loss and the radiation loss resistance of the coil under the high-frequency condition and the relational formula between the temperature and the conductivity obtained in the step 4.
Ohmic loss resistance R of coil under high frequencyoAnd radiation loss resistance RrThe calculation formulas of (A) and (B) are respectively as follows:
wherein, mu0Is a vacuum magnetic permeability, omega is an angular frequency, n is the number of coil turns, sigma is the electrical conductivity, r is the coil radius, l is the length, a is the wire diameter, h is the coil width, epsilon0Is the dielectric constant and c is the speed of light.
Ohmic loss resistance R of coil under high frequencyoMuch larger than the radiation loss resistance RrSo that only the ohmic loss resistance R is considered for simplicity of calculation at the time of analysisoI.e. R1＝R2＝Ro. The relationship between ohmic loss resistance and temperature can be obtained according to the relationship between conductivity and temperature obtained in step 4:
step 6: and (3) solving a relation formula between the transmission efficiency and the temperature according to the transmission efficiency formula of the magnetic coupling resonance wireless power transmission system obtained in the step (1), the mutual inductance between the transmitting coil and the receiving coil obtained in the step (2) and the relation formula between the ohmic loss and the radiation loss resistance of the transmitting coil and the receiving coil and the temperature obtained in the step (5).
The relation formula between the efficiency and the temperature of the magnetic coupling resonance wireless power transmission system is as follows:
and 7: and 6, carrying out simulation analysis according to the relation formula between the efficiency and the temperature of the magnetic coupling resonance wireless power transmission system obtained in the step 6.
And when the influence of the temperature on the efficiency of the magnetic coupling resonance wireless power transmission system is analyzed, the simulation is carried out by using software matlab. And obtaining influence curves of the temperature on the transmission efficiency when different transmission distances, different load resistance values, different coil radiuses and different coil turns are obtained through simulation, and analyzing the influence curves of the obtained temperature on the efficiency of the magnetic coupling resonance wireless power transmission system.
Example 1:
the magnetic coupling resonance wireless power transmission system in the embodiment comprises a high-frequency power supply, a transmitting coil, a receiving coil, a load and the like. The working frequency of the system is 10MHz, the coil is formed by winding copper wires with the wire diameter of 2mm, and the conductivity of the copper is 5.9 multiplied by 10 at normal temperature7And (5) S/m. The radius of the coil is 0.15m, the number of turns is 10 turns, and the load resistance is 50 omega. In the embodiment, the influence of the temperature on the efficiency of the magnetic coupling resonance wireless power transmission system is analyzed by combining the transmission distances, wherein the transmission distances are 0.1m, 0.15m, 0.2m, 0.25m and 0.3m respectively, and the temperature variation range is-15 ℃ to 200 ℃. An influence curve of the temperature on the efficiency of the magnetic coupling resonance wireless power transmission system at different transmission distances can be obtained through simulation, as shown in fig. 3.
As can be seen from fig. 3, the transmission efficiency gradually decreases with increasing temperature, and the influence of temperature on the transmission efficiency is small at low and normal temperatures, but the influence of temperature on the transmission efficiency is large at high temperature. The larger the transmission distance, the greater the influence of temperature on the transmission efficiency. Therefore, when the magnetically coupled resonant wireless power transmission system is used in a practical high-temperature environment, the transmission distance should be minimized to avoid unstable transmission performance due to temperature rise.
Example 2:
the magnetic coupling resonance wireless power transmission system in the embodiment comprises a high-frequency power supply, a transmitting coil, a receiving coil, a load and the like. The working frequency of the system is 10MHz, the coil is formed by winding copper wires with the wire diameter of 2mm, and the conductivity of the copper is 5.9 multiplied by 10 at normal temperature7And (5) S/m. The radius of the coil is 0.15m, the number of turns is 10 turns, and the transmission distance is 0.2 m. In the embodiment, the influence of temperature on the efficiency of the magnetic coupling resonance wireless power transmission system is analyzed by combining the load resistance values, wherein the load resistance values are respectively 5 omega, 15 omega, 30 omega, 50 omega, 500 omega and 1000 omega, and the temperature variation range is-15 ℃ to 200 ℃. An influence curve of the temperature on the efficiency of the magnetic coupling resonance wireless power transmission system at different load resistance values can be obtained through simulation, as shown in fig. 4.
As can be seen from fig. 4, the transmission efficiency of the magnetic coupling resonance wireless power transmission system gradually decreases with the increase of temperature when the load resistance values are different, and the influence of the temperature on the transmission efficiency decreases first and then increases with the increase of the load resistance values, and load values exist, so that the influence of the temperature on the transmission efficiency of the magnetic coupling resonance wireless power transmission system reaches the minimum value.
Example 3:
the magnetic coupling resonance wireless power transmission system in the embodiment comprises a high-frequency power supply, a transmitting coil, a receiving coil, a load and the like. The working frequency of the system is 10MHz, the coil is formed by winding copper wires with the wire diameter of 2mm, and the conductivity of the copper is 5.9 multiplied by 10 at normal temperature7And (5) S/m. The coil radius is 0.03m, 0.06m, 0.10m, 0.12m, 0.15m and 0.20m respectively, the number of turns is 10 turns, the load resistance is 50 omega, the transmission distance is 0.2m, and the temperature variation range is-15 ℃ to 200 ℃. Temperature-to-magnetic coupling resonance wireless electric energy with different coil radiuses can be obtained through simulationThe effect of the efficiency of the transmission system is shown in fig. 5.
As can be seen from fig. 5, when the radius of the coil is larger than a certain value, the influence of the temperature on the transmission efficiency tends to be stable, and when the radius of the coil is different, the difference in the influence of the temperature on the transmission efficiency is small, and the reduction of the transmission efficiency due to the temperature change cannot be optimized by optimizing the radius of the coil.
Example 4:
the magnetic coupling resonance wireless power transmission system in the embodiment comprises a high-frequency power supply, a transmitting coil, a receiving coil, a load and the like. The working frequency of the system is 10MHz, the coil is formed by winding copper wires with the wire diameter of 2mm, and the conductivity of the copper is 5.9 multiplied by 10 at normal temperature7And (5) S/m. The radius of the coil is 0.15m, the load resistance value is 50 omega, the transmission distance is 0.2m, the number of turns of the coil is respectively 2 turns, 4 turns, 6 turns, 8 turns, 10 turns and 12 turns, and the temperature variation range is-15 ℃ to 200 ℃. An influence curve of the temperature on the efficiency of the magnetic coupling resonance wireless power transmission system when the number of turns of the coil is different can be obtained through simulation, as shown in fig. 6.
Analysis of fig. 6 shows that the influence of temperature on transmission efficiency increases first and then gradually decreases with the increase of the number of coil turns, and finally tends to be stable, when the number of coil turns reaches a fixed value of , the influence of temperature on transmission efficiency hardly changes with the increase of the number of coil turns, the influence of timed temperature on transmission efficiency of coil turns is small, and the decrease of efficiency of the magnetic coupling resonance wireless power transmission system caused by temperature change cannot be optimized by changing the number of coil turns.
The embodiments of the present invention are not limited to the above-described examples, and various changes made without departing from the spirit of the present invention are within the scope of the present invention.
Claims (3)
1, A method for researching the influence of temperature on the transmission efficiency of magnetic coupling resonance wireless power, which is characterized in that the method comprises the following steps:
step A: solving a transmission efficiency formula of the system according to an equivalent circuit diagram of the magnetic coupling resonance wireless power transmission system;
and B: obtaining mutual inductance between the transmitting coil and the receiving coil according to a mutual inductance formula between the coils;
and C: determining winding materials of the transmitting coil and the receiving coil;
step D: obtaining a relation formula between the temperature and the conductivity of the material in the step C according to the temperature coefficient of the material determined in the step C;
step E: according to a calculation formula of ohmic loss and radiation loss resistance of the coil under the high-frequency condition and the relation formula between the temperature and the conductivity obtained in the step D, solving a relation formula between ohmic loss and radiation loss resistance of the transmitting coil and the receiving coil and the temperature;
step F: obtaining a relation formula between the magnetic coupling resonance wireless power transmission efficiency and the temperature according to the transmission efficiency formula of the magnetic coupling resonance wireless power transmission system obtained in the step A, the mutual inductance between the transmitting coil and the receiving coil obtained in the step B, and the relation formula between the ohmic loss and the radiation loss resistance of the transmitting coil and the receiving coil obtained in the step E and the temperature;
step G: and F, carrying out simulation analysis according to the relation formula between the magnetic coupling resonance wireless power transmission efficiency and the temperature obtained in the step F.
2. The method for studying the effect of temperature on the transmission efficiency of magnetic coupling resonance wireless power, according to claim 1, wherein the formula of the relationship between temperature and the ohmic loss and the radiation loss resistance of the transmitter coil and the receiver coil is derived from the formula of the relationship between temperature and the conductivity of the material used to wind the transmitter coil and the receiver coil.
3. The method for researching influence of temperature on magnetic coupling resonance wireless power transmission efficiency according to claim 1, wherein the formula of relationship between temperature and magnetic coupling resonance wireless power transmission efficiency is derived from the formula of relationship between temperature and ohmic loss and radiation loss resistance of the transmitting coil and the receiving coil.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113916943A (en) * | 2021-10-11 | 2022-01-11 | 国家海洋技术中心 | Novel seawater conductivity measurement method and system |
| CN114243949A (en) * | 2021-12-10 | 2022-03-25 | 青岛鲁渝能源科技有限公司 | Explosion-proof wireless charging system and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353844A (en) * | 2011-06-24 | 2012-02-15 | 华南理工大学 | Two-way electrical conductivity detecting and monitoring device with symmetrical lead self-compensation and detecting and monitoring method using same |
| CN105717362A (en) * | 2016-04-22 | 2016-06-29 | 滨州学院 | Measuring device and method for resistivity |
| CN108169565A (en) * | 2017-12-23 | 2018-06-15 | 西安西热电站化学科技有限公司 | A kind of non-linear temperature compensation method for conductivity measurement |
-
2019
- 2019-10-24 CN CN201911018839.7A patent/CN110739779A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353844A (en) * | 2011-06-24 | 2012-02-15 | 华南理工大学 | Two-way electrical conductivity detecting and monitoring device with symmetrical lead self-compensation and detecting and monitoring method using same |
| CN105717362A (en) * | 2016-04-22 | 2016-06-29 | 滨州学院 | Measuring device and method for resistivity |
| CN108169565A (en) * | 2017-12-23 | 2018-06-15 | 西安西热电站化学科技有限公司 | A kind of non-linear temperature compensation method for conductivity measurement |
Non-Patent Citations (3)
| Title |
|---|
| PENGFEI GAO等: "ransmission efficiency analysis and optimization of magnetically coupled resonant wireless power transfer system with misalignments", 《AIP ADVANCES》 * |
| 谭鹏程: "发电机用铜线导电率与温度的关系", 《电机技术》 * |
| 韩茜茜等: "负载对磁耦合谐振式无线电能传输效率的影响研究", 《自动化应用》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113916943A (en) * | 2021-10-11 | 2022-01-11 | 国家海洋技术中心 | Novel seawater conductivity measurement method and system |
| CN113916943B (en) * | 2021-10-11 | 2024-03-01 | 国家海洋技术中心 | Seawater conductivity measurement method and system |
| CN114243949A (en) * | 2021-12-10 | 2022-03-25 | 青岛鲁渝能源科技有限公司 | Explosion-proof wireless charging system and method |
| CN114243949B (en) * | 2021-12-10 | 2024-02-20 | 青岛鲁渝能源科技有限公司 | Explosion-proof wireless charging system and method |
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