CN106385072B - Radio transmission system and application device thereof - Google Patents
Radio transmission system and application device thereof Download PDFInfo
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- CN106385072B CN106385072B CN201610888900.3A CN201610888900A CN106385072B CN 106385072 B CN106385072 B CN 106385072B CN 201610888900 A CN201610888900 A CN 201610888900A CN 106385072 B CN106385072 B CN 106385072B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 53
- 238000004891 communication Methods 0.000 claims description 24
- 230000005855 radiation Effects 0.000 claims description 20
- 230000005284 excitation Effects 0.000 claims description 17
- 230000007246 mechanism Effects 0.000 claims description 7
- 238000004146 energy storage Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 abstract description 8
- 238000010168 coupling process Methods 0.000 abstract description 8
- 238000005859 coupling reaction Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 15
- 230000005672 electromagnetic field Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
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- H02J7/025—
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention mainly belongs to the field of wireless charging, and particularly relates to a radio transmission system and an application device thereof. The system comprises a transmitting part and a receiving part, and is characterized in that the transmitting part comprises a transmitting coil and a transmitting resonance coil, and the receiving part comprises a receiving coil and a receiving resonance coil; the transmitting coil and the transmitting resonance coil are on the same plane, the receiving coil and the receiving resonance coil are on the same plane, and the transmitting part and the receiving part realize electric transmission in a magnetic resonance mode. The exciting coil and the resonant coil are positioned on the same plane, so that direct coupling between collars is effectively reduced, the traction effect of a circuit at the rear end on the receiving coil can be reduced, the Q value of the two coils is higher, the capacity of capturing space energy is improved, and the energy transmission efficiency and the transmission distance are improved.
Description
Technical Field
The invention mainly belongs to the field of wireless charging, and particularly relates to a radio transmission system and an application device thereof.
background
Wireless charging is rapidly spreading out on the market due to its superior user experience. Currently, magnetic induction charging systems are common in the market. Magnetic induction charging systems require contact or positional alignment of the charging device and the device being charged. The advantages of wireless charging are not fully realized. More advanced magnetic resonance charging systems do not need to be contacted or aligned, and can also move freely within a certain range, so that better user experience can be provided. But because the magnetic resonance system requires that the transmit and receive resonances be at the same frequency. Meanwhile, the efficiency of the charging system is greatly determined by the Q value of the transmitting and receiving circuit, and the magnetic resonance charging system is not popularized in a large range. Wherein it is relatively easy to let the transmitting and receiving circuits resonate at the same frequency. How to improve the efficiency of the charger is a problem at present.
The Q value is a main parameter for measuring the inductance and capacitance devices, and refers to the ratio of the inductance presented by the inductance and capacitance devices when the inductance and capacitance devices work under an alternating voltage of a certain frequency to the equivalent loss resistance. The higher the Q value, the lower its loss and the higher the efficiency. The Q values of the standard inductance and capacitance devices in the market are not high enough. Therefore, the Q value of a magnetic resonance charger composed of the existing inductance-capacitance devices on the market is also limited accordingly. Thereby affecting transmission efficiency and transmission distance and thus user experience. For the charging system of the magnetic resonance structure, no matter the charging distance and the charging efficiency, the efficiency of the emission and the receiving has a direct relation.
On the other hand, the wireless power in the wireless charging system of the prior art is equal in all directions, and in the practical use process, the power is hoped to be concentrated in the charging direction and is smaller in other directions, and the prior art causes partial energy waste.
disclosure of Invention
in view of the above problems, the present invention provides a radio transmission system to further increase the Q value of the coil, thereby increasing the working value of the circuit and finally achieving the method of increasing the charging efficiency and distance.
The invention is realized by the following technical scheme:
a radio transmission system comprising a transmitting section and a receiving section, the transmitting section including a transmitting coil and a transmitting resonance coil, the receiving section including a receiving coil and a receiving resonance coil; the transmitting coil and the transmitting resonance coil are in the same plane or approximately in the same plane, the receiving coil and the receiving resonance coil are in the same plane or approximately in the same plane, and the transmitting part and the receiving part realize electric transmission in a magnetic resonance mode.
Further, the number of the transmission resonant coils or the reception resonant coils is at least one, and the radiation direction of the radio transmission system can be controlled by controlling the turn-on of the transmission resonant coils or the reception resonant coils and each of the transmission resonant coils or each of the reception resonant coils.
further, self-resonance points of the transmission coil, the transmission resonance coil, the reception resonance coil, and the reception coil may be different; the difference varies depending on the application and must not exceed one tenth of the bandwidth of the coil.
Further, the shape of the transmitting coil, the resonance coil, and the receiving coil is any one of a circle, an ellipse, or a polygon, or a combination of any two or more thereof.
further, the distance between the transmitting part and the receiving part is changed with the size of the transmitting coil and the receiving coil, and the distance can reach more than 75 centimeters.
Further, the transmitting part is configured on the charging device; the receiving unit is disposed in a device having a rechargeable battery mounted thereon.
a radio transmission system application apparatus using any one of the above radio transmission systems, the radio transmission system application apparatus comprising a charger and a device to be charged corresponding to the charger; the transmitting coil and the transmitting resonance coil of the charger are on the same plane, and the receiving coil and the receiving resonance coil of the equipment to be charged corresponding to the charger are on the same plane.
Further, the charger further comprises a power control circuit 202, a first communication circuit 203, a power supply 204, a first MCU207, a power frequency driver and an interface 205; the power frequency driver and interface 205 is connected to the transmit coil; the power supply receives direct current or alternating current and outputs stable working voltage to provide electric energy for the first MCU, the power frequency driver and the interface; the first MCU207 is directly connected to and monitors the power control circuit 202, the first communication circuit 203, the power source 204 and the power frequency driver and interface 205; the communication circuit ensures the communication with the equipment to be charged corresponding to the charger; the power control circuit 202 regulates the power fed to the transmit coil 206 by controlling the power frequency driver and interface 205.
Further, the device to be charged corresponding to the charger further includes an interface matching and controlling circuit 305, an energy storage element 308, a second MCU307, a second communication circuit 303, an executing mechanism 304, a human-computer interface 309, and an authentication end element 302; wherein the actuator functions to turn on or off the belt charging device; the human-computer interface mainly refers to a biological recognizer comprising a keyboard, a touch screen, a display, a fingerprint recognizer and the like; the function of the authentication end element is to judge whether the operated person is a legal user. The interface matching and control circuit 305 is connected to the receive coil; the second MCU307 is directly connected to and monitors the interface matching and controlling circuit 305, the communication circuit 303, the executing mechanism 304 and the authentication end element 302; the interface matching and control circuit 305 is connected to the energy storage element 308; the second communication circuit 303 realizes communication with the charger.
The invention has the beneficial technical effects that:
(1) The exciting coil and the resonant coil are positioned on the same plane, so that direct coupling among the collars is effectively reduced, and the traction effect of a circuit at the rear end on the exciting coil can be reduced. The Q value of the two coils is higher, so that the capacity of capturing space energy is improved, and the energy transmission efficiency and the transmission distance are improved;
(2) The radiation direction can be adjusted by adjusting the opening of each resonance coil, so that the charging direction is more concentrated, the efficiency is improved, and the energy is saved;
(3) the resonance frequencies of the transmitting coil and the receiving coil are not required to be completely consistent, so that the error can be in a small range, and the process difficulty is reduced;
(4) The distance between the transmitting part and the receiving part of the invention is improved to 150 percent of the original distance, and the use is more convenient.
(5) The radiation direction can be adjusted by selectively connecting different resonant coils, so that the self-adaptive function is achieved, for example, when an electric automobile is charged, if the automobile is not completely parked in place, the charger can control the radiation direction by itself to align a receiver fixed below the automobile, and therefore the effectiveness and the working range of the charger are provided.
description of the drawings:
FIG. 1 is a schematic diagram of the position of an excitation coil and a resonance coil of the present invention;
FIG. 2 is a magnetic field intensity distribution diagram on a coil normal section;
FIG. 3 is a schematic diagram showing the positions of three parallel coils in the same plane;
The electromagnetic field intensity of the plane where the normal lines of the three coils are located in the figures 4 and 3 is shown schematically;
The electromagnetic field intensity of the plane where the normal lines of the three coils are located in the graphs in FIGS. 5 and 3 are shown;
FIG. 6 is a frequency response curve for different coil operation;
FIG. 7, a schematic diagram of different excitation coil and resonant coil positions;
FIG. 8 is a schematic diagram of different excitation coils and resonant coil positions;
FIG. 9, a schematic diagram of different excitation coil and resonant coil positions;
FIG. 10, a schematic diagram of different excitation coil and resonant coil positions;
FIG. 11, a schematic diagram of different excitation coil and resonant coil positions;
FIG. 12, a schematic diagram of different excitation coil and resonant coil positions;
FIG. 13, a schematic diagram of different excitation coil and resonant coil positions;
FIG. 14, a schematic diagram of different excitation coil and resonant coil positions;
FIG. 15, a schematic diagram of different excitation coil and resonant coil positions;
FIG. 16, a schematic of a charger circuit;
Fig. 17 is a schematic circuit diagram of a device to be charged corresponding to the charger.
Detailed Description
in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
on the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.
Example 1
a radio transmission system comprising a transmitting section and a receiving section, the transmitting section including a transmitting coil and a transmitting resonance coil, the receiving section including a receiving coil and a receiving resonance coil; the transmitting coil and the transmitting resonance coil are in the same plane, the receiving coil and the receiving resonance coil are in the same plane, and the transmitting part and the receiving part realize electric transmission in a magnetic resonance mode. In the prior art, a resonance coil and an excitation coil (the excitation coil refers to a transmitting coil or a receiving coil) are formed by a group of coils on different planes on the same normal line. They are in a back and forth configuration with strong coupling when the two coils are relatively close together. It is often necessary to increase the distance between the two coils to reduce coupling. This is difficult to achieve in situations where space is relatively limited. As shown in fig. 1, the resonant coil and the exciting coil are arranged on the same plane, so that the direct coupling between the collars can be effectively reduced, and the problem of over-strong coupling between the two coils can be well solved. Namely, the independence of each coil is improved, and the transmitting system can be adjusted more conveniently, so that the effect of the whole system is better.
meanwhile, due to the fact that a certain coupling exists between the two coils, the traction effect of a circuit at the rear end on the receiving coil or the transmitting coil can be reduced, the Q value of the two coils is higher, and the capacity of capturing space energy is improved.
further, the number of the transmission resonant coils or the reception resonant coils is at least one, and the radiation direction of the radio transmission system can be controlled by controlling the turn-on of the transmission resonant coils or the reception resonant coils and each of the transmission resonant coils or each of the reception resonant coils. The direction of the radiation can be changed by selecting how much of the different coils are switched on or coupled. The electromagnetic wave is led to a larger amount in a desired direction by controlling the radiation direction. Less in the undesired direction. Thereby achieving the dual purposes of improving the performance and reducing the radiation to the human body. As shown in fig. 2, fig. 2 is a magnetic field intensity distribution diagram on a coil normal section, and two points can be seen from fig. 2: 1, the double-coil structure has more magnetic field components along the normal direction; 2, there is a pole in the normal direction of the exciting coil and the resonance coil. With respect to the single coil structure, the magnetic field component moves in the direction of the resonance coil. Thereby achieving the purpose of changing the radiation direction. To further illustrate how the multi-coil structure can be used to control radiation direction, fig. 3-5 were generated. Wherein fig. 3 is a structure of three parallel coils on the same plane. In fig. 3, the center coil is a transmitting coil, and the left and right sides are two resonance coils. Whether the corresponding resonance coil needs to work is selected by applying voltages to VC1 and VC2 respectively. Specifically, when a positive voltage is applied to VC1 or VC2, the diode D1 or D2 is turned on and the corresponding resonant coil operates. Fig. 4 and 5 are schematic diagrams of electromagnetic field strength in the plane of the three coil normals. In fig. 4, the radiation pattern of dark color region a is a radiation pattern when only the transmitting coil is operated and none of the resonance coils is operated; the pattern of the light B areas is the radiation pattern when all three coils are active. Comparing the dark color area A and the light color area B, it can be seen that when the three coils all work, the electromagnetic field along the normal direction of the transmitting coil is enhanced; the area away from normal falls off rapidly with increasing distance. That is, when there is a resonance coil and a transmission coil working together, the directivity of radiation is increased. Fig. 5 is used to show how the switching in of different resonance coils is selected to change the radiation pattern. In fig. 5, region P1 is the radiation pattern when a positive voltage is applied to terminal VC1 and no voltage is applied to terminal VC 2; region P2 is the radiation pattern when there is no voltage at terminal VC1 and a voltage at terminal VC 2. It can thus be seen that the radiation pattern can be controlled by selectively turning on different resonant coils.
Further, the self-resonance points of the transmitting coil, the transmitting resonant coil, the receiving resonant coil and the receiving coil may differ, which may vary according to the specific application, and generally does not exceed one tenth of the bandwidth. The self-resonance points of the two coils may be slightly different, thereby synthesizing a wide and wider frequency characteristic, as shown in fig. 6. In fig. 6, T1 is the frequency response curve for a single coil operating. We can see that either the response amplitude or both bandwidths are relatively limited. T2 also has properties similar to T1. Both bandwidth and amplitude are relatively limited. When the two coils are placed close together or in the same plane, a curve similar to T3 in the figure is formed. T3 is a curve synthesized from T1 and T2. Both amplitude and bandwidth are better than T1 or T2 alone. The resonance points of T1 and T2 were adjusted appropriately. The characteristics of T3 can be controlled. T3 may be made to exhibit one or two peaks.
further, the shape of the transmitting coil, the resonance coil, and the receiving coil is any one of a circle, an ellipse, or a polygon, or a combination of any two or more thereof. At the same time, the coupling between the coils is small due to the parallel arrangement. Making the implementation of multiple resonance coils easier and more flexible. Even a profiled configuration can be made, as shown in fig. 7-15. In fig. 15, the excitation coil and the resonance coil are approximately in one plane.
Further, the distance between the transmitting part and the receiving part is. Depending on the application and the size of the transmitting and receiving coils. And may exceed 75 centimeters.
Further, the transmitting part is configured on the charging device; the receiving unit is disposed in a device having a rechargeable battery mounted thereon.
A radio transmission system application apparatus using any one of the above radio transmission systems, the radio transmission system application apparatus comprising a charger and a device to be charged corresponding to the charger, the transmitting coil and the transmitting resonance coil of the charger being in a same plane, and the receiving coil and the receiving resonance coil of the device to be charged corresponding to the charger being in a same plane.
Further, the charger further comprises a power control circuit 202, a first communication circuit 203, a power supply 204, a first MCU207, a power frequency driver and an interface 205; the power frequency driver and interface 205 is connected to the transmit coil; the power supply receives direct current or alternating current and outputs stable working voltage to provide electric energy for the first MCU, the power frequency driver and the interface; the first MCU207 is directly connected to and monitors the power control circuit 202, the first communication circuit 203, the power source 204 and the power frequency driver and interface 205; the communication circuit ensures the communication with the equipment to be charged corresponding to the charger; the power control circuit 202 regulates the power fed to the transmit coil 206 by controlling the power frequency driver and interface 205. As shown in fig. 16.
Further, the device to be charged corresponding to the charger further includes an interface matching and controlling circuit 305, an energy storage element 308, a second MCU307, a second communication circuit 303, an executing mechanism 304, a human-computer interface 309, and an authentication end element 302; the interface matching and control circuit 305 is connected to the receive coil; the second MCU307 is directly connected to and monitors the interface matching and controlling circuit 305, the second communication circuit 303, the executing mechanism 304 and the authentication end element 302; wherein the function of the actuating mechanism is to open or close the electronic lock; the human-computer interface mainly refers to a keyboard, a touch screen, a display, a fingerprint recognizer and other biological recognizers; the function of the authentication end element is to judge whether the operated person is a legal user. The interface matching and control circuit 305 is connected to the energy storage element 308; the second communication circuit 303 realizes communication with the charger, as shown in fig. 17.
Claims (8)
1. A radio transmission system comprising a transmission section and a reception section, characterized in that the transmission section comprises a transmission coil and a transmission resonance coil, and the reception section comprises a reception coil and a reception resonance coil; the transmitting coil and the transmitting resonance coil are in the same plane or approximately in the same plane, the receiving coil and the receiving resonance coil are in the same plane or approximately in the same plane, and the transmitting part and the receiving part realize electric transmission in a magnetic resonance mode; the number of the transmitting resonance coils or the receiving resonance coils is at least one, and the radiation direction of the radio transmission system can be controlled by controlling the number of the transmitting resonance coils or the receiving resonance coils and the opening of each transmitting resonance coil or each receiving resonance coil;
the resonance coil and the excitation coil do not have an overlapped part;
the excitation coil refers to a transmitting coil or a receiving coil.
2. the radio transmission system according to claim 1, wherein self-resonance points of said transmission coil, said transmission resonance coil, said reception resonance coil and said reception coil may differ; the difference varies depending on the application and must not exceed one tenth of the bandwidth of the coil.
3. The radio transmission system according to claim 1, wherein the shape of the transmission coil, the resonance coil, and the reception coil is any one of a circle, an ellipse, or a polygon, or a combination of any two or more thereof.
4. A radio transmission system according to claim 1, wherein the distance between the transmitting part and the receiving part varies with the size of the transmitting coil and the receiving coil, and the distance can be up to 75 cm or more.
5. The radio transmission system according to any one of claims 1 to 4, wherein the transmitting section is provided to a charging device; the receiving unit is disposed in a device having a rechargeable battery mounted thereon.
6. A radio transmission system application apparatus using the radio transmission system according to any one of claims 1 to 5, the radio transmission system application apparatus comprising a charger and a device to be charged corresponding to the charger; the transmitting coil and the transmitting resonance coil of the charger are on the same plane or approximately on the same plane, and the receiving coil and the receiving resonance coil of the equipment to be charged corresponding to the charger are on the same plane or approximately on the same plane; the number of the transmitting resonance coils or the receiving resonance coils is at least one, and the radiation direction of the radio transmission system can be controlled by controlling the number of the transmitting resonance coils or the receiving resonance coils and the opening of each transmitting resonance coil or each receiving resonance coil;
The resonance coil and the excitation coil do not have an overlapped part;
the excitation coil refers to a transmitting coil or a receiving coil.
7. The radio transmission system application apparatus according to claim 6, wherein the charger further comprises a power control circuit (202), a first communication circuit (203), a power supply (204), a first MCU (207), a power frequency driver and an interface (205); the power frequency driver and interface (205) is connected with the transmit coil; the power supply receives direct current or alternating current and outputs stable working voltage to provide electric energy for the first MCU (207) and the power frequency driver and interface (205); the first MCU (207) is directly connected with and monitors the power control circuit (202), the first communication circuit (203), the power supply (204) and the power frequency driver and interface (205); the first communication circuit ensures communication between the charger and the equipment to be charged; the power control circuit (202) regulates the power fed to the transmit coil (206) by controlling the power frequency driver and interface (205).
8. The radio transmission system application apparatus according to claim 6, wherein the device to be charged corresponding to the charger further comprises an interface matching and control circuit (305), an energy storage element (308), a second MCU (307), a second communication circuit (303), an actuator (304), a man-machine interface (309), and an authentication end element (302); wherein the function of the actuating mechanism is to turn on or off the device to be charged; the human-computer interface mainly refers to a biological recognizer and comprises a keyboard, a touch screen, a display and a fingerprint recognizer; the function of the authentication end member is to judge whether the operated personnel is a legal user; the interface matching and control circuit (305) is connected to the receiving coil; the second MCU (307) is directly connected with and monitors the interface matching and control circuit (305), the second communication circuit (303), the execution mechanism (304) and the authentication end member (302); the interface matching and control circuit (305) is connected with the energy storage element (308); the second communication circuit (303) is in communication with the charger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610888900.3A CN106385072B (en) | 2016-10-11 | 2016-10-11 | Radio transmission system and application device thereof |
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| CN201610888900.3A CN106385072B (en) | 2016-10-11 | 2016-10-11 | Radio transmission system and application device thereof |
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| CN106385072A CN106385072A (en) | 2017-02-08 |
| CN106385072B true CN106385072B (en) | 2019-12-06 |
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| CN108390464B (en) * | 2018-03-14 | 2020-02-14 | 南京航空航天大学 | Flexible traveling wave excitation method of non-contact electric energy transmission device |
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| CN103620712A (en) * | 2011-06-30 | 2014-03-05 | 丰田自动车株式会社 | Power transmitting device, power receiving device, and power transmission system |
| CN104253491A (en) * | 2013-06-25 | 2014-12-31 | 瑞萨电子株式会社 | Electric power transmitting device, non-contact power supply system, and control method |
| CN105765828A (en) * | 2013-08-06 | 2016-07-13 | 动量动力学公司 | A method of and apparatus for detecting coil alignment error in wireless inductive power transmission |
| CN105846539A (en) * | 2015-01-28 | 2016-08-10 | 日本电产三协株式会社 | Electronic locking system |
| CN206524637U (en) * | 2016-10-11 | 2017-09-26 | 赵莹 | A kind of radio transmission system and its application apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6547239B2 (en) * | 2014-05-14 | 2019-07-24 | Tdk株式会社 | Flat coil unit |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103620712A (en) * | 2011-06-30 | 2014-03-05 | 丰田自动车株式会社 | Power transmitting device, power receiving device, and power transmission system |
| CN104253491A (en) * | 2013-06-25 | 2014-12-31 | 瑞萨电子株式会社 | Electric power transmitting device, non-contact power supply system, and control method |
| CN105765828A (en) * | 2013-08-06 | 2016-07-13 | 动量动力学公司 | A method of and apparatus for detecting coil alignment error in wireless inductive power transmission |
| CN105846539A (en) * | 2015-01-28 | 2016-08-10 | 日本电产三协株式会社 | Electronic locking system |
| CN206524637U (en) * | 2016-10-11 | 2017-09-26 | 赵莹 | A kind of radio transmission system and its application apparatus |
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