CN106487105A - A kind of magnet coupled resonant type wireless power transfer of modified line coil structures - Google Patents
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Abstract
本发明公开了一种变线圈结构的磁耦合谐振式无线电能传输装置，包括直流电源依次连接有高频逆变电路、变线圈结构谐振耦合部分、高频整流电路、逆变电路及其负载；其中所述变线圈结构谐振耦合部分分别设置有两线圈结构和四线圈结构的无线连接，两线圈结构谐振耦合部分中设有发射线圈和接收线圈为谐振线圈，当谐振线圈以相同的频率振荡时，通过耦合将能量传输至接收线圈，实现无线电能传输；四线圈结构谐振耦合部分中设有驱动谐振线圈、发射线圈、接收线圈和负载谐振线圈为谐振线圈，当谐振线圈以相同的频率振荡时，通过电磁耦合将能量传输至负载线圈，实现无线电能传输；并通过在不同传输距离采用不同线圈结构，使无线电能传输装置传输效率达到最大化。
The invention discloses a magnetically coupled resonant wireless power transmission device with a variable coil structure, which comprises a DC power supply connected in sequence with a high-frequency inverter circuit, a resonant coupling part with a variable coil structure, a high-frequency rectifier circuit, an inverter circuit and its load; Wherein, the resonant coupling part of the variable coil structure is respectively provided with a wireless connection of a two-coil structure and a four-coil structure, and the resonant coupling part of the two-coil structure is provided with a transmitting coil and a receiving coil as a resonant coil. When the resonant coil oscillates at the same frequency , through coupling, the energy is transmitted to the receiving coil to realize wireless energy transmission; the four-coil structure resonant coupling part is equipped with a driving resonant coil, a transmitting coil, a receiving coil and a load resonant coil as resonant coils. When the resonant coils oscillate at the same frequency , the energy is transmitted to the load coil through electromagnetic coupling to realize wireless power transmission; and by using different coil structures at different transmission distances, the transmission efficiency of the wireless power transmission device is maximized.
Description
技术领域technical field
本发明涉及一种无线电能传输装置，尤其是一种变线圈结构的磁耦合谐振式无线电能传输装置。The invention relates to a wireless power transmission device, in particular to a magnetic coupling resonant wireless power transmission device with variable coil structure.
背景技术Background technique
随着无线电能传输技术的发展，越来越多的领域需要应用无线电能传输技术传输电能。目前的无线电能传输技术主要有三种，分别是磁感应耦合方式、磁耦合谐振方式和微波辐射方式。对于小功率无线电能传输的应用，相比于磁感应耦合方式，磁耦合谐振方式具有较长的有效传输距离，而与微波辐射方式相比，具有更高的传输效率。虽然磁耦合谐振方式有以上的优点，但是其传输效率会随着距离的变化而变化，无法始终保持在很高的水平。With the development of wireless power transmission technology, more and more fields need to apply wireless power transmission technology to transmit electric energy. There are three main types of wireless power transmission technologies at present, namely, magnetic induction coupling, magnetic coupling resonance and microwave radiation. For the application of low-power wireless power transmission, compared with the magnetic induction coupling method, the magnetic coupling resonance method has a longer effective transmission distance, and compared with the microwave radiation method, it has higher transmission efficiency. Although the magnetic coupling resonance method has the above advantages, its transmission efficiency will vary with the distance and cannot always be maintained at a high level.
理论分析和实验证明，基于磁耦合谐振式无线电能传输技术的无线电能传输装置，根据线圈结构的不同，其传输效率随传输距离的变化趋势也不同。Theoretical analysis and experiments prove that the transmission efficiency of the wireless power transmission device based on the magnetic coupling resonant wireless power transmission technology varies with the transmission distance according to the different coil structures.
两线圈结构的无线电能传输装置，其传输效率随传输距离的增大而减小；当传输距离大于线圈半径时，传输效率迅速减小。The transmission efficiency of the wireless power transmission device with the two-coil structure decreases with the increase of the transmission distance; when the transmission distance is greater than the coil radius, the transmission efficiency decreases rapidly.
四线圈结构的无线电能传输装置，其传输效率在传输距离等于线圈半径时，达到最大值。当传输距离小于线圈半径时，传输效率随传输距离的增大而增大；当传输距离大于线圈半径、小于有效传输距离，有效传输距离的计算公式：时，传输效率随传输距离的增大而减小。The transmission efficiency of the four-coil structure wireless power transmission device reaches the maximum when the transmission distance is equal to the coil radius. When the transmission distance is smaller than the coil radius, the transmission efficiency increases with the increase of the transmission distance; when the transmission distance is greater than the coil radius and less than the effective transmission distance, the calculation formula of the effective transmission distance is: When , the transmission efficiency decreases with the increase of the transmission distance.
《基于磁耦合谐振的无线电能传输系统的研究》中所采用的两线圈结构，存在的问题是在无线传输距离小于线圈半径时，传输效率比较高，无线传输距离大于线圈半径，小于线圈直径时，传输效率较低，无线传输距离大于线圈直径，则传输效率基本为零。《双中继无线电能传输系统建模与传输效率分析》中采用的四线圈结构，存在的问题是在无线传输距离小于线圈半径时，传输效率较低，无线传输距离大于线圈时，传输效率明显升高。The problem with the two-coil structure used in "Research on Wireless Power Transmission System Based on Magnetic Coupling Resonance" is that when the wireless transmission distance is smaller than the coil radius, the transmission efficiency is relatively high, and the wireless transmission distance is greater than the coil radius and smaller than the coil diameter. , the transmission efficiency is low, and the wireless transmission distance is greater than the coil diameter, the transmission efficiency is basically zero. The four-coil structure used in "Double Relay Wireless Power Transmission System Modeling and Transmission Efficiency Analysis" has the problem that when the wireless transmission distance is smaller than the coil radius, the transmission efficiency is low, and when the wireless transmission distance is greater than the coil, the transmission efficiency is obvious raised.
发明内容Contents of the invention
针对现有两线圈结构和四线圈结构的磁耦合谐振式无线电能传输技术的上述缺陷，本发明提供一种变线圈结构的磁耦合谐振式无线电能传输装置。In view of the above-mentioned defects of the existing two-coil structure and four-coil structure magnetic coupling resonant wireless power transmission technology, the present invention provides a magnetic coupling resonant wireless power transmission device with variable coil structure.
为实现上述目的，本发明采取如下技术方案。In order to achieve the above object, the present invention adopts the following technical solutions.
一种变线圈结构的磁耦合谐振式无线电能传输装置，包括直流电源依次连接有高频逆变电路、变线圈结构谐振耦合部分、高频整流电路、逆变电路及其负载；其特征在于：所述变线圈结构谐振耦合部分分别设置有两线圈结构和四线圈结构的无线连接，两线圈结构谐振耦合部分中设有发射线圈和接收线圈为谐振线圈，当谐振线圈以相同的频率振荡时，通过耦合将能量传输至接收线圈，实现无线电能传输；四线圈结构谐振耦合部分中设有驱动谐振线圈、发射线圈、接收线圈和负载谐振线圈为谐振线圈，当谐振线圈以相同的频率振荡时，通过电磁耦合将能量传输至负载线圈，实现无线电能传输；并通过在不同传输距离采用不同线圈结构，使无线电能传输装置传输效率达到最大化。A magnetically coupled resonant wireless power transmission device with a variable coil structure, including a DC power supply connected in sequence with a high-frequency inverter circuit, a variable coil structure resonant coupling part, a high-frequency rectifier circuit, an inverter circuit and its load; it is characterized in that: The resonant coupling part of the variable coil structure is respectively provided with a wireless connection of a two-coil structure and a four-coil structure. The resonant coupling part of the two-coil structure is provided with a transmitting coil and a receiving coil as a resonant coil. When the resonant coil oscillates at the same frequency, The energy is transmitted to the receiving coil through coupling to realize wireless energy transmission; the resonant coupling part of the four-coil structure is equipped with a driving resonant coil, a transmitting coil, a receiving coil and a load resonant coil as resonant coils. When the resonant coils oscillate at the same frequency, The energy is transmitted to the load coil through electromagnetic coupling to realize wireless energy transmission; and by adopting different coil structures at different transmission distances, the transmission efficiency of the wireless energy transmission device is maximized.
所述高频逆变电路是依次由扼流电感、信号源、驱动芯片、开关管和并联电容连接构成；所述扼流电感是分别与直流电源输出端和开关管的输入端连接；所述信号源与驱动芯片输入端连接；所述开关管与驱动芯片输出端连接；所述并联电容与开关管并联连接。The high-frequency inverter circuit is sequentially composed of a choke inductor, a signal source, a drive chip, a switch tube, and a parallel capacitor; the choke inductor is respectively connected to the output end of the DC power supply and the input end of the switch tube; the The signal source is connected to the input end of the drive chip; the switch tube is connected to the output end of the drive chip; the parallel capacitor is connected in parallel to the switch tube.
所述变线圈结构谐振耦合部分是由两线圈结构和四线圈结构两部分集成；两线圈结构谐振耦合部分是由发射回路和接收回路集成，发射回路和接收回路无线连接；所述发射回路包括发射线圈和谐振电容组；所述发射线圈和电容组串联连接；所述接收回路是由接收线圈和谐振电容串联连接而构成；The resonant coupling part of the variable coil structure is integrated by two parts of the two-coil structure and the four-coil structure; the resonant coupling part of the two-coil structure is integrated by the transmitting loop and the receiving loop, and the transmitting loop and the receiving loop are wirelessly connected; the transmitting loop includes a transmitting loop A coil and a resonant capacitor group; the transmitting coil and the capacitor group are connected in series; the receiving circuit is formed by connecting the receiving coil and the resonant capacitor in series;
四线圈结构谐振耦合部分是由驱动谐振回路、发射回路、接收回路和负载谐振回路连接构成；所述驱动谐振回路和发射回路无线连接，发射回路和接收回路无线连接，接收回路和负载回路无线连接；所述驱动谐振回路包括驱动线圈和谐振电容，所述驱动线圈和谐振电容串联连接，所述发射回路由发射线圈和谐振电容串联连接而构成，所述接收回路包括接收线圈和谐振电容，所述接收线圈和谐振电容串联连接，所述负载谐振回路由负载线圈和谐振电容串联连接而构成。The resonant coupling part of the four-coil structure is composed of a driving resonant circuit, a transmitting circuit, a receiving circuit and a load resonant circuit; the driving resonant circuit is connected to the transmitting circuit wirelessly, the transmitting circuit is connected to the receiving circuit wirelessly, and the receiving circuit is connected to the load circuit wirelessly. The driving resonance circuit includes a driving coil and a resonance capacitor, the driving coil and the resonance capacitor are connected in series, the transmitting circuit is formed by connecting the transmitting coil and the resonance capacitor in series, and the receiving circuit includes a receiving coil and a resonance capacitor, so The receiving coil and the resonant capacitor are connected in series, and the load resonant circuit is formed by connecting the load coil and the resonant capacitor in series.
所述高频整流电路由升压电感、不控整流电路和滤波电容组成；所述升压电感与不控整流电路的输入端连接；所述滤波电容与不控整流电路并联连接；所述不控整流电路由四个肖特基二极管组成。The high-frequency rectifier circuit is composed of a boost inductor, an uncontrolled rectifier circuit and a filter capacitor; the boost inductor is connected to the input end of the uncontrolled rectifier circuit; the filter capacitor is connected in parallel with the uncontrolled rectifier circuit; the uncontrolled rectifier circuit is connected in parallel; The controlled rectification circuit consists of four Schottky diodes.
所述逆变电路是由升压电感、全桥逆变电路连接构成；所述升压电感与全桥逆变电路的输入端连接；所述全桥逆变电路包括四个MOSFET管和四个二极管，每个MOSFET管分别与一个二极管反并联连接。The inverter circuit is composed of a boost inductor connected to a full-bridge inverter circuit; the boost inductor is connected to the input end of the full-bridge inverter circuit; the full-bridge inverter circuit includes four MOSFET tubes and four Diodes, each MOSFET tube is connected in antiparallel with a diode.
所述负载是纯电阻负载，或是阻抗负载。The load is a purely resistive load, or an impedance load.
所述无线电能传输装置对于两线圈结构而言，无线电能传输距离为发射线圈和接收线圈之间的距离；对于四线圈结构而言，无线电能传输距离为驱动谐振线圈和负载线圈之间的距离；无线电能传输距离小于线圈半径时，采用两线圈结构的磁耦合谐振式无线电能传输装置。无线电能传输距离大于线圈半径、小于有效传输距离时，采用四线圈结构的磁耦合谐振式无线电能传输装置。For the two-coil structure of the wireless power transmission device, the wireless power transmission distance is the distance between the transmitting coil and the receiving coil; for the four-coil structure, the wireless power transmission distance is the distance between the driving resonant coil and the load coil ; When the wireless power transmission distance is smaller than the coil radius, a magnetically coupled resonant wireless power transmission device with a two-coil structure is used. When the wireless power transmission distance is greater than the coil radius but less than the effective transmission distance, a magnetically coupled resonant wireless power transmission device with a four-coil structure is used.
本发明上述所提供的一种变线圈结构的磁耦合谐振式无线电能传输装置，分别设置有两线圈结构谐振耦合部分和四线圈结构谐振耦合部分的无线连接，两线圈结构谐振耦合部分中设有发射线圈和接收线圈为谐振线圈，当谐振线圈以相同的频率振荡时，通过耦合将能量传输至接收线圈，实现无线电能传输；四线圈结构谐振耦合部分中设有驱动谐振线圈、发射线圈、接收线圈和负载谐振线圈为谐振线圈，当谐振线圈以相同的频率振荡时，通过电磁耦合将能量传输至负载线圈，实现无线电能传输；当无线电能传输距离小于线圈半径时，采用两线圈结构的磁耦合谐振式无线电能传输装置；当无线电能传输距离大于线圈半径、小于有效传输距离时，采用四线圈结构的磁耦合谐振式无线电能传输装置，通过在不同传输距离采用不同线圈结构，使无线电能传输装置传输效率达到最大化。The above-mentioned magnetically coupled resonant wireless power transmission device with variable coil structure provided by the present invention is respectively provided with the wireless connection of the two-coil structure resonant coupling part and the four-coil structure resonant coupling part, and the two-coil structure resonant coupling part is provided with The transmitting coil and the receiving coil are resonant coils. When the resonant coil oscillates at the same frequency, the energy is transmitted to the receiving coil through coupling to realize wireless energy transmission; the resonant coupling part of the four-coil structure is equipped with a driving resonant coil, a transmitting coil, a receiving The coil and the load resonant coil are resonant coils. When the resonant coil oscillates at the same frequency, the energy is transmitted to the load coil through electromagnetic coupling to realize wireless power transmission; Coupling resonant wireless power transmission device; when the wireless power transmission distance is greater than the coil radius and less than the effective transmission distance, a magnetically coupled resonant wireless power transmission device with a four-coil structure is adopted, and different coil structures are used at different transmission distances. The transmission efficiency of the transmission device is maximized.
本发明装置电路结构简单，实现容易，成本低，运行稳定可靠，具有很高的使用价值和经济效应。The device of the invention has simple circuit structure, easy realization, low cost, stable and reliable operation, high use value and economic effect.
附图说明Description of drawings
图1是本发明装置原理结构框图。Fig. 1 is a block diagram of the principle structure of the device of the present invention.
图2是本发明装置原理结构电路图。Fig. 2 is a circuit diagram of the principle structure of the device of the present invention.
图3是本发明两线圈原理结构电路图。Fig. 3 is a circuit diagram of the principle structure of the two coils of the present invention.
图4是本发明四线圈原理结构电路图。Fig. 4 is a circuit diagram of the principle structure of four coils of the present invention.
图5是本发明高频逆变电路驱动与开关原理结构电路图。Fig. 5 is a schematic structural circuit diagram of the driving and switching principle of the high-frequency inverter circuit of the present invention.
具体实施方式detailed description
以下结合附图对本发明的具体实施例作出进一步的说明。The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
实施一种变线圈结构的磁耦合谐振式无线电能传输装置，所述无线电能传输装置包括磁耦合谐振式无线电能传输装置由直流电源，高频逆变电路，变线圈结构谐振耦合部分，高频整流电路、逆变电路和负载组成。Implement a magnetically coupled resonant wireless power transmission device with a variable coil structure, the wireless power transmission device includes a magnetically coupled resonant wireless power transmission device consisting of a DC power supply, a high-frequency inverter circuit, a variable coil structure resonant coupling part, and a high-frequency Composed of rectifier circuit, inverter circuit and load.
所述直流电源与高频逆变电路输入端连接，所述变线圈结构谐振耦合部分输入端与高频逆变电路输出端连接，所述变线圈结构谐振耦合部分输出端与高频整流电路输入端连接，所述高频整流电路输出端与逆变电路输入端连接。The DC power supply is connected to the input end of the high-frequency inverter circuit, the input end of the resonant coupling part of the variable coil structure is connected to the output end of the high-frequency inverter circuit, and the output end of the resonant coupling part of the variable coil structure is connected to the input end of the high-frequency rectifier circuit The terminal is connected, and the output terminal of the high frequency rectification circuit is connected with the input terminal of the inverter circuit.
所述高频逆变电路如原理结构附图1所示，由扼流电感、信号源、驱动芯片、开关管和并联电容组成；所述扼流电感分别与直流电源输出端和开关管的源极连接，所述信号源与驱动芯片输入端连接，所述开关管与驱动芯片输出端连接，采用UCC37325作为驱动芯片驱动开关管MOSFET，如原理结构附图4所示，采用适用于N沟道MOSFET的B通道，其B通道输出端通过限流稳压模块与MOSFET开关管栅极连接，所述并联电容与开关管的源极漏极并联连接，使得开关管满足软开关工作条件，并联电容分别与两线圈结构中的发射回路以及四线圈结构中的驱动回路并联，从而将直流电转变成高频交流电，为下一阶段做准备。The high-frequency inverter circuit is composed of a choke inductance, a signal source, a driver chip, a switch tube, and a parallel capacitor as shown in Figure 1 of the principle structure; pole connection, the signal source is connected to the input terminal of the driver chip, and the switch tube is connected to the output terminal of the driver chip. UCC37325 is used as the driver chip to drive the switch tube MOSFET, as shown in Figure 4 of the principle structure. The B channel of the MOSFET, its B channel output terminal is connected to the gate of the MOSFET switch tube through the current limiting and voltage stabilizing module, and the parallel capacitor is connected in parallel with the source drain of the switch tube, so that the switch tube meets the soft switching working conditions, and the parallel capacitor They are respectively connected in parallel with the transmitting circuit in the two-coil structure and the driving circuit in the four-coil structure, so as to convert the direct current into high-frequency alternating current and prepare for the next stage.
所述谐振耦合部分如原理结构附图2、附图3和附图4所示，由两线圈结构谐振耦合部分和四线圈结构谐振耦合部分两部分组成；The resonant coupling part, as shown in Figure 2, Figure 3 and Figure 4 of the principle structure, is composed of two parts: a resonant coupling part with a two-coil structure and a resonant coupling part with a four-coil structure;
两线圈结构谐振耦合部分由发射回路和接收回路组成，所述发射回路和接收回路无线连接；所述发射回路包括发射线圈和谐振电容组，所述发射线圈和谐振电容组串联连接，所述电容组由三个电容串联连接，所述接收回路由接收线圈和谐振电容串联连接而成；发射回路谐振电容和发射线圈组成的串联谐振回路产生谐振电压和谐振电流，接收回路接收线圈和谐振电容组成的串联谐振回路具有和发射回路相同的谐振频率，通过磁耦合谐振使能量从发射回路传递至接收回路，实现电能的无线传输；The resonant coupling part of the two-coil structure is composed of a transmitting loop and a receiving loop, and the transmitting loop and the receiving loop are wirelessly connected; the transmitting loop includes a transmitting coil and a resonant capacitor group, and the transmitting coil and the resonant capacitor group are connected in series, and the capacitor The group is connected in series by three capacitors, the receiving circuit is formed by connecting the receiving coil and the resonant capacitor in series; the series resonant circuit composed of the resonant capacitor of the transmitting circuit and the transmitting coil generates a resonant voltage and a resonant current, and the receiving circuit is composed of a receiving coil and a resonant capacitor The series resonant circuit has the same resonant frequency as the transmitting circuit, and the energy is transferred from the transmitting circuit to the receiving circuit through magnetic coupling resonance to realize the wireless transmission of electric energy;
四线圈结构谐振耦合部分由驱动谐振回路、发射回路、接收回路和负载谐振回路组成，所述驱动谐振回路和发射回路无线连接，发射回路和接收回路无线连接，接收回路和负载谐振回路无线连接；所述驱动谐振回路包括驱动线圈和谐振电容，所述驱动线圈和谐振电容串联连接，所述发射回路由发射线圈和谐振电容串联连接而成，所述接收回路包括接收线圈和谐振电容，所述接收线圈和谐振电容串联连接，所述负载谐振回路由负载线圈和谐振电容串联连接而成，驱动谐振回路谐振电容和驱动线圈组成的串联谐振回路产生谐振电压和谐振电流，发射回路谐振电容和发射线圈组成的串联谐振回路、接收回路接收线圈和谐振电容组成的串联谐振回路以及负载谐振回路负载线圈和谐振电容组成的串联谐振回路具有和驱动谐振回路相同的谐振频率，通过磁耦合谐振使能量从驱动谐振回路经过发射回路和接收回路传递至负载谐振回路，实现电能的无线传输，为下一步做准备。The resonant coupling part of the four-coil structure is composed of a driving resonant circuit, a transmitting circuit, a receiving circuit and a load resonant circuit, the driving resonant circuit is connected to the transmitting circuit wirelessly, the transmitting circuit is connected to the receiving circuit wirelessly, and the receiving circuit is connected to the load resonant circuit wirelessly; The driving resonant circuit includes a driving coil and a resonant capacitor, the driving coil and the resonant capacitor are connected in series, the transmitting circuit is formed by connecting a transmitting coil and a resonant capacitor in series, and the receiving circuit includes a receiving coil and a resonant capacitor, the The receiving coil and the resonant capacitor are connected in series, the load resonant circuit is formed by connecting the load coil and the resonant capacitor in series, the series resonant circuit composed of the resonant capacitor of the driving resonant circuit and the driving coil generates a resonant voltage and a resonant current, the resonant capacitor of the transmitting circuit and the transmitting The series resonant circuit composed of the coil, the series resonant circuit composed of the receiving coil and the resonant capacitor of the receiving circuit, and the series resonant circuit composed of the load coil and the resonant capacitor of the load resonant circuit have the same resonant frequency as the driving resonant circuit, and the energy is transferred from The drive resonant circuit is transmitted to the load resonant circuit through the transmitting circuit and the receiving circuit to realize the wireless transmission of electric energy and prepare for the next step.
高频整流电路如原理结构附图2所示，由升压电感、不控整流电路和滤波电容组成；所述升压电感与不控整流电路的输入端连接，所述滤波电容与不控整流电路并联连接；所述不控整流电路由四个肖特基二极管构成整流桥，经过由肖特基二极管组成的不控整流电路将无线传输得到的高频交流电转变成直流电，为下一阶段做准备。The high-frequency rectification circuit, as shown in Figure 2 of the principle structure, is composed of a boost inductor, an uncontrolled rectifier circuit and a filter capacitor; the boost inductor is connected to the input end of the uncontrolled rectifier circuit, and the filter capacitor is connected to the uncontrolled rectifier circuit The circuits are connected in parallel; the uncontrolled rectification circuit is composed of four Schottky diodes to form a rectifier bridge, and the high-frequency alternating current obtained by wireless transmission is converted into direct current through the uncontrolled rectification circuit composed of Schottky diodes, which is used for the next stage. Prepare.
逆变电路如原理结构附图2所示，由升压电感、全桥逆变电路组成；所述升压电感与全桥逆变电路的输入端连接；所述全桥逆变电路包括四个MOSFET管和四个二极管，每个MOSFET管分别与一个二极管反并联连接，经过由MOSFET管和反并联二极管组成的全桥逆变电路将直流电转变成工频交流电，进一步连接任何工频负载。As shown in Figure 2 of the principle structure, the inverter circuit is composed of a boost inductor and a full-bridge inverter circuit; the boost inductor is connected to the input end of the full-bridge inverter circuit; the full-bridge inverter circuit includes four MOSFET tube and four diodes, each MOSFET tube is connected in anti-parallel with a diode, through the full-bridge inverter circuit composed of MOSFET tube and anti-parallel diode, the DC power is converted into power frequency AC power, and any power frequency load is further connected.
在上述具体实施方案中，实现一种不同线圈结构的磁耦合谐振式无线电能传输装置的具体工作方案包括以下步骤。In the above specific embodiments, a specific working solution for realizing a magnetically coupled resonant wireless power transmission device with different coil structures includes the following steps.
1）当无线电能传输距离小于线圈半径时，耦合谐振部分采用两线圈结构。具体方法为：开关S1合到a端，a＇端与a＇＇端连接，g1端与g1 ＇端连接，c端与c＇端连接，g2端与g2 ＇端连接。1) When the wireless energy transmission distance is smaller than the coil radius, the coupling resonance part adopts a two-coil structure. The specific method is as follows: switch S1 is connected to terminal a , terminal a ' is connected to terminal a ' ' , terminal g1 is connected to terminal g1 ' , terminal c is connected to terminal c ' , terminal g2 is connected to terminal g2 ' .
2）当无线电能传输距离大于线圈半径时，耦合谐振部分采用四线圈结构。具体方法为：开关S1合到b端，b＇端与b＇＇端连接，g1端与g1 ＇＇端连接，d端与d＇端连接，g2端与g2 ＇＇端连接。2) When the wireless energy transmission distance is greater than the coil radius, the coupling resonance part adopts a four-coil structure. The specific method is as follows: switch S1 is connected to terminal b, terminal b ' is connected to terminal b ' ' , terminal g1 is connected to terminal g1 ' ' , terminal d is connected to terminal d ' , terminal g2 is connected to terminal g2 '' connect.
通过在不同传输距离采用不同线圈结构，使无线电能传输装置传输效率达到最大化。By adopting different coil structures at different transmission distances, the transmission efficiency of the wireless power transmission device is maximized.
本发明装置电路结构简单，实现容易，成本低，运行稳定可靠，具有很高的使用价值和经济效应。The device of the invention has simple circuit structure, easy realization, low cost, stable and reliable operation, high use value and economic effect.
上述实施例仅为本发明的优选实施例，并非对本发明保护范围的限制，但凡采用本发明的设计原理，以及在此基础上进行非创作型劳动而作出的变化，均应属于本发明的保护范围之内。The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. However, all changes made by adopting the design principle of the present invention and performing non-creative labor on this basis shall belong to the protection of the present invention. within range.
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