技术领域Technical Field
本发明涉及无线能量信息并行传输技术领域，尤其涉及一种基于双极性线圈的多中继无线能量信息并行传输系统。The present invention relates to the technical field of wireless energy information parallel transmission, and in particular to a multi-relay wireless energy information parallel transmission system based on bipolar coils.
背景技术Background Art
为全天候实时监测电力系统的运行状况，大量的在线健康监测设备被广泛部署在高压电力网络中，成为现代智能电网建设的基石。理想的在线健康监测设备应能全天候不间断运行，无需人工维护工作，因此稳定的电源和可靠的数据传输方式成为在线监测系统发展的迫切要求。目前，电流互感器与无线电能传输系统的结合成为一个可行的选择，其在高压侧采集磁能，然后通过多中继线圈无线电能传输系统实现数米级别的电能传输，为低压侧的在线健康监测设备供电。与此同时，为实现实时输出功率调节和检测信息反馈，构建系统发射端和接收端之间的高数据率通信对于无线电能传输系统至关重要。In order to monitor the operation status of the power system in real time around the clock, a large number of online health monitoring devices are widely deployed in high-voltage power networks, becoming the cornerstone of modern smart grid construction. Ideal online health monitoring equipment should be able to operate uninterruptedly around the clock without manual maintenance, so stable power supply and reliable data transmission methods have become urgent requirements for the development of online monitoring systems. At present, the combination of current transformers and wireless power transmission systems has become a feasible option. It collects magnetic energy on the high-voltage side and then transmits power at the meter level through a multi-relay coil wireless power transmission system to power the online health monitoring equipment on the low-voltage side. At the same time, in order to achieve real-time output power regulation and detection information feedback, it is crucial for wireless power transmission systems to build high data rate communications between the transmitter and receiver of the system.
现有方案多采用独立的信息传输通道和能量传输通道，如申请号202110730299.6所公开的方案《多中继无线能量及数据协同传输系统》所示，但这种方案采用了较多线圈，增加了系统成本和体积，特别是增加了在线健康监测设备的体积和重量，增大了损耗。Most existing solutions use independent information transmission channels and energy transmission channels, as shown in the solution "Multi-relay wireless energy and data collaborative transmission system" disclosed in application number 202110730299.6. However, this solution uses more coils, which increases the system cost and volume, especially increases the volume and weight of online health monitoring equipment, and increases losses.
目前还有的方案仅用一条传输通道实现了信息和能量的并行传输，如申请号202010895860.1所公开的方案《基于双侧LCC的全双工WPT能量信号并行传输系统》所示，但这种方案没有考虑中继线圈，且采用了较多的阻波网络，系统的谐振特性较为复杂，系统的不稳定性增加。At present, there are still some schemes that use only one transmission channel to achieve parallel transmission of information and energy, such as the scheme "Full-duplex WPT energy signal parallel transmission system based on double-sided LCC" disclosed in application number 202010895860.1. However, this scheme does not take into account the relay coil and adopts more wave-blocking networks. The resonant characteristics of the system are more complicated and the instability of the system is increased.
发明内容Summary of the invention
本发明提供一种基于双极性线圈的多中继无线能量信息并行传输系统，解决的技术问题在于：如何在不新增线圈和阻波网络的前提条件下，通过多中继线圈实现数米级别的无线能量信息并行传输，且不影响高效能量传输与平稳功率输出。The present invention provides a multi-relay wireless energy information parallel transmission system based on bipolar coils, and solves the technical problem of how to achieve multi-meter-level wireless energy information parallel transmission through multiple relay coils without adding new coils and wave blocking networks, and without affecting efficient energy transmission and stable power output.
为解决以上技术问题，本发明提供一种基于双极性线圈的多中继无线能量信息并行传输系统，设有位于能量发射侧的能量发射线圈，位于能量接收侧的能量接收线圈，以及位于所述能量发射侧与所述能量接收侧之间的N个中继并行传输线圈，N≥1；In order to solve the above technical problems, the present invention provides a multi-relay wireless energy information parallel transmission system based on a bipolar coil, which is provided with an energy transmitting coil located at an energy transmitting side, an energy receiving coil located at an energy receiving side, and N relay parallel transmission coils located between the energy transmitting side and the energy receiving side, where N≥1;
所述能量发射线圈、所述能量接收线圈和所述中继并行传输线圈均采用相同的双极性线圈，所述双极性线圈包括两个大小、材质、线径、绕制方向均相同的同极性平面线圈L1和L2，线圈L1与线圈L2串联连接，其连接端口为T3，线圈L1的独立端口为T1，线圈L2的独立端口为T2；The energy transmitting coil, the energy receiving coil and the relay parallel transmission coil all use the same bipolar coil, which includes two planar coilsL1 andL2 of the same polarity with the same size, material, wire diameter and winding direction. The coilL1 is connected in series with the coilL2 , and its connection port isT3 . The independent port of the coilL1 isT1 , and the independent port of the coilL2 isT2 .
能量传输时，能量电流遵循从所述能量发射线圈的端口T1注入，从端口T2流出；During energy transmission, the energy current is injected from the portT1 of the energy transmitting coil and flows out from the portT2 ;
信息传输时，信息电流遵循同时从所述能量发射线圈或所述能量接收线圈的端口T1和端口T2注入，并从对应的端口T3流出。During information transmission, the information current is injected from the portT1 and the portT2 of the energy transmitting coil or the energy receiving coil at the same time, and flows out from the corresponding portT3 .
优选的，N个所述中继并行传输线圈具有N个线圈L1和N个线圈L2，分别记为线圈L11,L21,…,LN1、线圈L12,L22,…,LN2，线圈Lj1并联有补偿电容CDj1，线圈Lj2并联有补偿电容CDj2，串联的线圈Lj1与线圈Lj2并联有补偿电容CPj，j＝1,2,...,N；Preferably, the N relay parallel transmission coils have N coilsL1 and N coilsL2 , which are respectively recorded as coilsL11 ,L21 , ...,LN1 , coilsL12 ,L22 , ...,LN2 , coilsLj1 are connected in parallel with compensation capacitorsCDj1 , coilsLj2 are connected in parallel with compensation capacitorsCDj2 , and the series-connected coilsLj1 andLj2 are connected in parallel with compensation capacitorsCPj , j = 1, 2, ..., N;
信息传输时，补偿电容CDj1与线圈Lj1形成第一信息中继谐振环路，补偿电容CDj2与线圈Lj2形成第二信息中继谐振环路；During information transmission, the compensation capacitor CDj1 and the coil Lj1 form a first information relay resonant loop, and the compensation capacitor CDj2 and the coil Lj2 form a second information relay resonant loop;
能量传输时，补偿电容CPj、线圈Lj1和线圈Lj2形成能量中继谐振环路。During energy transmission, the compensation capacitor CPj , the coil Lj1 and the coil Lj2 form an energy relay resonant loop.
优选的，线圈Lj1、线圈Lj2、补偿电容CDj1、补偿电容CDj2的参数满足：Preferably, the parameters of the coil Lj1 , the coil Lj2 , the compensation capacitor CDj1 , and the compensation capacitor CDj2 satisfy:
Lj1＝Lj2,CDj1＝CDj2；Lj1 ＝Lj2 ,CDj1 ＝CDj2 ;
所述第一信息中继谐振环路的谐振频率满足：The resonant frequency of the first information relay resonant loop satisfies:
所述第二信息中继谐振环路的谐振频率满足：The resonant frequency of the second information relay resonant loop satisfies:
所述能量中继谐振环路的谐振频率满足：The resonant frequency of the energy relay resonant loop satisfies:
Mj1-j2表示线圈Lj1和Lj2之间的互感。Mj1-j2 represents the mutual inductance between the coils Lj1 and Lj2 .
优选的，所述能量发射线圈串联有的补偿电容CDT1和补偿电容CDT2，所述能量发射线圈的一端还通过补偿电容CPT连接高频逆变器的一端输出端，所述能量发射线圈的另一端连接所述高频逆变器的另一端输出端；Preferably, the energy transmitting coil is connected in series with a compensation capacitor CDT1 and a compensation capacitor CDT2 , one end of the energy transmitting coil is also connected to one output end of a high-frequency inverter through a compensation capacitor CPT , and the other end of the energy transmitting coil is connected to the other output end of the high-frequency inverter;
所述能量发射线圈具有的1个线圈L1和一个线圈L2分别记为线圈LT1和线圈LT2，在补偿电容CDT1和补偿电容CDT2的公共端与线圈LT1和线圈LT2的公共端之间连接有信息解调调制电路；The energy transmitting coil has a coilL1 and a coilL2 which are respectively denoted as coilLT1 and coilLT2 , and an information demodulation modulation circuit is connected between the common end of the compensation capacitor CDT1 and the compensation capacitor CDT2 and the common end of the coilLT1 and the coilLT2 ;
信息传输时，补偿电容CDT1与线圈LT1形成第一信息收发谐振线路，补偿电容CDT2与线圈LT2形成第二信息收发谐振线路；During information transmission, the compensation capacitor CDT1 and the coilLT1 form a first information transceiver resonant circuit, and the compensation capacitor CDT2 and the coilLT2 form a second information transceiver resonant circuit;
能量传输时，补偿电容CPT、线圈LT1和线圈LT2形成能量发射谐振线路。优选的，补偿电容CDT1、补偿电容CDT2、补偿电容CPT的参数满足：During energy transmission, the compensation capacitor CPT , the coilLT1 and the coilLT2 form an energy transmission resonant circuit. Preferably, the parameters of the compensation capacitor CDT1 , the compensation capacitor CDT2 and the compensation capacitor CPT satisfy:
CDT1＝CDT2＝CDj1＝CDj2,CPT＝CPj。CDT1 = CDT2 = CDj1 = CDj2 , CPT = CPj .
优选的，所述能量接收线圈并联有串联的补偿电容CDR1和补偿电容CDR2，所述能量接收线圈的一端还通过补偿电容CPR连接整流滤波电路的一端输出端，所述能量接收线圈的另一端连接所述整流滤波电路的另一端输出端；Preferably, the energy receiving coil is connected in parallel with a compensation capacitor CDR1 and a compensation capacitor CDR2 connected in series, one end of the energy receiving coil is also connected to one output end of a rectifier and filter circuit via a compensation capacitor CPR , and the other end of the energy receiving coil is connected to the other output end of the rectifier and filter circuit;
所述能量接收线圈具有的1个线圈L1和一个线圈L2分别记为线圈LR1和线圈LR2，在补偿电容CDR1和补偿电容CDR2的公共端与线圈LR1和线圈LR2的公共端之间连接有信息调制解调电路；The energy receiving coil has a coilL1 and a coilL2 which are respectively denoted as coilLR1 and coilLR2 , and an information modulation and demodulation circuit is connected between the common end of the compensation capacitorCDR1 and the compensation capacitorCDR2 and the common end of the coilLR1 and the coilLR2 ;
信息传输时，补偿电容CDR1与线圈LR1形成第一信息发收谐振线路，补偿电容CDR2与线圈LR2形成第二信息发收谐振线路；When information is transmitted, the compensation capacitor CDR1 and the coil LR1 form a first information transmission and reception resonant circuit, and the compensation capacitor CDR2 and the coil LR2 form a second information transmission and reception resonant circuit;
能量传输时，补偿电容CPR、线圈LR1和线圈LR2形成能量接收谐振线路。优选的，补偿电容CDR1、补偿电容CDR2、补偿电容CPR的参数满足：During energy transmission, the compensation capacitor CPR , the coilLR1 and the coilLR2 form an energy receiving resonant circuit. Preferably, the parameters of the compensation capacitor CDR1 , the compensation capacitor CDR2 and the compensation capacitor CPR satisfy:
CDR1＝CDR2＝CDj1＝CDj2,CPR＝CPj。CDR1 =CDR2 =CDj1 =CDj2 , CPR =CPj .
本发明提供的一种基于双极性线圈的多中继无线能量信息并行传输系统，整体包括能量传输通道和信息传输通道；The present invention provides a multi-relay wireless energy information parallel transmission system based on a bipolar coil, which as a whole includes an energy transmission channel and an information transmission channel;
所述能量传输通道包括能量发射端和能量接收端，所述能量发射端包括顺序连接的直流电源、所述高频逆变器、所述能量发射谐振线路，所述能量接收端包括顺序连接的所述能量接收谐振线路、所述整流滤波电路和负载；The energy transmission channel includes an energy transmitting end and an energy receiving end, the energy transmitting end includes a DC power supply, the high-frequency inverter, and the energy transmitting resonant circuit connected in sequence, and the energy receiving end includes the energy receiving resonant circuit, the rectifier filter circuit, and the load connected in sequence;
所述信息传输通道包括信息收发端和信息发收端，所述信息收发端包括顺序连接的所述信息解调调制电路、所述第一信息收发谐振线路和所述第二信息收发谐振线路，所述信息发收端包括顺序连接的所述信息调制解调电路、所述第一信息发收谐振线路和所述第二信息发收谐振线路；The information transmission channel includes an information transceiver end and an information transceiver end, the information transceiver end includes the information demodulation and modulation circuit, the first information transceiver resonant circuit and the second information transceiver resonant circuit connected in sequence, and the information transceiver end includes the information modulation and demodulation circuit, the first information transceiver resonant circuit and the second information transceiver resonant circuit connected in sequence;
当信息从能量接收侧向能量发射侧传输时，所述信息调制解调电路对需要传输的信息进行调制，由所述第一信息发收谐振线路、所述第二信息发收谐振线路和多个所述第一信息中继谐振环路、所述第二信息中继谐振环路和所述第一信息收发谐振线路、所述第二信息收发谐振线路逐级进行无线传输，最后由所述信息解调调制电路进行解调；When information is transmitted from the energy receiving side to the energy transmitting side, the information modulation and demodulation circuit modulates the information to be transmitted, and the first information transmitting and receiving resonant circuit, the second information transmitting and receiving resonant circuit and the plurality of the first information relaying resonant loops, the second information relaying resonant loops and the first information transmitting and receiving resonant circuit, and the second information transmitting and receiving resonant circuit perform wireless transmission step by step, and finally the information demodulation modulation circuit performs demodulation;
当信息从能量发射侧向能量接收侧传输时，所述信息解调调制电路对需要传输的信息进行调制，由所述第一信息收发谐振线路、所述第二信息收发谐振线路多个所述第一信息中继谐振环路、所述第二信息中继谐振环路和所述第一信息发收谐振线路、所述第二信息发收谐振线路逐级进行无线传输，最后由所述进行信息调制解调电路进行解调。When information is transmitted from the energy transmitting side to the energy receiving side, the information demodulation and modulation circuit modulates the information to be transmitted, and the first information transceiver resonant circuit, the second information transceiver resonant circuit, multiple first information relay resonant loops, the second information relay resonant loop, the first information transceiver resonant circuit, and the second information transceiver resonant circuit perform wireless transmission step by step, and finally the information modulation and demodulation circuit performs demodulation.
优选的，所述双极性线圈为圆环形，线圈L1与线圈L2为半圆环形。Preferably, the bipolar coil is in the shape of a circular ring, and the coilL1 and the coilL2 are in the shape of a semicircular ring.
本发明提供的一种基于双极性线圈的多中继无线能量信息并行传输系统，设计了特殊结构的双极性线圈，能量传输时，能量电流遵循从双极性线圈的端口T1注入，从端口T2流出；信息传输时，信息电流遵循同时从双极性线圈端口T1和端口T2注入，并从对应的端口T3流出。本系统将该双极性线圈应用在能量发射线圈、能量接收线圈和N个中继并行传输线圈上，从而利用双极性线圈的结构特性所带来的感应电压方向特性，设计了能量与信息的双频谐振器拓扑结构(将信息调制与解调电路注入发射与接收谐振器中)，避免了能量与信息电流谐振环路间的交叉干扰。本系统仅采用一组线圈(及相应的补偿电容)，无需设计阻波网络，整体占用空间小，结构简单，使用安全，能够在多中继线圈条件下保障能量与信息的远距离高效、高速、稳定传输。The present invention provides a multi-relay wireless energy information parallel transmission system based on a bipolar coil, which designs a bipolar coil of a special structure. During energy transmission, the energy current is injected from the portT1 of the bipolar coil and flows out from the portT2 ; during information transmission, the information current is injected from the portsT1 andT2 of the bipolar coil at the same time, and flows out from the corresponding portT3 . The system applies the bipolar coil to the energy transmitting coil, the energy receiving coil and N relay parallel transmission coils, thereby utilizing the induced voltage direction characteristics brought by the structural characteristics of the bipolar coil, and designs a dual-frequency resonator topology structure of energy and information (injecting the information modulation and demodulation circuit into the transmitting and receiving resonators), thereby avoiding cross interference between the energy and information current resonant loops. The system only uses one set of coils (and corresponding compensation capacitors), does not need to design a wave blocking network, occupies a small space as a whole, has a simple structure, is safe to use, and can ensure long-distance, efficient, high-speed and stable transmission of energy and information under the condition of multiple relay coils.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是本发明实施例提供的双极性线圈能量电流与磁场示意图；FIG1 is a schematic diagram of energy current and magnetic field of a bipolar coil provided by an embodiment of the present invention;
图2是本发明实施例提供的双极性线圈信息电流与磁场示意图；FIG2 is a schematic diagram of information current and magnetic field of a bipolar coil provided in an embodiment of the present invention;
图3是本发明实施例提供的基于双极性线圈的多中继无线能量信息并行传输系统的拓扑图；3 is a topological diagram of a multi-relay wireless energy information parallel transmission system based on a bipolar coil provided in an embodiment of the present invention;
图4是本发明实施例提供的双极性线圈能量与信息谐振环路结构图。FIG. 4 is a structural diagram of a bipolar coil energy and information resonant loop provided in an embodiment of the present invention.
具体实施方式DETAILED DESCRIPTION
下面结合附图具体阐明本发明的实施方式，实施例的给出仅仅是为了说明目的，并不能理解为对本发明的限定，包括附图仅供参考和说明使用，不构成对本发明专利保护范围的限制，因为在不脱离本发明精神和范围基础上，可以对本发明进行许多改变。The following specifically illustrates the implementation mode of the present invention in conjunction with the accompanying drawings. The embodiments are provided for illustrative purposes only and are not to be construed as limitations of the present invention. The accompanying drawings are provided for reference and illustration only and do not constitute limitations on the scope of patent protection of the present invention, because many changes may be made to the present invention without departing from the spirit and scope of the present invention.
本发明实施例提供一种基于双极性线圈的多中继无线能量信息并行传输系统，设有位于能量发射侧的能量发射线圈，位于能量接收侧的能量接收线圈，以及位于能量发射侧与能量接收侧之间的N个中继并行传输线圈，N≥1。在本实施例中，能量发射线圈、能量接收线圈和中继并行传输线圈均采用相同的双极性线圈，双极性线圈包括两个大小、材质、线径、绕制方向均相同的同极性平面线圈L1和L2，线圈L1与线圈L2串联连接，其连接端口为T3，线圈L1的独立端口为T1，线圈L2的独立端口为T2。根据法拉第定律，磁场极性与电流流动方向一致，因此能量电流与信息电流在双极性线圈中产生的感应电压极性相反。The embodiment of the present invention provides a multi-relay wireless energy information parallel transmission system based on a bipolar coil, which is provided with an energy transmitting coil located at the energy transmitting side, an energy receiving coil located at the energy receiving side, and N relay parallel transmission coils located between the energy transmitting side and the energy receiving side, where N≥1. In this embodiment, the energy transmitting coil, the energy receiving coil, and the relay parallel transmission coil all use the same bipolar coil, and the bipolar coil includes two planar coilsL1 andL2 of the same polarity with the same size, material, wire diameter, and winding direction. The coilL1 is connected in series with the coilL2 , and its connection port isT3 , the independent port of the coilL1 isT1 , and the independent port of the coilL2 isT2 . According to Faraday's law, the polarity of the magnetic field is consistent with the direction of current flow, so the polarity of the induced voltage generated by the energy current and the information current in the bipolar coil is opposite.
能量传输时，能量电流遵循从能量发射线圈的端口T1注入，从端口T2流出，如图1所示。根据法拉第定律，电流产生磁场极性与电流流动方向一致，因此能量电流在双极性线圈中产生的磁场φP-l和φP-r极性相同。During energy transmission, the energy current is injected from portT1 of the energy transmitting coil and flows out from portT2 , as shown in Figure 1. According to Faraday's law, the polarity of the magnetic field generated by the current is consistent with the direction of current flow, so the magnetic fields φPl and φPr generated by the energy current in the bipolar coil have the same polarity.
信息传输时，信息电流遵循同时从能量发射线圈或能量接收线圈的端口T1和端口T2注入，并从对应的端口T3流出，如图2所示。根据法拉第定律，电流产生磁场极性与电流流动方向一致，因此能量电流与信息电流在双极性线圈中产生的磁场φD-l和φD-r极性相反。During information transmission, the information current is injected from the portsT1 andT2 of the energy transmitting coil or the energy receiving coil at the same time, and flows out from the corresponding portT3 , as shown in Figure 2. According to Faraday's law, the polarity of the magnetic field generated by the current is consistent with the direction of the current flow, so the magnetic fields φD1 and φDr generated by the energy current and the information current in the bipolar coil are opposite in polarity.
作为一种优选的实施方式，如图1、图2所示，双极性线圈为圆环形，线圈L1与线圈L2为半圆环形，在半圆环形线圈的内侧中部设置成弧形过渡。本发明并不对双极性线圈的具体形状做严格限制，实际应用中根据具体需求而定。As a preferred embodiment, as shown in Figures 1 and 2, the bipolar coil is annular, the coilL1 and the coilL2 are semicircular, and an arc transition is arranged in the middle of the inner side of the semicircular coil. The present invention does not strictly limit the specific shape of the bipolar coil, and it is determined according to specific needs in actual applications.
基于双极性线圈的多中继无线能量信息并行传输系统的电路拓扑如图3所示，可以看到，N个中继并行传输线圈具有N个线圈L1和N个线圈L2，分别记为线圈L11,L21,…,LN1、线圈L12,L22,…,LN2，线圈Lj1并联有补偿电容CDj1，线圈Lj2并联有补偿电容CDj2，串联的线圈Lj1与线圈Lj2并联有补偿电容CPj，j＝1,2,...,N。The circuit topology of the multi-relay wireless energy information parallel transmission system based on bipolar coils is shown in Figure 3. It can be seen that the N relay parallel transmission coils have N coilsL1 and N coilsL2 , which are respectively recorded as coilsL11 ,L21 ,…,LN1 and coilsL12 ,L22 ,…,LN2 . The coilLj1 is connected in parallel with a compensation capacitorCDj1 , and the coilLj2 is connected in parallel with a compensation capacitorCDj2 . The series coilsLj1 andLj2 are connected in parallel with a compensation capacitorCPj , j=1,2,...,N.
信息传输时，补偿电容CDj1与线圈Lj1形成第一信息中继谐振环路，补偿电容CDj2与线圈Lj2形成第二信息中继谐振环路，只有极少量的能量电流通过补偿电容CDj1和CDj2。能量传输时，补偿电容CPj、线圈Lj1和线圈Lj2形成能量中继谐振环路，只有极少量的信息电流通过补偿电容CPj。以j＝1为例进行说明，对应的第一信息中继谐振环路、第二信息中继谐振环路、能量中继谐振环路如图4所示。During information transmission, the compensation capacitor CDj1 and the coil Lj1 form a first information relay resonant loop, and the compensation capacitor CDj2 and the coil Lj2 form a second information relay resonant loop, and only a very small amount of energy current passes through the compensation capacitors CDj1 and CDj2 . During energy transmission, the compensation capacitor CPj , the coil Lj1 and the coil Lj2 form an energy relay resonant loop, and only a very small amount of information current passes through the compensation capacitor CPj . Taking j=1 as an example for explanation, the corresponding first information relay resonant loop, the second information relay resonant loop, and the energy relay resonant loop are shown in FIG4 .
在本实施例中，线圈Lj1、线圈Lj2、补偿电容CDj1、补偿电容CDj2的参数满足：In this embodiment, the parameters of the coil Lj1 , the coil Lj2 , the compensation capacitor CDj1 , and the compensation capacitor CDj2 satisfy:
Lj1＝Lj2,CDj1＝CDj2；Lj1 ＝Lj2 ,CDj1 ＝CDj2 ;
第一信息中继谐振环路的谐振频率满足：The resonant frequency of the first information relay resonant loop satisfies:
第二信息中继谐振环路的谐振频率满足：The resonant frequency of the second information relay resonant loop satisfies:
能量中继谐振环路的谐振频率满足：The resonant frequency of the energy relay resonant loop satisfies:
Mj1-j2表示线圈Lj1和Lj2之间的互感。Mj1-j2 represents the mutual inductance between the coils Lj1 and Lj2 .
如图3所示，能量发射线圈串联有补偿电容CDT1和补偿电容CDT2，能量发射线圈的一端还通过补偿电容CPT连接高频逆变器的一端输出端，能量发射线圈的另一端连接高频逆变器的另一端输出端；As shown in FIG3 , the energy transmitting coil is connected in series with compensation capacitors CDT1 and CDT2 , one end of the energy transmitting coil is also connected to one output end of the high-frequency inverter through the compensation capacitor CPT , and the other end of the energy transmitting coil is connected to the other output end of the high-frequency inverter;
能量发射线圈具有的1个线圈L1和一个线圈L2分别记为线圈LT1和线圈LT2，在补偿电容CDT1和补偿电容CDT2的公共端与线圈LT1和线圈LT2的公共端之间连接有信息解调调制电路；The energy transmitting coil has a coilL1 and a coilL2 which are respectively denoted as coilLT1 and coilLT2 , and an information demodulation modulation circuit is connected between the common end of the compensation capacitor CDT1 and the compensation capacitor CDT2 and the common end of the coilLT1 and the coilLT2 ;
信息传输时，补偿电容CDT1与线圈LT1形成第一信息收发谐振线路，补偿电容CDT2与线圈LT2形成第二信息收发谐振线路；During information transmission, the compensation capacitor CDT1 and the coilLT1 form a first information transceiver resonant circuit, and the compensation capacitor CDT2 and the coilLT2 form a second information transceiver resonant circuit;
能量传输时，补偿电容CPT、线圈LT1和线圈LT2形成能量发射谐振线路。补偿电容CDT1、补偿电容CDT2、补偿电容CPT的参数满足：During energy transmission, the compensation capacitor CPT , the coilLT1 and the coilLT2 form an energy transmission resonant circuit. The parameters of the compensation capacitor CDT1 , the compensation capacitor CDT2 and the compensation capacitor CPT satisfy:
CDT1＝CDT2＝CDj1＝CDj2,CPT＝CPj。CDT1 = CDT2 = CDj1 = CDj2 , CPT = CPj .
如图3所示，能量接收线圈并联有串联的补偿电容CDR1和补偿电容CDR2，能量接收线圈的一端还通过补偿电容CPR连接整流滤波电路的一端输出端，能量接收线圈的另一端连接整流滤波电路的另一端输出端；As shown in FIG3 , the energy receiving coil is connected in parallel with a compensation capacitor CDR1 and a compensation capacitor CDR2 connected in series, one end of the energy receiving coil is also connected to one output end of the rectifier filter circuit through the compensation capacitor CPR , and the other end of the energy receiving coil is connected to the other output end of the rectifier filter circuit;
能量接收线圈具有的1个线圈L1和一个线圈L2分别记为线圈LR1和线圈LR2，在补偿电容CDR1和补偿电容CDR2的公共端与线圈LR1和线圈LR2的公共端之间连接有信息调制解调电路；The energy receiving coil has a coilL1 and a coilL2 which are respectively denoted as coil LR1 and coil LR2 , and an information modulation and demodulation circuit is connected between the common end of the compensation capacitor CDR1 and the compensation capacitor CDR2 and the common end of the coil LR1 and the coil LR2 ;
信息传输时，补偿电容CDR1与线圈LR1形成第一信息发收谐振线路，补偿电容CDR2与线圈LR2形成第二信息发收谐振线路；When information is transmitted, the compensation capacitor CDR1 and the coil LR1 form a first information transmission and reception resonant circuit, and the compensation capacitor CDR2 and the coil LR2 form a second information transmission and reception resonant circuit;
能量传输时，补偿电容CPR、线圈LR1和线圈LR2形成能量接收谐振线路。During energy transmission, the compensation capacitor CPR , the coilLR1 and the coilLR2 form an energy receiving resonant circuit.
补偿电容CDR1、补偿电容CDR2、补偿电容CPR的参数满足：The parameters of compensation capacitor CDR1 , compensation capacitor CDR2 , and compensation capacitor CPR satisfy:
CDR1＝CDR2＝CDj1＝CDj2,CPR＝CPj。CDR1 =CDR2 =CDj1 =CDj2 , CPR =CPj .
参考图3，基于双极性线圈的多中继无线能量信息并行传输系统包括能量传输通道和信息传输通道。3 , the multi-relay wireless energy information parallel transmission system based on bipolar coils includes an energy transmission channel and an information transmission channel.
能量传输通道包括能量发射端和能量接收端，能量发射端包括顺序连接的直流电源、高频逆变器、能量发射谐振线路，能量接收端包括顺序连接的能量接收谐振线路、整流滤波电路和负载。信息传输通道包括信息收发端和信息发收端，信息收发端包括顺序连接的信息解调调制电路、第一信息收发谐振线路和第二信息收发谐振线路，信息发收端包括顺序连接的信息调制解调电路、第一信息发收谐振线路和第二信息发收谐振线路。The energy transmission channel includes an energy transmitting end and an energy receiving end. The energy transmitting end includes a DC power supply, a high-frequency inverter, and an energy transmitting resonant circuit connected in sequence. The energy receiving end includes an energy receiving resonant circuit, a rectifier filter circuit, and a load connected in sequence. The information transmission channel includes an information transceiver end and an information transceiver end. The information transceiver end includes an information demodulation and modulation circuit, a first information transceiver resonant circuit, and a second information transceiver resonant circuit connected in sequence. The information transceiver end includes an information modulation and demodulation circuit, a first information transceiver resonant circuit, and a second information transceiver resonant circuit connected in sequence.
关于能量如何传输，现有技术多有公开，本实施例不再赘述。关于信息传输，本系统仅能实现半双工通信。As for how to transmit energy, the prior art has been disclosed in many aspects, and this embodiment will not repeat them in detail. As for information transmission, this system can only realize half-duplex communication.
当信息从能量接收侧向能量发射侧传输时(图3所示的情形)，信息调制解调电路对需要传输的信息进行调制，由第一信息发收谐振线路、第二信息发收谐振线路和多个第一信息中继谐振环路、第二信息中继谐振环路和第一信息收发谐振线路、第二信息收发谐振线路逐级进行无线传输，最后由信息解调调制电路进行解调。When information is transmitted from the energy receiving side to the energy transmitting side (the situation shown in Figure 3), the information modulation and demodulation circuit modulates the information to be transmitted, and the first information transmitting and receiving resonant circuit, the second information transmitting and receiving resonant circuit and multiple first information relay resonant loops, the second information relay resonant loops and the first information transmitting and receiving resonant circuit, the second information transmitting and receiving resonant circuit perform wireless transmission step by step, and finally the information demodulation modulation circuit performs demodulation.
当信息从能量发射侧向能量接收侧传输时，信息解调调制电路对需要传输的信息进行调制，由第一信息收发谐振线路、第二信息收发谐振线路多个第一信息中继谐振环路、第二信息中继谐振环路和第一信息发收谐振线路、第二信息发收谐振线路逐级进行无线传输，最后由进行信息调制解调电路进行解调。When information is transmitted from the energy transmitting side to the energy receiving side, the information demodulation and modulation circuit modulates the information to be transmitted, and the first information transceiver resonant circuit, the second information transceiver resonant circuit, multiple first information relay resonant loops, the second information relay resonant loop, the first information transceiver resonant circuit, and the second information transceiver resonant circuit perform wireless transmission step by step, and finally the information modulation and demodulation circuit performs demodulation.
以注入式五线圈无线能量信息并行传输系统为例。Udc为发射端连接到整流器的直流电压源输入，UL为负载电阻RL的输出电压。S1-S4和D1-D4构成用于电能变换的逆变器和整流器。LTi、Lji和LRi(i＝1,2，j＝1,2,3)分别构成能量发射线圈、能量接收线圈与3个中继并行传输线圈。补偿电容CPT、CDTi、CPj、CDji、CPR和CDRi(i＝1,2，j＝1,2,3)被设置在每个谐振器中，以构建独立的能量与信息谐振环路，Mx-y(x,y＝Ti,ji,Ri，i＝1,2，j＝1,2,3)被定义为线圈i和线圈j间的互感。Take the injection-type five-coil wireless energy information parallel transmission system as an example. Udc is the DC voltage source input connected to the rectifier at the transmitter end, andUL is the output voltage of the load resistorRL .S1 -S4 andD1 -D4 constitute the inverter and rectifier for power conversion.LTi ,Lji andLRi (i＝1,2，j＝1,2,3) respectively constitute the energy transmitting coil, the energy receiving coil and the three relay parallel transmission coils. Compensation capacitorsCPT ,CDTi ,CPj ,CDji ,CPR andCDRi (i＝1,2，j＝1,2,3) are set in each resonator to construct an independent energy and information resonant loop, andMxy (x,y＝Ti,ji,Ri，i＝1,2，j＝1,2,3) is defined as the mutual inductance between coil i and coil j.
注入式多中继无线能量信息并行传输系统中各级线圈拥有相同的尺寸和圈数，线圈自感、补偿电容和相邻线圈之间的互感被设定为相同的值。此外，非同轴性线圈之间的互感相对较小，在此分析中可被忽略。The coils at each level in the injection-type multi-relay wireless energy information parallel transmission system have the same size and number of turns, and the coil self-inductance, compensation capacitance and mutual inductance between adjacent coils are set to the same value. In addition, the mutual inductance between non-coaxial coils is relatively small and can be ignored in this analysis.
基于基波分析法，逆变器输出电压的相位形式可被表示为：Based on the fundamental wave analysis method, the phase form of the inverter output voltage can be expressed as:
整流器的等效输入电阻可被表示为：The equivalent input resistance of the rectifier can be expressed as:
Req＝8/π2·RL。Req =8/π2 ·RL .
能量环路中每个谐振器的阻抗ZPi(i＝T,1,2,3,R)被定义为：The impedance ZPi (i＝T,1,2,3,R) of each resonator in the energy loop is defined as:
基于基尔霍夫电压定律(KVL)，含有五个双极性线圈的多中继无线能量并行传输系统能量通道可以被表示为：Based on Kirchhoff's voltage law (KVL), the energy channel of a multi-relay wireless energy parallel transmission system containing five bipolar coils can be expressed as:
其中，是各个双极性线圈能量电流的向量表示，Mx-y(x,y＝T,1,2,3,R)是各个双极性线圈间的互感，可以由如下表达式给出：in, is the vector representation of the energy current of each bipolar coil, andMxy (x,y＝T,1,2,3,R) is the mutual inductance between each bipolar coil, which can be given by the following expression:
Mx-y＝Mx1-y1+Mx2-y2。Mxy ＝Mx1-y1 +Mx2-y2 .
由于非相邻双极性线圈间的交叉耦合，能量传输的工作频率fPO将轻微偏移所设计的谐振频率fPR，以保持系统能量恒定电压输出与输入电压电流同相。Due to the cross coupling between non-adjacent bipolar coils, the operating frequency fPO of energy transmission will slightly shift from the designed resonant frequency fPR to keep the system energy constant voltage output in phase with the input voltage and current.
信息环路中每个谐振器的阻抗ZDi(i＝T,1,2,3,R)被定义为：The impedance ZDi (i＝T,1,2,3,R) of each resonator in the information loop is defined as:
ωD表示信息传输的工作角频率。ωD represents the operating angular frequency of information transmission.
基于基尔霍夫电压定律(KVL)，含有五个双极性线圈的多中继无线能量并行传输系统信息通道可以被表示为：Based on Kirchhoff's voltage law (KVL), the information channel of the multi-relay wireless energy parallel transmission system containing five bipolar coils can be expressed as:
其中，是各个双极性线圈信息电流的向量表示，UDin被定义为信息调制电路输出电压，RDeq是信息解调电路的等效输入电阻。信息传输通道的电压增益可以被表示为：in, is the vector representation of the information current of each bipolar coil, UDin is defined as the output voltage of the information modulation circuit, and RDeq is the equivalent input resistance of the information demodulation circuit. The voltage gain of the information transmission channel can be expressed as:
综上，本发明实施例提供的一种基于双极性线圈的多中继无线能量信息并行传输系统，设计了特殊结构的双极性线圈，能量传输时，能量电流遵循从双极性线圈的端口T1注入，从端口T2流出；信息传输时，信息电流遵循同时从双极性线圈端口T1和端口T2注入，并从对应的端口T3流出。本系统将该双极性线圈应用在能量发射线圈、能量接收线圈和N个中继并行传输线圈上，从而利用双极性线圈的结构特性所带来的感应电压方向特性，设计了能量与信息的双频谐振器拓扑结构(将信息调制与解调电路注入发射与接收谐振器中)，避免了能量与信息电流谐振环路间的交叉干扰。本系统仅采用一组线圈(及相应的补偿电容)，无需设计阻波网络，整体占用空间小，结构简单，使用安全，能够在多中继线圈条件下保障能量与信息的远距离高效、高速、稳定传输。In summary, the embodiment of the present invention provides a multi-relay wireless energy information parallel transmission system based on a bipolar coil, and designs a bipolar coil of a special structure. During energy transmission, the energy current follows the injection from portT1 of the bipolar coil and flows out from portT2 ; during information transmission, the information current follows the injection from portT1 and portT2 of the bipolar coil at the same time, and flows out from the corresponding portT3 . The system applies the bipolar coil to the energy transmitting coil, the energy receiving coil and N relay parallel transmission coils, thereby utilizing the induced voltage direction characteristics brought by the structural characteristics of the bipolar coil, and designs a dual-frequency resonator topology structure of energy and information (injecting the information modulation and demodulation circuit into the transmitting and receiving resonators), avoiding cross interference between the energy and information current resonant loops. The system only uses one set of coils (and corresponding compensation capacitors), does not need to design a wave blocking network, occupies a small space as a whole, has a simple structure, is safe to use, and can ensure long-distance, efficient, high-speed, and stable transmission of energy and information under the condition of multiple relay coils.
上述实施例为本发明较佳的实施方式，但本发明的实施方式并不受上述实施例的限制，其他的任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化，均应为等效的置换方式，都包含在本发明的保护范围之内。The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.
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