技术领域technical field
本发明涉及无线电能传输装置，尤其涉及一种磁耦合谐振式无线电能传输装置。The present invention relates to a wireless power transmission device, in particular to a magnetic coupling resonance type wireless power transmission device.
背景技术Background technique
自从人类社会进入了电气化时代以来，电能的传输主要通过金属导线的点对点直接接触传输。但由于导线存在摩擦、老化等问题，电能传输过程中很容易产生火花，进而影响到用电设备的寿命和用电安全。同时，在一些特殊应用场合，如矿井和水中等，导线直接接触传输容易发生危险。此外，植入体内的医疗设备的长期供电也存在不便。无线电能传输(wireless power transfer，WPT)能够解决以上问题。Since human society entered the era of electrification, the transmission of electric energy is mainly through point-to-point direct contact transmission of metal wires. However, due to problems such as friction and aging of the wires, sparks are easily generated during power transmission, which in turn affects the life of electrical equipment and the safety of electricity usage. At the same time, in some special applications, such as mines and water, direct contact transmission of wires is prone to danger. In addition, the long-term power supply of medical equipment implanted in the body is also inconvenient. Wireless power transfer (WPT) can solve the above problems.
采用电磁场作为传输媒介可以实现无线电能传输。根据原理的不同，无线电能传输大致可以分为三类：第一种是感应式，这种方式传输功率大，但传输的距离较近；第二种是辐射式，这种方式定向性好，传输距离远，但是对周围电磁环境影响大；第三种是谐振式，这是一种新兴的无线电能传输方式，又称磁耦合谐振式无线电能传输技术。该方式能够以较大的功率，在较高的效率下传输较远的距离。相比于感应式，其传输距离较远，且对于方向指向性较不敏感；相比于辐射式，其对周围电磁环境的影响较小。Wireless power transmission can be achieved by using electromagnetic fields as the transmission medium. According to the different principles, wireless power transmission can be roughly divided into three categories: the first is inductive, which transmits large power, but the transmission distance is relatively short; the second is radial, which has good orientation. The transmission distance is long, but it has a great impact on the surrounding electromagnetic environment; the third type is resonance, which is an emerging wireless power transmission method, also known as magnetic coupling resonance wireless power transmission technology. This method can transmit longer distances with higher power and higher efficiency. Compared with the inductive type, its transmission distance is longer, and it is less sensitive to directionality; compared with the radiation type, it has less impact on the surrounding electromagnetic environment.
磁耦合谐振式无线电能传输技术在近年来发展迅速。实际应用中一套发射装置通常需要给多个负载供电。现有的磁耦合谐振式无线电能传输装置通常采用多个接收线圈来实现对多个负载供电，造成结构复杂，体积笨重。Magnetically coupled resonant wireless power transfer technology has developed rapidly in recent years. In practical applications, a set of transmitting devices usually needs to supply power to multiple loads. Existing magnetically coupled resonant wireless power transmission devices usually use multiple receiving coils to supply power to multiple loads, resulting in complex structures and bulky volumes.
发明内容Contents of the invention
因此，确有必要提供一种既结构简单又可以同时对多个负载进行供电的磁耦合谐振式无线电能传输装置。Therefore, it is indeed necessary to provide a magnetically coupled resonant wireless power transmission device that has a simple structure and can simultaneously supply power to multiple loads.
一种磁耦合谐振式无线电能传输装置，其包括：一发射线圈，所述发射线圈两端分别连接一第一电容构成闭合回路，并通过该第一电容谐振，所述发射线圈用于发射电能；一与所述发射线圈间隔设置的接收线圈，所述接收线圈两端分别连接一第二电容构成闭合回路，并通过该第二电容谐振，所述接收线圈用于接收电能；以及多个负载线圈，其特征在于，该多个负载线圈对应同一个接收线圈设置，且该接收线圈通过电磁感应将接收的电能同时传递给该多个负载线圈。A magnetic coupling resonant wireless power transmission device, which includes: a transmitting coil, the two ends of the transmitting coil are respectively connected to a first capacitor to form a closed loop, and resonate through the first capacitor, the transmitting coil is used to transmit electric energy ; a receiving coil spaced apart from the transmitting coil, two ends of the receiving coil are respectively connected to a second capacitor to form a closed loop, and resonate through the second capacitor, and the receiving coil is used to receive electric energy; and a plurality of loads The coil is characterized in that the multiple load coils are set corresponding to the same receiving coil, and the receiving coil transmits the received electric energy to the multiple load coils simultaneously through electromagnetic induction.
一种磁耦合谐振式无线电能传输装置，其包括：一发射线圈；一接收线圈；以及多个负载线圈，其特征在于，该多个负载线圈对应同一个接收线圈设置，且该接收线圈通过电磁感应将电能同时传递给该多个负载线圈。A magnetic coupling resonant wireless power transmission device, which includes: a transmitting coil; a receiving coil; Magnetic induction transfers electrical energy to the plurality of load coils simultaneously.
与现有技术相比较，本发明提供的磁耦合谐振式无线电能传输装置通过单个接收线圈同时给多个负载线圈输电，结构简单。Compared with the prior art, the magnetic coupling resonant wireless power transmission device provided by the present invention simultaneously transmits power to multiple load coils through a single receiving coil, and has a simple structure.
附图说明Description of drawings
图1为本发明第一实施提供的磁耦合谐振式无线电能传输装置的结构示意图。FIG. 1 is a schematic structural diagram of a magnetic coupling resonant wireless power transmission device provided by a first embodiment of the present invention.
图2为本发明第二实施提供的磁耦合谐振式无线电能传输装置的结构示意图。Fig. 2 is a schematic structural diagram of a magnetic coupling resonant wireless power transmission device provided by a second embodiment of the present invention.
图3为本发明第三实施提供的磁耦合谐振式无线电能传输装置的结构示意图。Fig. 3 is a schematic structural diagram of a magnetic coupling resonant wireless power transmission device provided by a third embodiment of the present invention.
图4为本发明第四实施提供的磁耦合谐振式无线电能传输装置的结构示意图。FIG. 4 is a schematic structural diagram of a magnetic coupling resonant wireless power transmission device provided in a fourth embodiment of the present invention.
图5为本发明第五实施提供的磁耦合谐振式无线电能传输装置的结构示意图。Fig. 5 is a schematic structural diagram of a magnetic coupling resonant wireless power transmission device provided by a fifth embodiment of the present invention.
主要元件符号说明Explanation of main component symbols
如下具体实施例将结合上述附图进一步说明本发明。The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.
具体实施方式Detailed ways
以下将结合附图详细说明本发明实施例提供的磁耦合谐振式无线电能传输装置。The magnetic coupling resonant wireless power transmission device provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
请参阅图1，本发明第一实施例提供一种磁耦合谐振式无线电能传输装置10。所述磁耦合谐振式无线电能传输装置10包括一发射线圈120、一接收线圈130以及多个负载线圈140。Please refer to FIG. 1 , the first embodiment of the present invention provides a magnetic coupling resonant wireless power transmission device 10 . The magnetically coupled resonant wireless power transmission device 10 includes a transmitting coil 120 , a receiving coil 130 and a plurality of load coils 140 .
所述发射线圈120与所述接收线圈130间隔设置。所述发射线圈120与所述接收线圈130一起用于磁耦合谐振式无线电能传输。所述发射线圈120用于发射电能，所述接收线圈130用于接收电能并通过电磁感应将电能传递给负载线圈140。而且，一个接收线圈130可以同时使该多个负载线圈140因电磁感应而带电。所述发射线圈120与所述接收线圈130的大小可以相同，也可以不同。优选地，所述发射线圈120与所述接收线圈130的大小相同。所述发射线圈120与所述接收线圈130的线圈缠绕方式不限，可以为单层或多层缠绕。所述发射线圈120与所述接收线圈130的线圈匝数不限，可以根据需要选择。优选地，所述发射线圈120与所述接收线圈130的线圈匝数大于10匝。所述发射线圈120两端分别接上第一电容122构成闭合回路，并通过该第一电容122谐振。所述接收线圈130两端分别接上第二电容132构成闭合回路，并通过该第二电容132谐振。所述第一电容122和所述第二电容132可以为杂散电容或集中电容。所述第一电容122与所述发射线圈120的谐振频率与所述第二电容132与所述接收线圈130的谐振频率相同。所述发射线圈120与所述接收线圈130内部为中空结构，这有利于降低磁耦合谐振式无线电能传输装置10在周围介质中产生的介电损耗，提高系统的传输效率。The transmitting coil 120 is spaced apart from the receiving coil 130 . The transmitting coil 120 and the receiving coil 130 are used for magnetically coupled resonant wireless power transmission. The transmitting coil 120 is used to transmit electric energy, and the receiving coil 130 is used to receive electric energy and transfer the electric energy to the load coil 140 through electromagnetic induction. Furthermore, one receiving coil 130 can simultaneously electrify the plurality of load coils 140 by electromagnetic induction. The size of the transmitting coil 120 and the receiving coil 130 may be the same or different. Preferably, the size of the transmitting coil 120 is the same as that of the receiving coil 130 . The coil winding methods of the transmitting coil 120 and the receiving coil 130 are not limited, and may be single-layer or multi-layer winding. The number of turns of the transmitting coil 120 and the receiving coil 130 is not limited and can be selected according to needs. Preferably, the coil turns of the transmitting coil 120 and the receiving coil 130 are greater than 10 turns. Both ends of the transmitting coil 120 are respectively connected to a first capacitor 122 to form a closed loop, and resonate through the first capacitor 122 . Both ends of the receiving coil 130 are respectively connected to a second capacitor 132 to form a closed loop, and resonate through the second capacitor 132 . The first capacitor 122 and the second capacitor 132 may be stray capacitors or concentrated capacitors. The resonant frequency of the first capacitor 122 and the transmitting coil 120 is the same as the resonant frequency of the second capacitor 132 and the receiving coil 130 . The transmitting coil 120 and the receiving coil 130 have a hollow structure inside, which is beneficial to reduce the dielectric loss generated by the magnetic coupling resonant wireless power transmission device 10 in the surrounding medium, and improve the transmission efficiency of the system.
所述多个负载线圈140对应同一个接收线圈130设置。所述负载线圈140的直径小于所述接收线圈130的直径。所述负载线圈140的线圈匝数较少，通常为1到3匝。所述负载线圈140不产生谐振。所述多个负载线圈140靠近所述接收线圈130设置，所述负载线圈140与所述接收线圈130之间的距离远小于所述接收线圈130 与所述发射线圈120 之间的距离。所述负载线圈140可以平行于所述接收线圈130设置，也可以与所述接收线圈130之间成一夹角设置。当所述负载线圈140与所述接收线圈130之间成一夹角设置，优选地，该夹角大于等于0度且小于等于60度。所述夹角指所述接收线圈130与所述负载线圈140横截面或中心轴之间的夹角。所述负载线圈140可以平行于所述接收线圈130设置指所述接收线圈130与所述负载线圈140的横截面或中心轴平行。当所述多个负载线圈140均为单匝时，所述多个负载线圈140可以共面设置。所述接收线圈130与所述负载线圈140之间的耦合系数可以通过调节所述接收线圈130与所述负载线圈140之间的距离、偏移或通过调节所述接收线圈130与所述负载线圈140的不同形状来实现。从而可以调节该磁耦合谐振式无线电能传输装置10的传输效率和输出功率。The multiple load coils 140 are set corresponding to the same receiving coil 130 . The diameter of the loading coil 140 is smaller than that of the receiving coil 130 . The number of turns of the load coil 140 is relatively small, usually 1 to 3 turns. The load coil 140 does not resonate. The plurality of load coils 140 are disposed close to the receiving coil 130, and the distance between the load coil 140 and the receiving coil 130 is much smaller than the distance between the receiving coil 130 and the transmitting coil 120. The load coil 140 may be arranged parallel to the receiving coil 130 , or may be arranged at an included angle with the receiving coil 130 . When the loading coil 140 and the receiving coil 130 are arranged at an included angle, preferably, the included angle is greater than or equal to 0 degrees and less than or equal to 60 degrees. The included angle refers to the included angle between the receiving coil 130 and the cross section or central axis of the loading coil 140 . The loading coil 140 may be arranged parallel to the receiving coil 130 , which means that the receiving coil 130 is parallel to the cross section or central axis of the loading coil 140 . When the plurality of load coils 140 are all single-turn, the plurality of load coils 140 may be coplanarly arranged. The coupling coefficient between the receiving coil 130 and the loading coil 140 can be adjusted by adjusting the distance between the receiving coil 130 and the loading coil 140, offset or by adjusting the receiving coil 130 and the loading coil 140 different shapes to achieve. Therefore, the transmission efficiency and output power of the magnetically coupled resonant wireless power transmission device 10 can be adjusted.
本实施例中，所述发射线圈120与所述接收线圈130均为采用包有绝缘层的铜导线的密绕型中空螺线管线圈，且所述发射线圈120与所述接收线圈130均为20匝。所述负载线圈140也为包有绝缘层的铜导线线圈。所述负载线圈140数量为三，其中两个负载线圈140为两匝，另外一个负载线圈140为单匝。所述三个负载线圈140平行于所述接收线圈130设置。In this embodiment, both the transmitting coil 120 and the receiving coil 130 are densely wound hollow solenoid coils using copper wires covered with an insulating layer, and the transmitting coil 120 and the receiving coil 130 are both 20 turns. The load coil 140 is also a copper wire coil covered with an insulating layer. The number of the load coils 140 is three, wherein two load coils 140 have two turns, and the other load coil 140 has a single turn. The three loading coils 140 are arranged parallel to the receiving coil 130 .
所述磁耦合谐振式无线电能传输装置10工作时，将所述发射线圈120两端分别接上电源100，且使得发射线圈120与所述第一电容122并联或串联。每个负载线圈140的导线两端连接至少一负载142。所述发射线圈120发射电能，所述接收线圈130接收电能并通过电磁感应将电能同时传递给多个负载线圈140。所述负载线圈140带动所述负载142工作，从而实现同时向多个负载142进行无线电能传输。When the magnetically coupled resonant wireless power transmission device 10 is working, both ends of the transmitting coil 120 are respectively connected to the power source 100 , and the transmitting coil 120 is connected in parallel or in series with the first capacitor 122 . Two ends of the wires of each load coil 140 are connected to at least one load 142 . The transmitting coil 120 transmits electric energy, and the receiving coil 130 receives electric energy and transmits electric energy to multiple load coils 140 simultaneously through electromagnetic induction. The load coil 140 drives the load 142 to work, so as to implement wireless power transmission to multiple loads 142 at the same time.
请参阅图2，本发明第二实施例提供一种磁耦合谐振式无线电能传输装置20。所述磁耦合谐振式无线电能传输装置20包括一电源线圈110、一发射线圈120、一接收线圈130以及多个负载线圈140。Please refer to FIG. 2 , the second embodiment of the present invention provides a magnetic coupling resonant wireless power transmission device 20 . The magnetically coupled resonant wireless power transmission device 20 includes a power coil 110 , a transmitter coil 120 , a receiver coil 130 and a plurality of load coils 140 .
本发明第二实施例的磁耦合谐振式无线电能传输装置20与第一实施例的磁耦合谐振式无线电能传输装置10结构基本相同，其区别为：该无线电能传输装置20进一步包括一电源线圈110。The structure of the magnetic coupling resonance wireless power transmission device 20 of the second embodiment of the present invention is basically the same as that of the magnetic coupling resonance wireless power transmission device 10 of the first embodiment, the difference being that the wireless power transmission device 20 further includes a power coil 110.
所述电源线圈110靠近该发射线圈120设置，且设置于该发射线圈120远离接收线圈130的一侧。所述电源线圈110与所述发射线圈120间隔设置，且所述电源线圈110与所述发射线圈120之间的距离远小于所述发射线圈120 与所述接收线圈130 之间的距离。所述电源线圈110的线圈匝数较少，通常为1到3匝。本实施例中，所述电源线圈110为两匝。The power supply coil 110 is disposed close to the transmitting coil 120 and is disposed on a side of the transmitting coil 120 away from the receiving coil 130 . The power supply coil 110 is spaced apart from the transmitting coil 120, and the distance between the power supply coil 110 and the transmitting coil 120 is much smaller than the distance between the transmitting coil 120 and the receiving coil 130. The number of turns of the power coil 110 is relatively small, usually 1 to 3 turns. In this embodiment, the power coil 110 has two turns.
所述磁耦合谐振式无线电能传输装置20工作时，将所述电源线圈110两端分别接上电源100。每个负载线圈140的导线两端连接至少一负载142。所述电源线圈110与所述发射线圈120通过电磁感应将电能传输至发射线圈120。所述发射线圈120发射电能，所述接收线圈130接收电能并通过电磁感应将电能同时传递给多个负载线圈140。所述负载线圈140带动所述负载142工作，从而实现同时向多个负载142进行无线电能传输。可以理解，进一步还可以通过调整电源线圈110和发射线圈120之间的互感以调节输出功率和效率。When the magnetic coupling resonant wireless power transmission device 20 is working, both ends of the power supply coil 110 are respectively connected to the power supply 100 . Two ends of the wires of each load coil 140 are connected to at least one load 142 . The power coil 110 and the transmitting coil 120 transmit electric energy to the transmitting coil 120 through electromagnetic induction. The transmitting coil 120 transmits electric energy, and the receiving coil 130 receives electric energy and transmits electric energy to multiple load coils 140 simultaneously through electromagnetic induction. The load coil 140 drives the load 142 to work, so as to implement wireless power transmission to multiple loads 142 at the same time. It can be understood that the output power and efficiency can further be adjusted by adjusting the mutual inductance between the power supply coil 110 and the transmitting coil 120 .
请参阅图3，本发明第三实施例提供一种磁耦合谐振式无线电能传输装置30。所述磁耦合谐振式无线电能传输装置30包括一发射线圈120、一接收线圈130以及多个负载线圈140。Referring to FIG. 3 , the third embodiment of the present invention provides a magnetically coupled resonant wireless power transmission device 30 . The magnetically coupled resonant wireless power transmission device 30 includes a transmitting coil 120 , a receiving coil 130 and a plurality of load coils 140 .
本发明第三实施例的磁耦合谐振式无线电能传输装置30与第一实施例的磁耦合谐振式无线电能传输装置10结构基本相同，其区别为：该多个负载线圈140设置于所述接收线圈130内部，且所述负载线圈140的两端延伸至所述接收线圈130外部，以便连接负载142。The structure of the magnetic coupling resonant wireless power transmission device 30 of the third embodiment of the present invention is basically the same as that of the magnetic coupling resonant wireless power transmission device 10 of the first embodiment. The inside of the coil 130 , and the two ends of the load coil 140 extend to the outside of the receiver coil 130 for connecting the load 142 .
本实施例中，所述接收线圈130采用包有绝缘层的导线制备，或所述负载线圈140采用包有绝缘层的导线制备。优选地，所述接收线圈130和所述负载线圈140均采用包有绝缘层的导线制备。所述接收线圈130的线圈距离大于所述负载线圈140的导线的直径。可以理解，由于负载线圈140设置于所述接收线圈130内部，因此该接收线圈130与负载线圈140之间的电磁感应更强，减小了电能损耗，提高了传输功率。In this embodiment, the receiving coil 130 is made of a wire covered with an insulating layer, or the load coil 140 is made of a wire covered with an insulating layer. Preferably, both the receiving coil 130 and the loading coil 140 are made of wires covered with an insulating layer. The coil distance of the receiving coil 130 is greater than the diameter of the wire of the loading coil 140 . It can be understood that since the load coil 140 is disposed inside the receiving coil 130 , the electromagnetic induction between the receiving coil 130 and the load coil 140 is stronger, which reduces power loss and improves transmission power.
请参阅图4，本发明第四实施例提供一种磁耦合谐振式无线电能传输装置40。所述磁耦合谐振式无线电能传输装置40包括一发射线圈120、一接收线圈130以及多个负载线圈140。Please refer to FIG. 4 , a fourth embodiment of the present invention provides a magnetic coupling resonant wireless power transmission device 40 . The magnetically coupled resonant wireless power transmission device 40 includes a transmitting coil 120 , a receiving coil 130 and a plurality of load coils 140 .
本发明第四实施例的磁耦合谐振式无线电能传输装置40与第一实施例的磁耦合谐振式无线电能传输装置10结构基本相同，其区别为：该发射线圈120和接收线圈130的线圈均同心盘绕在同一平面内。可以理解，由于该发射线圈120、接收线圈130以及负载线圈140的线圈均同心盘绕，每个线圈的厚度很小，相当于线圈导线的直径。因此，该无线电能传输装置40试用于厚度较小的电子设备。The structure of the magnetic coupling resonant wireless power transmission device 40 of the fourth embodiment of the present invention is basically the same as that of the magnetic coupling resonant wireless power transmission device 10 of the first embodiment, the difference being that the coils of the transmitting coil 120 and the receiving coil 130 are both Coiled concentrically in the same plane. It can be understood that since the coils of the transmitting coil 120 , the receiving coil 130 and the loading coil 140 are concentrically wound, the thickness of each coil is very small, which is equivalent to the diameter of the coil wire. Therefore, the wireless power transmission device 40 is tried to be used in electronic equipment with a small thickness.
请参阅图5，本发明第五实施例提供一种磁耦合谐振式无线电能传输装置50。所述磁耦合谐振式无线电能传输装置50包括一发射线圈120、一接收线圈130以及多个负载线圈140。Please refer to FIG. 5 , a fifth embodiment of the present invention provides a magnetic coupling resonant wireless power transmission device 50 . The magnetically coupled resonant wireless power transmission device 50 includes a transmitting coil 120 , a receiving coil 130 and a plurality of load coils 140 .
本发明第五实施例的磁耦合谐振式无线电能传输装置50与第一实施例的磁耦合谐振式无线电能传输装置10结构基本相同，其区别为：该接收线圈130的每匝线圈均包括一母线圈134以及多个子线圈136。The structure of the magnetic coupling resonant wireless power transmission device 50 of the fifth embodiment of the present invention is basically the same as that of the magnetic coupling resonant wireless power transmission device 10 of the first embodiment, and the difference is that each turn of the receiving coil 130 includes a The main coil 134 and a plurality of sub-coils 136 .
所述每匝线圈的母线圈134和多个子线圈136共面设置。所述每匝线圈的子线圈136的个数不限，可以根据需要选择。优选地，所述多个子线圈136等间隔设置。本实施例中，每匝线圈均包括一个母线圈134以及三个子线圈136。所述母线圈134和多个子线圈136的缠绕方向相同，从而使得所述母线圈134和多个子线圈136中的电流方向相同，同为顺时针或逆时针。所述多个负载线圈140可以与子线圈136一一对应设置。或者仅仅将边缘的负载线圈140与子线圈136对应设置，而中间的负载线圈140与母线圈134对应设置。可以理解，位于边缘的负载线圈140与母线圈134的耦合程度较低，该无线电能传输装置50工作时，由于边缘的负载线圈140分别与一子线圈136对应设置，通过与该对应的子线圈136电磁感应，挺高了边缘的负载线圈140的耦合程度。The main coil 134 and the multiple sub-coils 136 of each turn of the coil are coplanarly arranged. The number of sub-coils 136 per turn of the coil is not limited and can be selected according to needs. Preferably, the plurality of sub-coils 136 are arranged at equal intervals. In this embodiment, each turn of the coil includes a main coil 134 and three sub-coils 136 . The winding directions of the main coil 134 and the sub-coils 136 are the same, so that the current directions in the main coil 134 and the sub-coils 136 are the same, clockwise or counterclockwise. The plurality of load coils 140 may be arranged in one-to-one correspondence with the sub-coils 136 . Alternatively, only the load coil 140 at the edge is set correspondingly to the sub-coil 136 , and the load coil 140 in the middle is set correspondingly to the main coil 134 . It can be understood that the coupling degree between the load coil 140 at the edge and the main coil 134 is relatively low. When the wireless power transmission device 50 is working, since the load coil 140 at the edge is respectively set corresponding to a sub-coil 136, the corresponding sub-coil 136 electromagnetic induction, which increases the coupling degree of the load coil 140 at the edge.
本发明实施例提供的磁耦合谐振式无线电能传输装置具有以下优点：通过单个接收线圈130同时给多个负载线圈140输电，结构简单，且提高了传输效率。The magnetic coupling resonant wireless power transmission device provided by the embodiment of the present invention has the following advantages: a single receiving coil 130 transmits power to a plurality of load coils 140 at the same time, the structure is simple, and the transmission efficiency is improved.
另外，本领域技术人员还可在本发明精神内做其他变化，当然，这些依据本发明精神所做的变化，都应包含在本发明所要求保护的范围之内。In addition, those skilled in the art can also make other changes within the spirit of the present invention. Of course, these changes made according to the spirit of the present invention should be included within the scope of protection claimed by the present invention.
| Application Number | Priority Date | Filing Date | Title |
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| CN201410026742.1ACN103746466B (en) | 2014-01-21 | 2014-01-21 | A kind of magnet coupled resonant type wireless power transfer being applicable to multi-load transmission |
| Application Number | Priority Date | Filing Date | Title |
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| CN201410026742.1ACN103746466B (en) | 2014-01-21 | 2014-01-21 | A kind of magnet coupled resonant type wireless power transfer being applicable to multi-load transmission |
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| CN201410026742.1AExpired - Fee RelatedCN103746466B (en) | 2014-01-21 | 2014-01-21 | A kind of magnet coupled resonant type wireless power transfer being applicable to multi-load transmission |
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