Multi-terminal recombination coil structure based on wireless power transfer
A technology of wireless power transmission and coils, which is applied to circuits, inductors, electrical components, etc., can solve problems such as limiting the application range of resonant magnetic coupling wireless power transmission technology, and achieve the effect of being widely used
Inactive Publication Date: 2019-12-24
WUHAN UNIV
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Problems solved by technology
This coil structure severely limits the application range of resonant magnetic coupling wireless power transfer technology, especially in places where distance factors are susceptible, such as electric vehicle charging, robot charging, medical implant charging, etc.
Method used
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[0019] The present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.
[0020] The multi-terminal recombined coil structure of the present invention includes a transmitting end, a plurality of relay coils and a receiving end. The transmitting end includes two or more independent transmitting coil units. The two ends of the independent coil are respectively marked as the CoilA end and the CoilB end, the two ends of the capacitor are respectively marked as the CA end and the CB end, and the two ends of the switching switch are respectively marked as the SA end and the SB end; in each transmitting independent coil unit, The CoilB terminal is connected to the CA terminal, and the CB terminal is connected to the SA terminal; in each of the two adjacent transmitting independent coil units, the CA terminal of the capacitor in one transmitting independent coil unit is connected to the CoilA terminal of the i...
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The present invention discloses a multi-terminal recombination coil structure based on wireless electric energy transmission. The structure comprises an emission terminal, a plurality of relay coils and a receiving terminal. The emission terminal comprises two or more than two emission independent coil units, and each emission independent coil unit is formed by an independent coil, a capacitor and a switching switch which are connected in series in order. Each relay coil is formed by connecting in series or in parallel of one independent coil and one capacitor; the receiving terminal comprises two or more than two receiving independent coil units, and each receiving independent coil unit is formed by an independent coil, a capacitor and a switching switch which are connected in series in order; and the inductances of the independent coils and the capacitance of the capacitor in the emission terminal, the relay coils and the receiving terminal can satisfy the resonance requirement under a preset resonance frequency. The multi-terminal recombination coil structure based on the wireless electric energy transmission can ensure the stability of the power, the voltage and the current received by the receiving terminal and facilitate the wide application of the wireless electric energy transmission technology when the distances between coils are changed.
Description
technical field [0001] The invention belongs to the technical field of wireless power transmission, and in particular relates to a multi-terminal recombination coil structure based on wireless power transmission. Background technique [0002] At present, the coils commonly used in wireless power transmission technology have a fixed structure during the normal operation of the system. As the distance between the coils changes, the mutual inductance and coupling coefficient between the coils change. This kind of coil structure design can achieve high transmission efficiency within a certain distance and a certain frequency range. When the distance between the two coils changes, the transmission efficiency will drop rapidly. This coil structure severely limits the application range of resonant magnetic coupling wireless power transfer technology, especially in some places where distance factors are susceptible, such as electric vehicle charging, robot charging, medical implante...
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IPC IPC(8): H02J50/12H01F38/14
CPCH01F38/14H01F2038/146
Inventor 代中余王军华方支剑
Owner WUHAN UNIV