Overlapping type capacitive coupler for capacitive coupling type wireless energy transmission
A wireless energy transmission, capacitive coupler technology, applied in circuit devices, electrical components, etc., can solve problems affecting system performance, coupling coefficient changes, etc.
Active Publication Date: 2021-01-12
SHANGHAI TECH UNIV
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Problems solved by technology
However, in the existing coupler structure, it is difficult for these two characteristics to maintain a large value at the same time, and its coupling coefficient is easily affected by the change of the position of the original sub-board of the coupler, which will affect the performance of the entire system.
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[0052] The traditional capacitive coupler structure scheme can be mainly divided into horizontal and vertical capacitive couplers, such as Figure 1a , Figure 1b As shown, the original plates in the two figures are Pa and Pb, and the sub-plates are Pc and Pd. However, it is difficult for these two schemes to ensure that the coupler has a large self-capacitance and mutual capacitance at the same time, and its coupling coefficient is easily affected by the relative position of the coupler's primary and secondary plates. Figure 1a , Figure 1b It is the capacitive coupler structure in the traditional scheme, which is composed of four metal plates, including Figure 1a The horizontal capacitive coupler with Figure 1b vertical capacitive coupler. Among them, Pa and Pb are the original plates, and Pc and Pd are the secondary plates. The two plates of the original plate and the auxiliary plate of the horizontal coupler are placed horizontally on both sides. This structure has a ...
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The invention relates to an overlapping type capacitive coupler for capacitive coupling type wireless energy transmission, and belongs to the technical field of wireless energy transmission. Polar plates in the capacitive coupler are arranged to be two original plates and two auxiliary plates, each original plate is arranged to be two plate faces which are parallel to each other and connected through a wire, and one plate face of the other original plate with the same size is arranged over or under the plate face of one original plate. The two panels of one original plate and the two panels ofthe other original plate are arranged to be crossed and overlapped up and down. An auxiliary plate surface is arranged right above the original plate surface in parallel. The auxiliary plate and theoriginal plate are the same in structure. The invention provides a capacitive coupler structure. A capacitive coupler can keep large self-capacitance and mutual capacitance at the same time. And the coupling coefficient of the coupler can still keep better stability under the condition that the relative positions of the original plate and the auxiliary plate are changed within a certain range.
Description
technical field [0001] The invention relates to an overlapping capacitive coupler for capacitively coupled wireless energy transmission, which belongs to the technical field of wireless energy transmission. Background technique [0002] Nowadays, the inductively coupled wireless power transfer (IPT) method has been applied to many products, but its performance is easily affected by the metal substances in the surrounding environment and there is a certain eddy current loss. At the same time, due to the existence of the magnetic core, IPT has a large volume. As one of the alternatives to IPT, capacitively coupled wireless energy transfer (CPT) can well solve these problems. In CPT, energy must pass through a capacitive coupler for wireless transmission. Similar to inductive couplers, capacitive couplers also have two concepts of self-capacitance and mutual capacitance. Large self-capacitance helps to reduce plate voltage stress and increase transmission efficiency, and lar...
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IPC IPC(8): H02J50/05H02J50/00
CPCH02J50/05H02J50/005Y02T90/14
Inventor 刘一鹏傅旻帆
Owner SHANGHAI TECH UNIV