Abstract
Wireless power transfer is gradually becoming a new choice for power supply for electric power inspection robots with its security and stability. In practical applications, in order to achieve autonomous charging of the robots, stable information interaction between the transmitting and receiving sides is required, among which magnetic near-field wireless information transfer technology can be an effective method for information interaction. However, cross-coupling between the power and information channels affects transmission efficiency. In this paper, we propose an integrated structure for simultaneous wireless information and power transfer based on magnetic near-field coupling. The circular coil is used for energy transmission. Two pairs of DD coils connected in series and vertically placed inside the circular coil for information transmission, which together form an integrated structure. The resulting integrated structure enables the decoupling of the power and information channels. The simulation results show that the interference between the power channel and the information channel is only 4nH, accounting for only 0.03% of the mutual inductance between the power channels. Through experiments, it is verified that the influence of the power channel and the information channel can be ignored.
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