Abstract
In order to realise wireless power and information transmission (WPIT), extra signal transmission coils are added in a traditional inductively coupled power transmission (ICPT) system, which results in a complicated structure and increases the volume and cost. Moreover, crosstalk existing between the power and signal channel makes it difficult to analyse and design. Therefore, WPIT technology based on the fundamental-harmonic component for a single-channel and two-coil ICPT system is proposed, in which the signal is transferred via the third harmonic component of the triangular current flowing in the transmitting coil. The working mechanism, crosstalk among circuits, parameter selection principle of signal detection channel are analysed, and the impact of load conditions on harmonic communication quality and that of signal transmission on efficiency are discussed. The experiment results show that the method can effectively simplify the structure, reduce the volume and cost, and fundamentally simplify the modelling, analysis, and design of the system, and high-quality power and information synchronous transmission can be achieved.
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