Wireless energy transfer system and method for feeding an electric load

摘要

A wireless energy transfer system and an associated method for feeding an electric load are provided. The system includes a transmitter which includes a generator adapted to generate a radiofrequency signal at a first frequency and a first resonant circuit adapted to transmit the radiofrequency signal; and a receiver adapted to receive the radiofrequency signal and comprising a second resonant circuit. The second resonant circuit is adapted to be located in the non-radiative near field generated by the first resonant circuit, and the transmitter includes frequency sweeping functionality, which imposes on the radiofrequency signal generator a cyclic excursion of the first frequency in the neighborhood of a nominal frequency of the generator so that, when the first frequency matches the resonant frequency of the second resonant circuit, a non-radiative energy transfer occurs.

主权项

1. A wireless energy transfer system comprising:
a transmitter comprising a frequency sweeper, a radiofrequency signal generator adapted to generate a radiofrequency signal, and a first resonant circuit adapted to transmit a generated radiofrequency signal; and a receiver adapted to receive the generated radiofrequency signal and comprising a second resonant circuit having a resonant frequency, wherein the second resonant circuit is adapted to be located in a non-radiative near field generated by the first resonant circuit, wherein, based on a signal outputted by the frequency sweeper, the radiofrequency signal generator—is configured to generate a plurality of cycles of radiofrequency signals, wherein each radiofrequency signal in a cycle comprises a different frequency in a range of possible signal frequencies centered on a nominal frequency, wherein each cycle comprises at least one radiofrequency signal comprising a signal frequency that matches the resonant frequency and each cycle comprises at least one radiofrequency signal comprising a signal frequency that does not match the resonant frequency, and wherein each radiofrequency signal in each cycle of radiofrequency signals is transmitted by the first resonant circuit having a first impedance.