Splitting Frequency Diversity in Wireless Power Transmission

Nguyen, Hoang; Agbinya, Johnson I.

doi:10.1109/tpel.2015.2424312

Cited by 46 publications

(23 citation statements)

References 28 publications

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“…All the existing WPT systems (Inductive, magnetic resonance and capacitive; far field systems not included) rely on critical coupling between coils of the transmitter and receiver for efficient delivery of power [2][3][4][5][6][7] . The resonance conditions are easily affected by the external factors [6][7][8] . It has also been well understood that the need for a critical coupling leads to peak splitting phenomena for multiple resonant devices 7 .…”

mentioning

confidence: 99%

Experimental Realization of Zenneck Type Wave-based Non-Radiative, Non-Coupled Wireless Power Transmission

Oruganti

Liu

Paul

et al. 2020

Sci Rep

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A decade ago, non-radiative wireless power transmission re-emerged as a promising alternative to deliver electrical power to devices where a physical wiring proved impracticable. However, conventional "coupling-based" approaches face performance issues when multiple devices are involved, as they are restricted by factors like coupling and external environments. Zenneck waves are excited at interfaces, like surface plasmons and have the potential to deliver electrical power to devices placed on a conducting surface. Here, we demonstrate, efficient and long range delivery of electrical power by exciting non-radiative waves over metal surfaces to multiple loads. our modeling and simulation using Maxwell's equation with proper boundary conditions shows Zenneck type behavior for the excited waves and are in excellent agreement with experimental results. in conclusion, we physically realize a radically different class of power transfer system, based on a wave, whose existence has been fiercely debated for over a century.

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mentioning

confidence: 99%

Experimental Realization of Zenneck Type Wave-based Non-Radiative, Non-Coupled Wireless Power Transmission

Oruganti

Liu

Paul

et al. 2020

Sci Rep

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show abstract

“…This circumstance makes the power transmission scheme unstable and it becomes difficult to determine the ideal frequency controlling points. This phenomenon is known as "frequency splitting" and there has been a strong focus on its research [48][49][50][51][52]. When the magnetically coupled coils are placed so close to each other, the resonant peak at the load splits into double peaks and the conditions for maximum power transfer do not meet at the system's operating frequency.…”

Section: Frequency Splittingmentioning

confidence: 99%

“…To validate the feasibility of the existence of split resonant frequencies, a performance analysis of the 2-coil resonant coupled system was investigated in [52]. Fig.…”

Section: Frequency Splittingmentioning

confidence: 99%

“…Therefore, a proper adjustment of k ST and k RD can allow a low k TR to be selected. For example, if the distance between transmit and receive coils is set such that k TR ¼ 0:01, then by Table 4 List and value of parameters for a 2-coil WPT system [52]. selecting k ST ¼ 0:1 and k RD ¼ 0:1, the matching condition can be satisfied.…”

Section: Frequency Splittingmentioning

confidence: 99%

“…Therefore, the phenomenon of frequency splitting has been also observed in the 4-coil system [51][52][53]. In [53], the splitting of resonant frequency of 4-coil WPT is explained by two frequency modes based on the dynamics of resonant coupled coils.…”

Section: Frequency Splittingmentioning

confidence: 99%

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