Sweeping Effect on Witricity

Review Of Literature

Karalis et al. (2007) published the new technology called Witricity which is based on Coupled Mode Theory. This theory briefly explains that two resonant objects tend to exchange energy due to strong coupling. Both transmitter and receiver resonators should be inductively coupled so that the energy exchange becomes real. Zhang et al. (2009) and Liu et al. (2009) reported that using different kinds of resonators in the system makes energy exchange possible and pretty effective. Zhang et al. (2010) and Gundogdu et al. (2012) found out that placing a relay resonator between transmitter and receiver increases the range of the system and efficiency when it is compared to the transmission distance without a relay resonator. Gundogdu et al. (2011) explored that low load resistor values provide higher efficiency in the system. Square and triangle waveforms could be used besides sine wave; however sine wave is more efficient in the transfer system. Gundogdu et al. (2012) also reported that relay resonator could be implemented just placing an inductor, besides completing an RLC circuit of the resonator increases efficiency. They found out that adding more than one transmitter or receiver increases system’s transfer efficiency. Aligning resonators on vertical axis has more efficiency than aligning on horizontal axis.