Low frequency wireless power transfer using modified parallel resonance matching at a complex load

• Main Authors: Artit Rittiplang, Wanchai Pijitrojana, Komson Daroj
• Format: Article
• Language: English
• Published: Khon Kaen University 2016-10-01
• Series: KKU Engineering Journal
• Subjects: Low frequency wireless power transfer; Modified parallel resonance; Impedance matching; Wireless power transfer
• Online Access: https://www.tci-thaijo.org/index.php/kkuenj/article/download/54623/56484

In the Impedance Matching (IM) condition of Wireless Power Transfer (WPT), series resonant and strong coupling structures have been widely studied which operate at an optimal parameter, a resistive load, and the high resonant frequency of greater than 1 MHz. However, i) The optimal parameter (particular value) limits the design, ii) the common loads are complex, iii) The high frequency RF sources are usually inefficient. This paper presents a modified parallel resonant structure that can operate at a low frequency of 15 kHz without an optimal parameter under the IM condition with a complex load, and the calculated efficiency is equal to 71.2 % at 5-cm transfer distance.