Email this article 
Open Access
Subscription or Fee Access
Design and Implementation of Class EF2 Circuit Based Wireless Power Transfer
Abstract
This paper presents the design and implementation of a Class EF2 inverter and Class EF2 rectifier for two -W Wireless Power Transfer (WPT) systems, one operating at 6.78 MHz and the other at 27.12 MHz’s It will be shown that the Class EF2 circuits can be designed to have beneficial features for WPT applications such as reduced second-harmonic component and lower total harmonic distortion, higher power-output capability, reduction in magnetic core requirements and operation at higher frequencies in rectification compared to other circuit topologies. A model will first be presented to analyze the circuits and to derive values of its components to achieve optimum switching operation. Additional analysis regarding harmonic content, magnetic core requirements and open-circuit protection will also be performed. The design and implementation process of the two Class-EF2based WPT systems will be discussed and compared to an equivalent Class-E-based WPT system. Experimental results will be provided to confirm validity of the analysis. A dc–dc efficiency of 75% was achieved with Class-EF2 -based systems.
Keywords
References
M. K. Kazimierczuk, RF Power Amplifiers, 2nd ed. Chichester, UK: John Wiley & Sons Ltd, 2015.
A. Grebennikov, N. O. Sokal, and M. J. Franco, Switched mode RF and Microwave Power Amplifiers. Oxford, UK: Academic Press, 2012.
S. Aldhaher, P. C.-K. Luk, A. Bati, and J. F. Whidborne, “Wireless power transfer using Class E inverter with saturable dc-feed inductor,” IEEE Trans. Ind. Appl., vol. 50, no. 4, pp. 2710–2718, Jul. 2014.
S. Aldhaher, P. C.-K. Luk, and J. F. Whidborne, “Tuning Class E inverters applied in inductive links using saturable reactors,” IEEE Trans. Power Electron., vol. 29, no. 6, pp. 2969–2978, Jun. 2014.
M. Pinuela, D. Yates, S. Lucyszyn, and P. Mitcheson, “Maximizing dcto-load efficiency for inductive power transfer,” Power Electronics, IEEE Transactions on, vol. 28, no. 5, pp. 2437–2447, May 2013.
A. Mediano and N. Sokal, “A Class-E RF power amplifier with a flattop transistor-voltage waveform,” IEEE Trans. Power Electron., vol. 28, no. 11, pp. 5215–5221, Nov. 2013.
A. Grebennikov, “High-efficiency Class E/F lumped and transmissionline power amplifiers,” IEEE Trans. Microw. Theory Techn., vol. 59, no. 6, pp. 1579–1588, Jun. 2011.
Z. Kaczmarczyk, “High-efficiency Class E, EF2, and E/F3 inverters,” IEEE Tran Ind. Electron., vol. 53, no. 5, pp. 1584–1593, Oct. 2006.
S. D. Kee, I. Aoki, A. Hajimiri, and D. Rutledge, “The Class-E/F family of ZVS switching amplifiers,” IEEE Trans. Microw. Theory Techn., vol. 51, no. 6, pp. 1677–1690, Jun. 2003.
M. Hayati, A. Sheikhi, and A. Grebennikov, “Effect of nonlinearity of parasitic capacitance on analysis and design of Class E/F3 power amplifier,” IEEE Trans. Power Electron, Feb. 2015.
Park M, Yu In-K. A novel real-time simulation technique of photovoltaic generation systems using RTDS. IEEE Trans Energy Convers 2004; 19(1):164–9.
Wei Jiang, Yu-fei Zhou, Jun-ning Chen. Modeling and simulation of boost converter in CCM and DCM. In: IEEE conference; 2009. p. 288–91.
Mazouz N, Midoun A. Control of a DC/DC converter by fuzzy controller for a solar pumping system. Int J Electr Power Energy Syst 2011; 33(10):1623–30.
S. Bhattacharya and D. Diwan, Synchronous frame based controller implementation for a hybrid series active filter system, in Proc. IEEE Ind. Appl. Soc. Meeting 1995, pp. 2531–2540.
H. Kouara, H. Laib and A. Chaghi, A New Method to Extract Reference Currents for Shunt Active Power Filter in Three Phase Four Wire Systems, Int. Jour of Adv. Science & Technology, 2012; 46: 165-174.
J. R. Hendershot and T. J. E. Miller, Design of Brushless Permanent Magnet Motors, Oxford, U.K.: Magna Physics, 1994.
Vijayakumar, G & Karuppusamy, P 2017, Certain Investigation on Multilevel Inverters for Photovoltaic Grid Connected System, Journal of Circuits, Systems, and Computers, vol.25, no.9, pp. 1506 - 12.
Vijayakumar, G, Karthikeyan, C & Ravi, V 2016, Operation of PV System With dc–dc Boost-Fed Shunt Active Filter (SAF)to Mitigate Current Harmonics and Energy Conservation', Journal of Testing and Evaluation, vol. 44, no. 1, pp. 342 -356.
Refbacks
- There are currently no refbacks.
This work is licensed under a Creative Commons Attribution 3.0 License.