Optimization of WPT efficiency using a conjugate load in non-impedance matched systems.
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EditorInstitute of Electrical and Electronics Engineers (IEEE)
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Maximum power transfer and maximum efficiency are two important design constraints in wireless power transfer applications. Several works have investigated the proper load and impedance match conditions to optimize either efficiency or power transfer. In this paper we show that the optimal load for maximum power transfer and maximum efficiency is the same (a conjugate matched load) when the source resistance is zero. This is important, as many WPT systems have a relatively low, unknown source impedance. Since the optimal load for both efficiency and power is the same as the source impedance approaches zero, the designer can use a bi-conjugate load for a near optimal design for both maximum power and efficiency. As the source impedance becomes significant, the bi-conjugate matched system provides higher power, but at the expense of lower efficiency. Maximum efficiency is achieved with a non-bi-conjugate load, when the source impedance is non-negligible.
CitacióChabalko, M. [et al.]. Optimization of WPT efficiency using a conjugate load in non-impedance matched systems.. A: IEEE International Symposium on Antennas and Propagation. "2014 IEEE Antennas and Propagation Society International Symposium: proceedings: July 6–11, 2014: Memphis Convention Center, Memphis, Tennessee, USA". Memphis: Institute of Electrical and Electronics Engineers (IEEE), 2014, p. 645-646.
Versió de l'editorhttp://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6904653
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