A Maximum Power Transfer Tracking Method for WPT Systems with Coupling Coefficient Identification Considering Two-Value Problem

Xin Dai, Xiaofei Li, Yanling Li, Pengqi Deng and Chunsen Tang
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Xin Dai: College of Automation, Chongqing University, Chongqing 400044, China
Xiaofei Li: College of Automation, Chongqing University, Chongqing 400044, China
Yanling Li: College of Automation, Chongqing University, Chongqing 400044, China
Pengqi Deng: College of Automation, Chongqing University, Chongqing 400044, China
Chunsen Tang: College of Automation, Chongqing University, Chongqing 400044, China

Energies, 2017, vol. 10, issue 10, 1-13

Abstract: Maximum power transfer tracking (MPTT) is meant to track the maximum power point during the system operation of wireless power transfer (WPT) systems. Traditionally, MPTT is achieved by impedance matching at the secondary side when the load resistance is varied. However, due to a loosely coupling characteristic, the variation of coupling coefficient will certainly affect the performance of impedance matching, therefore MPTT will fail accordingly. This paper presents an identification method of coupling coefficient for MPTT in WPT systems. Especially, the two-value issue during the identification is considered. The identification approach is easy to implement because it does not require additional circuit. Furthermore, MPTT is easy to realize because only two easily measured DC parameters are needed. The detailed identification procedure corresponding to the two-value issue and the maximum power transfer tracking process are presented, and both the simulation analysis and experimental results verified the identification method and MPTT.

Keywords: maximum power transfer tracking (MPTT); wireless power transfer (WPT); coupling coefficient; identification; impedance matching (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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