A Method of Estimating Mutual Inductance and Load Resistance Using Harmonic Components in Wireless Power Transfer System

Dongsheng Yang, Sokhui Won, Jiangwei Tian, Zixin Cheng and Jongho Kim
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Dongsheng Yang: School of Information Science and Engineering, Northeastern University, Shenyang 110819, China
Sokhui Won: School of Information Science and Engineering, Northeastern University, Shenyang 110819, China
Jiangwei Tian: School of Information Science and Engineering, Northeastern University, Shenyang 110819, China
Zixin Cheng: School of Information Science and Engineering, Northeastern University, Shenyang 110819, China
Jongho Kim: Institute of Electronic, State Academy of Sciences, Kwahak-1 Dong, Unjong District, Pyongyang 999093, Korea

Energies, 2019, vol. 12, issue 14, 1-19

Abstract: In general, for the WPT (Wireless Power Transfer) system, as the mutual inductance and load resistance are calculated according to the measured data of both the transmitter and receiver, the wireless communication modules are needed to share data. A method for estimating mutual inductance and load resistance without wireless communication is proposed, based on the fundamental and third harmonic components. The circuit is decomposed with respect to the frequencies, by which the mathematic model is established. The fundamental and harmonic components of the output voltage and current of a high-frequency inverter are found by FFT (Fast Fourier Transform). The experimental WPT system with a SiC power MOSFET is designed, and the effectiveness of the proposed method is verified by the simulation and experiment results. Additional hardware and frequency scanning operation are not needed because of the use of the harmonic components.

Keywords: wireless power transfer; harmonic frequency; fast fourier transform; mutual inductance and load resistance (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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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