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.
Highlights
A Method of Estimating Mutual Inductance and LoadDongsheng Yang 1 , Sokhui Won 1,2,† , Jiangwei Tian 1, *,† , Zixin Cheng 1 and Jongho Kim 2
Researchers are interested in the Wireless Power Transfer (WPT) system currently due to the merit of being able to transfer electric energy without a transmission cable, and many research teams have been studying the WPT system
A method for simultaneously estimating the mutual inductance and the load resistance of the system without the communication function was represented in this paper, and this method can be applied to the general ferrite-free coil WPT system
Summary
Dongsheng Yang 1 , Sokhui Won 1,2,† , Jiangwei Tian 1, *,† , Zixin Cheng 1 and Jongho Kim 2.
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