Coupling Coefficient Estimation in Inductive Power Transfer Systems Through Damped Frequency

This letter proposes a novel approach for estimating coupling coefficients in inductive power transfer systems based on damped frequencies. In systems incorporating a voltage load, disturbances can lead to current/power oscillations at a damped frequency due to poorly damping characteristics. By ana...

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Bibliographic Details
Published inIEEE transactions on power electronics Vol. 39; no. 10; pp. 11991 - 11996
Main Authors Zhou, Jiayu, Wang, Xiaosheng, Jiang, C. Q., Fan, Yuanshuang, Ma, Tianlu, Xiang, Jingchun
Format Journal Article
LanguageEnglish
Published IEEE 01.10.2024
Subjects
Coupling coefficient
Couplings
damped frequency
Damping
Estimation
inductive power transfer (IPT)
Mathematical models
Resonant frequency
Voltage
Wireless communication
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Summary:This letter proposes a novel approach for estimating coupling coefficients in inductive power transfer systems based on damped frequencies. In systems incorporating a voltage load, disturbances can lead to current/power oscillations at a damped frequency due to poorly damping characteristics. By analyzing the damped frequency of the oscillating components of dc-side currents, the coupling coefficient can be accurately determined without the need for wireless communication, additional hardware, and complex calculations. Experimental results demonstrate the effectiveness of the proposed method, which can estimate coupling coefficients within 0.5 ms based on dc-side currents.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2024.3423308