期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 37, 期 12, 页码 15706-15716出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2022.3188288
关键词
Adaptive frequency step; front-end monitoring; mutual coupling coefficient; power factor; wireless power transfer
资金
- A*Star MTC Individual Research [M21K2c0108]
This article presents a systematic frequency-sweeping based method for fast and accurate determination of mutual coupling coefficient in a series-series wireless power transfer system. The proposed method is found to be most sensitive when the frequency is swept from the lower frequency boundary in a weakly-coupled system. Through sensitivity analysis and evaluation of adaptive frequency step functions, the method achieves high accuracy detection in minimum time.
This article presents a systematic frequency-sweeping based method for fast and accurate determination of mutual coupling coefficient in a series-series wireless power transfer system. The novel contributions involve a sensitivity analysis to evaluate the robustness of the proposed method and an evaluation of several adaptive frequency step functions to minimize detection time with an accuracy of less than 1% error. It is found that the proposed method is the most sensitive when the frequency is swept from the lower frequency boundary in a weakly-coupled system. Several adaptive frequency step functions are evaluated and compared. A power factor reference and an adaptive frequency step function are designed in a systematic way to achieve the dual purposes of minimum detection time and high accuracy. The experimental results obtained from the hardware setups show that the mutual coupling coefficients under a range of conditions can be estimated within 7 ms and with errors typically less than 1.0%.
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