TY - GEN
T1 - A Primary-Side Monitoring Method for Coupling Coefficient and Receiver Resonant Frequency in SS-Compensated Wireless Charging Systems with Relay Coil
AU - Zeng, Junming
AU - Chen, Shuxin
AU - Li, Kerui
AU - Hui, Shu Yuen Ron
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023/8
Y1 - 2023/8
N2 - A primary-side monitoring approach is proposed to estimate the coupling coefficient and receiver resonant frequency in a series-series compensated wireless power transfer (WPT) system in which the coupling coefficient and receiver's resonator parameters can be unknown. A relay coil, coupled with the receiver coil but decoupled from the transmitter coil, is designed to obtain the phase information of the receiver current. Two frequency sweeping processes are included to find the frequency points where the output voltage is in phase or out of phase with the input voltage. Only one zero-crossing detector is required in the process. A detailed analysis of the proposed approach is conducted. In the experiment, the estimation errors are less than 6% for the coupling coefficient and 1% for the receiver resonant frequency. Real-time implementation of the proposed method confirms that the estimation process is extremely fast. The whole estimation process only takes around ten milliseconds.
AB - A primary-side monitoring approach is proposed to estimate the coupling coefficient and receiver resonant frequency in a series-series compensated wireless power transfer (WPT) system in which the coupling coefficient and receiver's resonator parameters can be unknown. A relay coil, coupled with the receiver coil but decoupled from the transmitter coil, is designed to obtain the phase information of the receiver current. Two frequency sweeping processes are included to find the frequency points where the output voltage is in phase or out of phase with the input voltage. Only one zero-crossing detector is required in the process. A detailed analysis of the proposed approach is conducted. In the experiment, the estimation errors are less than 6% for the coupling coefficient and 1% for the receiver resonant frequency. Real-time implementation of the proposed method confirms that the estimation process is extremely fast. The whole estimation process only takes around ten milliseconds.
KW - coupling coefficient
KW - Primary side monitoring
KW - receiver resonant frequency
KW - wireless power transfer
UR - http://www.scopus.com/inward/record.url?scp=85170645809&partnerID=8YFLogxK
U2 - 10.1109/WPTCE56855.2023.10216173
DO - 10.1109/WPTCE56855.2023.10216173
M3 - Conference article published in proceeding or book
AN - SCOPUS:85170645809
T3 - 2023 IEEE Wireless Power Technology Conference and Expo, WPTCE 2023 - Proceedings
BT - 2023 IEEE Wireless Power Technology Conference and Expo, WPTCE 2023 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 IEEE Wireless Power Technology Conference and Expo, WPTCE 2023
Y2 - 4 June 2023 through 8 June 2023
ER -