TY - GEN
T1 - A Low-Power Resonance Detector for Output Power Optimization in Wireless Power Transfer Systems
AU - Yao, Dao Han
AU - Ting, Cheng Wei
AU - Yang, Fu Bin
AU - Chen, Po Hung
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024
Y1 - 2024
N2 - This paper introduces a class-D power amplifier (PA) incorporating a power-efficient resonance detection circuit designed for resonant wireless power transfer (WPT) systems. In the operation of resonant WPT systems, the process tolerance of the L-C resonant components on both sides introduce an imaginary part in the equivalent reflected impedance in the PA, resulting in a degradation of the power transferred to the secondary side. The magnitude of the imaginary part can vary depending on the measurement setup of the WPT system, including the coupling distance, misalignment of the coils, and output loading conditions. Therefore, a resonant detector is proposed to estimate the reactance on the primary side and assist in adjusting the magnitude of the compensation capacitance to ensure the resonance of the L-C tank. Additionally, this proposed detector consumes only 249uW during measurement, making it suitable to be employed in low-power applications.
AB - This paper introduces a class-D power amplifier (PA) incorporating a power-efficient resonance detection circuit designed for resonant wireless power transfer (WPT) systems. In the operation of resonant WPT systems, the process tolerance of the L-C resonant components on both sides introduce an imaginary part in the equivalent reflected impedance in the PA, resulting in a degradation of the power transferred to the secondary side. The magnitude of the imaginary part can vary depending on the measurement setup of the WPT system, including the coupling distance, misalignment of the coils, and output loading conditions. Therefore, a resonant detector is proposed to estimate the reactance on the primary side and assist in adjusting the magnitude of the compensation capacitance to ensure the resonance of the L-C tank. Additionally, this proposed detector consumes only 249uW during measurement, making it suitable to be employed in low-power applications.
KW - class-D power amplifier
KW - resonance detector
KW - resonant wireless power transfer system
UR - http://www.scopus.com/inward/record.url?scp=85197391722&partnerID=8YFLogxK
U2 - 10.1109/WPTCE59894.2024.10557436
DO - 10.1109/WPTCE59894.2024.10557436
M3 - Conference contribution
AN - SCOPUS:85197391722
T3 - Proceedings of 2024 IEEE Wireless Power Technology Conference and Expo, WPTCE 2024
SP - 678
EP - 681
BT - Proceedings of 2024 IEEE Wireless Power Technology Conference and Expo, WPTCE 2024
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2024 IEEE Wireless Power Technology Conference and Expo, WPTCE 2024
Y2 - 8 May 2024 through 11 May 2024
ER -