TY - GEN
T1 - Performance optimization of the wireless power transfer system with unbalanced resonator
AU - Ni, Bailian
AU - Chung, C. Y.
AU - Chan, H. L.
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/11/5
Y1 - 2014/11/5
N2 - Conventionally, in wireless power transfer (WPT) system, all resonators are set at exactly the same resonant frequency, which is considered as the optimal operation condition to achieve resonant coupling. However, at over-coupled region, frequency split issue occurs, as a result, the frequency for the maximum power is not coincident with the frequency for the maximum efficiency. This deteriorates the performance of the system. In this paper, an unbalanced resonator is introduced to solve this problem. Unbalanced resonator is defined as a LC resonator, whose frequency is slightly away from the original resonant frequency. Detailed theoretical analysis of the unbalanced resonator has been done, and a novel circuit model is developed for electromagnetic research study, along with a simplified circuit for engineering design. Also, simulation is implemented to verify the proposed idea. By adopting the unbalanced resonator, with same efficiency, the transferring power is increased by 38%. This method is further extended to apply in the WPT system with repeaters; experiments has been done and the results strongly agree with our proposal technology.
AB - Conventionally, in wireless power transfer (WPT) system, all resonators are set at exactly the same resonant frequency, which is considered as the optimal operation condition to achieve resonant coupling. However, at over-coupled region, frequency split issue occurs, as a result, the frequency for the maximum power is not coincident with the frequency for the maximum efficiency. This deteriorates the performance of the system. In this paper, an unbalanced resonator is introduced to solve this problem. Unbalanced resonator is defined as a LC resonator, whose frequency is slightly away from the original resonant frequency. Detailed theoretical analysis of the unbalanced resonator has been done, and a novel circuit model is developed for electromagnetic research study, along with a simplified circuit for engineering design. Also, simulation is implemented to verify the proposed idea. By adopting the unbalanced resonator, with same efficiency, the transferring power is increased by 38%. This method is further extended to apply in the WPT system with repeaters; experiments has been done and the results strongly agree with our proposal technology.
KW - critical coupling
KW - frequency splitting
KW - optimal frequency
KW - resonant coupling
KW - unbalanced resonator
KW - Wireless power transfer (WPT)
UR - https://www.scopus.com/pages/publications/84913525390
U2 - 10.1109/InfoSEEE.2014.6946251
DO - 10.1109/InfoSEEE.2014.6946251
M3 - Conference article published in proceeding or book
AN - SCOPUS:84913525390
T3 - Proceedings - 2014 International Conference on Information Science, Electronics and Electrical Engineering, ISEEE 2014
SP - 1892
EP - 1896
BT - Proceedings - 2014 International Conference on Information Science, Electronics and Electrical Engineering, ISEEE 2014
A2 - Jiang, Xiaohong
A2 - Li, Shaozi
A2 - Dai, Ying
A2 - Cheng, Yun
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 International Conference on Information Science, Electronics and Electrical Engineering, ISEEE 2014
Y2 - 26 April 2014 through 28 April 2014
ER -