TY - JOUR
T1 - A Double-Sided LC-Compensation Circuit for Loosely Coupled Capacitive Power Transfer
AU - Lu, Fei
AU - Zhang, Hua
AU - Hofmann, Heath
AU - Mi, Chunting Chris
N1 - Funding Information:
Manuscript received November 21, 2016; revised January 17, 2017; accepted February 22, 2017. Date of publication February 24, 2017; date of current version November 2, 2017. This work was supported in part by the U.S. Department of Energy Graduate Automotive Technology Education Grant, in part by the San Diego State University, and in part by the University of Michigan-Ann Arbor. Recommended for publication by Associate Editor O. Trescases.
Publisher Copyright:
© 2017 IEEE.
PY - 2018/2
Y1 - 2018/2
N2 - This paper proposes a double-sided LC-compensation circuit for a loosely coupled, long-distance capacitive power transfer (CPT) system. A CPT system usually contains two pairs of metal plates as the capacitive coupler. An LC-compensation circuit resonates with the coupler to generate high voltages, and corresponding electric fields, to transfer power. When the compensation circuit is used on both the primary and secondary sides, it results in a double-sided LC-compensated CPT system. The working principle and frequency properties of the CPT system are analyzed. The results show a similarity with the series-series-compensated inductive power transfer system, which has both constant-voltage (CV) and constant-current (CC) working modes. LC-compensation is also compared with LCLC-compensation in terms of power, frequency properties, and output efficiency. A 150-W double-sided LC-compensated CPT prototype is designed and implemented to demonstrate a loosely coupled CPT system with 2.16% coupling coefficient. For both CC and CV working modes, the experimental results achieve dc-dc efficiencies higher than 70% across an air-gap distance of 180 mm with a switching frequency of 1.5 MHz.
AB - This paper proposes a double-sided LC-compensation circuit for a loosely coupled, long-distance capacitive power transfer (CPT) system. A CPT system usually contains two pairs of metal plates as the capacitive coupler. An LC-compensation circuit resonates with the coupler to generate high voltages, and corresponding electric fields, to transfer power. When the compensation circuit is used on both the primary and secondary sides, it results in a double-sided LC-compensated CPT system. The working principle and frequency properties of the CPT system are analyzed. The results show a similarity with the series-series-compensated inductive power transfer system, which has both constant-voltage (CV) and constant-current (CC) working modes. LC-compensation is also compared with LCLC-compensation in terms of power, frequency properties, and output efficiency. A 150-W double-sided LC-compensated CPT prototype is designed and implemented to demonstrate a loosely coupled CPT system with 2.16% coupling coefficient. For both CC and CV working modes, the experimental results achieve dc-dc efficiencies higher than 70% across an air-gap distance of 180 mm with a switching frequency of 1.5 MHz.
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U2 - 10.1109/TPEL.2017.2674688
DO - 10.1109/TPEL.2017.2674688
M3 - Article
AN - SCOPUS:85034217785
SN - 0885-8993
VL - 33
SP - 1633
EP - 1643
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 2
M1 - 7864446
ER -