TY - JOUR
T1 - Comparison of Four Resonant Topologies Based on Unified Design Procedure for Capacitive Power Transfer
AU - Imura, Takehiro
AU - Suzuki, Kenta
AU - Hata, Katsuhiro
AU - Hori, Yoiclii
N1 - Funding Information:
This paper analyzed and evaluated the transmission characteristics in the four of SS, SP, PS and PP topologies applied the compensation inductors and the optimal load conditions based on the gyrator and ideal transformer design. The voltage source is used uniformly. Under the unified design conditions, four topologies can obtain the same transmission efficiency and the CUPF characteristics of source. However, there are the differences which the output power of PS, PP topologies is about k2 times smaller than that in SS, SP topologies, and the optimal load in SS and PS topologies is about k2 times smaller than that in SP and PP topologies. Also, SS and PP topologies showed CC characteristics, and SP and PS topologies showed CV characteristics. Furthermore, in only SS and SP topologies with high power, the effectiveness of the design method and transmission characteristics evaluation is verified by the powering experiment. From the above evaluations, either SS or SP topologies which are superior in terms of the output power should be selected according to relationship between the optimal load value, CC or CV characteristics and specification of the applications when power source is voltage source. The future work is to achieve the high-efficiency and high-power transmission at the long distance in CPT in SS and SP topologies. Acknowledgment This work was partly supported by JSPS KAKENHI Grant Number 17H04915.
Publisher Copyright:
© 2021 Institute of Electrical Engineers of Japan. All rights reserved.
PY - 2021/5
Y1 - 2021/5
N2 - This study analyzes and evaluates four transmission characteristics of the capacitive power transfer (CPT) with resonance coupling. A constant voltage source is used under all conditions. The target compensation topologies for the investigation are series-series (SS), series-parallel (SP), parallel-series (PS) and parallel-parallel (PP) topologies. The analysis results under the unified conditions describe the five transmission characteristics: (a) the equivalent maximum efficiency in four topologies, (b) the squared lower output power of the coupling coefficient of PS and PP topologies compared with those of SS and SP topologies, (c) the squared lower optimal loads of the coupling coefficient of SS and PS topologies compared with those of SP and PP topologies, (d) the constant unit power factor (CUPF) characteristics from the source in four topologies, (e) the constant current (CC) characteristics in SS and PP topologies, and the constant voltage (CV) characteristics in SP and PS topologies at the load variation around the optimal load. From these evaluations, both SS and SP topologies, which are superior in terms of the output power, are recommended when using the voltage source. Finally, the powering experiment in SS and SP topologies shows the effectiveness of these evaluations.
AB - This study analyzes and evaluates four transmission characteristics of the capacitive power transfer (CPT) with resonance coupling. A constant voltage source is used under all conditions. The target compensation topologies for the investigation are series-series (SS), series-parallel (SP), parallel-series (PS) and parallel-parallel (PP) topologies. The analysis results under the unified conditions describe the five transmission characteristics: (a) the equivalent maximum efficiency in four topologies, (b) the squared lower output power of the coupling coefficient of PS and PP topologies compared with those of SS and SP topologies, (c) the squared lower optimal loads of the coupling coefficient of SS and PS topologies compared with those of SP and PP topologies, (d) the constant unit power factor (CUPF) characteristics from the source in four topologies, (e) the constant current (CC) characteristics in SS and PP topologies, and the constant voltage (CV) characteristics in SP and PS topologies at the load variation around the optimal load. From these evaluations, both SS and SP topologies, which are superior in terms of the output power, are recommended when using the voltage source. Finally, the powering experiment in SS and SP topologies shows the effectiveness of these evaluations.
KW - Capacitive power transfer
KW - Pp topology
KW - Ps topology
KW - Sp topology
KW - Ss topology
KW - Wireless power transfer
UR - http://www.scopus.com/inward/record.url?scp=85106494853&partnerID=8YFLogxK
U2 - 10.1541/IEEJJIA.20008612
DO - 10.1541/IEEJJIA.20008612
M3 - Article
AN - SCOPUS:85106494853
SN - 2187-1094
VL - 10
SP - 339
EP - 347
JO - IEEJ Journal of Industry Applications
JF - IEEJ Journal of Industry Applications
IS - 3
ER -