A Hybrid CPT System Using Quadrature Double Horizontal Capacitive Couplers for High-Misalignment Tolerance and Constant Voltage Output

In capacitive power transfer (CPT) systems, coupling variations are inevitable due to air gap changes and misalignment between transmitting and receiving plates, which hinders constant output and optimal efficiency. This paper proposes a hybrid CPT system using quadrature double horizontal capacitiv...

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Bibliographic Details
Published in:IEEE transactions on power electronics pp. 1 - 12
Main Authors: Chen, Ting, Ma, Zhihui, Xu, Zhicheng, Wang, Fengxian, Zhang, Xian, Li, Guangyao, Zhao, Xuan, Wang, Yuqiao
Format: Journal Article
Language:English
Published: IEEE 2025
Subjects:
Capacitance
Capacitive power transfer (CPT)
Cleaning
constant voltage (CV)
Couplers
Couplings
high tolerance
hybrid topologies
Inductors
plate misalignment
quadrature double horizontal capacitive couplers (QDHCC)
Receivers
Robots
Topology
Transmitters
triple-effect multi-objective optimization method
Voltage
ISSN:0885-8993, 1941-0107
Online Access:Get full text
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Summary:In capacitive power transfer (CPT) systems, coupling variations are inevitable due to air gap changes and misalignment between transmitting and receiving plates, which hinders constant output and optimal efficiency. This paper proposes a hybrid CPT system using quadrature double horizontal capacitive couplers (QDHCC) for high-misalignment tolerance and constant voltage (CV) output. The system employs a hybrid compensation topology that combines LCLC-LC and LC-LCLC compensation topologies, based on structure of input-parallel-output-series (IPOS). QDHCC serve as the power transfer channels, achieving decoupling as the coupler moves along the X, Y, and Z axes. This design mitigates complex cross-couplings and ensures independence between the two power transfer channels. A tripleeffect multi-objective optimization method for compensation circuit parameters is proposed to further enhance the system's tolerance to misalignment, reduce the voltage stress on the coupler and improve system efficiency. The constant voltage output within predetermined misalignment distance is obtained. The alignment tolerance for adjustments along the X-axis and Y-axis is 40%, while it reaches 100% for the Z-axis. Finally, experimental results demonstrated the effectiveness of the proposed scheme with a maximum efficiency of 87.5%.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2025.3614976