Journal ArticleDOI
Capacitive Power Transfer System With a Mixed-Resonant Topology for Constant-Current Multiple-Pickup Applications
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TLDR
In this article, a mixed-resonant topology consisting of a CLC resonant circuit on the primary side and a T- CLC circuit on secondary side for multiple pickups constant current output applications was proposed.Abstract:
Capacitive power transfer (CPT) systems based on high-frequency electric field coupling have attracted much attention recently due to their simplicity and low eddy-current losses. This paper proposes a mixed-resonant topology consisted of a Π- CLC resonant circuit on the primary side and a T- CLC circuit on the secondary side for multiple pickups constant current output applications. The voltage gain, current gain, and zero phase angle frequency at different operating modes of Π- CLC and T- CLC circuits are analyzed by fundamental frequency approximation, and the conditions leading to a constant output current independent of loads are determined. Based on the analysis, a design method to determine the resonant network parameters is proposed according to the required output current of each pickup. A prototype with three pickups has been designed and built, and both simulation and experimental results have demonstrated that the proposed multiple-pickup CPT system can output a constant current at each operating power pickup against the load variations of itself and others.read more
Citations
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Journal ArticleDOI
A Review on the Recent Development of Capacitive Wireless Power Transfer Technology
Fei Lu,Hua Zhang,Chris Mi +2 more
TL;DR: In this article, the authors reviewed the latest developments in capacitive power transfer (CPT) technology, focusing on two key technologies: the compensation circuit topology and the capacitive coupler structure.
Journal ArticleDOI
A Two-Plate Capacitive Wireless Power Transfer System for Electric Vehicle Charging Applications
Fei Lu,Hua Zhang,Chris Mi +2 more
TL;DR: In this article, a two-plate capacitive wireless power transfer (CPT) system for electric vehicle charging applications is proposed, where the vehicle chassis and the earth ground are used to transfer power.
Journal ArticleDOI
Unified Load-Independent ZPA Analysis and Design in CC and CV Modes of Higher Order Resonant Circuits for WPT Systems
TL;DR: In this article, a general unified methodology for arbitrary higher-order resonant circuits is proposed to realize the load-independent constant current (CC) and constant voltage (CV) outputs at two different loadindependent zero phase angle (ZPA) frequencies.
Journal ArticleDOI
Analysis and Design of Inductive and Capacitive Hybrid Wireless Power Transfer System for Railway Application
TL;DR: An inductive and capacitive hybrid wireless power transfer (HWPT) system is proposed to improve the system coupler antimisalignment ability and a scaled-down system is built to validate the performance of the proposed approach.
Journal ArticleDOI
Realizing Constant Current and Constant Voltage Outputs and Input Zero Phase Angle of Wireless Power Transfer Systems With Minimum Component Counts
TL;DR: A unified resonant tuning configuration with minimum passive component counts is proposed to achieve CC and CV outputs at two ZPA operating frequencies and, according to the proposed configuration, all the possible inductive power transfer and capacitive power transfer topologies are analogized.
References
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Journal ArticleDOI
A Survey of Wireless Power Transfer and a Critical Comparison of Inductive and Capacitive Coupling for Small Gap Applications
Jiejian Dai,Daniel C. Ludois +1 more
TL;DR: In this paper, a critical comparison of IPT and CPT for small gap applications is provided, wherein the theoretical and empirical limitations of each approach are established, and guidelines for selecting IPT or CPT in small gap systems are presented.
Journal ArticleDOI
Design for Efficiency Optimization and Voltage Controllability of Series–Series Compensated Inductive Power Transfer Systems
TL;DR: In this article, the relationship among compensation parameters, circuit efficiency, voltage transfer function, and conduction angle of the input current relative to the input voltage are studied, and a design and optimization method is proposed to achieve a better overall efficiency as well as good output voltage controllability.
Journal ArticleDOI
A Double-Sided LCLC -Compensated Capacitive Power Transfer System for Electric Vehicle Charging
TL;DR: In this paper, a double-sided LCLC -compensated capacitive power transfer (CPT) system is proposed for the electric vehicle charging application, where two pairs of metal plates are utilized to form two coupling capacitors to transfer power wirelessly.
Journal ArticleDOI
Effective Capacitive Power Transfer
TL;DR: In this paper, a CPT system is presented that achieves many times higher power throughput into low-impedance loads than traditional systems with the same interface capacitance and frequency of operation and with reasonable ratings for the switching devices.
Journal ArticleDOI
A Methodology for Making a Three-Coil Wireless Power Transfer System More Energy Efficient Than a Two-Coil Counterpart for Extended Transfer Distance
TL;DR: In this article, a three-coil wireless power transfer system is proposed to maximize the magnetic coupling with the receiver coil for efficient power transfer, and the theoretical proof and the conditions for meeting the objective are derived and practically verified in a practical prototype.
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