Low-voltage,High-current and High Distance-diameter Ratio Wireless Power Transfer System Based on Three-stage Scalable Multi-module Parallel Architecture
Low-voltage,High-current and High Distance-diameter Ratio Wireless Power Transfer System Based on Three-stage Scalable Multi-module Parallel Architecture
In high-power and high distance-diameter(d-D)ratio wireless power transfer(WPT)applications,it is very difficult to design the power switches and resonant components due to high current caused by quite low coupling coefficient between transmission coils.In this paper,a novel three-stage scalable multi-module parallel WPT architecture is proposed for low voltage and high current applications.Then,the transfer characteristics are presented through the model of a dual-module parallel system by the fundamental harmonic analysis method.Furthermore,three output-stage structures and the corresponding control schemes are compared to optimize the system performance.Moreover,a parameter design method for the coil-stage is proposed to reduce the voltage and current stress and realize zero voltage switching(ZVS)in the input-stage.Finally,a 1 kW MCR WPT prototype with the d-D ratio of 1(30 cm/30 cm)is built and the experiments on three different output-stage topologies are carried out to compare their performance,and the maximum efficiency is 75.2%.
关键词
磁谐振式无线电能传输/多模块并联/高距径比/低压/大电流
Key words
magnetically coupled resonant(MCR)wireless power transfer(WPT)/multi-module parallel/high distance-diameter ratio/low voltage/high current
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