Abstract
This paper proposes an optimal power distribution method for multi-objective wireless power transfer (WPT) systems, aiming to improve the transmission flexibility and satisfy various power demands. Previous studies have barely explored the impact of wide-range and unpredictable variations of load parameters on the performance of multi-channel power transmissions. In this paper, by taking the impact of equivalent impedance, motion, power demand variation and response speed of charging object into consideration, an optimal power distribution scheme with fast response, high stability and high accuracy is proposed to satisfy various power demands from multiple objectives including portable electronics, moving electric vehicles (EVs), batteries and super capacitors, without using any communication networks. The effectiveness of the proposed control scheme is demonstrated by simulation results based on different charging cases and experimental results based on a 10 W prototype.
Highlights
Wireless power transfer (WPT) provides a brand new method for power transmission with salient advantages of cordless energization, multiple-channel transmission and flexibility by comparing with the traditional charging way
In order to further demonstrate the feasibility, stability, accuracy and response speed of the proposed power distribution scheme in different cases, four case studies are given in this paper, including Case 1 to verify the effectiveness of the proposed scheme; Case 2 to illustrate the multi-channel transmission performance by taking into account the variation of power demand; Case 3 to verify the response speed, accuracy and stability for charging moving electric vehicles (EVs) and Case 4 to demonstrate the effectiveness of the proposed scheme for charging batteries and super capacitors
Optimal power distribution is achieved through a four-step adjustment
Summary
Wireless power transfer (WPT) provides a brand new method for power transmission with salient advantages of cordless energization, multiple-channel transmission and flexibility by comparing with the traditional charging way. The inductive power transfer (IPT) utilizes the induced electromagnetic field to make the energy receptor harness the power over the air [1,2,3,4], which has been widely adopted for various applications, such as portable consumer electronics [5], implantable devices [6,7] etc. The combination of EV and WPT combine the advantages of both EV and WPT, and further eliminate the limitation of battery energy storage and charging [12,13]
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