Abstract

Wireless Power Transfer (WPT) for autonomous underwater vehicles (AUVs) has been a research focus in recent years. This paper studies the inductor-capacitor-capacitor and parallel (LCC-P) compensation topology to achieve a compact receiver for AUVs. Unlike the series-series (SS) compensation topology, the LCC-P topology retains the advantages of the double-sided LCC topology and has a more compact receiver than the double-sided LCC topology with fewer elements used on the receiver side. The analytical model of such a WPT system is established to analyze the output power and transfer efficiency. The LCC-P topology has a higher efficiency compared to the SS topology due to the smaller conduction loss of the inverter. Moreover, a method of eliminating the DC filter inductor L0 is proposed to further decrease the size and weight of the receiver. The amplitude of the withstanding voltage on the receiver compensation capacitor without L0 is approximately decreased by 40% compared to that with L0. Both cases of with and without L0 have a constant current output and the peak efficiency without L0 is about 94%, which is 1% lower than that with L0. A prototype was built and the experimental results verified the theoretical analysis.

Highlights

  • Wireless Power Transfer (WPT) technology is growing in popularity in recent years due to its non-physical connection between the source and the load [1,2,3], and it has been widely used in diverse scenarios, such as toothbrushes, cell phones [4], electrical vehicles [5], and autonomous underwater vehicles (AUVs) [6,7,8]

  • Weight, and cost of the receiver side and reserve the merits of double-sided LCC compensation topology, this paper studies LCC-P

  • It can be seen that the battery current keeps constant with the increasing battery voltage, which indicates that the WPT system with LCC-P compensation topology has a constant current output under both cases

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Summary

Introduction

Wireless Power Transfer (WPT) technology is growing in popularity in recent years due to its non-physical connection between the source and the load [1,2,3], and it has been widely used in diverse scenarios, such as toothbrushes, cell phones [4], electrical vehicles [5], and autonomous underwater vehicles (AUVs) [6,7,8]. Weight, and cost of the receiver side and reserve the merits of double-sided LCC compensation topology, this paper studies LCC-P compensation topology, which has the advantages of resonant frequency independent of the coupling coefficient and load, constant primary current, and constant current output. It has the merit of fewer additional components on the receiver side, meaning a smaller size and a lower cost compared with the double-sided LCC topology.

Circuit Analysis
Theoretical Analysis
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Eliminating
Comparison
LCC-P compensation Topology
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12 FOR3PEER REVIEW
Findings
Conclusions
Full Text
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