Frequency splitting of underwater wireless power transfer

Niu, Wangqiang; Gu, Wenjin; Chu, Jianxin; Shen, Aidi

doi:10.1109/iwem.2016.7504900

Cited by 10 publications

(11 citation statements)

References 7 publications

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“…This section describes the phase operation of the transmitter and receivers. When the receiver coils operate under the resonant condition, the phases of the voltage and current at the transmitter coil do not affect the system's efficiency, according to (6). Additionally, the reflected resistance of the receiver coils is a real number, according to (20):…”

Section: Phase Manipulationmentioning

confidence: 99%

“…Wireless power transfer (WPT) is a promising technology that has attracted increasing attention in industry and academia. WPT has been applied to biomedical implants [1][2][3][4], underwater power supply systems [5,6], mining equipment [7,8], logistic robots [9], and electronic equipment [7]. The advantages of WPT are as follows: convenience, security, and robustness against complex environments and objects such as water and skin.…”

Section: Introductionmentioning

confidence: 99%

“…into(6) yields the approximate efficiency ηSIMP. To solve condition can be considered: when U1 satisfies (19), the system achieves optimal efficiency:…”

mentioning

confidence: 99%

See 2 more Smart Citations

Highly Efficient Target Power Control for Two-Receiver Wireless Power Transfer Systems

Cai

Tang

et al. 2018

Energies

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Multiple-receiver wireless power transfer (MRWPT) systems have revolutionary potential for use in applications that require transmitting power to multiple devices simultaneously. In most MRWPT systems, impedance matching is adopted to provide maximum efficiency. However, for most MRWPT systems, achieving target power levels and maximal efficiency is difficult because the target output power and maximum efficiency conditions are mostly not satisfied. This study establishes a target power control (TPC) strategy to balance providing target transfer powers and operating under high efficiency. This study is divided into the following points: First, this study derives the optimal mutual inductance to verify that it’s difficult for two-receiver wireless power transfer (WPT) system to achieve both maximum efficiency and power distribution simultaneously; Second, this study illustrates that for impedance matching method the mutual inductances play a more important role than equivalent impedances in increasing the system efficiency, and hence system should give priority in improving the mutual inductance as large as possible; Third, this study proposes a simplified system model which helps to derive the analytic solutions of equivalent impedances; Fourth, this study developed a 100-kHz two-receiver WPT system and establishes a TPC strategy for enabling the system to achieve target output power levels with high efficiency; At last, the proposed system is proved to achieve an efficiency level of more than 90 % and satisfies the target output power levels requirements.

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Section: Phase Manipulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Highly Efficient Target Power Control for Two-Receiver Wireless Power Transfer Systems

Cai

Tang

et al. 2018

Energies

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“…Wireless power transfer (WPT) is a promising technology that eliminates the need for transmission cables leading to electrical devices and makes power transfer more convenient. WPT technology has recently attracted increased attention in industry and academia where it has been widely applied to areas like underwater systems [1,2], biomedical implants [3][4][5][6], mining devices [7,8], smart robots [9], and electronic equipment [7]. With the increasing demands for embedding multiple electrical devices in a WPT system, the technologies in a multiple-receiver wireless power transfer (MRWPT) system are becoming advanced.…”

Section: Introductionmentioning

confidence: 99%

Time-Sharing Control Strategy for Multiple-Receiver Wireless Power Transfer Systems

Cai

Lai

et al. 2020

Energies

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The cross-coupling effect between the induction coils of a multiple-receiver wireless power transfer (MRWPT) system severely weakens its overall performance. In this paper, a time-sharing control strategy for MRWPT systems is proposed to reduce the cross-coupling between receiver coils. An active-bridge rectifier is introduced to the receivers to replace the uncontrollable rectifier to achieve synchronization of the time-sharing control. The synchronization signal generated by an active-bridge rectifier can be directly used to realize the synchronization of time-sharing control and hence saved the traditional zero-crossing point detection circuits for time-sharing circuits. Moreover, the proposed time-sharing system has the advantages of both operating under a resistance-matching condition and providing target output voltage for each receiver. Furthermore, a voltage control strategy was developed to provide both high efficiency and a target output voltage for each receiver. Finally, the simulation and experimental results show that the time-sharing MRWPT system reduced the cross-coupling effect between the receiver coils, and the voltage control strategy provided both a high efficiency and a target output voltage for each receiver.

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“…Several effective techniques have been carried out to maximize WPT system efficiency such as frequency tuning, intermediate field repeaters and impedance matching. In [1], Niu et al have used metamaterial to enhance WPT system efficiency in air medium. However, WPT technology in underwater environment, where seawater is a challenging medium, is still looking for interest from research fraternity.…”

Section: Introductionmentioning

confidence: 99%

A Review on Research Challenges, Limitations and Practical Solutions for Underwater Wireless Power Transfer

Mohsan¹,

Islam²,

Ali³

et al. 2020

IJACSA

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Wireless power transmission is the process to transmit electrical energy without using wire or any physical link. WPT is mainly used at such places where it is difficult to transfer energy using conventional wires. In this research work, we investigated the need and feasibility of wireless power transmission for underwater applications. This research paper will outline research challenges, limitations and practical consideration for underwater wireless power transfer (UWPT). Recent researchers have focused on WPT in air. However, WPT is still a challenging task in underwater environment. In this study, we have presented a review on previous research works in underwater wireless power transfer (UWPT). We have provided a comparison of different techniques implemented for wireless power transfer. This paper also proposes the idea of MIMO wireless power transmission for AUVs charging. This paper elaborates capabilities and limitations of the wireless power transfer system in underwater media as stochastic nature of ocean is a big challenge in wireless power transmission. We have also addressed design challenges and seawater effects on UWPT system.

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Frequency splitting of underwater wireless power transfer

Cited by 10 publications

References 7 publications

Highly Efficient Target Power Control for Two-Receiver Wireless Power Transfer Systems

Highly Efficient Target Power Control for Two-Receiver Wireless Power Transfer Systems

Time-Sharing Control Strategy for Multiple-Receiver Wireless Power Transfer Systems

A Review on Research Challenges, Limitations and Practical Solutions for Underwater Wireless Power Transfer

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