System design for wireless powering of AUVs

In this work we focus on the influence of salt water as the medium between two coupling coils to design a wireless power transfer system. An electrical circuit model and an adequate characterization approach is presented to account for the power losses in the conductive medium. Optimum values for the load and efficiency of the power link are determined. Experimental results are provided to compare the performance of the coupling coils between different coupling mediums (air, fresh and salt water).

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“…which turns out to be slightly different from the case where r m is neglected due to finite k r [9].…”

Section: Characterization Of Coupling Coilsmentioning

confidence: 69%

Experimental Evaluation of Coupling Coils for Underwater Wireless Power Transfer

Duarte

Gonçalves

Silva

et al. 2019

2019 IEEE Wireless Power Transfer Conference (WPTC)

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“…Typical non‐polarized circular and square coils are simple in structure and have been widely used in various wireless charging products, while for both coils of the same wire length, the square coils produce a more uniform magnetic field distribution and have better tolerance to misalignment, which makes them more effective for applications where charging misalignment exists [18]. In this article, the design of the magnetic coupler is based on a typical square coil generating a non‐polarized magnetic field.…”

Section: Design Of Magnetic Coupler For Auvmentioning

confidence: 99%

Anti‐misalignment and lightweight magnetic coupler with H‐shaped receiver structure for AUV wireless power transfer

Qiao

Sun

Rong

et al. 2022

IET Power Electronics

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Inductive power transmission technology provides a new way to solve the energy problem of autonomous underwater vehicles (AUVs). The performance of the magnetic coupler determines the system transfer capacity. A novel open-type magnetic coupler with a simple structure, lightweight, strong anti-misalignment performance and high self-inductance stability is proposed for the arc-shaped shell of AUV. The proposed magnetic coupler employs an arc-shaped transmitter and the receiver uses an H-shaped ferrite core to realize the close coupling of magnetic flux in the vertical direction. The parameters of the magnetic coupler are optimized based on ANSYS Maxwell simulation, which ensures its coupling performance and anti-misalignment performance while minimizing the volume and weight of the receiver. To verify the proposal, a wireless charging system with a 183.9 g receiver is built. The maximum self-inductance change rate of the coil and maximum coupling coefficient change rate under the conditions of axial misalignment from −25 mm to 25 mm and rotational misalignment from −10 • to 10 • are 2.9% and 14.3%, respectively. In the case of full alignment, it can deliver 735.6 W at a DC-DC efficiency of 90.87%.

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“…The underwater sensor network is considered to have an homogenous geographical distribution across the seabed in the form of a linear string or alternatively with multiple rows in a matrix form as shown in Figure 2, where the distance between sensors (d s ) is defined as a linear variable ranging from 100 metres to 2000 metres. We assume that each sensor is equipped with (1) a wireless power transfer (WPT) receiver [1], which allows it to receive power wirelessly from an AUV, and (2) an optical wireless communications (OWC)e transceiver [2], which allows for collected sensor data to be transferred quickly to an AUV at a data-rate of 10 Mbit/s. We consider an average sensor power consumption ranging from 100 mW to 1 W, already taking into account the typical duty cycled operation of underwater sensors, as well as an average total data size of 100 Mbit to be collected in each visit.…”

Section: Underwater Sensor Networkmentioning

confidence: 99%