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

Abstract

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%.

Design of LCC-P Constant Current Topology Parameters for AUV Wireless Power Transfer

“…In this paper, an AUV-WPT system with a rated power of 700 W is designed. The parameters L p , L S and M of the H-shaped magnetic coupler proposed in [17] are fixed. Therefore, it is only necessary to add the coil inductance constraints to the genetic algorithm, which will not affect the correctness of the parameter optimization proposed in this paper.…”

“…The space inside the AUV is very limited, which puts forward high requirements on the weight and volume of the receiver of the system, that is, the receiver should be as compact as possible, including the optimization of the magnetic coupler [7][8][9], compensation topology select [10][11][12][13][14][15][16], etc. The magnetic coupler selects the arc shaped transmitter and the Hshaped structure receiver proposed by [17], which not only occupies a small volume but also has the characteristics of light weight. The function of the compensation topology is to adjust the reactive power in the system by adding inductive or capacitive elements, thereby improving the transmission efficiency.…”

A Calculation Method for the Maximum Transmission Power in ICPT Systems Under Non-Sinusoidal Excitation

“…This transmission method alleviates challenges associated with disorderly power lines, addresses the security limitations of conventional power supply methods, and offers increased flexibility. ICPT finds widespread application in various domains, including power supplies for underwater machinery [2][3], consumer electronics [4], medical implants [5][6], and electric vehicles [7][8].…”