Browsing by Author "Toibekkyzy, Aidana"

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    UNDERWATER WIRELESS POWER TRANSFER MODELLING AND SIMULATION (STUDY ON FOREIGN METAL OBJECTS)
    (Nazarbayev University School of Engineering and Digital Sciences, 2024-04) Toibekkyzy, Aidana
    For a long time, the Autonomous Underwater Vehicle (AUV) has played a vital role in deepsea investigations and the exploration of ocean resources. However, the primary concern related to underwater vehicles is the lack of sufficient battery capacity to sustain their numerous high-power sensors and their durable autonomous activities under the sea. In comparison with the traditional methods of powering AUVs, the Wireless Power Transfer (WPT) systems ensure the transfer of electricity without any usage of cables or wires. It ensures a prolonged mission duration and mobility of AUV, increasing its performance. Eliminating the plugging-in and -out procedures, the WPT technology provides a safe and practical solution for powering AUVs. However, there are a number of factors of the seawater medium that cannot be manually controlled. Such considerations make it complex to model a system able to transfer power with adequate efficiency. Therefore, this thesis analyzes an underwater WPT system and investigates its behavior under different conditions of the surrounding environment. It provides a quantitative analysis of the influence of the environment, external objects, and misalignment between the resonators on the electrical properties of the coil and the performance of the underwater WPT system. This is performed by testing the WPT in different media, namely in air, seawater, and more conductive water; testing in the presence of objects with different material types, sizes, thicknesses, and shapes; as well as testing the model when coils are not perfectly aligned. The results suggest that the conductive environment causes more eddy current generation, decreasing the efficiency of WPT. The placement of foreign objects differently affects the system, depending on the induced eddy currents on them, the magnetization effect, and how localized the magnetic field is around the coil.