Omnidirectional Magnetic Resonant Extender Design for Underwater Wireless Charging System

Area of Science:

• Electrical Engineering
• Ocean Engineering
• Wireless Power Transfer

Background:

• Long-range underwater wireless power transfer (WPT) faces challenges like signal decay and output fluctuation due to unstable water environments.
• Conventional WPT systems struggle with efficiency and stability in dynamic underwater conditions.

Purpose of the Study:

• To develop a novel underwater WPT system with an enlarged resonance range, higher efficiency, and stable output.
• To overcome limitations of existing systems in terms of transmission distance, efficiency, and environmental adaptability.

Main Methods:

• Utilized an LCC-S-S compensation circuit for a stable primary current and improved fault tolerance.
• Designed a portable omnidirectional magnetic resonant extender with complementary three-coil WPT systems.
• Conducted theoretical analysis, circuit simulations, finite element analysis (FEA), and experimental validation.

Main Results:

• The LCC-S-S circuit enhances fault tolerance in unstable underwater environments.
• The magnetic resonant extender successfully extends transmission distance and improves system efficiency.
• The system maintains constant load current magnitude and phase under varying water flow conditions.
• Experimental results confirm high transmission efficiency across wide lateral and angular misalignments (-90° to +90°).

Conclusions:

• The proposed underwater WPT system offers a robust solution for long-range, stable, and efficient power transfer.
• The novel design effectively addresses dead zones and environmental instability, demonstrating high fault tolerance.
• This technology holds significant promise for various industrial applications in underwater environments.