A UUV Underwater Wireless Power Transfer System

The difficulty of fast and efficiently supplied of energy has become one of the key factors restricting the endurance of unmanned underwater vehicles (UUV). Underwater Wireless Power Transfer technology is proposed as a new approach to solve the problem which is efficiently supplied of energy for UUV. This paper focuses on the impact mechanism of seawater medium and underwater special environment on UUV Wireless Power Transfer systems. Firstly, detailed analysis is conducted, and optimization design methods for system parameters are provided, in terms of the impact of operating frequency on system performance. Then, a topology and primary-secondary bilateral control strategy with wide range regulation are proposed to achieve wide range regulation for stable output, which are suitable for underwater environments. Finally, an engineered prototype of UUV Wireless Power Transfer is developed, achieving stable wireless charging for 24 V battery pack with 6.5 cm transmitting distance, at 100 W transmitting power and 88% transmitting efficiency.