Abstract
The application of wireless power transfer technology in the underwater environment proposes both opportunities and challenges to undersea power feeding. Due to the attenuation of electromagnetic waves in seawater, the distance between transmitter and receiver is always maintained at a minimum value, which results in tight coupling between the transmitter and receiver. The tight coupling condition provides a low impedance loop for high-order harmonic, so the component of the harmonic wave is thus significantly increased and cannot be ignored in the power transmission system. In order to fully utilize the harmonic energy, a fundamental-harmonic dual-channel system was proposed and studied in this paper. Compared with single-channel systems transmitting fundamental wave only, the dual-channel system has higher power transmission capability, while the loss in dual channel system can be less than that of a single-channel system after proper optimization. A 3 kW experiment platform is established to verify the effectiveness of theoretical analysis.
Highlights
The development of underwater robotics is an important field of research and a promising industrial application since it represents a sustainable solution to exploit ocean resources with a reasonable environmental impact [1]
Due to the attenuation of electromagnetic wave in seawater [10,11,12], the distance between transmitter and receiver is maintained at a minimum value, which results in tight coupling between the transmitter and receiver(the coupling coefficient is greater than 0.5), so the underwater inductive power transfer system is a strong coupling system [13,14,15,16,17]
A 3 kW underwater wireless power transfer (UWPT) platform is established to verify the effectiveness of theoretical analysis
Summary
The development of underwater robotics is an important field of research and a promising industrial application since it represents a sustainable solution to exploit ocean resources with a reasonable environmental impact [1]. This paper proposes a dual resonant frequency inductive power transfer system, in which the fundamental and third harmonic waves are transferred simultaneously. A scheme that amplifies both the fundamental and tween transmitter and receiver is maintained at a minimum value, which results in tight third harmonic generated by a full-bridge inverter was proposed to implement the double-frequency coupling between the transmitter and receiver(the coupling coefficient is greater than. This paper proposes a dual resonant fresnubbers for power switch devices are necessary, and their effectiveness has been verified quency inductive power transfer system, in which the fundamental and third harmonic in previous literature [27]. A GaN (Gallium nitride)-based programmable pulse width modulation [22] and a concurrent transmitter consisting of two independent transmitters [23] were proposed and implemented to support the dual-mode WPT operation. A scheme that amplifies both the fundamental and third harmonic generated by a full-bridge inverter was proposed to implement the dou2.1
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