Abstract
Inductively coupled power transfer (ICPT) systems, which are superior to batteries due to their real-time power supplycapacity have been used in mooring buoys for the purpose of long-term measurements. A multiple-receiver ICPT system for mooring buoys, which contains a mooring cable for transmitting power, is proposed in this paper to obtain the corresponding profile parameters. Series compensation is applied to all three sections, including the transmitter, the mooring cable and multiple receivers. The voltage of an underwater system with arbitrary load can be stabilized. On that basis, high efficiency can be obtained. By adopting Wolfram Mathematica a detailed analysis of both double-receiver and multiple-receiver ICPT systems for mooring buoys is presented. Finally, a prototype ICPT system with three receivers mounted on a 30 m mooring cable was built to verify the theoretical analysis. Experimental results show that the power transfer efficiency exceeds 45%. Both theoretical analysis and experiments indicate that this system is appropriate for measuring ocean profile parameters.
Highlights
Covering approximately 71% of the Earth’s surface and representing 90% of the Earth’s biosphere, oceans play a major role in the world [1]
Based on Faraday’s law, a high frequency magnetic field is generated in the abovewater inductive (AIC), and the power is transmitted by the mooring cable
The multiple-receiver inductively coupled power transfer (ICPT) system for a mooring buoy, which is similar to a two-receiver system, is shown as Figure 7
Summary
Covering approximately 71% of the Earth’s surface and representing 90% of the Earth’s biosphere, oceans play a major role in the world [1]. Coreless planar transformers were applied in the system to reduce core losses This system is suitable for portable electric equipment rather than underwater devices mounted on a mooring cable. A multiple-receiver ICPT system for mooring buoys is proposed, which is designed to realize the stable voltage and high efficiency of underwater systems by using series compensation for all loops based on mathematical derivation. For the prototype ICPT system with three receivers mounted on a 30 m mooring cable, the voltage division ratio between two arbitrary receivers is almost 1, while the power transfer efficiency can exceed 45%. The system proposed in this paper can be applied for measuring profile parameters in real-time, and will provide a reference for the development of multiple-receiver ICPT systems.
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