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This paper presents the development and implementation of an inductive, underwater wireless power transfer system for use with unmanned underwater vehicles (UUVs). Specifically, the design and fabrication of power transfer coils and power electronics is provided for a system capable of providing 75W to a load. At small standoff distances (<2 inches) and frequencies below 300kHz, it is shown that...
Wireless power transfer (WPT) is becoming more prevalent with a number of wireless charging devices now available in the consumer market for charging consumer electronics. The principle of wireless power transfer is based on the coupling of inductor coils to transfer energy between coils. In the past, two coils geometries were used to inductively transfer power. More recently, resonant power transfer...
This paper presents the electrical characterization of a coil in seawater for an undersea wireless power transfer system. A comparison is first made between Kraichman and Wait's expressions for the resistance of a coil in seawater. Then an experiment is performed by submerging a circular coil in seawater. A comparison is also made for a circular coil placed within a glass sphere and submerged in the...
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