Using ultrasonic waves to transfer power through metals

In this project, we are developing a permanent system for transferring power through a metallic system using ultrasonic waves. The system included a bonded transmitter and receiver sending ultrasonic power through an anodized aluminum wall. An efficient class E power amplifier was designed to be tightly integrated with the ultrasonic system (mechanical components) with minimal electronic components. The developed amplifier relied on the ultrasonic system for filtering its output signal. A complete power transfer system that includes the amplifier, the ultrasonic setup, and a full bridge rectifier was simulated and then experimentally verified. The system was able to deliver 17.5W of DC power to a 50 Ohm resistive load at a total DC-to-DC efficiency of 66%.

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