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Performance Enhancement of an Ultrasonic Power Transfer System Through a Tightly Coupled Solid Media Using a KLM
1Laboratory for Microactuators, IMTEK - Department of Microsystems Engineering, University of Freiburg, Georges-Koehler-Allee 102, Room 02-087, 79110 Freiburg, Germany.
Micromachines
|April 3, 2020
Summary
Contactless ultrasonic power transmission (UPT) overcomes metal barriers that block electromagnetic methods. This study demonstrates efficient UPT through metal walls using piezoelectric transducers, validating theoretical models.
Area of Science:
- Physics
- Materials Science
- Electrical Engineering
Background:
- Metal barriers block electromagnetic wireless power transfer due to Faraday shielding.
- Contactless ultrasonic power transmission (UPT) offers a viable alternative for power delivery through metal obstacles.
Purpose of the Study:
- To demonstrate and optimize contactless ultrasonic power transmission through a metal barrier.
- To investigate the influence of acoustic properties of the transmitting medium on UPT performance.
- To validate theoretical models for UPT systems.
Main Methods:
- Utilized piezoelectric transducers to generate and receive ultrasonic waves.
- Applied the KLM model for transducer characterization and system modeling.
- Experimentally tested UPT through aluminum and polyoxymethylene (POM) walls.
- Determined optimal operating frequency and electrical load conditions.
Main Results:
- Achieved successful power transfer through metal walls using ultrasonic waves.
- Demonstrated good agreement between experimental results and theoretical predictions.
- Identified optimal operating frequencies and electrical loads for maximum power transfer in different media.
Conclusions:
- Contactless ultrasonic power transmission is effective for overcoming metal barriers.
- Accurate modeling and characterization are crucial for designing efficient UPT systems.
- The study provides a foundation for practical UPT applications in challenging environments.
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