Wireless Energy Transfer Through Strongly Coupled Resonances
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2013
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Swarthmore College. Dept. of Engineering
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Thesis (B.A.)
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Abstract
Using two 16cm diameter coils tuned to resonant frequency in a strongly coupled regime, I
investigate various properties of this system that affect power output such as frequency, load
resistance, and distance between the coils. It is found that there is an optimal frequency in the
range of 3.6-3.8 kHz and load resistance 120-I50Ω in which the power output for the system is
maximal. In relation to distance, power output decreases rapidly, becoming negligible if the coils
are separated by more than 10cm. The highest power achieved was 128mW. Via detailed
simulation done through MultiSim, it is established that experimental results match closely with
simulated ones. Further calculations were performed to verify other quantities such as mutual
and self-inductance. My results indicate that wireless power transfer is viable and can indeed be
practical for medium-ranged applications.