UCLA

This thesis presents a comprehensive theory of wireless power transfer via inductive links. Design-oriented analysis is used to offer a different and insightful perspective. This thesis analyzes different architectures of wireless power transfer and different ways to realize stable power delivery over distance variations. Among various techniques for maintaining stable power delivery, a frequency-adapting architecture is proposed and implemented, in which an oscillator is used as the driver as compared with the traditional implementation of using power amplifier as the driver. The experimental results indicate that oscillator driven wireless power transfer system could self-tune to the optimal frequency and maintain stable power delivery over distance variation at a high power transfer efficiency.