Summary: | 碩士 === 國立臺灣海洋大學 === 電機工程學系 === 94 === Abstract
The purpose of this thesis is to design the batteryless telemetry system which can transmit energy and return signals via a pair of coupled coils. The batteryless telemetry system comprises a transponder and a reader. The reader which uses a Class E inverter as power driver can transmit energy to transponder via electromagnetically coupled coils and simultaneously receives sensed signals with load-shift keying modulation returns from transponder. Moreover, the reader converts the series of sensed signals to digital data and transfers the digital data to host computer by RS-232 communication protocol for further data analyzing.
In order to improve the efficiency of power delivery, the Class E inverter must operate in zero-voltage-switching to reduce switching loss. So, in this thesis, we discuss the conditions of zero-voltage-switching of Class E inverter and compare the effects of every component varying in the Class E circuit and then tune the switching frequency and the duty cycle.
In the cause of wireless energy transmitting and signal feedback, we change the tuned inductor in Class E inverter into a pair of coupled coils. Also, we illustrate the effect of power delivered efficiency and coupling coefficient of the coupled coils when the geometry position of coils changes.
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