Date of Award

Spring 1-1-2015

Document Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Electrical, Computer & Energy Engineering

First Advisor

Dragan Maksimovic

Second Advisor

Khurram Afridi

Third Advisor

Robert Erickson

Fourth Advisor

Won Park

Fifth Advisor

Daniel Friedrichs

Abstract

Electrosurgery is the use of high-frequency alternating current (AC) to illicit a clinical response in tissue (e.g., cutting or cauterization). Power-electronics converters have been demonstrated to generate the necessary output voltage and current for electrosurgery. The design goal of the converter is to regulate output power while supplying high-frequency AC. Standard electrosurgical generators (ESGs) are based on resonant inverters, which constrain the output frequency and waveshape. This work describes a fast tracking current driven ESG capable of shaping the output AC waveform over a range of frequencies, thus providing improved flexibility and control in electrosurgery applications.

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