Design of a GaN based high frequency inverter for electrosurgery

In this work, high frequency class DE resonant inverter design based on GaN is presented for electrosurgery. Due to its resonant structure, the inverter is suitable for wide range voltage regulation and the use of GaN elements provides high efficiency and high-power density. For three different cutting modes of electrosurgery (pure cutting, blend, coagulation), the operating frequency is selected as 500 kHz. As a result of the technical analysis and simulation for the proposed class DE resonant inverter, an experimental setup was designed and implemented in the laboratory. The efficiency performance over a given load range is analysed. Finally, these three different cutting modes are evaluated on a real tissue load.