Design of A GaN Based High Frequency Inverter for Electrosurgery

Öz

Electrosurgery performs cutting and coagulation procedures using high energy and high frequency electric current. It reduces bleeding during surgical interventions, shortens the operation time and accelerates the healing process. In this study, a GaN based high frequency full bridge class DE resonant inverter design is proposed for use in electrosurgery. The proposed inverter provides AC voltage at high frequencies and the switches operate with ZVS (Zero Voltage Switching) at low voltage stress. In addition, the use of GaN elements provides high efficiency and high-power density. The operating frequency is selected as 500 kHz for three different cutting modes of electrosurgery. After the technical analysis and simulation studies of the high frequency class DE resonant inverter, an experimental setup was designed and implemented in a laboratory environment. The efficiency performance over a variable load range is analysed. Finally, pure cutting, blend and coagulation modes are tested on the different loads, potato - chicken breast - liver, simulating real tissue. On the potato load for pure cutting mode, the output voltage is 39.9 V and the output current is 0.7 A while an efficiency of 35%.

Anahtar Kelimeler

• electrosurgery
• high frequency
• GaN
• resonant inverter

Destekleyen Kurum

Pamukkale University

Proje Numarası

2022FEBE042

Etik Beyan

The author(s) of this article declare that the materials and methods used in this study do not require ethical committee permission and/or legal-special permission.

Teşekkür

This study is support by Pamukkale University under grant number 2022FEBE042.

Elektrocerrahi için GaN Tabanlı Yüksek Frekanslı Bir İnverter Tasarımı

Öz

Elektrocerrahi, yüksek enerji ve yüksek frekanslı elektrik akımı kullanarak kesme ve pıhtılaşma işlemlerini gerçekleştirir. Cerrahi müdahalelerde kanamayı azaltır, operasyon süresini kısaltır ve iyileşme sürecini hızlandırır. Bu çalışmada elektrocerrahide kullanılmak üzere GaN tabanlı yüksek frekanslı tam köprü DE sınıfı rezonans inverter tasarımı önerilmektedir. Önerilen dönüştürücü yüksek frekanslarda AC gerilim sağlamakta ve anahtarlar düşük gerilim stresinde ZVS (Sıfır Gerilim Anahtarlama) ile çalışmaktadır. Ayrıca GaN elemanlarının kullanılması yüksek verim ve yüksek güç yoğunluğu sağlamaktadır. Elektrocerrahinin üç farklı kesme modu için çalışma frekansı 500 kHz olarak seçilmiştir. Yüksek frekanslı DE sınıfı rezonans inverterin teknik analiz ve simülasyon çalışmalarının ardından bir deney düzeneği tasarlanmış ve laboratuvar ortamında uygulanmıştır. Değişken bir yük aralığında verimlilik performansı analiz edilmiştir. Son olarak, saf kesme, harmanlama ve koagülasyon modları, gerçek dokuyu simüle eden patates - tavuk göğsü - karaciğer gibi farklı yükler üzerinde test edilmiştir. Saf kesme modu için patates yükünde, çıkış gerilimi 39,9 V ve çıkış akımı 0,7 A iken verimlilik %35'tir.

Anahtar Kelimeler

• elektrocerrahi
• yüksek frekans
• GaN
• rezonans inverter

Destekleyen Kurum

Pamukkale Üniversitesi

Proje Numarası

2022FEBE042

Etik Beyan

Bu makalenin yazar(lar)ı çalışmalarında kullandıkları materyal ve yöntemlerin etik kurul izni ve/veya yasal-özel bir izin gerektirmediğini beyan ederler.

Teşekkür

Bu çalışma Pamukkale Üniversitesi tarafından 2022FEBE042 proje numarasıyla desteklenmektedir.

Kaynakça

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