Fast Tracking Electrosurgical Generator Using Two-Rail Multiphase Buck Converter With GaN Switches
Fast Tracking Electrosurgical Generator Using Two-Rail Multiphase Buck Converter With GaN Switches
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DOI：
10.1109/tpel.2016.2524642
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发表时间：
2017-01-01
影响因子：
6.7
通讯作者：
Maksimovic, Dragan
中科院分区：
文献类型：
--
作者：
Jensen, Scott;Maksimovic, Dragan
电外科涉及使用高频（通常为 100-500 kHz）交流电，通过等离子弧引起组织的临床反应（例如切割或烧灼）。标准电外科发生器 (ESG) 基于谐振逆变器，它限制了输出频率和波形。本文描述了一种快速跟踪 ESG，能够在一定频率范围内整形输出交流波形，从而提高电外科应用的灵活性和控制能力。所提出的快速跟踪 ESG 基于使用 GaN 开关的两轨多相降压拓扑。实验结果针对四相 ESG 原型，工作电压为 +/- 250 V，每相开关频率为 2 MHz，能够为建模为 300-4000 Omega 负载的电弧提供高达 50 W 的功率。
Electrosurgery involves the use of high-frequency (typically 100-500 kHz) alternating current to elicit a clinical response in tissue (e.g., cutting or cauterization) using a plasma arc. Standard electrosurgical generators (ESGs) are based on resonant inverters, which constrain the output frequency and waveshape. This paper describes a fast tracking ESG capable of shaping the output ac waveform over a range of frequencies, thus providing improved flexibility and control in electrosurgery applications. The proposed fast tracking ESG is based on a two-rail multiphase buck topology using GaN switches. Experimental results are given for a four-phase ESG prototype operating from +/- 250 V with 2-MHz per-phase switching frequency, capable of providing up to 50 W to an arc modeled as a 300-4000 Omega load.