RF surgical generator and method for driving an RF surgical generator

摘要

Until now, ohmic consumers have been used to abruptly complete the output signal in RF surgical generators. Considering an RF surgical generator comprising a power supply with at least one storage capacitor and a controllable switching device with at least one energy storage device (e.g., a transformer) by which an RF output signal that can be delivered to an RF surgical instrument is generated, it is suggested herein that a regenerative device be provided between the energy storage device and the storage capacitor. Furthermore, a control mechanism is used for controlling the switching device and the regenerative device such that, if the RF output signal is to be completed, the regenerative device is energized for at least part of the time, and the energy storage is at least partially discharged in the storage capacitor.

主权项

1. A radio frequency (RF) surgical generator comprising:
a power supply comprising at least one storage capacitor; a controllable switching device comprising at least one energy storage device by which an RF output signal that can be delivered to an RF surgical instrument is generated; a regenerative device connected between the energy storage device and the storage capacitor; and a control means for controlling the switching device and the regenerative device such that, if the RF output signal is to be completed, the regenerative device is energized for at least part of the time, and the energy storage device is at least partially discharged to the storage capacitor, wherein the regenerative device comprises a step-down chopper whose input voltage is regulated to a constant voltage using an electronic switch.