Electrosurgical generator

Details Electrosurgical generator Electrosurgical generator

2005-08-02

2005-08-02

Cohen, Lee S. (Department: 3739)

Surgery

Instruments

Electrical application

C606S039000

Reexamination Certificate

active

06923804

ABSTRACT:
An electrosurgical generator which provides a constant power output particularly suited for cutting arc formation at an active electrode which exhibits a dynamic active surface area of varying geometry. Essentially constant power-based control is achieved through the utilization of a d.c. link voltage the level of which functions to establish the amplitude of the output of an RF resonant inverter. A dual loop feedback control is described wherein output power based control signals are slowly introduced at low gain, while link voltage based controls are comparatively rapidly applied. Enhanced development of a controlling d.c. link voltage is achieved through the utilization of an input network incorporating a power factor correction stage.

REFERENCES:
patent: 3952748 (1976-04-01), Kaliher et al.
patent: 5647869 (1997-07-01), Goble et al.
patent: 6277114 (2001-08-01), Bullivant et al.
patent: 6416509 (2002-07-01), Goble et al.
patent: 0754437 (1997-01-01), None

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