Method and system for programming and controlling an electrosurgical generator system

A programmable electrosurgical generator system having an RF output stage for outputting at least one RF operating waveform for performing an electrosurgical procedure, the programmable electrosurgical generator comprising:

• a sensor module having at least one sensor for sensing electrical and physical properties responsive to the application of the electrosurgical energy and generating electrical and physical property sensor data corresponding to the sensed electrical and physical properties;
• an inner loop system comprising means for changing at least one parameter of the at least one RF operating waveform to sculpt the at least one RF operating waveform based on sensor inputs received from the at least one sensor, the inner loop system including a control curve configured to selectively enable one of three modes of operation, the inner loop system configured to automatically switch between the three modes of operation based on feedback from the at least one sensor configured to sense load impedance and associated impedance breakpoints including Zlow and Zhigh, the three modes of operation selected from the group consisting of constant current, constant voltage and constant power, wherein the inner loop system computes a gain multiplier that is computed by taking an inverse of a voltage response corresponding to a sensed load impedance;
• an outer loop system comprising:
• means for determining a target value based on a predetermined target curve;
• means for performing at least one operating function of the electrosurgical generator,
• the outer loop system using the electrical and physical property sensor data and the target value as a parameters to employ the performing means, the outer loop system including an outer loop control module that controls outer loop gain, the outer loop control module multiplies the outer loop gain by the gain multiplying computed by the inner loop system to stabilize overall gain of the electrosurgical generator system despite variations in the sensed load impedance;
• and
• a configuration control system comprising means for modifying the inner and outer loop systems based on received input data,
• wherein the inner loop system is configured to generate a target signal and plot at least one graph based on the control curve such that the constant current mode is operable when the sensed load impedance is equal to or lower than Zlow, the constant power mode is operable when the sensed load impedance greater than Zlow and lower than Zhigh, and the constant voltage mode is operable when the sensed load impedance is equal to or greater than Zhigh.