Crest-factor control of phase-shifted inverter
First Claim
1. A method for controlling an electrosurgical generator, the method comprising:
- generating at least one electrosurgical waveform at a selected energy setting through an RF output stage comprising an RF inverter coupled to a power source, the at least one electrosurgical waveform having a duty cycle and a crest factor;
adjusting a repetition rate of the at least one electrosurgical waveform based on the selected energy setting to regulate the duty cycle of the at least one electrosurgical waveform;
applying the at least one electrosurgical waveform to tissue through at least one electrode;
measuring an output voltage of the at least one electrosurgical waveform; and
supplying a control signal to the RF inverter based on the repetition rate when the output voltage is increasing to regulate the crest factor of the at least one electrosurgical waveform.
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Abstract
A method for controlling an electrosurgical generator includes generating at least one electrosurgical waveform at a selected energy setting through an RF output stage comprising an RF inverter coupled to a power source. The at least one electrosurgical waveform has a duty cycle and a crest factor. The method also includes adjusting a repetition rate of the at least one electrosurgical waveform based on the selected energy setting to regulate the duty cycle of the at least one electrosurgical waveform. The method also includes applying the at least one electrosurgical waveform to tissue through at least one electrode and measuring an output voltage of the at least one electrosurgical waveform. The method also includes supplying a control signal to the RF inverter based on the repetition rate when the output voltage is increasing to regulate the crest factor of the at least one electrosurgical waveform.
904 Citations
20 Claims
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1. A method for controlling an electrosurgical generator, the method comprising:
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generating at least one electrosurgical waveform at a selected energy setting through an RF output stage comprising an RF inverter coupled to a power source, the at least one electrosurgical waveform having a duty cycle and a crest factor; adjusting a repetition rate of the at least one electrosurgical waveform based on the selected energy setting to regulate the duty cycle of the at least one electrosurgical waveform; applying the at least one electrosurgical waveform to tissue through at least one electrode; measuring an output voltage of the at least one electrosurgical waveform; and supplying a control signal to the RF inverter based on the repetition rate when the output voltage is increasing to regulate the crest factor of the at least one electrosurgical waveform. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electrosurgical generator, comprising:
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an RF output stage comprising an RF inverter coupled to a power source, the RF output stage configured to generate at least one electrosurgical waveform at a selected energy setting, the at least one electrosurgical waveform having a duty cycle and a crest factor; a controller configured to adjust a repetition rate of the at least one electrosurgical waveform based on the selected energy setting to regulate the duty cycle of the at least one electrosurgical waveform; and a sensor configured to measure an output voltage of the at least one electrosurgical waveform, the controller configured to supply a control signal to the RF inverter based on the repetition rate when the output voltage is increasing to regulate the crest factor of the at least one electrosurgical waveform. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An electro surgical system, comprising:
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an electrosurgical generator comprising; an RF output stage comprising an RF inverter coupled to a power source, the RF output stage configured to generate at least one electrosurgical waveform at a selected energy setting, the at least one electrosurgical waveform having a duty cycle and a crest factor; a controller configured to adjust a repetition rate of the at least one electrosurgical waveform based on the selected energy setting to regulate the duty cycle of the at least one electrosurgical waveform; and a sensor configured to measure an output voltage of the at least one electrosurgical waveform, the controller configured to supply a control signal to the RF inverter based on the repetition rate when the output voltage is increasing to regulate the crest factor of the at least one electrosurgical waveform. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification