System and method for harmonic control of dual-output generators
AssigneesCovidien LP, University of Tennessee Research Foundation
InventorsDaniel A. Friedrichs, Daniel J. Costinett, Bradford C. Trento, Chongwen Zhao
Life of this patent
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Abstract
A dual-output generator is configured to output two or more waveforms at different frequencies. In particular, the dual-output generator is configured to provide low-frequency output, which may be suitable for ultrasonic surgical instruments, and a high-frequency output, which may be suitable for electrosurgical instruments, while reducing the amplitude of all remaining frequencies other than the two selected low and high frequencies to about zero.
Claims20
1-19. (canceled)
A method for controlling a dual-output electrosurgical generator, the method comprising:
- outputting a direct current (DC) waveform from a power supply;
- supplying a switching angle waveform to an inverter coupled to the power supply, the inverter including at least one switching element operated at a switching angle;
- and
- modulating by a controller the switching angle using dual-frequency selective harmonic elimination modulation to:
- simultaneously generate a first waveform at a first frequency and a secondary waveform at a second frequency, and
- eliminate at least one harmonic waveform between the first frequency and the second frequency.
A method for performing electrosurgery, the method comprising:
- outputting a direct current (DC) waveform from a power supply;
- supplying a switching angle waveform to an inverter coupled to the power supply, the inverter including at least one switching element operated at a switching angle;
- and
- modulating by a controller the switching angle using dual-frequency selective harmonic elimination modulation to:
- simultaneously generate a first waveform at a first frequency and a secondary waveform at a second frequency;
- and
- eliminate at least one harmonic waveform between the first frequency and the second frequency;
- outputting the first waveform through a first output;
- outputting the second waveform through a second output;
- energizing via the first waveform a first instrument coupled to the first output;
- and
- energizing via the second waveform a second instrument coupled to the second output.
Dependencies are inferred from the claim text.