Constant power inverter with crest factor control
First Claim
1. An electrosurgical generator, comprising:
- a DC-DC buck converter configured to output a DC waveform, the DC-DC buck converter including at least one first switching element operated at a first duty cycle;
a DC-AC boost converter coupled to the DC-DC buck converter and including at least one second switching element operated at a second duty cycle, the DC-AC boost converter configured to convert the DC waveform to generate at least one electrosurgical waveform; and
a controller coupled to the DC-DC buck converter and the DC-AC boost converter and configured to;
adjust the first duty cycle and the second duty cycle to operate the at least one electrosurgical waveform in at least one of constant current, constant voltage, or constant power modes; and
adjust the second duty cycle to control a crest factor of the at least one electrosurgical waveform independent of the first duty cycle.
1 Assignment
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Accused Products
Abstract
An electrosurgical generator is provided. The generator includes a DC-DC buck converter configured to output a DC waveform, the DC-DC buck converter including at least one first switching element operated at a first duty cycle; a DC-AC boost converter coupled to the DC-DC buck converter and including at least one second switching element operated at a second duty cycle, the DC-AC boost converter configured to convert the DC waveform to generate at least one electrosurgical waveform; and a controller coupled to the DC-DC buck converter and the DC-AC boost converter and configured to adjust the first duty cycle and the second duty cycle to operate the at least one electrosurgical waveform in at least one of constant current, constant voltage, or constant power modes.
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Citations
20 Claims
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1. An electrosurgical generator, comprising:
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a DC-DC buck converter configured to output a DC waveform, the DC-DC buck converter including at least one first switching element operated at a first duty cycle; a DC-AC boost converter coupled to the DC-DC buck converter and including at least one second switching element operated at a second duty cycle, the DC-AC boost converter configured to convert the DC waveform to generate at least one electrosurgical waveform; and a controller coupled to the DC-DC buck converter and the DC-AC boost converter and configured to; adjust the first duty cycle and the second duty cycle to operate the at least one electrosurgical waveform in at least one of constant current, constant voltage, or constant power modes; and adjust the second duty cycle to control a crest factor of the at least one electrosurgical waveform independent of the first duty cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electrosurgical generator, comprising:
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a DC-DC buck converter configured to output a DC waveform, the DC-DC buck converter including at least one first switching element operated at a first duty cycle; a DC-AC boost converter coupled to the DC-DC buck converter and including at least one second switching element operated at a second duty cycle, the DC-AC boost converter configured to convert the DC waveform to generate at least one electrosurgical waveform; and a controller coupled to the DC-DC buck converter and the DC-AC boost converter and configured to; adjust the first duty cycle and the second duty cycle to switch operation of the at least one electrosurgical waveform between at least one of constant current, constant voltage, or constant power modes based on the first duty cycle; and adjust the second duty cycle to control a crest factor of the at least one electrosurgical waveform independent of the first duty cycle. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for controlling an electrosurgical generator, the method comprising:
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operating at least one first switching element of a DC-DC buck converter at a first duty cycle to output a DC waveform; operating at least one second switching element of a DC-AC boost converter coupled to the DC-DC buck converter at a second duty cycle to convert the DC waveform to generate at least one electrosurgical waveform; adjusting the first duty cycle and the second duty cycle to operate the at least one electrosurgical waveform in at least one of constant current, constant voltage, or constant power modes; and adjusting the second duty cycle to control a crest factor of the at least one electrosurgical waveform independently of adjusting the first duty cycle. - View Dependent Claims (17, 18, 19, 20)
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Specification