Electrosurgical generator and method using a high permeability, high resistivity transformer
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United States of America Patent
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Issued Date -
Mar 20, 2008
app pub date -
Sep 15, 2006
filing date -
Sep 15, 2006
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Abandoned
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Abstract
A transformer which conducts or responds to a high voltage, high frequency electrosurgical output waveform has a core with a permeability in the range of 500-2000 and a resistivity in the range of 90,000-1,000,000 ohm centimeters and insulation on the secondary high voltage winding of at least 800 VAC per 0.001 inch thickness. The permeability and resistivity of the core enhance energy conversion, reduce parasitic capacitance to enhance the high frequency spectral energy content of the electrosurgical output waveform while simultaneously reducing leakage current, reducing the size of the transformer, enhancing manufacturing reproducibility and enhancing the ability to pass a high voltage safety test.
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