Resonant converter tuning for maintaining substantial constant phaco handpiece power under increased load
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United States of America Patent
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Jan 18, 2011
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N/A
app pub date -
Nov 18, 2005
filing date -
Nov 20, 2001
priority date (Note) -
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Abstract
A phacoemulsification system includes a phacoemulsification handpiece including a cutting tip ultrasonically vibrated by an ultrasonic transducer. A power supply is provided for driving the ultrasonic transducer at a resonant frequency of the transducer and cutting tip and varying power to the transducer, in response to loading of the cutting tip, by phase shifting voltage and current supplied to the transducer.
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