Method and apparatus for driving piezoelectric motors
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United States of America Patent
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Dec 9, 2003
Grant Date -
N/A
app pub date -
Apr 24, 2001
filing date -
Oct 25, 1998
priority date (Note) -
Expired
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Abstract
A method is provided for exciting vibrations in a piezoelectric motor having a plurality of electrode sets, each set comprising at least one first electrode and at least one second electrode between which AC voltages are applied to excite vibrations in the piezoelectric motor, the method comprising: coupling an AC power source to the at least one first electrode and at least one second electrode of a first electrode set; electrically connecting the at least one first electrode to the at least one second electrode of a second set of electrodes with a non-zero impedance that is substantially less than an impedance between them resulting from stray capacitive coupling; and energizing the power source to apply an AC voltage difference between the at least one first electrode and at least one second electrode of the first set of electrodes to excite the vibrations.
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