PIEZOELECTRIC STICK-SLIP-MOTOR AND METHOD OF CONTROLLING SAME
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United States of America Patent
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Issued Date -
Oct 6, 2022
app pub date -
Aug 25, 2020
filing date -
Sep 6, 2019
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Abstract
The present disclosure relates to a piezoelectric stick-slip-motor and control method. An exemplary method to enable speed variation of the piezoelectric stick-slip-motor with a reduced noise generation, includes: applying a cyclic sawtooth-waveform drive voltage signal with a constant frequency in which the drive voltage (V) increases to and decreases from a peak voltage (Vp) for operating the motor with a constant speed; and changing the motor speed by gradually increasing or decreasing the gradient (dV/dt) of increasing the drive voltage (V) to the peak voltage (Vp) with each subsequent sawtooth-waveform drive voltage signal cycle (C) while keeping the frequency of the drive voltage signal constant.
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