Specialized Circuit Drives 150-V Piezoelectric Motor Using Low-Voltage Op Amp

摘要

A piezoelectric motor is a linear motor with bidirectional motion. It uses friction to grip the armature while a voltage is ramped to warp the piezoelectric material and move the armature. The voltage then is quickly removed. As the material springs back, it breaks away from the armature and returns to its zero position, leaving the armature a few micrometers further along its track. Repeat this at a kilohertz rate and for thousands of times.