Accurate Motion provided by Piezoelectric Motor Without Gears or Magnets

When engineers hear the word “motor,” they will typically think of “electromagnetic.” Traditional motors use coils and magnetic materials to provide rotary or linear motion. The alternative to the electromagnetic motor which is finding its way into an increasing number of applications is the piezoelectric motor, also called a piezoelectric actuator or piezo motor. Its principles of operation is the well-known piezoelectric effect.

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Electronic Driver – Piezo Motors

two square blue LED lights

The piezo drive scenario is the complement of the electromagnetic drive, where current drive is needed and voltage is a consequence; here, voltage is what is needed, and current is the consequence. The piezo driver must supply the needed voltage (not current) into a capacitive (not inductive) load, and it must control and modulate this voltage to force the desired crystal elongation. In other words, current is the independent parameter and voltage is reliant on parameter for conventional motors, but for piezo motors, the situation is the opposite.

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Piezoelectric Motors – the Better Alternative

Piezoelectric motors have evolved from their beginnings in laboratories to use in mass production industrial applications. Modern piezo motor designs provide a higher level of performance from a smaller size, produce higher resolution movement, and require less power and energy than other types of positioning technologies. Because of this, piezoelectric motors have several advantages over traditional motion control devices.

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