Motion controller for piezoelectric unit PiezoMotor

Piezo LEGS® - Electronics
As the Piezo LEGS® motor is a non-resonant motor, the drive electronics can be made very simple and reliable. There is no need to keep track of the temperature or other environmental factors normally associated with electronics for resonant piezo motors, nor is there a need to tune the motor for the surrounding mechanical structure, different cable lengths etc.

To drive the Piezo LEGS® motor you need four phases plus ground. To create motion in one drive leg of the motor element you need two phases, one for each side of the electrically separated halves of the leg. The walking drive principle of the motor requires two pairs of legs that operate independently, adding two drive phases.

The same curve form is used for all phases and normally with a drive voltage signal from 0 to + 48 V. For each drive leg the applied signals are normally phase shifted 90° between the two independent sides of one drive leg and normally 180° between the two pairs of legs (see figure to the left below).

It is our experience that most of our customers want to integrate the drive electronics into their own PCB boards etc. and we encourage this by having several design proposals available for different applications and demands. Please contact us if you need further information in this respect.

We also offer our own PDA 3.1 Driver. This is a low cost driver with a simple +/- 10 V analogue interface that allows you hook up the driver to any standard DC or servo motor controller.

There is also other commercially available drivers and controllers from different manufacturers that have been developed for the Piezo LEGS® motors and we would be glad to give you assistance.

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