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Linear and Rotating Piezo Motors

Authored on: Aug 16, 2007

Technical Paper / Conference Paper

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Famous piezo motors, such as Traveling Wave Ultrasonic Motors, present several technical limitations: they are not useable for linear drive, they cannot be easily adapted to specific rotational needs, and the development of customized solutions is expensive. This paper discusses the proposed Ultrasonic Piezo Drive (UPD), aimed at overcoming these limitations. It is a shell-based stator using multilayered piezoceramics in d33 mode. Excited at only 1-10V, it produces an ultrasonic elliptical vibration that can direct drive any type of second body by friction. The versatility of the UPD is shown through direct-drive linear or rotating motors, aiming at micro-positioning applications.

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