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Proceedings Paper

New linear motor with a hybrid actuator
Author(s): Bernd Clephas; Hartmut Janocha
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Paper Abstract

In this paper we present a linear motor according to the inch- worm-principle as an application for a hybrid actuator. A hybrid actuator consists of magnetostrictive and piezoelectric transducers oscillating in their electrical resonance. The reactive energy is exchanged between the different transducer types which have to be supplied externally just to compensate for the energy transferred into mechanical work and inner losses. So a higher efficiency compared to applications with new actuators realized up to now can be achieved. The motor consists of a fixed magnetostrictive rod for the feed-forward and two piezo-stacks for the clamping. Research revealed remarkable influence of the mechanical load and the non- linearities and hysteresis of the transducers on their electrical behavior. This led to a new switching drive allowing a variable operating frequency and a miniaturized design without magnetic bias. Implementing a model of the electro-mechanical behavior of the transducers, precision positioning under the step-width can be performed just by evaluating the applied voltage and current. Furthermore, information about the applied mechanical load can be achieved (smart actuator).

Paper Details

Date Published: 6 June 1997
PDF: 10 pages
Proc. SPIE 3041, Smart Structures and Materials 1997: Smart Structures and Integrated Systems, (6 June 1997); doi: 10.1117/12.275656
Show Author Affiliations
Bernd Clephas, Univ. des Saarlandes (Germany)
Hartmut Janocha, Univ. des Saarlandes (Germany)

Published in SPIE Proceedings Vol. 3041:
Smart Structures and Materials 1997: Smart Structures and Integrated Systems
Mark E. Regelbrugge, Editor(s)

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