A Modular, Energy Efficient Actuator Based on Magnetic Shape Memory Alloys
L. Riccardi1, T. Schiepp2, B. Holz1, M. Maier2, H. Janocha1, M. Laufenberg2
1Universität des Saarlandes, Saarbrücken, Germany,
2ETO MAGNETIC GmbH, Stockach, Germany
Magnetic shape memory (MSM) alloys react to magnetic excitation with a deformation up to 6%, according to recent publications also up to 12%, and are a promising candidate for applications such as positioning, robotics and valve technology. In this work we describe, characterize and test a mechatronic system based on MSM alloys which entails a push-push actuating unit. The overall actuation system consists of a series of MAGNETOSHAPE® MSM modules that can be activated independently, and that can be composed and connected in different ways depending on the application needs. The actuated displacement is measured indirectly by a Hall sensor which is integrated in the actuator design. Each module is activated by a current source which is controlled by an algorithm running on a micro-controller. This algorithm is able to guarantee fast rise times and precise tracking of constant position references; moreover, it is able to offer a strong reduction of the power losses by a strategy which exploits advantageous properties of the hysteresis of the MSM alloys.
ACTUATOR 2014 Manuscript A3.6
Publication date: 08/04/2015
Manuscript A3.6 published in Conference Proceedings ACTUATOR 2014
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