Self-sensing Actuators Based on Ferromagnetic Shape Memory Alloys

Konferenz: ACTUATOR 2018 - 16th International Conference on New Actuators
25.06.2018 - 27.06.2018 in Bremen, Deutschland

Tagungsband: ACTUATOR 2018

Seiten: 4Sprache: EnglischTyp: PDF

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Ehle, F.; Neumeister, P.; Keitel, U.; Neubert, H. (Fraunhofer IKTS, Dresden, Germany)

Ferromagnetic shape memory alloys (FSMA) exhibit a strong magneto-mechanical coupling, which motivates their application in electro-mechanical actuators. The significant magnetic anisotropy causing the coupling can also be used for sensing. The application of both mechanism within one device form a so called self-sensing actuator. However, sensing in presence of an actuation magnetic field has not been investigated much in detail. The present study conveys the potential of different self-sensing concepts within FSMA actuators by means of simulation models, assuming typical properties and magnetic circuit topologies. Results are evaluated and the potential for practical assemblies of self-sensing FSMA actuators is discussed.