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A magnetic and mechanical evaluation of a force outlet design in magnetostrictive actuators
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
1998 (English)Conference paper, Published paper (Refereed)
Abstract [en]

A crucial problem in the design of magnetostrictive actuators is to obtain the combined function of its force outlet regarding its mechanical power transmission and achieving a uniform magnetization of the active material. In this paper, a suggested solution to this problem is evaluated by means of mechanical and magnetic finite element calculations. The principle design comprises a magnetic pole consisting of two laminated soft magnetic pieces, with the laminates in each piece perpendicular to each other. Moreover, one of the pieces is wedge-like in order to create a feasible “bend-over” of the magnetic field lines into the active material and to create a stiff force outlet similar to a solid one. Some realizations of the concept are also discussed

Place, publisher, year, edition, pages
1998. 385-8 p.
Keyword [en]
eddy current losses;finite element analysis;force control;intelligent actuators;laminates;magnetic flux;magnetic multilayers;magnetostrictive devices;
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-72343OAI: oai:DiVA.org:kth-72343DiVA: diva2:487509
Note
magnetostrictive actuators;force outlet design;mechanical evaluation;magnetic evaluation;mechanical power transmission;uniform magnetization;active material;finite element calculations;magnetic pole;laminated soft magnetic pieces;wedge-like pieces;bend-over magnetic field lines;stiff force outlet;giant magnetostrictive alloy;parallel permeability;magnetic flux density;eddy current losses;Terfenol-D; NR 20140805Available from: 2012-01-31 Created: 2012-01-31 Last updated: 2012-01-31Bibliographically approved

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