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Magnetic Transducers

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Electromechanical Systems in Microtechnology and Mechatronics

Part of the book series: Microtechnology and MEMS ((MEMS))

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Abstract

The magnetic transducers form the first large group of electromechanical transducers. Electromagnetic, electrodynamic and piezomagnetic transducers belong to the group of magnetic transducers [1, 2, 22]. In case of an electrodynamic transducer, a magnetic force – lorentz force – being proportional to coil current appears in the air gap between moving coil and fixed yoke. In contrast, in case of a magnetic transducer, a nonlinear magnetic force appears between armature and yoke. In order to achieve a linearization, an operating point adjustment by means of a constant magnetic field or a superimposed direct current is necessary. Also with the piezomagnetic transducer an operating point adjustment is achieved by a constant magnetic field or a direct current. Thus, an approximately linear small-signal behavior is achieved. Here, the connection between magnetic and mechanical field quantities is described by means of equations of state.

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Authors and Affiliations

  1. Faculty of Electrical and Computer Engineering, Dresden University of Technology, Helmholtzstraße 10, 01069, Dresden, Germany

    Professor Dr.-Ing habil Arno Lenk & Professor Dr.-Ing habil Günther Pfeifer

  2. Karl Mayer Textile Machinery, Bruehlstr. 25, 63179, Obertshausen, Germany

    Dr.-Ing Rüdiger G. Ballas

  3. Darmstadt University of Technology, Institute for Electromechanical Design, Merckstr. 25, 64283, Darmstadt, Germany

    Professor Dr.-Ing habil Roland Werthschützky

Authors
  1. Professor Dr.-Ing habil Arno Lenk
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  2. Dr.-Ing Rüdiger G. Ballas
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  3. Professor Dr.-Ing habil Roland Werthschützky
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  4. Professor Dr.-Ing habil Günther Pfeifer
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Lenk, A., Ballas, R.G., Werthschützky, R., Pfeifer, G. (2011). Magnetic Transducers. In: Electromechanical Systems in Microtechnology and Mechatronics. Microtechnology and MEMS. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-10806-8_8

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