2D model of an electro-mechanical relay.

[[Category:GetDP]]
[[Category:Electromagnetism]]
[[Category:Mechanics]]

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Quick start
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Open `relay.pro' with Gmsh.

Additional info
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See http://onelab.info/wiki/Electromechanical_Relay

The electro-mechanical actuator comprises a yoke, two permanent magnets, two
coils and a mover.  The yoke and the mover are made of iron.  Eddy currents in
the magnets and in the laminated yoke and mover are neglected.  The permanent
magnets constitute a magnetic lock that keeps the mover either in the upper or
lower position tending to diminish the residual airgap.  The mover is moved down
or up by applying a voltage pulse to one of the coils.  The commutation is
facilitated by two springs.

Used in:

  R. V. Sabariego, J. Gyselinck, C. Geuzaine, P. Dular and W. Legros,
  "Application of the fast multipole method to the 2D finite element-boundary
  element analysis of electromechanical devices", COMPEL: The International
  Journal for Computation and Mathematics in Electrical and Electronic
  Engineering, 22(3):659-673, 2003.  http://orbi.ulg.ac.be/handle/2268/22765

  R. V. Sabariego, "The fast multipole method for electromagnetic field
  computation in numerical and physical hybrid systems", Ph.D. thesis,
  University of Li\`ege, 2004.  http://hdl.handle.net/2268/2374

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