Title :
Problem-oriented adaptive mesh-generation for accurate finite-element calculation
Author :
Tärnhuvud, T. ; Reichert, K. ; Skoczylas, J.
Author_Institution :
Dept. of Electr. Machines, Swiss Federal Inst. of Technol., Zurich, Switzerland
fDate :
3/1/1990 12:00:00 AM
Abstract :
Various sources of error in the finite-element method are examined. It is shown that the approximation of the vector potential, the discretization of the mesh, and the boundary discontinuity of H t can have a great influence on the accuracy of different quantities. Local and integral quantities on the derivative of the potential, such as forces and torques, are especially affected. To reduce these errors higher-order elements or adaptive mesh refinement processes can be used. A method is developed which uses a local adaptive refinement technique in the important region
Keywords :
DC machines; electromagnetic field theory; error analysis; finite element analysis; machine theory; magnetic fields; numerical methods; adaptive mesh refinement processes; boundary discontinuity; error; finite-element method; forces; integral quantities; local quantities; magnetic fields; mesh discretisation; permanent magnet DC machine; problem oriented adaptive mesh generation; torques; vector potential approximation; Computer errors; Electromagnetic fields; Finite element methods; Integral equations; Magnetic flux; Maxwell equations; Saturation magnetization; Shape; Torque; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on
