NUMERICAL METHODS FOR CALCULATING THE MECHANICAL BEHAVIOR OF ELECTROMAGNETIC DEVICES

Abstract

A method for calculating the displacement of a moving armature and additional masses in an electromagnetic device is presented. The transient magnetic field is calculated numerically, considering the velocity and the nonlinearity of iron. The resulting force drives a mechanical system described by the equation of motion, which is solved by a Runge‐Kutta‐algorithm If more than one part of the device is moving, the conservation of momentum is taken into account to determine the movement. Four methods to shorten the calculation time and keep or improve the accuracy in determination of displacement and velocity are investigated. One of these methods leads, in spite of a shortened calculation time, to better results.

Citation

Kahnert, A. (1994), "NUMERICAL METHODS FOR CALCULATING THE MECHANICAL BEHAVIOR OF ELECTROMAGNETIC DEVICES", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 13 No. 1, pp. 83-86. https://doi.org/10.1108/eb051846