Abstract
Frequency characteristics of magnetic flux in magnetic actuators are analyzed through a one dimensional model. The subject is formulated as the flux penetration into the iron core from the pole face for a given magnetomotive force. First, the two-dimensional distribution of the magnetic intensity is obtained. The numerical results check the effect of the distribution near the pole faces and the magnetic-flux concentration near the surface of iron core. The results also show the effectiveness of a simple model without the pole-face effect, presented before, in higher frequencies and/or longer iron cores. Next, the simple model is used to examine the effect of magnetic saturation. The numerical result shows the degeneration of the magnetic flux higher than that in the case without saturation. This coincides with the difference between an experiment and a model, and suggests that the modeling should consider the effects of magnetic-flux saturation.
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