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Numerical analysis of the coupled circuit and cooling holes for an electromagnetic shaker

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2 Author(s)
Ming-Tsan Peng ; Dept. of Eng., Univ. of Cambridge, UK ; Flack, T.J.

This paper presents a time-stepping shaker modeling scheme. The new method improves the accuracy of analysis of armature-position-dependent inductances and force factors, analysis of axial variation of current density in copper plates (short-circuited turns), and analysis of cooling holes in the magnetic circuit. Linear movement modeling allows armature position to be precisely included in the shaker analysis. A more accurate calculation of eddy currents in the coupled circuit is in particular crucial for the shaker analysis in a mid-or high-frequency operation range. Large currents in a shaker, including eddy currents, incur large Joule losses, which in turn require the use of a cooling system to keep temperature at bay. Sizable cooling holes have influence on the saturation state of iron poles, and hence have to be properly taken into account.

Published in:

Magnetics, IEEE Transactions on  (Volume:41 ,  Issue: 1 )

Date of Publication:

Jan. 2005

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