Verifi cation of the magnetic force in a fi nite length magnet

概要

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The force which acts between two magnets is diff erent for the infi nite magnet set of poles. In the case of the fi nite length magnet there are four forces (F1, F2, F3, F4), because there are four pole facesin the two magnet (A,B), i.e. (1) Force F1 which works in front of magnet A and in the front of magnet B, (2) Force F2=F3 which aff ects front (rear face) of magnet A and rear face ( the front ) of magnet B,(3) Force F4 which works in rear face of magnet A and in the rear face of magnet B. The force which acts between the magnets is the sum of these forces (F0=F1+F2+F3+F4). In this study, the relationship, for the same magnetic pole, between distance between magnets and force was examined in order to verify this sum of forces relationship. We compared measured values to calculated values. Themeasured F0 characteristic tended to be similar to the F(∝ 1/r02 , r0 is the distance between magnetic centrals ) characteristic. The diff erence between F and F0 is a way of the defi nition of the distance.
2011-03-31