Abstract:The shrinking contact resistance is due to the current shrinking near the so called "a-spot" contact area between conductors. In the numerical simulation of armature and rails, e.g., in the finite element simulation, such "a-spot" model can not be dealt with, since the gaps between conductors are too narrow to be meshed. It is suggested in this paper that a circular truncated cone can be employed to simulate the "a-spot". The truncated cones with suitable dimensions is able to enlarge the gaps wide enough to b… Show more
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