Thursday, March 9, 2017
Shaft voltage is directly attributable to two different things: dissymmetry in the magnetic path, and generation of a static charge.
Internal to the machine, the construction of the magnetic circuit (laminations and frame) and the layout of the conductors (winding) contribute to a potential dissymmetry in the flux path. After all, most coils are hand-made - which leads to marginal, but noticeable differences.
External to the machine is the source waveform. If it is disto ...