AXIAL ELECTROMAGNETIC BEARING

摘要

An axial electromagnetic bearing for supporting the end of a shaft rotating at high speed of the type comprising an armature in the form of a disc attached to the shaft and a fixed annular armature disposed facing the disc armature a short distance from the former so as to define a small axial air gap therebetween, the said fixed armature comprising excitation windings and a ferromagnetic core, the bearing being characterised in that radial grooves are provided in the peripheral portion of the disc and situated facing the annular fixed armature. The arrangement causes a reduction in the effect of Eddy currents without detracting from the mechanical strength of the bearing.