POLYPHASE ELECTRICAL MACHINE WITH PERMANENT MAGNETS

摘要

The invention relates to an electrical machine comprising a salient pole stator and a salient pole rotor which rotor is mounted outside the stator and is formed by a thrust ring and a magnetic system. The rotor magnetic system comprises the stacks of segmental plates with recesses for accommodating the stacks of pole plates which are, in essence in the form of a triangle and one of the vertexes of which is turned towards to the thrust ring, and tangentially magnetised magnetic units disposed between the stacks of the segmental and pole plates, wherein each stack of pole plates is axially tied by means of a fastener passing through an inner hole in the pole plates. The electric machine differs in that each pole plate is provided with a slot extending from the above-mentioned inner hole to the above-mentioned vertex and in that a shaped element is mounted in the area of said vertex in the axial direction of the rotor, is rigidly connected to the fastener via the above-mentioned slot by means of at least one tie rod in such a way that the shaped element adjoins to the inner end faces of the magnetic units.