Electrical machine
OwnerWolfgang Volkrodtinventor
Life of this patent
Estimating the term…
Abstract
An electrical machine is provided which consists of a stator made up of stacks of plates and a rotor mounted at the ends of the machine in bearing plates and rotatable in the stator. The stator plates, which are asymmetrically designed so that one part has an arcuate outline corresponding to a circular stator contour while the opposite part has a rectangular contour with an arcuate separating line extending as far as possible into the described outline when the plates are being stamped from strip material, are arranged in respective separate stacks situated on one another, multiples of 90.degree. apart, in order to form a self-supporting stator.
Claims7
An electrical machine comprising a stator having a cylindrical cavity extending therethrough;
- bearing means at opposite ends of said stator;
- a rotor in said cavity and mounted for rotation at opposite ends thereof in said bearing means;
- said stator comprising a plurality of stator plates having the same asymmetrical configuration and arranged in stacked relationship, each stator plate having a circular aperture therein of predetermined diameter, four secondary apertures arranged in a square configuration about said circular aperture, said secondary apertures being a predetermined distance from the perimeter of said circular aperture and the axes of said square configuration of said secondary apertures and of said circular aperture coinciding, a base edge spaced from one side of said circular aperture and from a pair of said secondary apertures, parallel side edges extending from opposite ends of said base edge, the distance of said side edges from each other being such that said side edges are a predetermined distance from the respective opposite sides of said circular aperture, and a top edge extending between said parallel side edges at the side of said circular aperture opposite said base edge, at least a major central portion of said top edge having a convex semicircular configuration concentric with and spaced a predetermined distance from the side of said circular aperture, said base edge having a central concave semicircular configuration complementary to said convex semicircular configuration of said top edge opposite said base edge and being spaced a greater distance from said one side of said circular aperture than said side and top edges;
- said stator plates of said stator being arranged in said stack with their circular apertures aligned to form said cylindrical cavity and with said stator plates arranged with their base edge sides offset from each other by 90.degree. and multiples thereof about the axis of said cylindrical cavity such that said secondary apertures of said stator plates are aligned to form four axial channels in said stator equally spaced about said cylindrical cavity;
- and means securing said bearing means and stator with said stator plates in said stacked relationship whereby the portions of said stator plates adjacent said base edge project radially about said stator and are spaced from each other to provide tangential cooling ribs.
Dependencies are inferred from the claim text.