ROTOR OF HIGH-SPEED ELECTRIC MACHINE (VERSIONS) Russian patent published in 2010 - IPC H02K1/27 H02K21/14 H02K1/28 

FIELD: electricity.

SUBSTANCE: invention is related to the field of electric engineering and electric machine building and may be used in design of synchronous high-speed motors and generators. According to this invention, rotor comprises shaft (1) with alternating pole magnetic system attached on it, which is arranged in the form of identical solid circular plates tightened to each other in axial direction. In plates there are windows arranged, which are intended for placement of permanent magnets (2). According to the first version of realisation, permanent magnets are magnetised in tangential direction, and according to the second version - in radial one. In each of circular plates there are magnetic and nonmagnetic zones. According to the first version, one of nonmagnetic zones represents ring (3) that embraces shaft, and other circular fragments (4) arranged along external diametre of plate, which limit space of windows from outside. According to the second version, nonmagnetic zones are arranged between end surfaces of neighboring windows and between their geometric extensions that achieve external diametre of plate surface. Difference (by 10-20%) in dimensions of circular fragments arcs and widths of windows for placement of permanent magnets (according to the first version), and also heights of end surfaces of windows and their separating partitions (according to the second version) makes it possible to increase mechanical strength of structure in corners of windows, where maximum mechanical tensions occur from action of centrifugal forces. Solid plates are made of material, which may vary its magnetic properties, for instance, from magnetic austenite steel, which after special thermal or mechanical processing acquires properties of nonmagnetic material.

EFFECT: simplified design and increased mechanical strength of rotor by selection of new structure of plates, where nonmagnetic zones are formed.

2 cl, 2 dwg