Abstract: A rotor for an electric machine, the rotor including a rotor core having an outer portion and an inner portion located closer to the rotation axis of the rotor core than the outer portion. The outer portion is connected to the inner portion through a plurality of spokes, and the rotor core is adapted to be connected to a rotor shaft by a shrink fit. Each of the spokes includes at least one skew portion extending in a spoke angle relative to a radial direction of the rotor core, the spoke angle being greater than 30°.

Abstract: The object of the invention is a method and installation means for installing an electrical machine, particularly for installing a rotor within a stator. According to the invention, two or more spacer elements (32) are fitted on the outer circumference of the rotor (6), the distance between the outermost part of these spacer elements and the rotor's central axis of rotation (7) being smaller than the inner radius of the stator (2) and greater than the outer radius of the rotor (6), and the rotor is inserted into the stator in the direction (S) of its shaft.

Abstract: The object of the invention is a rotor for an electrical machine (2) formed from layered sheets (5, 22) essentially perpendicular to the rotor's axis of rotation. According to the invention, the rotor comprises at least one first sheet pack (4) that is located close to the central axis of the rotor's revolution and has cavities essentially equal in width to the rotor poles on the side of the rotor's circumference, and at least one second sheet pack (20) that is fitted to the cavity in the first sheet pack and essentially extends to the rotor's circumference, forming the outer surface of the rotor pole. A space (21) extending to the rotor's outer circumference has been arranged between the first and second sheet pack into which permanent magnets (26) intended for the magnetization of the motor are fittable.

Abstract: The object of the invention is a rotor for a permanent-magnet machine with an outer circumference curved towards the stator of the machine and permanent magnets fitted into openings arranged in the pole piece. According to the invention, the pole piece includes several parallel permanent magnets, leaving a neck of material at the edges of the pole piece outside the permanent magnets.

Abstract: The object of the invention is a method and installation means for installing an electrical machine, particularly for installing a rotor within a stator. According to the invention, two or more spacer elements (32) are fitted on the outer circumference of the rotor (6), the distance between the outermost part of these spacer elements and the rotor's central axis of rotation (7) being smaller than the inner radius of the stator (2) and greater than the outer radius of the rotor (6), and the rotor is inserted into the stator in the direction (S) of its shaft.

Abstract: The object of the invention is a rotor for an electrical machine (2) formed from layered sheets (5, 22) essentially perpendicular to the rotor's axis of rotation. According to the invention, the rotor comprises at least one first sheet pack (4) that is located close to the central axis of the rotor's revolution and has cavities essentially equal in width to the rotor poles on the side of the rotor's circumference, and at least one second sheet pack (20) that is fitted to the cavity in the first sheet pack and essentially extends to the rotor's circumference, forming the outer surface of the rotor pole. A space (21) extending to the rotor's outer circumference has been arranged between the first and second sheet pack into which permanent magnets (26) intended for the magnetisation of the motor are fittable.

Abstract: A permanent magnet element intended especially for electrotechnical devices and an electric machine, the element (1) comprising at least one permanent magnet piece (10). The permanent magnet element (1) also comprises a protective cover (11) that is arranged to partly surround the permanent magnet pieces (10) arranged in the element, and the permanent magnet element (1) also comprises one or more fastening elements (13; 21).

Abstract: A permanent magnet element intended especially for electrotechnical devices and an electric machine, the element (1) comprising at least one permanent magnet piece (10). The permanent magnet element (1) also comprises a protective cover (11) that is arranged to partly surround the permanent magnet pieces (10) arranged in the element, and the permanent magnet element (1) also comprises one or more fastening elements (13; 21).