ELECTRICAL MACHINE WITH A HIGH LEVEL OF EFFICIENCY

摘要

The invention relates to an electrical machine, in particular an electric motor having a stator (2) and also a rotor (1, 1 ') which is mounted such that it can rotate about a rotor axis (3) and has a rotor body (4), wherein permanent magnets (17, 17', 18, 18', 18", 24, 24', 25, 26, 27, 28, 29, 29', 30, 32, 33, 34, 35, 48, 49, 57) are arranged in holders (5a, 6a, 35a, 47a, 55a, 55'a) of the rotor body, said permanent magnets being composed at least partially of a mixed material, wherein the mixture is set in such a way that the mixed material has a remanence field strength Br of between 0.6 Tesla and 1 Tesla and a coercive field strength Hcj of between 1300 and 2500 KA/m. In addition, provision can be made for permanent magnets (17, 17', 18, 18', 18", 24, 24', 25, 26, 27, 28, 29, 29', 30, 32, 33, 34, 35, 48, 49, 57) or composite bodies (47) to be arranged in holders (5a, 6a, 35a, 47a, 55a, 55'a), and for said permanent magnets or composite bodies to have a contour, the cross-sectional area of said contour which is situated perpendicular to the longitudinal axis (7) being reduced within the respective holder (5a, 6a, 35a, 47a, 55a, 55'a) in the direction of the radially further outer end (5b, 6b) of said holder.