| 简介 |
The invention relates to a dynamoelectric machine (6), comprising a multi-pole rotor (5), which has at least one rare-earth-containing permanent magnet (1) of the type Nd2-Fe14-B per pole (16), wherein a laminated stator (8) having a winding system (9) arranged in axially extending grooves electromagnetically interacts with the poles (16) of the rotor (5) across an air gap (10) and thus causes a rotational motion (RB) about an axis of rotation (RA), wherein the at least one permanent magnet (1) has at least four regions of different magnetic properties in a rotational motion direction (RB) of the rotor (5), which are arranged symmetrically to a pole center (11) of the magnetic pole (16) formed by the permanent magnet (1), wherein the surface of the permanent magnet (1) is shaped in such a way that a sinusoidal air gap field arises, in that the pole center (11) has a radially smaller air gap (10) than the pole edges (12). |
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