| 摘要 |
<p>The stator (3) has a yoke (4) comprising a cylindrical wall (41) having a longitudinal axis (X). A trapezoidal shaped permanent magnet (40) is arranged inside the yoke. The magnet has a lateral edge (42) forming an angle with the longitudinal axis of the wall of the yoke, where the angle is less than 5 degrees. A fixation element i.e. slit crown (45), fixes the magnet against an inner surface of the cylindrical wall of the yoke. The fixation element is constituted of a retaining tab (47) that is formed by cutting and folding a metal sheet.</p> |
