| 摘要 |
The two polar parts (9 and 10) which extend respectively above an underneath the cylindrical permanent magnet (7) forming the motor part of the rotor, are each provided with a generally circular opening but which is profiled and limited by three radial sectors (17) extending towards the center in the plane of the polar parts. Under the effect of alternated pulses circulating in the coil, the polar pans (9 and 10) are energized alternatively in North pole and South pole. By a particular arrangement of the sectors (17) and cutoffs (16) separating them, the balancing position of the rotor between the pulses is shifted with respect to the position towards which it tends when the polar parts are energized. |
