| 摘要 |
A switched reluctance motor includes a rotor (14) mounted for rotation about an axis (18), and having a plurality of rotor poles (22, 26, 30, 34) and a stator (38) surrounding the rotor (14) and including first, second and third stator phases. The motor also includes energizing means for sequentially energizing the stator phases with an energy source to cause rotation of the rotor (14), based on rotor position information, the energizing means causing one phase to be energized and then deenergized to a near zero current level prior to a point where the rotor pole breaks away from the stator pole. The motor further includes current sensing means for sensing the current in each of said phases, first means using the second current to determine rotor position at low motor speeds, and second means using the sensed current to determine rotor position at high motor speeds. <IMAGE> |
