| 摘要 |
PURPOSE: A direct driving brushless motor for an elevator door system is provided to minutely sense the position of a rotator without an expensive component such as a resolver. CONSTITUTION: In a direct driving brushless motor for an elevator door system, a stator is fixed while being wound by a coil. The stator forms a plurality of poles and has a circumference region. A permanent magnet is arranged in the circumference region. A rotary shaft is rotated together with the rotor. A magnet rotor(130) comprises a permanent magnet The permanent magnet has as many poles as the rotor. At least two hall sensors(121a,121b,121c) are separated from the magnet rotor. A control print circuit board controls a current applied to the coil. The control print circuit board senses the rotation position of the rotary shaft. |
