| 摘要 |
A motor includes a base, a stator mounted on the base, a rotor having a bottom end face, a metal ring mounted to the bottom end face of the rotor, and a balancing magnetic ring. The stator creates alternating magnetic fields when energized. A ring magnet is securely mounted to the rotor. The alternating magnetic fields drive the ring magnet and the rotor to turn. The balancing magnetic ring is mounted on the base and faces the metal ring. The balancing magnetic ring continuously attracts the metal ring when the rotor turns, thereby maintaining rotational balance of the rotor.
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