Abstract: A single-phase outer-rotor motor and a stator thereof are provided. The stator includes a stator core having a yoke and a number of teeth. Each tooth includes a tooth body and a toot tip. A winding slot is formed between each two adjacent tooth bodies. A slot opening is formed between each two adjacent tooth tips. The tooth tip protrudes beyond the tooth body. Inner surfaces of at least part of the tooth tips facing the stator are formed with cutting grooves such that a portion of the tooth tip outside the cutting groove is capable of being tilted outwardly to enlarge the slot opening and deformed inwardly to narrow the slot opening.

Abstract: A single-phase outer-rotor motor includes a stator and a rotor. The stator includes a stator core with windings wound thereon. The stator core includes a yoke and multiple teeth each including a tooth body and a tooth tip. The rotor includes a rotor yoke and a permanent magnet forming a plurality of magnetic poles facing the tooth tips of the stator core. The magnetic poles and the tooth tips define a gap there between. When the motor is de-energized, the rotor is capable of being positioned at an initial position by a leakage magnetic field generated by the permanent magnet acting with the tooth tips of the stator core.

Abstract: A single-phase brushless motor includes a stator, a rotor disposed within the stator, and sensors disposed around an outer periphery of the rotor. The stator includes a stator core made of a magnetic-conductive material, and a stator winding wound around the stator core. The rotor includes a rotary shaft and a pair of permanent magnetic poles. The stator core includes a pair of stator poles forming a receiving hole there between, and the rotor is disposed in the receiving hole. The inner circumferential surface of the receiving hole is located on a cylindrical surface which is coaxial with the rotary shaft and two locating slots which are symmetrical with respect to a center of the receiving hole are defined in the inner circumferential surface of the receiving hole, which can improve the distribution of magnetic flux, effectively reduce cogging torque, and increase operation efficiency.