| 摘要 |
PROBLEM TO BE SOLVED: To achieve more simplification, and at the same time to reach the state of the equilibrium of rotor rotation for stabilizing in machining manufacture by forming the annular permanent magnet of a rotor while the annular permanent magnet does not touch an annular body while they attract each other correspondingly. SOLUTION: A coil is wound between magnetic pole pieces 1 and 21 for forming a stator 2. A shaft taper hole 22 is punched in the stator 2 for pivoting with a rotary shaft 31 of a rotor 3 by the shaft taper hole 22. Also, an annular permanent magnet 32 is provided in the rotor 3 itself. When formation and assembly are made to a brushless DC motor, the rotor 3 is connected to the stator 2, and the permanent magnet 32 of the rotor 3 is associated with an annular body 14 of the magnetic pole piece 1, thus forming the permanent magnet 32 and the annular body 14 while they mutually correspond for attracting without any contact, stabilizing the rotation of the rotor 3, and preventing problems such as friction sound. |
