| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-cost stepping motor of high resolution, low rotational distortion, and low vibrations. SOLUTION: Stator magnet poles made up of 6k pieces magnetic materials are arranged in its radial direction, wound with 3k phase windings. Two or more pieces of teeth are provided at the end of the magnet poles. An HB stepping motor is structured with two pieces of rotors having Nr pieces of rotor pole teeth in equal pitch on the circumference of the rotors displaced to each other by 1/2 pitch clamping a permanent magnet magnetized in the axial direction. A permanent magnet motor is structured with a cylindrical magnet that is magnetized into two or more pairs Nr of N and S poles alternately in equal pitch in its circumferential direction. This motor is a dynamo electric machine that includes the stepping motor in which the relation of Nr = (k/2) (12n±5)[where n is an integer of 1 or larger, and k is an even number of 2 or larger] is satisfied. COPYRIGHT: (C)2004,JPO
|
