| 摘要 |
PURPOSE:To obtain a thin-type face opposed type three-phase driving DC micromotor having a high output by specifying the combination of the number of poles of a magnet and the number of poles of a coil. CONSTITUTION:A rotor magnet 11 has eight magnetic poles 1S and 1N, in which N poles and S poles are alternately magnetized equally in the circumferential direction. Nine spiral type coil poles 4a-4i are arranged approximately uniformly along the circumferential direction in one plane shape in a flat coil 19 for three phase driving. When the relationship of the number of poles of the rotor magnet 11 of 2P (P represents an integer of four or more) and the number of poles of the spiral type unit coil of 3m ((m) represents an integer of three or more) is shown in 2P=2X(3k+1) and 3m=3X(2k+1) or 2P=2X(3k+2) and 3m=3X(2k+2) ((k) represents an integer of one or more), a three-phase driving DC motor having higher torque can be realized in the same size as a conventional system. When a motor having the same torque as the conventional system is manufactured, a small-sized thin type three-phase driving DC motor can be realized. |
