| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a required motor characteristics is not met because the area occupied by a hindrance factor cannot be reduced which obstructs formation of a copper pattern such as notch, solder round, and through hole for fixing a printed board, resulting in more decrease in size of a drive coil than motor's decrease in diameter ratio, related to, in a trend for a smaller motor, a permanent magnet type motor in which a conical drive coil is formed by a copper pattern on a printed board to provide a stator. SOLUTION: The hindrance factors 23, 24, 45 are arranged near the corner of the drive coils 14 and 15. The shape of the drive coils 14 and 15 is deformed by following the hindrance factors 23, 24, and 45. The occurrence torque and resistance value among the drive phases of the drive coils are uniformized. Thus, the radial distance which is effective for generating a torque of the drive coils 14 and 15 is made larger. COPYRIGHT: (C)2004,JPO |
