| 摘要 |
PURPOSE:To enable to readily magnetize a sinusoidal wave at the pole by forming grooves perpendicular to the central hole on the end face of a cylinder which is formed of a magnetic material, and winding an exciting coil in the grooves. CONSTITUTION:Four grooves 17 perpendicular to a hole 19 are formed on the end face 16 of a cylinder 15 so as to wind an exciting coil by forming the hole 19 at the center of the end face 16 of the cylinder 15 formed of a magnetic material and forming 4-pole field magnet alternately having N- and S-main poles for driving. In this manner the opposed surfaces 16 are divided equally into four sections to form crest-shaped portions 15a, and the exciting coils are wound in the grooves 17. |
