| 摘要 |
PURPOSE:To simplify the magnetizing step by forming slots perpendicularly crossing at the center at a fine pitch to form frequency detecting poles of a fine pitch on the entire end face of a magnetizing device, thereby simultaneously magnetizing the main poles and the frequency detecting poles. CONSTITUTION:A magnetizing yoke 14' is formed with slots 17' perpendicularly crossing at the center on the end face 16' of a cylinder 15' made of a ferromagnetic material, exciting coils 18 of thick diameter are wound in the slots 17', many slots 18 perpendicularly crossing at the center at fine equal interval pitch are formed to form a frequency detecting pole 13 of fine pitch on the entire end face 16', and exciting coils for forming the frequency detecting pole 13 of the fine diameter is spirally wound in the slot 19. Since a magnetizing device for forming a main pole and a magnetizing device for detecting the frequency are integrated, the both poles can be simultaneously and readily magnetized. |
