| 摘要 |
PURPOSE:To prevent an excessive joule loss from being generated at the electrical conduction end of armature coils, by stopping the electrical conduction to an only specified section of the electrical conduction end. CONSTITUTION:On an armature core 4, salient poles 4a-4d are formed, and on the respective salient poles 4a-4d, armature coils 5a-5d are fitted. On the central section of the core 4, a metallic cylinder 2 is fitted, and in the cylinder 2, the external ring of a ball bearing 3 is fitted. At one end of a rotary shaft 1, the central section of the bottom surface of a mild steel cup 13 press in the shape of a cup is fixed. Inside the cup 13, a ring-formed magnet rotor 6 is fixed. Conduction of the armature coils 5a-5d, is stopped for only a specified section of the end of the electrical conduction. |
