| 摘要 |
PURPOSE:To prevent the generation of an excessive Joule loss, by providing the title motor with a means, stopping the conduction of the motor during the predetermined period of time in the final period of conduction and restraining the stopping effect only upon starting the motor. CONSTITUTION:Armature coils 5a-5d are wound around respective salient poles 4a-4d of an armature core 4, made by laminating silicon steel sheets. A cavity is formed at the central part of the magnetic core 4 and a metal cylinder 2 is fitted thereinto while the magnetic core 4 is fixed to a main body by the metal cylinder 2 whereby a fixed armature is constituted. A ball bearing 3 is fitted into the cylinder 2 and a rotating shaft 1 is supported. An annular magnet rotor 6 is fixed to the inside of the cup 13 of the rotating shaft 1 and N-S magnetic poles 6a- are arranged and rotated together with the rotating shaft 1. When the armature coils 5a- are conducted reciprocally at every rotation of the magnet rotor 6 by an electric angle of 180 deg., an output torque is generated to rotate the motor as a Single-phase motor. Hall element 10 opposes to the magnet rotor 6. |
