| 摘要 |
PURPOSE:To remove the generation of a spark in the running of a movable portion by connecting a drive controller with a commutator function for supplying driving signals for temporally changing the state of the magnetic poles of the movable portion to a conductor pattern always in contact with a brush. CONSTITUTION:In order to supply a driving signal wherein a polarity temporally changes to the coils 5a of a movable portion 6, a temporally changing magnetic pole is generated in the movable portion 6. In result, a suction, force is generated between field opposing portions 4 and the movable portion 6 runs along a rail 2a. At this time, the driving signal with a polarity which temporally changes in accordance with the polarity which is changed over by the commutator is generated in a drive controller to be supplied to the coils 5a via a conductor pattern 8a and brushes 7a which are in a normal contact with each other. Thus, a spark which is generated between the brushes 7a and the conductor pattern 8a when the brushes 7a pass the edge of the conductor pattern 8a can be removed. |
