| 摘要 |
PROBLEM TO BE SOLVED: To provide a current-controller capable of performing an electric conduction through a brush appropriately as necessary without overs and shorts for effectively prolonging the brush life.SOLUTION: A current-collector 16 of the present invention includes: a slip-ring 17 integrally disposed on an outer rotor 14 of a motor 6; and frist and second brushes 18A and 18B electrically connected to a battery 23 through first and second electric conduction paths 19A and 19B, respectively, and movable between a contact position and a separated position with regard to the slip-ring 17. A brush alternation control between a first electric conduction mode and a second electric conduction mode is performed. In the first conduction mode, the first conduction path 19A is electrified by means of the first brush 18 in a state when the first brush 18A is driven at the contact position, while in the second conduction mode, the second conduction path 19B is electrified by means of the second brush 18B in a state when the second brush 18B is driven at the contact position. |
