| 摘要 |
<P>PROBLEM TO BE SOLVED: To suitably perform supplying of electric power while adapting to a rated voltage of an elevator and to rescue a passenger by quick switching to back-up operation in abnormality of a power source. <P>SOLUTION: Electric power supplied from a commercial power source 101 is accumulated in a battery 108, and when abnormality is generated on the commercial power source 101, the electric power of the battery 108 is adjusted to a predetermined voltage by a boosting chopper circuit 111 and is converted to a rectangular wave by an inverter device 113 to supply it to a drive system and a control system of the elevator through a switching unit 114. Thereby, supplying of electric power can be performed while adapted to the rated voltage of the elevator and the passenger can be rescued by quick switching to the back-up operation in abnormality of the power source. <P>COPYRIGHT: (C)2009,JPO&INPIT |
