| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an elevator control device capable of utilizing an elevator for a long period of time even at emergency operation such as power failure. <P>SOLUTION: The elevator control device of the present invention comprises a rectifier 2 for generating a DC voltage from an AC power source 1 to a DC voltage part; an inverter 3 for converting the DC voltage at the DC voltage part to an AC voltage; an AC electric motor 4 driven by the AC voltage fed from the inverter 3; and a capacitor electricity accumulation device 6 connected to the DC voltage part and performing accumulation/discharge. The capacitor electricity storage device 6 is constituted by a plurality of electric double-layer capacitors capable of adopting the connection form of series or parallel form each other. When the AC power source 1 is power-failed, the plurality of electric double-layer capacitors adopts the connection form of the parallel connection. <P>COPYRIGHT: (C)2008,JPO&INPIT |
