| 摘要 |
<P>PROBLEM TO BE SOLVED: To save electric power through effective utilization of the regenerated energy by previously accumulating the electric power generated during the regenerative operation, i.e. regenerated energy. <P>SOLUTION: A control device of an elevator is equipped with an electricity accumulator device 30, a voltage sensor 31 to sense the voltage value between DC bus bars, a charge/discharge control device 32 having a preset charging level and discharging level, emitting the first control signal when the voltage value sensed by the sensor 31 exceeds the charging level and emitting the second control signal when lowers below the discharging level, a DC/DC converter 33 to perform the charging operation of the accumulator device 30 on the basis of the first control signal emitted from the charge/discharge control device 32 and conduct the discharging operation of the accumulator device 30 on the basis of the second control signal. Thereby the power generated during the regenerative operation, i.e. regenerated energy, is accumulated in the accumulator device 30, and during the power running, the regenerated energy accumulated in the accumulator device 30 is discharged so as to establish saving the electric power. <P>COPYRIGHT: (C)2007,JPO&INPIT |
