| 摘要 |
<P>PROBLEM TO BE SOLVED: To eliminate a bias between a charge current command and a discharge current command with respect to fluctuation of a user-side power supply. <P>SOLUTION: This elevator control device has a battery device connected between DC lines of a power conversion device which drives a motor for an elevator, via a charge/discharge circuit. It comprises charge/discharge voltage command output parts 20, 21 for outputting charge/discharge voltage command values to determine the start of charge/discharge, charge preceding control means 18, 23 for outputting a charge current command when DC voltage between the DC lines exceeds the charge voltage command value, discharge preceding control means 19, 25 for outputting the discharge current command when the DC voltage between the DC lines does not exceeds the discharge voltage command value, and bias setting parts 16, 17 for additionally setting bias voltage preset during a change of a voltage reference value for the DC voltage with a change of the user-side power supply for the voltage command output parts 20, 21 to generate the positive/negative charge current command and discharge current command into non-biased object waveforms. <P>COPYRIGHT: (C)2007,JPO&INPIT |
