| 摘要 |
<P>PROBLEM TO BE SOLVED: To effectively take measures against harmonics at low cost, in a crane device configured to perform cargo handling of a container with power supplied through a power line extended along a lane. <P>SOLUTION: Three-phase transformers are provided for each power line. One three-phase transformer 71A of a pair of two three-phase transformers outputs first three-phase AC power formed of a voltage phase of the same phase as power source power as operation power, and the other three-phase transformer 71B outputs second three-phase AC power having a voltage phase shifted by π/6 relative to the power source power as operation power. A power storage device 4 of a crane device 10 stores DC power supplied from a three-phase full-wave rectifier 1 to a common bus conductor B, and supplies the stored power to the common bus conductor B when the DC power is reduced. <P>COPYRIGHT: (C)2013,JPO&INPIT |
