| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrically-driven work machine capable of transferring power between an accumulator and an electric power system or a load by utilizing an inverter provided in the electrically-driven work machine. <P>SOLUTION: When electric power is transferred between an accumulator BT and an electric power system PW or a load, connection of the accumulator BT to an inverter INV is cut off by an on-off switch S0, one phase of the AC side of an inverter INV is connected to a distribution line LC1 via a DC side inductor Ldc and the remaining two phases are connected to the electric power system PW or a load via an AC side inductor Lac by switching relays RY1 to RY3. When a motor Ma is driven by the accumulator BT, a positive side or negative side of the inverter is connected to the accumulator BT by the on-off switch S0 and the AC sides of the inverter INV are connected to first to third distribution lines LA1 to LA3 of the motor Ma by the switching means RY1 to RY3. <P>COPYRIGHT: (C)2013,JPO&INPIT |
