| 摘要 |
<p>A turning drive device includes a turning motor (21) that is driven by an electric power from an electrical energy storage system (120) and is configured to drive a turning body (3), an inverter (20) that controls a drive operation of the turning motor, a controller (30) that is connected to the inverter via a control signal line, and an emergency operation part that supplies a command to the inverter (20) when an abnormality occurs in a control operation of the turning motor. The inverter (20) blocks the control signal line based on a signal from the emergency operation part and controls the drive operation of the turning motor (21).</p> |
