Turning drive device
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United States of America Patent
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Sep 29, 2015
Grant Date -
May 29, 2014
app pub date -
Jan 30, 2014
filing date -
Aug 9, 2011
priority date (Note) -
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Abstract
A turning drive device is provided that converts power of an engine into electric power and turns a turning body using the converted electric power. The turning drive device includes an electrical energy storage unit that stores electrical energy, a turning motor that is driven by an electric power from the electrical energy storage unit and is configured to drive a turning body, an inverter that controls a drive operation of the turning motor, a controller that is connected to the inverter via a control signal line, and an emergency operation part that supplies a command to the inverter when an abnormality occurs in a control operation of the turning motor. The inverter blocks the control signal line based on a signal from the emergency operation part and controls the drive operation of the turning motor.
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