Shovel with enhanced engine speed management using power storage device
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United States of America Patent
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Jul 11, 2017
Issued Date -
N/A
app pub date -
Aug 4, 2016
filing date -
Mar 31, 2014
priority date (Note) -
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Abstract
A shovel according to an embodiment of the present invention includes an upper swivel body, an engine, a motor generator which can assist the engine, a capacitor, a swiveling electric motor which swivels the upper swivel body, a DC bus which is connected to the motor generator, the capacitor, and the swiveling electric motor, and a controller which controls charging and discharging of the capacitor. In a case where a swiveling operation is performed, the controller drives the swiveling electric motor by discharging power discharged by the capacitor, and thereafter, drives the swiveling electric motor by power generated by the motor generator.
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