| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a drive system of a power-driven dump truck for appropriately distributing horsepower between travelling and other than the travelling in response to a change in working environment. <P>SOLUTION: The system includes an engine 4; a generator 5; electrically-operated engines 12R, 12L for travelling driven by power applied from the generator 5; inverters 73R, 73L controlling the motors 12R, 12L; an engine load 18 other than the generator 5; a thermometer 20 measuring operational oil temperatures; an overall control device 3; and an inverter control device 7. The control device 3 calculates a correction coefficient Kp in response to a hydraulic oil temperature detected by the thermometer 20, subtracts driving horsepower g(Ne) of other engine loads 18 corrected by using the coefficient Kp from maximum output horsepower f(Ne) of the engine 4 then obtains maximum horsepower Mr usable by the motors 12R, 12L. The control device 7 obtains target torque TrR, TrL of the motors 12R, 12L on the basis of the maximum horsepower Mr to control the inverters 73R, 73L. <P>COPYRIGHT: (C)2008,JPO&INPIT |
