Patent ID: 7863837
Filing Date: 2011-01-04
Classification: B60K,B60L,B60W,B60Y,Y02T

Abstract:
1. A drive system for an electrically driven dump truck comprising: a prime mover; an electronic governor for controlling the revolution speed and torque of the prime mover; an alternating-current generator driven by the prime mover; prime mover loads other than the alternating-current generator, driven by the prime mover; at least two electric motors for traveling, each of which is driven by the electric power supplied by the alternating-current generator; and at least two inverters, each of which is connected to the alternating-current generator, and each of which controls each of the electric motors, wherein the drive system comprises target revolution speed calculation means for calculating the target revolution speed corresponding to the operation amount of an accelerator pedal, and motor control means for controlling the inverters to control the electric motors in response to the operation amount of the accelerator pedal; the electronic governor is configured to control the fuel injection amount for the prime mover on the basis of the target revolution speed and is set such that when the target revolution speed is set at least at the maximum revolution speed, the control of the fuel injection amount becomes a droop control; and the motor control means includes: