| 摘要 |
The present invention relates to a method and an apparatus for controlling the drive system for mobile equipment such as a mobile construction and/or mining machine, in particular mining truck. The drive system comprises at least two electric traction motors for driving separate wheels or crawler chains of the mobile machine, and a control unit for controlling speed, power output and/or torque of said electric traction motors. The control unit comprises an operator's drive commander for choosing a desired machine speed and/or desired power out put. When the operator's drive commander is kept constant, the electric traction motors are controlled by a torque controller to provide uniform torque, wherein deviations in speeds of the electric traction motors are determined and the electric motor power of at least one of said electric traction motors is varied relative to the electric motor power of the other electric trac tion motor in response to a determined deviation in speed to keep the torques of the electric traction motors uniform. The power control balancing compensates for the torque differences previously encountered when the speeds of the traction motors differ at equal power supplied to the traction motors. '-00 |
