公开(公告)号：US20190160965A1

公开(公告)日：2019-05-30

申请号：US15827272

申请日：2017-11-30

Applicant: Caterpillar Inc.

Inventor： Brian D. Kuras ,  Sangameshwar Sonth ,  Arkit Sharma

IPC: B60L15/20 ,  E02F9/20

Abstract: A control system for controlling operation of a drive motor includes an input device for providing a command signal that is indicative of a desired speed and direction of rotation of the drive motor. A sensor is associated with the drive motor and adapted to provide a sensor signal indicative of current rotational speed of the drive motor. A controller receives the command signal, and determine whether the command signal is indicative of a desired zero speed to be associated with the drive motor. The controller also receives the sensor signal, and determine whether the current rotational speed of the drive motor is within a pre-defined range of difference from the desired zero speed. The controller then generates a de-rated torque command signal having a reduced gain factor, and reduce the current rotational speed of the drive motor based on the de-rated torque command signal.