Patent ID: 8694189
Filing Date: 2014-04-08
Classification: B60L,Y02T

Abstract:
1. A vibration suppression system for an electrically driven vehicle having an electrically driven motor as a power source, comprising: a rotation speed detector configured to detect a motor rotation speed; a motor torque target calculation unit configured to calculate a motor torque target value in response to a driver request; a first torque target calculation unit configured to calculate a first torque target by feedforward (F/F) operation using a model transfer characteristic between a torque input and the motor rotation speed with respect to the motor torque target value; a second torque target calculation unit configured to calculate a second torque target by feedback (F/B) operation using the model transfer characteristic between the torque input and the motor rotation speed with respect to the motor rotation speed; a motor torque command setting mechanism configured to add the first torque target and the second torque target to obtain the motor torque command to the motor; a determination mechanism configured to determine whether or not the model transfer characteristic between the torque input and motor rotation speed matches an actual transfer characteristic; and a vibration suppression mechanism configured to set the motor torque target value as the motor torque command during at-he time period in which the transfer characteristic between the torque input and motor rotation speed is not determined to match the actual transfer characteristic, while stopping the F/F operation of the first torque target using the first torque target calculation unit and the F/B operation of the second torque target using the second torque target calculation unit.