ANTI-LOSS-OF-ASSISTANCE FOR ELECTRIC MOTOR

• Main Authors: DU XINYU, TANG YATUNG, LIN WENIAO
• Format: Patent
• Language: Chinese; English
• Published: 21.06.2019
• Subjects: LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; MOTOR VEHICLES; PERFORMING OPERATIONS; TRAILERS; TRANSPORTING

A method of operating an electric power steering system installed on a vehicle. The electric power steering system includes a controller that receives a desired assist torque value and supplies a pulse-width modulation duty cycle to an electric motor. The method includes the step of controlling the electric motor to achieve a nominal value of power steering assist torque when the electrical poweravailable to the motor is sufficient to achieve the nominal value of power steering assist torque. The method further includes the step of controlling the electric motor to achieve a reduced value ofpower steering assist torque less than the nominal value when the electrical power available to the motor is not sufficient to achieve the nominal value of power steering assist torque. 一种操作安装在车辆上的电动助力转向系统的方法。该电动助力转向系统包括控制器，该控制器接收期望辅助扭矩值并向电动机提供脉冲宽度调制占空比。该方法包括以下步骤：在电机可用的电功率足以达到助力转向辅助扭矩的标称值时，控制电动机以实现助力转向辅助扭矩的标称值。该方法还包括以下步骤：在电机可用的电功率不足以达到助力转向辅助扭矩的标称值时，控制电动机以实现小于标称值的减小的助力转向辅助扭矩值。