Patent ID: 8073583

Claim:
An apparatus for controlling energy feedback for an electric vehicle having an electric motor and a storage battery, comprising: a motor controller; an accelerator-pedal position sensor configured to sense a position of an accelerator-pedal, and transmit an accelerator-pedal position signal to the motor controller; a brake-pedal position sensor configured to sense a sensing position of a brake-pedal of the vehicle, and transmit a brake-pedal position signal to the motor controller; a vehicle speed sensor configured to sense a current speed of the vehicle, and transmit a current vehicle speed signal to the motor controller; the motor controller, configured to: obtain an accelerator-pedal travel value (Gain), a brake-pedal travel value (Brake_Deep), and a current vehicle speed value (V) based on the accelerator-pedal position signal, the brake-pedal position signal, and the current vehicle speed signal, if the brake-pedal travel value (Brake_Deep) is not equal to 0%, calculate a feedback torque (T) based on the current vehicle speed value (V) and the brake-pedal travel value (Brake_Deep), and control an output of the motor based on the calculated feedback torque (T); if the brake-pedal travel value (Brake_Deep) is equal to 0% and if the accelerator-pedal travel value (Gain) is less than or equal to a given feedback value, then calculate the feedback torque (T) based on the current vehicle speed value (V), and control an output of the motor based on the calculated feedback torque (T); and if the brake-pedal travel value (Brake_Deep) is equal to 0% and if the accelerator-pedal travel value (Gain) is not less than or equal to the given feedback value, then set the feedback torque (T) equal to 0; and an inverter connected between the motor and the battery configured to convert mechanical energy generated by the feedback torque (T) into electric energy, and charge the storage battery.