System and method of controlling motor for reducing vibration of electric vehicle
View Patent ↗A system and a method of controlling a motor for reducing vibration of an electric vehicle are provided that maximize an output torque of the motor by applying a vibration reduction torque gain based on a position value of the accelerator pedal. The system includes a driving motor as a power source and an accelerator pedal position sensor configured to detect a position value of an accelerator pedal. In addition, a controller is configured to calculate a virtual position value of the accelerator pedal limited to an increasing slope or a descending slope based on the position value of the accelerator pedal, and output a final torque of the driving motor by applying a vibration reduction torque gain based on the virtual position value of the accelerator pedal.
1. A system of controlling a motor for reducing vibration of an electric vehicle, comprising:
a driving motor configured to operate as a power source;
an accelerator pedal position sensor configured to detect a position value of an accelerator pedal; and
a controller configured to calculate a virtual position value of the accelerator pedal limited to an increasing slope or a descending slope based on the position value of the accelerator pedal, and output a final torque of the driving motor by applying a vibration reduction torque gain based on the virtual position value of the accelerator pedal,
wherein the controller is configured to calculate the virtual position value of the accelerator pedal using a high pass filter or a low pass filter.
2. The system of claim 1 , wherein the controller is configured to output the final torque based on a maximum output torque of the driving motor and a vibration reduction torque to which applied the vibration reduction torque gain.
3. The system of claim 1 , wherein the controller is configured to set the vibration reduction torque gain to a maximum value when the position value of the accelerator pedal is about 0%.
4. The system of claim 1 , wherein the controller is configured to set the vibration reduction torque gain to a minimum value when the position value of the accelerator pedal is about 100%.
5. A method of controlling a motor for reducing vibration of an electric vehicle, comprising:
detecting, by a controller, a position value of an accelerator pedal;
calculating, by the controller, a virtual position value of the accelerator pedal limited to an increasing slope or a descending slope based on the position value of the accelerator pedal;
applying, by the controller, a vibration reduction torque gain based on the virtual position value of the accelerator pedal; and
outputting, by the controller, a final torque of a driving motor,
wherein the virtual position value of the accelerator pedal is calculated using a high pass filter or a low pass filter.
6. The method of claim 5 , wherein the final torque of the driving motor is calculated based on a maximum output torque of the driving motor and a vibration reduction torque to which applied the vibration reduction torque gain.
7. The method of claim 5 , wherein the vibration reduction torque gain is set to a maximum value when the position value of the accelerator pedal is about 0%.
8. The method of claim 5 , wherein the vibration reduction torque gain is set to a minimum value when the position value of the accelerator pedal is about 100%.
9. A non-transitory computer readable medium containing program instructions executed by a controller, the computer readable medium comprising:
program instructions that control a driving motor to operate as a power source;
program instructions that control an accelerator pedal position sensor to detect a position value of an accelerator pedal; and
program instructions that calculate a virtual position value of the accelerator pedal limited to an increasing slope or a descending slope based on the position value of the accelerator pedal, and output a final torque of the driving motor by applying a vibration reduction torque gain based on the virtual position value of the accelerator pedal,
wherein the virtual position value of the accelerator pedal is calculated using a high pass filter or a low pass filter.
10. The non-transitory computer readable medium of claim 9 , wherein the final torque of the driving motor is calculated based on a maximum output torque of the driving motor and a vibration reduction torque to which applied the vibration reduction torque gain.
11. The non-transitory computer readable medium of claim 9 , wherein the vibration reduction torque gain is set to a maximum value when the position value of the accelerator pedal is about 0%.
12. The non-transitory computer readable medium of claim 9 , wherein the vibration reduction torque gain is set to a minimum value when the position value of the accelerator pedal is about 100%.