Patent ID: 9236820
Filing Date: 2016-01-12
CPC Classification: B62D,H02P

Claim Text:
1. A motor control system, comprising: a motor having a rotor and a stator, the motor configured for generating an output torque based on a phase current applied to the motor, the output torque creating a torque ripple that is within a predefined range, the torque ripple is a percentage in difference between a maximum torque output and a minimum torque output compared to an average torque output by the motor over a specified period of time; a position sensor for monitoring the motor to determine a rotor position; a current sensor for monitoring the motor to determine the phase current; a control module in communication with the motor, the position sensor, and the current sensor, the control module including a lookup table that stores values of phase current commands applied to the motor, the phase current commands configured for generating the torque ripple within the predefined range by the motor, the phase current commands stored in the lookup table are based on a specific amount of current supplied to the motor at a specified rotor position of the motor to generate a required amount of torque, the specific amount of current supplied to the motor to generate the required amount of torque is represented by an adjusted current profile, the control module configured for: determining a specific phase current command from the lookup table based on the rotor position and the phase current, the phase current command indicating the phase current to be applied to the motor; and sending a control signal to the motor for generating the output torque, the control signal based on the specific phase current command.