SYSTEM FOR REDUCING TORQUE RIPPLE IN AN ELECTRIC MOTOR

摘要

A motor control system is provided. The motor control system includes a motor, a position sensor, a current sensor, and a control module. The motor has a rotor and a stator. The motor generates an output torque based on a phase current applied to the motor. The output torque generated by the motor creates a torque ripple that is within a predefined range. The position sensor monitors the motor to determine a rotor position. The current sensor monitors the motor to determine the phase current. The control module is in communication with the motor, the position sensor, and the current sensor. The control module includes a lookup table that stores values of phase current commands. The control module determines a phase current command from the lookup table based on the rotor position and the phase current.

主权项

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; 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 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; andsending a control signal to the motor for generating the output torque, the control signal based on the specific phase current command