On-line compensation apparatus for feedback positions of encoder and method for operating the same

摘要

An on-line compensation apparatus for feedback positions of an encoder and method for operating the same are applied to a motor driven to rotate at a constant speed by a driver, thus compensating the errors of feedback positions of the encoder. First, a compensation quantity calculation unit is used to calculate the compensation quantity of feedback positions of the encoder. Afterward, a position interval judgment unit is used to determine the position interval of the compensation quantity. Finally, a compensation quantity modification unit is used to modify the compensation quantity by using different weightings. Therefore, the compensation quantity is modified by an iteration calculation to achieve that an error between the feedback position and an ideal position is in an acceptable region, thus increasing accuracy of the feedback position compensation of the encoder.