Patent ID: 7081730
Filing Date: 2006-07-25
Classification: H02P

Abstract:
1. A motor controller system adapted for use with a motor having a drive input and a rotating output shaft wherein the output shaft rotates at a rate corresponding to the drive input, said motor controller system comprising: converting means for converting a selected motor output shaft rotation rate to a corresponding incremental amount of movement for a fixed time period; a rotary position sensor adapted to be coupled to the motor's output shaft, said rotary position sensor sensing a rotational position of the output shaft and generating a position signal indicative thereof; a plurality of signal conditioning units coupled to said rotary position sensor, each of said plurality of signal conditioning units being associated with a particular range of motor output shaft rotation rates, each of said plurality of signal conditioning units (i) monitoring said position signal, and (ii) generating a feedback signal indicative of said rotational position of the motor's output shaft; and an error correction processor, coupled to said converting means and said plurality of signal conditioning units and further adapted to be coupled to the motor's drive input, for (i) selecting, at completion of each said fixed time period, said feedback signal from one of said plurality of signal conditioning units for which said particular range of motor output shaft rotation rates associated therewith encompasses said selected motor output shaft rotation rate, and (ii) generating a motor drive signal based on a difference between said incremental amount of movement and said feedback signal from said one of said plurality of signal conditioning units, wherein the motor drive signal is applied to the motor's drive input.