MODULE AND METHOD FOR ERROR CORRECTION BETWEEN OUTPUT SIGNALS OF MR SENSOR FOR DETECTING POSITION OF ROTOR OF ELECTRIC MOTOR

摘要

Disclosed are a module and a method for error correction between output signals of a magnetoresistive (MR) sensor for detecting position of a rotor of an electric motor. According to the present invention, a module for error correction between output signals of an MR sensor comprises: an AD conversion unit converts analog sine wave signals and cosine wave signals, output by the MR sensor, into digital sine wave output signals and cosine wave output signals; a time count detection unit detecting a maximum value and a minimum value update timer count value with respect to each of the digital sine wave output signals and the digital cosine wave output signals; a signal normalization process unit correcting an amplitude error and a direct current offset value with respect to each of the digital sine wave output signals and the digital cosine wave output signals; and a phase error correction unit correcting a phase error with respect to each of the digital sine wave output signals and the digital cosine wave output signals whose amplitude error and direct offset value have been corrected and outputting the corrected signals, wherein the direct current offset error, the amplitude error and the phase error of the output signals output by the MR sensor can be corrected and output.;COPYRIGHT KIPO 2020