Description
Abstract: The orientation of a magnetic field can be detected by magneto resistive angle sensors. These sensors are used in many sensing applications in which the angle of a rotating system needs to be measured. Sensing applications in the automotive area include rotary switches or electrically commutated motors. Magneto resistive sensors consist of two orthogonal Wheatstone bridges which deliver a sine and a cosine signal. Due to different disturbances including offsets, amplitude deviation, orthogonality effects and harmonic distortion, these sensors consist of non-ideal sine and cosine waves. To guarantee high angle accuracy compensation of these effects is required. This master's thesis presents an additional algorithm to compensate for the influences of the harmonic distortion. In order to attain a higher angle accuracy. The proposed new compensation method is based on a DFT to identify and correct harmonic distortion.