Angular position sensor

摘要: An angular position sensor (1) suitable for use in combination with the rotor of an electric motor comprising both absolute and incremental encoders (3) where a first signal encoder produces period corresponding to revolution less than mechanical rotor, second output varies periodically over complete two signals provide sufficient information determine rotor. Typically, transitions combined state such information. Also, mask (6) at least one annular track (7) detectors arranged detect elements tracks, that area swept across each detector by radius is same as rotated about point centre track.