Patent ID: 7054783
Filing Date: 2006-05-30
Classification: B66B,G01P,H02K,H02P

Abstract:
1. A rotary detector comprising: a rotary detector unit which detects rotary motion of a rotor; and a rotary calculator unit comprising a rotation angle detector, which detects a rotation angle of said rotor, and an angle speed detector which detects an angle speed of said rotor, based on an output of said rotary detector unit; said rotary calculator unit comprising: a trigonometrical calculator which calculates a sine value or a cosine value of the rotation angle detected by said rotary detector; a gain adjuster which multiplies the sine value or the cosine value, calculated by said trigonometrical calculator, by a predetermined gain; a multiplier which multiplies an output of said gain adjuster by an output of said angle speed detector; and a subtracter which subtracts an output of said multiplier from the output of said angle speed detector.