Patent ID: 6958600

Claim:
A magnetic absolute angular position sensor for valves controlled by electric part-turn actuators, which is formed by an essentially cylindrical case 1 , closed by a cover 3 , in which a support disk ( 2 ) is located, containing a magnet ( 8 ) and a circuit board ( 7 ) in front of the latter, characterized in that a rotation α of the valve shaft ( 10 ) induces a change in the direction of the magnetic flux lines generated by the magnet ( 8 ), which is arranged to be integral with the valve shaft ( 10 ) through the support disk ( 2 ), and generates two electric signals X and Y in the circuit board ( 7 ), which are offset at an angle of 90°, i.e. a sinusoidal signal and a cosinusoidal signal, which are both proportional to twice the angle of rotation α, allowing to uniquely determine the angle of rotation of the valve, which may be a value of up to 120°.