Patent ID: 6414482
Filing Date: 2002-07-02
Classification: F02D,G01D

Abstract:
A sensor core used in a non-contract type rotational angle sensor for detecting a rotational angle of an object in non-contact therewith by converting the rotational angle to a change in magnetic force, the sensor core including:a stator core provided with two blocks made of a magnetic material; a mover core provided with two blocks made of a magnetic material, disposed coaxially with the stator core; a first gap produced between the stator core and the mover core; a second gap produced between the two stator blocks; a third gap produced between the two mover blocks; and a rectangular parallelepiped magnet disposed in the third gap and magnetized in a direction across the third gap to connect the mover blocks, wherein the stator core has a radial dimension changing to produce the first gap stepwise so as to become largest in a vicinity of a center line of the second gap and the mover core has a radial dimension correspondingly changing.