| 摘要 |
PURPOSE: A position sensor is provided to have an improved structure utilizing a magnetic field induction method by a coil as a magnetic flux generating member. CONSTITUTION: A position sensor (100) includes a first rotor (110), a second rotor (120), an upper magnetic flux collecting ring (130), a lower magnetic flux collecting ring (140), and a magnetic sensor. The first rotor is rotated with an input shaft to be integrated. A first coils are coiled around the outer periphery of a cylinder forming the first rotor, and a plurality of first toothed gears (111) is protruding in all directions from the outer circumference or the inner circumference of the axial lower part of the first rotor. The second rotor is axially arranged to be parallel to the first rotor and rotated with the output shaft to be integrated. A second coil is coiled around the outer periphery of a cylinder forming the second rotor, and a plurality of second toothed gears (121) is protruding in all directions from the outer circumference or the inner circumference of the axial upper part of the second rotor and faces the first toothed gears. The upper magnetic flux collecting ring is arranged to face the upper part of the cylinder of the first rotor and collect magnetic flux becomes changed according to the difference of the area in which the first and second toothed gears are faced by the relative rotation of the first and second rotors. |
