Rotational angle detection device comprises magnetic element for producing magnetic field and magnetic sensor with pair of sensor elements for detecting change in magnetic field

摘要

The rotational angle detection device (10) comprises a magnetic element (12) for producing a magnetic field. A magnetic sensor (20) is for detecting a change in the magnetic field, when the magnetic element rotates relative to the sensor around a rotation axis (200). The magnetic sensor has a pair of sensor elements (22,22') arranged in an imaginary level perpendicular to the rotation axis. The detecting surfaces (23,23') of the sensor element have an angle of 90 degrees to each other, and each of the elements is bent at an angle of 45 degrees to a straight line (202).