A rotation angle sensor has at least three detection elements for detecting a change in a physical quantity corresponding to a rotation position of a detection target, outputs rotation number information of the detection target corresponding to a detection value of at least one of the detection elements, and outputs rotation angle information of the detection target corresponding to the detection values of each of the detection elements as at least one analog signal and at least one digital signal. A control unit has an absolute angle calculation part and an abnormality determination part. The absolute angle calculation part outputs to a control calculation portion an absolute angle calculated using either the analog rotation angle, which is a rotation angle based on an analog signal, or the digital rotation angle, which is a rotation angle based on a digital signal, that is determined to be normal.
ROTATION DETECTION DEVICE
2025-03-06
Patent
Electronic Resource
English