Shift range control device
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United States of America Patent
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-
Jul 26, 2022
Grant Date -
Jul 22, 2021
app pub date -
Apr 8, 2021
filing date -
Oct 10, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
A shift range control device includes a signal receiver, an abnormality monitor, and a drive controller. The signal receiver acquires an encoder signal from an encoder capable of outputting three or more phase encoder signals having different phases. The abnormality monitor monitors an abnormality of the encoder. The drive controller controls drive of a motor by switching an energized phase of a motor winding so that a rotation position of the motor becomes a target rotation position according to a target shift range. When the abnormality of the encoder is detected, the driver controller drives the motor by faulty phase identification control to identify a faulty phase that is a phase in which an abnormality of the encoder signal occurs, and a normal phase in which the encoder signal is normal.
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