Step motor drive device
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United States of America Patent
Stats
-
Dec 26, 2023
Grant Date -
Sep 14, 2023
app pub date -
Aug 26, 2020
filing date -
Sep 25, 2019
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A step motor drive device includes a step motor including a rotor, stators, and a coil, a drive circuit that outputs a drive signal including a plurality of partial signals that are output intermittently, a detecting circuit that detects an electromagnetic induced current that is generated in the coil after the partial signals are output, and a control unit that controls the drive circuit. The drive circuit outputs one of the partial signals included in the drive signal to the coil, and, in response to a change in an electromagnetic induced current generated in the coil after the partial signal is output, outputs a next partial signal to the coil. The control unit determines a control method of the step motor based on an interval of the plurality of partial signals, and controls the drive circuit based on the determined control method.
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