Motor control device and game machine
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United States of America Patent
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Jun 25, 2019
Grant Date -
Jan 25, 2018
app pub date -
Jun 22, 2017
filing date -
Jul 21, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
In a motor control device, a communication interface receives a control command defining a target rotation amount and a target rotation speed of a motor. A sensor interface receives a detection signal from a rotation angle sensor outputting a detection signal in every rotation of the motor at a predetermined angle. A controller decides a set value of a rotation speed of the motor. A drive signal generator generates and outputs a drive signal for rotating the motor. The controller calculates a difference between the target rotation amount and a total rotation amount of the motor from start of execution of the control command, based on the number of received detection signals, and determines whether an abnormality occurs in operation of the motor based on an update frequency of a minimum value of the difference or a non-update period when the minimum value of the difference is not updated.
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