Motor control apparatus, sheet conveying apparatus, document feeding apparatus, document reading apparatus, and image forming apparatus
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United States of America Patent
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May 28, 2019
Grant Date -
Jan 11, 2018
app pub date -
Jun 15, 2017
filing date -
Jul 7, 2016
priority date (Note) -
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Abstract
According to an aspect of the present invention, a motor control apparatus includes a first driving circuit connected to a motor first phase winding and having H bridge circuit first switching elements, a second driving circuit connected to second phase winding of the motor and having H bridge circuit second switching elements, first and second pulse generators. a detector, an estimator, and a selector. The first pulse generator generates a first PWM signal having a first level signal and a second level signal. The second pulse generator generates a second PWM signal having a first and a second level signal. The selector selects whether to detect a driving current flowing through the first phase winding or to estimate a driving current flowing through the first phase winding. The first pulse generator generates the first PWM signal based on a driving current value output from the detector or the estimator.
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