Motor driver apparatus and method of controlling the same
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United States of America Patent
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Jan 5, 2016
Grant Date -
Oct 16, 2014
app pub date -
Apr 7, 2014
filing date -
Apr 16, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A motor driver apparatus that is formed of a semiconductor integrated circuit which is supplied with an electric power and drives a direct current motor includes a signal generating part that generates an indication signal for indicating a back electromotive force generation period while the direct current motor generates a back electromotive force, a removing part that detects a voltage variation generated in a power-supply voltage by the back electromotive force generated by the direct-current motor during the back electromotive force generation period indicated by the indication signal, and removes the detected voltage variation, and a limiting part that limits the power-supply voltage so as to be less than a predetermined voltage at a speed higher than that in the removing part.
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