Motor control circuit and method
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United States of America Patent
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Oct 17, 2017
Issued Date -
N/A
app pub date -
Dec 20, 2014
filing date -
Dec 20, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
In accordance with an embodiment, a stopping circuit includes a detection circuit connected to a subtraction amount determination circuit. A subtraction circuit is connected to the subtraction circuit and the subtraction circuit is coupled for receiving an output signal from the subtraction amount determination circuit. A duty determination is connected to the subtraction circuit and a state controller is connected to the duty determination circuit. A counter is connected to a state controller. In accordance with another embodiment a method for stopping a motor is provided by decreasing a duty of a drive signal. The duty of the drive signal is lowered from a first level to a predetermined level. A braking state is entered in response to the duty of the pulse width modulation signal achieving the predetermined level.
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