Sensorless technology, estimation of sampled back EMF voltage values and/or the sampled inductance values based on the pulse width modulation periods
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United States of America Patent
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Sep 10, 2013
Grant Date -
Jan 7, 2010
app pub date -
Jul 4, 2007
filing date -
Jul 5, 2006
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Abstract
The methods and devices provided herein include methods and devices for controlling a permanent magnet motor. In one implementation, a method is provided that allows for the determination of the values of the phase back EMF voltage and of the phase inductances while the phases are powered with a PWM (Pulse Width Modulation) controlled current and/or voltage.
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