Method and related driver of a permanent magnet synchronous electric motor
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United States of America Patent
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Feb 9, 2016
Grant Date -
Jan 22, 2015
app pub date -
Jul 9, 2014
filing date -
Jul 19, 2013
priority date (Note) -
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Abstract
A method of driving a permanent magnet synchronous electric motor includes sensing or estimating a back electromotive force induced in at least a winding of the motor by the rotation of a rotor of the motor; and reading, from a memory, values of a first voltage waveform having a phase angle with respect to the back electromotive force. The method also includes generating a driving voltage corresponding to the sum of values of a control voltage, obtained as product of the values of the first voltage waveform by a first coefficient determined as a function of a desired value of motor torque, and values of a cancelation voltage of the back electromotive force. The method also includes applying the driving voltage at the motor winding.
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