Apparatus and method for electric motor control

2000 
A motor control apparatus for driving and controlling a synchronous motor with a motor winding having a plurality of phase windings, with - a control data generating means (12, 13, 14) responsive to the output of a command to adjust the speed to generate control data for each of the plurality of phase windings for driving the synchronous motor; - a motor current detecting means (6) for detecting the motor current in the phase windings, to output a motor current signal; - from a phase difference detecting means (8) for detecting a motor driving voltage of each motor phase by a sine data generating unit (14) control values ​​generated and a of the motor current detecting means (6) for the associated motor phase output motor current signal to the phase difference between the motor drive voltage and the motor current signal as Phasendif conference information issue, wherein the phase difference detecting means (8) for each two with respect to the maximum or minimum of the sinusoidal drive voltage is symmetrical portions at each generated by two half waves of a period of from the sine data generating device (14) for each motor phase driving voltage and for each of the areas evaluates the associated motor current signal , by...
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