| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor control device which can reduce an operation processing time and generate a torque most efficiently with respect to the same current, for a brushless motor having inverse saliency. <P>SOLUTION: The device has current phase angle deriving means 11 for storing an advanced angle amount Φ of a current phase as a predetermined function corresponding to an absolute value (magnitude) of a current command. A current command value I* determined by dividing a torque command value T by a torque constant Kt, is input to an absolute value converter 12. An absolute value ¾I*¾ of obtained current command is input into the current phase angle deriving means 11. An advanced angle amount Φ (cosΦ and -sinΦ) corresponding to the absolute value ¾I*¾ of the current command, is derived. A q-axis current command value is obtained by multiplying the current command value I* by the advanced angle amount cosΦ. A d-axis current command value is obtained by multiplying the absolute value ¾I*¾ of the current command by the advanced angle amount -sinΦ. <P>COPYRIGHT: (C)2009,JPO&INPIT |
