| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor drive control device that drives a motor without being affected by detection errors of a rotor position. <P>SOLUTION: The motor drive control device 1 includes Hall sensors 2u, 2v and 2w, a detection-error calculating part 4, a correction part 6, and a drive-voltage generating part 7. The Hall sensors 2u, 2v and 2w detect the magnetic poles provided in a rotor 53 so as to output position detection signals Hu, Hv and Hw. The detection-error calculating part 4 calculates a detection error of the position of the rotor 53 in the Hall sensors 2u, 2v and 2w on the basis the position detection signals Hu, Hv and Hw when the rotational frequency of a motor 51 is less than a first prescribed rotational frequency. The correction part 6 corrects the position detection signals Hu, Hv and Hw by the detection error when the rotational frequency of the motor 51 exceeds the first prescribed rotational frequency. The drive-voltage generating part 7 generates drive voltages SU, SV and SW on the basis of the corrected position detection signals Hu', Hv' and Hw' so as to output them to the motor 51. <P>COPYRIGHT: (C)2010,JPO&INPIT |
