| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve efficient drive, by phase compensation of rotational position signals without making an error in the direction of compensating the corrected amount, even if load change occurs. <P>SOLUTION: To achieve efficient drive without making an error in the direction of compensating the corrected amount, even if the load change occurs, by detecting phase shift from the symmetry of an induced voltage that is generated during a conduction-off period before and after a conduction-on time, using 1/2 period of the conduction-on as the axis of symmetry for the detection of the phase shift. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
