| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor controller enabling a high frequency response by shortening a speed detection period in which a torque ripple is suppressed. <P>SOLUTION: The motor controller comprises a speed detector for detecting a motor speed as a physical quantity, and a position detector for detecting the rotational position of the motor. Since the gain or offset error of the former output is corrected with a signal obtained by time-differentiating the latter output, a speed detection signal having a high frequency response and a small ripple component is obtained. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
