| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a controller for motors that detects the position of the rotor of a motor or a signal for rotation speed from a position detector or a speed detector in a low-speed range and estimates it in a high-speed range. <P>SOLUTION: The controller for motors includes: an estimator that estimates at least the rotation speed, of the rotor position and the rotation speed of a motor, from the current of the motor; a detector that detects at least the rotation speed, of the rotor position and the rotation speed of the motor; and a selector that selects the output of the estimator when the rotation speed of the output of the estimator or the detector is greater than a predetermined value and the output of the detector when it is smaller than the predetermined value, and produces output. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
