| 摘要 |
<p>A motor control device (34) has characteristic information that indicates a correlation between a rotation speed and a current of a motor (42). The motor control device (34) sets a rotation speed characteristic value that is a reference value of the rotation speed of the motor (42) and a current characteristic value that is a reference value of the current of the motor (42) on the basis of the characteristic information. The motor control device (34) calculates an estimated rotation speed on the basis of a measured value of a voltage that is applied to the motor, a measured value of the current, the current characteristic value, a voltage characteristic value, the rotation speed characteristic value and a counter-electromotive force constant.</p> |
