Patent ID: 8013563
Filing Date: 2011-09-06
Classification: F16H,H02P,Y10T

Abstract:
1. A motor control apparatus comprising: an encoder for producing a pulse output signal in synchronism with rotation of a rotor of a motor; and control means for feedback-controlling the rotor to a target position by detecting a rotation position of the rotor on the basis of a count of the output signal of the encoder and sequentially switching a current supply phase of the motor, wherein the control means has a first correction part that corrects an amount of phase lead of the current supply phase with respect to a rotation phase of the rotor in accordance with a rotation speed of the rotor, and the control means further has a second correction part that corrects the amount of phase lead of the current supply phase in a direction to decrease relative to the amount of phase lead determined by the first correction part, when the rotation speed of the rotor is required to decrease.