Patent ID: 7960933
Filing Date: 2011-06-14
Classification: F16H,H02P

Abstract:
1. A motor control apparatus that controls a rotational position of an electric motor, which is used as a drive source to change an operational position of a control subject, to a target position of the electric motor that corresponds to a target operational position of the control subject, the motor control apparatus comprising: a delimiting position learning means for learning one of first and second delimiting positions of a movable range of the control subject, which correspond to first and second rotational positions of the electric motor, respectively, by rotating the electric motor to a corresponding one of the first and second rotational positions, which corresponds to the one of the first and second delimiting positions of the movable range of the control subject; a climb correction amount setting means for setting a climb correction amount for a learning value of the one of the first and second delimiting positions, which is learned by the delimiting position learning means, to correct the learning value of the one of the first and second delimiting positions in view of presence of a relatively small angle of rotation of the electric motor beyond the corresponding one of the first and second rotational positions upon the rotation of the electric motor to the corresponding one of the first and second rotational positions at time of learning the one of the first and second delimiting positions by the delimiting position learning means; a reference position learning means for learning a reference position by correcting the learning value of the one of the first and second delimiting positions by the climb correction amount; a target position setting means for setting the target position of the electric motor based on the reference position at time of changing the operational position of the control subject; and a motor temperature information determining means for sensing or estimating motor temperature information, which is one of a temperature of the electric motor and a temperature that relates to the temperature of the electric motor, wherein the climb correction amount setting means sets the climb correction amount according to the motor temperature information.