Stepping motor driving apparatus, image carrier rotation driving apparatus and image forming apparatus

摘要

A stepping motor driving apparatus includes a stepping motor having a rotor, a driving unit configured to drive the stepping motor, and a rotation position detection unit configured to detect a rotation angle of the rotor. A control unit calculates a magnetic pole position of the stepping motor based on a first detection result and a second detection result. The stepping motor rotates by a predetermined step in one rotation direction from an initial position and thereafter rotates by the predetermined step in the other rotation direction so that the stepping motor is in a first held state. The first detection result is detected in the first held state. The stepping motor rotates by the predetermined step in the other rotation direction from the initial position and thereafter rotates by the predetermined step in the one rotation direction so that the stepping motor is in a second held state.

主权项

1. A stepping motor driving apparatus, comprising:
a stepping motor having a rotor; a driving unit configured to drive the stepping motor; a rotation position detection unit configured to detect a rotation angle of the rotor of the stepping motor; and a control unit configured to output a signal to control the driving unit and configured to calculate a magnetic pole position of the stepping motor based on a detection result detected by the rotation position detection unit, wherein the control unit is configured to calculate the magnetic pole position based on a first detection result and a second detection result, wherein the control unit causes the stepping motor to rotate by a predetermined step in one rotation direction from an initial position and thereafter the control unit causes the stepping motor to rotate by the predetermined step in an opposite rotation direction so that the stepping motor is in a first held state, the first detection result is detected by the rotation position detection unit in the first held state, and wherein the control unit causes the stepping motor to rotate by the predetermined step in the opposite rotation direction in the first held state and thereafter the control unit causes the stepping motor to rotate by the predetermined step in the one rotation direction so that the stepping motor is in a second held state, and the second detection result is detected by the rotation position detection unit in the second held state.