Brushless motor driving apparatus and printing apparatus including brushless motor driving apparatus

摘要

The operation accuracy of a printing unit is improved in a printing apparatus. To accomplish this, a motor driving apparatus includes a brushless motor having coils of a plurality of phases, and a plurality of detection units that output voltages in accordance with rotation of a rotor, a driving unit that drives the brushless motor by switching a current supply destination between the coils of the plurality of phases based on a control signal, and a generation unit that generates the control signal based on addition results of detection signals output from the plurality of detection units, and correction signals based on differences between a predetermined voltage corresponding to a rotation angle of the rotor and voltages corresponding to the rotation angle of the rotor that are obtained from the plurality of detection units.

主权项

1. A motor driving apparatus comprising:
a motor including coils of a plurality of phases, and a plurality of detection units that output voltages by detecting a magnetic field changing along with rotation of a rotor; a driving unit that drives said motor by switching a current supply destination between the coils of the plurality of phases based on a signal; a determination unit that determines a correction value based on a difference between a predetermined voltage corresponding to a rotation angle of the rotor and a voltage, output from at least one of the plurality of detection units, corresponding to the rotation angle of the rotor, and a generation unit that generates the signal based on voltages output from the plurality of detection units and the correction value.