Motor control device and image forming apparatus

摘要

A motor control device comprises: a motor control unit; and a signal output unit, wherein the motor control unit controls a motor based on an output signal of the signal output unit, wherein the motor control unit is configured to function as: a first control unit performs a first motor control, in which a current upper limit is estimated based on a rotation speed of the motor and is input to the motor, a second control unit performs a second motor control, in which a second driving current, which is a driving current lower than the first driving current at the end of the first motor control is input, a third control unit performs a third motor control, in which a third driving current to be input to the motor is determined, and a switching unit that sequentially switches the first, second, and third control units.

主权项

1. A motor control device comprising:
a motor control unit configured to control a motor; and a signal output unit configured to output a signal according to rotation of the motor, wherein the motor control unit controls the motor based on an output signal of the signal output unit so that a driven object, driven by the motor, is displaced to a target stop position, wherein the motor control unit is configured to function as:
a first control unit, a second control unit, a third control unit; anda switching unit configured to sequentially switch between the first, second, and third control units, wherein the first control unit is configured to perform a first motor control, in which a current upper limit, which is an upper limit of current applicable to the motor and is adjusted by current degradation caused by a counter-electromotive force, is estimated based on a rotation speed of the motor specified from an output signal of the signal output unit, and in which a first driving current corresponding to the estimated current upper limit is input to the motor, wherein the second control unit is configured to perform a second motor control, in which a second driving current is input to the motor, the second driving current being at least one of: a driving current lower than the first driving current input to the motor at an end of the first motor control of the first control unit, and a driving current lower than a driving current to be input to the motor if the first control unit controls the motor based on a current upper limit estimated from a present rotation speed of the motor, is input to the motor, and wherein the third control unit is configured to perform a third motor control, in which a third driving current to be input to the motor is determined based on at least one of a speed and a displacement amount, as an operation amount of one of the motor and the driven object, specified from the output signal of the signal output unit, and a target trajectory of the operation amount, and in which the third driving current is input so that the driven object is displaced up to the target stop position corresponding to the target trajectory.