Patent ID: 9543869
Date: 2017-01-10
CPC Classifications: G03G,H02P

Claim:
1. A motor control apparatus installable in an image forming apparatus, the motor control apparatus comprising: a detector configured to detect rotation of a motor to output a feedback signal; a measurer configured to measure position counts by counting at least one of rising edges and falling edges of a target signal and the feedback signal output from the detector using a reference clock signal; and a calculator configured to determine a control time at which the motor control apparatus performs a control of the motor, to calculate position error of the motor from the measured position counts of the target signal and feedback signal, and to calculate a control value for compensating for the position error, wherein the determined control time is at a falling edge of the target signal, if the position counts are measured at a rising edge of the target signal, and the determined control time is at a next rising edge of the target signal, if the position counts are measured at the falling edge of the target signal, and wherein the calculator calculates position count error from a difference between the position count of the target signal and the position count of the feedback signal, and calculates position error of the motor by multiplying the position count error by a reference time.