公开(公告)号：US10171017B2

公开(公告)日：2019-01-01

申请号：US14177433

申请日：2014-02-11

Applicant: S-PRINTING SOLUTION CO., LTD.

Inventor： Yong-ho You ,  Hak-young Kim ,  Ji-young Byun ,  Sang-hyuk Jung ,  Ho-bin Hwang

IPC: H02P27/08 ,  H02P6/12 ,  H02P6/14 ,  H02P8/38 ,  H02P8/12

Abstract: An image forming apparatus may include an engine portion used to perform an image forming job, a step motor configured to start the engine portion, a driver including a resistor that measures current that flows to a coil of the step motor and is configured to provide a predetermined constant current to the step motor, and a drive controller configured to measure a load level of the step motor based on a voltage value of the resistor and to control the driver to provide the constant current that corresponds to the measured load level.