公开(公告)号：US09954468B2

公开(公告)日：2018-04-24

申请号：US14081524

申请日：2013-11-15

Applicant: S-PRINTING SOLUTION CO., LTD.

Inventor： Hyoung-il Kim ,  Yong-ho You ,  Seong-ho Shin ,  Young Jung Yun ,  Tae-young Kim ,  Geon-hoon Kim ,  Ho-bin Hwang ,  Ji-young Byun

IPC: H02P6/16 ,  H02P6/08 ,  H02P6/34

CPC classification number: H02P6/08 ,  H02P6/06 ,  H02P6/34 ,  H02P23/0004 ,  H02P23/22

Abstract: An image forming apparatus includes an engine unit to perform an image forming job; an engine control unit to control the operation of the engine unit; a brushless direct current (BLDC) motor to drive the engine unit; a sensor unit to sense electric angle information and driving velocity information of the BLDC motor; a communication interface to receive a digital control command with respect to the BLDC motor from the engine control unit; a driving signal unit to generate a driving signal to control the BLDC motor; and a digital control unit to control the operation of the driving signal unit in a digital phase locked loop (PLL) manner for feedback controls the BLDC motor, based on the received digital control command, the detected electric angle information and the driving velocity information and a digital gain value as a control factor with respect to the BLDC motor.