公开(公告)号：US20150028791A1

公开(公告)日：2015-01-29

申请号：US14332987

申请日：2014-07-16

Applicant: KONICA MINOLTA, INC.

Inventor： Takahiro TSUJIMOTO ,  Hideki NAKAMURA ,  Takeshi ISHIDA ,  Naoto SUGAYA ,  Akimasa ISHIKAWA

IPC: H02P8/12 ,  G03G15/00

CPC classification number: H02P8/12 ,  G03G15/06 ,  G03G15/5008 ,  G03G15/6529

Abstract: An image forming apparatus drives and rotates at least one of a photosensitive drum and a transport roller with use of a stepping motor in a multi-phase excitation mode. The image forming apparatus includes: a constant-voltage control unit controlling the stepping motor by applying a constant voltage for each phase; a constant-current control unit controlling the stepping motor by regulating an amount of current for each phase by a chopping control; a measuring unit measuring a chopping count of each phase on a per-step basis; a chopping count determination unit determining whether the chopping count of each phase is less than or equal to a predetermined count; and a control switching unit causing the constant-voltage control unit to control the stepping motor when the chopping count determination unit determines affirmatively, and causing the constant-current control unit to control the stepping motor when the chopping count determination unit determines negatively.

Abstract translation: 图像形成装置利用多相励磁模式中的步进电机来驱动和旋转感光鼓和输送辊中的至少一个。 图像形成装置包括：恒压控制单元，通过对各相施加恒定电压来控制步进电动机; 恒流控制单元，其通过斩波控制来调节各相的电流量来控制所述步进电动机; 测量单元，测量每个阶段的每个阶段的切碎计数; 斩波计数确定单元，确定每相的斩波计数是否小于或等于预定计数; 以及控制切换单元，其使得所述恒压控制单元在所述切断计数确定单元肯定地确定时控制所述步进电机，并且当所述切断计数确定单元判定为否定时，使所述恒流控制单元控制所述步进电机。

公开(公告)号：US20150256079A1

公开(公告)日：2015-09-10

申请号：US14643398

申请日：2015-03-10

Applicant: Konica Minolta, Inc.

Inventor： Taku KIMURA ,  Mikiyuki AOKI ,  Hideki NAKAMURA ,  Masahiro NONOYAMA ,  Junichi MASUDA ,  Yohei YAMADA

IPC: H02J1/00 ,  G03G15/00

CPC classification number: G03G15/80 ,  H02M3/33507 ,  H02M7/217 ,  H02M2001/0035 ,  H02M2001/007 ,  H02M2001/008 ,  Y02B70/16

Abstract: An electric power supply control device comprises AC/DC converter, DC/DC converters, and an output electrical voltage monitor unit of the AC/DC converter. When output electrical voltage of the AC/DC converter increases to the first preset value P1, the AC/DC converter stops the convert. When the output electrical voltage decreases to the second preset value P2, the AC/DC converter restarts the convert. The first preset value P1 is equal to or less than the lowest value, out of the upper limit values in electrical voltage ranges in which the DC/DC converters CV1 and CV2 can work. The second preset value P2 is more than or equal to the highest value, out of the lower limit values in electrical voltage ranges in which the DC/DC converters CV1 and CV2 can work.

Abstract translation: 电源控制装置包括AC / DC转换器，DC / DC转换器和AC / DC转换器的输出电压监视器单元。 当AC / DC转换器的输出电压升高到第一预设值P1时，AC / DC转换器停止转换。 当输出电压降至第二预设值P2时，AC / DC转换器重新启动转换。 在DC / DC转换器CV1和CV2可以工作的电压范围内，第一预置值P1等于或小于最低值。 在DC / DC转换器CV1和CV2可以工作的电压范围内，第二预设值P2大于或等于最大值。