公开(公告)号：US20160139531A1

公开(公告)日：2016-05-19

申请号：US14932434

申请日：2015-11-04

Applicant: Konica Minolta, Inc.

Inventor： Makoto SHIMAZOE ,  Akihiro HAYASHI ,  Hiroyuki YOSHIKAWA ,  Toshikazu HIGASHI

IPC: G03G15/02

CPC classification number: G03G15/0266 ,  G03G15/0136 ,  G03G15/80

Abstract: An image forming apparatus includes: a plurality of image forming units forming an image in the corresponding color by electrophotographic system; a high-voltage power supply circuit capable of generating a bias voltage; and a control unit that controls a first printing mode and a second printing mode, wherein in the second printing mode, the control unit performs such control that the photosensitive bodies provided on the image forming units not used in the second printing mode continuously rotate at a speed lower than a speed in the first printing mode, and/or such control that a bias voltage whose absolute value is less than an absolute value of a bias voltage in the first printing mode is supplied from the high-voltage power supply circuit to the processing components of the same type provided on the image forming units not used in the second printing mode.

Abstract translation: 图像形成装置包括：多个图像形成单元，通过电子照相系统形成相应颜色的图像; 能够产生偏置电压的高压电源电路; 以及控制单元，其控制第一打印模式和第二打印模式，其中在所述第二打印模式中，所述控制单元执行这样的控制，使得设置在不在第二打印模式中使用的图像形成单元上的感光体在 速度低于第一打印模式中的速度，和/或这样的控制：将绝对值小于第一打印模式中的偏置电压的绝对值的偏置电压从高压电源电路提供给 处理在第二打印模式中未使用的图像形成单元上提供的相同类型的处理部件。

公开(公告)号：US20230176515A1

公开(公告)日：2023-06-08

申请号：US17968455

申请日：2022-10-18

Applicant: Konica Minolta, Inc.

Inventor： Hiroyuki YOSHIKAWA ,  Hitoshi ASANO ,  Yumiko IZUMIYA ,  Yasuhiro KOIDE

IPC: G03G15/00 ,  B65H43/00 ,  G01N21/3554 ,  G01N21/359 ,  G01N27/04 ,  G01N21/86 ,  G01N3/06 ,  G01N3/20

CPC classification number: G03G15/5029 ,  B65H43/00 ,  G01N21/3554 ,  G01N21/359 ,  G01N27/04 ,  G01N21/86 ,  G01N3/06 ,  G01N3/20 ,  G03G15/6529 ,  B65H2515/81 ,  B65H2515/70 ,  B65H2553/40 ,  B65H2515/805 ,  G01N2203/0023 ,  G01N2203/06

Abstract: Paper physical property detecting device includes a first detector that measures a sheet of paper (hereinafter, merely referred to as a paper) made to stop temporarily on a conveyance path and acquires a first value corresponding to a first physical property, a second detector that measures a paper while conveying the paper on the conveyance path and acquires a second value corresponding to a second physical property with regard to a physical property different from the first physical property; and a corrector that corrects the first value on a basis of the second value and creates post correction data.

公开(公告)号：US20230008381A1

公开(公告)日：2023-01-12

申请号：US17854777

申请日：2022-06-30

Applicant: Konica Minolta, Inc.

Inventor： Yuta TACHIBANA ,  Hiroyuki YOSHIKAWA ,  Kazumichi YOSHIDA ,  Satoshi MIYAJIMA ,  Kouei CHO

IPC: H02P6/16 ,  H02P21/22

Abstract: A rotation detector includes a motor, a current detector and a hardware processor. The motor includes coils of two or more phases and a rotor. The current detector detects currents flowing in coils of at least two phases among the coils of two or more phases. The hardware processor estimates an initial position of the rotor based on current values of the currents detected by the current detector to start the motor, controls an energization pattern on the phases to rotate and start the motor based on the estimated initial position, and determines whether the rotor stops or is rotating before completing the estimation of the initial position.

公开(公告)号：US20200295689A1

公开(公告)日：2020-09-17

申请号：US16815588

申请日：2020-03-11

Applicant: Konica Minolta, Inc.

Inventor： Yuta TACHIBANA ,  Hiroyuki YOSHIKAWA ,  Yuji KOBAYASHI ,  Kazumichi YOSHIDA ,  Daichi SUZUKI ,  Harumitsu FUJIMORI

IPC: H02P21/18 ,  H02P21/22 ,  H02P27/12 ,  G03G15/00

Abstract: In a motor control device in one embodiment, an initial position estimation unit estimates an initial position of a magnetic pole of a rotor of a motor in an inductive sensing scheme. At each of energization angles, the initial position estimation unit multiplies a γ-axis current component Iγ corresponding to a peak value of a current flowing through a stator winding by each of a cosine value and a sine value of a correction angle obtained by correcting each of the energization angles. The initial position estimation unit estimates the initial position of the magnetic pole of the rotor based on a ratio between an integrated value of a multiplication result about the cosine value and an integrated value of a multiplication result about the sine value.

公开(公告)号：US20200266745A1

公开(公告)日：2020-08-20

申请号：US16785959

申请日：2020-02-10

Applicant: KONICA MINOLTA, INC.

Inventor： Yuta TACHIBANA ,  Hiroyuki YOSHIKAWA ,  Daichi SUZUKI

IPC: H02P21/18 ,  H02P27/12 ,  H02P21/22 ,  G03G15/00

Abstract: In a motor control device, when estimating an initial position of a magnetic pole of a rotor of a motor, a drive circuit continuously or intermittently applies a voltage to a stator winding at each of a plurality of energization angles while sequentially changing the energization angles, and at a voltage value and for an energization time period, the voltage value and the energization time period being set such that the rotor does not rotate. An initial position estimation unit calculates an estimated initial position of the magnetic pole of the rotor based on a phase angle of a trigonometric function curve that approximates a change of a γ-axis current Iγ with respect to each of the energization angles. The trigonometric function curve has a cycle equal to one electrical cycle of the motor.

公开(公告)号：US20150301491A1

公开(公告)日：2015-10-22

申请号：US14687580

申请日：2015-04-15

Applicant: Konica Minolta, Inc.

Inventor： Hiroyuki YOSHIKAWA ,  Yuta TACHIBANA ,  Takaki KATO ,  Daichi SUZUKI

IPC: G03G15/00 ,  B65H7/20 ,  B65H7/06 ,  B65H5/06 ,  B65H5/26

CPC classification number: B65H7/20 ,  B65H5/062 ,  B65H5/068 ,  B65H5/26 ,  B65H7/06 ,  G03G15/6529 ,  G03G15/6564 ,  G03G2215/00599 ,  G03G2215/00603 ,  G03G2215/00945 ,  G03G2215/0132 ,  G03G2215/0196

Abstract: An image forming apparatus includes a conveyance sensor disposed near a pair of conveyance rollers so as to accurately detect an amount of movement of the recording paper, a conveyance delay determination unit to determine a conveyance delay of the recording paper, and a conveyance control unit to control drive for rollers. The conveyance delay determination unit obtains conveyance delay information from among information detected with the conveyance sensor, or the like, and accelerates a rotational velocity of the pair of paper feed rollers when the conveyance delay quantity exceeds a threshold.

Abstract translation: 图像形成装置包括设置在一对输送辊附近的输送传感器，以便精确地检测记录纸的移动量;输送延迟确定单元，用于确定记录纸的输送延迟;以及输送控制单元， 滚筒控制驱动。 输送延迟确定单元从输送传感器检测到的信息中获取输送延迟信息等，并且当输送延迟量超过阈值时加速一对给纸辊的旋转速度。