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1. 发明授权

US10139767B2 Image forming apparatus controlling recording sheet conveyance speed 有权
公开(公告)号：US10139767B2
公开(公告)日：2018-11-27
申请号：US15176462
申请日：2016-06-08
申请人： KONICA MINOLTA, INC.
发明人： Yuji Kobayashi , Harumitsu Fujimori , Hiroshi Hiraguchi , Satoshi Chikazawa , Takaki Kato
IPC分类号： G03G15/00
摘要： An image forming apparatus that transfers an image from an image carrier onto a sheet passing between the image carrier rotating and a transfer member includes a fixing unit configured to thermally fix the image on the sheet while nipping and conveying the sheet with a pair of fixing members after the transfer, at least one of the fixing members rotating; a measuring unit configured to measure surface movement speed of the sheet in a non-contact manner while the sheet is being conveyed by the fixing members; and a control unit configured to control rotation speed of the fixing members in accordance with a result of the measurement, to adjust speed of conveyance of the sheet to a target speed determined beforehand for peripheral speed of the image carrier, the control being performed while the sheet being conveyed is in contact with the transfer member and the fixing members.

2. 发明申请

US20180175751A1 CONTROLLER FOR PERMANENT MAGNET SYNCHRONOUS MOTOR, CONTROL METHOD, AND IMAGE FORMING APPARATUS 审中-公开
公开(公告)号：US20180175751A1
公开(公告)日：2018-06-21
申请号：US15839981
申请日：2017-12-13
申请人： Konica Minolta, Inc.
发明人： Kazumichi Yoshida , Katsuhide Sakai , Tomonobu Tamura , Hitoshi Asano , Harumitsu Fujimori
IPC分类号： H02P3/02 , H02P3/14 , H02P21/36 , G03G15/00
CPC分类号： H02P3/025 , G03G15/6529 , H02P3/14 , H02P21/36
摘要： A controller for a permanent magnet synchronous motor having a rotor using a permanent magnet is provided. The rotor rotates by a rotating magnetic field caused by a current flowing through an armature. The controller starts a deceleration control of reducing a rotational speed of the rotor when a stop command is inputted in a state where the rotor rotates at a predetermined rotational speed; and performs a fixed excitation control when the rotational speed is reduced to a set speed. The fixed excitation control includes setting a current for causing a magnetic field vector for stopping the rotor at a target position in accordance with an amount of rotation of the rotor since the deceleration control has started and passing the current through the armature.

3. 发明授权

US11223309B2 Motor control device, method of estimating initial position of magnetic pole of rotor, and image forming apparatus 有权
公开(公告)号：US11223309B2
公开(公告)日：2022-01-11
申请号：US16794043
申请日：2020-02-18
申请人： KONICA MINOLTA, INC.
发明人： Hiroyuki Yoshikawa , Yuta Tachibana , Yuji Kobayashi , Kazumichi Yoshida , Daichi Suzuki , Harumitsu Fujimori
IPC分类号： H02P21/18 , H02P21/22 , H02P27/12 , G03G15/00 , H02P21/34
摘要： In a motor control device that controls a sensorless-type motor, a controller estimates an initial magnetic pole position of a rotor of a motor by an inductive sensing scheme while sequentially setting a plurality of energization angles. At each of the set energization angles, the controller converts peak values of currents flowing through a plurality of phases of a stator winding into a first current component having an electrical angle that is equal to a corresponding one of the set energization angles and a second current component that is different in electrical angle by 90 degrees from the first current component, to correct the first current component based on the second current component. The controller estimates the initial magnetic pole position of the rotor based on the corrected first current component that is obtained at each of the set energization angles.

4. 发明授权

US10075607B2 Reading apparatus, reading method, and reading program 有权
公开(公告)号：US10075607B2
公开(公告)日：2018-09-11
申请号：US15444433
申请日：2017-02-28
申请人： Konica Minolta, Inc.
发明人： Hitoshi Asano , Katsuhide Sakai , Tomonobu Tamura , Harumitsu Fujimori
IPC分类号： H04N1/04 , H04N1/031 , H04N1/028 , H04N1/03
CPC分类号： H04N1/0318 , H04N1/0285 , H04N1/02865 , H04N1/02895 , H04N1/0306 , H04N2201/0081 , H04N2201/02487 , H04N2201/02493 , H04N2201/02497
摘要： A reading apparatus that reads a sheet includes: a first light emitting diode (LED) configured to emit light with a specific wavelength; a light emitting element including a second LED configured to emit light with the specific wavelength and a phosphor configured to be excited by the light emitted from the second LED; a line sensor configured to generate a reference signal according to a quantity of received light emitted from the first LED and reflected off the sheet, and also generate an image signal according to a quantity of received light emitted from the light emitting element and reflected off the sheet; and a controller configured to generate an image representing the sheet from a differential result obtained by removing a component corresponding to the reference signal from the image signal.

5. 发明授权

US11218101B2 Motor control device, method of estimating initial position of magnetic pole of rotor, and image forming apparatus 有权
公开(公告)号：US11218101B2
公开(公告)日：2022-01-04
申请号：US16815588
申请日：2020-03-11
申请人： Konica Minolta, Inc.
发明人： Yuta Tachibana , Hiroyuki Yoshikawa , Yuji Kobayashi , Kazumichi Yoshida , Daichi Suzuki , Harumitsu Fujimori
IPC分类号： H02P21/00 , H02P21/18 , H02P21/22 , G03G15/00 , H02P27/12
摘要： 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.

6. 发明申请

US20190341866A1 MOTOR CONTROLLER, CONVEYOR, IMAGE FORMING APPARATUS, AND MOTOR CONTROL METHOD 审中-公开
公开(公告)号：US20190341866A1
公开(公告)日：2019-11-07
申请号：US16381076
申请日：2019-04-11
申请人： KONICA MINOLTA, INC.
发明人： Harumitsu Fujimori , Yuji Kobayashi , Kazumichi Yoshida
IPC分类号： H02P21/26 , H02P21/22 , H02P21/18 , G03G15/00
摘要： A motor controller that controls a motor in which a rotor using a permanent magnet is rotated by a rotating magnetic field due to a current flowing through a winding: performs hold control that continuously causes a fixed excitation current to flow through the winding to cause a fixed magnetic field for suppressing rotation of the rotor to be generated in a suspension period in which the motor is stopped; performs hold enhancement control that enhances the fixed magnetic field with input of a timing signal defined in advance as a trigger, in the suspension period; and starts rotational excitation control that generates the rotating magnetic field when a rotation start timing arrives.

7. 发明申请

US20230095964A1 IMAGE FORMING SYSTEM AND CONTROL METHOD OF THE SYSTEM 有权
公开(公告)号：US20230095964A1
公开(公告)日：2023-03-30
申请号：US17862763
申请日：2022-07-12
申请人： Konica Minolta, Inc.
发明人： Hidenori Mine , Masayuki Watanabe , Harumitsu Fujimori , Takanobu Shiki
IPC分类号： H04N1/00
摘要： An image forming system includes: an image forming device that is disposed at a first conveyance path and forms an image on a recording medium that is a continuous sheet or a long sheet; a first conveyor that conveys the recording medium on the first conveyance path in a conveyance direction; an image reader that reads the image formed on the recording medium at a second conveyance path on a downstream side of the first conveyance path in the conveyance direction; a second conveyor that conveys the recording medium on the second conveyance path; and a controller that controls a speed of a drive source of the first conveyor and controls a torque of a drive source of the second conveyor.

8. 发明授权

US10734932B2 Motor controller, conveyor, image forming apparatus, and motor control method 有权
公开(公告)号：US10734932B2
公开(公告)日：2020-08-04
申请号：US16381076
申请日：2019-04-11
申请人： KONICA MINOLTA, INC.
发明人： Harumitsu Fujimori , Yuji Kobayashi , Kazumichi Yoshida
IPC分类号： H02P21/26 , H02P21/22 , G03G15/00 , H02P21/18
摘要： A motor controller that controls a motor in which a rotor using a permanent magnet is rotated by a rotating magnetic field due to a current flowing through a winding: performs hold control that continuously causes a fixed excitation current to flow through the winding to cause a fixed magnetic field for suppressing rotation of the rotor to be generated in a suspension period in which the motor is stopped; performs hold enhancement control that enhances the fixed magnetic field with input of a timing signal defined in advance as a trigger, in the suspension period; and starts rotational excitation control that generates the rotating magnetic field when a rotation start timing arrives.

9. 发明申请

US20170272599A1 READING APPARATUS, READING METHOD, AND READING PROGRAM 审中-公开
公开(公告)号：US20170272599A1
公开(公告)日：2017-09-21
申请号：US15444433
申请日：2017-02-28
申请人： Konica Minolta, Inc.
发明人： Hitoshi Asano , Katsuhide Sakai , Tomonobu Tamura , Harumitsu Fujimori
IPC分类号： H04N1/031 , H04N1/028 , H04N1/03
CPC分类号： H04N1/0318 , H04N1/0285 , H04N1/02865 , H04N1/02895 , H04N1/0306 , H04N2201/0081 , H04N2201/02487 , H04N2201/02493 , H04N2201/02497
摘要： A reading apparatus that reads a sheet includes: a first light emitting diode (LED) configured to emit light with a specific wavelength; a light emitting element including a second LED configured to emit light with the specific wavelength and a phosphor configured to be excited by the light emitted from the second LED; a line sensor configured to generate a reference signal according to a quantity of received light emitted from the first LED and reflected off the sheet, and also generate an image signal according to a quantity of received light emitted from the light emitting element and reflected off the sheet; and a controller configured to generate an image representing the sheet from a differential result obtained by removing a component corresponding to the reference signal from the image signal.

10. 发明授权

US09201361B2 Image forming apparatus 有权
标题翻译：图像形成装置
公开(公告)号：US09201361B2
公开(公告)日：2015-12-01
申请号：US14490502
申请日：2014-09-18
申请人： KONICA MINOLTA, INC.
发明人： Harumitsu Fujimori
IPC分类号： G03G15/20
CPC分类号： G03G15/2039 , G03G15/205 , G03G15/5062
摘要： Provided is an image forming apparatus including: a heater heating a fixing member; an acquisition unit acquiring, when an image for one page includes a coded identifier image, information on a range of formation of the coded identifier image on a recording sheet in a sheet-passing direction; a target temperature switching unit switching a target temperature at which temperature of the fixing member is to be maintained at least between a first fixing temperature and a second fixing temperature higher than the first fixing temperature; a controller controlling the heater so that the temperature of the fixing member is maintained at the target temperature, wherein the target temperature switching unit switches the target temperature at a timing such that the temperature of the fixing member is equal to the second fixing temperature while a toner image in the range of formation of the coded identifier image is being fixed.
摘要翻译：提供了一种图像形成装置，包括：加热器，固定构件; 获取单元，当一页的图像包括编码标识符图像时，获取关于在片材通过方向上的记录片材上的编码标识符图像的形成范围的信息; 目标温度切换单元切换定影构件的温度至少保持在高于第一定影温度的第一定影温度和第二定影温度之间的目标温度; 控制加热器的控制器，使得固定部件的温度保持在目标温度，其中目标温度切换单元在固定部件的温度等于第二定影温度的定时切换目标温度，而在编码标识符图像的形成范围内的调色剂图像是固定的。

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