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。

公开(公告)号：US20230375968A1

公开(公告)日：2023-11-23

申请号：US18134262

申请日：2023-04-13

Applicant: KONICA MINOLTA, INC.

Inventor： Yuhei TATSUMOTO ,  Akimasa ISHIKAWA ,  Makoto SHIMAZOE ,  Yuta TACHIBANA ,  Kouei CHO

IPC: G03G15/00 ,  G06K15/00

CPC classification number: G03G15/5029 ,  G06K15/4065

Abstract: Provided is an image forming system capable of accurately detecting the resistance of a recording material. The image forming system includes an application roller that applies a voltage to a recording material on a conveyance path, and a controller that calculates the electric resistance of the recording material from a relationship between the voltage applied to the application roller and a current. The controller calculates the resistance of the recording material based on first profile information that is acquired by changing the applied voltage and corresponds to a change in the resistance of the application roller, and second profile information that is acquired by changing the applied voltage in a state where the recording material is sandwiched and corresponds to the change in the resistance of the application roller.

公开(公告)号：US20200235683A1

公开(公告)日：2020-07-23

申请号：US16737093

申请日：2020-01-08

Applicant: KONICA MINOLTA, INC.

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

IPC: H02P6/185 ,  G03G15/00 ,  H02P6/15 ,  H02P6/06 ,  H02P6/08 ,  H02P6/17 ,  H02P6/22 ,  H02P6/28 ,  H02P21/18 ,  H02P27/08

Abstract: A control circuit of a motor control device estimates an initial magnetic pole position of a rotor using an inductive sensing scheme. When estimating the initial magnetic pole position, a drive circuit applies a voltage to a stator winding at each of L electrical angles (L≥5) while changing the L electrical angles. An absolute value of an electrical angle difference of the voltage applied to the stator winding between an i-th time (2≤i≤L) and an i−1st time is 180−360/L degrees or more and 180+360/L degrees or less. An absolute value of an electrical angle difference of the voltage applied to the stator winding between a 1st time for initial position estimation and a last time before starting initial position estimation is 180−360/L degrees or more and 180+360/L degrees or less.

公开(公告)号：US20180019693A1

公开(公告)日：2018-01-18

申请号：US15647597

申请日：2017-07-12

Applicant: Konica Minolta, Inc.

Inventor： Daichi SUZUKI ,  Yuta TACHIBANA ,  Hiroyuki YOSHIKAWA ,  Yasuhiro KOIDE

IPC: H02P21/14 ,  G01K7/16 ,  H02K17/14 ,  H02K1/27 ,  H02K19/32 ,  H02K19/12

CPC classification number: H02P21/26 ,  G01K7/16 ,  G03G21/16 ,  H02K1/2753 ,  H02K1/2786 ,  H02K17/14 ,  H02K19/12 ,  H02K19/32 ,  H02P6/17 ,  H02P21/141 ,  H02P21/18 ,  H02P25/022 ,  H02P29/64 ,  H02P29/662

Abstract: A controller for a permanent magnet synchronous motor includes an estimating portion configured to determine an estimated value of a rotational speed of the rotor and an estimated value of a position of magnetic poles of the rotor based on a value of the current detected by the current detector and a parameter value indicating an interlinkage magnetic flux caused by the permanent magnet across the winding; a control unit configured to control the drive portion to cause the rotating magnetic field based on the estimated value of the rotational speed and the estimated value of the position of the magnetic poles; and a correction portion configured to correct the parameter value indicating the interlinkage magnetic flux based on correction information, the correction information being determined based on a temperature of the winding and a relationship between the temperature of the winding and a temperature of the permanent magnet.

公开(公告)号：US20160226430A1

公开(公告)日：2016-08-04

申请号：US15009021

申请日：2016-01-28

Applicant: Konica Minolta, Inc.

Inventor： Yuta TACHIBANA ,  Katsuhide SAKAI ,  Yasuhiro KOIDE ,  Yuhei TATSUMOTO

IPC: H02P1/04

CPC classification number: H02P29/60 ,  G03G15/5004 ,  G03G15/80 ,  H02P29/032

Abstract: In a device for controlling a motor mounted on a system with different operation modes, a controller unit calculates an input value for the motor based on an output value of the motor and a target value depending on operation modes of the system, and instructs a driver circuit of the motor to apply the input value to the motor. An estimation unit estimates an amount of rise in temperature of the motor by applying the input value for the motor to a thermal model of the motor. A notification unit compares a value estimated by the estimation unit with a threshold value. When the estimated value exceeds the threshold value, the notification unit sends a request for change of operation mode to the system.

Abstract translation: 在用于控制安装在具有不同操作模式的系统上的电动机的装置中，控制器单元基于电动机的输出值和取决于系统的操作模式的目标值来计算电动机的输入值，并指示驾驶员 电机的电路将输入值应用于电机。 估计单元通过将马达的输入值应用于马达的热模型来估计马达的温度上升量。 通知单元将由估计单元估计的值与阈值进行比较。 当估计值超过阈值时，通知单元向系统发送改变操作模式的请求。

公开(公告)号：US20140205340A1

公开(公告)日：2014-07-24

申请号：US14159529

申请日：2014-01-21

Applicant: KONICA MINOLTA, INC.

Inventor： Hiroshi YAMAGUCHI ,  Takaki KATO ,  Yuta TACHIBANA ,  Yuji KOBAYASHI ,  Satoshi TESHIMA

IPC: G03G15/00

CPC classification number: G03G15/167 ,  B65H5/06 ,  B65H7/20 ,  B65H9/006 ,  B65H9/14 ,  B65H29/68 ,  B65H2404/14 ,  B65H2511/514 ,  B65H2513/222 ,  B65H2513/512 ,  B65H2557/242 ,  B65H2701/1311 ,  B65H2801/06 ,  G03G15/602 ,  G03G15/6561 ,  H04N1/00588 ,  H04N1/00602 ,  H04N1/00652 ,  H04N2201/0082 ,  B65H2220/02 ,  B65H2220/01

Abstract: An image processing apparatus includes: a transport roller for transporting a sheet subjected to image processing; a motor that drives the transport roller to rotate; and a speed reduction unit that performs a speed reduction control on the motor to temporarily stop the sheet, the speed reduction control being performed in a manner that a stopping time and a stopping distance each satisfy a corresponding target range, wherein the speed reduction control includes: a first control that is a control of reducing a rotation speed of the motor to a reference speed through at least two operations from among a braking operation, a powering operation, and a free running operation; and a second control that is a control of, after a rotation amount of the motor from the start of the speed reduction control reaches a reference value, continuously performing the braking operation until the stop of the motor.

Abstract translation: 一种图像处理设备包括：用于传送经过图像处理的片材的传送辊; 驱动输送辊旋转的马达; 以及减速单元，其对所述电动机进行减速控制以暂时停止所述纸张，所述减速控制以停止时间和停止距离各自满足相应的目标范围的方式进行，其中所述减速控制包括 ：第一控制装置，其是通过制动操作，动力操作和自由行驶操作中的至少两个操作来将马达的转速降低到基准速度的控制; 以及作为控制的第二控制，在从减速控制开始开始的电动机的旋转量达到基准值之后，持续进行制动操作直到电动机的停止。