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公开(公告)号：US20240272071A1
公开(公告)日：2024-08-15
申请号：US18430060
申请日：2024-02-01
申请人： Konica Minolta, Inc.
CPC分类号： G01N21/4738 , G03G15/16 , G03G15/5029 , G01N2021/8917 , G03G2215/00751 , G03G2215/00772 , G03G2215/00776
摘要： A media detection apparatus for detecting moisture information corresponding to a moisture amount or a moisture percentage of a sheet, the media detection apparatus comprising:
a light emitter that emits light;
a light receiver that receives the light reflected off the sheet or transmitted through the sheet; and
a first hardware processor that determines the moisture information on the basis of temperature information corresponding to a temperature of the media detection apparatus and an output of the light receiver.-
2.发明申请公开(公告)号：US20180167009A1
公开(公告)日：2018-06-14
申请号：US15813690
申请日：2017-11-15
申请人： KONICA MINOLTA, INC.
摘要： A controller for a sensorless permanent magnet synchronous motor having a rotor using a permanent magnet, the rotor rotating by a rotating magnetic field, caused by a current flowing through an armature is provided. The controller is configured to apply a pulse voltage for generating a magnetic field vector for searching for the initial position to each of search sections obtained by dividing a target range, narrow down a target range in such a manner that a search section in which a largest amount of current flows through the armature by application of the pulse voltage is selected as a subsequent target range, and repeat the application processing and the narrow-down processing to estimate the initial position.
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3.发明申请公开(公告)号：US20180123492A1
公开(公告)日：2018-05-03
申请号：US15784347
申请日：2017-10-16
申请人： KONICA MINOLTA, INC.
摘要： A method for controlling a permanent magnet synchronous motor having a rotor using a permanent magnet, the rotor rotating by a rotating magnetic field caused by a current flowing through an armature is provided. The method includes: presuming, based on a target speed and an estimated speed that is an estimated value of a rotational speed of the rotor, whether or not a step-out occurs; correcting, when it is presumed that a step-out occurs, an estimated angle that is an estimated value of a position of magnetic poles of the rotor; and controlling, based on a post-correction estimated angle that is the estimated angle after the correction, a current flowing through the armature to cause the rotating magnetic field rotating at the target speed.
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公开(公告)号：US20230370556A1
公开(公告)日：2023-11-16
申请号：US18196582
申请日：2023-05-12
申请人： KONICA MINOLTA, INC.
IPC分类号： H04N1/00
CPC分类号： H04N1/00652 , H04N1/00408
摘要： A recording material determination device, includes: a conveyor that conveys recording materials along a conveyance path; a detector that is provided at a middle of the conveyance path, and detects a characteristic value of each of the recording materials in conveyance; and a hardware processor that controls driving of the conveyor, stops a first recording material among the recording materials at the detector, and does not stop a second recording material that is conveyed after the first recording material, wherein the hardware processor determines whether the second recording material changes with respect to the first recording material, based on a first characteristics detection result of the first recording material detected by the detector, and on a second characteristics detection result of the second recording material detected by the detector.
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5.发明申请公开(公告)号：US20200235683A1
公开(公告)日：2020-07-23
申请号：US16737093
申请日：2020-01-08
申请人： KONICA MINOLTA, INC.
发明人： Daichi SUZUKI , Yuji KOBAYASHI , Kazumichi YOSHIDA , Harumitsu FUJIMORI , Yuta TACHIBANA , Hiroyuki YOSHIKAWA
IPC分类号： H02P6/185 , G03G15/00 , H02P6/15 , H02P6/06 , H02P6/08 , H02P6/17 , H02P6/22 , H02P6/28 , H02P21/18 , H02P27/08
摘要： 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.
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6.发明申请公开(公告)号：US20180019693A1
公开(公告)日：2018-01-18
申请号：US15647597
申请日：2017-07-12
申请人： Konica Minolta, Inc.
CPC分类号： 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
摘要： 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.
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7.发明申请公开(公告)号：US20200295688A1
公开(公告)日：2020-09-17
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
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.
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公开(公告)号：US20180234037A1
公开(公告)日：2018-08-16
申请号：US15888934
申请日：2018-02-05
申请人： Konica Minolta, Inc.
CPC分类号： H02P6/08 , H02P6/17 , H02P6/18 , H02P6/28 , H02P21/18 , H02P27/08 , H04N1/00928 , H04N2201/0082
摘要： A motor controller includes: a velocity calculation unit for obtaining an angle θ(n), which shows a rotation position, and an angular velocity ω(n) of a rotor at a time point n; a compensation amount calculation unit for calculating a compensation angle Δθ by which the rotor advances from the time point n to a (n+1)th control cycle (a control cycle starting from a time point n+1), based on an angular acceleration a(n) of the rotor, an angular velocity ω(n) of the rotor at the time point n and a time length T of the control cycle; and a PWM inverter for controlling a voltage to be applied to a coil such that a rotating magnetic field based on a rotation position of the rotor advanced by the compensation angle Δθ from the rotation position of the rotor at the time point n is formed in the (n+1)th control cycle.
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9.发明申请公开(公告)号：US20180019700A1
公开(公告)日：2018-01-18
申请号：US15635325
申请日：2017-06-28
申请人： Konica Minolta, Inc.
IPC分类号： G03G21/16
CPC分类号： H02P21/26 , G01K7/16 , G03G21/16 , G03G21/1647 , G03G2221/1657 , H02K1/2753 , H02K1/2786 , H02K17/14 , H02K19/12 , H02K19/32 , H02P6/17 , H02P6/18 , H02P21/141 , H02P21/18 , H02P25/022 , H02P25/024 , H02P29/64 , H02P29/662
摘要： 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.
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公开(公告)号：US20160139531A1
公开(公告)日：2016-05-19
申请号：US14932434
申请日：2015-11-04
申请人： Konica Minolta, Inc.
IPC分类号： G03G15/02
CPC分类号： G03G15/0266 , G03G15/0136 , G03G15/80
摘要： 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.
摘要翻译： 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。
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