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1.发明申请CONTROL METHOD FOR THREE-PHASE DC BRUSHLESS MOTOR, CONTROL DEVICE, AND IMAGE FORMING DEVICE 有权三相直流无刷马达，控制装置和图像形成装置的控制方法公开(公告)号：US20160373034A1
公开(公告)日：2016-12-22
申请号：US15181633
申请日：2016-06-14
Applicant: KONICA MINOLTA, INC.
Inventor： Yuta TACHIBANA , Katsuhide SAKAI , Yasuhiro KOIDE , Yuhei TATSUMOTO
CPC classification number: H02P6/15 , G03G15/5008 , G03G15/757 , G03G15/80 , H02P6/16 , H02P6/22
Abstract: A control method for a three-phase DC brushless motor including a rotor that includes a plurality of magnetic poles and that is rotatable, a stator that includes a plurality of magnetic field generation parts to generate a magnetic field to be a driving source of the rotor, and a sensor to detect a magnetic pole of the rotor which pole passes through a first position in the stator is provided, the method including: detecting in which the sensor detects a first magnetic pole of the rotor which pole passes through the first position; estimating, based on a result of the detection of the first magnetic pole, time until the first magnetic pole reaches a second position in the stator; and controlling the plurality of magnetic field generation parts in such a manner that a suitable magnetic field is generated when the first magnetic pole passes through the second position.
Abstract translation: 一种用于三相DC无刷电动机的控制方法，包括具有多个磁极并且可旋转的转子，包括多个磁场产生部分的定子，以产生作为转子的驱动源的磁场 以及传感器，用于检测所述转子的磁极通过所述定子中的第一位置的磁极，所述方法包括：检测所述传感器检测所述转子的第一磁极通过所述第一位置; 基于第一磁极的检测结果，估计直到第一磁极到达定子中的第二位置的时间; 并且以这样的方式控制多个磁场产生部分，使得当第一磁极通过第二位置时产生合适的磁场。
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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
Applicant: KONICA MINOLTA, INC.
Inventor： Daichi SUZUKI , Yuta TACHIBANA , Hiroyuki YOSHIKAWA , Yasuhiro KOIDE
Abstract: 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
Applicant: KONICA MINOLTA, INC.
Inventor： Yasuhiro KOIDE , Yuta TACHIBANA , Daichi SUZUKI , Hiroyuki YOSHIKAWA
Abstract: 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：US20160238962A1
公开(公告)日：2016-08-18
申请号：US15041613
申请日：2016-02-11
Applicant: Konica Minolta, Inc.
Inventor： Yuhei TATSUMOTO , Katsuhide SAKAI , Yasuhiro KOIDE , Yuta TACHIBANA
CPC classification number: G03G15/0266 , G03G15/065
Abstract: An image forming apparatus includes: a photosensitive member rotated in a predetermined direction; a charging unit configured to charge a circumferential surface of the photosensitive member; a developing unit carrying a developer including toner and carriers, and including a developer bearing member configured to apply toner charged in a first polarity to the circumferential surface of the photosensitive member; a first voltage applying unit configured to apply a first voltage of the first polarity to the charging unit; a second voltage applying unit configured to apply a second voltage of the first polarity to the developer bearing member; a first voltage detecting unit configured to detect the first voltage; a second voltage detecting unit configured to detect the second voltage; and a controller, wherein the controller determines whether or not to make a second rate lower than a first rate according to the second voltage at a first timing.
Abstract translation: 图像形成装置包括：沿预定方向旋转的感光构件; 充电单元，其构造成对感光构件的圆周表面充电; 携带包括调色剂和载体的显影剂的显影单元，并且包括构造成将以第一极性填充的调色剂施加到感光构件的圆周表面的显影剂承载构件; 第一电压施加单元，被配置为将第一极性的第一电压施加到充电单元; 第二电压施加单元，被配置为将第一极性的第二电压施加到显影剂承载部件; 第一电压检测单元，被配置为检测第一电压; 第二电压检测单元，被配置为检测第二电压; 以及控制器，其中，所述控制器在第一定时根据所述第二电压确定是否使比第一速率低的第二速率。
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5.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
Applicant: KONICA MINOLTA, INC.
Inventor： Hiroyuki YOSHIKAWA , Yuta TACHIBANA , Yuji KOBAYASHI , Kazumichi YOSHIDA , Daichi SUZUKI , Harumitsu FUJIMORI
Abstract: 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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Patent Agency Ranking
公开(公告)号：US20180234037A1
公开(公告)日：2018-08-16
申请号：US15888934
申请日：2018-02-05
Applicant: Konica Minolta, Inc.
Inventor： Daichi SUZUKI , Yuta TACHIBANA , Hiroyuki YOSHIKAWA , Yasuhiro KOIDE
CPC classification number: H02P6/08 , H02P6/17 , H02P6/18 , H02P6/28 , H02P21/18 , H02P27/08 , H04N1/00928 , H04N2201/0082
Abstract: 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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7.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
Applicant: Konica Minolta, Inc.
Inventor： Daichi SUZUKI , Yuta TACHIBANA , Hiroyuki YOSHIKAWA , Yasuhiro KOIDE
IPC: G03G21/16
CPC classification number: 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
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.
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公开(公告)号：US20150028533A1
公开(公告)日：2015-01-29
申请号：US14337416
申请日：2014-07-22
Applicant: KONICA MINOLTA, INC.
Inventor： Takaki KATO , Yuji KOBAYASHI , Yuta TACHIBANA , Hiroshi YAMAGUCHI , Satoshi TESHIMA
CPC classification number: B65H7/14 , B65H3/0607 , B65H2511/22 , B65H2513/514 , B65H2553/414 , B65H2553/44 , B65H2701/1311 , B65H2701/1313 , B65H2801/06 , B65H2220/01 , B65H2220/03 , B65H2220/02
Abstract: A sheet feeder picking up and transporting sheets includes a transport unit transporting sheets along a sheet transport path one by one, a gap occurrence detection unit detecting, within a predetermined section of the sheet transport path, occurrence of a gap between sheets, and a controller controlling a timing of the transport of sheets according to a result of the detection. The gap occurrence detection unit includes a first detection unit and a second detection unit. The first detection unit is configured to detect light that is emitted toward the predetermined section, reaches a converging surface thereof across the predetermined section, and converged on a receiving element thereof. The second detection unit is configured to detect light reflected by a sheet passing through the predetermined section. The occurrence of the gap is detected based on outputs from the first detection unit and the second detection unit.
Abstract translation: 送纸器拾取和传送纸张包括一个传送单元，一个一个地沿着纸张传送路径传送纸张;间隙发生检测单元，检测在纸张传送路径的预定部分内发生纸张之间的间隙;以及控制器 根据检测结果控制纸张的传送定时。 间隙发生检测单元包括第一检测单元和第二检测单元。 第一检测单元被配置为检测朝向预定部分发射的光，到达其预定部分的会聚表面，并且会聚在其接收元件上。 第二检测单元被配置为检测通过预定区段的片材反射的光。 基于来自第一检测单元和第二检测单元的输出检测间隙的发生。
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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
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.
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10.发明申请公开(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
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.
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