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公开(公告)号：US20250093806A1
公开(公告)日：2025-03-20
申请号：US18883613
申请日：2024-09-12
Applicant: Konica Minolta, Inc.
Inventor： Yumiko IZUMIYA , Hiroyuki MARUYAMA , Hitoshi ASANO , Hiroyuki YOSHIKAWA , Akimasa ISHIKAWA , Yasuo KOYANAGI
IPC: G03G15/00
Abstract: An image forming system including: a hardware processor, wherein the hardware processor is configured to perform, a first control parameter determination operation that determines a value of a control parameter for sheet processing; a second control parameter determination operation that determines the value of the control parameter for the sheet processing by a method different from the first control parameter determination operation; and a selection operation configured to be capable of setting which of the first control parameter determination operation and the second control parameter determination operation is used to determine the value of at least one of a plurality of control parameters.
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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
Applicant: Konica Minolta, Inc.
Inventor： Akimasa ISHIKAWA , Hitoshi ASANO , Yumiko IZUMIYA , Yasuo KOYANAGI , Hiroyuki YOSHIKAWA
CPC classification number: G01N21/4738 , G03G15/16 , G03G15/5029 , G01N2021/8917 , G03G2215/00751 , G03G2215/00772 , G03G2215/00776
Abstract: 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.-
3.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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4.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：US20230370556A1
公开(公告)日：2023-11-16
申请号：US18196582
申请日：2023-05-12
Applicant: KONICA MINOLTA, INC.
Inventor： Yumiko IZUMIYA , Hitoshi ASANO , Yasuhiro KOIDE , Hiroyuki YOSHIKAWA
IPC: H04N1/00
CPC classification number: H04N1/00652 , H04N1/00408
Abstract: 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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Patent Agency Ranking
6.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
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.
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7.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
Applicant: Konica Minolta, Inc.
Inventor： Daichi SUZUKI , Yuta TACHIBANA , Hiroyuki YOSHIKAWA , Yasuhiro KOIDE
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.
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8.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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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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10.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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