公开(公告)号：US10020760B2

公开(公告)日：2018-07-10

申请号：US15181633

申请日：2016-06-14

Applicant: KONICA MINOLTA, INC.

Inventor： Yuta Tachibana ,  Katsuhide Sakai ,  Yasuhiro Koide ,  Yuhei Tatsumoto

IPC: H02K29/12 ,  H02P6/15 ,  H02P6/16 ,  H02P6/22 ,  G03G15/00

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.

公开(公告)号：US20250068111A1

公开(公告)日：2025-02-27

申请号：US18786872

申请日：2024-07-29

Applicant: Konica Minolta, Inc.

Inventor： Katsuhide Sakai ,  Takeshi Nomura

IPC: G03G15/00 ,  G01J1/44

Abstract: An image forming apparatus includes a detection element and a hardware processor. The detection element includes a receiving section that receives a specific signal and an output section that outputs a predetermined output value based on the specific signal received by the receiving section. The hardware processor determines in accordance with a status of an output from the output section, a state of deterioration that leads to a state in which the detection element needs to be replaced.

公开(公告)号：US11334012B2

公开(公告)日：2022-05-17

申请号：US17337054

申请日：2021-06-02

Applicant: Konica Minolta Inc.

Inventor： Masahiro Nonoyama ,  Masahiro Kamiya ,  Katsuhide Sakai ,  Junichi Masuda ,  Taku Kimura

IPC: G03G15/00

Abstract: An image formation apparatus includes: an image former that forms an image on a recording medium delivered along a predetermined delivery path and outputs the recording medium; a first hardware processor that judges whether or not the recording medium is an envelope; a second hardware processor that acquires a basis weight of the recording medium; a third hardware processor that determines control for when an image is formed on the recording medium on the basis of a judgment result from the first hardware processor and a basis weight acquired by the second hardware processor; and a fourth hardware processor that controls operation of the image former on the basis of a determination result from the third hardware processor.

公开(公告)号：US11186457B2

公开(公告)日：2021-11-30

申请号：US16834160

申请日：2020-03-30

Applicant: Konica Minolta Inc.

Inventor： Masahiro Nonoyama ,  Masahiro Kamiya ,  Katsuhide Sakai ,  Junichi Masuda ,  Taku Kimura

IPC: B65H7/12 ,  B65H7/14 ,  B65H5/36

Abstract: Provided is a sheet conveyance apparatus armored with a housing, the sheet conveyance apparatus includes: a sheet conveyor that feeds a sheet to a downstream side in a direction of conveyance; a conveyance guide that guides the sheet to be conveyed; an ultrasonic sensor that detects the sheet guided by the conveyance guide; and a shield member that is conductive, wherein the ultrasonic sensor includes: a transmitter that transmits an ultrasonic wave having a predetermined frequency; and a receiver that receives the ultrasonic wave, the transmitter and the receiver are arranged along the conveyance guide, and the shield member is disposed between the housing and the receiver in a sheet-face perpendicular direction at an ultrasonic-irradiation position of the sheet being conveyed, the shield member covering an entirety of the receiver in plan view in the sheet-face perpendicular direction.

公开(公告)号：US20180175751A1

公开(公告)日：2018-06-21

申请号：US15839981

申请日：2017-12-13

Applicant: Konica Minolta, Inc.

Inventor： Kazumichi Yoshida ,  Katsuhide Sakai ,  Tomonobu Tamura ,  Hitoshi Asano ,  Harumitsu Fujimori

IPC: H02P3/02 ,  H02P3/14 ,  H02P21/36 ,  G03G15/00

CPC classification number: H02P3/025 ,  G03G15/6529 ,  H02P3/14 ,  H02P21/36

Abstract: 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.