公开(公告)号：US10790767B2

公开(公告)日：2020-09-29

申请号：US16401416

申请日：2019-05-02

Applicant: KONICA MINOLTA, INC.

Inventor： Hiroyuki Yoshikawa ,  Daichi Suzuki ,  Yuta Tachibana

IPC: H02P25/08 ,  H02P6/185 ,  H02K11/22 ,  H02P25/089 ,  H02K1/27

Abstract: A control device of a permanent magnet synchronous motor that is a control device of a sensorless-type permanent magnet synchronous motor in which a rotor using a permanent magnet rotates by a rotating magnetic field caused by a current flowing in an armature includes: a driver that applies a voltage to the armature and drives the rotor; an initial position estimator that estimates an initial position which is a magnetic pole position of the rotor that is stopped; and a controller that controls the driver so as to apply a pulse train including a voltage pulse for searching the initial position for each of n angle positions dividing a search range of an electrical angle of 360 degrees to the armature, wherein the pulse train includes a first pulse and a second pulse.

公开(公告)号：US10141878B2

公开(公告)日：2018-11-27

申请号：US15813690

申请日：2017-11-15

Applicant: KONICA MINOLTA, INC.

Inventor： Daichi Suzuki ,  Yuta Tachibana ,  Hiroyuki Yoshikawa ,  Yasuhiro Koide

IPC: H02P1/46 ,  H02P3/18 ,  H02P6/00 ,  H02P21/18 ,  H02P6/18 ,  H02P6/17 ,  H02P21/34 ,  H02P6/185

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.

公开(公告)号：US09929686B2

公开(公告)日：2018-03-27

申请号：US15647597

申请日：2017-07-12

Applicant: Konica Minolta, Inc.

Inventor： Daichi Suzuki ,  Yuta Tachibana ,  Hiroyuki Yoshikawa ,  Yasuhiro Koide

IPC: G05D23/00 ,  H02P21/26 ,  H02P21/14 ,  H02P21/18 ,  G01K7/16 ,  H02P6/17 ,  H02K1/27 ,  H02K17/14 ,  H02K19/12 ,  H02K19/32

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：US09671711B2

公开(公告)日：2017-06-06

申请号：US14932434

申请日：2015-11-04

Applicant: Konica Minolta, Inc.

Inventor： Makoto Shimazoe ,  Akihiro Hayashi ,  Hiroyuki Yoshikawa ,  Toshikazu Higashi

IPC: G03G15/00 ,  G03G15/02 ,  G03G15/01

CPC classification number: G03G15/0266 ,  G03G15/0136 ,  G03G15/80

Abstract: 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.

公开(公告)号：US09533850B2

公开(公告)日：2017-01-03

申请号：US14687580

申请日：2015-04-15

Applicant: Konica Minolta, Inc.

Inventor： Hiroyuki Yoshikawa ,  Yuta Tachibana ,  Takaki Kato ,  Daichi Suzuki

IPC: B65H7/20 ,  B65H5/06 ,  B65H5/26 ,  B65H7/06 ,  G03G15/00

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传送辊附近的传送传感器，以便精确地检测记录纸的移动量;传送延迟确定单元，用于确定记录纸的传送延迟;以及传送控制单元， 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。