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公开(公告)号：US20180287499A1
公开(公告)日：2018-10-04
申请号：US15903419
申请日：2018-02-23
申请人： Konica Minolta Inc.
CPC分类号： H02M3/1584 , H02M3/33507 , H02M7/1557 , H02M2001/0035 , H02M2001/0045 , H02M2003/1566 , Y02B70/16
摘要： A power supply device includes: a power supply circuit that converts an AC voltage into a DC voltage; and a control circuit that controls the power supply circuit, wherein the power supply circuit includes: a rectifying and smoothing circuit that rectifies and smoothes the AC voltage; a first voltage converting circuit that converts the voltage and outputs a first DC voltage; a second voltage converting circuit that switches the first DC voltage by a switching circuit to output a second DC voltage; a feedback circuit that detects and feeds back an output voltage of the first voltage converting circuit; and a selection circuit that switches a reference voltage of the feedback circuit, and the control circuit sets the switching circuit to be in a continuous connection state when a normal mode is shifted to a power saving mode and gradually switches the reference voltage.
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公开(公告)号：US20210356891A1
公开(公告)日：2021-11-18
申请号：US17315877
申请日：2021-05-10
申请人： KONICA MINOLTA, INC.
IPC分类号： G03G15/00
摘要： An image forming device includes: a transfer unit transferring a toner image to a sheet; a resistance measurement member disposed on the upstream side in a sheet carriage direction of the transfer unit and for measuring resistance of the sheet; a charge elimination member disposed between the transfer unit and the resistance measurement member in the sheet carriage direction; a first voltage applying unit applying voltage for resistance measurement to the resistance measurement member; and a second voltage applying unit applying voltage of reverse bias of the voltage for resistance measurement to the charge elimination member. The width of a charge elimination region by the charge elimination member is wider than that of a charged region by the resistance measurement member in a direction perpendicular to the sheet carriage direction. The absolute value of the voltage for charge elimination is smaller than that of the voltage for resistance measurement.
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公开(公告)号：US20170123368A1
公开(公告)日：2017-05-04
申请号：US15297663
申请日：2016-10-19
申请人： Konica Minolta, Inc.
CPC分类号： G03G15/80 , G03G2215/0132 , H02M3/335 , H02M3/337 , H02M3/338 , H04N1/00888 , H04N1/00904
摘要： A power supply device including: a transformer generating, from an input voltage, low output voltage and high output voltage; an upper limiter circuit receiving the high output voltage and controlling the high output voltage not to exceed a maximum; a power controller performing feedback control on the input voltage so that the low output voltage matches a target voltage; an operation mode acquirer configured to acquire an operation mode of an image forming device; and a target value controller configured to change the target voltage depending upon the acquired operation mode. The target voltage when consumption amount of current with the high output voltage is relatively great ensures that the high output voltage does not fall below a minimum of a rated voltage range of the high output voltage, and is higher than the target voltage when consumption amount of current with the high output voltage is relatively small.
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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
申请人： Konica Minolta, Inc.
CPC分类号： G03G15/0266 , G03G15/065
摘要： 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.
摘要翻译： 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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公开(公告)号：US20200023637A1
公开(公告)日：2020-01-23
申请号：US16502889
申请日：2019-07-03
申请人： Konica Minolta, Inc.
摘要： A heater includes: a planar heat generator; a power supply circuit that controls supply of power to the planar heat generator; a plurality of temperature sensors that is provided on the planar heat generator and measures a temperature; and a hardware processor that controls the power supply circuit in a predetermined condition to maintain a temperature measured by at least one of the plurality of temperature sensors at a target value, wherein the planar heat generator includes: an insulator; and a heat generator disposed on the insulator, the heat generator includes each of a plurality of linear parts extending in parallel with each other at a predetermined interval P, and each of the plurality of temperature sensors is disposed along a direction orthogonal to an extending direction of each of the plurality of linear parts at a position mutually shifted by a predetermined distance D.
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公开(公告)号：US20190227471A1
公开(公告)日：2019-07-25
申请号：US16243774
申请日：2019-01-09
申请人： KONICA MINOLTA, INC.
IPC分类号： G03G15/00
摘要： An image forming device includes: a conductive roller that abuts the image carrier to rotate; a power supply circuit that applies voltage to the roller; a controller that controls the power supply circuit so as to apply the voltage to the roller over a predetermined detection period in a state in which the image carrier and the roller are rotated; a detection value acquirer that acquires a detection value acquired by the application of the voltage indicating a state of the image carrier in the detection period; and a state detector that detects a state of the image carrier on the basis of a plurality of acquired detection values, wherein a length of the detection period is set to a length at which both the numbers of rotations of the image carrier and the roller from a start of the detection period are integers.
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7.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
申请人： KONICA MINOLTA, INC.
CPC分类号： H02P6/15 , G03G15/5008 , G03G15/757 , G03G15/80 , H02P6/16 , H02P6/22
摘要： 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.
摘要翻译： 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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8.发明公开公开(公告)号：US20230375968A1
公开(公告)日：2023-11-23
申请号：US18134262
申请日：2023-04-13
申请人： KONICA MINOLTA, INC.
CPC分类号： G03G15/5029 , G06K15/4065
摘要： Provided is an image forming system capable of accurately detecting the resistance of a recording material. The image forming system includes an application roller that applies a voltage to a recording material on a conveyance path, and a controller that calculates the electric resistance of the recording material from a relationship between the voltage applied to the application roller and a current. The controller calculates the resistance of the recording material based on first profile information that is acquired by changing the applied voltage and corresponds to a change in the resistance of the application roller, and second profile information that is acquired by changing the applied voltage in a state where the recording material is sandwiched and corresponds to the change in the resistance of the application roller.
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公开(公告)号：US20210026287A1
公开(公告)日：2021-01-28
申请号：US16930890
申请日：2020-07-16
申请人： Konica Minolta, Inc.
IPC分类号： G03G15/00
摘要： A power supply apparatus includes a predetermined mode in which power consumption is suppressed and a normal mode in which the power consumption is not suppressed and which supplies power to an apparatus. the power supply apparatus includes the following, a cutting member which cuts off supply of the power to a fixing heater; a noise removing member which is positioned in a later stage of the cutting member and which removes noise in the power; and a controller which controls the cutting member. The controller controls the cutting member to cut off supply of the power to the noise removing member in the predetermined mode.
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公开(公告)号：US20200031114A1
公开(公告)日：2020-01-30
申请号：US16502961
申请日：2019-07-03
申请人： Konica Minolta, Inc.
IPC分类号： B41J2/045
摘要： A heater includes: a planar heat generator; a power supply circuit that controls supply of power to the planar heat generator; a plurality of temperature sensors that is provided on the planar heat generator and measures a temperature; and a hardware processor that detects abnormality of the temperature sensor in a case where a difference in temperature measured by each of two of the temperature sensors out of the plurality of temperature sensors exceeds an abnormality threshold value after a predetermined waiting time has elapsed since the supply of power to the planar heat generator is stopped.
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