-
公开(公告)号：US12191786B2
公开(公告)日：2025-01-07
申请号：US18146650
申请日：2022-12-27
Applicant: CANON KABUSHIKI KAISHA
Inventor： Masatoshi Itoh
Abstract: A motor control apparatus includes: a motor configured to drive a load; and a control unit configured to control the motor. The control unit is configured to, when activating the motor, determine whether a predetermined condition for determining that fluctuation in magnitude of the load occurs is satisfied, activate the motor in a first mode when the predetermined condition is satisfied, and activate the motor in a second mode when the predetermined condition is not satisfied, and the first mode is a mode in which an increase in rotation speed of the motor is gentler than an increase in rotation speed of the motor in the second mode.
-
2.发明公开公开(公告)号：US20240061365A1
公开(公告)日：2024-02-22
申请号：US18498141
申请日：2023-10-31
Applicant: Canon Kabushiki Kaisha
Inventor： Masatoshi Itoh
CPC classification number: G03G15/5004 , H02P21/18 , H02P21/22 , G03G15/5008 , G03G15/80
Abstract: The motor control apparatus includes: a setting unit configured to set a limit value of coil current flowing through a coil of a motor; a current supply unit configured to supply the motor with the coil current in a range not exceeding the limit value set by the setting unit; a detection unit configured to detect a current value of the coil current; and a comparison unit configured to compare an average value of the current value detected by the detection unit over a predetermined time period with a first threshold value. When the average value has exceeded the first threshold value, the setting unit updates the limit value in a decreasing manner.
-
公开(公告)号：US10069435B2
公开(公告)日：2018-09-04
申请号：US15845255
申请日：2017-12-18
Applicant: CANON KABUSHIKI KAISHA
Inventor： Masatoshi Itoh
Abstract: The power supply apparatus configured to supply power to a load includes a control unit that corrects a power amount calculated by a power calculation unit based on a first voltage of an AC power supply calculated by a voltage calculation unit when the power amount is calculated, and a second voltage of the AC power supply calculated by the voltage calculation unit when a switching unit is controlled to start power supply to a power supply and a first transformer from the AC power supply.
-
公开(公告)号：US09823617B2
公开(公告)日：2017-11-21
申请号：US15267747
申请日：2016-09-16
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yasuhiro Shimura , Masatoshi Itoh
CPC classification number: G03G15/80 , G03G15/2039 , G03G15/2053 , H02M3/04 , H02M5/293 , H02M7/04 , H02M2001/0058 , Y02B70/1491
Abstract: The power supply apparatus includes a first line and a second line to each of which an AC voltage is input from an AC power supply; a conversion element configured to convert the AC voltage to be input to the first line or the second line into a current corresponding to the AC voltage; a voltage detection unit including a first current transformer, the first current transformer including a primary winding and a secondary winding, the voltage detection unit being configured to detect an AC voltage output from the secondary winding of the first current transformer through supply of the current converted by the conversion element to the primary winding; and a zero cross detection unit configured to detect a zero cross timing of the AC power supply based on the AC voltage detected by the voltage detection unit.
-
公开(公告)号：US09348277B2
公开(公告)日：2016-05-24
申请号：US14804169
申请日：2015-07-20
Applicant: CANON KABUSHIKI KAISHA
Inventor： Minoru Hayasaki , Hiroshi Mano , Aoji Isono , Masatoshi Itoh , Yusuke Isomi
IPC: G03G15/20
CPC classification number: G03G15/2039 , G03G15/2042 , G03G15/2053 , G03G2215/2035
Abstract: A fixing apparatus configured to include a rotational member having a conductive layer, a coil having a helical shape, a resonance circuit including a resonance capacitor and configured to be formed together with the rotational member and the coil, a first converter driving the resonance circuit, a second converter used to control power to be supplied to the first converter, a frequency setting unit configured to set a driving frequency of the first converter according to at least one of a size of the recording material and a temperature at a sheet non-passing portion of the rotational member, and a power control unit controlling the second converter according to a temperature at a sheet passing portion of the rotational member to control the power to be supplied to the first converter from the second converter, wherein the conductive layer is caused to generate heat by electromagnetic induction.
Abstract translation: 一种定影装置，包括具有导电层的旋转构件，具有螺旋形状的线圈，包括谐振电容器的谐振电路，并且被配置为与所述旋转构件和所述线圈一起形成，驱动所述谐振电路的第一转换器， 用于控制向第一转换器供电的第二转换器，频率设定单元，被配置为根据记录材料的尺寸和不通过的纸张的温度中的至少一个来设置第一转换器的驱动频率 旋转构件的一部分，以及功率控制单元，根据旋转构件的片材通过部分处的温度来控制第二转换器，以控制从第二转换器提供给第一转换器的功率，其中引起导电层 通过电磁感应产生热量。
-
Patent Agency Ranking
公开(公告)号：US20150093134A1
公开(公告)日：2015-04-02
申请号：US14503692
申请日：2014-10-01
Applicant: CANON KABUSHIKI KAISHA
Inventor： Masatoshi Itoh
CPC classification number: G03G15/80 , G03G15/2039 , G03G2215/2035
Abstract: An image forming apparatus includes: a power source portion; a fixing portion; and a controller. The controller sets a waveform of a current to be passed through each of first and second heat-generating-elements of the fixing portion in one-control-period so that, in an equiphase half wave in one control period, the current passes through one heat-generating-element from a halfway point of the half wave and the current passes through or does not pass through the other heat-generating-element throughout a half wave period. The controller sets a current supply starting timing of the current passing through the one heat-generating-element, at timing when a current passing toward the power source portion stops.
Abstract translation: 一种成像设备包括：电源部分; 固定部; 和控制器。 控制器在一个控制周期内设定要通过固定部分的第一和第二发热元件的每一个的电流的波形，使得在一个控制周期的同相半波中，电流通过一个 来自半波中途的发热元件，并且电流在半波周期内通过或不通过另一发热元件。 在通过电源部分的电流停止的定时，控制器设定通过一个发热元件的电流的电流供应开始定时。
-
公开(公告)号：US20150043934A1
公开(公告)日：2015-02-12
申请号：US14452401
申请日：2014-08-05
Applicant: CANON KABUSHIKI KAISHA
Inventor： Masatoshi Itoh , Tetsuya Yamamoto
IPC: G03G15/20
CPC classification number: G03G15/205 , G03G15/2039 , G03G15/50 , G03G2215/00599 , G03G2215/2035
Abstract: An image forming apparatus includes an image forming unit, a fixing unit having a heater, a temperature detection unit, a power control unit, and a conveyance control unit that controls conveying a recording material. The conveyance control unit executes, when the maximum power is greater than a threshold power, a first mode where conveyance is performed according to a time, and executes, in a case where the maximum power is less than the threshold power, a second mode where conveyance is performed according to the detected temperature. The power control unit sets a larger value to the threshold power when an option device is connected to the image forming apparatus as compared to when the option device is not connected to the image forming apparatus.
Abstract translation: 图像形成装置包括图像形成单元，具有加热器的定影单元，温度检测单元，功率控制单元和控制传送记录材料的输送控制单元。 当最大功率大于阈值功率时，输送控制单元执行根据时间进行输送的第一模式，并且在最大功率小于阈值功率的情况下执行第二模式，其中 根据检测到的温度进行输送。 与选择装置未连接到图像形成装置相比，当选项装置连接到图像形成装置时，功率控制单元将阈值功率设置为更大的值。
-
公开(公告)号：US11932031B2
公开(公告)日：2024-03-19
申请号：US16845306
申请日：2020-04-10
Applicant: CANON KABUSHIKI KAISHA
Inventor： Masatoshi Itoh
CPC classification number: B41J29/38 , B41J13/0009 , G03G15/00
Abstract: A motor control apparatus configured to control a motor, includes: a drive circuit of the motor including a semiconductor device and being installed on a different substrate from a substrate of the motor; a load switching unit configured to set a load of the motor in a first state as a first load, and set a load of the motor in a second state as a second load that is smaller than the first load; and a control unit configured to control the drive circuit and the load switching unit, wherein the control unit is configured to control the drive circuit to start rotation of the motor when the load switching unit is in the second state.
-
公开(公告)号：US20220171317A1
公开(公告)日：2022-06-02
申请号：US17523596
申请日：2021-11-10
Applicant: CANON KABUSHIKI KAISHA
Inventor： Masatoshi Itoh
Abstract: An image forming apparatus includes at least one or more rotary members, a motor configured to drive the at least one or more rotary members, a detection unit configured to detect a current value flowing in the motor, and a display unit configured to display information on a state of the at least one or more rotary members. The current value is detected by the detection unit while the at least one or more rotary members are being driven by the motor. When the current value is a first value, information indicating that the at least one or more rotary members are in an abnormal state is not displayed on the display unit. When the current value is a second value larger than the first value, information indicating that the at least one or more rotary members are in the abnormal state is displayed on the display unit.
-
公开(公告)号：US20210373478A1
公开(公告)日：2021-12-02
申请号：US17335392
申请日：2021-06-01
Applicant: Canon Kabushiki Kaisha
Inventor： Masatoshi Itoh
IPC: G03G15/00
Abstract: An image forming apparatus includes a developing roller, a motor, a motor control portion configured to control the motor, a drive switching unit configured to switch between transmission and non-transmission of the rotational driving force of the motor relative to the developing roller, a current detection portion configured to detect a current value of a current to the motor, and an acquisition unit configured to acquire information relating to a rotation amount of the developing roller. The acquisition unit is configured to acquire the information relating to the rotation amount of the developing roller on the basis of a transmission timing at which the rotational driving force is allowed to be transmitted to the developing roller by the drive switching unit and a non-transmission timing at which the rotational driving force is prevented from being transmitting to the developing roller by the drive switching unit.
-
-
-
-
-
-
-
-
-
Search Results
59
records
(took 0.022 seconds)
